Compare commits

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3 Commits

Author SHA1 Message Date
Orhun Parmaksız
0b700afdb9 chore(release): set the tag for changelog 2023-07-31 16:41:04 +03:00
Orhun Parmaksız
c70a84b3fe chore(release): configure git-cliff 2023-07-31 16:37:23 +03:00
Orhun Parmaksız
8ed244eeb9 feat(release): add automation for creating nightly releases 2023-07-31 16:30:39 +03:00
486 changed files with 21658 additions and 88118 deletions

16
.cargo-husky/hooks/pre-push Executable file
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@@ -0,0 +1,16 @@
#!/usr/bin/env bash
if !(command cargo-make >/dev/null 2>&1); then # Check if cargo-make is installed
echo Attempting to run cargo-make as part of the pre-push hook but it\'s not installed.
echo Please install it by running the following command:
echo
echo " cargo install --force cargo-make"
echo
echo If you don\'t want to run cargo-make as part of the pre-push hook, you can run
echo the following command instead of git push:
echo
echo " git push --no-verify"
exit 1
fi
cargo make ci

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@@ -1,2 +0,0 @@
[alias]
xtask = "run --package xtask --"

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@@ -1,115 +0,0 @@
# skip entries from <https://github.com/ratatui/ratatui/pull/1652>
50af9a5d80ed5446f3e6cc554911f606580edde9
272e9709c6eed45cd7e0c183624b7898f4e0ae69
adc8fdc35aa57d6dad2ae8dd30ec2e9256576c09
31711dbf82a4c7bb3b78692da34d9f469725dd6e
b6356aa7a529a491d63dd6628b8985adae337f16
885558b6f89df642317d39c5b44c94c742d1e0c8
6440eb9d76379340953420629ab0a3d9039d6c48
3870583ea868452191857f9bda97a3d5c35d0a4f
487edc8399683fb8a9a66359729c015780d248f2
250c222cc4aaab09184a28efc68f75ca03133794
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6443f7408af4a8834bc68cd35d2ba9be47e45f38
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ac342231c344e893f2f630ee38167aab28c736a6
0fb103680028a6e26a1923f87b60bde51acaec4f
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71480242a926f98e9081ed6e2dc8c381757b3a42
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38490ff8da6f11e309ba1bcb3e88a562f7c953c5
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06af14107e70e49a4cba3babb8ab0a0c57b4bdf8
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2dc81833c60951d16f9bd60f3da003edfc9a11f5
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74194759756bb111b4da3e9a5cdb968275a2fab0
38b2f27efe0e1829bc503df7fd64b94b7bb80d97
21aa3232d762d6e3f81f15fc5b66ba462385ac05
903bb0ae32d22393783edfda96db900739864f0a
5cee13ab6d9c49751cf9283d9099e37f0cc3632c
0a0997702dd4cf2217160f5652f5c39cbd4a1010
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7d23bd2ceaf96e81972b5f746fdcba0d17f6391f
2c02a56bce31519386303571e0b66b7d4beb378e
f33d51e7d9ccf9fe52ec3289d04d97c722d9ee17
91cd81aaa032887bb2327bc3fe3cad6b3c9fbacf
5d5a1ccb0b4e2f293f215ce026fba33f1c069689
6b9417db5f2adbdc60e9dd8dc5acbbe2a1f77ba9
dce1e4b138eb1333c9e773bacd579a8cdddd73fb
b4aacb045e2200896b0d0136a2b8688b47828d73
dcba0bcd5d5d6e33ddc1fa94ebb94819fdda600e
6f52350ecfb62e3a5bac16f0824e74b757cc6cd2
2c6f324b9aa5034771e00758b143fd8df94d859d
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07aff91b015b5e7e0504680c12edbce70d7dba1e
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9a7467b30576d5cb7491ea6e09efcae97eadf9bb
a0c35f1d7bcce10e092582b95f5b0a3f20ad7bf3
d24747d46982192b575a40b8cc18d1c948fac3d7
8060f7bc578b29dde6ca0c4c64569f9c73218f46
0dc5b2d2e0aa6438ffc1b3965b1ab31c721adbcc
8ecdd892f53d7db95bbb53a61700d36e3fcefdd4
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3855c3a84a77037aeee40dbe9e52454fb1f9afee
93372f35c1669da0138ca776890f3ff3d38a6539
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2f97d35bd8618e8c0cc006cb1d4a9b151c1b9b4a
39d5a745acbbd3510de707d4e7c471c17e02ae59
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ad54cf29ad1a4335ba208fb94a8fc5dfbba260e3
c7649575e7b199794be4252f79da80aaecdcee28
8913e2ce1f40d451ddb4527f08ec75f198d5063c
1b9e310300f22bfc72364f027a9caeddadf61a99
89d7dd46031511f0556b2d29ab34035f42e3a24c
ca4fa0b9bf5ba707aa0447ba7c38fbacdadb7eec
8cecfdf2f6dd5b0de507f79b469517cc0fb42add
7eeb6afb3dbc56e52f9387a74f826b186cd19137
d0f75eb371a96f8d5f174e23de074efd840e9e44
f8a70ea9da8e6df2bf7a5f74cce45615fc292afe
f28b9730061bffadb9d87ad63edf7d10b245d2c1
afc5cf2140f22fea6bd6933dd0f9c302229a1980
b75df78cdca58d5dca0c51fb8e106067aa6cb752
28f5a6dbd4091aa3efa86eed6767eeb44a655f0f
345e6a1ebd853858463a33953585ce407a60378c
c45a4de47c601554f6b981d211181468b4798e41
bbaa9a5432ff6ad5518344123c3b56f349347e99
f804c90f96221f334371ccd01b0e6df7b1cfc1e8
16ba867c5877d8c97968987ecb5f8bff966d0a82
38a1474ca12aa6a796afc1e277882d997a999e14
92c4078413fc79fcc83f5d3d8708abb58696ff1a
d4415204e1eb3aed2a74a722aeaaa274975dd2d7
e48bcf5f21f14acb27996fdc02231c140f5b817c

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@@ -32,17 +32,17 @@ schema_pattern = "(build|chore|ci|docs|feat|fix|perf|refactor|revert|style|test)
type = "list"
name = "change_type"
choices = [
{ value = "build", name = "build: Changes that affect the build system or external dependencies (example scopes: pip, docker, npm)", key = "b" },
{ value = "chore", name = "chore: A modification that generally does not fall into any other category", key = "c" },
{ value = "ci", name = "ci: Changes to our CI configuration files and scripts (example scopes: GitLabCI)", key = "i" },
{ value = "docs", name = "docs: Documentation only changes", key = "d" },
{ value = "feat", name = "feat: A new feature.", key = "f" },
{ value = "fix", name = "fix: A bug fix.", key = "x" },
{ value = "perf", name = "perf: A code change that improves performance", key = "p" },
{ value = "refactor", name = "refactor: A code change that neither fixes a bug nor adds a feature", key = "r" },
{ value = "revert", name = "revert: Revert previous commits", key = "v" },
{ value = "style", name = "style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)", key = "s" },
{ value = "test", name = "test: Adding missing or correcting existing tests", key = "t" },
{ value = "build", name = "build: Changes that affect the build system or external dependencies (example scopes: pip, docker, npm)", key = "b" },
{ value = "chore", name = "chore: A modification that generally does not fall into any other category", key = "c" },
{ value = "ci", name = "ci: Changes to our CI configuration files and scripts (example scopes: GitLabCI)", key = "i" },
{ value = "docs", name = "docs: Documentation only changes", key = "d" },
{ value = "feat", name = "feat: A new feature.", key = "f" },
{ value = "fix", name = "fix: A bug fix.", key = "x" },
{ value = "perf", name = "perf: A code change that improves performance", key = "p" },
{ value = "refactor", name = "refactor: A code change that neither fixes a bug nor adds a feature", key = "r" },
{ value = "revert", name = "revert: Revert previous commits", key = "v" },
{ value = "style", name = "style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)", key = "s" },
{ value = "test", name = "test: Adding missing or correcting existing tests", key = "t" },
]
message = "Select the type of change you are committing"

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@@ -2,12 +2,6 @@
root = true
[*]
charset = utf-8
end_of_line = lf
insert_final_newline = true
trim_trailing_whitespace = true
[*.rs]
indent_style = space
indent_size = 4

9
.github/CODEOWNERS vendored
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@@ -1,11 +1,8 @@
# See <https://help.github.com/articles/about-codeowners/>
# See https://help.github.com/articles/about-codeowners/
# for more info about CODEOWNERS file
# It uses the same pattern rule for gitignore file
# <https://git-scm.com/docs/gitignore#_pattern_format>
# https://git-scm.com/docs/gitignore#_pattern_format
# Maintainers
* @ratatui/maintainers
* @orhun @mindoodoo @sayanarijit @sophacles @joshka @kdheepak

2
.github/FUNDING.yml vendored
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@@ -1,2 +0,0 @@
github: ratatui
open_collective: ratatui

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@@ -2,7 +2,7 @@
name: Bug report
about: Create an issue about a bug you encountered
title: ''
labels: 'Type: Bug'
labels: bug
assignees: ''
---
@@ -13,43 +13,31 @@ A detailed and complete issue is more likely to be processed quickly.
-->
## Description
<!--
A clear and concise description of what the bug is.
-->
## To Reproduce
## To Reproduce
<!--
Try to reduce the issue to a simple code sample exhibiting the problem.
Ideally, fork the project and add a test or an example.
-->
## Expected behavior
## Expected behavior
<!--
A clear and concise description of what you expected to happen.
-->
## Screenshots
## Screenshots
<!--
If applicable, add screenshots, gifs or videos to help explain your problem.
-->
## Are you willing to contribute a fix?
<!--
If you would like to work on a fix, check one of the boxes below. Maintainers can help point
you to the right place in the codebase.
-->
- [ ] I am willing to open a PR for this bug.
- [ ] I can try to investigate, but I will need guidance.
- [ ] I am not able to work on a fix right now.
## Environment
<!--
Add a description of the systems where you are observing the issue. For example:
- OS: Linux
@@ -66,7 +54,6 @@ Add a description of the systems where you are observing the issue. For example:
- Backend:
## Additional context
<!--
Add any other context about the problem here.
If you already looked into the issue, include all the leads you have explored.

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@@ -1,14 +1 @@
blank_issues_enabled: false
contact_links:
- name: Frequently Asked Questions
url: https://ratatui.rs/faq/
about: Check the website FAQ section to see if your question has already been answered
- name: Ratatui Forum
url: https://forum.ratatui.rs
about: Ask questions about ratatui on our Forum
- name: Discord Chat
url: https://discord.gg/pMCEU9hNEj
about: Ask questions about ratatui on Discord
- name: Matrix Chat
url: https://matrix.to/#/#ratatui:matrix.org
about: Ask questions about ratatui on Matrix

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@@ -2,19 +2,17 @@
name: Feature request
about: Suggest an idea for this project
title: ''
labels: 'Type: Enhancement'
labels: enhancement
assignees: ''
---
## Problem
<!--
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
-->
## Solution
<!--
A clear and concise description of what you want to happen.
Things to consider:
@@ -24,24 +22,11 @@ Things to consider:
-->
## Alternatives
<!--
A clear and concise description of any alternative solutions or features you've considered.
-->
## Are you willing to contribute an implementation?
<!--
If you would like to work on this, check one of the boxes below. Maintainers can help refine
the scope and discuss approach.
-->
- [ ] I am willing to open a PR implementing this.
- [ ] I can try to implement it, but I will need guidance.
- [ ] I am not able to implement this right now.
## Additional context
<!--
Add any other context or screenshots about the feature request here.
-->

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@@ -1,81 +0,0 @@
# GitHub Copilot Code Review Instructions
## General Review Principles
### Pull Request Size and Scope
- **Flag large PRs**: Comment if a PR changes more than 500 lines or touches many unrelated areas
- **Suggest splitting**: Recommend breaking large changes into smaller, focused PRs
- **Question scope creep**: Ask about unrelated changes that seem outside the PR's stated purpose
### Code Quality and Style
- **Check adherence to style guidelines**: Verify changes follow the project's Rust conventions in [CONTRIBUTING.md](https://github.com/ratatui/ratatui/blob/main/CONTRIBUTING.md#code-formatting)
- **Verify xtask compliance**: Ensure `cargo xtask format` and `cargo xtask lint` would pass
- **Look for AI-generated patterns**: Be suspicious of verbose, overly-commented, or non-idiomatic code
### Architectural Considerations
- **Reference ARCHITECTURE.md**: Point to [ARCHITECTURE.md](https://github.com/ratatui/ratatui/blob/main/ARCHITECTURE.md) for changes affecting crate boundaries
- **Question fundamental changes**: Flag modifications to core configuration, linting rules, or build setup without clear justification
- **Verify appropriate crate placement**: Ensure changes are in the correct crate per the modular structure
### Breaking Changes and Deprecation
- **Require deprecation**: Insist on deprecation warnings rather than immediate removal of public APIs
- **Ask for migration path**: Request clear upgrade instructions for breaking changes
- **Suggest feature flags**: Recommend feature flags for experimental or potentially disruptive changes
- **Reference versioning policy**: Point to the requirement of at least one version notice before removal
### Testing and Documentation
- **Verify test coverage**: Ensure new functionality includes appropriate tests
- **Check for test removal**: Question any removal of existing tests without clear justification
- **Require documentation**: Ensure public APIs are documented with examples
- **Validate examples**: Check that code examples are minimal and follow project style
### Specific Areas of Concern
#### Configuration Changes
- **Lint configuration**: Question changes to `.clippy.toml`, `rustfmt.toml`, or CI configuration
- **Cargo.toml modifications**: Scrutinize dependency changes or workspace modifications
- **Build system changes**: Require justification for xtask or build process modifications
#### Large Code Additions
- **Question necessity**: Ask if large code additions could be implemented more simply
- **Check for duplication**: Look for code that duplicates existing functionality
- **Verify integration**: Ensure new code integrates well with existing patterns
#### File Organization
- **Validate module structure**: Ensure new modules follow the project's organization
- **Check import organization**: Verify imports follow the std/external/local grouping pattern
- **Review file placement**: Confirm files are in appropriate locations per ARCHITECTURE.md
## Comment Templates
### For Large PRs
```
This PR seems quite large with changes across multiple areas. Consider splitting it into smaller, focused PRs:
- Core functionality changes
- Documentation updates
- Test additions
- Configuration changes
See our [contribution guidelines](https://github.com/ratatui/ratatui/blob/main/CONTRIBUTING.md#keep-prs-small-intentional-and-focused) for more details.
```
### For Breaking Changes
```
This appears to introduce breaking changes. Please consider:
- Adding deprecation warnings instead of immediate removal
- Providing a clear migration path in the PR description
- Following our [deprecation policy](https://github.com/ratatui/ratatui/blob/main/CONTRIBUTING.md#deprecation-notice)
```
### For Configuration Changes
```
Changes to project configuration (linting, formatting, build) should be discussed first. Please explain:
- Why this change is necessary
- What problem it solves
- Whether it affects contributor workflow
```
### For Style Issues
```
Please run `cargo xtask format` and `cargo xtask lint` to ensure code follows our style guidelines. See [CONTRIBUTING.md](https://github.com/ratatui/ratatui/blob/main/CONTRIBUTING.md#code-formatting) for details.
```

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@@ -1,18 +0,0 @@
# To get started with Dependabot version updates, you'll need to specify which
# package ecosystems to update and where the package manifests are located.
# Please see the documentation for all configuration options:
# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
version: 2
updates:
# Maintain dependencies for Cargo
- package-ecosystem: "cargo"
directory: "/" # Location of package manifests
schedule:
interval: "weekly"
# Maintain dependencies for GitHub Actions
- package-ecosystem: github-actions
directory: "/"
schedule:
interval: weekly
open-pull-requests-limit: 10

80
.github/workflows/cd.yml vendored Normal file
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@@ -0,0 +1,80 @@
name: Continuous Deployment
on:
workflow_dispatch:
schedule:
# At 00:00 on Saturday
# https://crontab.guru/#0_0_*_*_6
- cron: "0 0 * * 6"
push:
tags:
- "v*.*.*"
defaults:
run:
shell: bash
jobs:
publish-nightly:
name: Create a nightly release
runs-on: ubuntu-latest
if: ${{ !startsWith(github.event.ref, 'refs/tags/v') }}
steps:
- name: Checkout the repository
uses: actions/checkout@v3
with:
fetch-depth: 0
- name: Calculate the next release
run: |
suffix="-alpha"
last_tag="$(git describe --abbrev=0 --tags `git rev-list --tags --max-count=1`)"
if [[ "${last_tag}" = *"${suffix}"* ]]; then
# increment the alpha version
alpha=$(echo "${last_tag}" | grep -oE '([0-9]+)$')
next_alpha=$((alpha + 1))
next_tag=$(echo "${last_tag}" | sed "s/\.[0-9]\+$/\.${next_alpha}/")
else
# start the alpha version from 0
next_tag="${last_tag}${suffix}.0"
fi
# update the crate version
msg="# crate version"
sed -E -i "s/^version = .* ${msg}$/version = \"${next_tag#v}\" ${msg}/" Cargo.toml
echo "NEXT_TAG=${next_tag}" >> $GITHUB_ENV
echo "Next nightly release: ${next_tag} 🐭"
- name: Publish on crates.io
uses: actions-rs/cargo@v1
with:
command: publish
args: --dry-run --allow-dirty
- name: Generate a changelog
uses: orhun/git-cliff-action@v2
with:
config: cliff.toml
args: --unreleased --tag ${{ env.NEXT_TAG }} --strip header
env:
OUTPUT: BODY.md
- name: Publish on GitHub
uses: ncipollo/release-action@v1
with:
tag: ${{ env.NEXT_TAG }}
prerelease: true
bodyFile: BODY.md
publish-stable:
name: Create a stable release
runs-on: ubuntu-latest
if: ${{ startsWith(github.event.ref, 'refs/tags/v') }}
steps:
- name: Checkout the repository
uses: actions/checkout@v3
- name: Publish on crates.io
uses: actions-rs/cargo@v1
with:
command: publish
args: --dry-run

View File

@@ -1,93 +0,0 @@
name: Check Pull Requests
# Set the permissions of the github token to the minimum and only enable what is needed
# See https://docs.github.com/en/actions/security-guides/automatic-token-authentication#permissions
permissions: {}
on:
# this workflow is required to be run on pull_request_target as it modifies the PR comments
# care should be taken that the jobs do not run any untrusted input
# zizmor: ignore[dangerous-triggers]
pull_request_target:
types:
- opened
- edited
- synchronize
- labeled
- unlabeled
jobs:
check-title:
permissions:
pull-requests: write
runs-on: ubuntu-latest
steps:
- name: Check PR title
if: github.event_name == 'pull_request_target'
uses: amannn/action-semantic-pull-request@48f256284bd46cdaab1048c3721360e808335d50 # v5
id: check_pr_title
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
# Add comment indicating we require pull request titles to follow conventional commits specification
- uses: marocchino/sticky-pull-request-comment@773744901bac0e8cbb5a0dc842800d45e9b2b405 # v2
if: always() && (steps.check_pr_title.outputs.error_message != null)
with:
header: pr-title-lint-error
message: |
Thank you for opening this pull request!
We require pull request titles to follow the [Conventional Commits specification](https://www.conventionalcommits.org/en/v1.0.0/) and it looks like your proposed title needs to be adjusted.
Details:
> ${{ steps.check_pr_title.outputs.error_message }}
# Delete a previous comment when the issue has been resolved
- if: ${{ steps.check_pr_title.outputs.error_message == null }}
uses: marocchino/sticky-pull-request-comment@773744901bac0e8cbb5a0dc842800d45e9b2b405 # v2
with:
header: pr-title-lint-error
delete: true
check-breaking-change-label:
permissions:
pull-requests: write
runs-on: ubuntu-latest
env:
# use an environment variable to pass untrusted input to the script
# see https://securitylab.github.com/research/github-actions-untrusted-input/
PR_TITLE: ${{ github.event.pull_request.title }}
steps:
- name: Check breaking change label
id: check_breaking_change
run: |
pattern='^(build|chore|ci|docs|feat|fix|perf|refactor|revert|style|test)(\(\w+\))?!:'
# Check if pattern matches
if echo "${PR_TITLE}" | grep -qE "$pattern"; then
echo "breaking_change=true" >> $GITHUB_OUTPUT
else
echo "breaking_change=false" >> $GITHUB_OUTPUT
fi
- name: Add label
if: steps.check_breaking_change.outputs.breaking_change == 'true'
uses: actions/github-script@v8
with:
github-token: ${{ secrets.GITHUB_TOKEN }}
script: |
github.rest.issues.addLabels({
issue_number: context.issue.number,
owner: context.repo.owner,
repo: context.repo.repo,
labels: ['Type: Breaking Change']
})
do-not-merge:
if: ${{ contains(github.event.*.labels.*.name, 'do not merge') }}
name: Prevent Merging
runs-on: ubuntu-latest
steps:
- name: Check for label
run: |
echo "Pull request is labeled as 'do not merge'"
echo "This workflow fails so that the pull request cannot be merged"
exit 1

View File

@@ -1,22 +0,0 @@
name: Check Semver
# Set the permissions of the github token to the minimum and only enable what is needed
# See https://docs.github.com/en/actions/security-guides/automatic-token-authentication#permissions
permissions: {}
on:
pull_request:
branches:
- main
jobs:
check-semver:
name: Check semver
runs-on: ubuntu-latest
steps:
- name: Checkout the repository
uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- name: Check semver
uses: obi1kenobi/cargo-semver-checks-action@5b298c9520f7096a4683c0bd981a7ac5a7e249ae # v2

View File

@@ -1,8 +1,4 @@
name: Continuous Integration
# Set the permissions of the github token to the minimum and only enable what is needed
# See https://docs.github.com/en/actions/security-guides/automatic-token-authentication#permissions
permissions: {}
name: CI
on:
# Allows you to run this workflow manually from the Actions tab
@@ -13,6 +9,7 @@ on:
pull_request:
branches:
- main
merge_group:
# ensure that the workflow is only triggered once per PR, subsequent pushes to the PR will cancel
# and restart the workflow. See https://docs.github.com/en/actions/using-jobs/using-concurrency
@@ -20,276 +17,136 @@ concurrency:
group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
cancel-in-progress: true
# lint, clippy and coverage jobs are intentionally early in the workflow to catch simple formatting,
# typos, and missing tests as early as possible. This allows us to fix these and resubmit the PR
# without having to wait for the comprehensive matrix of tests to complete.
env:
# don't install husky hooks during CI as they are only needed for for pre-push
CARGO_HUSKY_DONT_INSTALL_HOOKS: true
# lint, clippy and coveraget jobs are intentionally early in the workflow to catch simple
# formatting, typos, and missing tests as early as possible. This allows us to fix these and
# resubmit the PR without having to wait for the comprehensive matrix of tests to complete.
jobs:
# Lint the formatting of the codebase.
lint-formatting:
name: Check Formatting
lint:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
- name: Checkout
if: github.event_name != 'pull_request'
uses: actions/checkout@v3
- name: Checkout
if: github.event_name == 'pull_request'
uses: actions/checkout@v3
with:
persist-credentials: false
- uses: dtolnay/rust-toolchain@f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 # master
ref: ${{ github.event.pull_request.head.sha }}
- name: Check conventional commits
uses: crate-ci/committed@master
with:
args: "-vv"
commits: HEAD
- name: Check typos
uses: crate-ci/typos@master
- name: Lint dependencies
uses: EmbarkStudios/cargo-deny-action@v1
- name: Install Rust nightly
uses: dtolnay/rust-toolchain@nightly
with:
toolchain: nightly
components: rustfmt
- uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
- uses: taiki-e/install-action@3522286d40783523f9c7880e33f785905b4c20d0 # v2
with:
tool: taplo-cli
- run: cargo xtask format --check
- name: Install cargo-make
uses: taiki-e/install-action@cargo-make
- name: Check formatting
run: cargo make fmt
# Check for typos in the codebase.
# See <https://github.com/crate-ci/typos/>
lint-typos:
name: Check Typos
clippy:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
- name: Checkout
uses: actions/checkout@v3
- name: Install Rust stable
uses: dtolnay/rust-toolchain@stable
with:
persist-credentials: false
- uses: crate-ci/typos@bb4666ad77b539a6b4ce4eda7ebb6de553704021 # master
# Check for any disallowed dependencies in the codebase due to license / security issues.
# See <https://github.com/EmbarkStudios/cargo-deny>
cargo-deny:
runs-on: ubuntu-latest
strategy:
matrix:
checks:
- advisories
- bans licenses sources
# Prevent sudden announcement of a new advisory from failing ci:
continue-on-error: ${{ matrix.checks == 'advisories' }}
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- uses: EmbarkStudios/cargo-deny-action@3fd3802e88374d3fe9159b834c7714ec57d6c979 # v2
with:
rust-toolchain: stable
log-level: info
arguments: --all-features --exclude-unpublished
command: check ${{ matrix.checks }}
# Check for any unused dependencies in the codebase.
# See <https://github.com/bnjbvr/cargo-machete/>
cargo-machete:
name: Check Unused Dependencies
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- uses: bnjbvr/cargo-machete@7959c845782fed02ee69303126d4a12d64f1db18 # v0.9.1
# Run cargo clippy.
#
# We check for clippy warnings on beta, but these are not hard failures. They should often be
# fixed to prevent clippy failing on the next stable release, but don't block PRs on them unless
# they are introduced by the PR.
lint-clippy:
name: Check Clippy
runs-on: ubuntu-latest
strategy:
fail-fast: false
matrix:
toolchain: ["stable", "beta"]
continue-on-error: ${{ matrix.toolchain == 'beta' }}
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- uses: dtolnay/rust-toolchain@f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 # master
with:
toolchain: ${{ matrix.toolchain }}
components: clippy
- uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
- run: cargo xtask clippy
env:
RUSTUP_TOOLCHAIN: ${{ matrix.toolchain }}
- name: Install cargo-make
uses: taiki-e/install-action@cargo-make
- name: Run cargo make clippy-all
run: cargo make clippy
# Run markdownlint on all markdown files in the repository.
lint-markdown:
name: Check Markdown
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- uses: DavidAnson/markdownlint-cli2-action@07035fd053f7be764496c0f8d8f9f41f98305101 # v21
with:
globs: |
'**/*.md'
'!target'
# Run cargo coverage. This will generate a coverage report and upload it to codecov.
# <https://app.codecov.io/gh/ratatui/ratatui>
coverage:
name: Coverage Report
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
- name: Checkout
uses: actions/checkout@v3
- name: Install Rust stable
uses: dtolnay/rust-toolchain@stable
with:
persist-credentials: false
- uses: dtolnay/rust-toolchain@f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 # master
with:
toolchain: stable
components: llvm-tools
- uses: taiki-e/install-action@3522286d40783523f9c7880e33f785905b4c20d0 # v2
- name: Install cargo-llvm-cov and cargo-make
uses: taiki-e/install-action@v2
with:
tool: cargo-llvm-cov
- uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
- run: cargo xtask coverage
- uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
tool: cargo-llvm-cov,cargo-make
- name: Generate coverage
run: cargo make coverage
- name: Upload to codecov.io
uses: codecov/codecov-action@v3
with:
token: ${{ secrets.CODECOV_TOKEN }}
fail_ci_if_error: true
# Run cargo check. This is a fast way to catch any obvious errors in the code.
check:
name: Check ${{ matrix.os }} ${{ matrix.toolchain }}
strategy:
fail-fast: false
matrix:
os: [ubuntu-latest, windows-latest, macos-latest]
toolchain: ["1.86.0", "stable"]
os: [ ubuntu-latest, windows-latest, macos-latest ]
toolchain: [ "1.65.0", "stable" ]
runs-on: ${{ matrix.os }}
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- uses: dtolnay/rust-toolchain@f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 # master
- name: Checkout
uses: actions/checkout@v3
- name: Install Rust {{ matrix.toolchain }}
uses: dtolnay/rust-toolchain@master
with:
toolchain: ${{ matrix.toolchain }}
- uses: taiki-e/install-action@3522286d40783523f9c7880e33f785905b4c20d0 # v2
with:
tool: cargo-hack
- uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
- run: cargo xtask check --all-features
- name: Install cargo-make
uses: taiki-e/install-action@cargo-make
- name: Run cargo make check
run: cargo make check
env:
RUSTUP_TOOLCHAIN: ${{ matrix.toolchain }}
RUST_BACKTRACE: full
build-no-std:
name: Build No-Std
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- uses: dtolnay/rust-toolchain@f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 # master
with:
toolchain: stable
targets: x86_64-unknown-none
- uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
# This makes it easier to debug the exact versions of the dependencies
- run: cargo tree --target x86_64-unknown-none -p ratatui-core
- run: cargo tree --target x86_64-unknown-none -p ratatui-widgets
- run: cargo tree --target x86_64-unknown-none -p ratatui-macros
- run: cargo tree --target x86_64-unknown-none -p ratatui --no-default-features
- run: cargo build --target x86_64-unknown-none -p ratatui-core
- run: cargo build --target x86_64-unknown-none -p ratatui-widgets
- run: cargo build --target x86_64-unknown-none -p ratatui-macros
- run: cargo build --target x86_64-unknown-none -p ratatui --no-default-features
# Check if README.md is up-to-date with the crate's documentation.
check-readme:
name: Check README
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
- uses: taiki-e/install-action@3522286d40783523f9c7880e33f785905b4c20d0 # v2
with:
tool: cargo-rdme
- run: cargo xtask readme --check
# Run cargo rustdoc with the same options that would be used by docs.rs, taking into account the
# package.metadata.docs.rs configured in Cargo.toml. https://github.com/dtolnay/cargo-docs-rs
lint-docs:
name: Check Docs
runs-on: ubuntu-latest
env:
RUSTDOCFLAGS: -Dwarnings
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- uses: dtolnay/rust-toolchain@f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 # master
with:
toolchain: nightly
- uses: dtolnay/install@74f735cdf643820234e37ae1c4089a08fd266d8a # master
with:
crate: cargo-docs-rs
- uses: taiki-e/install-action@3522286d40783523f9c7880e33f785905b4c20d0 # v2
with:
tool: cargo-hack
- uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
- run: cargo xtask docs
# Run cargo test on the documentation of the crate. This will catch any code examples that don't
# compile, or any other issues in the documentation.
test-docs:
name: Test Docs
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- uses: dtolnay/rust-toolchain@f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 # master
with:
toolchain: stable
- uses: taiki-e/install-action@3522286d40783523f9c7880e33f785905b4c20d0 # v2
with:
tool: cargo-hack
- uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
- run: cargo xtask test-docs
# Run cargo test on the libraries of the crate.
test-libs:
name: Test Libs ${{ matrix.toolchain }}
runs-on: ubuntu-latest
test-doc:
strategy:
fail-fast: false
matrix:
toolchain: ["1.86.0", "stable"]
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- uses: dtolnay/rust-toolchain@f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 # master
with:
toolchain: stable
- uses: taiki-e/install-action@3522286d40783523f9c7880e33f785905b4c20d0 # v2
with:
tool: cargo-hack
- uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
- run: cargo xtask test-libs
# Run cargo test on all the backends.
test-backends:
name: Test ${{matrix.backend}} on ${{ matrix.os }}
os: [ ubuntu-latest, windows-latest, macos-latest ]
runs-on: ${{ matrix.os }}
steps:
- name: Checkout
uses: actions/checkout@v3
- name: Install Rust stable
uses: dtolnay/rust-toolchain@stable
- name: Install cargo-make
uses: taiki-e/install-action@cargo-make
- name: Test docs
run: cargo make test-doc
env:
RUST_BACKTRACE: full
test:
strategy:
fail-fast: false
matrix:
os: [ubuntu-latest, windows-latest, macos-latest]
backend: [crossterm, termion, termwiz]
os: [ ubuntu-latest, windows-latest, macos-latest ]
toolchain: [ "1.65.0", "stable" ]
backend: [ crossterm, termion, termwiz ]
exclude:
# termion is not supported on windows
- os: windows-latest
backend: termion
runs-on: ${{ matrix.os }}
steps:
- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
- name: Checkout
uses: actions/checkout@v3
- name: Install Rust ${{ matrix.toolchain }}}
uses: dtolnay/rust-toolchain@master
with:
persist-credentials: false
- uses: dtolnay/rust-toolchain@f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 # master
with:
toolchain: stable
- uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
- run: cargo xtask test-backend ${{ matrix.backend }}
toolchain: ${{ matrix.toolchain }}
- name: Install cargo-make
uses: taiki-e/install-action@cargo-make
- name: Test ${{ matrix.backend }}
run: cargo make test-backend ${{ matrix.backend }}
env:
RUST_BACKTRACE: full

View File

@@ -1,71 +0,0 @@
name: Release-plz
# Set the permissions of the github token to the minimum and only enable what is needed
# See https://docs.github.com/en/actions/security-guides/automatic-token-authentication#permissions
permissions: {}
on:
push:
branches:
- main
workflow_dispatch:
jobs:
# Release unpublished packages.
release-plz-release:
name: Release-plz release
environment: release
permissions:
pull-requests: write
contents: write
id-token: write
runs-on: ubuntu-latest
if: ${{ github.repository_owner == 'ratatui' }}
steps:
- name: Checkout repository
uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
fetch-depth: 0
persist-credentials: false
- name: Install Rust toolchain
uses: dtolnay/rust-toolchain@f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 # master
with:
toolchain: stable
- uses: rust-lang/crates-io-auth-action@b7e9a28eded4986ec6b1fa40eeee8f8f165559ec # v1
id: auth
- name: Run release-plz
uses: release-plz/action@487eb7b5c085a664d5c5ca05f4159bd9b591182a # v0.5
with:
command: release
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
CARGO_REGISTRY_TOKEN: ${{ steps.auth.outputs.token }}
# Create a PR with the new versions and changelog, preparing the next release.
release-plz-pr:
name: Release-plz PR
permissions:
pull-requests: write
contents: write
runs-on: ubuntu-latest
if: ${{ github.repository_owner == 'ratatui' }}
concurrency:
group: release-plz-${{ github.ref }}
cancel-in-progress: false
steps:
- name: Checkout repository
uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
fetch-depth: 0
persist-credentials: false
- name: Install Rust toolchain
uses: dtolnay/rust-toolchain@f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 # master
with:
toolchain: stable
- name: Run release-plz
uses: release-plz/action@487eb7b5c085a664d5c5ca05f4159bd9b591182a # v0.5
with:
command: release-pr
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_TOKEN }}

View File

@@ -1,26 +0,0 @@
name: GitHub Actions Security Analysis with zizmor 🌈
# docs https://docs.zizmor.sh/integrations/#github-actions
on:
push:
branches: ["main"]
pull_request:
branches: ["**"]
permissions: {}
jobs:
zizmor:
name: Run zizmor 🌈
runs-on: ubuntu-latest
permissions:
security-events: write
steps:
- name: Checkout repository
uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
with:
persist-credentials: false
- name: Run zizmor 🌈
uses: zizmorcore/zizmor-action@e639db99335bc9038abc0e066dfcd72e23d26fb4 # v0.3.0

2
.gitignore vendored
View File

@@ -1,6 +1,6 @@
target
Cargo.lock
*.log
*.rs.rustfmt
.gdb_history
.idea/
.env

View File

@@ -1,15 +1,9 @@
# configuration for https://github.com/DavidAnson/markdownlint
first-line-heading: false
no-inline-html:
allowed_elements:
- img
- details
- summary
- div
- br
line-length:
line_length: 100
# to support repeated headers in the changelog
no-duplicate-heading: false

View File

@@ -1,12 +0,0 @@
include = ["**/*.toml"]
[formatting]
column_width = 100
reorder_keys = false
[[rule]]
include = ["**/Cargo.toml"]
keys = ["dependencies", "dev-dependencies", "build-dependencies", "workspace.dependencies"]
[rule.formatting]
reorder_keys = true

View File

@@ -1,203 +0,0 @@
# Ratatui Architecture
This document provides a comprehensive overview of Ratatui's architecture and crate
organization, introduced in version 0.30.0.
## Overview
Starting with Ratatui 0.30.0, the project was reorganized from a single monolithic crate into
a modular workspace consisting of multiple specialized crates. This architectural decision was
made to improve modularity, reduce compilation times, enable more flexible dependency
management, and provide better API stability for third-party widget libraries.
## Crate Organization
The Ratatui project is now organized as a Cargo workspace containing the following crates:
### Core Crates
#### `ratatui` (Main Crate)
- **Purpose**: The main entry point that most applications should use
- **Contents**: Re-exports everything from other crates for convenience, plus experimental features
- **Target Users**: Application developers building terminal UIs
- **Key Features**:
- Complete widget ecosystem
- Backend implementations
- Layout system
- Terminal management
- Experimental `WidgetRef` and `StatefulWidgetRef` traits
#### `ratatui-core`
- **Purpose**: Foundational types and traits for the Ratatui ecosystem
- **Contents**: Core widget traits, text types, buffer, layout, style, and symbols
- **Target Users**: Widget library authors, minimalist projects
- **Key Features**:
- `Widget` and `StatefulWidget` traits
- Text rendering (`Text`, `Line`, `Span`)
- Buffer management
- Layout system
- Style and color definitions
- Symbol collections
#### `ratatui-widgets`
- **Purpose**: Built-in widget implementations
- **Contents**: All standard widgets like `Block`, `Paragraph`, `List`, `Chart`, etc.
- **Target Users**: Applications needing standard widgets, widget library authors
- **Key Features**:
- Complete set of built-in widgets
- Optimized implementations
- Comprehensive documentation and examples
### Backend Crates
#### `ratatui-crossterm`
- **Purpose**: Crossterm backend implementation
- **Contents**: Cross-platform terminal backend using the `crossterm` crate
- **Target Users**: Applications targeting multiple platforms
#### `ratatui-termion`
- **Purpose**: Termion backend implementation
- **Contents**: Unix-specific terminal backend using the `termion` crate
- **Target Users**: Unix-specific applications requiring low-level control
#### `ratatui-termwiz`
- **Purpose**: Termwiz backend implementation
- **Contents**: Terminal backend using the `termwiz` crate
- **Target Users**: Applications needing advanced terminal features
### Utility Crates
#### `ratatui-macros`
- **Purpose**: Declarative macros for common patterns and boilerplate reduction
- **Contents**: Macros for common patterns and boilerplate reduction
- **Target Users**: Applications and libraries wanting macro support
## Dependency Relationships
```text
ratatui
├── ratatui-core
├── ratatui-widgets → ratatui-core
├── ratatui-crossterm → ratatui-core
├── ratatui-termion → ratatui-core
├── ratatui-termwiz → ratatui-core
└── ratatui-macros
```
### Key Dependencies
- **ratatui-core**: Foundation for all other crates
- **ratatui-widgets**: Depends on `ratatui-core` for widget traits and types
- **Backend crates**: Each depends on `ratatui-core` for backend traits and types
- **ratatui**: Depends on all other crates and re-exports their public APIs
## Design Principles
### Stability and Compatibility
The modular architecture provides different levels of API stability:
- **ratatui-core**: Designed for maximum stability to minimize breaking changes for widget
libraries
- **ratatui-widgets**: Focused on widget implementations with moderate stability requirements
- **Backend crates**: Isolated from core changes, allowing backend-specific updates
- **ratatui**: Main crate that can evolve more freely while maintaining backward compatibility
through re-exports
### Compilation Performance
The split architecture enables:
- **Reduced compilation times**: Widget libraries only need to compile core types
- **Parallel compilation**: Different crates can be compiled in parallel
- **Selective compilation**: Applications can exclude unused backends or widgets
### Ecosystem Benefits
- **Widget Library Authors**: Can depend on stable `ratatui-core` without frequent updates
- **Application Developers**: Can use the convenient `ratatui` crate with everything included
- **Minimalist Projects**: Can use only `ratatui-core` for lightweight applications
## Migration Guide
### For Application Developers
Most applications should continue using the main `ratatui` crate with minimal changes:
```rust
// No changes needed - everything is re-exported
use ratatui::{
widgets::{Block, Paragraph},
layout::{Layout, Constraint},
Terminal,
};
```
### For Widget Library Authors
Consider migrating to `ratatui-core` for better stability:
```rust
// Before (0.29.x and earlier)
use ratatui::{
widgets::{Widget, StatefulWidget},
buffer::Buffer,
layout::Rect,
};
// After (0.30.0+)
use ratatui_core::{
widgets::{Widget, StatefulWidget},
buffer::Buffer,
layout::Rect,
};
```
### Backwards Compatibility
All existing code using the `ratatui` crate will continue to work unchanged, as the main crate
re-exports all public APIs from the specialized crates.
## Future Considerations
### Potential Enhancements
- **Widget-specific crates**: Further split widgets into individual crates for even more
granular dependencies
- **Plugin system**: Enable dynamic widget loading and third-party widget ecosystems
- **Feature flags**: More granular feature flags for compile-time customization
### Version Synchronization
Currently, all crates are versioned together for simplicity. Future versions may adopt
independent versioning once the API stabilizes further.
## Related Issues and PRs
This architecture was developed through extensive discussion and implementation across multiple
PRs:
- [Issue #1388](https://github.com/ratatui/ratatui/issues/1388): Original RFC for modularization
- [PR #1459](https://github.com/ratatui/ratatui/pull/1459): Move ratatui crate into workspace
folder
- [PR #1460](https://github.com/ratatui/ratatui/pull/1460): Move core types to ratatui-core
- [PR #1474](https://github.com/ratatui/ratatui/pull/1474): Move widgets into ratatui-widgets
crate
## Contributing
When contributing to the Ratatui project, please consider:
- **Core changes**: Submit PRs against `ratatui-core` for fundamental improvements
- **Widget changes**: Submit PRs against `ratatui-widgets` for widget-specific improvements
- **Backend changes**: Submit PRs against the appropriate backend crate
- **Integration changes**: Submit PRs against the main `ratatui` crate
See the [CONTRIBUTING.md](CONTRIBUTING.md) guide for more details on the contribution process.

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@@ -1,128 +0,0 @@
# Contributor Covenant Code of Conduct
## Our Pledge
We as members, contributors, and leaders pledge to make participation in our
community a harassment-free experience for everyone, regardless of age, body
size, visible or invisible disability, ethnicity, sex characteristics, gender
identity and expression, level of experience, education, socio-economic status,
nationality, personal appearance, race, religion, or sexual identity
and orientation.
We pledge to act and interact in ways that contribute to an open, welcoming,
diverse, inclusive, and healthy community.
## Our Standards
Examples of behavior that contributes to a positive environment for our
community include:
* Demonstrating empathy and kindness toward other people
* Being respectful of differing opinions, viewpoints, and experiences
* Giving and gracefully accepting constructive feedback
* Accepting responsibility and apologizing to those affected by our mistakes,
and learning from the experience
* Focusing on what is best not just for us as individuals, but for the
overall community
Examples of unacceptable behavior include:
* The use of sexualized language or imagery, and sexual attention or
advances of any kind
* Trolling, insulting or derogatory comments, and personal or political attacks
* Public or private harassment
* Publishing others' private information, such as a physical or email
address, without their explicit permission
* Other conduct which could reasonably be considered inappropriate in a
professional setting
## Enforcement Responsibilities
Community leaders are responsible for clarifying and enforcing our standards of
acceptable behavior and will take appropriate and fair corrective action in
response to any behavior that they deem inappropriate, threatening, offensive,
or harmful.
Community leaders have the right and responsibility to remove, edit, or reject
comments, commits, code, wiki edits, issues, and other contributions that are
not aligned to this Code of Conduct, and will communicate reasons for moderation
decisions when appropriate.
## Scope
This Code of Conduct applies within all community spaces, and also applies when
an individual is officially representing the community in public spaces.
Examples of representing our community include using an official e-mail address,
posting via an official social media account, or acting as an appointed
representative at an online or offline event.
## Enforcement
Instances of abusive, harassing, or otherwise unacceptable behavior may be
reported to the community leaders responsible for enforcement at
https://forum.ratatui.rs/ or https://discord.gg/pMCEU9hNEj.
All complaints will be reviewed and investigated promptly and fairly.
All community leaders are obligated to respect the privacy and security of the
reporter of any incident.
## Enforcement Guidelines
Community leaders will follow these Community Impact Guidelines in determining
the consequences for any action they deem in violation of this Code of Conduct:
### 1. Correction
**Community Impact**: Use of inappropriate language or other behavior deemed
unprofessional or unwelcome in the community.
**Consequence**: A private, written warning from community leaders, providing
clarity around the nature of the violation and an explanation of why the
behavior was inappropriate. A public apology may be requested.
### 2. Warning
**Community Impact**: A violation through a single incident or series
of actions.
**Consequence**: A warning with consequences for continued behavior. No
interaction with the people involved, including unsolicited interaction with
those enforcing the Code of Conduct, for a specified period of time. This
includes avoiding interactions in community spaces as well as external channels
like social media. Violating these terms may lead to a temporary or
permanent ban.
### 3. Temporary Ban
**Community Impact**: A serious violation of community standards, including
sustained inappropriate behavior.
**Consequence**: A temporary ban from any sort of interaction or public
communication with the community for a specified period of time. No public or
private interaction with the people involved, including unsolicited interaction
with those enforcing the Code of Conduct, is allowed during this period.
Violating these terms may lead to a permanent ban.
### 4. Permanent Ban
**Community Impact**: Demonstrating a pattern of violation of community
standards, including sustained inappropriate behavior, harassment of an
individual, or aggression toward or disparagement of classes of individuals.
**Consequence**: A permanent ban from any sort of public interaction within
the community.
## Attribution
This Code of Conduct is adapted from the [Contributor Covenant][homepage],
version 2.0, available at
https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
Community Impact Guidelines were inspired by [Mozilla's code of conduct
enforcement ladder](https://github.com/mozilla/diversity).
[homepage]: https://www.contributor-covenant.org
For answers to common questions about this code of conduct, see the FAQ at
https://www.contributor-covenant.org/faq. Translations are available at
https://www.contributor-covenant.org/translations.

View File

@@ -6,26 +6,9 @@ If your contribution is not straightforward, please first discuss the change you
creating a new issue before making the change, or starting a discussion on
[discord](https://discord.gg/pMCEU9hNEj).
## AI Generated Content
We welcome high quality PRs, whether they are human generated or made with the assistance of AI
tools, but we ask that you follow these guidelines:
- **Attribution**: Tell us about your use of AI tools, don't make us guess whether you're using it.
- **Review**: Make sure you review every line of AI generated content for correctness and relevance.
- **Quality**: AI-generated content should meet the same quality standards as human-written content.
- **Quantity**: Avoid submitting large amounts of AI generated content in a single PR. Remember that
quality is usually more important than quantity.
- **License**: Ensure that the AI-generated content is compatible with Ratatui's
[License](./LICENSE).
> [!IMPORTANT]
> Remember that AI tools can assist in generating content, but you are responsible for the final
> quality and accuracy of the contributions and communicating about it.
## Reporting issues
Before reporting an issue on the [issue tracker](https://github.com/ratatui/ratatui/issues),
Before reporting an issue on the [issue tracker](https://github.com/ratatui-org/ratatui/issues),
please check that it has not already been reported by searching for some related keywords. Please
also check [`tui-rs` issues](https://github.com/fdehau/tui-rs/issues/) and link any related issues
found.
@@ -34,54 +17,18 @@ found.
All contributions are obviously welcome. Please include as many details as possible in your PR
description to help the reviewer (follow the provided template). Make sure to highlight changes
which may need additional attention, or you are uncertain about. Any idea with a large scale impact
which may need additional attention or you are uncertain about. Any idea with a large scale impact
on the crate or its users should ideally be discussed in a "Feature Request" issue beforehand.
### Keep PRs small, intentional, and focused
### Keep PRs small, intentional and focused
Try to do one pull request per change. The time taken to review a PR grows exponentially with the size
of the change. Small focused PRs will generally be much faster to review. PRs that include both
Try to do one pull request per change. The time taken to review a PR grows exponential with the size
of the change. Small focused PRs will generally be much more faster to review. PRs that include both
refactoring (or reformatting) with actual changes are more difficult to review as every line of the
change becomes a place where a bug may have been introduced. Consider splitting refactoring /
reformatting changes into a separate PR from those that make a behavioral change, as the tests help
guarantee that the behavior is unchanged.
Guidelines for PR size:
- Aim for PRs under 500 lines of changes when possible.
- Split large features into incremental PRs that build on each other.
- Separate refactoring, formatting, and functional changes into different PRs.
- If a large PR is unavoidable, clearly explain why in the PR description.
### Breaking changes and backwards compatibility
We prioritize maintaining backwards compatibility and minimizing disruption to users:
- **Prefer deprecation over removal**: Add deprecation warnings rather than immediately removing
public APIs
- **Provide migration paths**: Include clear upgrade instructions for any breaking changes
- **Follow our deprecation policy**: Wait at least two versions before removing deprecated items
- **Consider feature flags**: Use feature flags for experimental or potentially disruptive changes
- **Document breaking changes**: Clearly mark breaking changes in commit messages and PR descriptions
See our [deprecation notice policy](#deprecation-notice) for more details.
### Code formatting
Run `cargo xtask format` before committing to ensure that code is consistently formatted with
rustfmt. Configuration is in [`rustfmt.toml`](./rustfmt.toml). We use some unstable formatting
options as they lead to subjectively better formatting. These require a nightly version of Rust
to be installed when running rustfmt. You can install the nightly version of Rust using
[`rustup`](https://rustup.rs/):
```shell
rustup install nightly
```
> [!IMPORTANT]
> Do not modify formatting configuration (`rustfmt.toml`, `.clippy.toml`) without
> prior discussion. These changes affect all contributors and should be carefully considered.
### Search `tui-rs` for similar work
The original fork of Ratatui, [`tui-rs`](https://github.com/fdehau/tui-rs/), has a large amount of
@@ -102,20 +49,21 @@ describes the nature of the problem that the commit is solving and any unintuiti
change. It's rare that code changes can easily communicate intent, so make sure this is clearly
documented.
### Clean up your commits
The final version of your PR that will be committed to the repository should be rebased and tested
against main. Every commit will end up as a line in the changelog, so please squash commits that are
only formatting or incremental fixes to things brought up as part of the PR review. Aim for a single
commit (unless there is a strong reason to stack the commits). See [Git Best Practices - On Sausage
Making](https://sethrobertson.github.io/GitBestPractices/#sausage) for more on this.
### Run CI tests before pushing a PR
Running `cargo xtask ci` before pushing will perform the same checks that we do in the CI process.
It's not mandatory to do this before pushing, however it may save you time to do so instead of
waiting for GitHub to run the checks.
Available xtask commands:
- `cargo xtask ci` - Run all CI checks
- `cargo xtask format` - Format code
- `cargo xtask lint` - Run linting checks
- `cargo xtask test` - Run all tests
Run `cargo xtask --help` to see all available commands.
We're using [cargo-husky](https://github.com/rhysd/cargo-husky) to automatically run git hooks,
which will run `cargo make ci` before each push. To initialize the hook run `cargo test`. If
`cargo-make` is not installed, it will provide instructions to install it for you. This will ensure
that your code is formatted, compiles and passes all tests before you push. If you need to skip this
check, you can use `git push --no-verify`.
### Sign your commits
@@ -124,64 +72,31 @@ they are signed. To set up your machine to sign commits, see [managing commit si
verification](https://docs.github.com/en/authentication/managing-commit-signature-verification/about-commit-signature-verification)
in GitHub docs.
### Configuration and build system changes
Changes to project configuration files require special consideration:
- Linting configuration (`.clippy.toml`, `rustfmt.toml`): Affects all contributors.
- CI configuration (`.github/workflows/`): Affects build and deployment.
- Build system (`xtask/`, `Cargo.toml` workspace config): Affects development workflow.
- Dependencies: Consider MSRV compatibility and licensing.
Please discuss these changes in an issue before implementing them.
### Collaborative development
We may occasionally make changes directly to your branch—such as force-pushes—to help move a PR
forward, speed up review, or ensure it meets our quality standards. If you would prefer we do not do
this, or if your workflow depends on us avoiding force-pushes (for example, if your app points to
your branch in `Cargo.toml`), please mention this in your PR description and we will respect your
preference.
## Implementation Guidelines
### Setup
TL;DR: Clone the repo and build it using `cargo xtask`.
Clone the repo and build it using [cargo-make](https://sagiegurari.github.io/cargo-make/)
Ratatui is an ordinary Rust project where common tasks are managed with
[cargo-xtask](https://github.com/matklad/cargo-xtask). It wraps common `cargo` commands with sane
[cargo-make](https://github.com/sagiegurari/cargo-make/). It wraps common `cargo` commands with sane
defaults depending on your platform of choice. Building the project should be as easy as running
`cargo xtask build`.
`cargo make build`.
```shell
git clone https://github.com/ratatui/ratatui.git
git clone https://github.com/ratatui-org/ratatui.git
cd ratatui
cargo xtask build
cargo make build
```
### Architecture
For an understanding of the crate organization and design decisions, see [ARCHITECTURE.md]. This
document explains the modular workspace structure introduced in version 0.30.0 and provides
guidance on which crate to use for different use cases.
When making changes, consider:
- Which crate should contain your changes per the modular structure,
- Whether your changes affect the public API of `ratatui-core` (requires extra care),
- And how your changes fit into the overall architecture.
[ARCHITECTURE.md]: https://github.com/ratatui/ratatui/blob/main/ARCHITECTURE.md
### Tests
The [test coverage](https://app.codecov.io/gh/ratatui/ratatui) of the crate is reasonably
The [test coverage](https://app.codecov.io/gh/ratatui-org/ratatui) of the crate is reasonably
good, but this can always be improved. Focus on keeping the tests simple and obvious and write unit
tests for all new or modified code. Beside the usual doc and unit tests, one of the most valuable
test you can write for Ratatui is a test against the `TestBackend`. It allows you to assert the
content of the output buffer that would have been flushed to the terminal after a given draw call.
See `widgets_block_renders` in [ratatui/tests/widgets_block.rs](./ratatui/tests/widgets_block.rs) for an example.
See `widgets_block_renders` in [tests/widgets_block.rs](./tests/widget_block.rs) for an example.
When writing tests, generally prefer to write unit tests and doc tests directly in the code file
being tested rather than integration tests in the `tests/` folder.
@@ -190,10 +105,6 @@ If an area that you're making a change in is not tested, write tests to characte
behavior before changing it. This helps ensure that we don't introduce bugs to existing software
using Ratatui (and helps make it easy to migrate apps still using `tui-rs`).
> [!IMPORTANT]
> Do not remove existing tests without clear justification. If tests need to be
> modified due to API changes, explain why in your PR description.
For coverage, we have two [bacon](https://dystroy.org/bacon/) jobs (one for all tests, and one for
unit tests, keyboard shortcuts `v` and `u` respectively) that run
[cargo-llvm-cov](https://github.com/taiki-e/cargo-llvm-cov) to report the coverage. Several plugins
@@ -202,89 +113,22 @@ exist to show coverage directly in your editor. E.g.:
- <https://marketplace.visualstudio.com/items?itemName=ryanluker.vscode-coverage-gutters>
- <https://github.com/alepez/vim-llvmcov>
### Documentation
Here are some guidelines for writing documentation in Ratatui.
Every public API **must** be documented.
Keep in mind that Ratatui tends to attract beginner Rust users that may not be familiar with Rust
concepts.
#### Content
The main doc comment should talk about the general features that the widget supports and introduce
the concepts pointing to the various methods. Focus on interaction with various features and giving
enough information that helps understand why you might want something.
Examples should help users understand a particular usage, not test a feature. They should be as
simple as possible. Prefer hiding imports and using wildcards to keep things concise. Some imports
may still be shown to demonstrate a particular non-obvious import (e.g. `Stylize` trait to use style
methods). Speaking of `Stylize`, you should use it over the more verbose style setters:
```rust
let style = Style::new().red().bold();
// not
let style = Style::default().fg(Color::Red).add_modifier(Modifiers::BOLD);
```
#### Format
- First line is summary, second is blank, third onward is more detail
```rust
/// Summary
///
/// A detailed description
/// with examples.
fn foo() {}
```
- Max line length is 100 characters
See [VS Code rewrap extension](https://marketplace.visualstudio.com/items?itemName=stkb.rewrap)
- Doc comments are above macros
i.e.
```rust
/// doc comment
#[derive(Debug)]
struct Foo {}
```
- Code items should be between backticks
i.e. ``[`Block`]``, **NOT** ``[Block]``
### Deprecation notice
We generally want to wait at least two versions before removing deprecated items, so users have
time to update. However, if a deprecation is blocking for us to implement a new feature we may
*consider* removing it in a one version notice.
Deprecation process:
1. Add `#[deprecated]` attribute with a clear message.
2. Update documentation to point to the replacement.
3. Add an entry to `BREAKING-CHANGES.md` if applicable.
4. Wait at least two versions before removal.
5. Consider the impact on the ecosystem before removing.
### Use of unsafe for optimization purposes
We don't currently use any unsafe code in Ratatui, and would like to keep it that way. However, there
We don't currently use any unsafe code in Ratatui, and would like to keep it that way. However there
may be specific cases that this becomes necessary in order to avoid slowness. Please see [this
discussion](https://github.com/ratatui/ratatui/discussions/66) for more about the decision.
discussion](https://github.com/ratatui-org/ratatui/discussions/66) for more about the decision.
## Continuous Integration
We use GitHub Actions for the CI where we perform the following checks:
We use Github Actions for the CI where we perform the following checks:
- The code should compile on `stable` and the Minimum Supported Rust Version (MSRV).
- The tests (docs, lib, tests and examples) should pass.
- The code should conform to the default format enforced by `rustfmt`.
- The code should not contain common style issues `clippy`.
You can also check most of those things yourself locally using `cargo xtask ci` which will offer you
You can also check most of those things yourself locally using `cargo make ci` which will offer you
a shorter feedback loop than pushing to github.
## Relationship with `tui-rs`
@@ -293,12 +137,12 @@ This project was forked from [`tui-rs`](https://github.com/fdehau/tui-rs/) in Fe
[blessing of the original author](https://github.com/fdehau/tui-rs/issues/654), Florian Dehau
([@fdehau](https://github.com/fdehau)).
The original repository contains all the issues, PRs, and discussion that were raised originally, and
The original repository contains all the issues, PRs and discussion that were raised originally, and
it is useful to refer to when contributing code, documentation, or issues with Ratatui.
We imported all the PRs from the original repository, implemented many of the smaller ones, and
We imported all the PRs from the original repository and implemented many of the smaller ones and
made notes on the leftovers. These are marked as draft PRs and labelled as [imported from
tui](https://github.com/ratatui/ratatui/pulls?q=is%3Apr+is%3Aopen+label%3A%22imported+from+tui%22).
tui](https://github.com/ratatui-org/ratatui/pulls?q=is%3Apr+is%3Aopen+label%3A%22imported+from+tui%22).
We have documented the current state of those PRs, and anyone is welcome to pick them up and
continue the work on them.

4681
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@@ -1,123 +1,162 @@
[workspace]
resolver = "2"
members = ["ratatui", "ratatui-*", "xtask", "examples/apps/*", "examples/concepts/*"]
default-members = [
"ratatui",
"ratatui-core",
"ratatui-crossterm",
# this is not included as it doesn't compile on windows
# "ratatui-termion",
"ratatui-macros",
"ratatui-termwiz",
"ratatui-widgets",
"examples/apps/*",
"examples/concepts/*",
]
[workspace.package]
[package]
name = "ratatui"
version = "0.22.0" # crate version
authors = ["Florian Dehau <work@fdehau.com>", "The Ratatui Developers"]
description = "A library to build rich terminal user interfaces or dashboards"
documentation = "https://docs.rs/ratatui/latest/ratatui/"
repository = "https://github.com/ratatui/ratatui"
homepage = "https://ratatui.rs"
keywords = ["tui", "terminal", "dashboard"]
categories = ["command-line-interface"]
repository = "https://github.com/ratatui-org/ratatui"
readme = "README.md"
license = "MIT"
exclude = ["assets/*", ".github", "Makefile.toml", "CONTRIBUTING.md", "*.log", "tags"]
edition = "2024"
rust-version = "1.86.0"
exclude = [
"assets/*",
".github",
"Makefile.toml",
"CONTRIBUTING.md",
"*.log",
"tags",
]
autoexamples = true
edition = "2021"
rust-version = "1.65.0"
[workspace.dependencies]
anstyle = "1"
bitflags = "2.10"
clap = { version = "4.5", features = ["derive"] }
color-eyre = "0.6"
compact_str = { version = "0.9", default-features = false }
criterion = { version = "0.8", features = ["html_reports"] }
crossterm = "0.29"
document-features = "0.2"
fakeit = "1"
futures = "0.3"
hashbrown = "0.16"
indoc = "2"
instability = "0.3"
itertools = { version = "0.14", default-features = false, features = ["use_alloc"] }
kasuari = { version = "0.4", default-features = false }
line-clipping = "0.3"
lru = "0.16"
octocrab = "0.49"
palette = "0.7"
pretty_assertions = "1"
rand = "0.9"
rand_chacha = "0.9"
ratatui = { path = "ratatui", version = "0.30.0" }
ratatui-core = { path = "ratatui-core", version = "0.1.0" }
ratatui-crossterm = { path = "ratatui-crossterm", version = "0.1.0" }
ratatui-macros = { path = "ratatui-macros", version = "0.7.0" }
ratatui-termion = { path = "ratatui-termion", version = "0.1.0" }
ratatui-termwiz = { path = "ratatui-termwiz", version = "0.1.0" }
ratatui-widgets = { path = "ratatui-widgets", version = "0.3.0" }
rstest = "0.26"
serde = { version = "1", features = ["derive"] }
serde_json = "1"
strum = { version = "0.27", default-features = false, features = ["derive"] }
termion = "4"
termwiz = "0.23"
thiserror = { version = "2", default-features = false }
time = { version = "0.3.37", default-features = false }
tokio = "1"
tokio-stream = "0.1"
tracing = "0.1"
tracing-appender = "0.2"
tracing-subscriber = "0.3"
trybuild = "1"
unicode-segmentation = "1"
unicode-truncate = { version = "2", default-features = false }
# See <https://github.com/ratatui/ratatui/issues/1271> for information about why we pin unicode-width
unicode-width = ">=0.2.0, <=0.2.2"
[badges]
# Improve benchmark consistency
[profile.bench]
codegen-units = 1
lto = true
[features]
default = ["crossterm"]
all-widgets = ["widget-calendar"]
widget-calendar = ["time"]
macros = []
serde = ["dep:serde", "bitflags/serde"]
[workspace.lints.rust]
unsafe_code = "forbid"
[package.metadata.docs.rs]
all-features = true
# see https://doc.rust-lang.org/nightly/rustdoc/scraped-examples.html
cargo-args = ["-Zunstable-options", "-Zrustdoc-scrape-examples"]
rustdoc-args = ["--cfg", "docsrs"]
[workspace.lints.clippy]
pedantic = { level = "warn", priority = -1 }
cast_possible_truncation = "allow"
cast_possible_wrap = "allow"
cast_precision_loss = "allow"
cast_sign_loss = "allow"
missing_errors_doc = "allow"
missing_panics_doc = "allow"
module_name_repetitions = "allow"
must_use_candidate = "allow"
[dependencies]
bitflags = "2.3"
cassowary = "0.3"
crossterm = { version = "0.26", optional = true }
indoc = "2.0"
paste = "1.0.2"
serde = { version = "1", optional = true, features = ["derive"] }
termion = { version = "2.0", optional = true }
termwiz = { version = "0.20.0", optional = true }
time = { version = "0.3.11", optional = true, features = ["local-offset"] }
unicode-segmentation = "1.10"
unicode-width = "0.1"
# we often split up a module into multiple files with the main type in a file named after the
# module, so we want to allow this pattern
module_inception = "allow"
[dev-dependencies]
anyhow = "1.0.71"
argh = "0.1"
cargo-husky = { version = "1.5.0", default-features = false, features = ["user-hooks"] }
criterion = { version = "0.5", features = ["html_reports"] }
fakeit = "1.1"
itertools = "0.10"
rand = "0.8"
# nursery or restricted
as_underscore = "warn"
deref_by_slicing = "warn"
else_if_without_else = "warn"
empty_line_after_doc_comments = "warn"
equatable_if_let = "warn"
fn_to_numeric_cast_any = "warn"
format_push_string = "warn"
implicit_clone = "warn"
map_err_ignore = "warn"
missing_const_for_fn = "warn"
mixed_read_write_in_expression = "warn"
mod_module_files = "warn"
needless_pass_by_ref_mut = "warn"
needless_raw_strings = "warn"
or_fun_call = "warn"
redundant_type_annotations = "warn"
rest_pat_in_fully_bound_structs = "warn"
string_lit_chars_any = "warn"
string_slice = "warn"
unnecessary_self_imports = "warn"
use_self = "warn"
[[bench]]
name = "paragraph"
harness = false
[[example]]
name = "barchart"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "block"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "canvas"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "calendar"
required-features = ["crossterm", "widget-calendar"]
doc-scrape-examples = true
[[example]]
name = "chart"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "custom_widget"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "demo"
# this runs for all of the terminal backends, so it can't be built using --all-features or scraped
doc-scrape-examples = false
[[example]]
name = "gauge"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "hello_world"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "layout"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "list"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "panic"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "paragraph"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "popup"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "scrollbar"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "sparkline"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "table"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "tabs"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "user_input"
required-features = ["crossterm"]
doc-scrape-examples = true
[[example]]
name = "inline"
required-features = ["crossterm"]
doc-scrape-examples = true

View File

@@ -1,7 +0,0 @@
{
"drips": {
"ethereum": {
"ownedBy": "0x6053C8984f4F214Ad12c4653F28514E1E09213B5"
}
}
}

View File

@@ -1,7 +1,7 @@
The MIT License (MIT)
Copyright (c) 2016-2022 Florian Dehau
Copyright (c) 2023-2025 The Ratatui Developers
Copyright (c) 2023 The Ratatui Developers
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal

View File

@@ -1,16 +0,0 @@
# Maintainers
This file documents current and past maintainers.
- [orhun](https://github.com/orhun)
- [joshka](https://github.com/joshka)
- [kdheepak](https://github.com/kdheepak)
- [j-g00da](https://github.com/j-g00da)
## Past Maintainers
- [fdehau](https://github.com/fdehau)
- [mindoodoo](https://github.com/mindoodoo)
- [sayanarijit](https://github.com/sayanarijit)
- [EdJoPaTo](https://github.com/EdJoPaTo)
- [Valentin271](https://github.com/Valentin271)

173
Makefile.toml Normal file
View File

@@ -0,0 +1,173 @@
# configuration for https://github.com/sagiegurari/cargo-make
[config]
skip_core_tasks = true
[env]
# all features except the backend ones
ALL_FEATURES = "all-widgets,macros,serde"
[tasks.default]
alias = "ci"
[tasks.ci]
dependencies = [
"style-check",
"clippy",
"check",
"test",
]
[tasks.style-check]
dependencies = ["fmt", "typos"]
[tasks.fmt]
toolchain = "nightly"
command = "cargo"
args = ["fmt", "--all", "--check"]
[tasks.typos]
install_crate = { crate_name = "typos-cli", binary = "typos", test_arg = "--version" }
command = "typos"
[tasks.check]
command = "cargo"
args = [
"check",
"--all-targets",
"--all-features"
]
[tasks.check.windows]
args = [
"check",
"--all-targets",
"--no-default-features", "--features", "${ALL_FEATURES},crossterm,termwiz"
]
[tasks.build]
command = "cargo"
args = [
"build",
"--all-targets",
"--all-features",
]
[tasks.build.windows]
args = [
"build",
"--all-targets",
"--no-default-features", "--features", "${ALL_FEATURES},crossterm,termwiz"
]
[tasks.clippy]
command = "cargo"
args = [
"clippy",
"--all-targets",
"--tests",
"--benches",
"--all-features",
"--",
"-D",
"warnings",
]
[tasks.clippy.windows]
args = [
"clippy",
"--all-targets",
"--tests",
"--benches",
"--no-default-features", "--features", "${ALL_FEATURES},crossterm,termwiz",
"--",
"-D",
"warnings",
]
[tasks.test]
dependencies = [
"test-doc",
]
command = "cargo"
args = [
"test",
"--all-targets",
"--all-features",
]
[tasks.test-windows]
dependencies = [
"test-doc",
]
args = [
"test",
"--all-targets",
"--no-default-features", "--features", "${ALL_FEATURES},crossterm,termwiz"
]
[tasks.test-doc]
command = "cargo"
args = [
"test", "--doc",
"--all-features",
]
[tasks.test-doc.windows]
args = [
"test", "--doc",
"--no-default-features", "--features", "${ALL_FEATURES},crossterm,termwiz"
]
[tasks.test-backend]
# takes a command line parameter to specify the backend to test (e.g. "crossterm")
command = "cargo"
args = [
"test",
"--all-targets",
"--no-default-features", "--features", "${ALL_FEATURES},${@}"
]
[tasks.coverage]
command = "cargo"
args = [
"llvm-cov",
"--lcov",
"--output-path", "target/lcov.info",
"--all-features",
]
[tasks.coverage.windows]
command = "cargo"
args = [
"llvm-cov",
"--lcov",
"--output-path", "target/lcov.info",
"--no-default-features",
"--features", "${ALL_FEATURES},crossterm,termwiz",
]
[tasks.run-example]
private = true
condition = { env_set = ["TUI_EXAMPLE_NAME"] }
command = "cargo"
args = ["run", "--release", "--example", "${TUI_EXAMPLE_NAME}", "--features", "all-widgets"]
[tasks.build-examples]
command = "cargo"
args = ["build", "--examples", "--release", "--features", "all-widgets"]
[tasks.run-examples]
dependencies = ["build-examples"]
script = '''
#!@duckscript
files = glob_array ./examples/*.rs
for file in ${files}
name = basename ${file}
name = substring ${name} -3
set_env TUI_EXAMPLE_NAME ${name}
cm_run_task run-example
end
'''

365
README.md
View File

@@ -1,182 +1,265 @@
# Ratatui
<img align="left" src="https://avatars.githubusercontent.com/u/125200832?s=128&v=4">
`ratatui` is a [Rust](https://www.rust-lang.org) library to build rich terminal user interfaces and
dashboards. It is a community fork of the original [tui-rs](https://github.com/fdehau/tui-rs)
project.
[![Crates.io](https://img.shields.io/crates/v/ratatui?logo=rust&style=flat-square)](https://crates.io/crates/ratatui)
[![License](https://img.shields.io/crates/l/ratatui?style=flat-square)](./LICENSE) [![GitHub CI
Status](https://img.shields.io/github/actions/workflow/status/ratatui-org/ratatui/ci.yml?style=flat-square&logo=github)](https://github.com/ratatui-org/ratatui/actions?query=workflow%3ACI+)
[![Docs.rs](https://img.shields.io/docsrs/ratatui?logo=rust&style=flat-square)](https://docs.rs/crate/ratatui/)
[![Dependency
Status](https://deps.rs/repo/github/ratatui-org/ratatui/status.svg?style=flat-square)](https://deps.rs/repo/github/ratatui-org/ratatui)
[![Codecov](https://img.shields.io/codecov/c/github/ratatui-org/ratatui?logo=codecov&style=flat-square&token=BAQ8SOKEST)](https://app.codecov.io/gh/ratatui-org/ratatui)
[![Discord](https://img.shields.io/discord/1070692720437383208?label=discord&logo=discord&style=flat-square)](https://discord.gg/pMCEU9hNEj)
<!-- See RELEASE.md for instructions on creating the demo gif --->
![Demo of Ratatui](https://github.com/ratatui-org/ratatui/assets/24392180/93ab0e38-93e0-4ae0-a31b-91ae6c393185)
<details>
<summary>Table of Contents</summary>
- [Quickstart](#quickstart)
- [Documentation](#documentation)
- [Templates](#templates)
- [Built with Ratatui](#built-with-ratatui)
- [Alternatives](#alternatives)
- [Contributing](#contributing)
- [Acknowledgements](#acknowledgements)
- [License](#license)
* [Ratatui](#ratatui)
* [Installation](#installation)
* [Introduction](#introduction)
* [Quickstart](#quickstart)
* [Status of this fork](#status-of-this-fork)
* [Rust version requirements](#rust-version-requirements)
* [Documentation](#documentation)
* [Examples](#examples)
* [Widgets](#widgets)
* [Built in](#built-in)
* [Third\-party libraries, bootstrapping templates and
widgets](#third-party-libraries-bootstrapping-templates-and-widgets)
* [Apps](#apps)
* [Alternatives](#alternatives)
* [Contributors](#contributors)
* [Acknowledgments](#acknowledgments)
* [License](#license)
</details>
![Release header](https://github.com/ratatui/ratatui/blob/b23480adfa9430697071c906c7ba4d4f9bd37a73/assets/release-header.png?raw=true)
## Installation
<div align="center">
```shell
cargo add ratatui --features all-widgets
```
[![Crate Badge]][Crate] [![Repo Badge]][Repo] [![Docs Badge]][Docs] [![License Badge]][License] \
[![CI Badge]][CI] [![Deps Badge]][Deps] [![Codecov Badge]][Codecov] [![Sponsors Badge]][Sponsors] \
[Ratatui Website] · [Docs] · [Widget Examples] · [App Examples] · [Changelog] \
[Breaking Changes] · [Contributing] · [Report a bug] · [Request a Feature]
Or modify your `Cargo.toml`
</div>
```toml
[dependencies]
ratatui = { version = "0.22.0", features = ["all-widgets"]}
```
[Ratatui][Ratatui Website] (_ˌræ.təˈtu.i_) is a Rust crate for cooking up terminal user interfaces
(TUIs). It provides a simple and flexible way to create text-based user interfaces in the terminal,
which can be used for command-line applications, dashboards, and other interactive console programs.
Ratatui is mostly backwards compatible with `tui-rs`. To migrate an existing project, it may be
easier to rename the ratatui dependency to `tui` rather than updating every usage of the crate.
E.g.:
```toml
[dependencies]
tui = { package = "ratatui", version = "0.22.0", features = ["all-widgets"]}
```
## Introduction
`ratatui` is a terminal UI library that supports multiple backends:
* [crossterm](https://github.com/crossterm-rs/crossterm) [default]
* [termion](https://github.com/ticki/termion)
* [termwiz](https://github.com/wez/wezterm/tree/master/termwiz)
The library is based on the principle of immediate rendering with intermediate buffers. This means
that at each new frame you should build all widgets that are supposed to be part of the UI. While
providing a great flexibility for rich and interactive UI, this may introduce overhead for highly
dynamic content. So, the implementation try to minimize the number of ansi escapes sequences
generated to draw the updated UI. In practice, given the speed of `Rust` the overhead rather comes
from the terminal emulator than the library itself.
Moreover, the library does not provide any input handling nor any event system and you may rely on
the previously cited libraries to achieve such features.
We keep a [CHANGELOG](./CHANGELOG.md) generated by [git-cliff](https://github.com/orhun/git-cliff)
utilizing [Conventional Commits](https://www.conventionalcommits.org/).
## Quickstart
Ratatui has [templates] available to help you get started quickly. You can use the
[`cargo-generate`] command to create a new project with Ratatui:
```shell
cargo install --locked cargo-generate
cargo generate ratatui/templates
```
Selecting the Hello World template produces the following application:
The following example demonstrates the minimal amount of code necessary to setup a terminal and
render "Hello World!". The full code for this example which contains a little more detail is in
[hello_world.rs](./examples/hello_world.rs). For more guidance on how to create Ratatui apps, see
the [Docs](https://docs.rs/ratatui) and [Examples](#examples). There is also a starter template
available at [rust-tui-template](https://github.com/ratatui-org/rust-tui-template).
```rust
use color_eyre::Result;
use crossterm::event::{self, Event};
use ratatui::{DefaultTerminal, Frame};
fn main() -> Result<()> {
color_eyre::install()?;
let terminal = ratatui::init();
let result = run(terminal);
ratatui::restore();
result
fn main() -> Result<(), Box<dyn Error>> {
let mut terminal = setup_terminal()?;
run(&mut terminal)?;
restore_terminal(&mut terminal)?;
Ok(())
}
fn run(mut terminal: DefaultTerminal) -> Result<()> {
loop {
terminal.draw(render)?;
if matches!(event::read()?, Event::Key(_)) {
break Ok(());
fn setup_terminal() -> Result<Terminal<CrosstermBackend<Stdout>>, Box<dyn Error>> {
let mut stdout = io::stdout();
enable_raw_mode()?;
execute!(stdout, EnterAlternateScreen)?;
Ok(Terminal::new(CrosstermBackend::new(stdout))?)
}
fn restore_terminal(
terminal: &mut Terminal<CrosstermBackend<Stdout>>,
) -> Result<(), Box<dyn Error>> {
disable_raw_mode()?;
execute!(terminal.backend_mut(), LeaveAlternateScreen,)?;
Ok(terminal.show_cursor()?)
}
fn run(terminal: &mut Terminal<CrosstermBackend<Stdout>>) -> Result<(), Box<dyn Error>> {
Ok(loop {
terminal.draw(|frame| {
let greeting = Paragraph::new("Hello World!");
frame.render_widget(greeting, frame.size());
})?;
if event::poll(Duration::from_millis(250))? {
if let Event::Key(key) = event::read()? {
if KeyCode::Char('q') == key.code {
break;
}
}
}
}
}
fn render(frame: &mut Frame) {
frame.render_widget("hello world", frame.area());
})
}
```
## Status of this fork
In response to the original maintainer [**Florian Dehau**](https://github.com/fdehau)'s issue
regarding the [future of `tui-rs`](https://github.com/fdehau/tui-rs/issues/654), several members of
the community forked the project and created this crate. We look forward to continuing the work
started by Florian 🚀
In order to organize ourselves, we currently use a [Discord server](https://discord.gg/pMCEU9hNEj),
feel free to join and come chat! There are also plans to implement a [Matrix](https://matrix.org/)
bridge in the near future. **Discord is not a MUST to contribute**. We follow a pretty standard
github centered open source workflow keeping the most important conversations on GitHub, open an
issue or PR and it will be addressed. 😄
Please make sure you read the updated [contributing](./CONTRIBUTING.md) guidelines, especially if
you are interested in working on a PR or issue opened in the previous repository.
## Rust version requirements
Since version 0.21.0, The Minimum Supported Rust Version (MSRV) of `ratatui` is 1.65.0.
## Documentation
- [Docs] - the full API documentation for the library on docs.rs.
- [Ratatui Website] - explains the library's concepts and provides step-by-step tutorials.
- [Ratatui Forum] - a place to ask questions and discuss the library.
- [Widget Examples] - a collection of examples that demonstrate how to use the library.
- [App Examples] - a collection of more complex examples that demonstrate how to build apps.
- [ARCHITECTURE.md] - explains the crate organization and modular workspace structure.
- [Changelog] - generated by [git-cliff] utilizing [Conventional Commits].
- [Breaking Changes] - a list of breaking changes in the library.
The documentation can be found on [docs.rs.](https://docs.rs/ratatui)
You can also watch the [EuroRust 2024 talk] to learn about common concepts in Ratatui and what's
possible to build with it.
## Examples
## Templates
If you're looking to get started quickly, you can use one of the available templates from the
[templates] repository using [`cargo-generate`]:
The demo shown in the gif above is available on all available backends.
```shell
cargo generate ratatui/templates
# crossterm
cargo run --example demo
# termion
cargo run --example demo --no-default-features --features=termion
# termwiz
cargo run --example demo --no-default-features --features=termwiz
```
## Built with Ratatui
The UI code for this is in [examples/demo/ui.rs](./examples/demo/ui.rs) while the application state
is in [examples/demo/app.rs](./examples/demo/app.rs).
[![Awesome](https://awesome.re/badge-flat2.svg)][awesome-ratatui]
If the user interface contains glyphs that are not displayed correctly by your terminal, you may
want to run the demo without those symbols:
Check out the [showcase] section of the website, or the [awesome-ratatui] repository for a curated
list of awesome apps and libraries built with Ratatui!
```shell
cargo run --example demo --release -- --tick-rate 200 --enhanced-graphics false
```
More examples are available in the [examples](./examples/) folder.
## Widgets
### Built in
The library comes with the following
[widgets](https://docs.rs/ratatui/latest/ratatui/widgets/index.html):
* [BarChart](https://docs.rs/ratatui/latest/ratatui/widgets/struct.BarChart.html)
* [Block](https://docs.rs/ratatui/latest/ratatui/widgets/block/struct.Block.html)
* [Calendar](https://docs.rs/ratatui/latest/ratatui/widgets/calendar/index.html)
* [Canvas](https://docs.rs/ratatui/latest/ratatui/widgets/canvas/struct.Canvas.html) which allows
rendering [points, lines, shapes and a world
map](https://docs.rs/ratatui/latest/ratatui/widgets/canvas/index.html)
* [Chart](https://docs.rs/ratatui/latest/ratatui/widgets/struct.Chart.html)
* [Clear](https://docs.rs/ratatui/latest/ratatui/widgets/struct.Clear.html)
* [Gauge](https://docs.rs/ratatui/latest/ratatui/widgets/struct.Gauge.html)
* [List](https://docs.rs/ratatui/latest/ratatui/widgets/struct.List.html)
* [Paragraph](https://docs.rs/ratatui/latest/ratatui/widgets/struct.Paragraph.html)
* [Scrollbar](https://docs.rs/ratatui/latest/ratatui/widgets/scrollbar/struct.Scrollbar.html)
* [Sparkline](https://docs.rs/ratatui/latest/ratatui/widgets/struct.Sparkline.html)
* [Table](https://docs.rs/ratatui/latest/ratatui/widgets/struct.Table.html)
* [Tabs](https://docs.rs/ratatui/latest/ratatui/widgets/struct.Tabs.html)
Each widget has an associated example which can be found in the [examples](./examples/) folder. Run
each examples with cargo (e.g. to run the gauge example `cargo run --example gauge`), and quit by
pressing `q`.
You can also run all examples by running `cargo make run-examples` (requires `cargo-make` that can
be installed with `cargo install cargo-make`).
### Third-party libraries, bootstrapping templates and widgets
* [ansi-to-tui](https://github.com/uttarayan21/ansi-to-tui) — Convert ansi colored text to
`tui::text::Text`
* [color-to-tui](https://github.com/uttarayan21/color-to-tui) — Parse hex colors to
`tui::style::Color`
* [rust-tui-template](https://github.com/ratatui-org/rust-tui-template) — A template for bootstrapping a
Rust TUI application with Tui-rs & crossterm
* [simple-tui-rs](https://github.com/pmsanford/simple-tui-rs) — A simple example tui-rs app
* [tui-builder](https://github.com/jkelleyrtp/tui-builder) — Batteries-included MVC framework for
Tui-rs + Crossterm apps
* [tui-clap](https://github.com/kegesch/tui-clap-rs) — Use clap-rs together with Tui-rs
* [tui-log](https://github.com/kegesch/tui-log-rs) — Example of how to use logging with Tui-rs
* [tui-logger](https://github.com/gin66/tui-logger) — Logger and Widget for Tui-rs
* [tui-realm](https://github.com/veeso/tui-realm) — Tui-rs framework to build stateful applications
with a React/Elm inspired approach
* [tui-realm-treeview](https://github.com/veeso/tui-realm-treeview) — Treeview component for
Tui-realm
* [tui-rs-tree-widgets](https://github.com/EdJoPaTo/tui-rs-tree-widget): Widget for tree data
structures.
* [tui-windows](https://github.com/markatk/tui-windows-rs) — Tui-rs abstraction to handle multiple
windows and their rendering
* [tui-textarea](https://github.com/rhysd/tui-textarea): Simple yet powerful multi-line text editor
widget supporting several key shortcuts, undo/redo, text search, etc.
* [tui-input](https://github.com/sayanarijit/tui-input): TUI input library supporting multiple
backends and tui-rs.
* [tui-term](https://github.com/a-kenji/tui-term): A pseudoterminal widget library
that enables the rendering of terminal applications as ratatui widgets.
## Apps
Check out the list of more than 50 [Apps using
`Ratatui`](https://github.com/ratatui-org/ratatui/wiki/Apps-using-Ratatui)!
## Alternatives
- [Cursive](https://crates.io/crates/cursive) - a ncurses-based TUI library.
- [iocraft](https://crates.io/crates/iocraft) - a declarative TUI library.
You might want to checkout [Cursive](https://github.com/gyscos/Cursive) for an alternative solution
to build text user interfaces in Rust.
## Contributing
## Contributors
[![Discord Badge]][Discord Server] [![Matrix Badge]][Matrix] [![Forum Badge]][Ratatui Forum]
[![GitHub
Contributors](https://contrib.rocks/image?repo=ratatui-org/ratatui)](https://github.com/ratatui-org/ratatui/graphs/contributors)
Feel free to join our [Discord server](https://discord.gg/pMCEU9hNEj) for discussions and questions!
There is also a [Matrix](https://matrix.org/) bridge available at
[#ratatui:matrix.org](https://matrix.to/#/#ratatui:matrix.org). We have also recently launched the
[Ratatui Forum].
## Acknowledgments
We rely on GitHub for [bugs][Report a bug] and [feature requests][Request a Feature].
Please make sure you read the [contributing](./CONTRIBUTING.md) guidelines before [creating a pull
request][Create a Pull Request]. We accept AI generated code, but please read the [AI Contributions]
guidelines to ensure compliance.
If you'd like to show your support, you can add the Ratatui badge to your project's README:
```md
[![Built With Ratatui](https://img.shields.io/badge/Built_With_Ratatui-000?logo=ratatui&logoColor=fff)](https://ratatui.rs/)
```
[![Built With Ratatui](https://img.shields.io/badge/Built_With_Ratatui-000?logo=ratatui&logoColor=fff)](https://ratatui.rs/)
## Acknowledgements
Ratatui was forked from the [tui-rs] crate in 2023 in order to continue its development. None of
this could be possible without [Florian Dehau] who originally created [tui-rs] which inspired many
Rust TUIs.
Special thanks to [Pavel Fomchenkov] for his work in designing an awesome logo for the Ratatui
project and organization.
Special thanks to [**Pavel Fomchenkov**](https://github.com/nawok) for his work in designing **an
awesome logo** for the ratatui project and ratatui-org organization.
## License
This project is licensed under the [MIT License][License].
[Repo]: https://github.com/ratatui/ratatui
[Ratatui Website]: https://ratatui.rs/
[Ratatui Forum]: https://forum.ratatui.rs
[Docs]: https://docs.rs/ratatui
[Widget Examples]: https://github.com/ratatui/ratatui/tree/main/ratatui-widgets/examples
[App Examples]: https://github.com/ratatui/ratatui/tree/main/examples
[ARCHITECTURE.md]: https://github.com/ratatui/ratatui/blob/main/ARCHITECTURE.md
[Changelog]: https://github.com/ratatui/ratatui/blob/main/CHANGELOG.md
[git-cliff]: https://git-cliff.org
[Conventional Commits]: https://www.conventionalcommits.org
[Breaking Changes]: https://github.com/ratatui/ratatui/blob/main/BREAKING-CHANGES.md
[EuroRust 2024 talk]: https://www.youtube.com/watch?v=hWG51Mc1DlM
[Report a bug]: https://github.com/ratatui/ratatui/issues/new?labels=bug&projects=&template=bug_report.md
[Request a Feature]: https://github.com/ratatui/ratatui/issues/new?labels=enhancement&projects=&template=feature_request.md
[Create a Pull Request]: https://github.com/ratatui/ratatui/compare
[Contributing]: https://github.com/ratatui/ratatui/blob/main/CONTRIBUTING.md
[AI Contributions]: https://github.com/ratatui/ratatui/blob/main/CONTRIBUTING.md#ai-generated-content
[Crate]: https://crates.io/crates/ratatui
[tui-rs]: https://crates.io/crates/tui
[Sponsors]: https://github.com/sponsors/ratatui
[Crate Badge]: https://img.shields.io/crates/v/ratatui?logo=rust&style=flat-square&color=E05D44
[Repo Badge]: https://img.shields.io/badge/repo-ratatui/ratatui-1370D3?style=flat-square&logo=github
[License Badge]: https://img.shields.io/crates/l/ratatui?style=flat-square&color=1370D3
[CI Badge]: https://img.shields.io/github/actions/workflow/status/ratatui/ratatui/ci.yml?style=flat-square&logo=github
[CI]: https://github.com/ratatui/ratatui/actions/workflows/ci.yml
[Codecov Badge]: https://img.shields.io/codecov/c/github/ratatui/ratatui?logo=codecov&style=flat-square&token=BAQ8SOKEST&color=C43AC3
[Codecov]: https://app.codecov.io/gh/ratatui/ratatui
[Deps Badge]: https://deps.rs/repo/github/ratatui/ratatui/status.svg?path=ratatui&style=flat-square
[Deps]: https://deps.rs/repo/github/ratatui/ratatui?path=ratatui
[Discord Badge]: https://img.shields.io/discord/1070692720437383208?label=discord&logo=discord&style=flat-square&color=1370D3&logoColor=1370D3
[Discord Server]: https://discord.gg/pMCEU9hNEj
[Docs Badge]: https://img.shields.io/badge/docs-ratatui-1370D3?style=flat-square&logo=rust
[Matrix Badge]: https://img.shields.io/matrix/ratatui-general%3Amatrix.org?style=flat-square&logo=matrix&label=Matrix&color=C43AC3
[Matrix]: https://matrix.to/#/#ratatui:matrix.org
[Forum Badge]: https://img.shields.io/discourse/likes?server=https%3A%2F%2Fforum.ratatui.rs&style=flat-square&logo=discourse&label=forum&color=C43AC3
[Sponsors Badge]: https://img.shields.io/github/sponsors/ratatui?logo=github&style=flat-square&color=1370D3
[templates]: https://github.com/ratatui/templates/
[showcase]: https://ratatui.rs/showcase/
[awesome-ratatui]: https://github.com/ratatui/awesome-ratatui
[Pavel Fomchenkov]: https://github.com/nawok
[Florian Dehau]: https://github.com/fdehau
[`cargo-generate`]: https://crates.io/crates/cargo-generate
[License]: ./LICENSE
[MIT](./LICENSE)

View File

@@ -1,51 +1,30 @@
# Creating a Release
Our release strategy is:
> Release major versions with detailed summaries when necessary, while releasing minor versions
> weekly or as needed without extensive announcements.
>
> Versioning scheme being `0.x.y`, where `x` is the major version and `y` is the minor version.
[crates.io](https://crates.io/crates/ratatui) releases are automated via [GitHub
actions](.github/workflows/cd.yml) and triggered by pushing a tag.
1. Record a new demo gif if necessary. The preferred tool for this is
[vhs](https://github.com/charmbracelet/vhs) (installation instructions in README).
1. Record a new demo gif. The preferred tool for this is [ttyrec](http://0xcc.net/ttyrec/) and
[ttygif](https://github.com/icholy/ttygif). [Asciinema](https://asciinema.org/) handles block
character height poorly, [termanilizer](https://www.terminalizer.com/) takes forever to render,
[vhs](https://github.com/charmbracelet/vhs) handles braille
characters poorly (though if <https://github.com/charmbracelet/vhs/issues/322> is fixed, then
it's probably the best option).
```shell
cargo build --example demo2
vhs examples/demo2.tape
cargo build --example demo
ttyrec -e 'cargo --quiet run --release --example demo -- --tick-rate 100' demo.rec
ttygif demo.rec
```
1. Switch branches to the images branch and copy demo2.gif to examples/, commit, and push.
1. Grab the permalink from <https://github.com/ratatui/ratatui/blob/images/examples/demo2.gif> and
append `?raw=true` to redirect to the actual image url. Then update the link in the main README.
Avoid adding the gif to the git repo as binary files tend to bloat repositories.
Then upload it somewhere (e.g. use `vhs publish tty.gif` to publish it or upload it to a GitHub
wiki page as an attachment). Avoid adding the gif to the git repo as binary files tend to bloat
repositories.
1. Bump the version in [Cargo.toml](Cargo.toml).
1. Ensure [CHANGELOG.md](CHANGELOG.md) is updated. [git-cliff](https://github.com/orhun/git-cliff)
can be used for generating the entries.
1. Ensure that any breaking changes are documented in [BREAKING-CHANGES.md](./BREAKING-CHANGES.md)
1. Commit and push the changes.
1. Create a new tag: `git tag -a v[0.x.y]`
1. Create a new tag: `git tag -a v[X.Y.Z]`
1. Push the tag: `git push --tags`
1. Wait for [Continuous Deployment](https://github.com/ratatui/ratatui/actions) workflow to
1. Wait for [Continuous Deployment](https://github.com/ratatui-org/ratatui/actions) workflow to
finish.
## Alpha Releases
Alpha releases are automatically released every Saturday via [cd.yml](./.github/workflows/cd.yml)
and can be manually created when necessary by triggering the [Continuous
Deployment](https://github.com/ratatui/ratatui/actions/workflows/cd.yml) workflow.
We automatically release an alpha release with a patch level bump + alpha.num weekly (and when we
need to manually). E.g. the last release was 0.22.0, and the most recent alpha release is
0.22.1-alpha.1.
These releases will have whatever happened to be in main at the time of release, so they're useful
for apps that need to get releases from crates.io, but may contain more bugs and be generally less
tested than normal releases.
See [#147](https://github.com/ratatui/ratatui/issues/147) and
[#359](https://github.com/ratatui/ratatui/pull/359) for more info on the alpha release process.

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@@ -1,9 +0,0 @@
# Security Policy
## Supported Versions
We only support the latest version of this crate.
## Reporting a Vulnerability
To report secuirity vulnerability, please use the form at <https://github.com/ratatui/ratatui/security/advisories/new>

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@@ -8,87 +8,93 @@
default_job = "check"
[jobs.check]
command = ["cargo", "xtask", "check"]
command = ["cargo", "check", "--all-features", "--color", "always"]
need_stdout = false
[jobs.check-all]
command = ["cargo", "xtask", "check", "--all-features"]
command = ["cargo", "check", "--all-targets", "--all-features", "--color", "always"]
need_stdout = false
[jobs.check-crossterm]
command = ["cargo", "xtask", "check-backend", "crossterm"]
command = ["cargo", "check", "--color", "always", "--all-targets", "--no-default-features", "--features", "crossterm"]
need_stdout = false
[jobs.check-termion]
command = ["cargo", "xtask", "check-backend", "termion"]
command = ["cargo", "check", "--color", "always", "--all-targets", "--no-default-features", "--features", "termion"]
need_stdout = false
[jobs.check-termwiz]
command = ["cargo", "xtask", "check-backend", "termwiz"]
command = ["cargo", "check", "--color", "always", "--all-targets", "--no-default-features", "--features", "termwiz"]
need_stdout = false
[jobs.clippy-all]
command = ["cargo", "xtask", "clippy"]
[jobs.clippy]
command = [
"cargo", "clippy",
"--all-targets",
"--color", "always",
]
need_stdout = false
[jobs.test]
command = ["cargo", "xtask", "test"]
need_stdout = true
[jobs.test-unit]
command = ["cargo", "xtask", "test-libs"]
command = [
"cargo", "test",
"--all-features",
"--color", "always",
"--", "--color", "always", # see https://github.com/Canop/bacon/issues/124
]
need_stdout = true
[jobs.doc]
command = ["cargo", "xtask", "docs"]
command = [
"cargo", "+nightly", "doc",
"-Zunstable-options", "-Zrustdoc-scrape-examples",
"--all-features",
"--color", "always",
"--no-deps",
]
env.RUSTDOCFLAGS = "--cfg docsrs"
need_stdout = false
# If the doc compiles, then it opens in your browser and bacon switches
# to the previous job
[jobs.doc-open]
command = ["cargo", "xtask", "docs", "--open"]
on_success = "job:doc"
command = [
"cargo", "+nightly", "doc",
"-Zunstable-options", "-Zrustdoc-scrape-examples",
"--all-features",
"--color", "always",
"--no-deps",
"--open",
]
env.RUSTDOCFLAGS = "--cfg docsrs"
need_stdout = false
on_success = "job:doc" # so that we don't open the browser at each change
[jobs.coverage]
command = ["cargo", "xtask", "coverage"]
command = [
"cargo", "llvm-cov",
"--lcov", "--output-path", "target/lcov.info",
"--all-features",
"--color", "always",
]
[jobs.coverage-unit-tests-only]
command = ["cargo", "xtask", "coverage", "--lib"]
[jobs.hack]
command = ["cargo", "xtask", "hack"]
[jobs.format]
command = ["cargo", "xtask", "format"]
[jobs.zizmor-offline]
# zizmor checks the workflow files for security issues. The offline version is generally faster, but
# checks for fewer issues.
command = ["zizmor", "--color", "always", ".github/workflows", "--offline"]
need_stdout = true
default_watch = false
watch = [".github/workflows/"]
[jobs.zizmor-online]
# zizmor checks the workflow files for security issues. The online version is a bit slower, but it
# checks for more issues
command = ["zizmor", "--color", "always", ".github/workflows"]
need_stdout = true
default_watch = false
watch = [".github/workflows/"]
command = [
"cargo", "llvm-cov",
"--lcov", "--output-path", "target/lcov.info",
"--lib",
"--all-features",
"--color", "always",
]
# You may define here keybindings that would be specific to
# a project, for example a shortcut to launch a specific job.
# Shortcuts to internal functions (scrolling, toggling, etc.)
# should go in your personal global prefs.toml file instead.
[keybindings]
ctrl-h = "job:hack"
# alt-m = "job:my-job"
ctrl-c = "job:check-crossterm"
ctrl-t = "job:check-termion"
ctrl-w = "job:check-termwiz"
v = "job:coverage"
ctrl-v = "job:coverage-unit-tests-only"
u = "job:test-unit"
n = "job:nextest"
f = "job:format"
z = "job:zizmor-offline"
shift-z = "job:zizmor-online"
u = "job:coverage-unit-tests-only"

View File

@@ -1,30 +1,29 @@
use std::hint::black_box;
use criterion::{BatchSize, Bencher, BenchmarkId, Criterion, criterion_group};
use ratatui::buffer::Buffer;
use ratatui::layout::Rect;
use ratatui::widgets::{Paragraph, Widget, Wrap};
use criterion::{black_box, criterion_group, criterion_main, Bencher, BenchmarkId, Criterion};
use ratatui::{
buffer::Buffer,
layout::Rect,
widgets::{Paragraph, Widget, Wrap},
};
/// because the scroll offset is a u16, the maximum number of lines that can be scrolled is 65535.
/// This is a limitation of the current implementation and may be fixed by changing the type of the
/// scroll offset to a u32.
const MAX_SCROLL_OFFSET: u16 = u16::MAX;
const NO_WRAP_WIDTH: u16 = 200;
const WRAP_WIDTH: u16 = 100;
const PARAGRAPH_DEFAULT_HEIGHT: u16 = 50;
/// Benchmark for rendering a paragraph with a given number of lines. The design of this benchmark
/// allows comparison of the performance of rendering a paragraph with different numbers of lines.
/// as well as comparing with the various settings on the scroll and wrap features.
fn paragraph(c: &mut Criterion) {
pub fn paragraph(c: &mut Criterion) {
let mut group = c.benchmark_group("paragraph");
for line_count in [64, 2048, u16::MAX] {
for &line_count in [64, 2048, MAX_SCROLL_OFFSET].iter() {
let lines = random_lines(line_count);
let lines = lines.as_str();
let y_scroll = line_count - PARAGRAPH_DEFAULT_HEIGHT;
// benchmark that measures the overhead of creating a paragraph separately from rendering
group.bench_with_input(BenchmarkId::new("new", line_count), lines, |b, lines| {
b.iter(|| Paragraph::new(black_box(lines)));
b.iter(|| Paragraph::new(black_box(lines)))
});
// render the paragraph with no scroll
@@ -37,14 +36,14 @@ fn paragraph(c: &mut Criterion) {
// scroll the paragraph by half the number of lines and render
group.bench_with_input(
BenchmarkId::new("render_scroll_half", line_count),
&Paragraph::new(lines).scroll((y_scroll / 2, 0)),
&Paragraph::new(lines).scroll((0u16, line_count / 2)),
|bencher, paragraph| render(bencher, paragraph, NO_WRAP_WIDTH),
);
// scroll the paragraph by the full number of lines and render
group.bench_with_input(
BenchmarkId::new("render_scroll_full", line_count),
&Paragraph::new(lines).scroll((y_scroll, 0)),
&Paragraph::new(lines).scroll((0u16, line_count)),
|bencher, paragraph| render(bencher, paragraph, NO_WRAP_WIDTH),
);
@@ -60,25 +59,19 @@ fn paragraph(c: &mut Criterion) {
BenchmarkId::new("render_wrap_scroll_full", line_count),
&Paragraph::new(lines)
.wrap(Wrap { trim: false })
.scroll((y_scroll, 0)),
.scroll((0u16, line_count)),
|bencher, paragraph| render(bencher, paragraph, WRAP_WIDTH),
);
}
group.finish();
}
/// Render the paragraph into a buffer with the given width.
/// render the paragraph into a buffer with the given width
fn render(bencher: &mut Bencher, paragraph: &Paragraph, width: u16) {
let mut buffer = Buffer::empty(Rect::new(0, 0, width, PARAGRAPH_DEFAULT_HEIGHT));
// We use `iter_batched` to clone the value in the setup function.
// See https://github.com/ratatui/ratatui/pull/377.
bencher.iter_batched(
|| paragraph.to_owned(),
|bench_paragraph| {
bench_paragraph.render(buffer.area, &mut buffer);
},
BatchSize::LargeInput,
);
let mut buffer = Buffer::empty(Rect::new(0, 0, width, 50));
bencher.iter(|| {
paragraph.clone().render(buffer.area, &mut buffer);
})
}
/// Create a string with the given number of lines filled with nonsense words
@@ -86,10 +79,11 @@ fn render(bencher: &mut Bencher, paragraph: &Paragraph, width: u16) {
/// English language has about 5.1 average characters per word so including the space between words
/// this should emit around 200 characters per paragraph on average.
fn random_lines(count: u16) -> String {
let count = i64::from(count);
let count = count as i64;
let sentence_count = 3;
let word_count = 11;
fakeit::words::paragraph(count, sentence_count, word_count, "\n".into())
}
criterion_group!(benches, paragraph);
criterion_main!(benches);

View File

@@ -1,106 +1,41 @@
# git-cliff ~ configuration file
# https://git-cliff.org/docs/configuration
[remote.github]
owner = "ratatui"
repo = "ratatui"
# configuration for https://github.com/orhun/git-cliff
[changelog]
# changelog header
header = """
# Changelog
All notable changes to this project will be documented in this file.
<!-- ignore lint rules that are often triggered by content generated from commits / git-cliff -->
<!-- markdownlint-disable line-length no-bare-urls ul-style emphasis-style -->
# Changelog\n
All notable changes to this project will be documented in this file.\n
"""
# template for the changelog body
# https://keats.github.io/tera/docs/#introduction
# note that the - before / after the % controls whether whitespace is rendered between each line.
# Getting this right so that the markdown renders with the correct number of lines between headings
# code fences and list items is pretty finicky. Note also that the 4 backticks in the commit macro
# is intentional as this escapes any backticks in the commit body.
# https://tera.netlify.app/docs/#introduction
body = """
{%- if not version %}
## [unreleased]
{% else -%}
{%- if package -%} {# release-plz specific variable #}
## {{ package }} - [{{ version }}]({{ release_link }}) - {{ timestamp | date(format="%Y-%m-%d") }}
{%- else -%}
## [{{ version }}]({{ self::remote_url() }}/releases/tag/{{ version }}) - {{ timestamp | date(format="%Y-%m-%d") }}
{%- endif %}
{% endif -%}
{% macro commit(commit) -%}
- [{{ commit.id | truncate(length=7, end="") }}]({{ "https://github.com/ratatui/ratatui/commit/" ~ commit.id }}) \
*({{commit.scope | default(value = "uncategorized") | lower }})* {{ commit.message | upper_first | trim }}\
{% if commit.remote.username %} by `@{{ commit.remote.username }}`{%- endif -%}\
{% if commit.remote.pr_number %} in [#{{ commit.remote.pr_number }}]({{ self::remote_url() }}/pull/{{ commit.remote.pr_number }}){%- endif %}\
{%- if commit.breaking %} [**breaking**]{% endif %}
{%- if commit.body %}\n\n{{ commit.body | indent(prefix=" > ", first=true, blank=true) }}
{%- endif %}
{%- for footer in commit.footers %}\n
{%- if footer.token != "Signed-off-by" and footer.token != "Co-authored-by" %}
>
{{ footer.token | indent(prefix=" > ", first=true, blank=true) }}
{{- footer.separator }}
{{- footer.value| indent(prefix=" > ", first=false, blank=true) }}
{%- endif %}
{%- endfor %}
{% endmacro -%}
{% if version %}\
## {{ version }} - {{ timestamp | date(format="%Y-%m-%d") }}
{% else %}\
## [unreleased]
{% endif %}\
{% for group, commits in commits | group_by(attribute="group") %}
### {{ group | striptags | trim | upper_first }}
{% for commit in commits | filter(attribute="scope") | sort(attribute="scope") %}
{{ self::commit(commit=commit) }}
{%- endfor -%}
{% for commit in commits %}
{%- if not commit.scope %}
{{ self::commit(commit=commit) }}
{%- endif -%}
{%- endfor -%}
{%- endfor %}
{%- if not release_link -%}
{% if github.contributors | filter(attribute="is_first_time", value=true) | length != 0 %}
### New Contributors
{%- endif %}\
{% for contributor in github.contributors | filter(attribute="is_first_time", value=true) %}
* @{{ contributor.username }} made their first contribution
{%- if contributor.pr_number %} in \
[#{{ contributor.pr_number }}]({{ self::remote_url() }}/pull/{{ contributor.pr_number }}) \
{%- endif %}
{%- endfor -%}
{%- endif -%}
{% if version %}
{% if previous.version %}
{%- if release_link -%}
**Full Changelog**: {{ release_link }} {# release-plz specific variable #}
{%- else -%}
**Full Changelog**: {{ self::remote_url() }}/compare/{{ previous.version }}...{{ version }}
{% endif %}
{% endif %}
{% else -%}
{% raw %}\n{% endraw %}
{% endif %}
{%- macro remote_url() -%}
{%- if remote.owner -%} {# release-plz specific variable #}
https://github.com/{{ remote.owner }}/{{ remote.repo }}\
{%- else -%}
https://github.com/{{ remote.github.owner }}/{{ remote.github.repo }}\
{%- endif -%}
{% endmacro %}
### {{ group | striptags | trim | upper_first }}
{% for commit in commits
| filter(attribute="scope")
| sort(attribute="scope") %}
- *({{commit.scope}})* {{ commit.message | upper_first }}{% if commit.breaking %} [**breaking**]{% endif %}
{%- endfor -%}
{% raw %}\n{% endraw %}\
{%- for commit in commits %}
{%- if commit.scope -%}
{% else -%}
- *(uncategorized)* {{ commit.message | upper_first }}{% if commit.breaking %} [**breaking**]{% endif %}
{% endif -%}
{% endfor -%}
{% endfor %}\n
"""
# remove the leading and trailing whitespace from the template
trim = false
# postprocessors for the changelog body
postprocessors = [
{ pattern = '<!-- Please read CONTRIBUTING.md before submitting any pull request. -->', replace = "" },
{ pattern = '>---+\n', replace = '' },
{ pattern = ' +\n', replace = "\n" },
]
trim = true
# changelog footer
footer = """
<!-- generated by git-cliff -->
"""
[git]
# parse the commits based on https://www.conventionalcommits.org
@@ -111,51 +46,30 @@ filter_unconventional = true
split_commits = false
# regex for preprocessing the commit messages
commit_preprocessors = [
{ pattern = '\((\w+\s)?#([0-9]+)\)', replace = "" },
{ pattern = '(better safe shared layout cache)', replace = "perf(layout): ${1}" },
{ pattern = '(Clarify README.md)', replace = "docs(readme): ${1}" },
{ pattern = '(Update README.md)', replace = "docs(readme): ${1}" },
{ pattern = '(fix typos|Fix typos)', replace = "fix: ${1}" },
# Typos that squeaked through and which would otherwise trigger the typos linter.
# Regex obsfucation is to avoid triggering the linter in this file until there's a per file config
# See https://github.com/crate-ci/typos/issues/724
{ pattern = '\<[d]eatil\>', replace = "detail" },
{ pattern = '\<[f]eatuers\>', replace = "features" },
{ pattern = '\<[s]pecically\>', replace = "specially" },
{ pattern = '\<[g]ague\>', replace = "gauge" },
{ pattern = '\<[a]rithmentic\>', replace = "arithmetic" },
{ pattern = '\<[i]ntructions\>', replace = "instructions" },
{ pattern = '\<[i]mplementated\>', replace = "implemented" },
{ pattern = '\((\w+\s)?#([0-9]+)\)', replace = "([#${2}](https://github.com/ratatui-org/ratatui/issues/${2}))" },
{ pattern = '(better safe shared layout cache)', replace = "perf(layout): ${1}" },
{ pattern = '(Clarify README.md)', replace = "docs(readme): ${1}" },
{ pattern = '(Update README.md)', replace = "docs(readme): ${1}" },
{ pattern = '(fix typos|Fix typos)', replace = "fix: ${1}" },
]
# regex for parsing and grouping commits
commit_parsers = [
# release-plz adds 000000 as a placeholder for release commits
{ field = "id", pattern = "0000000", skip = true },
{ message = "^feat", group = "<!-- 00 -->Features" },
{ message = "^[fF]ix", group = "<!-- 01 -->Bug Fixes" },
{ message = "^refactor", group = "<!-- 02 -->Refactor" },
{ message = "^doc", group = "<!-- 03 -->Documentation" },
{ message = "^perf", group = "<!-- 04 -->Performance" },
{ message = "^style", group = "<!-- 05 -->Styling" },
{ message = "^test", group = "<!-- 06 -->Testing" },
{ message = "^chore\\(release\\): prepare for", skip = true },
{ message = "^chore: release", skip = true },
{ message = "^chore\\(pr\\)", skip = true },
{ message = "^chore\\(pull\\)", skip = true },
{ message = "^chore\\(deps\\)", skip = true },
{ message = "^chore\\(changelog\\)", skip = true },
{ message = "^[cC]hore", group = "<!-- 07 -->Miscellaneous Tasks" },
{ message = "^build\\(deps\\)", skip = true },
{ message = "^build\\(release\\)", skip = true },
{ message = "^build", group = "<!-- 08 -->Build" },
{ body = ".*security", group = "<!-- 09 -->Security" },
{ message = "^ci", group = "<!-- 10 -->Continuous Integration" },
{ message = "^revert", group = "<!-- 11 -->Reverted Commits" },
# handle some old commits styles from pre 0.4
{ message = "^(Buffer|buffer|Frame|frame|Gauge|gauge|Paragraph|paragraph):", group = "<!-- 07 -->Miscellaneous Tasks" },
{ message = "^\\[", group = "<!-- 07 -->Miscellaneous Tasks" },
{ message = "^feat", group = "<!-- 00 -->Features" },
{ message = "^[fF]ix", group = "<!-- 01 -->Bug Fixes" },
{ message = "^refactor", group = "<!-- 02 -->Refactor" },
{ message = "^doc", group = "<!-- 03 -->Documentation" },
{ message = "^perf", group = "<!-- 04 -->Performance" },
{ message = "^style", group = "<!-- 05 -->Styling" },
{ message = "^test", group = "<!-- 06 -->Testing" },
{ message = "^chore\\(release\\): prepare for", skip = true },
{ message = "^chore\\(pr\\)", skip = true },
{ message = "^chore\\(pull\\)", skip = true },
{ message = "^chore", group = "<!-- 07 -->Miscellaneous Tasks" },
{ body = ".*security", group = "<!-- 08 -->Security" },
{ message = "^build", group = "<!-- 09 -->Build" },
{ message = "^ci", group = "<!-- 10 -->Continuous Integration" },
{ message = "^revert", group = "<!-- 11 -->Reverted Commits" },
]
# protect breaking changes from being skipped due to matching a skipping commit_parser
protect_breaking_commits = false
# filter out the commits that are not matched by commit parsers
@@ -163,9 +77,9 @@ filter_commits = false
# glob pattern for matching git tags
tag_pattern = "v[0-9]*"
# regex for skipping tags
skip_tags = "beta|alpha|v0.1.0-rc.1"
skip_tags = "v0.1.0-rc.1"
# regex for ignoring tags
ignore_tags = "rc"
ignore_tags = ""
# sort the tags topologically
topo_order = false
# sort the commits inside sections by oldest/newest order

View File

@@ -1 +0,0 @@
avoid-breaking-exported-api = false

View File

@@ -1,14 +0,0 @@
coverage: # https://docs.codecov.com/docs/codecovyml-reference#coverage
precision: 1 # e.g. 89.1%
round: down
range: 85..100 # https://docs.codecov.com/docs/coverage-configuration#section-range
status: # https://docs.codecov.com/docs/commit-status
project:
default:
threshold: 1% # Avoid false negatives
ignore:
- "examples"
- "benches"
comment: # https://docs.codecov.com/docs/pull-request-comments
# make the comments less noisy
require_changes: true

View File

@@ -1,22 +1,23 @@
# configuration for https://github.com/EmbarkStudios/cargo-deny
[licenses]
version = 2
default = "deny"
unlicensed = "deny"
copyleft = "deny"
confidence-threshold = 0.8
allow = [
"Apache-2.0",
"BSD-2-Clause",
"BSD-3-Clause",
"ISC",
"MIT",
"Unicode-3.0",
"Unicode-DFS-2016",
"WTFPL",
"Zlib",
"Apache-2.0",
"BSD-2-Clause",
"BSD-3-Clause",
"ISC",
"MIT",
"Unicode-DFS-2016",
"WTFPL",
]
[advisories]
version = 2
unmaintained = "deny"
yanked = "deny"
[bans]
multiple-versions = "allow"
@@ -25,15 +26,3 @@ multiple-versions = "allow"
unknown-registry = "deny"
unknown-git = "warn"
allow-registry = ["https://github.com/rust-lang/crates.io-index"]
[[licenses.clarify]]
crate = "ring"
# SPDX considers OpenSSL to encompass both the OpenSSL and SSLeay licenses
# https://spdx.org/licenses/OpenSSL.html
# ISC - Both BoringSSL and ring use this for their new files
# MIT - "Files in third_party/ have their own licenses, as described therein. The MIT
# license, for third_party/fiat, which, unlike other third_party directories, is
# compiled into non-test libraries, is included below."
# OpenSSL - Obviously
expression = "ISC AND MIT AND OpenSSL"
license-files = [{ path = "LICENSE", hash = 0xbd0eed23 }]

View File

@@ -1,275 +1,209 @@
# Examples
This folder contains examples that are more application focused.
These gifs were created using [Charm VHS](https://github.com/charmbracelet/vhs).
> [!TIP]
> There are also [widget examples] in `ratatui-widgets`.
VHS has a problem rendering some background color transitions, which shows up in several examples
below. See <https://github.com/charmbracelet/vhs/issues/344> for more info. These problems don't
occur in a terminal.
[widget examples]: ../ratatui-widgets/examples
You can run these examples using:
## Barchart ([barchart.rs](./barchart.rs)
```shell
cargo run -p example-name
cargo run --example=barchart --features=crossterm
```
> [!NOTE]
> This folder might use unreleased code. Consider viewing the examples in the `latest` branch instead
> of the `main` branch for code which is guaranteed to work with the released Ratatui version.
![Barchart][barchart.gif]
> [!WARNING]
>
> There may be backwards incompatible changes in these examples, as they are designed to compile
> against the `main` branch.
>
> There are a few workaround for this problem:
>
> - View the examples as they were when the latest version was release by selecting the tag that
> matches that version. E.g. <https://github.com/ratatui/ratatui/tree/v0.26.1/examples>.
> - If you're viewing this file on GitHub, there is a combo box at the top of this page which
> allows you to select any previous tagged version.
> - To view the code locally, checkout the tag. E.g. `git switch --detach v0.26.1`.
> - Use the latest [alpha version of Ratatui] in your app. These are released weekly on Saturdays.
> - Compile your code against the main branch either locally by adding e.g. `path = "../ratatui"` to
> the dependency, or remotely by adding `git = "https://github.com/ratatui/ratatui"`
>
> For a list of unreleased breaking changes, see [BREAKING-CHANGES.md].
>
> We don't keep the CHANGELOG updated with unreleased changes, check the git commit history or run
> `git-cliff -u` against a cloned version of this repository.
## Block ([block.rs](./block.rs))
## Design choices
```shell
cargo run --example=block --features=crossterm
```
The examples contain some opinionated choices in order to make it easier for newer rustaceans to
easily be productive in creating applications:
![Block][block.gif]
- Each example has an `App` struct, with methods that implement a main loop, handle events and drawing
the UI.
- We use `color_eyre` for handling errors and panics. See [How to use color-eyre with Ratatui] on the
website for more information about this.
- Common code is not extracted into a separate file. This makes each example self-contained and easy
to read as a whole.
## Calendar ([calendar.rs](./calendar.rs))
[How to use color-eyre with Ratatui]: https://ratatui.rs/recipes/apps/color-eyre/
```shell
cargo run --example=calendar --features=crossterm widget-calendar
```
## Demo
![Calendar][calendar.gif]
This is the original demo example from the main README. It is available for each of the backends.
[Source](./apps/demo/).
## Canvas ([canvas.rs](./canvas.rs))
![Demo](demo.gif)
```shell
cargo run --example=canvas --features=crossterm
```
## Demo2
![Canvas][canvas.gif]
This is the demo example from the main README and crate page. [Source](./apps/demo2/).
## Chart ([chart.rs](./chart.rs))
![Demo2](demo2.gif)
```shell
cargo run --example=chart --features=crossterm
```
## Async GitHub
![Chart][chart.gif]
Shows how to fetch data from GitHub API asynchronously. [Source](./apps/async-github/).
## Custom Widget ([custom_widget.rs](./custom_widget.rs))
![Async GitHub demo][async-github.gif]
```shell
cargo run --example=custom_widget --features=crossterm
```
## Calendar Explorer
This is not a particularly exciting example visually, but it demonstrates how to implement your own widget.
Shows how to render a calendar with different styles. [Source](./apps/calendar-explorer/).
![Custom Widget][custom_widget.gif]
![Calendar explorer demo][calendar-explorer.gif]
## Gauge ([gauge.rs](./gauge.rs))
## Canvas
Please note: the background renders poorly when we generate this example using VHS.
This problem doesn't generally happen during normal rendering in a terminal.
See <https://github.com/charmbracelet/vhs/issues/344> for more details
Shows how to render a canvas with different shapes. [Source](./apps/canvas/).
```shell
cargo run --example=gauge --features=crossterm
```
![Canvas demo][canvas.gif]
![Gauge][gauge.gif]
## Chart
## Hello World ([hello_world.rs](./hello_world.rs))
Shows how to render line, bar, and scatter charts. [Source](./apps/chart/).
```shell
cargo run --example=hello_world --features=crossterm
```
![Chart demo][chart.gif]
This is a pretty boring example, but it contains some good comments of documentation on some of the
standard approaches to writing tui apps.
## Color Explorer
![Hello World][hello_world.gif]
Shows how to handle the supported colors. [Source](./apps/color-explorer/).
## Inline ([inline.rs](./inline.rs))
![Color explorer demo][color-explorer.gif]
```shell
cargo run --example=inline --features=crossterm
```
## Colors-RGB demo
![Inline][inline.gif]
Shows the full range of RGB colors in an animation. [Source](./apps/colors-rgb/).
## Layout ([layout.rs](./layout.rs))
![Colors-RGB demo][colors-rgb.gif]
```shell
cargo run --example=layout --features=crossterm
```
## Constraint Explorer
![Layout][layout.gif]
Shows how different constraints can be used to layout widgets. [Source](./apps/constraint-explorer/).
## List ([list.rs](./list.rs))
![Constraint Explorer demo][constraint-explorer.gif]
```shell
cargo run --example=list --features=crossterm
```
## Constraints
![List][list.gif]
Shows different types of constraints. [Source](./apps/constraints/).
## Panic ([panic.rs](./panic.rs))
![Constraints demo][constraints.gif]
```shell
cargo run --example=panic --features=crossterm
```
## Custom Widget
![Panic][panic.gif]
Shows how to create a custom widget that can be interacted with the mouse. [Source](./apps/custom-widget/).
## Paragraph ([paragraph.rs](./paragraph.rs))
![Custom widget demo][custom-widget.gif]
```shell
cargo run --example=paragraph --features=crossterm
```
## Hyperlink
![Paragraph][paragraph.gif]
Shows how to render hyperlinks in a terminal using [OSC
8](https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda). [Source](./apps/hyperlink/).
## Popup ([popup.rs](./popup.rs))
![Hyperlink demo][hyperlink.gif]
```shell
cargo run --example=popup --features=crossterm
```
## Flex
Please note: the background renders poorly when we generate this example using VHS.
This problem doesn't generally happen during normal rendering in a terminal.
See <https://github.com/charmbracelet/vhs/issues/344> for more details
Shows how to use the flex layouts. [Source](./apps/flex/).
![Popup][popup.gif]
![Flex demo][flex.gif]
## Scrollbar ([scrollbar.rs](./scrollbar.rs))
## Hello World
```shell
cargo run --example=scrollbar --features=crossterm
```
Shows how to create a simple TUI with a text. [Source](./apps/hello-world/).
![Scrollbar][scrollbar.gif]
![Hello World demo][hello-world.gif]
## Sparkline ([sparkline.rs](./sparkline.rs))
## Gauge
```shell
cargo run --example=sparkline --features=crossterm
```
Shows different types of gauges. [Source](./apps/gauge/).
![Sparkline][sparkline.gif]
## Inline
## Table ([table.rs](./table.rs))
Shows how to use the inlined viewport to render in a specific area of the screen. [Source](./apps/inline/).
```shell
cargo run --example=table --features=crossterm
```
![Inline demo][inline.gif]
![Table][table.gif]
## Input Form
## Tabs ([tabs.rs](./tabs.rs))
Shows how to render a form with input fields. [Source](./apps/input-form/).
```shell
cargo run --example=tabs --features=crossterm
```
## Modifiers
![Tabs][tabs.gif]
Shows different types of modifiers. [Source](./apps/modifiers/).
## User Input ([user_input.rs](./user_input.rs))
![Modifiers demo][modifiers.gif]
```shell
cargo run --example=user_input --features=crossterm
```
## Mouse Drawing
Shows how to handle mouse events. [Source](./apps/mouse-drawing/).
## Minimal
Shows how to create a minimal application. [Source](./apps/minimal/).
![Minimal demo][minimal.gif]
## Panic
Shows how to handle panics. [Source](./apps/panic/).
![Panic demo][panic.gif]
## Popup
Shows how to handle popups. [Source](./apps/popup/).
![Popup demo][popup.gif]
## Scrollbar
Shows how to render different types of scrollbars. [Source](./apps/scrollbar/).
![Scrollbar demo][scrollbar.gif]
## Table
Shows how to create an interactive table. [Source](./apps/table/).
![Table demo][table.gif]
## Todo List
Shows how to create a simple todo list application. [Source](./apps/todo-list/).
![Todo List demo][todo-list.gif]
## Tracing
Shows how to use the [tracing](https://crates.io/crates/tracing) crate to log to a file. [Source](./apps/tracing/).
![Tracing demo][tracing.gif]
## User Input
Shows how to handle user input. [Source](./apps/user-input/).
![User input demo][user-input.gif]
## Weather
Shows how to render weather data using barchart widget. [Source](./apps/weather/).
## WidgetRef Container
Shows how to use [`WidgetRef`](https://docs.rs/ratatui/latest/ratatui/widgets/trait.WidgetRef.html) to store widgets in a container. [Source](./apps/widget-ref-container/).
## Advanced Widget Implementation
Shows how to render the `Widget` trait in different ways.
![Advanced widget impl demo][advanced-widget-impl.gif]
---
<details>
<summary>How to update these examples?</summary>
These gifs were created using [VHS](https://github.com/charmbracelet/vhs). Each example has a
corresponding `.tape` file that holds instructions for how to generate the images. Note that the
images themselves are stored in a separate `images` git branch to avoid bloating the `main`
branch.
![User Input][user_input.gif]
<!--
links to images to make it easier to update in bulk
These are generated with `vhs publish examples/xxx.gif`
Links to images to make them easier to update in bulk. Use the following script to update and upload
the examples to the images branch. (Requires push access to the branch).
To update these examples in bulk:
```shell
vhs/generate.bash
# build to ensure that running the examples doesn't have to wait so long
cargo build --examples --features=crossterm,all-widgets
for i in examples/*.tape
do
echo -n "[${i:s:examples/:::s:.tape:.gif:}]: "
vhs $i --publish --quiet
# may need to adjust this depending on if you see rate limiting from VHS
sleep 1
done
```
-->
</details>
[advanced-widget-impl.gif]: https://github.com/ratatui/ratatui/blob/images/examples/advanced-widget-impl.gif?raw=true
[async-github.gif]: https://github.com/ratatui/ratatui/blob/images/examples/async-github.gif?raw=true
[calendar-explorer.gif]: https://github.com/ratatui/ratatui/blob/images/examples/calendar-explorer.gif?raw=true
[canvas.gif]: https://github.com/ratatui/ratatui/blob/images/examples/canvas.gif?raw=true
[chart.gif]: https://github.com/ratatui/ratatui/blob/images/examples/chart.gif?raw=true
[color-explorer.gif]: https://github.com/ratatui/ratatui/blob/images/examples/color-explorer.gif?raw=true
[colors-rgb.gif]: https://github.com/ratatui/ratatui/blob/images/examples/colors-rgb.gif?raw=true
[constraint-explorer.gif]: https://github.com/ratatui/ratatui/blob/images/examples/constraint-explorer.gif?raw=true
[constraints.gif]: https://github.com/ratatui/ratatui/blob/images/examples/constraints.gif?raw=true
[custom-widget.gif]: https://github.com/ratatui/ratatui/blob/images/examples/custom-widget.gif?raw=true
[demo2-destroy.gif]: https://github.com/ratatui/ratatui/blob/images/examples/demo2-destroy.gif?raw=true
[demo2-social.gif]: https://github.com/ratatui/ratatui/blob/images/examples/demo2-social.gif?raw=true
[demo2.gif]: https://github.com/ratatui/ratatui/blob/images/examples/demo2.gif?raw=true
[demo.gif]: https://github.com/ratatui/ratatui/blob/images/examples/demo.gif?raw=true
[flex.gif]: https://github.com/ratatui/ratatui/blob/images/examples/flex.gif?raw=true
[hello-world.gif]: https://github.com/ratatui/ratatui/blob/images/examples/hello-world.gif?raw=true
[hyperlink.gif]: https://github.com/ratatui/ratatui/blob/images/examples/hyperlink.gif?raw=true
[inline.gif]: https://github.com/ratatui/ratatui/blob/images/examples/inline.gif?raw=true
[minimal.gif]: https://github.com/ratatui/ratatui/blob/images/examples/minimal.gif?raw=true
[modifiers.gif]: https://github.com/ratatui/ratatui/blob/images/examples/modifiers.gif?raw=true
[panic.gif]: https://github.com/ratatui/ratatui/blob/images/examples/panic.gif?raw=true
[popup.gif]: https://github.com/ratatui/ratatui/blob/images/examples/popup.gif?raw=true
[scrollbar.gif]: https://github.com/ratatui/ratatui/blob/images/examples/scrollbar.gif?raw=true
[table.gif]: https://github.com/ratatui/ratatui/blob/images/examples/table.gif?raw=true
[todo-list.gif]: https://github.com/ratatui/ratatui/blob/images/examples/todo-list.gif?raw=true
[tracing.gif]: https://github.com/ratatui/ratatui/blob/images/examples/tracing.gif?raw=true
[user-input.gif]: https://github.com/ratatui/ratatui/blob/images/examples/user-input.gif?raw=true
[barchart.gif]: https://vhs.charm.sh/vhs-6ioxdeRBVkVpyXcjIEVaJU.gif
[block.gif]: https://vhs.charm.sh/vhs-1sEo9vVkHRwFtu95MOXrTj.gif
[calendar.gif]: https://vhs.charm.sh/vhs-1dBcpMSSP80WkBgm4lBhNo.gif
[canvas.gif]: https://vhs.charm.sh/vhs-4zeWEPF6bLEFSHuJrvaHlN.gif
[chart.gif]: https://vhs.charm.sh/vhs-zRzsE2AwRixQhcWMTAeF1.gif
[custom_widget.gif]: https://vhs.charm.sh/vhs-32mW1TpkrovTcm79QXmBSu.gif
[gauge.gif]: https://vhs.charm.sh/vhs-2rvSeP5r4lRkGTzNCKpm9a.gif
[hello_world.gif]: https://vhs.charm.sh/vhs-3CKUwxFuQi8oKQMS5zkPfQ.gif
[inline.gif]: https://vhs.charm.sh/vhs-miRl1mosKFoJV7LjjvF4T.gif
[layout.gif]: https://vhs.charm.sh/vhs-5R8O3LQGQ5pQVWwlPVrdbQ.gif
[list.gif]: https://vhs.charm.sh/vhs-4goo9reeUM9r0nYb54R7SP.gif
[panic.gif]: https://vhs.charm.sh/vhs-HrvKCHV4yeN69fb1EadTH.gif
[paragraph.gif]: https://vhs.charm.sh/vhs-2qIPDi79DUmtmeNDEeHVEF.gif
[popup.gif]: https://vhs.charm.sh/vhs-2QnC682AUeNYNXcjNlKTyp.gif
[scrollbar.gif]: https://vhs.charm.sh/vhs-2p13MMFreW7Gwt1xIonIWu.gif
[sparkline.gif]: https://vhs.charm.sh/vhs-4t59Vxw5Za33Rtvt9QrftA.gif
[table.gif]: https://vhs.charm.sh/vhs-6IrGHgT385DqA6xnwGF9oD.gif
[tabs.gif]: https://vhs.charm.sh/vhs-61WkbfhyDk0kbkjncErdHT.gif
[user_input.gif]: https://vhs.charm.sh/vhs-4fxUgkpEWcVyBRXuyYKODY.gif

View File

@@ -1,14 +0,0 @@
[package]
name = "advanced-widget-impl"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
ratatui = { workspace = true, features = ["unstable-widget-ref"] }
[lints]
workspace = true

View File

@@ -1,9 +0,0 @@
# Advanced Widget Implementation demo
This example shows how to render the `Widget` trait in different ways.
To run this demo:
```shell
cargo run -p advanced-widget-impl
```

View File

@@ -1,241 +0,0 @@
/// A Ratatui example that demonstrates how to implement the `Widget` trait.
///
/// This example demonstrates various ways to implement `Widget` traits in Ratatui on a type, a
/// reference, and a mutable reference. It also shows how to use the `WidgetRef` trait to
/// render boxed widgets.
///
/// This example runs with the Ratatui library code in the branch that you are currently
/// reading. See the [`latest`] branch for the code which works with the most recent Ratatui
/// release.
///
/// [`latest`]: https://github.com/ratatui/ratatui/tree/latest
use std::time::{Duration, Instant};
use color_eyre::Result;
use crossterm::event;
use ratatui::DefaultTerminal;
use ratatui::buffer::Buffer;
use ratatui::layout::{Constraint, Layout, Position, Rect, Size};
use ratatui::style::{Color, Style};
use ratatui::widgets::{Widget, WidgetRef};
fn main() -> Result<()> {
color_eyre::install()?;
ratatui::run(|terminal| App::default().run(terminal))
}
#[derive(Default)]
struct App {
should_quit: bool,
timer: Timer,
boxed_squares: BoxedSquares,
green_square: RightAlignedSquare,
}
impl App {
fn run(mut self, terminal: &mut DefaultTerminal) -> Result<()> {
while !self.should_quit {
self.render(terminal)?;
self.handle_events()?;
}
Ok(())
}
fn render(&mut self, tui: &mut DefaultTerminal) -> Result<()> {
tui.draw(|frame| frame.render_widget(self, frame.area()))?;
Ok(())
}
fn handle_events(&mut self) -> Result<()> {
// Handle events at least 50 frames per second (gifs are usually 50fps)
let timeout = Duration::from_secs_f64(1.0 / 50.0);
if !event::poll(timeout)? {
return Ok(());
}
if event::read()?.is_key_press() {
self.should_quit = true;
}
Ok(())
}
}
/// Implement the `Widget` trait on a mutable reference to the `App` type.
///
/// This allows the `App` type to be rendered as a widget. The `App` type owns several other widgets
/// that are rendered as part of the app. The `Widget` trait is implemented on a mutable reference
/// to the `App` type, which allows this to be rendered without consuming the `App` type, and allows
/// the sub-widgets to be mutable.
impl Widget for &mut App {
fn render(self, area: Rect, buf: &mut Buffer) {
let constraints = Constraint::from_lengths([1, 1, 2, 1]);
let [greeting, timer, squares, position] = area.layout(&Layout::vertical(constraints));
// render an ephemeral greeting widget
Greeting::new("Ratatui!").render(greeting, buf);
// render a reference to the timer widget
self.timer.render(timer, buf);
// render a boxed widget containing red and blue squares
self.boxed_squares.render(squares, buf);
// render a mutable reference to the green square widget
self.green_square.render(squares, buf);
// Display the dynamically updated position of the green square
let square_position = format!("Green square is at {}", self.green_square.last_position);
square_position.render(position, buf);
}
}
/// An ephemeral greeting widget.
///
/// This widget is implemented on the type itself, which means that it is consumed when it is
/// rendered. This is useful for widgets that are cheap to create, don't need to be reused, and
/// don't need to store any state between renders. This is the simplest way to implement a widget in
/// Ratatui, but in most cases, it is better to implement the `Widget` trait on a reference to the
/// type, as shown in the other examples below.
///
/// This was the way most widgets were implemented in Ratatui before `Widget` was implemented on
/// references in [PR #903] (merged in Ratatui 0.26.0).
///
/// [PR #903]: https://github.com/ratatui/ratatui/pull/903
struct Greeting {
name: String,
}
impl Greeting {
fn new(name: &str) -> Self {
Self {
name: name.to_string(),
}
}
}
impl Widget for Greeting {
fn render(self, area: Rect, buf: &mut Buffer) {
let greeting = format!("Hello, {}!", self.name);
greeting.render(area, buf);
}
}
/// A timer widget that displays the elapsed time since the timer was started.
#[derive(Debug)]
struct Timer {
start: Instant,
}
impl Default for Timer {
fn default() -> Self {
Self {
start: Instant::now(),
}
}
}
/// This implements `Widget` on a reference to the type, which means that it can be reused and
/// doesn't need to be consumed when it is rendered. This is useful for widgets that need to store
/// state and be updated over time.
///
/// This approach was probably always available in Ratatui, but it wasn't widely used until `Widget`
/// was implemented on references in [PR #903] (merged in Ratatui 0.26.0). This is because all the
/// built-in widgets previously would consume themselves when rendered.
impl Widget for &Timer {
fn render(self, area: Rect, buf: &mut Buffer) {
let elapsed = self.start.elapsed().as_secs_f32();
let message = format!("Elapsed: {elapsed:.1?}s");
message.render(area, buf);
}
}
/// A widget that contains a list of several different widgets.
struct BoxedSquares {
squares: Vec<Box<dyn WidgetRef>>,
}
impl Default for BoxedSquares {
fn default() -> Self {
let red_square: Box<dyn WidgetRef> = Box::new(RedSquare);
let blue_square: Box<dyn WidgetRef> = Box::new(BlueSquare);
Self {
squares: vec![red_square, blue_square],
}
}
}
/// A widget that renders a red square.
struct RedSquare;
/// A widget that renders a blue square.
struct BlueSquare;
/// This implements the `Widget` trait on a reference to the type. It contains a list of boxed
/// widgets that implement the `WidgetRef` trait. This is useful for widgets that contain a list of
/// other widgets that can be different types.
impl Widget for &BoxedSquares {
fn render(self, area: Rect, buf: &mut Buffer) {
let constraints = vec![Constraint::Length(4); self.squares.len()];
let areas = area.layout_vec(&Layout::horizontal(constraints));
for (widget, area) in self.squares.iter().zip(areas) {
widget.render_ref(area, buf);
}
}
}
/// `RedSquare` and `BlueSquare` are widgets that render a red and blue square, respectively. They
/// implement the `WidgetRef` trait instead of the `Widget` trait, which which allows them to be
/// rendered as boxed widgets. It's not possible to use Widget for this as a dynamic reference to a
/// widget cannot generally be moved out of the box.
impl WidgetRef for RedSquare {
fn render_ref(&self, area: Rect, buf: &mut Buffer) {
fill(area, buf, "", Color::Red);
}
}
impl WidgetRef for BlueSquare {
fn render_ref(&self, area: Rect, buf: &mut Buffer) {
fill(area, buf, "", Color::Blue);
}
}
/// A widget that renders a green square aligned to the right of the area.
#[derive(Default)]
struct RightAlignedSquare {
last_position: Position,
}
/// This widget is implemented on a mutable reference to the type, which means that it can store
/// state and update it when it is rendered. This is useful for widgets that need to store the
/// result of some calculation that can only be done when the widget is rendered.
///
/// The x and y coordinates of the square are stored in the widget and updated when the widget is
/// rendered. This allows the square to be aligned to the right of the area. These coordinates could
/// be used to perform hit testing (e.g. checking if a mouse click is inside the square). This app
/// just displays the coordinates as a string.
///
/// This approach was probably always available in Ratatui, but it wasn't widely used either. This
/// is an alternative to implementing the `StatefulWidget` trait, for situations where you want to
/// store the state in the widget itself instead of a separate struct.
impl Widget for &mut RightAlignedSquare {
/// Render a green square aligned to the right of the area and store the position.
fn render(self, area: Rect, buf: &mut Buffer) {
const WIDTH: u16 = 4;
let x = area.right() - WIDTH; // Align to the right
self.last_position = Position { x, y: area.y };
let size = Size::new(WIDTH, area.height);
let area = Rect::from((self.last_position, size));
fill(area, buf, "", Color::Green);
}
}
/// Fill the area with the specified symbol and style.
///
/// This probably should be a method on the `Buffer` type, but it is defined here for simplicity.
/// <https://github.com/ratatui/ratatui/issues/1146>
fn fill<S: Into<Style>>(area: Rect, buf: &mut Buffer, symbol: &str, style: S) {
let style = style.into();
for y in area.top()..area.bottom() {
for x in area.left()..area.right() {
buf[(x, y)].set_symbol(symbol).set_style(style);
}
}
}

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@@ -1,22 +0,0 @@
[package]
name = "async-github"
publish = false
authors.workspace = true
documentation.workspace = true
repository.workspace = true
homepage.workspace = true
keywords.workspace = true
categories.workspace = true
readme.workspace = true
license.workspace = true
exclude.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm = { workspace = true, features = ["event-stream"] }
octocrab.workspace = true
ratatui.workspace = true
tokio = { workspace = true, features = ["rt-multi-thread", "macros"] }
tokio-stream.workspace = true

View File

@@ -1,9 +0,0 @@
# Async GitHub demo
This example demonstrates how to use Ratatui with widgets that fetch data from GitHub API asynchronously.
To run this demo:
```shell
cargo run -p async-github
```

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@@ -1,236 +0,0 @@
//! # [Ratatui] Async example
//!
//! This example demonstrates how to use Ratatui with widgets that fetch data asynchronously. It
//! uses the `octocrab` crate to fetch a list of pull requests from the GitHub API.
//!
//! <https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/managing-your-personal-access-tokens#creating-a-fine-grained-personal-access-token>
//! <https://github.com/settings/tokens/new> to create a new token (select classic, and no scopes)
//!
//! This example does not cover message passing between threads, it only demonstrates how to manage
//! shared state between the main thread and a background task, which acts mostly as a one-shot
//! fetcher. For more complex scenarios, you may need to use channels or other synchronization
//! primitives.
//!
//! A simple app might have multiple widgets that fetch data from different sources, and each widget
//! would have its own background task to fetch the data. The main thread would then render the
//! widgets with the latest data.
//!
//! The latest version of this example is available in the [examples] folder in the repository.
//!
//! Please note that the examples are designed to be run against the `main` branch of the Github
//! repository. This means that you may not be able to compile with the latest release version on
//! crates.io, or the one that you have installed locally.
//!
//! See the [examples readme] for more information on finding examples that match the version of the
//! library you are using.
//!
//! [Ratatui]: https://github.com/ratatui/ratatui
//! [examples]: https://github.com/ratatui/ratatui/blob/main/examples
//! [examples readme]: https://github.com/ratatui/ratatui/blob/main/examples/README.md
use std::sync::{Arc, RwLock};
use std::time::Duration;
use color_eyre::Result;
use crossterm::event::{Event, EventStream, KeyCode};
use octocrab::Page;
use octocrab::params::Direction;
use octocrab::params::pulls::Sort;
use ratatui::buffer::Buffer;
use ratatui::layout::{Constraint, Layout, Rect};
use ratatui::style::{Style, Stylize};
use ratatui::text::Line;
use ratatui::widgets::{Block, HighlightSpacing, Row, StatefulWidget, Table, TableState, Widget};
use ratatui::{DefaultTerminal, Frame};
use tokio_stream::StreamExt;
#[tokio::main]
async fn main() -> Result<()> {
color_eyre::install()?;
let terminal = ratatui::init();
let app_result = App::default().run(terminal).await;
ratatui::restore();
app_result
}
#[derive(Debug, Default)]
struct App {
should_quit: bool,
pull_requests: PullRequestListWidget,
}
impl App {
const FRAMES_PER_SECOND: f32 = 60.0;
pub async fn run(mut self, mut terminal: DefaultTerminal) -> Result<()> {
self.pull_requests.run();
let period = Duration::from_secs_f32(1.0 / Self::FRAMES_PER_SECOND);
let mut interval = tokio::time::interval(period);
let mut events = EventStream::new();
while !self.should_quit {
tokio::select! {
_ = interval.tick() => { terminal.draw(|frame| self.render(frame))?; },
Some(Ok(event)) = events.next() => self.handle_event(&event),
}
}
Ok(())
}
fn render(&self, frame: &mut Frame) {
let layout = Layout::vertical([Constraint::Length(1), Constraint::Fill(1)]);
let [title_area, body_area] = frame.area().layout(&layout);
let title = Line::from("Ratatui async example").centered().bold();
frame.render_widget(title, title_area);
frame.render_widget(&self.pull_requests, body_area);
}
fn handle_event(&mut self, event: &Event) {
if let Some(key) = event.as_key_press_event() {
match key.code {
KeyCode::Char('q') | KeyCode::Esc => self.should_quit = true,
KeyCode::Char('j') | KeyCode::Down => self.pull_requests.scroll_down(),
KeyCode::Char('k') | KeyCode::Up => self.pull_requests.scroll_up(),
_ => {}
}
}
}
}
/// A widget that displays a list of pull requests.
///
/// This is an async widget that fetches the list of pull requests from the GitHub API. It contains
/// an inner `Arc<RwLock<PullRequestListState>>` that holds the state of the widget. Cloning the
/// widget will clone the Arc, so you can pass it around to other threads, and this is used to spawn
/// a background task to fetch the pull requests.
#[derive(Debug, Clone, Default)]
struct PullRequestListWidget {
state: Arc<RwLock<PullRequestListState>>,
}
#[derive(Debug, Default)]
struct PullRequestListState {
pull_requests: Vec<PullRequest>,
loading_state: LoadingState,
table_state: TableState,
}
#[derive(Debug, Clone)]
struct PullRequest {
id: String,
title: String,
url: String,
}
#[derive(Debug, Clone, Default, PartialEq, Eq)]
enum LoadingState {
#[default]
Idle,
Loading,
Loaded,
Error(String),
}
impl PullRequestListWidget {
/// Start fetching the pull requests in the background.
///
/// This method spawns a background task that fetches the pull requests from the GitHub API.
/// The result of the fetch is then passed to the `on_load` or `on_err` methods.
fn run(&self) {
let this = self.clone(); // clone the widget to pass to the background task
tokio::spawn(this.fetch_pulls());
}
async fn fetch_pulls(self) {
// this runs once, but you could also run this in a loop, using a channel that accepts
// messages to refresh on demand, or with an interval timer to refresh every N seconds
self.set_loading_state(LoadingState::Loading);
match octocrab::instance()
.pulls("ratatui", "ratatui")
.list()
.sort(Sort::Updated)
.direction(Direction::Descending)
.send()
.await
{
Ok(page) => self.on_load(&page),
Err(err) => self.on_err(&err),
}
}
fn on_load(&self, page: &Page<OctoPullRequest>) {
let prs = page.items.iter().map(Into::into);
let mut state = self.state.write().unwrap();
state.loading_state = LoadingState::Loaded;
state.pull_requests.extend(prs);
if !state.pull_requests.is_empty() {
state.table_state.select(Some(0));
}
}
fn on_err(&self, err: &octocrab::Error) {
self.set_loading_state(LoadingState::Error(err.to_string()));
}
fn set_loading_state(&self, state: LoadingState) {
self.state.write().unwrap().loading_state = state;
}
fn scroll_down(&self) {
self.state.write().unwrap().table_state.scroll_down_by(1);
}
fn scroll_up(&self) {
self.state.write().unwrap().table_state.scroll_up_by(1);
}
}
type OctoPullRequest = octocrab::models::pulls::PullRequest;
impl From<&OctoPullRequest> for PullRequest {
fn from(pr: &OctoPullRequest) -> Self {
Self {
id: pr.number.to_string(),
title: pr.title.as_ref().unwrap().to_string(),
url: pr
.html_url
.as_ref()
.map(ToString::to_string)
.unwrap_or_default(),
}
}
}
impl Widget for &PullRequestListWidget {
fn render(self, area: Rect, buf: &mut Buffer) {
let mut state = self.state.write().unwrap();
// a block with a right aligned title with the loading state on the right
let loading_state = Line::from(format!("{:?}", state.loading_state)).right_aligned();
let block = Block::bordered()
.title("Pull Requests")
.title(loading_state)
.title_bottom("j/k to scroll, q to quit");
// a table with the list of pull requests
let rows = state.pull_requests.iter();
let widths = [
Constraint::Length(5),
Constraint::Fill(1),
Constraint::Max(49),
];
let table = Table::new(rows, widths)
.block(block)
.highlight_spacing(HighlightSpacing::Always)
.highlight_symbol(">>")
.row_highlight_style(Style::new().on_blue());
StatefulWidget::render(table, area, buf, &mut state.table_state);
}
}
impl From<&PullRequest> for Row<'_> {
fn from(pr: &PullRequest) -> Self {
let pr = pr.clone();
Row::new(vec![pr.id, pr.title, pr.url])
}
}

View File

@@ -1,15 +0,0 @@
[package]
name = "calendar-explorer"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
ratatui.workspace = true
time = { workspace = true, features = ["formatting", "parsing"] }
[lints]
workspace = true

View File

@@ -1,9 +0,0 @@
# Calendar explorer demo
This example shows how to render a calendar with different styles.
To run this demo:
```shell
cargo run -p calendar-explorer
```

View File

@@ -1,236 +0,0 @@
//! A Ratatui example that demonstrates how to render calendar with different styles.
//!
//! Marks the holidays and seasons on the calendar.
//!
//! This example runs with the Ratatui library code in the branch that you are currently reading.
//! See the [`latest`] branch for the code which works with the most recent Ratatui release.
//!
//! [`latest`]: https://github.com/ratatui/ratatui/tree/latest
//! [`BarChart`]: https://docs.rs/ratatui/latest/ratatui/widgets/struct.BarChart.html
use std::fmt;
use color_eyre::Result;
use crossterm::event::{self, KeyCode};
use ratatui::layout::{Constraint, Layout, Margin, Rect};
use ratatui::style::{Color, Modifier, Style, Stylize};
use ratatui::text::{Line, Text};
use ratatui::widgets::calendar::{CalendarEventStore, Monthly};
use ratatui::{DefaultTerminal, Frame};
use time::ext::NumericalDuration;
use time::{Date, Month, OffsetDateTime};
fn main() -> Result<()> {
color_eyre::install()?;
ratatui::run(run)
}
/// Run the application.
fn run(terminal: &mut DefaultTerminal) -> Result<()> {
let mut selected_date = OffsetDateTime::now_local()?.date();
let mut calendar_style = StyledCalendar::Default;
loop {
terminal.draw(|frame| render(frame, calendar_style, selected_date))?;
if let Some(key) = event::read()?.as_key_press_event() {
match key.code {
KeyCode::Char('q') => break Ok(()),
KeyCode::Char('s') => calendar_style = calendar_style.next(),
KeyCode::Char('n') | KeyCode::Tab => selected_date = next_month(selected_date),
KeyCode::Char('p') | KeyCode::BackTab => selected_date = prev_month(selected_date),
KeyCode::Char('h') | KeyCode::Left => selected_date -= 1.days(),
KeyCode::Char('j') | KeyCode::Down => selected_date += 1.weeks(),
KeyCode::Char('k') | KeyCode::Up => selected_date -= 1.weeks(),
KeyCode::Char('l') | KeyCode::Right => selected_date += 1.days(),
_ => {}
}
}
}
}
fn next_month(date: Date) -> Date {
if date.month() == Month::December {
date.replace_month(Month::January)
.unwrap()
.replace_year(date.year() + 1)
.unwrap()
} else {
date.replace_month(date.month().next()).unwrap()
}
}
fn prev_month(date: Date) -> Date {
if date.month() == Month::January {
date.replace_month(Month::December)
.unwrap()
.replace_year(date.year() - 1)
.unwrap()
} else {
date.replace_month(date.month().previous()).unwrap()
}
}
/// Render the UI with a calendar.
fn render(frame: &mut Frame, calendar_style: StyledCalendar, selected_date: Date) {
let header = Text::from_iter([
Line::from("Calendar Example".bold()),
Line::from(
"<q> Quit | <s> Change Style | <n> Next Month | <p> Previous Month, <hjkl> Move",
),
Line::from(format!(
"Current date: {selected_date} | Current style: {calendar_style}"
)),
]);
let [text_area, area] = frame.area().layout(&Layout::vertical([
Constraint::Length(header.height() as u16),
Constraint::Fill(1),
]));
frame.render_widget(header.centered(), text_area);
calendar_style
.render_year(frame, area, selected_date)
.unwrap();
}
#[derive(Debug, Clone, Copy)]
enum StyledCalendar {
Default,
Surrounding,
WeekdaysHeader,
SurroundingAndWeekdaysHeader,
MonthHeader,
MonthAndWeekdaysHeader,
}
impl StyledCalendar {
// Cycle through the different styles.
const fn next(self) -> Self {
match self {
Self::Default => Self::Surrounding,
Self::Surrounding => Self::WeekdaysHeader,
Self::WeekdaysHeader => Self::SurroundingAndWeekdaysHeader,
Self::SurroundingAndWeekdaysHeader => Self::MonthHeader,
Self::MonthHeader => Self::MonthAndWeekdaysHeader,
Self::MonthAndWeekdaysHeader => Self::Default,
}
}
}
impl fmt::Display for StyledCalendar {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Self::Default => write!(f, "Default"),
Self::Surrounding => write!(f, "Show Surrounding"),
Self::WeekdaysHeader => write!(f, "Show Weekdays Header"),
Self::SurroundingAndWeekdaysHeader => write!(f, "Show Surrounding and Weekdays Header"),
Self::MonthHeader => write!(f, "Show Month Header"),
Self::MonthAndWeekdaysHeader => write!(f, "Show Month Header and Weekdays Header"),
}
}
}
impl StyledCalendar {
fn render_year(self, frame: &mut Frame, area: Rect, date: Date) -> Result<()> {
let events = events(date)?;
let vertical = Layout::vertical([Constraint::Ratio(1, 3); 3]);
let horizontal = &Layout::horizontal([Constraint::Ratio(1, 4); 4]);
let areas = area
.inner(Margin::new(1, 1))
.layout_vec(&vertical)
.into_iter()
.flat_map(|row| row.layout_vec(horizontal));
for (i, area) in areas.enumerate() {
let month = date
.replace_day(1)
.unwrap()
.replace_month(Month::try_from(i as u8 + 1).unwrap())
.unwrap();
self.render_month(frame, area, month, &events);
}
Ok(())
}
fn render_month(self, frame: &mut Frame, area: Rect, date: Date, events: &CalendarEventStore) {
let calendar = match self {
Self::Default => Monthly::new(date, events)
.default_style(Style::new().bold().bg(Color::Rgb(50, 50, 50)))
.show_month_header(Style::default()),
Self::Surrounding => Monthly::new(date, events)
.default_style(Style::new().bold().bg(Color::Rgb(50, 50, 50)))
.show_month_header(Style::default())
.show_surrounding(Style::new().dim()),
Self::WeekdaysHeader => Monthly::new(date, events)
.default_style(Style::new().bold().bg(Color::Rgb(50, 50, 50)))
.show_month_header(Style::default())
.show_weekdays_header(Style::new().bold().green()),
Self::SurroundingAndWeekdaysHeader => Monthly::new(date, events)
.default_style(Style::new().bold().bg(Color::Rgb(50, 50, 50)))
.show_month_header(Style::default())
.show_surrounding(Style::new().dim())
.show_weekdays_header(Style::new().bold().green()),
Self::MonthHeader => Monthly::new(date, events)
.default_style(Style::new().bold().bg(Color::Rgb(50, 50, 50)))
.show_month_header(Style::default())
.show_month_header(Style::new().bold().green()),
Self::MonthAndWeekdaysHeader => Monthly::new(date, events)
.default_style(Style::new().bold().bg(Color::Rgb(50, 50, 50)))
.show_month_header(Style::default())
.show_weekdays_header(Style::new().bold().dim().light_yellow()),
};
frame.render_widget(calendar, area);
}
}
/// Makes a list of dates for the current year.
fn events(selected_date: Date) -> Result<CalendarEventStore> {
const SELECTED: Style = Style::new()
.fg(Color::White)
.bg(Color::Red)
.add_modifier(Modifier::BOLD);
const HOLIDAY: Style = Style::new()
.fg(Color::Red)
.add_modifier(Modifier::UNDERLINED);
const SEASON: Style = Style::new()
.fg(Color::Green)
.bg(Color::Black)
.add_modifier(Modifier::UNDERLINED);
let mut list = CalendarEventStore::today(
Style::default()
.add_modifier(Modifier::BOLD)
.bg(Color::Blue),
);
let y = selected_date.year();
// new year's
list.add(Date::from_calendar_date(y, Month::January, 1)?, HOLIDAY);
// next new_year's for December "show surrounding"
list.add(Date::from_calendar_date(y + 1, Month::January, 1)?, HOLIDAY);
// groundhog day
list.add(Date::from_calendar_date(y, Month::February, 2)?, HOLIDAY);
// april fool's
list.add(Date::from_calendar_date(y, Month::April, 1)?, HOLIDAY);
// earth day
list.add(Date::from_calendar_date(y, Month::April, 22)?, HOLIDAY);
// star wars day
list.add(Date::from_calendar_date(y, Month::May, 4)?, HOLIDAY);
// festivus
list.add(Date::from_calendar_date(y, Month::December, 23)?, HOLIDAY);
// new year's eve
list.add(Date::from_calendar_date(y, Month::December, 31)?, HOLIDAY);
// seasons
// spring equinox
list.add(Date::from_calendar_date(y, Month::March, 22)?, SEASON);
// summer solstice
list.add(Date::from_calendar_date(y, Month::June, 21)?, SEASON);
// fall equinox
list.add(Date::from_calendar_date(y, Month::September, 22)?, SEASON);
// winter solstice
list.add(Date::from_calendar_date(y, Month::December, 21)?, SEASON);
// selected date
list.add(selected_date, SELECTED);
Ok(list)
}

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@@ -1,15 +0,0 @@
[package]
name = "canvas"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
itertools.workspace = true
ratatui.workspace = true
[lints]
workspace = true

View File

@@ -1,9 +0,0 @@
# Canvas demo
This example shows how to render various shapes and a map on a canvas.
To run this demo:
```shell
cargo run -p canvas
```

View File

@@ -1,263 +0,0 @@
/// A Ratatui example that demonstrates how to draw on a canvas.
///
/// This example demonstrates how to draw various shapes such as rectangles, circles, and lines
/// on a canvas. It also demonstrates how to draw a map.
///
/// This example runs with the Ratatui library code in the branch that you are currently
/// reading. See the [`latest`] branch for the code which works with the most recent Ratatui
/// release.
///
/// [`latest`]: https://github.com/ratatui/ratatui/tree/latest
use std::{
io::stdout,
time::{Duration, Instant},
};
use color_eyre::Result;
use crossterm::ExecutableCommand;
use crossterm::event::{
self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode, KeyEvent, MouseEventKind,
};
use itertools::Itertools;
use ratatui::layout::{Constraint, Layout, Position, Rect};
use ratatui::style::{Color, Stylize};
use ratatui::symbols::Marker;
use ratatui::text::Text;
use ratatui::widgets::canvas::{Canvas, Circle, Map, MapResolution, Points, Rectangle};
use ratatui::widgets::{Block, Widget};
use ratatui::{DefaultTerminal, Frame};
fn main() -> Result<()> {
color_eyre::install()?;
stdout().execute(EnableMouseCapture)?;
let terminal = ratatui::init();
let app_result = App::new().run(terminal);
ratatui::restore();
stdout().execute(DisableMouseCapture)?;
app_result
}
struct App {
exit: bool,
x: f64,
y: f64,
ball: Circle,
playground: Rect,
vx: f64,
vy: f64,
marker: Marker,
points: Vec<Position>,
is_drawing: bool,
}
impl App {
const fn new() -> Self {
Self {
exit: false,
x: 0.0,
y: 0.0,
ball: Circle {
x: 20.0,
y: 40.0,
radius: 10.0,
color: Color::Yellow,
},
playground: Rect::new(10, 10, 200, 100),
vx: 1.0,
vy: 1.0,
marker: Marker::Dot,
points: vec![],
is_drawing: false,
}
}
pub fn run(mut self, mut terminal: DefaultTerminal) -> Result<()> {
let tick_rate = Duration::from_millis(16);
let mut last_tick = Instant::now();
while !self.exit {
terminal.draw(|frame| self.render(frame))?;
let timeout = tick_rate.saturating_sub(last_tick.elapsed());
if !event::poll(timeout)? {
self.on_tick();
last_tick = Instant::now();
continue;
}
match event::read()? {
Event::Key(key) => self.handle_key_event(key),
Event::Mouse(event) => self.handle_mouse_event(event),
_ => (),
}
}
Ok(())
}
fn handle_key_event(&mut self, key: KeyEvent) {
if !key.is_press() {
return;
}
match key.code {
KeyCode::Char('q') | KeyCode::Esc => self.exit = true,
KeyCode::Char('j') | KeyCode::Down => self.y += 1.0,
KeyCode::Char('k') | KeyCode::Up => self.y -= 1.0,
KeyCode::Char('l') | KeyCode::Right => self.x += 1.0,
KeyCode::Char('h') | KeyCode::Left => self.x -= 1.0,
KeyCode::Enter => self.cycle_marker(),
_ => {}
}
}
fn handle_mouse_event(&mut self, event: event::MouseEvent) {
match event.kind {
MouseEventKind::Down(_) => self.is_drawing = true,
MouseEventKind::Up(_) => self.is_drawing = false,
MouseEventKind::Drag(_) => {
self.points.push(Position::new(event.column, event.row));
}
_ => {}
}
}
const fn cycle_marker(&mut self) {
self.marker = match self.marker {
Marker::Dot => Marker::Braille,
Marker::Braille => Marker::Block,
Marker::Block => Marker::HalfBlock,
Marker::HalfBlock => Marker::Quadrant,
Marker::Quadrant => Marker::Sextant,
Marker::Sextant => Marker::Octant,
Marker::Octant => Marker::Bar,
Marker::Bar => Marker::Dot,
_ => unreachable!(),
};
}
fn on_tick(&mut self) {
// bounce the ball by flipping the velocity vector
let ball = &self.ball;
let playground = self.playground;
if ball.x - ball.radius < f64::from(playground.left())
|| ball.x + ball.radius > f64::from(playground.right())
{
self.vx = -self.vx;
}
if ball.y - ball.radius < f64::from(playground.top())
|| ball.y + ball.radius > f64::from(playground.bottom())
{
self.vy = -self.vy;
}
self.ball.x += self.vx;
self.ball.y += self.vy;
}
fn render(&self, frame: &mut Frame) {
let header = Text::from_iter([
"Canvas Example".bold(),
"<q> Quit | <enter> Change Marker | <hjkl> Move".into(),
]);
let vertical = Layout::vertical([
Constraint::Length(header.height() as u16),
Constraint::Fill(1),
Constraint::Fill(1),
]);
let [text_area, up, down] = frame.area().layout(&vertical);
frame.render_widget(header.centered(), text_area);
let horizontal = Layout::horizontal([Constraint::Fill(1); 2]);
let [draw, pong] = up.layout(&horizontal);
let [map, boxes] = down.layout(&horizontal);
frame.render_widget(self.map_canvas(), map);
frame.render_widget(self.draw_canvas(draw), draw);
frame.render_widget(self.pong_canvas(), pong);
frame.render_widget(self.boxes_canvas(boxes), boxes);
}
fn map_canvas(&self) -> impl Widget + '_ {
Canvas::default()
.block(Block::bordered().title("World"))
.marker(self.marker)
.paint(|ctx| {
ctx.draw(&Map {
color: Color::Green,
resolution: MapResolution::High,
});
ctx.print(self.x, -self.y, "You are here".yellow());
})
.x_bounds([-180.0, 180.0])
.y_bounds([-90.0, 90.0])
}
fn draw_canvas(&self, area: Rect) -> impl Widget + '_ {
Canvas::default()
.block(Block::bordered().title("Draw here"))
.marker(self.marker)
.x_bounds([0.0, f64::from(area.width)])
.y_bounds([0.0, f64::from(area.height)])
.paint(move |ctx| {
let points = self
.points
.iter()
.map(|p| {
(
f64::from(p.x) - f64::from(area.left()),
f64::from(area.bottom()) - f64::from(p.y),
)
})
.collect_vec();
ctx.draw(&Points {
coords: &points,
color: Color::White,
});
})
}
fn pong_canvas(&self) -> impl Widget + '_ {
Canvas::default()
.block(Block::bordered().title("Pong"))
.marker(self.marker)
.paint(|ctx| {
ctx.draw(&self.ball);
})
.x_bounds([10.0, 210.0])
.y_bounds([10.0, 110.0])
}
fn boxes_canvas(&self, area: Rect) -> impl Widget {
let left = 0.0;
let right = f64::from(area.width);
let bottom = 0.0;
let top = f64::from(area.height).mul_add(2.0, -4.0);
Canvas::default()
.block(Block::bordered().title("Rects"))
.marker(self.marker)
.x_bounds([left, right])
.y_bounds([bottom, top])
.paint(|ctx| {
for i in 0..=11 {
ctx.draw(&Rectangle {
x: f64::from(i * i + 3 * i) / 2.0 + 2.0,
y: 2.0,
width: f64::from(i),
height: f64::from(i),
color: Color::Red,
});
ctx.draw(&Rectangle {
x: f64::from(i * i + 3 * i) / 2.0 + 2.0,
y: 21.0,
width: f64::from(i),
height: f64::from(i),
color: Color::Blue,
});
}
for i in 0..100 {
if i % 10 != 0 {
ctx.print(f64::from(i) + 1.0, 0.0, format!("{i}", i = i % 10));
}
if i % 2 == 0 && i % 10 != 0 {
ctx.print(0.0, f64::from(i), format!("{i}", i = i % 10));
}
}
})
}
}

View File

@@ -1,14 +0,0 @@
[package]
name = "chart"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
ratatui.workspace = true
[lints]
workspace = true

View File

@@ -1,9 +0,0 @@
# Chart demo
This example shows how to render line, bar, and scatter charts.
To run this demo:
```shell
cargo run -p chart
```

View File

@@ -1,352 +0,0 @@
/// A Ratatui example that demonstrates how to handle charts.
///
/// This example demonstrates how to draw various types of charts such as line, bar, and
/// scatter charts.
///
/// This example runs with the Ratatui library code in the branch that you are currently
/// reading. See the [`latest`] branch for the code which works with the most recent Ratatui
/// release.
///
/// [`latest`]: https://github.com/ratatui/ratatui/tree/latest
use std::time::{Duration, Instant};
use color_eyre::Result;
use crossterm::event::{self, KeyCode};
use ratatui::layout::{Constraint, Layout, Rect};
use ratatui::style::{Color, Modifier, Style, Stylize};
use ratatui::symbols::{self, Marker};
use ratatui::text::{Line, Span};
use ratatui::widgets::{Axis, Block, Chart, Dataset, GraphType, LegendPosition};
use ratatui::{DefaultTerminal, Frame};
fn main() -> Result<()> {
color_eyre::install()?;
ratatui::run(|terminal| App::new().run(terminal))
}
struct App {
signal1: SinSignal,
data1: Vec<(f64, f64)>,
signal2: SinSignal,
data2: Vec<(f64, f64)>,
window: [f64; 2],
}
#[derive(Clone)]
struct SinSignal {
x: f64,
interval: f64,
period: f64,
scale: f64,
}
impl SinSignal {
const fn new(interval: f64, period: f64, scale: f64) -> Self {
Self {
x: 0.0,
interval,
period,
scale,
}
}
}
impl Iterator for SinSignal {
type Item = (f64, f64);
fn next(&mut self) -> Option<Self::Item> {
let point = (self.x, (self.x * 1.0 / self.period).sin() * self.scale);
self.x += self.interval;
Some(point)
}
}
impl App {
fn new() -> Self {
let mut signal1 = SinSignal::new(0.2, 3.0, 18.0);
let mut signal2 = SinSignal::new(0.1, 2.0, 10.0);
let data1 = signal1.by_ref().take(200).collect::<Vec<(f64, f64)>>();
let data2 = signal2.by_ref().take(200).collect::<Vec<(f64, f64)>>();
Self {
signal1,
data1,
signal2,
data2,
window: [0.0, 20.0],
}
}
fn run(mut self, terminal: &mut DefaultTerminal) -> Result<()> {
let tick_rate = Duration::from_millis(250);
let mut last_tick = Instant::now();
loop {
terminal.draw(|frame| self.render(frame))?;
let timeout = tick_rate.saturating_sub(last_tick.elapsed());
if !event::poll(timeout)? {
self.on_tick();
last_tick = Instant::now();
continue;
}
if event::read()?
.as_key_press_event()
.is_some_and(|key| key.code == KeyCode::Char('q'))
{
return Ok(());
}
}
}
fn on_tick(&mut self) {
self.data1.drain(0..5);
self.data1.extend(self.signal1.by_ref().take(5));
self.data2.drain(0..10);
self.data2.extend(self.signal2.by_ref().take(10));
self.window[0] += 1.0;
self.window[1] += 1.0;
}
fn render(&self, frame: &mut Frame) {
let vertical = Layout::vertical([Constraint::Fill(1); 2]);
let [top, bottom] = frame.area().layout(&vertical);
let horizontal = Layout::horizontal([Constraint::Fill(1), Constraint::Length(29)]);
let [animated_chart, bar_chart] = top.layout(&horizontal);
let [line_chart, scatter] = bottom.layout(&Layout::horizontal([Constraint::Fill(1); 2]));
self.render_animated_chart(frame, animated_chart);
render_barchart(frame, bar_chart);
render_line_chart(frame, line_chart);
render_scatter(frame, scatter);
}
fn render_animated_chart(&self, frame: &mut Frame, area: Rect) {
let x_labels = vec![
Span::styled(
format!("{}", self.window[0]),
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw(format!("{}", f64::midpoint(self.window[0], self.window[1]))),
Span::styled(
format!("{}", self.window[1]),
Style::default().add_modifier(Modifier::BOLD),
),
];
let datasets = vec![
Dataset::default()
.name("data2")
.marker(symbols::Marker::Dot)
.style(Style::default().fg(Color::Cyan))
.data(&self.data1),
Dataset::default()
.name("data3")
.marker(symbols::Marker::Braille)
.style(Style::default().fg(Color::Yellow))
.data(&self.data2),
];
let chart = Chart::new(datasets)
.block(Block::bordered())
.x_axis(
Axis::default()
.title("X Axis")
.style(Style::default().fg(Color::Gray))
.labels(x_labels)
.bounds(self.window),
)
.y_axis(
Axis::default()
.title("Y Axis")
.style(Style::default().fg(Color::Gray))
.labels(["-20".bold(), "0".into(), "20".bold()])
.bounds([-20.0, 20.0]),
);
frame.render_widget(chart, area);
}
}
fn render_barchart(frame: &mut Frame, bar_chart: Rect) {
let dataset = Dataset::default()
.marker(symbols::Marker::HalfBlock)
.style(Style::new().fg(Color::Blue))
.graph_type(GraphType::Bar)
// a bell curve
.data(&[
(0., 0.4),
(10., 2.9),
(20., 13.5),
(30., 41.1),
(40., 80.1),
(50., 100.0),
(60., 80.1),
(70., 41.1),
(80., 13.5),
(90., 2.9),
(100., 0.4),
]);
let chart = Chart::new(vec![dataset])
.block(Block::bordered().title_top(Line::from("Bar chart").cyan().bold().centered()))
.x_axis(
Axis::default()
.style(Style::default().gray())
.bounds([0.0, 100.0])
.labels(["0".bold(), "50".into(), "100.0".bold()]),
)
.y_axis(
Axis::default()
.style(Style::default().gray())
.bounds([0.0, 100.0])
.labels(["0".bold(), "50".into(), "100.0".bold()]),
)
.hidden_legend_constraints((Constraint::Ratio(1, 2), Constraint::Ratio(1, 2)));
frame.render_widget(chart, bar_chart);
}
fn render_line_chart(frame: &mut Frame, area: Rect) {
let datasets = vec![
Dataset::default()
.name("Line from only 2 points".italic())
.marker(symbols::Marker::Braille)
.style(Style::default().fg(Color::Yellow))
.graph_type(GraphType::Line)
.data(&[(1., 1.), (4., 4.)]),
];
let chart = Chart::new(datasets)
.block(Block::bordered().title(Line::from("Line chart").cyan().bold().centered()))
.x_axis(
Axis::default()
.title("X Axis")
.style(Style::default().gray())
.bounds([0.0, 5.0])
.labels(["0".bold(), "2.5".into(), "5.0".bold()]),
)
.y_axis(
Axis::default()
.title("Y Axis")
.style(Style::default().gray())
.bounds([0.0, 5.0])
.labels(["0".bold(), "2.5".into(), "5.0".bold()]),
)
.legend_position(Some(LegendPosition::TopLeft))
.hidden_legend_constraints((Constraint::Ratio(1, 2), Constraint::Ratio(1, 2)));
frame.render_widget(chart, area);
}
fn render_scatter(frame: &mut Frame, area: Rect) {
let datasets = vec![
Dataset::default()
.name("Heavy")
.marker(Marker::Dot)
.graph_type(GraphType::Scatter)
.style(Style::new().yellow())
.data(&HEAVY_PAYLOAD_DATA),
Dataset::default()
.name("Medium".underlined())
.marker(Marker::Braille)
.graph_type(GraphType::Scatter)
.style(Style::new().magenta())
.data(&MEDIUM_PAYLOAD_DATA),
Dataset::default()
.name("Small")
.marker(Marker::Dot)
.graph_type(GraphType::Scatter)
.style(Style::new().cyan())
.data(&SMALL_PAYLOAD_DATA),
];
let chart = Chart::new(datasets)
.block(Block::bordered().title(Line::from("Scatter chart").cyan().bold().centered()))
.x_axis(
Axis::default()
.title("Year")
.bounds([1960., 2020.])
.style(Style::default().fg(Color::Gray))
.labels(["1960", "1990", "2020"]),
)
.y_axis(
Axis::default()
.title("Cost")
.bounds([0., 75000.])
.style(Style::default().fg(Color::Gray))
.labels(["0", "37 500", "75 000"]),
)
.hidden_legend_constraints((Constraint::Ratio(1, 2), Constraint::Ratio(1, 2)));
frame.render_widget(chart, area);
}
// Data from https://ourworldindata.org/space-exploration-satellites
const HEAVY_PAYLOAD_DATA: [(f64, f64); 9] = [
(1965., 8200.),
(1967., 5400.),
(1981., 65400.),
(1989., 30800.),
(1997., 10200.),
(2004., 11600.),
(2014., 4500.),
(2016., 7900.),
(2018., 1500.),
];
const MEDIUM_PAYLOAD_DATA: [(f64, f64); 29] = [
(1963., 29500.),
(1964., 30600.),
(1965., 177_900.),
(1965., 21000.),
(1966., 17900.),
(1966., 8400.),
(1975., 17500.),
(1982., 8300.),
(1985., 5100.),
(1988., 18300.),
(1990., 38800.),
(1990., 9900.),
(1991., 18700.),
(1992., 9100.),
(1994., 10500.),
(1994., 8500.),
(1994., 8700.),
(1997., 6200.),
(1999., 18000.),
(1999., 7600.),
(1999., 8900.),
(1999., 9600.),
(2000., 16000.),
(2001., 10000.),
(2002., 10400.),
(2002., 8100.),
(2010., 2600.),
(2013., 13600.),
(2017., 8000.),
];
const SMALL_PAYLOAD_DATA: [(f64, f64); 23] = [
(1961., 118_500.),
(1962., 14900.),
(1975., 21400.),
(1980., 32800.),
(1988., 31100.),
(1990., 41100.),
(1993., 23600.),
(1994., 20600.),
(1994., 34600.),
(1996., 50600.),
(1997., 19200.),
(1997., 45800.),
(1998., 19100.),
(2000., 73100.),
(2003., 11200.),
(2008., 12600.),
(2010., 30500.),
(2012., 20000.),
(2013., 10600.),
(2013., 34500.),
(2015., 10600.),
(2018., 23100.),
(2019., 17300.),
];

View File

@@ -1,15 +0,0 @@
[package]
name = "color-explorer"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
itertools.workspace = true
ratatui.workspace = true
[lints]
workspace = true

View File

@@ -1,9 +0,0 @@
# Color explorer demo
This example shows how to handle the supported colors.
To run this demo:
```shell
cargo run -p color-explorer
```

View File

@@ -1,232 +0,0 @@
//! A Ratatui example that demonstrates how to handle colors.
//!
//! This example shows all the colors supported by Ratatui. It will render a grid of foreground
//! and background colors with their names and indexes.
//!
//! This example runs with the Ratatui library code in the branch that you are currently reading.
//! See the [`latest`] branch for the code which works with the most recent Ratatui release.
//!
//! [`latest`]: https://github.com/ratatui/ratatui/tree/latest
use color_eyre::Result;
use crossterm::event;
use itertools::Itertools;
use ratatui::Frame;
use ratatui::layout::{Alignment, Constraint, Layout, Rect};
use ratatui::style::{Color, Style, Stylize};
use ratatui::text::Line;
use ratatui::widgets::{Block, Borders, Paragraph};
fn main() -> Result<()> {
color_eyre::install()?;
ratatui::run(|terminal| {
loop {
terminal.draw(render)?;
if event::read()?.is_key_press() {
return Ok(());
}
}
})
}
fn render(frame: &mut Frame) {
let [named, indexed_colors, indexed_greys] = Layout::vertical([
Constraint::Length(30),
Constraint::Length(17),
Constraint::Length(2),
])
.areas(frame.area());
render_named_colors(frame, named);
render_indexed_colors(frame, indexed_colors);
render_indexed_grayscale(frame, indexed_greys);
}
const NAMED_COLORS: [Color; 16] = [
Color::Black,
Color::Red,
Color::Green,
Color::Yellow,
Color::Blue,
Color::Magenta,
Color::Cyan,
Color::Gray,
Color::DarkGray,
Color::LightRed,
Color::LightGreen,
Color::LightYellow,
Color::LightBlue,
Color::LightMagenta,
Color::LightCyan,
Color::White,
];
fn render_named_colors(frame: &mut Frame, area: Rect) {
let layout = Layout::vertical([Constraint::Length(3); 10]).split(area);
render_fg_named_colors(frame, Color::Reset, layout[0]);
render_fg_named_colors(frame, Color::Black, layout[1]);
render_fg_named_colors(frame, Color::DarkGray, layout[2]);
render_fg_named_colors(frame, Color::Gray, layout[3]);
render_fg_named_colors(frame, Color::White, layout[4]);
render_bg_named_colors(frame, Color::Reset, layout[5]);
render_bg_named_colors(frame, Color::Black, layout[6]);
render_bg_named_colors(frame, Color::DarkGray, layout[7]);
render_bg_named_colors(frame, Color::Gray, layout[8]);
render_bg_named_colors(frame, Color::White, layout[9]);
}
fn render_fg_named_colors(frame: &mut Frame, bg: Color, area: Rect) {
let block = title_block(format!("Foreground colors on {bg} background"));
let inner = block.inner(area);
frame.render_widget(block, area);
let vertical = Layout::vertical([Constraint::Length(1); 2]);
let horizontal = Layout::horizontal([Constraint::Ratio(1, 8); 8]);
let areas = inner
.layout_vec(&vertical)
.into_iter()
.flat_map(|area| area.layout_vec(&horizontal));
for (fg, area) in NAMED_COLORS.into_iter().zip(areas) {
let color_name = fg.to_string();
let paragraph = Paragraph::new(color_name).fg(fg).bg(bg);
frame.render_widget(paragraph, area);
}
}
fn render_bg_named_colors(frame: &mut Frame, fg: Color, area: Rect) {
let block = title_block(format!("Background colors with {fg} foreground"));
let inner = block.inner(area);
frame.render_widget(block, area);
let vertical = Layout::vertical([Constraint::Length(1); 2]);
let horizontal = Layout::horizontal([Constraint::Ratio(1, 8); 8]);
let areas = inner
.layout_vec(&vertical)
.into_iter()
.flat_map(|area| area.layout_vec(&horizontal));
for (bg, area) in NAMED_COLORS.into_iter().zip(areas) {
let color_name = bg.to_string();
let paragraph = Paragraph::new(color_name).fg(fg).bg(bg);
frame.render_widget(paragraph, area);
}
}
fn render_indexed_colors(frame: &mut Frame, area: Rect) {
let block = title_block("Indexed colors".into());
let inner = block.inner(area);
frame.render_widget(block, area);
let layout = Layout::vertical([
Constraint::Length(1), // 0 - 15
Constraint::Length(1), // blank
Constraint::Min(6), // 16 - 123
Constraint::Length(1), // blank
Constraint::Min(6), // 124 - 231
Constraint::Length(1), // blank
])
.split(inner);
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
let color_layout = Layout::horizontal([Constraint::Length(5); 16]).split(layout[0]);
for i in 0..16 {
let color = Color::Indexed(i);
let color_index = format!("{i:0>2}");
let bg = if i < 1 { Color::DarkGray } else { Color::Black };
let paragraph = Paragraph::new(Line::from(vec![
color_index.fg(color).bg(bg),
"██".bg(color).fg(color),
]));
frame.render_widget(paragraph, color_layout[i as usize]);
}
// 16 17 18 19 20 21 52 53 54 55 56 57 88 89 90 91 92 93
// 22 23 24 25 26 27 58 59 60 61 62 63 94 95 96 97 98 99
// 28 29 30 31 32 33 64 65 66 67 68 69 100 101 102 103 104 105
// 34 35 36 37 38 39 70 71 72 73 74 75 106 107 108 109 110 111
// 40 41 42 43 44 45 76 77 78 79 80 81 112 113 114 115 116 117
// 46 47 48 49 50 51 82 83 84 85 86 87 118 119 120 121 122 123
//
// 124 125 126 127 128 129 160 161 162 163 164 165 196 197 198 199 200 201
// 130 131 132 133 134 135 166 167 168 169 170 171 202 203 204 205 206 207
// 136 137 138 139 140 141 172 173 174 175 176 177 208 209 210 211 212 213
// 142 143 144 145 146 147 178 179 180 181 182 183 214 215 216 217 218 219
// 148 149 150 151 152 153 184 185 186 187 188 189 220 221 222 223 224 225
// 154 155 156 157 158 159 190 191 192 193 194 195 226 227 228 229 230 231
// the above looks complex but it's so the colors are grouped into blocks that display nicely
let index_layout = [layout[2], layout[4]]
.iter()
// two rows of 3 columns
.flat_map(|area| {
Layout::horizontal([Constraint::Length(27); 3])
.split(*area)
.to_vec()
})
// each with 6 rows
.flat_map(|area| {
Layout::vertical([Constraint::Length(1); 6])
.split(area)
.to_vec()
})
// each with 6 columns
.flat_map(|area| {
Layout::horizontal([Constraint::Min(4); 6])
.split(area)
.to_vec()
})
.collect_vec();
for i in 16..=231 {
let color = Color::Indexed(i);
let color_index = format!("{i:0>3}");
let paragraph = Paragraph::new(Line::from(vec![
color_index.fg(color).bg(Color::Reset),
".".bg(color).fg(color),
// There's a bug in VHS that seems to bleed backgrounds into the next
// character. This is a workaround to make the bug less obvious.
"███".reversed(),
]));
frame.render_widget(paragraph, index_layout[i as usize - 16]);
}
}
fn title_block(title: String) -> Block<'static> {
Block::new()
.borders(Borders::TOP)
.title_alignment(Alignment::Center)
.border_style(Style::new().dark_gray())
.title_style(Style::reset())
.title(title)
}
fn render_indexed_grayscale(frame: &mut Frame, area: Rect) {
let layout = Layout::vertical([
Constraint::Length(1), // 232 - 243
Constraint::Length(1), // 244 - 255
])
.split(area)
.iter()
.flat_map(|area| {
Layout::horizontal([Constraint::Length(6); 12])
.split(*area)
.to_vec()
})
.collect_vec();
for i in 232..=255 {
let color = Color::Indexed(i);
let color_index = format!("{i:0>3}");
// make the dark colors easier to read
let bg = if i < 244 { Color::Gray } else { Color::Black };
let paragraph = Paragraph::new(Line::from(vec![
color_index.fg(color).bg(bg),
"██".bg(color).fg(color),
// There's a bug in VHS that seems to bleed backgrounds into the next
// character. This is a workaround to make the bug less obvious.
"███████".reversed(),
]));
frame.render_widget(paragraph, layout[i as usize - 232]);
}
}

View File

@@ -1,15 +0,0 @@
[package]
name = "colors-rgb"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
palette.workspace = true
ratatui.workspace = true
[lints]
workspace = true

View File

@@ -1,9 +0,0 @@
# Colors-RGB demo
This example shows the full range of RGB colors in an animation.
To run this demo:
```shell
cargo run -p colors-rgb
```

View File

@@ -1,239 +0,0 @@
//! A Ratatui example that shows the full range of RGB colors that can be displayed in the terminal.
//!
//! Requires a terminal that supports 24-bit color (true color) and unicode.
//!
//! This example also demonstrates how implementing the Widget trait on a mutable reference
//! allows the widget to update its state while it is being rendered. This allows the fps
//! widget to update the fps calculation and the colors widget to update a cached version of
//! the colors to render instead of recalculating them every frame.
//!
//! This is an alternative to using the `StatefulWidget` trait and a separate state struct. It
//! is useful when the state is only used by the widget and doesn't need to be shared with
//! other widgets.
//!
//! This example runs with the Ratatui library code in the branch that you are currently reading.
//! See the [`latest`] branch for the code which works with the most recent Ratatui release.
//!
//! [`latest`]: https://github.com/ratatui/ratatui/tree/latest
use std::time::{Duration, Instant};
use color_eyre::Result;
use crossterm::event;
use palette::convert::FromColorUnclamped;
use palette::{Okhsv, Srgb};
use ratatui::DefaultTerminal;
use ratatui::buffer::Buffer;
use ratatui::layout::{Constraint, Layout, Position, Rect};
use ratatui::style::Color;
use ratatui::text::Text;
use ratatui::widgets::Widget;
fn main() -> Result<()> {
color_eyre::install()?;
ratatui::run(|terminal| App::default().run(terminal))
}
#[derive(Debug, Default)]
struct App {
/// The current state of the app (running or quit)
state: AppState,
/// A widget that displays the current frames per second
fps_widget: FpsWidget,
/// A widget that displays the full range of RGB colors that can be displayed in the terminal.
colors_widget: ColorsWidget,
}
#[derive(Debug, Default, PartialEq, Eq)]
enum AppState {
/// The app is running
#[default]
Running,
/// The user has requested the app to quit
Quit,
}
/// A widget that displays the current frames per second
#[derive(Debug)]
struct FpsWidget {
/// The number of elapsed frames that have passed - used to calculate the fps
frame_count: usize,
/// The last instant that the fps was calculated
last_instant: Instant,
/// The current frames per second
fps: Option<f32>,
}
/// A widget that displays the full range of RGB colors that can be displayed in the terminal.
///
/// This widget is animated and will change colors over time.
#[derive(Debug, Default)]
struct ColorsWidget {
/// The colors to render - should be double the height of the area as we render two rows of
/// pixels for each row of the widget using the half block character. This is computed any time
/// the size of the widget changes.
colors: Vec<Vec<Color>>,
/// the number of elapsed frames that have passed - used to animate the colors by shifting the
/// x index by the frame number
frame_count: usize,
}
impl App {
/// Run the app
///
/// This is the main event loop for the app.
pub fn run(mut self, terminal: &mut DefaultTerminal) -> Result<()> {
while self.is_running() {
terminal.draw(|frame| frame.render_widget(&mut self, frame.area()))?;
self.handle_events()?;
}
Ok(())
}
const fn is_running(&self) -> bool {
matches!(self.state, AppState::Running)
}
/// Handle any events that have occurred since the last time the app was rendered.
fn handle_events(&mut self) -> Result<()> {
// Ensure that the app only blocks for a period that allows the app to render at
// approximately 60 FPS (this doesn't account for the time to render the frame, and will
// also update the app immediately any time an event occurs)
let timeout = Duration::from_secs_f32(1.0 / 60.0);
if !event::poll(timeout)? {
return Ok(());
}
if event::read()?.is_key_press() {
self.state = AppState::Quit;
}
Ok(())
}
}
/// Implement the Widget trait for &mut App so that it can be rendered
///
/// This is implemented on a mutable reference so that the app can update its state while it is
/// being rendered. This allows the fps widget to update the fps calculation and the colors widget
/// to update the colors to render.
impl Widget for &mut App {
fn render(self, area: Rect, buf: &mut Buffer) {
use Constraint::{Length, Min};
let [top, colors] = area.layout(&Layout::vertical([Length(1), Min(0)]));
let [title, fps] = top.layout(&Layout::horizontal([Min(0), Length(8)]));
Text::from("colors_rgb example. Press q to quit")
.centered()
.render(title, buf);
self.fps_widget.render(fps, buf);
self.colors_widget.render(colors, buf);
}
}
/// Default impl for `FpsWidget`
///
/// Manual impl is required because we need to initialize the `last_instant` field to the current
/// instant.
impl Default for FpsWidget {
fn default() -> Self {
Self {
frame_count: 0,
last_instant: Instant::now(),
fps: None,
}
}
}
/// Widget impl for `FpsWidget`
///
/// This is implemented on a mutable reference so that we can update the frame count and fps
/// calculation while rendering.
impl Widget for &mut FpsWidget {
fn render(self, area: Rect, buf: &mut Buffer) {
self.calculate_fps();
if let Some(fps) = self.fps {
let text = format!("{fps:.1} fps");
Text::from(text).render(area, buf);
}
}
}
impl FpsWidget {
/// Update the fps calculation.
///
/// This updates the fps once a second, but only if the widget has rendered at least 2 frames
/// since the last calculation. This avoids noise in the fps calculation when rendering on slow
/// machines that can't render at least 2 frames per second.
#[expect(clippy::cast_precision_loss)]
fn calculate_fps(&mut self) {
self.frame_count += 1;
let elapsed = self.last_instant.elapsed();
if elapsed > Duration::from_secs(1) && self.frame_count > 2 {
self.fps = Some(self.frame_count as f32 / elapsed.as_secs_f32());
self.frame_count = 0;
self.last_instant = Instant::now();
}
}
}
/// Widget impl for `ColorsWidget`
///
/// This is implemented on a mutable reference so that we can update the frame count and store a
/// cached version of the colors to render instead of recalculating them every frame.
impl Widget for &mut ColorsWidget {
/// Render the widget
fn render(self, area: Rect, buf: &mut Buffer) {
self.setup_colors(area);
let colors = &self.colors;
for (xi, x) in (area.left()..area.right()).enumerate() {
// animate the colors by shifting the x index by the frame number
let xi = (xi + self.frame_count) % (area.width as usize);
for (yi, y) in (area.top()..area.bottom()).enumerate() {
// render a half block character for each row of pixels with the foreground color
// set to the color of the pixel and the background color set to the color of the
// pixel below it
let fg = colors[yi * 2][xi];
let bg = colors[yi * 2 + 1][xi];
buf[Position::new(x, y)].set_char('▀').set_fg(fg).set_bg(bg);
}
}
self.frame_count += 1;
}
}
impl ColorsWidget {
/// Setup the colors to render.
///
/// This is called once per frame to setup the colors to render. It caches the colors so that
/// they don't need to be recalculated every frame.
#[expect(clippy::cast_precision_loss)]
fn setup_colors(&mut self, size: Rect) {
let Rect { width, height, .. } = size;
// double the height because each screen row has two rows of half block pixels
let height = height as usize * 2;
let width = width as usize;
// only update the colors if the size has changed since the last time we rendered
if self.colors.len() == height && self.colors[0].len() == width {
return;
}
self.colors = Vec::with_capacity(height);
for y in 0..height {
let mut row = Vec::with_capacity(width);
for x in 0..width {
let hue = x as f32 * 360.0 / width as f32;
let value = (height - y) as f32 / height as f32;
let saturation = Okhsv::max_saturation();
let color = Okhsv::new(hue, saturation, value);
let color = Srgb::<f32>::from_color_unclamped(color);
let color: Srgb<u8> = color.into_format();
let color = Color::Rgb(color.red, color.green, color.blue);
row.push(color);
}
self.colors.push(row);
}
}
}

View File

@@ -1,16 +0,0 @@
[package]
name = "constraint-explorer"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
itertools.workspace = true
ratatui.workspace = true
strum.workspace = true
[lints]
workspace = true

View File

@@ -1,9 +0,0 @@
# Constraint explorer demo
This interactive example shows how different constraints can be used to layout widgets.
To run this demo:
```shell
cargo run -p constraint-explorer
```

View File

@@ -1,605 +0,0 @@
use std::cmp::Ordering;
/// A Ratatui example that demonstrates how different layout constraints work.
///
/// It also supports swapping constraints, adding and removing blocks, and changing the spacing
/// between blocks.
///
/// This example runs with the Ratatui library code in the branch that you are currently
/// reading. See the [`latest`] branch for the code which works with the most recent Ratatui
/// release.
///
/// [`latest`]: https://github.com/ratatui/ratatui/tree/latest
use color_eyre::Result;
use crossterm::event::{self, KeyCode};
use itertools::Itertools;
use ratatui::DefaultTerminal;
use ratatui::buffer::Buffer;
use ratatui::layout::Constraint::{self, Fill, Length, Max, Min, Percentage, Ratio};
use ratatui::layout::{Flex, Layout, Rect};
use ratatui::style::palette::tailwind::{BLUE, SKY, SLATE, STONE};
use ratatui::style::{Color, Style, Stylize};
use ratatui::symbols::{self, line};
use ratatui::text::{Line, Span, Text};
use ratatui::widgets::{Block, Paragraph, Widget, Wrap};
use strum::{Display, EnumIter, FromRepr};
fn main() -> Result<()> {
color_eyre::install()?;
ratatui::run(|terminal| App::default().run(terminal))
}
#[derive(Default)]
struct App {
mode: AppMode,
spacing: i16,
constraints: Vec<Constraint>,
selected_index: usize,
value: u16,
}
#[derive(Debug, Default, PartialEq, Eq)]
enum AppMode {
#[default]
Running,
Quit,
}
/// A variant of [`Constraint`] that can be rendered as a tab.
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, EnumIter, FromRepr, Display)]
enum ConstraintName {
#[default]
Length,
Percentage,
Ratio,
Min,
Max,
Fill,
}
/// A widget that renders a [`Constraint`] as a block. E.g.:
/// ```plain
/// ┌──────────────┐
/// │ Length(16) │
/// │ 16px │
/// └──────────────┘
/// ```
struct ConstraintBlock {
constraint: Constraint,
legend: bool,
selected: bool,
}
/// A widget that renders a spacer with a label indicating the width of the spacer. E.g.:
///
/// ```plain
/// ┌ ┐
/// 8 px
/// └ ┘
/// ```
struct SpacerBlock;
// App behaviour
impl App {
fn run(mut self, terminal: &mut DefaultTerminal) -> Result<()> {
self.insert_test_defaults();
while self.is_running() {
terminal.draw(|frame| frame.render_widget(&self, frame.area()))?;
self.handle_events()?;
}
Ok(())
}
// TODO remove these - these are just for testing
fn insert_test_defaults(&mut self) {
self.constraints = vec![
Constraint::Length(20),
Constraint::Length(20),
Constraint::Length(20),
];
self.value = 20;
}
fn is_running(&self) -> bool {
self.mode == AppMode::Running
}
fn handle_events(&mut self) -> Result<()> {
if let Some(key) = event::read()?.as_key_press_event() {
match key.code {
KeyCode::Char('q') | KeyCode::Esc => self.exit(),
KeyCode::Char('1') => self.swap_constraint(ConstraintName::Min),
KeyCode::Char('2') => self.swap_constraint(ConstraintName::Max),
KeyCode::Char('3') => self.swap_constraint(ConstraintName::Length),
KeyCode::Char('4') => self.swap_constraint(ConstraintName::Percentage),
KeyCode::Char('5') => self.swap_constraint(ConstraintName::Ratio),
KeyCode::Char('6') => self.swap_constraint(ConstraintName::Fill),
KeyCode::Char('+') => self.increment_spacing(),
KeyCode::Char('-') => self.decrement_spacing(),
KeyCode::Char('x') => self.delete_block(),
KeyCode::Char('a') => self.insert_block(),
KeyCode::Char('k') | KeyCode::Up => self.increment_value(),
KeyCode::Char('j') | KeyCode::Down => self.decrement_value(),
KeyCode::Char('h') | KeyCode::Left => self.prev_block(),
KeyCode::Char('l') | KeyCode::Right => self.next_block(),
_ => {}
}
}
Ok(())
}
fn increment_value(&mut self) {
let Some(constraint) = self.constraints.get_mut(self.selected_index) else {
return;
};
match constraint {
Constraint::Length(v)
| Constraint::Min(v)
| Constraint::Max(v)
| Constraint::Fill(v)
| Constraint::Percentage(v) => *v = v.saturating_add(1),
Constraint::Ratio(_n, d) => *d = d.saturating_add(1),
}
}
fn decrement_value(&mut self) {
let Some(constraint) = self.constraints.get_mut(self.selected_index) else {
return;
};
match constraint {
Constraint::Length(v)
| Constraint::Min(v)
| Constraint::Max(v)
| Constraint::Fill(v)
| Constraint::Percentage(v) => *v = v.saturating_sub(1),
Constraint::Ratio(_n, d) => *d = d.saturating_sub(1),
}
}
/// select the next block with wrap around
fn next_block(&mut self) {
if self.constraints.is_empty() {
return;
}
let len = self.constraints.len();
self.selected_index = (self.selected_index + 1) % len;
}
/// select the previous block with wrap around
fn prev_block(&mut self) {
if self.constraints.is_empty() {
return;
}
let len = self.constraints.len();
self.selected_index = (self.selected_index + self.constraints.len() - 1) % len;
}
/// delete the selected block
fn delete_block(&mut self) {
if self.constraints.is_empty() {
return;
}
self.constraints.remove(self.selected_index);
self.selected_index = self.selected_index.saturating_sub(1);
}
/// insert a block after the selected block
fn insert_block(&mut self) {
let index = self
.selected_index
.saturating_add(1)
.min(self.constraints.len());
let constraint = Constraint::Length(self.value);
self.constraints.insert(index, constraint);
self.selected_index = index;
}
const fn increment_spacing(&mut self) {
self.spacing = self.spacing.saturating_add(1);
}
const fn decrement_spacing(&mut self) {
self.spacing = self.spacing.saturating_sub(1);
}
const fn exit(&mut self) {
self.mode = AppMode::Quit;
}
fn swap_constraint(&mut self, name: ConstraintName) {
if self.constraints.is_empty() {
return;
}
let constraint = match name {
ConstraintName::Length => Length(self.value),
ConstraintName::Percentage => Percentage(self.value),
ConstraintName::Min => Min(self.value),
ConstraintName::Max => Max(self.value),
ConstraintName::Fill => Fill(self.value),
ConstraintName::Ratio => Ratio(1, u32::from(self.value) / 4), // for balance
};
self.constraints[self.selected_index] = constraint;
}
}
impl From<Constraint> for ConstraintName {
fn from(constraint: Constraint) -> Self {
match constraint {
Length(_) => Self::Length,
Percentage(_) => Self::Percentage,
Ratio(_, _) => Self::Ratio,
Min(_) => Self::Min,
Max(_) => Self::Max,
Fill(_) => Self::Fill,
}
}
}
impl Widget for &App {
fn render(self, area: Rect, buf: &mut Buffer) {
let [
header_area,
instructions_area,
swap_legend_area,
_,
blocks_area,
] = area.layout(&Layout::vertical([
Length(2), // header
Length(2), // instructions
Length(1), // swap key legend
Length(1), // gap
Fill(1), // blocks
]));
App::header().render(header_area, buf);
App::instructions().render(instructions_area, buf);
App::swap_legend().render(swap_legend_area, buf);
self.render_layout_blocks(blocks_area, buf);
}
}
// App rendering
impl App {
const HEADER_COLOR: Color = SLATE.c200;
const TEXT_COLOR: Color = SLATE.c400;
const AXIS_COLOR: Color = SLATE.c500;
fn header() -> impl Widget {
let text = "Constraint Explorer";
text.bold().fg(Self::HEADER_COLOR).into_centered_line()
}
fn instructions() -> impl Widget {
let text = "◄ ►: select, ▲ ▼: edit, 1-6: swap, a: add, x: delete, q: quit, +/-: spacing";
Paragraph::new(text)
.fg(Self::TEXT_COLOR)
.centered()
.wrap(Wrap { trim: false })
}
fn swap_legend() -> impl Widget {
#[expect(unstable_name_collisions)]
Paragraph::new(
Line::from(
[
ConstraintName::Min,
ConstraintName::Max,
ConstraintName::Length,
ConstraintName::Percentage,
ConstraintName::Ratio,
ConstraintName::Fill,
]
.iter()
.enumerate()
.map(|(i, name)| {
format!(" {i}: {name} ", i = i + 1)
.fg(SLATE.c200)
.bg(name.color())
})
.intersperse(Span::from(" "))
.collect_vec(),
)
.centered(),
)
.wrap(Wrap { trim: false })
}
/// A bar like `<----- 80 px (gap: 2 px) ----->`
///
/// Only shows the gap when spacing is not zero
fn axis(&self, width: u16) -> impl Widget {
let label = match self.spacing.cmp(&0) {
Ordering::Greater => format!("{width} px (gap: {} px)", self.spacing),
Ordering::Less => {
format!("{width} px (overlap: {} px)", self.spacing.unsigned_abs())
}
Ordering::Equal => format!("{width} px"),
};
let bar_width = width.saturating_sub(2) as usize; // we want to `<` and `>` at the ends
let width_bar = format!("<{label:-^bar_width$}>");
Paragraph::new(width_bar).fg(Self::AXIS_COLOR).centered()
}
fn render_layout_blocks(&self, area: Rect, buf: &mut Buffer) {
let main_layout = Layout::vertical([Length(3), Fill(1)]).spacing(1);
let [user_constraints, area] = area.layout(&main_layout);
self.render_user_constraints_legend(user_constraints, buf);
let [
start,
center,
end,
space_between,
space_around,
space_evenly,
] = area.layout(&Layout::vertical([Length(7); 6]));
self.render_layout_block(Flex::Start, start, buf);
self.render_layout_block(Flex::Center, center, buf);
self.render_layout_block(Flex::End, end, buf);
self.render_layout_block(Flex::SpaceBetween, space_between, buf);
self.render_layout_block(Flex::SpaceAround, space_around, buf);
self.render_layout_block(Flex::SpaceEvenly, space_evenly, buf);
}
fn render_user_constraints_legend(&self, area: Rect, buf: &mut Buffer) {
let constraints = self.constraints.iter().map(|_| Constraint::Fill(1));
let blocks = Layout::horizontal(constraints).split(area);
for (i, (area, constraint)) in blocks.iter().zip(self.constraints.iter()).enumerate() {
let selected = self.selected_index == i;
ConstraintBlock::new(*constraint, selected, true).render(*area, buf);
}
}
fn render_layout_block(&self, flex: Flex, area: Rect, buf: &mut Buffer) {
let layout = Layout::vertical([Length(1), Max(1), Length(4)]);
let [label_area, axis_area, blocks_area] = area.layout(&layout);
if label_area.height > 0 {
format!("Flex::{flex:?}").bold().render(label_area, buf);
}
self.axis(area.width).render(axis_area, buf);
let (blocks, spacers) = Layout::horizontal(&self.constraints)
.flex(flex)
.spacing(self.spacing)
.split_with_spacers(blocks_area);
for (i, (area, constraint)) in blocks.iter().zip(self.constraints.iter()).enumerate() {
let selected = self.selected_index == i;
ConstraintBlock::new(*constraint, selected, false).render(*area, buf);
}
for area in spacers.iter() {
SpacerBlock.render(*area, buf);
}
}
}
impl Widget for ConstraintBlock {
fn render(self, area: Rect, buf: &mut Buffer) {
match area.height {
1 => self.render_1px(area, buf),
2 => self.render_2px(area, buf),
_ => self.render_4px(area, buf),
}
}
}
impl ConstraintBlock {
const TEXT_COLOR: Color = SLATE.c200;
const fn new(constraint: Constraint, selected: bool, legend: bool) -> Self {
Self {
constraint,
legend,
selected,
}
}
fn label(&self, width: u16) -> String {
let long_width = format!("{width} px");
let short_width = format!("{width}");
// border takes up 2 columns
let available_space = width.saturating_sub(2) as usize;
let width_label = if long_width.len() < available_space {
long_width
} else if short_width.len() < available_space {
short_width
} else {
String::new()
};
format!("{}\n{}", self.constraint, width_label)
}
fn render_1px(&self, area: Rect, buf: &mut Buffer) {
let lighter_color = ConstraintName::from(self.constraint).lighter_color();
let main_color = ConstraintName::from(self.constraint).color();
let selected_color = if self.selected {
lighter_color
} else {
main_color
};
Block::new()
.fg(Self::TEXT_COLOR)
.bg(selected_color)
.render(area, buf);
}
fn render_2px(&self, area: Rect, buf: &mut Buffer) {
let lighter_color = ConstraintName::from(self.constraint).lighter_color();
let main_color = ConstraintName::from(self.constraint).color();
let selected_color = if self.selected {
lighter_color
} else {
main_color
};
Block::bordered()
.border_set(symbols::border::QUADRANT_OUTSIDE)
.border_style(Style::reset().fg(selected_color).reversed())
.render(area, buf);
}
fn render_4px(&self, area: Rect, buf: &mut Buffer) {
let lighter_color = ConstraintName::from(self.constraint).lighter_color();
let main_color = ConstraintName::from(self.constraint).color();
let selected_color = if self.selected {
lighter_color
} else {
main_color
};
let color = if self.legend {
selected_color
} else {
main_color
};
let label = self.label(area.width);
let block = Block::bordered()
.border_set(symbols::border::QUADRANT_OUTSIDE)
.border_style(Style::reset().fg(color).reversed())
.fg(Self::TEXT_COLOR)
.bg(color);
Paragraph::new(label)
.centered()
.fg(Self::TEXT_COLOR)
.bg(color)
.block(block)
.render(area, buf);
if !self.legend {
let border_color = if self.selected {
lighter_color
} else {
main_color
};
if let Some(last_row) = area.rows().next_back() {
buf.set_style(last_row, border_color);
}
}
}
}
impl Widget for SpacerBlock {
fn render(self, area: Rect, buf: &mut Buffer) {
match area.height {
1 => (),
2 => Self::render_2px(area, buf),
3 => Self::render_3px(area, buf),
_ => Self::render_4px(area, buf),
}
}
}
impl SpacerBlock {
const TEXT_COLOR: Color = SLATE.c500;
const BORDER_COLOR: Color = SLATE.c600;
/// A block with a corner borders
fn block() -> impl Widget {
let corners_only = symbols::border::Set {
top_left: line::NORMAL.top_left,
top_right: line::NORMAL.top_right,
bottom_left: line::NORMAL.bottom_left,
bottom_right: line::NORMAL.bottom_right,
vertical_left: " ",
vertical_right: " ",
horizontal_top: " ",
horizontal_bottom: " ",
};
Block::bordered()
.border_set(corners_only)
.border_style(Self::BORDER_COLOR)
}
/// A vertical line used if there is not enough space to render the block
fn line() -> impl Widget {
Paragraph::new(Text::from(vec![
Line::from(""),
Line::from(""),
Line::from(""),
Line::from(""),
]))
.style(Self::BORDER_COLOR)
}
/// A label that says "Spacer" if there is enough space
fn spacer_label(width: u16) -> impl Widget {
let label = if width >= 6 { "Spacer" } else { "" };
label.fg(Self::TEXT_COLOR).into_centered_line()
}
/// A label that says "8 px" if there is enough space
fn label(width: u16) -> impl Widget {
let long_label = format!("{width} px");
let short_label = format!("{width}");
let label = if long_label.len() < width as usize {
long_label
} else if short_label.len() < width as usize {
short_label
} else {
String::new()
};
Line::styled(label, Self::TEXT_COLOR).centered()
}
fn render_2px(area: Rect, buf: &mut Buffer) {
if area.width > 1 {
Self::block().render(area, buf);
} else {
Self::line().render(area, buf);
}
}
fn render_3px(area: Rect, buf: &mut Buffer) {
if area.width > 1 {
Self::block().render(area, buf);
} else {
Self::line().render(area, buf);
}
let row = area.rows().nth(1).unwrap_or_default();
Self::spacer_label(area.width).render(row, buf);
}
fn render_4px(area: Rect, buf: &mut Buffer) {
if area.width > 1 {
Self::block().render(area, buf);
} else {
Self::line().render(area, buf);
}
let row = area.rows().nth(1).unwrap_or_default();
Self::spacer_label(area.width).render(row, buf);
let row = area.rows().nth(2).unwrap_or_default();
Self::label(area.width).render(row, buf);
}
}
impl ConstraintName {
const fn color(self) -> Color {
match self {
Self::Length => SLATE.c700,
Self::Percentage => SLATE.c800,
Self::Ratio => SLATE.c900,
Self::Fill => SLATE.c950,
Self::Min => BLUE.c800,
Self::Max => BLUE.c900,
}
}
const fn lighter_color(self) -> Color {
match self {
Self::Length => STONE.c500,
Self::Percentage => STONE.c600,
Self::Ratio => STONE.c700,
Self::Fill => STONE.c800,
Self::Min => SKY.c600,
Self::Max => SKY.c700,
}
}
}

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@@ -1,15 +0,0 @@
[package]
name = "constraints"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
ratatui.workspace = true
strum.workspace = true
[lints]
workspace = true

View File

@@ -1,9 +0,0 @@
# Constraints demo
This example shows different types of constraints.
To run this demo:
```shell
cargo run -p constraints
```

View File

@@ -1,388 +0,0 @@
/// A Ratatui example that demonstrates different types of constraints.
///
/// This example runs with the Ratatui library code in the branch that you are currently
/// reading. See the [`latest`] branch for the code which works with the most recent Ratatui
/// release.
///
/// [`latest`]: https://github.com/ratatui/ratatui/tree/latest
use color_eyre::Result;
use crossterm::event::{self, KeyCode};
use ratatui::buffer::Buffer;
use ratatui::layout::Constraint::{self, Fill, Length, Max, Min, Percentage, Ratio};
use ratatui::layout::{Layout, Rect};
use ratatui::style::palette::tailwind;
use ratatui::style::{Color, Modifier, Style, Stylize};
use ratatui::text::Line;
use ratatui::widgets::{
Block, Padding, Paragraph, Scrollbar, ScrollbarOrientation, ScrollbarState, StatefulWidget,
Tabs, Widget,
};
use ratatui::{DefaultTerminal, symbols};
use strum::{Display, EnumIter, FromRepr, IntoEnumIterator};
const SPACER_HEIGHT: u16 = 0;
const ILLUSTRATION_HEIGHT: u16 = 4;
const EXAMPLE_HEIGHT: u16 = ILLUSTRATION_HEIGHT + SPACER_HEIGHT;
// priority 2
const MIN_COLOR: Color = tailwind::BLUE.c900;
const MAX_COLOR: Color = tailwind::BLUE.c800;
// priority 3
const LENGTH_COLOR: Color = tailwind::SLATE.c700;
const PERCENTAGE_COLOR: Color = tailwind::SLATE.c800;
const RATIO_COLOR: Color = tailwind::SLATE.c900;
// priority 4
const FILL_COLOR: Color = tailwind::SLATE.c950;
fn main() -> Result<()> {
color_eyre::install()?;
ratatui::run(|terminal| App::default().run(terminal))
}
#[derive(Default, Clone, Copy)]
struct App {
selected_tab: SelectedTab,
scroll_offset: u16,
max_scroll_offset: u16,
state: AppState,
}
/// Tabs for the different examples
///
/// The order of the variants is the order in which they are displayed.
#[derive(Default, Debug, Copy, Clone, Display, FromRepr, EnumIter, PartialEq, Eq)]
enum SelectedTab {
#[default]
Min,
Max,
Length,
Percentage,
Ratio,
Fill,
}
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
enum AppState {
#[default]
Running,
Quit,
}
impl App {
fn run(mut self, terminal: &mut DefaultTerminal) -> Result<()> {
self.update_max_scroll_offset();
while self.is_running() {
terminal.draw(|frame| frame.render_widget(self, frame.area()))?;
self.handle_events()?;
}
Ok(())
}
const fn update_max_scroll_offset(&mut self) {
self.max_scroll_offset = (self.selected_tab.get_example_count() - 1) * EXAMPLE_HEIGHT;
}
fn is_running(self) -> bool {
self.state == AppState::Running
}
fn handle_events(&mut self) -> Result<()> {
if let Some(key) = event::read()?.as_key_press_event() {
match key.code {
KeyCode::Char('q') | KeyCode::Esc => self.quit(),
KeyCode::Char('l') | KeyCode::Right => self.next(),
KeyCode::Char('h') | KeyCode::Left => self.previous(),
KeyCode::Char('j') | KeyCode::Down => self.down(),
KeyCode::Char('k') | KeyCode::Up => self.up(),
KeyCode::Char('g') | KeyCode::Home => self.top(),
KeyCode::Char('G') | KeyCode::End => self.bottom(),
_ => (),
}
}
Ok(())
}
const fn quit(&mut self) {
self.state = AppState::Quit;
}
fn next(&mut self) {
self.selected_tab = self.selected_tab.next();
self.update_max_scroll_offset();
self.scroll_offset = 0;
}
fn previous(&mut self) {
self.selected_tab = self.selected_tab.previous();
self.update_max_scroll_offset();
self.scroll_offset = 0;
}
const fn up(&mut self) {
self.scroll_offset = self.scroll_offset.saturating_sub(1);
}
fn down(&mut self) {
self.scroll_offset = self
.scroll_offset
.saturating_add(1)
.min(self.max_scroll_offset);
}
const fn top(&mut self) {
self.scroll_offset = 0;
}
const fn bottom(&mut self) {
self.scroll_offset = self.max_scroll_offset;
}
}
impl Widget for App {
fn render(self, area: Rect, buf: &mut Buffer) {
let [tabs, axis, demo] = area.layout(&Layout::vertical([Length(3), Length(3), Fill(0)]));
self.render_tabs(tabs, buf);
Self::render_axis(axis, buf);
self.render_demo(demo, buf);
}
}
impl App {
fn render_tabs(self, area: Rect, buf: &mut Buffer) {
let titles = SelectedTab::iter().map(SelectedTab::to_tab_title);
let block = Block::new()
.title("Constraints ".bold())
.title(" Use h l or ◄ ► to change tab and j k or ▲ ▼ to scroll");
Tabs::new(titles)
.block(block)
.highlight_style(Modifier::REVERSED)
.select(self.selected_tab as usize)
.padding("", "")
.divider(" ")
.render(area, buf);
}
fn render_axis(area: Rect, buf: &mut Buffer) {
let width = area.width as usize;
// a bar like `<----- 80 px ----->`
let width_label = format!("{width} px");
let width_bar = format!(
"<{width_label:-^width$}>",
width = width - width_label.len() / 2
);
Paragraph::new(width_bar.dark_gray())
.centered()
.block(Block::new().padding(Padding {
left: 0,
right: 0,
top: 1,
bottom: 0,
}))
.render(area, buf);
}
/// Render the demo content
///
/// This function renders the demo content into a separate buffer and then splices the buffer
/// into the main buffer. This is done to make it possible to handle scrolling easily.
#[expect(clippy::cast_possible_truncation)]
fn render_demo(self, area: Rect, buf: &mut Buffer) {
// render demo content into a separate buffer so all examples fit we add an extra
// area.height to make sure the last example is fully visible even when the scroll offset is
// at the max
let height = self.selected_tab.get_example_count() * EXAMPLE_HEIGHT;
let demo_area = Rect::new(0, 0, area.width, height + area.height);
let mut demo_buf = Buffer::empty(demo_area);
let scrollbar_needed = self.scroll_offset != 0 || height > area.height;
let content_area = if scrollbar_needed {
Rect {
width: demo_area.width - 1,
..demo_area
}
} else {
demo_area
};
self.selected_tab.render(content_area, &mut demo_buf);
let visible_content = demo_buf
.content
.into_iter()
.skip((demo_area.width * self.scroll_offset) as usize)
.take(area.area() as usize);
for (i, cell) in visible_content.enumerate() {
let x = i as u16 % area.width;
let y = i as u16 / area.width;
buf[(area.x + x, area.y + y)] = cell;
}
if scrollbar_needed {
let mut state = ScrollbarState::new(self.max_scroll_offset as usize)
.position(self.scroll_offset as usize);
Scrollbar::new(ScrollbarOrientation::VerticalRight).render(area, buf, &mut state);
}
}
}
impl SelectedTab {
/// Get the previous tab, if there is no previous tab return the current tab.
fn previous(self) -> Self {
let current_index: usize = self as usize;
let previous_index = current_index.saturating_sub(1);
Self::from_repr(previous_index).unwrap_or(self)
}
/// Get the next tab, if there is no next tab return the current tab.
fn next(self) -> Self {
let current_index = self as usize;
let next_index = current_index.saturating_add(1);
Self::from_repr(next_index).unwrap_or(self)
}
const fn get_example_count(self) -> u16 {
#[expect(clippy::match_same_arms)]
match self {
Self::Length => 4,
Self::Percentage => 5,
Self::Ratio => 4,
Self::Fill => 2,
Self::Min => 5,
Self::Max => 5,
}
}
fn to_tab_title(value: Self) -> Line<'static> {
let text = format!(" {value} ");
let color = match value {
Self::Length => LENGTH_COLOR,
Self::Percentage => PERCENTAGE_COLOR,
Self::Ratio => RATIO_COLOR,
Self::Fill => FILL_COLOR,
Self::Min => MIN_COLOR,
Self::Max => MAX_COLOR,
};
text.fg(tailwind::SLATE.c200).bg(color).into()
}
}
impl Widget for SelectedTab {
fn render(self, area: Rect, buf: &mut Buffer) {
match self {
Self::Length => Self::render_length_example(area, buf),
Self::Percentage => Self::render_percentage_example(area, buf),
Self::Ratio => Self::render_ratio_example(area, buf),
Self::Fill => Self::render_fill_example(area, buf),
Self::Min => Self::render_min_example(area, buf),
Self::Max => Self::render_max_example(area, buf),
}
}
}
impl SelectedTab {
fn render_length_example(area: Rect, buf: &mut Buffer) {
let layout = Layout::vertical([Length(EXAMPLE_HEIGHT); 4]);
let [example1, example2, example3, _] = area.layout(&layout);
Example::new(&[Length(20), Length(20)]).render(example1, buf);
Example::new(&[Length(20), Min(20)]).render(example2, buf);
Example::new(&[Length(20), Max(20)]).render(example3, buf);
}
fn render_percentage_example(area: Rect, buf: &mut Buffer) {
let layout = Layout::vertical([Length(EXAMPLE_HEIGHT); 6]);
let [example1, example2, example3, example4, example5, _] = area.layout(&layout);
Example::new(&[Percentage(75), Fill(0)]).render(example1, buf);
Example::new(&[Percentage(25), Fill(0)]).render(example2, buf);
Example::new(&[Percentage(50), Min(20)]).render(example3, buf);
Example::new(&[Percentage(0), Max(0)]).render(example4, buf);
Example::new(&[Percentage(0), Fill(0)]).render(example5, buf);
}
fn render_ratio_example(area: Rect, buf: &mut Buffer) {
let layout = Layout::vertical([Length(EXAMPLE_HEIGHT); 5]);
let [example1, example2, example3, example4, _] = area.layout(&layout);
Example::new(&[Ratio(1, 2); 2]).render(example1, buf);
Example::new(&[Ratio(1, 4); 4]).render(example2, buf);
Example::new(&[Ratio(1, 2), Ratio(1, 3), Ratio(1, 4)]).render(example3, buf);
Example::new(&[Ratio(1, 2), Percentage(25), Length(10)]).render(example4, buf);
}
fn render_fill_example(area: Rect, buf: &mut Buffer) {
let [example1, example2, _] = area.layout(&Layout::vertical([Length(EXAMPLE_HEIGHT); 3]));
Example::new(&[Fill(1), Fill(2), Fill(3)]).render(example1, buf);
Example::new(&[Fill(1), Percentage(50), Fill(1)]).render(example2, buf);
}
fn render_min_example(area: Rect, buf: &mut Buffer) {
let layout = Layout::vertical([Length(EXAMPLE_HEIGHT); 6]);
let [example1, example2, example3, example4, example5, _] = area.layout(&layout);
Example::new(&[Percentage(100), Min(0)]).render(example1, buf);
Example::new(&[Percentage(100), Min(20)]).render(example2, buf);
Example::new(&[Percentage(100), Min(40)]).render(example3, buf);
Example::new(&[Percentage(100), Min(60)]).render(example4, buf);
Example::new(&[Percentage(100), Min(80)]).render(example5, buf);
}
fn render_max_example(area: Rect, buf: &mut Buffer) {
let layout = Layout::vertical([Length(EXAMPLE_HEIGHT); 6]);
let [example1, example2, example3, example4, example5, _] = area.layout(&layout);
Example::new(&[Percentage(0), Max(0)]).render(example1, buf);
Example::new(&[Percentage(0), Max(20)]).render(example2, buf);
Example::new(&[Percentage(0), Max(40)]).render(example3, buf);
Example::new(&[Percentage(0), Max(60)]).render(example4, buf);
Example::new(&[Percentage(0), Max(80)]).render(example5, buf);
}
}
struct Example {
constraints: Vec<Constraint>,
}
impl Example {
fn new(constraints: &[Constraint]) -> Self {
Self {
constraints: constraints.into(),
}
}
}
impl Widget for Example {
fn render(self, area: Rect, buf: &mut Buffer) {
let vertical = Layout::vertical([Length(ILLUSTRATION_HEIGHT), Length(SPACER_HEIGHT)]);
let horizontal = Layout::horizontal(&self.constraints);
let [area, _] = area.layout(&vertical);
let blocks = area.layout_vec(&horizontal);
for (block, constraint) in blocks.iter().zip(&self.constraints) {
Self::illustration(*constraint, block.width).render(*block, buf);
}
}
}
impl Example {
fn illustration(constraint: Constraint, width: u16) -> impl Widget {
let color = match constraint {
Constraint::Length(_) => LENGTH_COLOR,
Constraint::Percentage(_) => PERCENTAGE_COLOR,
Constraint::Ratio(_, _) => RATIO_COLOR,
Constraint::Fill(_) => FILL_COLOR,
Constraint::Min(_) => MIN_COLOR,
Constraint::Max(_) => MAX_COLOR,
};
let fg = Color::White;
let title = format!("{constraint}");
let content = format!("{width} px");
let text = format!("{title}\n{content}");
let block = Block::bordered()
.border_set(symbols::border::QUADRANT_OUTSIDE)
.border_style(Style::reset().fg(color).reversed())
.style(Style::default().fg(fg).bg(color));
Paragraph::new(text).centered().block(block)
}
}

View File

@@ -1,14 +0,0 @@
[package]
name = "custom-widget"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
ratatui.workspace = true
[lints]
workspace = true

View File

@@ -1,9 +0,0 @@
# Custom widget demo
This example shows how to create a custom widget that can be interacted with the mouse.
To run this demo:
```shell
cargo run -p custom-widget
```

View File

@@ -1,258 +0,0 @@
/// A Ratatui example that demonstrates how to create a custom widget that can be interacted
/// with using the mouse.
///
/// This example runs with the Ratatui library code in the branch that you are currently
/// reading. See the [`latest`] branch for the code which works with the most recent Ratatui
/// release.
///
/// [`latest`]: https://github.com/ratatui/ratatui/tree/latest
use std::{io::stdout, ops::ControlFlow, time::Duration};
use color_eyre::Result;
use crossterm::event::{
self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode, KeyEvent, MouseButton,
MouseEvent, MouseEventKind,
};
use crossterm::execute;
use ratatui::buffer::Buffer;
use ratatui::layout::{Constraint, Flex, Layout, Rect};
use ratatui::style::{Color, Style};
use ratatui::text::Line;
use ratatui::widgets::{Paragraph, Widget};
use ratatui::{DefaultTerminal, Frame};
fn main() -> Result<()> {
color_eyre::install()?;
let terminal = ratatui::init();
execute!(stdout(), EnableMouseCapture)?;
let app_result = run(terminal);
ratatui::restore();
if let Err(err) = execute!(stdout(), DisableMouseCapture) {
eprintln!("Error disabling mouse capture: {err}");
}
app_result
}
/// A custom widget that renders a button with a label, theme and state.
#[derive(Debug, Clone)]
struct Button<'a> {
label: Line<'a>,
theme: Theme,
state: State,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
enum State {
Normal,
Selected,
Active,
}
#[derive(Debug, Clone, Copy)]
struct Theme {
text: Color,
background: Color,
highlight: Color,
shadow: Color,
}
const BLUE: Theme = Theme {
text: Color::Rgb(16, 24, 48),
background: Color::Rgb(48, 72, 144),
highlight: Color::Rgb(64, 96, 192),
shadow: Color::Rgb(32, 48, 96),
};
const RED: Theme = Theme {
text: Color::Rgb(48, 16, 16),
background: Color::Rgb(144, 48, 48),
highlight: Color::Rgb(192, 64, 64),
shadow: Color::Rgb(96, 32, 32),
};
const GREEN: Theme = Theme {
text: Color::Rgb(16, 48, 16),
background: Color::Rgb(48, 144, 48),
highlight: Color::Rgb(64, 192, 64),
shadow: Color::Rgb(32, 96, 32),
};
/// A button with a label that can be themed.
impl<'a> Button<'a> {
pub fn new<T: Into<Line<'a>>>(label: T) -> Self {
Button {
label: label.into(),
theme: BLUE,
state: State::Normal,
}
}
pub const fn theme(mut self, theme: Theme) -> Self {
self.theme = theme;
self
}
pub const fn state(mut self, state: State) -> Self {
self.state = state;
self
}
}
impl Widget for Button<'_> {
#[expect(clippy::cast_possible_truncation)]
fn render(self, area: Rect, buf: &mut Buffer) {
let (background, text, shadow, highlight) = self.colors();
buf.set_style(area, Style::new().bg(background).fg(text));
// render top line if there's enough space
if area.height > 2 {
buf.set_string(
area.x,
area.y,
"".repeat(area.width as usize),
Style::new().fg(highlight).bg(background),
);
}
// render bottom line if there's enough space
if area.height > 1 {
buf.set_string(
area.x,
area.y + area.height - 1,
"".repeat(area.width as usize),
Style::new().fg(shadow).bg(background),
);
}
// render label centered
buf.set_line(
area.x + (area.width.saturating_sub(self.label.width() as u16)) / 2,
area.y + (area.height.saturating_sub(1)) / 2,
&self.label,
area.width,
);
}
}
impl Button<'_> {
const fn colors(&self) -> (Color, Color, Color, Color) {
let theme = self.theme;
match self.state {
State::Normal => (theme.background, theme.text, theme.shadow, theme.highlight),
State::Selected => (theme.highlight, theme.text, theme.shadow, theme.highlight),
State::Active => (theme.background, theme.text, theme.highlight, theme.shadow),
}
}
}
fn run(mut terminal: DefaultTerminal) -> Result<()> {
let mut selected_button: usize = 0;
let mut button_states = [State::Selected, State::Normal, State::Normal];
loop {
terminal.draw(|frame| render(frame, button_states))?;
if !event::poll(Duration::from_millis(100))? {
continue;
}
match event::read()? {
Event::Key(key) => {
if handle_key_event(key, &mut button_states, &mut selected_button).is_break() {
break;
}
}
Event::Mouse(mouse) => {
handle_mouse_event(mouse, &mut button_states, &mut selected_button);
}
_ => (),
}
}
Ok(())
}
fn render(frame: &mut Frame, states: [State; 3]) {
let layout = Layout::vertical([
Constraint::Length(1),
Constraint::Max(3),
Constraint::Length(1),
Constraint::Min(0), // ignore remaining space
]);
let [title, buttons, help, _] = frame.area().layout(&layout);
frame.render_widget(
Paragraph::new("Custom Widget Example (mouse enabled)"),
title,
);
render_buttons(frame, buttons, states);
frame.render_widget(Paragraph::new("←/→: select, Space: toggle, q: quit"), help);
}
fn render_buttons(frame: &mut Frame<'_>, area: Rect, states: [State; 3]) {
let layout = Layout::horizontal([Constraint::Length(15); 3]).flex(Flex::Start);
let [red, green, blue] = area.layout(&layout);
frame.render_widget(Button::new("Red").theme(RED).state(states[0]), red);
frame.render_widget(Button::new("Green").theme(GREEN).state(states[1]), green);
frame.render_widget(Button::new("Blue").theme(BLUE).state(states[2]), blue);
}
fn handle_key_event(
key: KeyEvent,
button_states: &mut [State; 3],
selected_button: &mut usize,
) -> ControlFlow<()> {
if !key.is_press() {
return ControlFlow::Continue(());
}
match key.code {
KeyCode::Char('q') => return ControlFlow::Break(()),
KeyCode::Left | KeyCode::Char('h') => {
button_states[*selected_button] = State::Normal;
*selected_button = selected_button.saturating_sub(1);
button_states[*selected_button] = State::Selected;
}
KeyCode::Right | KeyCode::Char('l') => {
button_states[*selected_button] = State::Normal;
*selected_button = selected_button.saturating_add(1).min(2);
button_states[*selected_button] = State::Selected;
}
KeyCode::Char(' ') => {
if button_states[*selected_button] == State::Active {
button_states[*selected_button] = State::Normal;
} else {
button_states[*selected_button] = State::Active;
}
}
_ => (),
}
ControlFlow::Continue(())
}
fn handle_mouse_event(
mouse: MouseEvent,
button_states: &mut [State; 3],
selected_button: &mut usize,
) {
match mouse.kind {
MouseEventKind::Moved => {
let old_selected_button = *selected_button;
*selected_button = match mouse.column {
x if x < 15 => 0,
x if x < 30 => 1,
_ => 2,
};
if old_selected_button != *selected_button {
if button_states[old_selected_button] != State::Active {
button_states[old_selected_button] = State::Normal;
}
if button_states[*selected_button] != State::Active {
button_states[*selected_button] = State::Selected;
}
}
}
MouseEventKind::Down(MouseButton::Left) => {
if button_states[*selected_button] == State::Active {
button_states[*selected_button] = State::Normal;
} else {
button_states[*selected_button] = State::Active;
}
}
_ => (),
}
}

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@@ -1,22 +0,0 @@
[package]
name = "demo"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[features]
default = ["crossterm"]
crossterm = ["ratatui/crossterm", "dep:crossterm"]
termion = ["ratatui/termion", "dep:termion"]
termwiz = ["ratatui/termwiz", "dep:termwiz"]
[dependencies]
clap.workspace = true
crossterm = { workspace = true, optional = true }
rand.workspace = true
ratatui.workspace = true
termwiz = { workspace = true, optional = true }
[target.'cfg(not(windows))'.dependencies]
termion = { workspace = true, optional = true }

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@@ -1,25 +0,0 @@
# Demo example
This is the original demo that was developed for Tui-rs (the library that Ratatui was forked from).
![demo.gif](https://github.com/ratatui/ratatui/blob/images/examples/demo.gif?raw=true)
This example is available for each backend. To run it:
## crossterm
```shell
cargo run -p demo
```
## termion
```shell
cargo run -p demo --no-default-features --features termion
```
## termwiz
```shell
cargo run -p demo --no-default-features --features termwiz
```

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@@ -1,76 +0,0 @@
use std::error::Error;
use std::io;
use std::time::{Duration, Instant};
use crossterm::event::{self, DisableMouseCapture, EnableMouseCapture, KeyCode};
use crossterm::execute;
use crossterm::terminal::{
EnterAlternateScreen, LeaveAlternateScreen, disable_raw_mode, enable_raw_mode,
};
use ratatui::Terminal;
use ratatui::backend::{Backend, CrosstermBackend};
use crate::app::App;
use crate::ui;
pub fn run(tick_rate: Duration, enhanced_graphics: bool) -> Result<(), Box<dyn Error>> {
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
// create app and run it
let app = App::new("Crossterm Demo", enhanced_graphics);
let app_result = run_app(&mut terminal, app, tick_rate);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
if let Err(err) = app_result {
println!("{err:?}");
}
Ok(())
}
fn run_app<B: Backend>(
terminal: &mut Terminal<B>,
mut app: App,
tick_rate: Duration,
) -> Result<(), Box<dyn Error>>
where
B::Error: 'static,
{
let mut last_tick = Instant::now();
loop {
terminal.draw(|frame| ui::render(frame, &mut app))?;
let timeout = tick_rate.saturating_sub(last_tick.elapsed());
if !event::poll(timeout)? {
app.on_tick();
last_tick = Instant::now();
continue;
}
if let Some(key) = event::read()?.as_key_press_event() {
match key.code {
KeyCode::Char('h') | KeyCode::Left => app.on_left(),
KeyCode::Char('j') | KeyCode::Down => app.on_down(),
KeyCode::Char('k') | KeyCode::Up => app.on_up(),
KeyCode::Char('l') | KeyCode::Right => app.on_right(),
KeyCode::Char(c) => app.on_key(c),
_ => {}
}
}
if app.should_quit {
return Ok(());
}
}
}

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@@ -1,57 +0,0 @@
//! # [Ratatui] Original Demo example
//!
//! The latest version of this example is available in the [examples] folder in the repository.
//!
//! Please note that the examples are designed to be run against the `main` branch of the Github
//! repository. This means that you may not be able to compile with the latest release version on
//! crates.io, or the one that you have installed locally.
//!
//! See the [examples readme] for more information on finding examples that match the version of the
//! library you are using.
//!
//! [Ratatui]: https://github.com/ratatui/ratatui
//! [examples]: https://github.com/ratatui/ratatui/blob/main/examples
//! [examples readme]: https://github.com/ratatui/ratatui/blob/main/examples/README.md
use std::error::Error;
use std::time::Duration;
use clap::Parser;
mod app;
#[cfg(feature = "crossterm")]
mod crossterm;
#[cfg(all(not(windows), feature = "termion"))]
mod termion;
#[cfg(feature = "termwiz")]
mod termwiz;
mod ui;
/// Demo
#[derive(Debug, Parser)]
struct Cli {
/// time in ms between two ticks.
#[arg(short, long, default_value_t = 250)]
tick_rate: u64,
/// whether unicode symbols are used to improve the overall look of the app
#[arg(short, long, default_value_t = true)]
unicode: bool,
}
fn main() -> Result<(), Box<dyn Error>> {
let cli = Cli::parse();
let tick_rate = Duration::from_millis(cli.tick_rate);
#[cfg(feature = "crossterm")]
crate::crossterm::run(tick_rate, cli.unicode)?;
#[cfg(all(not(windows), feature = "termion", not(feature = "crossterm")))]
crate::termion::run(tick_rate, cli.unicode)?;
#[cfg(all(
feature = "termwiz",
not(feature = "crossterm"),
not(feature = "termion")
))]
crate::termwiz::run(tick_rate, cli.unicode)?;
Ok(())
}

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@@ -1,19 +0,0 @@
[package]
name = "demo2"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
indoc.workspace = true
itertools.workspace = true
palette.workspace = true
rand.workspace = true
rand_chacha.workspace = true
ratatui = { workspace = true, features = ["all-widgets"] }
strum.workspace = true
time.workspace = true
unicode-width.workspace = true

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@@ -1,9 +0,0 @@
## Demo2
This is the demo example from the main README and crate page. Source: [demo2](./demo2/).
```shell
cargo run -p demo2
```
![Demo2](https://github.com/ratatui/ratatui/blob/images/examples/demo2.gif?raw=true)

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@@ -1,215 +0,0 @@
use std::time::Duration;
use color_eyre::Result;
use color_eyre::eyre::Context;
use crossterm::event::{self, KeyCode};
use itertools::Itertools;
use ratatui::buffer::Buffer;
use ratatui::layout::{Constraint, Layout, Rect};
use ratatui::style::Color;
use ratatui::text::{Line, Span};
use ratatui::widgets::{Block, Tabs, Widget};
use ratatui::{DefaultTerminal, Frame};
use strum::{Display, EnumIter, FromRepr, IntoEnumIterator};
use crate::tabs::{AboutTab, EmailTab, RecipeTab, TracerouteTab, WeatherTab};
use crate::{THEME, destroy};
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
pub struct App {
mode: Mode,
tab: Tab,
about_tab: AboutTab,
recipe_tab: RecipeTab,
email_tab: EmailTab,
traceroute_tab: TracerouteTab,
weather_tab: WeatherTab,
}
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
enum Mode {
#[default]
Running,
Destroy,
Quit,
}
#[derive(Debug, Clone, Copy, Default, Display, EnumIter, FromRepr, PartialEq, Eq)]
enum Tab {
#[default]
About,
Recipe,
Email,
Traceroute,
Weather,
}
impl App {
/// Run the app until the user quits.
pub fn run(mut self, mut terminal: DefaultTerminal) -> Result<()> {
while self.is_running() {
terminal
.draw(|frame| self.render(frame))
.wrap_err("terminal.draw")?;
self.handle_events()?;
}
Ok(())
}
fn is_running(&self) -> bool {
self.mode != Mode::Quit
}
/// Render a single frame of the app.
fn render(&self, frame: &mut Frame) {
frame.render_widget(self, frame.area());
if self.mode == Mode::Destroy {
destroy::destroy(frame);
}
}
/// Handle events from the terminal.
///
/// This function is called once per frame, The events are polled from the stdin with timeout of
/// 1/50th of a second. This was chosen to try to match the default frame rate of a GIF in VHS.
fn handle_events(&mut self) -> Result<()> {
let timeout = Duration::from_secs_f64(1.0 / 50.0);
if !event::poll(timeout)? {
return Ok(());
}
if let Some(key) = event::read()?.as_key_press_event() {
match key.code {
KeyCode::Char('q') | KeyCode::Esc => self.mode = Mode::Quit,
KeyCode::Char('h') | KeyCode::Left => self.prev_tab(),
KeyCode::Char('l') | KeyCode::Right | KeyCode::Tab => self.next_tab(),
KeyCode::Char('k') | KeyCode::Up => self.prev(),
KeyCode::Char('j') | KeyCode::Down => self.next(),
KeyCode::Char('d') | KeyCode::Delete => self.destroy(),
_ => {}
};
}
Ok(())
}
fn prev(&mut self) {
match self.tab {
Tab::About => self.about_tab.prev_row(),
Tab::Recipe => self.recipe_tab.prev(),
Tab::Email => self.email_tab.prev(),
Tab::Traceroute => self.traceroute_tab.prev_row(),
Tab::Weather => self.weather_tab.prev(),
}
}
fn next(&mut self) {
match self.tab {
Tab::About => self.about_tab.next_row(),
Tab::Recipe => self.recipe_tab.next(),
Tab::Email => self.email_tab.next(),
Tab::Traceroute => self.traceroute_tab.next_row(),
Tab::Weather => self.weather_tab.next(),
}
}
fn prev_tab(&mut self) {
self.tab = self.tab.prev();
}
fn next_tab(&mut self) {
self.tab = self.tab.next();
}
fn destroy(&mut self) {
self.mode = Mode::Destroy;
}
}
/// Implement Widget for &App rather than for App as we would otherwise have to clone or copy the
/// entire app state on every frame. For this example, the app state is small enough that it doesn't
/// matter, but for larger apps this can be a significant performance improvement.
impl Widget for &App {
fn render(self, area: Rect, buf: &mut Buffer) {
let layout = Layout::vertical([
Constraint::Length(1),
Constraint::Min(0),
Constraint::Length(1),
]);
let [title_bar, tab, bottom_bar] = area.layout(&layout);
Block::new().style(THEME.root).render(area, buf);
self.render_title_bar(title_bar, buf);
self.render_selected_tab(tab, buf);
App::render_bottom_bar(bottom_bar, buf);
}
}
impl App {
fn render_title_bar(&self, area: Rect, buf: &mut Buffer) {
let layout = Layout::horizontal([Constraint::Min(0), Constraint::Length(43)]);
let [title, tabs] = area.layout(&layout);
Span::styled("Ratatui", THEME.app_title).render(title, buf);
let titles = Tab::iter().map(Tab::title);
Tabs::new(titles)
.style(THEME.tabs)
.highlight_style(THEME.tabs_selected)
.select(self.tab as usize)
.divider("")
.padding("", "")
.render(tabs, buf);
}
fn render_selected_tab(&self, area: Rect, buf: &mut Buffer) {
match self.tab {
Tab::About => self.about_tab.render(area, buf),
Tab::Recipe => self.recipe_tab.render(area, buf),
Tab::Email => self.email_tab.render(area, buf),
Tab::Traceroute => self.traceroute_tab.render(area, buf),
Tab::Weather => self.weather_tab.render(area, buf),
};
}
fn render_bottom_bar(area: Rect, buf: &mut Buffer) {
let keys = [
("H/←", "Left"),
("L/→", "Right"),
("K/↑", "Up"),
("J/↓", "Down"),
("D/Del", "Destroy"),
("Q/Esc", "Quit"),
];
let spans = keys
.iter()
.flat_map(|(key, desc)| {
let key = Span::styled(format!(" {key} "), THEME.key_binding.key);
let desc = Span::styled(format!(" {desc} "), THEME.key_binding.description);
[key, desc]
})
.collect_vec();
Line::from(spans)
.centered()
.style((Color::Indexed(236), Color::Indexed(232)))
.render(area, buf);
}
}
impl Tab {
fn next(self) -> Self {
let current_index = self as usize;
let next_index = current_index.saturating_add(1);
Self::from_repr(next_index).unwrap_or(self)
}
fn prev(self) -> Self {
let current_index = self as usize;
let prev_index = current_index.saturating_sub(1);
Self::from_repr(prev_index).unwrap_or(self)
}
fn title(self) -> String {
match self {
Self::About => String::new(),
tab => format!(" {tab} "),
}
}
}

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@@ -1,38 +0,0 @@
use palette::{IntoColor, Okhsv, Srgb};
use ratatui::buffer::Buffer;
use ratatui::layout::Rect;
use ratatui::style::Color;
use ratatui::widgets::Widget;
/// A widget that renders a color swatch of RGB colors.
///
/// The widget is rendered as a rectangle with the hue changing along the x-axis from 0.0 to 360.0
/// and the value changing along the y-axis (from 1.0 to 0.0). Each pixel is rendered as a block
/// character with the top half slightly lighter than the bottom half.
pub struct RgbSwatch;
impl Widget for RgbSwatch {
#[expect(clippy::cast_precision_loss, clippy::similar_names)]
fn render(self, area: Rect, buf: &mut Buffer) {
for (yi, y) in (area.top()..area.bottom()).enumerate() {
let value = f32::from(area.height) - yi as f32;
let value_fg = value / f32::from(area.height);
let value_bg = (value - 0.5) / f32::from(area.height);
for (xi, x) in (area.left()..area.right()).enumerate() {
let hue = xi as f32 * 360.0 / f32::from(area.width);
let fg = color_from_oklab(hue, Okhsv::max_saturation(), value_fg);
let bg = color_from_oklab(hue, Okhsv::max_saturation(), value_bg);
buf[(x, y)].set_char('▀').set_fg(fg).set_bg(bg);
}
}
}
}
/// Convert a hue and value into an RGB color via the Oklab color space.
///
/// See <https://bottosson.github.io/posts/oklab/> for more details.
pub fn color_from_oklab(hue: f32, saturation: f32, value: f32) -> Color {
let color: Srgb = Okhsv::new(hue, saturation, value).into_color();
let color = color.into_format();
Color::Rgb(color.red, color.green, color.blue)
}

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@@ -1,140 +0,0 @@
use rand::Rng;
use rand_chacha::rand_core::SeedableRng;
use ratatui::Frame;
use ratatui::buffer::Buffer;
use ratatui::layout::{Flex, Layout, Rect};
use ratatui::style::{Color, Style};
use ratatui::text::Text;
use ratatui::widgets::Widget;
/// delay the start of the animation so it doesn't start immediately
const DELAY: usize = 120;
/// higher means more pixels per frame are modified in the animation
const DRIP_SPEED: usize = 500;
/// delay the start of the text animation so it doesn't start immediately after the initial delay
const TEXT_DELAY: usize = 180;
/// Destroy mode activated by pressing `d`
pub fn destroy(frame: &mut Frame<'_>) {
let frame_count = frame.count().saturating_sub(DELAY);
if frame_count == 0 {
return;
}
let area = frame.area();
let buf = frame.buffer_mut();
drip(frame_count, area, buf);
text(frame_count, area, buf);
}
/// Move a bunch of random pixels down one row.
///
/// Each pick some random pixels and move them each down one row. This is a very inefficient way to
/// do this, but it works well enough for this demo.
#[expect(
clippy::cast_possible_truncation,
clippy::cast_precision_loss,
clippy::cast_sign_loss
)]
fn drip(frame_count: usize, area: Rect, buf: &mut Buffer) {
// a seeded rng as we have to move the same random pixels each frame
let mut rng = rand_chacha::ChaCha8Rng::seed_from_u64(10);
let ramp_frames = 450;
let fractional_speed = frame_count as f64 / f64::from(ramp_frames);
let variable_speed = DRIP_SPEED as f64 * fractional_speed * fractional_speed * fractional_speed;
let pixel_count = (frame_count as f64 * variable_speed).floor() as usize;
for _ in 0..pixel_count {
let src_x = rng.random_range(0..area.width);
let src_y = rng.random_range(1..area.height - 2);
let src = buf[(src_x, src_y)].clone();
// 1% of the time, move a blank or pixel (10:1) to the top line of the screen
if rng.random_ratio(1, 100) {
let dest_x = rng
.random_range(src_x.saturating_sub(5)..src_x.saturating_add(5))
.clamp(area.left(), area.right() - 1);
let dest_y = area.top() + 1;
let dest = &mut buf[(dest_x, dest_y)];
// copy the cell to the new location about 1/10 of the time blank out the cell the rest
// of the time. This has the effect of gradually removing the pixels from the screen.
if rng.random_ratio(1, 10) {
*dest = src;
} else {
dest.reset();
}
} else {
// move the pixel down one row
let dest_x = src_x;
let dest_y = src_y.saturating_add(1).min(area.bottom() - 2);
// copy the cell to the new location
buf[(dest_x, dest_y)] = src;
}
}
}
/// draw some text fading in and out from black to red and back
#[expect(clippy::cast_possible_truncation, clippy::cast_precision_loss)]
fn text(frame_count: usize, area: Rect, buf: &mut Buffer) {
let sub_frame = frame_count.saturating_sub(TEXT_DELAY);
if sub_frame == 0 {
return;
}
let logo = indoc::indoc! {"
██████ ████ ██████ ████ ██████ ██ ██ ██
██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
██████ ████████ ██ ████████ ██ ██ ██ ██
██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
██ ██ ██ ██ ██ ██ ██ ██ ████ ██
"};
let logo_text = Text::styled(logo, Color::Rgb(255, 255, 255));
let area = centered_rect(area, logo_text.width() as u16, logo_text.height() as u16);
let mask_buf = &mut Buffer::empty(area);
logo_text.render(area, mask_buf);
let percentage = (sub_frame as f64 / 480.0).clamp(0.0, 1.0);
for row in area.rows() {
for col in row.columns() {
let cell = &mut buf[(col.x, col.y)];
let mask_cell = &mut mask_buf[(col.x, col.y)];
cell.set_symbol(mask_cell.symbol());
// blend the mask cell color with the cell color
let cell_color = cell.style().bg.unwrap_or(Color::Rgb(0, 0, 0));
let mask_color = mask_cell.style().fg.unwrap_or(Color::Rgb(255, 0, 0));
let color = blend(mask_color, cell_color, percentage);
cell.set_style(Style::new().fg(color));
}
}
}
fn blend(mask_color: Color, cell_color: Color, percentage: f64) -> Color {
let Color::Rgb(mask_red, mask_green, mask_blue) = mask_color else {
return mask_color;
};
let Color::Rgb(cell_red, cell_green, cell_blue) = cell_color else {
return mask_color;
};
let remain = 1.0 - percentage;
let red = f64::from(mask_red).mul_add(percentage, f64::from(cell_red) * remain);
let green = f64::from(mask_green).mul_add(percentage, f64::from(cell_green) * remain);
let blue = f64::from(mask_blue).mul_add(percentage, f64::from(cell_blue) * remain);
#[expect(clippy::cast_possible_truncation, clippy::cast_sign_loss)]
Color::Rgb(red as u8, green as u8, blue as u8)
}
/// a centered rect of the given size
fn centered_rect(area: Rect, width: u16, height: u16) -> Rect {
let horizontal = Layout::horizontal([width]).flex(Flex::Center);
let vertical = Layout::vertical([height]).flex(Flex::Center);
let [area] = area.layout(&vertical);
let [area] = area.layout(&horizontal);
area
}

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@@ -1,51 +0,0 @@
//! # [Ratatui] Demo2 example
//!
//! The latest version of this example is available in the [examples] folder in the repository.
//!
//! Please note that the examples are designed to be run against the `main` branch of the Github
//! repository. This means that you may not be able to compile with the latest release version on
//! crates.io, or the one that you have installed locally.
//!
//! See the [examples readme] for more information on finding examples that match the version of the
//! library you are using.
//!
//! [Ratatui]: https://github.com/ratatui/ratatui
//! [examples]: https://github.com/ratatui/ratatui/blob/main/examples
//! [examples readme]: https://github.com/ratatui/ratatui/blob/main/examples/README.md
#![allow(
clippy::missing_errors_doc,
clippy::module_name_repetitions,
clippy::must_use_candidate
)]
mod app;
mod colors;
mod destroy;
mod tabs;
mod theme;
use std::io::stdout;
use app::App;
use color_eyre::Result;
use crossterm::execute;
use crossterm::terminal::{EnterAlternateScreen, LeaveAlternateScreen};
use ratatui::layout::Rect;
use ratatui::{TerminalOptions, Viewport};
pub use self::colors::{RgbSwatch, color_from_oklab};
pub use self::theme::THEME;
fn main() -> Result<()> {
color_eyre::install()?;
// this size is to match the size of the terminal when running the demo
// using vhs in a 1280x640 sized window (github social preview size)
let viewport = Viewport::Fixed(Rect::new(0, 0, 81, 18));
let terminal = ratatui::init_with_options(TerminalOptions { viewport });
execute!(stdout(), EnterAlternateScreen).expect("failed to enter alternate screen");
let app_result = App::default().run(terminal);
execute!(stdout(), LeaveAlternateScreen).expect("failed to leave alternate screen");
ratatui::restore();
app_result
}

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@@ -1,11 +0,0 @@
mod about;
mod email;
mod recipe;
mod traceroute;
mod weather;
pub use about::AboutTab;
pub use email::EmailTab;
pub use recipe::RecipeTab;
pub use traceroute::TracerouteTab;
pub use weather::WeatherTab;

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@@ -1,73 +0,0 @@
use ratatui::buffer::Buffer;
use ratatui::layout::{Alignment, Constraint, Layout, Margin, Rect};
use ratatui::widgets::{
Block, Borders, Clear, MascotEyeColor, Padding, Paragraph, RatatuiMascot, Widget, Wrap,
};
use crate::{RgbSwatch, THEME};
#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
pub struct AboutTab {
row_index: usize,
}
impl AboutTab {
pub fn prev_row(&mut self) {
self.row_index = self.row_index.saturating_sub(1);
}
pub fn next_row(&mut self) {
self.row_index = self.row_index.saturating_add(1);
}
}
impl Widget for AboutTab {
fn render(self, area: Rect, buf: &mut Buffer) {
RgbSwatch.render(area, buf);
let layout = Layout::horizontal([Constraint::Length(34), Constraint::Min(0)]);
let [logo_area, description] = area.layout(&layout);
render_crate_description(description, buf);
let eye_state = if self.row_index % 2 == 0 {
MascotEyeColor::Default
} else {
MascotEyeColor::Red
};
RatatuiMascot::default().set_eye(eye_state).render(
logo_area.inner(Margin {
vertical: 0,
horizontal: 2,
}),
buf,
);
}
}
fn render_crate_description(area: Rect, buf: &mut Buffer) {
let area = area.inner(Margin {
vertical: 4,
horizontal: 2,
});
Clear.render(area, buf); // clear out the color swatches
Block::new().style(THEME.content).render(area, buf);
let area = area.inner(Margin {
vertical: 1,
horizontal: 2,
});
let text = "- cooking up terminal user interfaces -
Ratatui is a Rust crate that provides widgets (e.g. Paragraph, Table) and draws them to the \
screen efficiently every frame.";
Paragraph::new(text)
.style(THEME.description)
.block(
Block::new()
.title(" Ratatui ")
.title_alignment(Alignment::Center)
.borders(Borders::TOP)
.border_style(THEME.description_title)
.padding(Padding::new(0, 0, 0, 0)),
)
.wrap(Wrap { trim: true })
.scroll((0, 0))
.render(area, buf);
}

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@@ -1,156 +0,0 @@
use itertools::Itertools;
use ratatui::buffer::Buffer;
use ratatui::layout::{Constraint, Layout, Margin, Rect};
use ratatui::style::{Styled, Stylize};
use ratatui::text::Line;
use ratatui::widgets::{
Block, BorderType, Borders, Clear, List, ListItem, ListState, Padding, Paragraph, Scrollbar,
ScrollbarState, StatefulWidget, Tabs, Widget,
};
use unicode_width::UnicodeWidthStr;
use crate::{RgbSwatch, THEME};
#[derive(Debug, Default)]
pub struct Email {
from: &'static str,
subject: &'static str,
body: &'static str,
}
const EMAILS: &[Email] = &[
Email {
from: "Alice <alice@example.com>",
subject: "Hello",
body: "Hi Bob,\nHow are you?\n\nAlice",
},
Email {
from: "Bob <bob@example.com>",
subject: "Re: Hello",
body: "Hi Alice,\nI'm fine, thanks!\n\nBob",
},
Email {
from: "Charlie <charlie@example.com>",
subject: "Re: Hello",
body: "Hi Alice,\nI'm fine, thanks!\n\nCharlie",
},
Email {
from: "Dave <dave@example.com>",
subject: "Re: Hello (STOP REPLYING TO ALL)",
body: "Hi Everyone,\nPlease stop replying to all.\n\nDave",
},
Email {
from: "Eve <eve@example.com>",
subject: "Re: Hello (STOP REPLYING TO ALL)",
body: "Hi Everyone,\nI'm reading all your emails.\n\nEve",
},
];
#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
pub struct EmailTab {
row_index: usize,
}
impl EmailTab {
/// Select the previous email (with wrap around).
pub fn prev(&mut self) {
self.row_index = self.row_index.saturating_add(EMAILS.len() - 1) % EMAILS.len();
}
/// Select the next email (with wrap around).
pub fn next(&mut self) {
self.row_index = self.row_index.saturating_add(1) % EMAILS.len();
}
}
impl Widget for EmailTab {
fn render(self, area: Rect, buf: &mut Buffer) {
RgbSwatch.render(area, buf);
let area = area.inner(Margin {
vertical: 1,
horizontal: 2,
});
Clear.render(area, buf);
let layout = Layout::vertical([Constraint::Length(5), Constraint::Min(0)]);
let [inbox, email] = area.layout(&layout);
render_inbox(self.row_index, inbox, buf);
render_email(self.row_index, email, buf);
}
}
fn render_inbox(selected_index: usize, area: Rect, buf: &mut Buffer) {
let layout = Layout::vertical([Constraint::Length(1), Constraint::Min(0)]);
let [tabs, inbox] = area.layout(&layout);
let theme = THEME.email;
Tabs::new(vec![" Inbox ", " Sent ", " Drafts "])
.style(theme.tabs)
.highlight_style(theme.tabs_selected)
.select(0)
.divider("")
.render(tabs, buf);
let highlight_symbol = ">>";
let from_width = EMAILS
.iter()
.map(|e| e.from.width())
.max()
.unwrap_or_default();
let items = EMAILS.iter().map(|e| {
let from = format!("{:width$}", e.from, width = from_width).into();
ListItem::new(Line::from(vec![from, " ".into(), e.subject.into()]))
});
let mut state = ListState::default().with_selected(Some(selected_index));
StatefulWidget::render(
List::new(items)
.style(theme.inbox)
.highlight_style(theme.selected_item)
.highlight_symbol(highlight_symbol),
inbox,
buf,
&mut state,
);
let mut scrollbar_state = ScrollbarState::default()
.content_length(EMAILS.len())
.position(selected_index);
Scrollbar::default()
.begin_symbol(None)
.end_symbol(None)
.track_symbol(None)
.thumb_symbol("")
.render(inbox, buf, &mut scrollbar_state);
}
fn render_email(selected_index: usize, area: Rect, buf: &mut Buffer) {
let theme = THEME.email;
let email = EMAILS.get(selected_index);
let block = Block::new()
.style(theme.body)
.padding(Padding::new(2, 2, 0, 0))
.borders(Borders::TOP)
.border_type(BorderType::Thick);
let inner = block.inner(area);
block.render(area, buf);
if let Some(email) = email {
let layout = Layout::vertical([Constraint::Length(3), Constraint::Min(0)]);
let [headers_area, body_area] = inner.layout(&layout);
let headers = vec![
Line::from(vec![
"From: ".set_style(theme.header),
email.from.set_style(theme.header_value),
]),
Line::from(vec![
"Subject: ".set_style(theme.header),
email.subject.set_style(theme.header_value),
]),
"-".repeat(inner.width as usize).dim().into(),
];
Paragraph::new(headers)
.style(theme.body)
.render(headers_area, buf);
let body = email.body.lines().map(Line::from).collect_vec();
Paragraph::new(body)
.style(theme.body)
.render(body_area, buf);
} else {
Paragraph::new("No email selected").render(inner, buf);
}
}

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@@ -1,183 +0,0 @@
use itertools::Itertools;
use ratatui::buffer::Buffer;
use ratatui::layout::{Alignment, Constraint, Layout, Margin, Rect};
use ratatui::style::{Style, Stylize};
use ratatui::text::Line;
use ratatui::widgets::{
Block, Clear, Padding, Paragraph, Row, Scrollbar, ScrollbarOrientation, ScrollbarState,
StatefulWidget, Table, TableState, Widget, Wrap,
};
use crate::{RgbSwatch, THEME};
#[derive(Debug, Default, Clone, Copy)]
struct Ingredient {
quantity: &'static str,
name: &'static str,
}
impl Ingredient {
#[expect(clippy::cast_possible_truncation)]
fn height(&self) -> u16 {
self.name.lines().count() as u16
}
}
impl From<Ingredient> for Row<'_> {
fn from(i: Ingredient) -> Self {
Row::new(vec![i.quantity, i.name]).height(i.height())
}
}
// https://www.realsimple.com/food-recipes/browse-all-recipes/ratatouille
const RECIPE: &[(&str, &str)] = &[
(
"Step 1: ",
"Over medium-low heat, add the oil to a large skillet with the onion, garlic, and bay \
leaf, stirring occasionally, until the onion has softened.",
),
(
"Step 2: ",
"Add the eggplant and cook, stirring occasionally, for 8 minutes or until the eggplant \
has softened. Stir in the zucchini, red bell pepper, tomatoes, and salt, and cook over \
medium heat, stirring occasionally, for 5 to 7 minutes or until the vegetables are \
tender. Stir in the basil and few grinds of pepper to taste.",
),
];
const INGREDIENTS: &[Ingredient] = &[
Ingredient {
quantity: "4 tbsp",
name: "olive oil",
},
Ingredient {
quantity: "1",
name: "onion thinly sliced",
},
Ingredient {
quantity: "4",
name: "cloves garlic\npeeled and sliced",
},
Ingredient {
quantity: "1",
name: "small bay leaf",
},
Ingredient {
quantity: "1",
name: "small eggplant cut\ninto 1/2 inch cubes",
},
Ingredient {
quantity: "1",
name: "small zucchini halved\nlengthwise and cut\ninto thin slices",
},
Ingredient {
quantity: "1",
name: "red bell pepper cut\ninto slivers",
},
Ingredient {
quantity: "4",
name: "plum tomatoes\ncoarsely chopped",
},
Ingredient {
quantity: "1 tsp",
name: "kosher salt",
},
Ingredient {
quantity: "1/4 cup",
name: "shredded fresh basil\nleaves",
},
Ingredient {
quantity: "",
name: "freshly ground black\npepper",
},
];
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
pub struct RecipeTab {
row_index: usize,
}
impl RecipeTab {
/// Select the previous item in the ingredients list (with wrap around)
pub fn prev(&mut self) {
self.row_index = self.row_index.saturating_add(INGREDIENTS.len() - 1) % INGREDIENTS.len();
}
/// Select the next item in the ingredients list (with wrap around)
pub fn next(&mut self) {
self.row_index = self.row_index.saturating_add(1) % INGREDIENTS.len();
}
}
impl Widget for RecipeTab {
fn render(self, area: Rect, buf: &mut Buffer) {
RgbSwatch.render(area, buf);
let area = area.inner(Margin {
vertical: 1,
horizontal: 2,
});
Clear.render(area, buf);
Block::new()
.title("Ratatouille Recipe".bold().white())
.title_alignment(Alignment::Center)
.style(THEME.content)
.padding(Padding::new(1, 1, 2, 1))
.render(area, buf);
let scrollbar_area = Rect {
y: area.y + 2,
height: area.height - 3,
..area
};
render_scrollbar(self.row_index, scrollbar_area, buf);
let area = area.inner(Margin {
horizontal: 2,
vertical: 1,
});
let layout = Layout::horizontal([Constraint::Length(44), Constraint::Min(0)]);
let [recipe, ingredients] = area.layout(&layout);
render_recipe(recipe, buf);
render_ingredients(self.row_index, ingredients, buf);
}
}
fn render_recipe(area: Rect, buf: &mut Buffer) {
let lines = RECIPE
.iter()
.map(|(step, text)| Line::from(vec![step.white().bold(), text.gray()]))
.collect_vec();
Paragraph::new(lines)
.wrap(Wrap { trim: true })
.block(Block::new().padding(Padding::new(0, 1, 0, 0)))
.render(area, buf);
}
fn render_ingredients(selected_row: usize, area: Rect, buf: &mut Buffer) {
let mut state = TableState::default().with_selected(Some(selected_row));
let rows = INGREDIENTS.iter().copied();
let theme = THEME.recipe;
StatefulWidget::render(
Table::new(rows, [Constraint::Length(7), Constraint::Length(30)])
.block(Block::new().style(theme.ingredients))
.header(Row::new(vec!["Qty", "Ingredient"]).style(theme.ingredients_header))
.row_highlight_style(Style::new().light_yellow()),
area,
buf,
&mut state,
);
}
fn render_scrollbar(position: usize, area: Rect, buf: &mut Buffer) {
let mut state = ScrollbarState::default()
.content_length(INGREDIENTS.len())
.viewport_content_length(6)
.position(position);
Scrollbar::new(ScrollbarOrientation::VerticalRight)
.begin_symbol(None)
.end_symbol(None)
.track_symbol(None)
.thumb_symbol("")
.render(area, buf, &mut state);
}

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@@ -1,204 +0,0 @@
use itertools::Itertools;
use ratatui::buffer::Buffer;
use ratatui::layout::{Alignment, Constraint, Layout, Margin, Rect};
use ratatui::style::{Styled, Stylize};
use ratatui::symbols::Marker;
use ratatui::widgets::canvas::{self, Canvas, Map, MapResolution, Points};
use ratatui::widgets::{
Block, BorderType, Clear, Padding, Row, Scrollbar, ScrollbarOrientation, ScrollbarState,
Sparkline, StatefulWidget, Table, TableState, Widget,
};
use crate::{RgbSwatch, THEME};
#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
pub struct TracerouteTab {
row_index: usize,
}
impl TracerouteTab {
/// Select the previous row (with wrap around).
pub fn prev_row(&mut self) {
self.row_index = self.row_index.saturating_add(HOPS.len() - 1) % HOPS.len();
}
/// Select the next row (with wrap around).
pub fn next_row(&mut self) {
self.row_index = self.row_index.saturating_add(1) % HOPS.len();
}
}
impl Widget for TracerouteTab {
fn render(self, area: Rect, buf: &mut Buffer) {
RgbSwatch.render(area, buf);
let area = area.inner(Margin {
vertical: 1,
horizontal: 2,
});
Clear.render(area, buf);
Block::new().style(THEME.content).render(area, buf);
let horizontal = Layout::horizontal([Constraint::Ratio(1, 2), Constraint::Ratio(1, 2)]);
let vertical = Layout::vertical([Constraint::Min(0), Constraint::Length(3)]);
let [left, map] = area.layout(&horizontal);
let [hops, pings] = left.layout(&vertical);
render_hops(self.row_index, hops, buf);
render_ping(self.row_index, pings, buf);
render_map(self.row_index, map, buf);
}
}
fn render_hops(selected_row: usize, area: Rect, buf: &mut Buffer) {
let mut state = TableState::default().with_selected(Some(selected_row));
let rows = HOPS.iter().map(|hop| Row::new(vec![hop.host, hop.address]));
let block = Block::new()
.padding(Padding::new(1, 1, 1, 1))
.title_alignment(Alignment::Center)
.title("Traceroute bad.horse".bold().white());
StatefulWidget::render(
Table::new(rows, [Constraint::Max(100), Constraint::Length(15)])
.header(Row::new(vec!["Host", "Address"]).set_style(THEME.traceroute.header))
.row_highlight_style(THEME.traceroute.selected)
.block(block),
area,
buf,
&mut state,
);
let mut scrollbar_state = ScrollbarState::default()
.content_length(HOPS.len())
.position(selected_row);
let area = Rect {
width: area.width + 1,
y: area.y + 3,
height: area.height - 4,
..area
};
Scrollbar::default()
.orientation(ScrollbarOrientation::VerticalLeft)
.begin_symbol(None)
.end_symbol(None)
.track_symbol(None)
.thumb_symbol("")
.render(area, buf, &mut scrollbar_state);
}
pub fn render_ping(progress: usize, area: Rect, buf: &mut Buffer) {
let mut data = [
8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 2, 2, 3, 4, 5, 6, 7, 7, 8, 8, 8, 7,
7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 2, 4, 6, 7, 8, 8, 8, 8, 6, 4, 2, 1, 1, 1, 1, 2, 2, 2, 3,
3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7,
];
let mid = progress % data.len();
data.rotate_left(mid);
Sparkline::default()
.block(
Block::new()
.title("Ping")
.title_alignment(Alignment::Center)
.border_type(BorderType::Thick),
)
.data(data)
.style(THEME.traceroute.ping)
.render(area, buf);
}
fn render_map(selected_row: usize, area: Rect, buf: &mut Buffer) {
let theme = THEME.traceroute.map;
let path: Option<(&Hop, &Hop)> = HOPS.iter().tuple_windows().nth(selected_row);
let map = Map {
resolution: MapResolution::High,
color: theme.color,
};
Canvas::default()
.background_color(theme.background_color)
.block(
Block::new()
.padding(Padding::new(1, 0, 1, 0))
.style(theme.style),
)
.marker(Marker::HalfBlock)
// picked to show Australia for the demo as it's the most interesting part of the map
// (and the only part with hops ;))
.x_bounds([112.0, 155.0])
.y_bounds([-46.0, -11.0])
.paint(|context| {
context.draw(&map);
if let Some(path) = path {
context.draw(&canvas::Line::new(
path.0.location.0,
path.0.location.1,
path.1.location.0,
path.1.location.1,
theme.path,
));
context.draw(&Points {
color: theme.source,
coords: &[path.0.location], // sydney
});
context.draw(&Points {
color: theme.destination,
coords: &[path.1.location], // perth
});
}
})
.render(area, buf);
}
#[derive(Debug)]
struct Hop {
host: &'static str,
address: &'static str,
location: (f64, f64),
}
impl Hop {
const fn new(name: &'static str, address: &'static str, location: (f64, f64)) -> Self {
Self {
host: name,
address,
location,
}
}
}
const CANBERRA: (f64, f64) = (149.1, -35.3);
const SYDNEY: (f64, f64) = (151.1, -33.9);
const MELBOURNE: (f64, f64) = (144.9, -37.8);
const PERTH: (f64, f64) = (115.9, -31.9);
const DARWIN: (f64, f64) = (130.8, -12.4);
const BRISBANE: (f64, f64) = (153.0, -27.5);
const ADELAIDE: (f64, f64) = (138.6, -34.9);
// Go traceroute bad.horse some time, it's fun. these locations are made up and don't correspond
// to the actual IP addresses (which are in Toronto, Canada).
const HOPS: &[Hop] = &[
Hop::new("home", "127.0.0.1", CANBERRA),
Hop::new("bad.horse", "162.252.205.130", SYDNEY),
Hop::new("bad.horse", "162.252.205.131", MELBOURNE),
Hop::new("bad.horse", "162.252.205.132", BRISBANE),
Hop::new("bad.horse", "162.252.205.133", SYDNEY),
Hop::new("he.rides.across.the.nation", "162.252.205.134", PERTH),
Hop::new("the.thoroughbred.of.sin", "162.252.205.135", DARWIN),
Hop::new("he.got.the.application", "162.252.205.136", BRISBANE),
Hop::new("that.you.just.sent.in", "162.252.205.137", ADELAIDE),
Hop::new("it.needs.evaluation", "162.252.205.138", DARWIN),
Hop::new("so.let.the.games.begin", "162.252.205.139", PERTH),
Hop::new("a.heinous.crime", "162.252.205.140", BRISBANE),
Hop::new("a.show.of.force", "162.252.205.141", CANBERRA),
Hop::new("a.murder.would.be.nice.of.course", "162.252.205.142", PERTH),
Hop::new("bad.horse", "162.252.205.143", MELBOURNE),
Hop::new("bad.horse", "162.252.205.144", DARWIN),
Hop::new("bad.horse", "162.252.205.145", MELBOURNE),
Hop::new("he-s.bad", "162.252.205.146", PERTH),
Hop::new("the.evil.league.of.evil", "162.252.205.147", BRISBANE),
Hop::new("is.watching.so.beware", "162.252.205.148", DARWIN),
Hop::new("the.grade.that.you.receive", "162.252.205.149", PERTH),
Hop::new("will.be.your.last.we.swear", "162.252.205.150", ADELAIDE),
Hop::new("so.make.the.bad.horse.gleeful", "162.252.205.151", SYDNEY),
Hop::new("or.he-ll.make.you.his.mare", "162.252.205.152", MELBOURNE),
Hop::new("o_o", "162.252.205.153", BRISBANE),
Hop::new("you-re.saddled.up", "162.252.205.154", DARWIN),
Hop::new("there-s.no.recourse", "162.252.205.155", PERTH),
Hop::new("it-s.hi-ho.silver", "162.252.205.156", SYDNEY),
Hop::new("signed.bad.horse", "162.252.205.157", CANBERRA),
];

View File

@@ -1,161 +0,0 @@
use itertools::Itertools;
use palette::Okhsv;
use ratatui::buffer::Buffer;
use ratatui::layout::{Constraint, Direction, Layout, Margin, Rect};
use ratatui::style::{Color, Style};
use ratatui::symbols;
use ratatui::widgets::calendar::{CalendarEventStore, Monthly};
use ratatui::widgets::{Bar, BarChart, BarGroup, Block, Clear, LineGauge, Padding, Widget};
use time::OffsetDateTime;
use crate::{RgbSwatch, THEME, color_from_oklab};
#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
pub struct WeatherTab {
pub download_progress: usize,
}
impl WeatherTab {
/// Simulate a download indicator by decrementing the row index.
pub fn prev(&mut self) {
self.download_progress = self.download_progress.saturating_sub(1);
}
/// Simulate a download indicator by incrementing the row index.
pub fn next(&mut self) {
self.download_progress = self.download_progress.saturating_add(1);
}
}
impl Widget for WeatherTab {
fn render(self, area: Rect, buf: &mut Buffer) {
RgbSwatch.render(area, buf);
let area = area.inner(Margin {
vertical: 1,
horizontal: 2,
});
Clear.render(area, buf);
Block::new().style(THEME.content).render(area, buf);
let area = area.inner(Margin {
horizontal: 2,
vertical: 1,
});
let tab_layout = Layout::vertical([
Constraint::Min(0),
Constraint::Length(1),
Constraint::Length(1),
]);
let [main, _, gauges] = area.layout(&tab_layout);
let main_layout = Layout::horizontal([Constraint::Length(23), Constraint::Min(0)]);
let [calendar, charts] = main.layout(&main_layout);
let charts_layout = Layout::vertical([Constraint::Length(29), Constraint::Min(0)]);
let [simple, horizontal] = charts.layout(&charts_layout);
render_calendar(calendar, buf);
render_simple_barchart(simple, buf);
render_horizontal_barchart(horizontal, buf);
render_gauge(self.download_progress, gauges, buf);
}
}
fn render_calendar(area: Rect, buf: &mut Buffer) {
let date = OffsetDateTime::now_utc().date();
Monthly::new(date, CalendarEventStore::today(Style::new().red().bold()))
.block(Block::new().padding(Padding::new(0, 0, 2, 0)))
.show_month_header(Style::new().bold())
.show_weekdays_header(Style::new().italic())
.render(area, buf);
}
fn render_simple_barchart(area: Rect, buf: &mut Buffer) {
let data = [
("Sat", 76),
("Sun", 69),
("Mon", 65),
("Tue", 67),
("Wed", 65),
("Thu", 69),
("Fri", 73),
];
let data = data
.into_iter()
.map(|(label, value)| {
Bar::default()
.value(value)
// This doesn't actually render correctly as the text is too wide for the bar
// See https://github.com/ratatui/ratatui/issues/513 for more info
// (the demo GIFs hack around this by hacking the calculation in bars.rs)
.text_value(format!("{value}°"))
.style(if value > 70 {
Style::new().fg(Color::Red)
} else {
Style::new().fg(Color::Yellow)
})
.value_style(if value > 70 {
Style::new().fg(Color::Gray).bg(Color::Red).bold()
} else {
Style::new().fg(Color::DarkGray).bg(Color::Yellow).bold()
})
.label(label)
})
.collect_vec();
let group = BarGroup::default().bars(&data);
BarChart::default()
.data(group)
.bar_width(3)
.bar_gap(1)
.render(area, buf);
}
fn render_horizontal_barchart(area: Rect, buf: &mut Buffer) {
let bg = Color::Rgb(32, 48, 96);
let data = [
Bar::default().text_value("Winter 37-51").value(51),
Bar::default().text_value("Spring 40-65").value(65),
Bar::default().text_value("Summer 54-77").value(77),
Bar::default()
.text_value("Fall 41-71")
.value(71)
.value_style(Style::new().bold()), // current season
];
let group = BarGroup::default().label("GPU").bars(&data);
BarChart::default()
.block(Block::new().padding(Padding::new(0, 0, 2, 0)))
.direction(Direction::Horizontal)
.data(group)
.bar_gap(1)
.bar_style(Style::new().fg(bg))
.value_style(Style::new().bg(bg).fg(Color::Gray))
.render(area, buf);
}
#[expect(clippy::cast_precision_loss)]
pub fn render_gauge(progress: usize, area: Rect, buf: &mut Buffer) {
let percent = (progress * 3).min(100) as f64;
render_line_gauge(percent, area, buf);
}
#[expect(clippy::cast_possible_truncation)]
fn render_line_gauge(percent: f64, area: Rect, buf: &mut Buffer) {
// cycle color hue based on the percent for a neat effect yellow -> red
let hue = 90.0 - (percent as f32 * 0.6);
let value = Okhsv::max_value();
let filled_color = color_from_oklab(hue, Okhsv::max_saturation(), value);
let unfilled_color = color_from_oklab(hue, Okhsv::max_saturation(), value * 0.5);
let label = if percent < 100.0 {
format!("Downloading: {percent}%")
} else {
"Download Complete!".into()
};
LineGauge::default()
.ratio(percent / 100.0)
.label(label)
.style(Style::new().light_blue())
.filled_style(Style::new().fg(filled_color))
.unfilled_style(Style::new().fg(unfilled_color))
.filled_symbol(symbols::line::THICK_HORIZONTAL)
.unfilled_symbol(symbols::line::THICK_HORIZONTAL)
.render(area, buf);
}

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@@ -1,132 +0,0 @@
use ratatui::style::{Color, Modifier, Style};
pub struct Theme {
pub root: Style,
pub content: Style,
pub app_title: Style,
pub tabs: Style,
pub tabs_selected: Style,
pub borders: Style,
pub description: Style,
pub description_title: Style,
pub key_binding: KeyBinding,
pub logo: Logo,
pub email: Email,
pub traceroute: Traceroute,
pub recipe: Recipe,
}
pub struct KeyBinding {
pub key: Style,
pub description: Style,
}
pub struct Logo {
pub rat_eye: Color,
pub rat_eye_alt: Color,
}
pub struct Email {
pub tabs: Style,
pub tabs_selected: Style,
pub inbox: Style,
pub item: Style,
pub selected_item: Style,
pub header: Style,
pub header_value: Style,
pub body: Style,
}
pub struct Traceroute {
pub header: Style,
pub selected: Style,
pub ping: Style,
pub map: Map,
}
pub struct Map {
pub style: Style,
pub color: Color,
pub path: Color,
pub source: Color,
pub destination: Color,
pub background_color: Color,
}
pub struct Recipe {
pub ingredients: Style,
pub ingredients_header: Style,
}
pub const THEME: Theme = Theme {
root: Style::new().bg(DARK_BLUE),
content: Style::new().bg(DARK_BLUE).fg(LIGHT_GRAY),
app_title: Style::new()
.fg(WHITE)
.bg(DARK_BLUE)
.add_modifier(Modifier::BOLD),
tabs: Style::new().fg(MID_GRAY).bg(DARK_BLUE),
tabs_selected: Style::new()
.fg(WHITE)
.bg(DARK_BLUE)
.add_modifier(Modifier::BOLD)
.add_modifier(Modifier::REVERSED),
borders: Style::new().fg(LIGHT_GRAY),
description: Style::new().fg(LIGHT_GRAY).bg(DARK_BLUE),
description_title: Style::new().fg(LIGHT_GRAY).add_modifier(Modifier::BOLD),
logo: Logo {
rat_eye: BLACK,
rat_eye_alt: RED,
},
key_binding: KeyBinding {
key: Style::new().fg(BLACK).bg(DARK_GRAY),
description: Style::new().fg(DARK_GRAY).bg(BLACK),
},
email: Email {
tabs: Style::new().fg(MID_GRAY).bg(DARK_BLUE),
tabs_selected: Style::new()
.fg(WHITE)
.bg(DARK_BLUE)
.add_modifier(Modifier::BOLD),
inbox: Style::new().bg(DARK_BLUE).fg(LIGHT_GRAY),
item: Style::new().fg(LIGHT_GRAY),
selected_item: Style::new().fg(LIGHT_YELLOW),
header: Style::new().add_modifier(Modifier::BOLD),
header_value: Style::new().fg(LIGHT_GRAY),
body: Style::new().bg(DARK_BLUE).fg(LIGHT_GRAY),
},
traceroute: Traceroute {
header: Style::new()
.bg(DARK_BLUE)
.add_modifier(Modifier::BOLD)
.add_modifier(Modifier::UNDERLINED),
selected: Style::new().fg(LIGHT_YELLOW),
ping: Style::new().fg(WHITE),
map: Map {
style: Style::new().bg(DARK_BLUE),
background_color: DARK_BLUE,
color: LIGHT_GRAY,
path: LIGHT_BLUE,
source: LIGHT_GREEN,
destination: LIGHT_RED,
},
},
recipe: Recipe {
ingredients: Style::new().bg(DARK_BLUE).fg(LIGHT_GRAY),
ingredients_header: Style::new()
.add_modifier(Modifier::BOLD)
.add_modifier(Modifier::UNDERLINED),
},
};
const DARK_BLUE: Color = Color::Rgb(16, 24, 48);
const LIGHT_BLUE: Color = Color::Rgb(64, 96, 192);
const LIGHT_YELLOW: Color = Color::Rgb(192, 192, 96);
const LIGHT_GREEN: Color = Color::Rgb(64, 192, 96);
const LIGHT_RED: Color = Color::Rgb(192, 96, 96);
const RED: Color = Color::Rgb(215, 0, 0);
const BLACK: Color = Color::Rgb(8, 8, 8); // not really black, often #080808
const DARK_GRAY: Color = Color::Rgb(68, 68, 68);
const MID_GRAY: Color = Color::Rgb(128, 128, 128);
const LIGHT_GRAY: Color = Color::Rgb(188, 188, 188);
const WHITE: Color = Color::Rgb(238, 238, 238); // not really white, often #eeeeee

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@@ -1,15 +0,0 @@
[package]
name = "flex"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
ratatui.workspace = true
strum.workspace = true
[lints]
workspace = true

View File

@@ -1,9 +0,0 @@
# Flex demo
This interactive example shows how to use the flex layouts.
To run this demo:
```shell
cargo run -p flex
```

View File

@@ -1,531 +0,0 @@
/// A Ratatui example that demonstrates different types of flex layouts.
///
/// You can also change the spacing between the constraints, and toggle between different types
/// of flex layouts.
///
/// This example runs with the Ratatui library code in the branch that you are currently
/// reading. See the [`latest`] branch for the code which works with the most recent Ratatui
/// release.
///
/// [`latest`]: https://github.com/ratatui/ratatui/tree/latest
use std::num::NonZeroUsize;
use color_eyre::Result;
use crossterm::event::{self, KeyCode};
use ratatui::DefaultTerminal;
use ratatui::buffer::Buffer;
use ratatui::layout::Constraint::{self, Fill, Length, Max, Min, Percentage, Ratio};
use ratatui::layout::{Alignment, Flex, Layout, Rect};
use ratatui::style::palette::tailwind;
use ratatui::style::{Color, Modifier, Style, Stylize};
use ratatui::symbols::{self, line};
use ratatui::text::{Line, Text};
use ratatui::widgets::{
Block, Paragraph, Scrollbar, ScrollbarOrientation, ScrollbarState, StatefulWidget, Tabs, Widget,
};
use strum::{Display, EnumIter, FromRepr, IntoEnumIterator};
fn main() -> Result<()> {
color_eyre::install()?;
ratatui::run(|terminal| App::default().run(terminal))
}
const EXAMPLE_DATA: &[(&str, &[Constraint])] = &[
(
"Min(u16) takes any excess space always",
&[Length(10), Min(10), Max(10), Percentage(10), Ratio(1, 10)],
),
(
"Fill(u16) takes any excess space always",
&[Length(20), Percentage(20), Ratio(1, 5), Fill(1)],
),
(
"Here's all constraints in one line",
&[
Length(10),
Min(10),
Max(10),
Percentage(10),
Ratio(1, 10),
Fill(1),
],
),
("", &[Max(50), Min(50)]),
("", &[Max(20), Length(10)]),
("", &[Max(20), Length(10)]),
(
"Min grows always but also allows Fill to grow",
&[Percentage(50), Fill(1), Fill(2), Min(50)],
),
(
"In `Legacy`, the last constraint of lowest priority takes excess space",
&[Length(20), Length(20), Percentage(20)],
),
("", &[Length(20), Percentage(20), Length(20)]),
(
"A lowest priority constraint will be broken before a high priority constraint",
&[Ratio(1, 4), Percentage(20)],
),
(
"`Length` is higher priority than `Percentage`",
&[Percentage(20), Length(10)],
),
(
"`Min/Max` is higher priority than `Length`",
&[Length(10), Max(20)],
),
("", &[Length(100), Min(20)]),
(
"`Length` is higher priority than `Min/Max`",
&[Max(20), Length(10)],
),
("", &[Min(20), Length(90)]),
(
"Fill is the lowest priority and will fill any excess space",
&[Fill(1), Ratio(1, 4)],
),
(
"Fill can be used to scale proportionally with other Fill blocks",
&[Fill(1), Percentage(20), Fill(2)],
),
("", &[Ratio(1, 3), Percentage(20), Ratio(2, 3)]),
(
"Legacy will stretch the last lowest priority constraint\nStretch will only stretch equal weighted constraints",
&[Length(20), Length(15)],
),
("", &[Percentage(20), Length(15)]),
(
"`Fill(u16)` fills up excess space, but is lower priority to spacers.\ni.e. Fill will only have widths in Flex::Stretch and Flex::Legacy",
&[Fill(1), Fill(1)],
),
("", &[Length(20), Length(20)]),
(
"When not using `Flex::Stretch` or `Flex::Legacy`,\n`Min(u16)` and `Max(u16)` collapse to their lowest values",
&[Min(20), Max(20)],
),
("", &[Max(20)]),
("", &[Min(20), Max(20), Length(20), Length(20)]),
("", &[Fill(0), Fill(0)]),
(
"`Fill(1)` can be to scale with respect to other `Fill(2)`",
&[Fill(1), Fill(2)],
),
("", &[Fill(1), Min(10), Max(10), Fill(2)]),
(
"`Fill(0)` collapses if there are other non-zero `Fill(_)`\nconstraints. e.g. `[Fill(0), Fill(0), Fill(1)]`:",
&[Fill(0), Fill(0), Fill(1)],
),
];
#[derive(Default, Clone, Copy)]
struct App {
selected_tab: SelectedTab,
scroll_offset: u16,
spacing: u16,
state: AppState,
}
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
enum AppState {
#[default]
Running,
Quit,
}
#[derive(Debug, Clone, PartialEq, Eq)]
struct Example {
constraints: Vec<Constraint>,
description: String,
flex: Flex,
spacing: u16,
}
/// Tabs for the different layouts
///
/// Note: the order of the variants will determine the order of the tabs this uses several derive
/// macros from the `strum` crate to make it easier to iterate over the variants.
/// (`FromRepr`,`Display`,`EnumIter`).
#[derive(Default, Debug, Copy, Clone, PartialEq, Eq, FromRepr, Display, EnumIter)]
enum SelectedTab {
#[default]
Legacy,
Start,
Center,
End,
SpaceAround,
SpaceEvenly,
SpaceBetween,
}
impl App {
fn run(mut self, terminal: &mut DefaultTerminal) -> Result<()> {
// increase the layout cache to account for the number of layout events. This ensures that
// layout is not generally reprocessed on every frame (which would lead to possible janky
// results when there are more than one possible solution to the requested layout). This
// assumes the user changes spacing about a 100 times or so.
let cache_size = EXAMPLE_DATA.len() * SelectedTab::iter().len() * 100;
Layout::init_cache(NonZeroUsize::new(cache_size).unwrap());
while self.is_running() {
terminal.draw(|frame| frame.render_widget(self, frame.area()))?;
self.handle_events()?;
}
Ok(())
}
fn is_running(self) -> bool {
self.state == AppState::Running
}
fn handle_events(&mut self) -> Result<()> {
if let Some(key) = event::read()?.as_key_press_event() {
match key.code {
KeyCode::Char('q') | KeyCode::Esc => self.quit(),
KeyCode::Char('l') | KeyCode::Right => self.next(),
KeyCode::Char('h') | KeyCode::Left => self.previous(),
KeyCode::Char('j') | KeyCode::Down => self.down(),
KeyCode::Char('k') | KeyCode::Up => self.up(),
KeyCode::Char('g') | KeyCode::Home => self.top(),
KeyCode::Char('G') | KeyCode::End => self.bottom(),
KeyCode::Char('+') => self.increment_spacing(),
KeyCode::Char('-') => self.decrement_spacing(),
_ => (),
}
}
Ok(())
}
fn next(&mut self) {
self.selected_tab = self.selected_tab.next();
}
fn previous(&mut self) {
self.selected_tab = self.selected_tab.previous();
}
const fn up(&mut self) {
self.scroll_offset = self.scroll_offset.saturating_sub(1);
}
fn down(&mut self) {
self.scroll_offset = self
.scroll_offset
.saturating_add(1)
.min(max_scroll_offset());
}
const fn top(&mut self) {
self.scroll_offset = 0;
}
fn bottom(&mut self) {
self.scroll_offset = max_scroll_offset();
}
const fn increment_spacing(&mut self) {
self.spacing = self.spacing.saturating_add(1);
}
const fn decrement_spacing(&mut self) {
self.spacing = self.spacing.saturating_sub(1);
}
const fn quit(&mut self) {
self.state = AppState::Quit;
}
}
// when scrolling, make sure we don't scroll past the last example
fn max_scroll_offset() -> u16 {
example_height()
- EXAMPLE_DATA
.last()
.map_or(0, |(desc, _)| get_description_height(desc) + 4)
}
/// The height of all examples combined
///
/// Each may or may not have a title so we need to account for that.
fn example_height() -> u16 {
EXAMPLE_DATA
.iter()
.map(|(desc, _)| get_description_height(desc) + 4)
.sum()
}
impl Widget for App {
fn render(self, area: Rect, buf: &mut Buffer) {
let layout = Layout::vertical([Length(3), Length(1), Fill(0)]);
let [tabs, axis, demo] = area.layout(&layout);
self.tabs().render(tabs, buf);
let scroll_needed = self.render_demo(demo, buf);
let axis_width = if scroll_needed {
axis.width.saturating_sub(1)
} else {
axis.width
};
Self::axis(axis_width, self.spacing).render(axis, buf);
}
}
impl App {
fn tabs(self) -> impl Widget {
let tab_titles = SelectedTab::iter().map(SelectedTab::to_tab_title);
let block = Block::new()
.title("Flex Layouts ".bold())
.title(" Use ◄ ► to change tab, ▲ ▼ to scroll, - + to change spacing ");
Tabs::new(tab_titles)
.block(block)
.highlight_style(Modifier::REVERSED)
.select(self.selected_tab as usize)
.divider(" ")
.padding("", "")
}
/// a bar like `<----- 80 px (gap: 2 px)? ----->`
fn axis(width: u16, spacing: u16) -> impl Widget {
let width = width as usize;
// only show gap when spacing is not zero
let label = if spacing != 0 {
format!("{width} px (gap: {spacing} px)")
} else {
format!("{width} px")
};
let bar_width = width.saturating_sub(2); // we want to `<` and `>` at the ends
let width_bar = format!("<{label:-^bar_width$}>");
Paragraph::new(width_bar.dark_gray()).centered()
}
/// Render the demo content
///
/// This function renders the demo content into a separate buffer and then splices the buffer
/// into the main buffer. This is done to make it possible to handle scrolling easily.
///
/// Returns bool indicating whether scroll was needed
#[expect(clippy::cast_possible_truncation)]
fn render_demo(self, area: Rect, buf: &mut Buffer) -> bool {
// render demo content into a separate buffer so all examples fit we add an extra
// area.height to make sure the last example is fully visible even when the scroll offset is
// at the max
let height = example_height();
let demo_area = Rect::new(0, 0, area.width, height);
let mut demo_buf = Buffer::empty(demo_area);
let scrollbar_needed = self.scroll_offset != 0 || height > area.height;
let content_area = if scrollbar_needed {
Rect {
width: demo_area.width - 1,
..demo_area
}
} else {
demo_area
};
let mut spacing = self.spacing;
self.selected_tab
.render(content_area, &mut demo_buf, &mut spacing);
let visible_content = demo_buf
.content
.into_iter()
.skip((area.width * self.scroll_offset) as usize)
.take(area.area() as usize);
for (i, cell) in visible_content.enumerate() {
let x = i as u16 % area.width;
let y = i as u16 / area.width;
buf[(area.x + x, area.y + y)] = cell;
}
if scrollbar_needed {
let area = area.intersection(buf.area);
let mut state = ScrollbarState::new(max_scroll_offset() as usize)
.position(self.scroll_offset as usize);
Scrollbar::new(ScrollbarOrientation::VerticalRight).render(area, buf, &mut state);
}
scrollbar_needed
}
}
impl SelectedTab {
/// Get the previous tab, if there is no previous tab return the current tab.
fn previous(self) -> Self {
let current_index: usize = self as usize;
let previous_index = current_index.saturating_sub(1);
Self::from_repr(previous_index).unwrap_or(self)
}
/// Get the next tab, if there is no next tab return the current tab.
fn next(self) -> Self {
let current_index = self as usize;
let next_index = current_index.saturating_add(1);
Self::from_repr(next_index).unwrap_or(self)
}
/// Convert a `SelectedTab` into a `Line` to display it by the `Tabs` widget.
fn to_tab_title(value: Self) -> Line<'static> {
use tailwind::{INDIGO, ORANGE, SKY};
let text = value.to_string();
let color = match value {
Self::Legacy => ORANGE.c400,
Self::Start => SKY.c400,
Self::Center => SKY.c300,
Self::End => SKY.c200,
Self::SpaceEvenly => INDIGO.c400,
Self::SpaceBetween => INDIGO.c300,
Self::SpaceAround => INDIGO.c500,
};
format!(" {text} ").fg(color).bg(Color::Black).into()
}
}
impl StatefulWidget for SelectedTab {
type State = u16;
fn render(self, area: Rect, buf: &mut Buffer, spacing: &mut Self::State) {
let spacing = *spacing;
match self {
Self::Legacy => Self::render_examples(area, buf, Flex::Legacy, spacing),
Self::Start => Self::render_examples(area, buf, Flex::Start, spacing),
Self::Center => Self::render_examples(area, buf, Flex::Center, spacing),
Self::End => Self::render_examples(area, buf, Flex::End, spacing),
Self::SpaceEvenly => Self::render_examples(area, buf, Flex::SpaceEvenly, spacing),
Self::SpaceBetween => Self::render_examples(area, buf, Flex::SpaceBetween, spacing),
Self::SpaceAround => Self::render_examples(area, buf, Flex::SpaceAround, spacing),
}
}
}
impl SelectedTab {
fn render_examples(area: Rect, buf: &mut Buffer, flex: Flex, spacing: u16) {
let heights = EXAMPLE_DATA
.iter()
.map(|(desc, _)| get_description_height(desc) + 4);
let areas = Layout::vertical(heights).flex(Flex::Start).split(area);
for (area, (description, constraints)) in areas.iter().zip(EXAMPLE_DATA.iter()) {
Example::new(constraints, description, flex, spacing).render(*area, buf);
}
}
}
impl Example {
fn new(constraints: &[Constraint], description: &str, flex: Flex, spacing: u16) -> Self {
Self {
constraints: constraints.into(),
description: description.into(),
flex,
spacing,
}
}
}
impl Widget for Example {
fn render(self, area: Rect, buf: &mut Buffer) {
let title_height = get_description_height(&self.description);
let layout = Layout::vertical([Length(title_height), Fill(0)]);
let [title, illustrations] = area.layout(&layout);
let (blocks, spacers) = Layout::horizontal(&self.constraints)
.flex(self.flex)
.spacing(self.spacing)
.split_with_spacers(illustrations);
if !self.description.is_empty() {
Paragraph::new(
self.description
.split('\n')
.map(|s| format!("// {s}").italic().fg(tailwind::SLATE.c400))
.map(Line::from)
.collect::<Vec<Line>>(),
)
.render(title, buf);
}
for (block, constraint) in blocks.iter().zip(&self.constraints) {
Self::illustration(*constraint, block.width).render(*block, buf);
}
for spacer in spacers.iter() {
Self::render_spacer(*spacer, buf);
}
}
}
impl Example {
fn render_spacer(spacer: Rect, buf: &mut Buffer) {
if spacer.width > 1 {
let corners_only = symbols::border::Set {
top_left: line::NORMAL.top_left,
top_right: line::NORMAL.top_right,
bottom_left: line::NORMAL.bottom_left,
bottom_right: line::NORMAL.bottom_right,
vertical_left: " ",
vertical_right: " ",
horizontal_top: " ",
horizontal_bottom: " ",
};
Block::bordered()
.border_set(corners_only)
.border_style(Style::reset().dark_gray())
.render(spacer, buf);
} else {
Paragraph::new(Text::from(vec![
Line::from(""),
Line::from(""),
Line::from(""),
Line::from(""),
]))
.style(Style::reset().dark_gray())
.render(spacer, buf);
}
let width = spacer.width;
let label = if width > 4 {
format!("{width} px")
} else if width > 2 {
format!("{width}")
} else {
String::new()
};
let text = Text::from(vec![
Line::raw(""),
Line::raw(""),
Line::styled(label, Style::reset().dark_gray()),
]);
Paragraph::new(text)
.style(Style::reset().dark_gray())
.alignment(Alignment::Center)
.render(spacer, buf);
}
fn illustration(constraint: Constraint, width: u16) -> impl Widget {
let main_color = color_for_constraint(constraint);
let fg_color = Color::White;
let title = format!("{constraint}");
let content = format!("{width} px");
let text = format!("{title}\n{content}");
let block = Block::bordered()
.border_set(symbols::border::QUADRANT_OUTSIDE)
.border_style(Style::reset().fg(main_color).reversed())
.style(Style::default().fg(fg_color).bg(main_color));
Paragraph::new(text).centered().block(block)
}
}
const fn color_for_constraint(constraint: Constraint) -> Color {
use tailwind::{BLUE, SLATE};
match constraint {
Constraint::Min(_) => BLUE.c900,
Constraint::Max(_) => BLUE.c800,
Constraint::Length(_) => SLATE.c700,
Constraint::Percentage(_) => SLATE.c800,
Constraint::Ratio(_, _) => SLATE.c900,
Constraint::Fill(_) => SLATE.c950,
}
}
#[expect(clippy::cast_possible_truncation)]
fn get_description_height(s: &str) -> u16 {
if s.is_empty() {
0
} else {
s.split('\n').count() as u16
}
}

View File

@@ -1,14 +0,0 @@
[package]
name = "gauge"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
ratatui.workspace = true
[lints]
workspace = true

View File

@@ -1,9 +0,0 @@
# Gauge demo
This example shows different types of gauges.
To run this demo:
```shell
cargo run -p gauge
```

View File

@@ -1,192 +0,0 @@
/// A Ratatui example that demonstrates different types of gauges.
///
/// This example runs with the Ratatui library code in the branch that you are currently
/// reading. See the [`latest`] branch for the code which works with the most recent Ratatui
/// release.
///
/// [`latest`]: https://github.com/ratatui/ratatui/tree/latest
use std::time::Duration;
use color_eyre::Result;
use crossterm::event::{self, KeyCode};
use ratatui::DefaultTerminal;
use ratatui::buffer::Buffer;
use ratatui::layout::{Alignment, Constraint, Layout, Rect};
use ratatui::style::palette::tailwind;
use ratatui::style::{Color, Style, Stylize};
use ratatui::text::{Line, Span};
use ratatui::widgets::{Block, Borders, Gauge, Padding, Paragraph, Widget};
const GAUGE1_COLOR: Color = tailwind::RED.c800;
const GAUGE2_COLOR: Color = tailwind::GREEN.c800;
const GAUGE3_COLOR: Color = tailwind::BLUE.c800;
const GAUGE4_COLOR: Color = tailwind::ORANGE.c800;
const CUSTOM_LABEL_COLOR: Color = tailwind::SLATE.c200;
#[derive(Debug, Default, Clone, Copy)]
struct App {
state: AppState,
progress_columns: u16,
progress1: u16,
progress2: f64,
progress3: f64,
progress4: f64,
}
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq)]
enum AppState {
#[default]
Running,
Started,
Quitting,
}
fn main() -> Result<()> {
color_eyre::install()?;
ratatui::run(|terminal| App::default().run(terminal))
}
impl App {
fn run(mut self, terminal: &mut DefaultTerminal) -> Result<()> {
while self.state != AppState::Quitting {
terminal.draw(|frame| frame.render_widget(&self, frame.area()))?;
self.handle_events()?;
self.update(terminal.size()?.width);
}
Ok(())
}
fn update(&mut self, terminal_width: u16) {
if self.state != AppState::Started {
return;
}
// progress1 and progress2 help show the difference between ratio and percentage measuring
// the same thing, but converting to either a u16 or f64. Effectively, we're showing the
// difference between how a continuous gauge acts for floor and rounded values.
self.progress_columns = (self.progress_columns + 1).clamp(0, terminal_width);
self.progress1 = self.progress_columns * 100 / terminal_width;
self.progress2 = f64::from(self.progress_columns) * 100.0 / f64::from(terminal_width);
// progress3 and progress4 similarly show the difference between unicode and non-unicode
// gauges measuring the same thing.
self.progress3 = (self.progress3 + 0.1).clamp(40.0, 100.0);
self.progress4 = (self.progress4 + 0.1).clamp(40.0, 100.0);
}
fn handle_events(&mut self) -> Result<()> {
let timeout = Duration::from_secs_f32(1.0 / 20.0);
if !event::poll(timeout)? {
return Ok(());
}
if let Some(key) = event::read()?.as_key_press_event() {
match key.code {
KeyCode::Char(' ') | KeyCode::Enter => self.start(),
KeyCode::Char('q') | KeyCode::Esc => self.quit(),
_ => {}
}
}
Ok(())
}
const fn start(&mut self) {
self.state = AppState::Started;
}
const fn quit(&mut self) {
self.state = AppState::Quitting;
}
}
impl Widget for &App {
#[expect(clippy::similar_names)]
fn render(self, area: Rect, buf: &mut Buffer) {
use Constraint::{Length, Min, Ratio};
let layout = Layout::vertical([Length(2), Min(0), Length(1)]);
let [header_area, gauge_area, footer_area] = area.layout(&layout);
let layout = Layout::vertical([Ratio(1, 4); 4]);
let [gauge1_area, gauge2_area, gauge3_area, gauge4_area] = gauge_area.layout(&layout);
render_header(header_area, buf);
render_footer(footer_area, buf);
self.render_gauge1(gauge1_area, buf);
self.render_gauge2(gauge2_area, buf);
self.render_gauge3(gauge3_area, buf);
self.render_gauge4(gauge4_area, buf);
}
}
fn render_header(area: Rect, buf: &mut Buffer) {
Paragraph::new("Ratatui Gauge Example")
.bold()
.alignment(Alignment::Center)
.fg(CUSTOM_LABEL_COLOR)
.render(area, buf);
}
fn render_footer(area: Rect, buf: &mut Buffer) {
Paragraph::new("Press ENTER to start")
.alignment(Alignment::Center)
.fg(CUSTOM_LABEL_COLOR)
.bold()
.render(area, buf);
}
impl App {
fn render_gauge1(&self, area: Rect, buf: &mut Buffer) {
let title = title_block("Gauge with percentage");
Gauge::default()
.block(title)
.gauge_style(GAUGE1_COLOR)
.percent(self.progress1)
.render(area, buf);
}
fn render_gauge2(&self, area: Rect, buf: &mut Buffer) {
let title = title_block("Gauge with ratio and custom label");
let label = Span::styled(
format!("{:.1}/100", self.progress2),
Style::new().italic().bold().fg(CUSTOM_LABEL_COLOR),
);
Gauge::default()
.block(title)
.gauge_style(GAUGE2_COLOR)
.ratio(self.progress2 / 100.0)
.label(label)
.render(area, buf);
}
fn render_gauge3(&self, area: Rect, buf: &mut Buffer) {
let title = title_block("Gauge with ratio (no unicode)");
let label = format!("{:.1}%", self.progress3);
Gauge::default()
.block(title)
.gauge_style(GAUGE3_COLOR)
.ratio(self.progress3 / 100.0)
.label(label)
.render(area, buf);
}
fn render_gauge4(&self, area: Rect, buf: &mut Buffer) {
let title = title_block("Gauge with ratio (unicode)");
let label = format!("{:.1}%", self.progress3);
Gauge::default()
.block(title)
.gauge_style(GAUGE4_COLOR)
.ratio(self.progress4 / 100.0)
.label(label)
.use_unicode(true)
.render(area, buf);
}
}
fn title_block(title: &str) -> Block<'_> {
let title = Line::from(title).centered();
Block::new()
.borders(Borders::NONE)
.padding(Padding::vertical(1))
.title(title)
.fg(CUSTOM_LABEL_COLOR)
}

View File

@@ -1,14 +0,0 @@
[package]
name = "hello-world"
publish = false
license.workspace = true
edition.workspace = true
rust-version.workspace = true
[dependencies]
color-eyre.workspace = true
crossterm.workspace = true
ratatui.workspace = true
[lints]
workspace = true

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