23516bce76
All urls updated to point at https://github.com/ratatui To update your repository remotes, you can run the following commands: ```shell git remote set-url origin https://github.com/ratatui/ratatui ```
2527 lines
121 KiB
Rust
2527 lines
121 KiB
Rust
use std::{cell::RefCell, collections::HashMap, iter, num::NonZeroUsize, rc::Rc};
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use cassowary::{
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strength::REQUIRED,
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AddConstraintError, Expression, Solver, Variable,
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WeightedRelation::{EQ, GE, LE},
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};
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use itertools::Itertools;
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use lru::LruCache;
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use self::strengths::{
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ALL_SEGMENT_GROW, FILL_GROW, GROW, LENGTH_SIZE_EQ, MAX_SIZE_EQ, MAX_SIZE_LE, MIN_SIZE_EQ,
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MIN_SIZE_GE, PERCENTAGE_SIZE_EQ, RATIO_SIZE_EQ, SPACER_SIZE_EQ, SPACE_GROW,
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};
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use super::Flex;
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use crate::prelude::*;
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type Rects = Rc<[Rect]>;
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type Segments = Rects;
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type Spacers = Rects;
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// The solution to a Layout solve contains two `Rects`, where `Rects` is effectively a `[Rect]`.
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//
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// 1. `[Rect]` that contains positions for the segments corresponding to user provided constraints
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// 2. `[Rect]` that contains spacers around the user provided constraints
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//
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// <------------------------------------80 px------------------------------------->
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// ┌ ┐┌──────────────────┐┌ ┐┌──────────────────┐┌ ┐┌──────────────────┐┌ ┐
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// 1 │ a │ 2 │ b │ 3 │ c │ 4
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// └ ┘└──────────────────┘└ ┘└──────────────────┘└ ┘└──────────────────┘└ ┘
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//
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// Number of spacers will always be one more than number of segments.
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type Cache = LruCache<(Rect, Layout), (Segments, Spacers)>;
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// Multiplier that decides floating point precision when rounding.
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// The number of zeros in this number is the precision for the rounding of f64 to u16 in layout
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// calculations.
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const FLOAT_PRECISION_MULTIPLIER: f64 = 100.0;
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thread_local! {
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static LAYOUT_CACHE: RefCell<Cache> = RefCell::new(Cache::new(
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NonZeroUsize::new(Layout::DEFAULT_CACHE_SIZE).unwrap(),
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));
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}
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/// A layout is a set of constraints that can be applied to a given area to split it into smaller
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/// ones.
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///
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/// A layout is composed of:
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/// - a direction (horizontal or vertical)
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/// - a set of constraints (length, ratio, percentage, fill, min, max)
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/// - a margin (horizontal and vertical), the space between the edge of the main area and the split
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/// areas
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/// - a flex option
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/// - a spacing option
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///
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/// The algorithm used to compute the layout is based on the [`cassowary-rs`] solver. It is a simple
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/// linear solver that can be used to solve linear equations and inequalities. In our case, we
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/// define a set of constraints that are applied to split the provided area into Rects aligned in a
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/// single direction, and the solver computes the values of the position and sizes that satisfy as
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/// many of the constraints in order of their priorities.
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///
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/// When the layout is computed, the result is cached in a thread-local cache, so that subsequent
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/// calls with the same parameters are faster. The cache is a `LruCache`, and the size of the cache
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/// can be configured using [`Layout::init_cache()`].
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///
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/// # Constructors
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///
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/// There are four ways to create a new layout:
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///
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/// - [`Layout::default`]: create a new layout with default values
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/// - [`Layout::new`]: create a new layout with a given direction and constraints
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/// - [`Layout::vertical`]: create a new vertical layout with the given constraints
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/// - [`Layout::horizontal`]: create a new horizontal layout with the given constraints
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///
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/// # Setters
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///
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/// There are several setters to modify the layout:
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///
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/// - [`Layout::direction`]: set the direction of the layout
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/// - [`Layout::constraints`]: set the constraints of the layout
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/// - [`Layout::margin`]: set the margin of the layout
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/// - [`Layout::horizontal_margin`]: set the horizontal margin of the layout
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/// - [`Layout::vertical_margin`]: set the vertical margin of the layout
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/// - [`Layout::flex`]: set the way the space is distributed when the constraints are satisfied
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/// - [`Layout::spacing`]: sets the gap between the constraints of the layout
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///
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/// # Example
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///
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/// ```rust
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/// use ratatui::{prelude::*, widgets::*};
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///
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/// fn render(frame: &mut Frame, area: Rect) {
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/// let layout = Layout::new(
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/// Direction::Vertical,
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/// [Constraint::Length(5), Constraint::Min(0)],
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/// )
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/// .split(Rect::new(0, 0, 10, 10));
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/// frame.render_widget(Paragraph::new("foo"), layout[0]);
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/// frame.render_widget(Paragraph::new("bar"), layout[1]);
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/// }
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/// ```
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///
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/// See the `layout`, `flex`, and `constraints` examples in the [Examples] folder for more details
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/// about how to use layouts.
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///
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/// 
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///
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/// [`cassowary-rs`]: https://crates.io/crates/cassowary
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/// [Examples]: https://github.com/ratatui/ratatui/blob/main/examples/README.md
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#[derive(Debug, Default, Clone, Eq, PartialEq, Hash)]
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pub struct Layout {
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direction: Direction,
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constraints: Vec<Constraint>,
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margin: Margin,
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flex: Flex,
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spacing: u16,
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}
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impl Layout {
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/// This is a somewhat arbitrary size for the layout cache based on adding the columns and rows
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/// on my laptop's terminal (171+51 = 222) and doubling it for good measure and then adding a
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/// bit more to make it a round number. This gives enough entries to store a layout for every
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/// row and every column, twice over, which should be enough for most apps. For those that need
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/// more, the cache size can be set with [`Layout::init_cache()`].
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pub const DEFAULT_CACHE_SIZE: usize = 500;
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/// Creates a new layout with default values.
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///
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/// The `constraints` parameter accepts any type that implements `IntoIterator<Item =
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/// Into<Constraint>>`. This includes arrays, slices, vectors, iterators. `Into<Constraint>` is
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/// implemented on `u16`, so you can pass an array, `Vec`, etc. of `u16` to this function to
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/// create a layout with fixed size chunks.
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///
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/// Default values for the other fields are:
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///
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/// - `margin`: 0, 0
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/// - `flex`: [`Flex::Start`]
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/// - `spacing`: 0
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///
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/// # Examples
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///
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/// ```rust
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/// # use ratatui::prelude::*;
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/// Layout::new(
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/// Direction::Horizontal,
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/// [Constraint::Length(5), Constraint::Min(0)],
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/// );
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///
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/// Layout::new(
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/// Direction::Vertical,
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/// [1, 2, 3].iter().map(|&c| Constraint::Length(c)),
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/// );
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///
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/// Layout::new(Direction::Horizontal, vec![1, 2]);
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/// ```
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pub fn new<I>(direction: Direction, constraints: I) -> Self
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where
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I: IntoIterator,
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I::Item: Into<Constraint>,
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{
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Self {
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direction,
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constraints: constraints.into_iter().map(Into::into).collect(),
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..Self::default()
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}
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}
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/// Creates a new vertical layout with default values.
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///
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/// The `constraints` parameter accepts any type that implements `IntoIterator<Item =
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/// Into<Constraint>>`. This includes arrays, slices, vectors, iterators, etc.
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///
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/// # Examples
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///
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/// ```rust
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/// # use ratatui::prelude::*;
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/// let layout = Layout::vertical([Constraint::Length(5), Constraint::Min(0)]);
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/// ```
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pub fn vertical<I>(constraints: I) -> Self
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where
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I: IntoIterator,
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I::Item: Into<Constraint>,
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{
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Self::new(Direction::Vertical, constraints.into_iter().map(Into::into))
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}
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/// Creates a new horizontal layout with default values.
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///
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/// The `constraints` parameter accepts any type that implements `IntoIterator<Item =
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/// Into<Constraint>>`. This includes arrays, slices, vectors, iterators, etc.
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///
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/// # Examples
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///
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/// ```rust
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/// # use ratatui::prelude::*;
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/// let layout = Layout::horizontal([Constraint::Length(5), Constraint::Min(0)]);
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/// ```
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pub fn horizontal<I>(constraints: I) -> Self
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where
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I: IntoIterator,
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I::Item: Into<Constraint>,
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{
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Self::new(
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Direction::Horizontal,
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constraints.into_iter().map(Into::into),
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)
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}
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/// Initialize an empty cache with a custom size. The cache is keyed on the layout and area, so
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/// that subsequent calls with the same parameters are faster. The cache is a `LruCache`, and
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/// grows until `cache_size` is reached.
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///
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/// By default, the cache size is [`Self::DEFAULT_CACHE_SIZE`].
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pub fn init_cache(cache_size: NonZeroUsize) {
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LAYOUT_CACHE.with_borrow_mut(|c| c.resize(cache_size));
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}
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/// Set the direction of the layout.
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///
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/// # Examples
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///
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/// ```rust
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/// # use ratatui::prelude::*;
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/// let layout = Layout::default()
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/// .direction(Direction::Horizontal)
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/// .constraints([Constraint::Length(5), Constraint::Min(0)])
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/// .split(Rect::new(0, 0, 10, 10));
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/// assert_eq!(layout[..], [Rect::new(0, 0, 5, 10), Rect::new(5, 0, 5, 10)]);
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///
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/// let layout = Layout::default()
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/// .direction(Direction::Vertical)
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/// .constraints([Constraint::Length(5), Constraint::Min(0)])
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/// .split(Rect::new(0, 0, 10, 10));
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/// assert_eq!(layout[..], [Rect::new(0, 0, 10, 5), Rect::new(0, 5, 10, 5)]);
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/// ```
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#[must_use = "method moves the value of self and returns the modified value"]
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pub const fn direction(mut self, direction: Direction) -> Self {
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self.direction = direction;
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self
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}
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/// Sets the constraints of the layout.
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///
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/// The `constraints` parameter accepts any type that implements `IntoIterator<Item =
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/// Into<Constraint>>`. This includes arrays, slices, vectors, iterators. `Into<Constraint>` is
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/// implemented on u16, so you can pass an array or vec of u16 to this function to create a
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/// layout with fixed size chunks.
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///
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/// Note that the constraints are applied to the whole area that is to be split, so using
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/// percentages and ratios with the other constraints may not have the desired effect of
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/// splitting the area up. (e.g. splitting 100 into [min 20, 50%, 50%], may not result in [20,
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/// 40, 40] but rather an indeterminate result between [20, 50, 30] and [20, 30, 50]).
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///
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/// # Examples
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///
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/// ```rust
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/// # use ratatui::prelude::*;
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/// let layout = Layout::default()
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/// .constraints([
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/// Constraint::Percentage(20),
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/// Constraint::Ratio(1, 5),
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/// Constraint::Length(2),
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/// Constraint::Min(2),
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/// Constraint::Max(2),
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/// ])
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/// .split(Rect::new(0, 0, 10, 10));
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/// assert_eq!(
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/// layout[..],
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/// [
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/// Rect::new(0, 0, 10, 2),
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/// Rect::new(0, 2, 10, 2),
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/// Rect::new(0, 4, 10, 2),
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/// Rect::new(0, 6, 10, 2),
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/// Rect::new(0, 8, 10, 2),
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/// ]
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/// );
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///
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/// Layout::default().constraints([Constraint::Min(0)]);
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/// Layout::default().constraints(&[Constraint::Min(0)]);
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/// Layout::default().constraints(vec![Constraint::Min(0)]);
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/// Layout::default().constraints([Constraint::Min(0)].iter().filter(|_| true));
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/// Layout::default().constraints([1, 2, 3].iter().map(|&c| Constraint::Length(c)));
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/// Layout::default().constraints([1, 2, 3]);
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/// Layout::default().constraints(vec![1, 2, 3]);
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/// ```
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#[must_use = "method moves the value of self and returns the modified value"]
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pub fn constraints<I>(mut self, constraints: I) -> Self
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where
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I: IntoIterator,
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I::Item: Into<Constraint>,
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{
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self.constraints = constraints.into_iter().map(Into::into).collect();
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self
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}
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/// Set the margin of the layout.
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///
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/// # Examples
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///
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/// ```rust
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/// # use ratatui::prelude::*;
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/// let layout = Layout::default()
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/// .constraints([Constraint::Min(0)])
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/// .margin(2)
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/// .split(Rect::new(0, 0, 10, 10));
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/// assert_eq!(layout[..], [Rect::new(2, 2, 6, 6)]);
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/// ```
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#[must_use = "method moves the value of self and returns the modified value"]
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pub const fn margin(mut self, margin: u16) -> Self {
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self.margin = Margin {
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horizontal: margin,
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vertical: margin,
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};
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self
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}
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/// Set the horizontal margin of the layout.
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///
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/// # Examples
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///
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/// ```rust
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/// # use ratatui::prelude::*;
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/// let layout = Layout::default()
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/// .constraints([Constraint::Min(0)])
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/// .horizontal_margin(2)
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/// .split(Rect::new(0, 0, 10, 10));
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/// assert_eq!(layout[..], [Rect::new(2, 0, 6, 10)]);
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/// ```
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#[must_use = "method moves the value of self and returns the modified value"]
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pub const fn horizontal_margin(mut self, horizontal: u16) -> Self {
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self.margin.horizontal = horizontal;
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self
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}
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/// Set the vertical margin of the layout.
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///
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/// # Examples
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///
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/// ```rust
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/// # use ratatui::prelude::*;
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/// let layout = Layout::default()
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/// .constraints([Constraint::Min(0)])
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/// .vertical_margin(2)
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/// .split(Rect::new(0, 0, 10, 10));
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/// assert_eq!(layout[..], [Rect::new(0, 2, 10, 6)]);
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/// ```
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#[must_use = "method moves the value of self and returns the modified value"]
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pub const fn vertical_margin(mut self, vertical: u16) -> Self {
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self.margin.vertical = vertical;
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self
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}
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/// The `flex` method allows you to specify the flex behavior of the layout.
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///
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/// # Arguments
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///
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/// * `flex`: A [`Flex`] enum value that represents the flex behavior of the layout. It can be
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/// one of the following:
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/// - [`Flex::Legacy`]: The last item is stretched to fill the excess space.
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/// - [`Flex::Start`]: The items are aligned to the start of the layout.
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/// - [`Flex::Center`]: The items are aligned to the center of the layout.
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/// - [`Flex::End`]: The items are aligned to the end of the layout.
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/// - [`Flex::SpaceAround`]: The items are evenly distributed with equal space around them.
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/// - [`Flex::SpaceBetween`]: The items are evenly distributed with equal space between them.
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///
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/// # Examples
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///
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/// In this example, the items in the layout will be aligned to the start.
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///
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/// ```rust
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/// # use ratatui::layout::{Flex, Layout, Constraint::*};
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/// let layout = Layout::horizontal([Length(20), Length(20), Length(20)]).flex(Flex::Start);
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/// ```
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///
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/// In this example, the items in the layout will be stretched equally to fill the available
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/// space.
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///
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/// ```rust
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/// # use ratatui::layout::{Flex, Layout, Constraint::*};
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/// let layout = Layout::horizontal([Length(20), Length(20), Length(20)]).flex(Flex::Legacy);
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/// ```
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#[must_use = "method moves the value of self and returns the modified value"]
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pub const fn flex(mut self, flex: Flex) -> Self {
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self.flex = flex;
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self
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}
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/// Sets the spacing between items in the layout.
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///
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/// The `spacing` method sets the spacing between items in the layout. The spacing is applied
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/// evenly between all items. The spacing value represents the number of cells between each
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/// item.
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///
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/// # Examples
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///
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/// In this example, the spacing between each item in the layout is set to 2 cells.
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///
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/// ```rust
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/// # use ratatui::layout::{Layout, Constraint::*};
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/// let layout = Layout::horizontal([Length(20), Length(20), Length(20)]).spacing(2);
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/// ```
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///
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/// # Notes
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///
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/// - If the layout has only one item, the spacing will not be applied.
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/// - Spacing will not be applied for [`Flex::SpaceAround`] and [`Flex::SpaceBetween`]
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#[must_use = "method moves the value of self and returns the modified value"]
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pub const fn spacing(mut self, spacing: u16) -> Self {
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self.spacing = spacing;
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self
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}
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|
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/// Split the rect into a number of sub-rects according to the given [`Layout`].
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///
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/// An ergonomic wrapper around [`Layout::split`] that returns an array of `Rect`s instead of
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/// `Rc<[Rect]>`.
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///
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/// This method requires the number of constraints to be known at compile time. If you don't
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/// know the number of constraints at compile time, use [`Layout::split`] instead.
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///
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/// # Panics
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///
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/// Panics if the number of constraints is not equal to the length of the returned array.
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///
|
|
/// # Examples
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|
///
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|
/// ```rust
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/// # use ratatui::prelude::*;
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/// # fn render(frame: &mut Frame) {
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/// let area = frame.size();
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/// let layout = Layout::vertical([Constraint::Length(1), Constraint::Min(0)]);
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/// let [top, main] = layout.areas(area);
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///
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/// // or explicitly specify the number of constraints:
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/// let areas = layout.areas::<2>(area);
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/// # }
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pub fn areas<const N: usize>(&self, area: Rect) -> [Rect; N] {
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let (areas, _) = self.split_with_spacers(area);
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areas.as_ref().try_into().expect("invalid number of rects")
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}
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|
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/// Split the rect into a number of sub-rects according to the given [`Layout`] and return just
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/// the spacers between the areas.
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///
|
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/// This method requires the number of constraints to be known at compile time. If you don't
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|
/// know the number of constraints at compile time, use [`Layout::split_with_spacers`] instead.
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///
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/// This method is similar to [`Layout::areas`], and can be called with the same parameters, but
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/// it returns just the spacers between the areas. The result of calling the `areas` method is
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/// cached, so this will generally not re-run the solver, but will just return the cached
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/// result.
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///
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/// # Panics
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///
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/// Panics if the number of constraints + 1 is not equal to the length of the returned array.
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///
|
|
/// # Examples
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|
///
|
|
/// ```rust
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|
/// # use ratatui::prelude::*;
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|
/// # fn render(frame: &mut Frame) {
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/// let area = frame.size();
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/// let layout = Layout::vertical([Constraint::Length(1), Constraint::Min(0)]);
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/// let [top, main] = layout.areas(area);
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|
/// let [before, inbetween, after] = layout.spacers(area);
|
|
///
|
|
/// // or explicitly specify the number of constraints:
|
|
/// let spacers = layout.spacers::<2>(area);
|
|
/// # }
|
|
pub fn spacers<const N: usize>(&self, area: Rect) -> [Rect; N] {
|
|
let (_, spacers) = self.split_with_spacers(area);
|
|
spacers
|
|
.as_ref()
|
|
.try_into()
|
|
.expect("invalid number of rects")
|
|
}
|
|
|
|
/// Wrapper function around the cassowary-rs solver to be able to split a given area into
|
|
/// smaller ones based on the preferred widths or heights and the direction.
|
|
///
|
|
/// Note that the constraints are applied to the whole area that is to be split, so using
|
|
/// percentages and ratios with the other constraints may not have the desired effect of
|
|
/// splitting the area up. (e.g. splitting 100 into [min 20, 50%, 50%], may not result in [20,
|
|
/// 40, 40] but rather an indeterminate result between [20, 50, 30] and [20, 30, 50]).
|
|
///
|
|
/// This method stores the result of the computation in a thread-local cache keyed on the layout
|
|
/// and area, so that subsequent calls with the same parameters are faster. The cache is a
|
|
/// `LruCache`, and grows until [`Self::DEFAULT_CACHE_SIZE`] is reached by default, if the cache
|
|
/// is initialized with the [`Layout::init_cache()`] grows until the initialized cache size.
|
|
///
|
|
/// There is a helper method that can be used to split the whole area into smaller ones based on
|
|
/// the layout: [`Layout::areas()`]. That method is a shortcut for calling this method. It
|
|
/// allows you to destructure the result directly into variables, which is useful when you know
|
|
/// at compile time the number of areas that will be created.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// ```
|
|
/// # use ratatui::prelude::*;
|
|
/// let layout = Layout::default()
|
|
/// .direction(Direction::Vertical)
|
|
/// .constraints([Constraint::Length(5), Constraint::Min(0)])
|
|
/// .split(Rect::new(2, 2, 10, 10));
|
|
/// assert_eq!(layout[..], [Rect::new(2, 2, 10, 5), Rect::new(2, 7, 10, 5)]);
|
|
///
|
|
/// let layout = Layout::default()
|
|
/// .direction(Direction::Horizontal)
|
|
/// .constraints([Constraint::Ratio(1, 3), Constraint::Ratio(2, 3)])
|
|
/// .split(Rect::new(0, 0, 9, 2));
|
|
/// assert_eq!(layout[..], [Rect::new(0, 0, 3, 2), Rect::new(3, 0, 6, 2)]);
|
|
/// ```
|
|
pub fn split(&self, area: Rect) -> Rects {
|
|
self.split_with_spacers(area).0
|
|
}
|
|
|
|
/// Wrapper function around the cassowary-r solver that splits the given area into smaller ones
|
|
/// based on the preferred widths or heights and the direction, with the ability to include
|
|
/// spacers between the areas.
|
|
///
|
|
/// This method is similar to `split`, but it returns two sets of rectangles: one for the areas
|
|
/// and one for the spacers.
|
|
///
|
|
/// This method stores the result of the computation in a thread-local cache keyed on the layout
|
|
/// and area, so that subsequent calls with the same parameters are faster. The cache is a
|
|
/// `LruCache`, and grows until [`Self::DEFAULT_CACHE_SIZE`] is reached by default, if the cache
|
|
/// is initialized with the [`Layout::init_cache()`] grows until the initialized cache size.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// ```
|
|
/// # use ratatui::prelude::*;
|
|
/// let (areas, spacers) = Layout::default()
|
|
/// .direction(Direction::Vertical)
|
|
/// .constraints([Constraint::Length(5), Constraint::Min(0)])
|
|
/// .split_with_spacers(Rect::new(2, 2, 10, 10));
|
|
/// assert_eq!(areas[..], [Rect::new(2, 2, 10, 5), Rect::new(2, 7, 10, 5)]);
|
|
/// assert_eq!(
|
|
/// spacers[..],
|
|
/// [
|
|
/// Rect::new(2, 2, 10, 0),
|
|
/// Rect::new(2, 7, 10, 0),
|
|
/// Rect::new(2, 12, 10, 0)
|
|
/// ]
|
|
/// );
|
|
///
|
|
/// let (areas, spacers) = Layout::default()
|
|
/// .direction(Direction::Horizontal)
|
|
/// .spacing(1)
|
|
/// .constraints([Constraint::Ratio(1, 3), Constraint::Ratio(2, 3)])
|
|
/// .split_with_spacers(Rect::new(0, 0, 10, 2));
|
|
/// assert_eq!(areas[..], [Rect::new(0, 0, 3, 2), Rect::new(4, 0, 6, 2)]);
|
|
/// assert_eq!(
|
|
/// spacers[..],
|
|
/// [
|
|
/// Rect::new(0, 0, 0, 2),
|
|
/// Rect::new(3, 0, 1, 2),
|
|
/// Rect::new(10, 0, 0, 2)
|
|
/// ]
|
|
/// );
|
|
/// ```
|
|
pub fn split_with_spacers(&self, area: Rect) -> (Segments, Spacers) {
|
|
LAYOUT_CACHE.with_borrow_mut(|c| {
|
|
let key = (area, self.clone());
|
|
c.get_or_insert(key, || self.try_split(area).expect("failed to split"))
|
|
.clone()
|
|
})
|
|
}
|
|
|
|
fn try_split(&self, area: Rect) -> Result<(Segments, Spacers), AddConstraintError> {
|
|
// To take advantage of all of cassowary features, we would want to store the `Solver` in
|
|
// one of the fields of the Layout struct. And we would want to set it up such that we could
|
|
// add or remove constraints as and when needed.
|
|
// The advantage of doing it as described above is that it would allow users to
|
|
// incrementally add and remove constraints efficiently.
|
|
// Solves will just one constraint different would not need to resolve the entire layout.
|
|
//
|
|
// The disadvantage of this approach is that it requires tracking which constraints were
|
|
// added, and which variables they correspond to.
|
|
// This will also require introducing and maintaining the API for users to do so.
|
|
//
|
|
// Currently we don't support that use case and do not intend to support it in the future,
|
|
// and instead we require that the user re-solve the layout every time they call `split`.
|
|
// To minimize the time it takes to solve the same problem over and over again, we
|
|
// cache the `Layout` struct along with the results.
|
|
//
|
|
// `try_split` is the inner method in `split` that is called only when the LRU cache doesn't
|
|
// match the key. So inside `try_split`, we create a new instance of the solver.
|
|
//
|
|
// This is equivalent to storing the solver in `Layout` and calling `solver.reset()` here.
|
|
let mut solver = Solver::new();
|
|
|
|
let inner_area = area.inner(self.margin);
|
|
let (area_start, area_end) = match self.direction {
|
|
Direction::Horizontal => (
|
|
f64::from(inner_area.x) * FLOAT_PRECISION_MULTIPLIER,
|
|
f64::from(inner_area.right()) * FLOAT_PRECISION_MULTIPLIER,
|
|
),
|
|
Direction::Vertical => (
|
|
f64::from(inner_area.y) * FLOAT_PRECISION_MULTIPLIER,
|
|
f64::from(inner_area.bottom()) * FLOAT_PRECISION_MULTIPLIER,
|
|
),
|
|
};
|
|
|
|
// ```plain
|
|
// <───────────────────────────────────area_width─────────────────────────────────>
|
|
// ┌─area_start area_end─┐
|
|
// V V
|
|
// ┌────┬───────────────────┬────┬─────variables─────┬────┬───────────────────┬────┐
|
|
// │ │ │ │ │ │ │ │
|
|
// V V V V V V V V
|
|
// ┌ ┐┌──────────────────┐┌ ┐┌──────────────────┐┌ ┐┌──────────────────┐┌ ┐
|
|
// │ Max(20) │ │ Max(20) │ │ Max(20) │
|
|
// └ ┘└──────────────────┘└ ┘└──────────────────┘└ ┘└──────────────────┘└ ┘
|
|
// ^ ^ ^ ^ ^ ^ ^ ^
|
|
// │ │ │ │ │ │ │ │
|
|
// └─┬──┶━━━━━━━━━┳━━━━━━━━━┵─┬──┶━━━━━━━━━┳━━━━━━━━━┵─┬──┶━━━━━━━━━┳━━━━━━━━━┵─┬──┘
|
|
// │ ┃ │ ┃ │ ┃ │
|
|
// └────────────╂───────────┴────────────╂───────────┴────────────╂──Spacers──┘
|
|
// ┃ ┃ ┃
|
|
// ┗━━━━━━━━━━━━━━━━━━━━━━━━┻━━━━━━━━Segments━━━━━━━━┛
|
|
// ```
|
|
|
|
let variable_count = self.constraints.len() * 2 + 2;
|
|
let variables = iter::repeat_with(Variable::new)
|
|
.take(variable_count)
|
|
.collect_vec();
|
|
let spacers = variables
|
|
.iter()
|
|
.tuples()
|
|
.map(|(a, b)| Element::from((*a, *b)))
|
|
.collect_vec();
|
|
let segments = variables
|
|
.iter()
|
|
.skip(1)
|
|
.tuples()
|
|
.map(|(a, b)| Element::from((*a, *b)))
|
|
.collect_vec();
|
|
|
|
let flex = self.flex;
|
|
let spacing = self.spacing;
|
|
let constraints = &self.constraints;
|
|
|
|
let area_size = Element::from((*variables.first().unwrap(), *variables.last().unwrap()));
|
|
configure_area(&mut solver, area_size, area_start, area_end)?;
|
|
configure_variable_constraints(&mut solver, &variables, area_size)?;
|
|
configure_flex_constraints(&mut solver, area_size, &spacers, flex, spacing)?;
|
|
configure_constraints(&mut solver, area_size, &segments, constraints, flex)?;
|
|
configure_fill_constraints(&mut solver, &segments, constraints, flex)?;
|
|
|
|
if !flex.is_legacy() {
|
|
for (left, right) in segments.iter().tuple_windows() {
|
|
solver.add_constraint(left.has_size(right, ALL_SEGMENT_GROW))?;
|
|
}
|
|
}
|
|
|
|
// `solver.fetch_changes()` can only be called once per solve
|
|
let changes: HashMap<Variable, f64> = solver.fetch_changes().iter().copied().collect();
|
|
// debug_segments(&segments, &changes);
|
|
|
|
let segment_rects = changes_to_rects(&changes, &segments, inner_area, self.direction);
|
|
let spacer_rects = changes_to_rects(&changes, &spacers, inner_area, self.direction);
|
|
|
|
Ok((segment_rects, spacer_rects))
|
|
}
|
|
}
|
|
|
|
fn configure_area(
|
|
solver: &mut Solver,
|
|
area: Element,
|
|
area_start: f64,
|
|
area_end: f64,
|
|
) -> Result<(), AddConstraintError> {
|
|
solver.add_constraint(area.start | EQ(REQUIRED) | area_start)?;
|
|
solver.add_constraint(area.end | EQ(REQUIRED) | area_end)?;
|
|
Ok(())
|
|
}
|
|
|
|
fn configure_variable_constraints(
|
|
solver: &mut Solver,
|
|
variables: &[Variable],
|
|
area: Element,
|
|
) -> Result<(), AddConstraintError> {
|
|
// all variables are in the range [area.start, area.end]
|
|
for &variable in variables {
|
|
solver.add_constraint(variable | GE(REQUIRED) | area.start)?;
|
|
solver.add_constraint(variable | LE(REQUIRED) | area.end)?;
|
|
}
|
|
|
|
// all variables are in ascending order
|
|
for (&left, &right) in variables.iter().tuple_windows() {
|
|
solver.add_constraint(left | LE(REQUIRED) | right)?;
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn configure_constraints(
|
|
solver: &mut Solver,
|
|
area: Element,
|
|
segments: &[Element],
|
|
constraints: &[Constraint],
|
|
flex: Flex,
|
|
) -> Result<(), AddConstraintError> {
|
|
for (&constraint, &element) in constraints.iter().zip(segments.iter()) {
|
|
match constraint {
|
|
Constraint::Max(max) => {
|
|
solver.add_constraint(element.has_max_size(max, MAX_SIZE_LE))?;
|
|
solver.add_constraint(element.has_int_size(max, MAX_SIZE_EQ))?;
|
|
}
|
|
Constraint::Min(min) => {
|
|
solver.add_constraint(element.has_min_size(min, MIN_SIZE_GE))?;
|
|
if flex.is_legacy() {
|
|
solver.add_constraint(element.has_int_size(min, MIN_SIZE_EQ))?;
|
|
} else {
|
|
solver.add_constraint(element.has_size(area, FILL_GROW))?;
|
|
}
|
|
}
|
|
Constraint::Length(length) => {
|
|
solver.add_constraint(element.has_int_size(length, LENGTH_SIZE_EQ))?;
|
|
}
|
|
Constraint::Percentage(p) => {
|
|
let size = area.size() * f64::from(p) / 100.00;
|
|
solver.add_constraint(element.has_size(size, PERCENTAGE_SIZE_EQ))?;
|
|
}
|
|
Constraint::Ratio(num, den) => {
|
|
// avoid division by zero by using 1 when denominator is 0
|
|
let size = area.size() * f64::from(num) / f64::from(den.max(1));
|
|
solver.add_constraint(element.has_size(size, RATIO_SIZE_EQ))?;
|
|
}
|
|
Constraint::Fill(_) => {
|
|
// given no other constraints, this segment will grow as much as possible.
|
|
solver.add_constraint(element.has_size(area, FILL_GROW))?;
|
|
}
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn configure_flex_constraints(
|
|
solver: &mut Solver,
|
|
area: Element,
|
|
spacers: &[Element],
|
|
flex: Flex,
|
|
spacing: u16,
|
|
) -> Result<(), AddConstraintError> {
|
|
let spacers_except_first_and_last = spacers.get(1..spacers.len() - 1).unwrap_or(&[]);
|
|
let spacing_f64 = f64::from(spacing) * FLOAT_PRECISION_MULTIPLIER;
|
|
match flex {
|
|
Flex::Legacy => {
|
|
for spacer in spacers_except_first_and_last {
|
|
solver.add_constraint(spacer.has_size(spacing_f64, SPACER_SIZE_EQ))?;
|
|
}
|
|
if let (Some(first), Some(last)) = (spacers.first(), spacers.last()) {
|
|
solver.add_constraint(first.is_empty())?;
|
|
solver.add_constraint(last.is_empty())?;
|
|
}
|
|
}
|
|
// all spacers are the same size and will grow to fill any remaining space after the
|
|
// constraints are satisfied
|
|
Flex::SpaceAround => {
|
|
for (left, right) in spacers.iter().tuple_combinations() {
|
|
solver.add_constraint(left.has_size(right, SPACER_SIZE_EQ))?;
|
|
}
|
|
for spacer in spacers {
|
|
solver.add_constraint(spacer.has_min_size(spacing, SPACER_SIZE_EQ))?;
|
|
solver.add_constraint(spacer.has_size(area, SPACE_GROW))?;
|
|
}
|
|
}
|
|
|
|
// all spacers are the same size and will grow to fill any remaining space after the
|
|
// constraints are satisfied, but the first and last spacers are zero size
|
|
Flex::SpaceBetween => {
|
|
for (left, right) in spacers_except_first_and_last.iter().tuple_combinations() {
|
|
solver.add_constraint(left.has_size(right.size(), SPACER_SIZE_EQ))?;
|
|
}
|
|
for spacer in spacers_except_first_and_last {
|
|
solver.add_constraint(spacer.has_min_size(spacing, SPACER_SIZE_EQ))?;
|
|
}
|
|
for spacer in spacers_except_first_and_last {
|
|
solver.add_constraint(spacer.has_size(area, SPACE_GROW))?;
|
|
}
|
|
if let (Some(first), Some(last)) = (spacers.first(), spacers.last()) {
|
|
solver.add_constraint(first.is_empty())?;
|
|
solver.add_constraint(last.is_empty())?;
|
|
}
|
|
}
|
|
Flex::Start => {
|
|
for spacer in spacers_except_first_and_last {
|
|
solver.add_constraint(spacer.has_size(spacing_f64, SPACER_SIZE_EQ))?;
|
|
}
|
|
if let (Some(first), Some(last)) = (spacers.first(), spacers.last()) {
|
|
solver.add_constraint(first.is_empty())?;
|
|
solver.add_constraint(last.has_size(area, GROW))?;
|
|
}
|
|
}
|
|
Flex::Center => {
|
|
for spacer in spacers_except_first_and_last {
|
|
solver.add_constraint(spacer.has_size(spacing_f64, SPACER_SIZE_EQ))?;
|
|
}
|
|
if let (Some(first), Some(last)) = (spacers.first(), spacers.last()) {
|
|
solver.add_constraint(first.has_size(area, GROW))?;
|
|
solver.add_constraint(last.has_size(area, GROW))?;
|
|
solver.add_constraint(first.has_size(last, SPACER_SIZE_EQ))?;
|
|
}
|
|
}
|
|
Flex::End => {
|
|
for spacer in spacers_except_first_and_last {
|
|
solver.add_constraint(spacer.has_size(spacing_f64, SPACER_SIZE_EQ))?;
|
|
}
|
|
if let (Some(first), Some(last)) = (spacers.first(), spacers.last()) {
|
|
solver.add_constraint(last.is_empty())?;
|
|
solver.add_constraint(first.has_size(area, GROW))?;
|
|
}
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
/// Make every `Fill` constraint proportionally equal to each other
|
|
/// This will make it fill up empty spaces equally
|
|
///
|
|
/// [Fill(1), Fill(1)]
|
|
/// ┌──────┐┌──────┐
|
|
/// │abcdef││abcdef│
|
|
/// └──────┘└──────┘
|
|
///
|
|
/// [Min(0), Fill(2)]
|
|
/// ┌──────┐┌────────────┐
|
|
/// │abcdef││abcdefabcdef│
|
|
/// └──────┘└────────────┘
|
|
///
|
|
/// `size == base_element * scaling_factor`
|
|
fn configure_fill_constraints(
|
|
solver: &mut Solver,
|
|
segments: &[Element],
|
|
constraints: &[Constraint],
|
|
flex: Flex,
|
|
) -> Result<(), AddConstraintError> {
|
|
for ((&left_constraint, &left_element), (&right_constraint, &right_element)) in constraints
|
|
.iter()
|
|
.zip(segments.iter())
|
|
.filter(|(c, _)| c.is_fill() || (!flex.is_legacy() && c.is_min()))
|
|
.tuple_combinations()
|
|
{
|
|
let left_scaling_factor = match left_constraint {
|
|
Constraint::Fill(scale) => f64::from(scale).max(1e-6),
|
|
Constraint::Min(_) => 1.0,
|
|
_ => unreachable!(),
|
|
};
|
|
let right_scaling_factor = match right_constraint {
|
|
Constraint::Fill(scale) => f64::from(scale).max(1e-6),
|
|
Constraint::Min(_) => 1.0,
|
|
_ => unreachable!(),
|
|
};
|
|
solver.add_constraint(
|
|
(right_scaling_factor * left_element.size())
|
|
| EQ(GROW)
|
|
| (left_scaling_factor * right_element.size()),
|
|
)?;
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn changes_to_rects(
|
|
changes: &HashMap<Variable, f64>,
|
|
elements: &[Element],
|
|
area: Rect,
|
|
direction: Direction,
|
|
) -> Rects {
|
|
// convert to Rects
|
|
elements
|
|
.iter()
|
|
.map(|element| {
|
|
let start = changes.get(&element.start).unwrap_or(&0.0);
|
|
let end = changes.get(&element.end).unwrap_or(&0.0);
|
|
let start = (start.round() / FLOAT_PRECISION_MULTIPLIER).round() as u16;
|
|
let end = (end.round() / FLOAT_PRECISION_MULTIPLIER).round() as u16;
|
|
let size = end.saturating_sub(start);
|
|
match direction {
|
|
Direction::Horizontal => Rect {
|
|
x: start,
|
|
y: area.y,
|
|
width: size,
|
|
height: area.height,
|
|
},
|
|
Direction::Vertical => Rect {
|
|
x: area.x,
|
|
y: start,
|
|
width: area.width,
|
|
height: size,
|
|
},
|
|
}
|
|
})
|
|
.collect::<Rects>()
|
|
}
|
|
|
|
/// please leave this here as it's useful for debugging unit tests when we make any changes to
|
|
/// layout code - we should replace this with tracing in the future.
|
|
#[allow(dead_code)]
|
|
fn debug_segments(segments: &[Element], changes: &HashMap<Variable, f64>) {
|
|
let ends = format!(
|
|
"{:?}",
|
|
segments
|
|
.iter()
|
|
.map(|e| changes.get(&e.end).unwrap_or(&0.0))
|
|
.collect::<Vec<&f64>>()
|
|
);
|
|
dbg!(ends);
|
|
}
|
|
|
|
/// A container used by the solver inside split
|
|
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
|
|
struct Element {
|
|
start: Variable,
|
|
end: Variable,
|
|
}
|
|
|
|
impl From<(Variable, Variable)> for Element {
|
|
fn from((start, end): (Variable, Variable)) -> Self {
|
|
Self { start, end }
|
|
}
|
|
}
|
|
|
|
impl Element {
|
|
#[allow(dead_code)]
|
|
fn new() -> Self {
|
|
Self {
|
|
start: Variable::new(),
|
|
end: Variable::new(),
|
|
}
|
|
}
|
|
|
|
fn size(&self) -> Expression {
|
|
self.end - self.start
|
|
}
|
|
|
|
fn has_max_size(&self, size: u16, strength: f64) -> cassowary::Constraint {
|
|
self.size() | LE(strength) | (f64::from(size) * FLOAT_PRECISION_MULTIPLIER)
|
|
}
|
|
|
|
fn has_min_size(&self, size: u16, strength: f64) -> cassowary::Constraint {
|
|
self.size() | GE(strength) | (f64::from(size) * FLOAT_PRECISION_MULTIPLIER)
|
|
}
|
|
|
|
fn has_int_size(&self, size: u16, strength: f64) -> cassowary::Constraint {
|
|
self.size() | EQ(strength) | (f64::from(size) * FLOAT_PRECISION_MULTIPLIER)
|
|
}
|
|
|
|
fn has_size<E: Into<Expression>>(&self, size: E, strength: f64) -> cassowary::Constraint {
|
|
self.size() | EQ(strength) | size.into()
|
|
}
|
|
|
|
fn is_empty(&self) -> cassowary::Constraint {
|
|
self.size() | EQ(REQUIRED - 1.0) | 0.0
|
|
}
|
|
}
|
|
|
|
/// allow the element to represent its own size in expressions
|
|
impl From<Element> for Expression {
|
|
fn from(element: Element) -> Self {
|
|
element.size()
|
|
}
|
|
}
|
|
|
|
/// allow the element to represent its own size in expressions
|
|
impl From<&Element> for Expression {
|
|
fn from(element: &Element) -> Self {
|
|
element.size()
|
|
}
|
|
}
|
|
|
|
mod strengths {
|
|
use cassowary::strength::{MEDIUM, REQUIRED, STRONG, WEAK};
|
|
/// The strength to apply to Spacers to ensure that their sizes are equal.
|
|
///
|
|
/// ┌ ┐┌───┐┌ ┐┌───┐┌ ┐
|
|
/// ==x │ │ ==x │ │ ==x
|
|
/// └ ┘└───┘└ ┘└───┘└ ┘
|
|
pub const SPACER_SIZE_EQ: f64 = REQUIRED - 1.0;
|
|
|
|
/// The strength to apply to Min inequality constraints.
|
|
///
|
|
/// ┌────────┐
|
|
/// │Min(>=x)│
|
|
/// └────────┘
|
|
pub const MIN_SIZE_GE: f64 = STRONG * 100.0;
|
|
|
|
/// The strength to apply to Max inequality constraints.
|
|
///
|
|
/// ┌────────┐
|
|
/// │Max(<=x)│
|
|
/// └────────┘
|
|
pub const MAX_SIZE_LE: f64 = STRONG * 100.0;
|
|
|
|
/// The strength to apply to Length constraints.
|
|
///
|
|
/// ┌───────────┐
|
|
/// │Length(==x)│
|
|
/// └───────────┘
|
|
pub const LENGTH_SIZE_EQ: f64 = STRONG * 10.0;
|
|
|
|
/// The strength to apply to Percentage constraints.
|
|
///
|
|
/// ┌───────────────┐
|
|
/// │Percentage(==x)│
|
|
/// └───────────────┘
|
|
pub const PERCENTAGE_SIZE_EQ: f64 = STRONG;
|
|
|
|
/// The strength to apply to Ratio constraints.
|
|
///
|
|
/// ┌────────────┐
|
|
/// │Ratio(==x,y)│
|
|
/// └────────────┘
|
|
pub const RATIO_SIZE_EQ: f64 = STRONG / 10.0;
|
|
|
|
/// The strength to apply to Min equality constraints.
|
|
///
|
|
/// ┌────────┐
|
|
/// │Min(==x)│
|
|
/// └────────┘
|
|
pub const MIN_SIZE_EQ: f64 = MEDIUM * 10.0;
|
|
|
|
/// The strength to apply to Max equality constraints.
|
|
///
|
|
/// ┌────────┐
|
|
/// │Max(==x)│
|
|
/// └────────┘
|
|
pub const MAX_SIZE_EQ: f64 = MEDIUM * 10.0;
|
|
|
|
/// The strength to apply to Fill growing constraints.
|
|
///
|
|
/// ┌─────────────────────┐
|
|
/// │<= Fill(x) =>│
|
|
/// └─────────────────────┘
|
|
pub const FILL_GROW: f64 = MEDIUM;
|
|
|
|
/// The strength to apply to growing constraints.
|
|
///
|
|
/// ┌────────────┐
|
|
/// │<= Min(x) =>│
|
|
/// └────────────┘
|
|
pub const GROW: f64 = MEDIUM / 10.0;
|
|
|
|
/// The strength to apply to Spacer growing constraints.
|
|
///
|
|
/// ┌ ┐
|
|
/// <= x =>
|
|
/// └ ┘
|
|
pub const SPACE_GROW: f64 = WEAK * 10.0;
|
|
|
|
/// The strength to apply to growing the size of all segments equally.
|
|
///
|
|
/// ┌───────┐
|
|
/// │<= x =>│
|
|
/// └───────┘
|
|
pub const ALL_SEGMENT_GROW: f64 = WEAK;
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
// The compiler will optimize out the comparisons, but this ensures that the constants are
|
|
// defined in the correct order of priority.
|
|
#[allow(clippy::assertions_on_constants)]
|
|
pub fn strength_is_valid() {
|
|
use strengths::*;
|
|
assert!(SPACER_SIZE_EQ > MAX_SIZE_LE);
|
|
assert!(MAX_SIZE_LE > MAX_SIZE_EQ);
|
|
assert!(MIN_SIZE_GE == MAX_SIZE_LE);
|
|
assert!(MAX_SIZE_LE > LENGTH_SIZE_EQ);
|
|
assert!(LENGTH_SIZE_EQ > PERCENTAGE_SIZE_EQ);
|
|
assert!(PERCENTAGE_SIZE_EQ > RATIO_SIZE_EQ);
|
|
assert!(RATIO_SIZE_EQ > MAX_SIZE_EQ);
|
|
assert!(MIN_SIZE_GE > FILL_GROW);
|
|
assert!(FILL_GROW > GROW);
|
|
assert!(GROW > SPACE_GROW);
|
|
assert!(SPACE_GROW > ALL_SEGMENT_GROW);
|
|
}
|
|
|
|
#[test]
|
|
fn cache_size() {
|
|
LAYOUT_CACHE.with_borrow(|c| {
|
|
assert_eq!(c.cap().get(), Layout::DEFAULT_CACHE_SIZE);
|
|
});
|
|
|
|
Layout::init_cache(NonZeroUsize::new(10).unwrap());
|
|
LAYOUT_CACHE.with_borrow(|c| {
|
|
assert_eq!(c.cap().get(), 10);
|
|
});
|
|
}
|
|
|
|
#[test]
|
|
fn default() {
|
|
assert_eq!(
|
|
Layout::default(),
|
|
Layout {
|
|
direction: Direction::Vertical,
|
|
margin: Margin::new(0, 0),
|
|
constraints: vec![],
|
|
flex: Flex::default(),
|
|
spacing: 0,
|
|
}
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn new() {
|
|
// array
|
|
let fixed_size_array = [Constraint::Min(0)];
|
|
let layout = Layout::new(Direction::Horizontal, fixed_size_array);
|
|
assert_eq!(layout.direction, Direction::Horizontal);
|
|
assert_eq!(layout.constraints, [Constraint::Min(0)]);
|
|
|
|
// array_ref
|
|
#[allow(clippy::needless_borrows_for_generic_args)] // backwards compatibility test
|
|
let layout = Layout::new(Direction::Horizontal, &[Constraint::Min(0)]);
|
|
assert_eq!(layout.direction, Direction::Horizontal);
|
|
assert_eq!(layout.constraints, [Constraint::Min(0)]);
|
|
|
|
// vec
|
|
let layout = Layout::new(Direction::Horizontal, vec![Constraint::Min(0)]);
|
|
assert_eq!(layout.direction, Direction::Horizontal);
|
|
assert_eq!(layout.constraints, [Constraint::Min(0)]);
|
|
|
|
// vec_ref
|
|
#[allow(clippy::needless_borrows_for_generic_args)] // backwards compatibility test
|
|
let layout = Layout::new(Direction::Horizontal, &(vec![Constraint::Min(0)]));
|
|
assert_eq!(layout.direction, Direction::Horizontal);
|
|
assert_eq!(layout.constraints, [Constraint::Min(0)]);
|
|
|
|
// iterator
|
|
let layout = Layout::new(Direction::Horizontal, iter::once(Constraint::Min(0)));
|
|
assert_eq!(layout.direction, Direction::Horizontal);
|
|
assert_eq!(layout.constraints, [Constraint::Min(0)]);
|
|
}
|
|
|
|
#[test]
|
|
fn vertical() {
|
|
assert_eq!(
|
|
Layout::vertical([Constraint::Min(0)]),
|
|
Layout {
|
|
direction: Direction::Vertical,
|
|
margin: Margin::new(0, 0),
|
|
constraints: vec![Constraint::Min(0)],
|
|
flex: Flex::default(),
|
|
spacing: 0,
|
|
}
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn horizontal() {
|
|
assert_eq!(
|
|
Layout::horizontal([Constraint::Min(0)]),
|
|
Layout {
|
|
direction: Direction::Horizontal,
|
|
margin: Margin::new(0, 0),
|
|
constraints: vec![Constraint::Min(0)],
|
|
flex: Flex::default(),
|
|
spacing: 0,
|
|
}
|
|
);
|
|
}
|
|
|
|
/// The purpose of this test is to ensure that layout can be constructed with any type that
|
|
/// implements `IntoIterator<Item = AsRef<Constraint>>`.
|
|
#[test]
|
|
#[allow(
|
|
clippy::needless_borrow,
|
|
clippy::unnecessary_to_owned,
|
|
clippy::useless_asref
|
|
)]
|
|
fn constraints() {
|
|
const CONSTRAINTS: [Constraint; 2] = [Constraint::Min(0), Constraint::Max(10)];
|
|
let fixed_size_array = CONSTRAINTS;
|
|
assert_eq!(
|
|
Layout::default().constraints(fixed_size_array).constraints,
|
|
CONSTRAINTS,
|
|
"constraints should be settable with an array"
|
|
);
|
|
|
|
let slice_of_fixed_size_array = &CONSTRAINTS;
|
|
assert_eq!(
|
|
Layout::default()
|
|
.constraints(slice_of_fixed_size_array)
|
|
.constraints,
|
|
CONSTRAINTS,
|
|
"constraints should be settable with a slice"
|
|
);
|
|
|
|
let vec = CONSTRAINTS.to_vec();
|
|
let slice_of_vec = vec.as_slice();
|
|
assert_eq!(
|
|
Layout::default().constraints(slice_of_vec).constraints,
|
|
CONSTRAINTS,
|
|
"constraints should be settable with a slice"
|
|
);
|
|
|
|
assert_eq!(
|
|
Layout::default().constraints(vec).constraints,
|
|
CONSTRAINTS,
|
|
"constraints should be settable with a Vec"
|
|
);
|
|
|
|
let iter = CONSTRAINTS.iter();
|
|
assert_eq!(
|
|
Layout::default().constraints(iter).constraints,
|
|
CONSTRAINTS,
|
|
"constraints should be settable with an iter"
|
|
);
|
|
|
|
let iterator = CONSTRAINTS.iter().map(ToOwned::to_owned);
|
|
assert_eq!(
|
|
Layout::default().constraints(iterator).constraints,
|
|
CONSTRAINTS,
|
|
"constraints should be settable with an iterator"
|
|
);
|
|
|
|
let iterator_ref = CONSTRAINTS.iter().map(AsRef::as_ref);
|
|
assert_eq!(
|
|
Layout::default().constraints(iterator_ref).constraints,
|
|
CONSTRAINTS,
|
|
"constraints should be settable with an iterator of refs"
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn direction() {
|
|
assert_eq!(
|
|
Layout::default().direction(Direction::Horizontal).direction,
|
|
Direction::Horizontal
|
|
);
|
|
assert_eq!(
|
|
Layout::default().direction(Direction::Vertical).direction,
|
|
Direction::Vertical
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn margins() {
|
|
assert_eq!(Layout::default().margin(10).margin, Margin::new(10, 10));
|
|
assert_eq!(
|
|
Layout::default().horizontal_margin(10).margin,
|
|
Margin::new(10, 0)
|
|
);
|
|
assert_eq!(
|
|
Layout::default().vertical_margin(10).margin,
|
|
Margin::new(0, 10)
|
|
);
|
|
assert_eq!(
|
|
Layout::default()
|
|
.horizontal_margin(10)
|
|
.vertical_margin(20)
|
|
.margin,
|
|
Margin::new(10, 20)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn flex() {
|
|
assert_eq!(Layout::default().flex, Flex::Start);
|
|
assert_eq!(Layout::default().flex(Flex::Center).flex, Flex::Center);
|
|
}
|
|
|
|
#[test]
|
|
fn spacing() {
|
|
assert_eq!(Layout::default().spacing(10).spacing, 10);
|
|
assert_eq!(Layout::default().spacing(0).spacing, 0);
|
|
}
|
|
|
|
/// Tests for the `Layout::split()` function.
|
|
///
|
|
/// There are many tests in this as the number of edge cases that are caused by the interaction
|
|
/// between the constraints is quite large. The tests are split into sections based on the type
|
|
/// of constraints that are used.
|
|
///
|
|
/// These tests are characterization tests. This means that they are testing the way the code
|
|
/// currently works, and not the way it should work. This is because the current behavior is not
|
|
/// well defined, and it is not clear what the correct behavior should be. This means that if
|
|
/// the behavior changes, these tests should be updated to match the new behavior.
|
|
///
|
|
/// EOL comments in each test are intended to communicate the purpose of each test and to make
|
|
/// it easy to see that the tests are as exhaustive as feasible:
|
|
/// - zero: constraint is zero
|
|
/// - exact: constraint is equal to the space
|
|
/// - underflow: constraint is for less than the full space
|
|
/// - overflow: constraint is for more than the full space
|
|
mod split {
|
|
use pretty_assertions::assert_eq;
|
|
use rstest::rstest;
|
|
|
|
use crate::{
|
|
layout::flex::Flex,
|
|
prelude::{Constraint::*, *},
|
|
widgets::Paragraph,
|
|
};
|
|
|
|
/// Test that the given constraints applied to the given area result in the expected layout.
|
|
/// Each chunk is filled with a letter repeated as many times as the width of the chunk. The
|
|
/// resulting buffer is compared to the expected string.
|
|
///
|
|
/// This approach is used rather than testing the resulting rects directly because it is
|
|
/// easier to visualize the result, and it leads to more concise tests that are easier to
|
|
/// compare against each other. E.g. `"abc"` is much more concise than `[Rect::new(0, 0, 1,
|
|
/// 1), Rect::new(1, 0, 1, 1), Rect::new(2, 0, 1, 1)]`.
|
|
#[track_caller]
|
|
fn letters(flex: Flex, constraints: &[Constraint], width: u16, expected: &str) {
|
|
let area = Rect::new(0, 0, width, 1);
|
|
let layout = Layout::default()
|
|
.direction(Direction::Horizontal)
|
|
.constraints(constraints)
|
|
.flex(flex)
|
|
.split(area);
|
|
let mut buffer = Buffer::empty(area);
|
|
for (i, c) in ('a'..='z').take(constraints.len()).enumerate() {
|
|
let s = c.to_string().repeat(area.width as usize);
|
|
Paragraph::new(s).render(layout[i], &mut buffer);
|
|
}
|
|
assert_eq!(buffer, Buffer::with_lines([expected]));
|
|
}
|
|
|
|
#[rstest]
|
|
// flex, width, lengths, expected
|
|
#[case(Flex::Legacy, 1, &[Length(0)], "a")] // zero
|
|
#[case(Flex::Legacy, 1, &[Length(1)], "a")] // exact
|
|
#[case(Flex::Legacy, 1, &[Length(2)], "a")] // overflow
|
|
#[case(Flex::Legacy, 2, &[Length(0)], "aa")] // zero
|
|
#[case(Flex::Legacy, 2, &[Length(1)], "aa")] // underflow
|
|
#[case(Flex::Legacy, 2, &[Length(2)], "aa")] // exact
|
|
#[case(Flex::Legacy, 2, &[Length(3)], "aa")] // overflow
|
|
#[case(Flex::Legacy, 1, &[Length(0), Length(0)], "b")] // zero, zero
|
|
#[case(Flex::Legacy, 1, &[Length(0), Length(1)], "b")] // zero, exact
|
|
#[case(Flex::Legacy, 1, &[Length(0), Length(2)], "b")] // zero, overflow
|
|
#[case(Flex::Legacy, 1, &[Length(1), Length(0)], "a")] // exact, zero
|
|
#[case(Flex::Legacy, 1, &[Length(1), Length(1)], "a")] // exact, exact
|
|
#[case(Flex::Legacy, 1, &[Length(1), Length(2)], "a")] // exact, overflow
|
|
#[case(Flex::Legacy, 1, &[Length(2), Length(0)], "a")] // overflow, zero
|
|
#[case(Flex::Legacy, 1, &[Length(2), Length(1)], "a")] // overflow, exact
|
|
#[case(Flex::Legacy, 1, &[Length(2), Length(2)], "a")] // overflow, overflow
|
|
#[case(Flex::Legacy, 2, &[Length(0), Length(0)], "bb")] // zero, zero
|
|
#[case(Flex::Legacy, 2, &[Length(0), Length(1)], "bb")] // zero, underflow
|
|
#[case(Flex::Legacy, 2, &[Length(0), Length(2)], "bb")] // zero, exact
|
|
#[case(Flex::Legacy, 2, &[Length(0), Length(3)], "bb")] // zero, overflow
|
|
#[case(Flex::Legacy, 2, &[Length(1), Length(0)], "ab")] // underflow, zero
|
|
#[case(Flex::Legacy, 2, &[Length(1), Length(1)], "ab")] // underflow, underflow
|
|
#[case(Flex::Legacy, 2, &[Length(1), Length(2)], "ab")] // underflow, exact
|
|
#[case(Flex::Legacy, 2, &[Length(1), Length(3)], "ab")] // underflow, overflow
|
|
#[case(Flex::Legacy, 2, &[Length(2), Length(0)], "aa")] // exact, zero
|
|
#[case(Flex::Legacy, 2, &[Length(2), Length(1)], "aa")] // exact, underflow
|
|
#[case(Flex::Legacy, 2, &[Length(2), Length(2)], "aa")] // exact, exact
|
|
#[case(Flex::Legacy, 2, &[Length(2), Length(3)], "aa")] // exact, overflow
|
|
#[case(Flex::Legacy, 2, &[Length(3), Length(0)], "aa")] // overflow, zero
|
|
#[case(Flex::Legacy, 2, &[Length(3), Length(1)], "aa")] // overflow, underflow
|
|
#[case(Flex::Legacy, 2, &[Length(3), Length(2)], "aa")] // overflow, exact
|
|
#[case(Flex::Legacy, 2, &[Length(3), Length(3)], "aa")] // overflow, overflow
|
|
#[case(Flex::Legacy, 3, &[Length(2), Length(2)], "aab")] // with stretchlast
|
|
fn length(
|
|
#[case] flex: Flex,
|
|
#[case] width: u16,
|
|
#[case] constraints: &[Constraint],
|
|
#[case] expected: &str,
|
|
) {
|
|
letters(flex, constraints, width, expected);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case(Flex::Legacy, 1, &[Max(0)], "a")] // zero
|
|
#[case(Flex::Legacy, 1, &[Max(1)], "a")] // exact
|
|
#[case(Flex::Legacy, 1, &[Max(2)], "a")] // overflow
|
|
#[case(Flex::Legacy, 2, &[Max(0)], "aa")] // zero
|
|
#[case(Flex::Legacy, 2, &[Max(1)], "aa")] // underflow
|
|
#[case(Flex::Legacy, 2, &[Max(2)], "aa")] // exact
|
|
#[case(Flex::Legacy, 2, &[Max(3)], "aa")] // overflow
|
|
#[case(Flex::Legacy, 1, &[Max(0), Max(0)], "b")] // zero, zero
|
|
#[case(Flex::Legacy, 1, &[Max(0), Max(1)], "b")] // zero, exact
|
|
#[case(Flex::Legacy, 1, &[Max(0), Max(2)], "b")] // zero, overflow
|
|
#[case(Flex::Legacy, 1, &[Max(1), Max(0)], "a")] // exact, zero
|
|
#[case(Flex::Legacy, 1, &[Max(1), Max(1)], "a")] // exact, exact
|
|
#[case(Flex::Legacy, 1, &[Max(1), Max(2)], "a")] // exact, overflow
|
|
#[case(Flex::Legacy, 1, &[Max(2), Max(0)], "a")] // overflow, zero
|
|
#[case(Flex::Legacy, 1, &[Max(2), Max(1)], "a")] // overflow, exact
|
|
#[case(Flex::Legacy, 1, &[Max(2), Max(2)], "a")] // overflow, overflow
|
|
#[case(Flex::Legacy, 2, &[Max(0), Max(0)], "bb")] // zero, zero
|
|
#[case(Flex::Legacy, 2, &[Max(0), Max(1)], "bb")] // zero, underflow
|
|
#[case(Flex::Legacy, 2, &[Max(0), Max(2)], "bb")] // zero, exact
|
|
#[case(Flex::Legacy, 2, &[Max(0), Max(3)], "bb")] // zero, overflow
|
|
#[case(Flex::Legacy, 2, &[Max(1), Max(0)], "ab")] // underflow, zero
|
|
#[case(Flex::Legacy, 2, &[Max(1), Max(1)], "ab")] // underflow, underflow
|
|
#[case(Flex::Legacy, 2, &[Max(1), Max(2)], "ab")] // underflow, exact
|
|
#[case(Flex::Legacy, 2, &[Max(1), Max(3)], "ab")] // underflow, overflow
|
|
#[case(Flex::Legacy, 2, &[Max(2), Max(0)], "aa")] // exact, zero
|
|
#[case(Flex::Legacy, 2, &[Max(2), Max(1)], "aa")] // exact, underflow
|
|
#[case(Flex::Legacy, 2, &[Max(2), Max(2)], "aa")] // exact, exact
|
|
#[case(Flex::Legacy, 2, &[Max(2), Max(3)], "aa")] // exact, overflow
|
|
#[case(Flex::Legacy, 2, &[Max(3), Max(0)], "aa")] // overflow, zero
|
|
#[case(Flex::Legacy, 2, &[Max(3), Max(1)], "aa")] // overflow, underflow
|
|
#[case(Flex::Legacy, 2, &[Max(3), Max(2)], "aa")] // overflow, exact
|
|
#[case(Flex::Legacy, 2, &[Max(3), Max(3)], "aa")] // overflow, overflow
|
|
#[case(Flex::Legacy, 3, &[Max(2), Max(2)], "aab")]
|
|
fn max(
|
|
#[case] flex: Flex,
|
|
#[case] width: u16,
|
|
#[case] constraints: &[Constraint],
|
|
#[case] expected: &str,
|
|
) {
|
|
letters(flex, constraints, width, expected);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case(Flex::Legacy, 1, &[Min(0), Min(0)], "b")] // zero, zero
|
|
#[case(Flex::Legacy, 1, &[Min(0), Min(1)], "b")] // zero, exact
|
|
#[case(Flex::Legacy, 1, &[Min(0), Min(2)], "b")] // zero, overflow
|
|
#[case(Flex::Legacy, 1, &[Min(1), Min(0)], "a")] // exact, zero
|
|
#[case(Flex::Legacy, 1, &[Min(1), Min(1)], "a")] // exact, exact
|
|
#[case(Flex::Legacy, 1, &[Min(1), Min(2)], "a")] // exact, overflow
|
|
#[case(Flex::Legacy, 1, &[Min(2), Min(0)], "a")] // overflow, zero
|
|
#[case(Flex::Legacy, 1, &[Min(2), Min(1)], "a")] // overflow, exact
|
|
#[case(Flex::Legacy, 1, &[Min(2), Min(2)], "a")] // overflow, overflow
|
|
#[case(Flex::Legacy, 2, &[Min(0), Min(0)], "bb")] // zero, zero
|
|
#[case(Flex::Legacy, 2, &[Min(0), Min(1)], "bb")] // zero, underflow
|
|
#[case(Flex::Legacy, 2, &[Min(0), Min(2)], "bb")] // zero, exact
|
|
#[case(Flex::Legacy, 2, &[Min(0), Min(3)], "bb")] // zero, overflow
|
|
#[case(Flex::Legacy, 2, &[Min(1), Min(0)], "ab")] // underflow, zero
|
|
#[case(Flex::Legacy, 2, &[Min(1), Min(1)], "ab")] // underflow, underflow
|
|
#[case(Flex::Legacy, 2, &[Min(1), Min(2)], "ab")] // underflow, exact
|
|
#[case(Flex::Legacy, 2, &[Min(1), Min(3)], "ab")] // underflow, overflow
|
|
#[case(Flex::Legacy, 2, &[Min(2), Min(0)], "aa")] // exact, zero
|
|
#[case(Flex::Legacy, 2, &[Min(2), Min(1)], "aa")] // exact, underflow
|
|
#[case(Flex::Legacy, 2, &[Min(2), Min(2)], "aa")] // exact, exact
|
|
#[case(Flex::Legacy, 2, &[Min(2), Min(3)], "aa")] // exact, overflow
|
|
#[case(Flex::Legacy, 2, &[Min(3), Min(0)], "aa")] // overflow, zero
|
|
#[case(Flex::Legacy, 2, &[Min(3), Min(1)], "aa")] // overflow, underflow
|
|
#[case(Flex::Legacy, 2, &[Min(3), Min(2)], "aa")] // overflow, exact
|
|
#[case(Flex::Legacy, 2, &[Min(3), Min(3)], "aa")] // overflow, overflow
|
|
#[case(Flex::Legacy, 3, &[Min(2), Min(2)], "aab")]
|
|
fn min(
|
|
#[case] flex: Flex,
|
|
#[case] width: u16,
|
|
#[case] constraints: &[Constraint],
|
|
#[case] expected: &str,
|
|
) {
|
|
letters(flex, constraints, width, expected);
|
|
}
|
|
|
|
#[rstest] // flex, width, lengths, expected
|
|
// One constraint will take all the space (width = 1)
|
|
#[case(Flex::Legacy, 1, &[Percentage(0)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(25)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(50)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(90)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(100)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(200)], "a")]
|
|
// One constraint will take all the space (width = 2)
|
|
#[case(Flex::Legacy, 2, &[Percentage(0)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(10)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(25)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(50)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(66)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(100)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(200)], "aa")]
|
|
// One constraint will take all the space (width = 3)
|
|
#[case(Flex::Legacy, 10, &[Percentage(0)], "aaaaaaaaaa")]
|
|
#[case(Flex::Legacy, 10, &[Percentage(10)], "aaaaaaaaaa")]
|
|
#[case(Flex::Legacy, 10, &[Percentage(25)], "aaaaaaaaaa")]
|
|
#[case(Flex::Legacy, 10, &[Percentage(50)], "aaaaaaaaaa")]
|
|
#[case(Flex::Legacy, 10, &[Percentage(66)], "aaaaaaaaaa")]
|
|
#[case(Flex::Legacy, 10, &[Percentage(100)], "aaaaaaaaaa")]
|
|
#[case(Flex::Legacy, 10, &[Percentage(200)], "aaaaaaaaaa")]
|
|
// 0%/any allocates all the space to the second constraint
|
|
#[case(Flex::Legacy, 1, &[Percentage(0), Percentage(0)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(0), Percentage(10)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(0), Percentage(50)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(0), Percentage(90)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(0), Percentage(100)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(0), Percentage(200)], "b")]
|
|
// 10%/any allocates all the space to the second constraint (even if it is 0)
|
|
#[case(Flex::Legacy, 1, &[Percentage(10), Percentage(0)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(10), Percentage(10)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(10), Percentage(50)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(10), Percentage(90)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(10), Percentage(100)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(10), Percentage(200)], "b")]
|
|
// 50%/any allocates all the space to the first constraint
|
|
#[case(Flex::Legacy, 1, &[Percentage(50), Percentage(0)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(50), Percentage(50)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(50), Percentage(100)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(50), Percentage(200)], "a")]
|
|
// 90%/any allocates all the space to the first constraint
|
|
#[case(Flex::Legacy, 1, &[Percentage(90), Percentage(0)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(90), Percentage(50)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(90), Percentage(100)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(90), Percentage(200)], "a")]
|
|
// 100%/any allocates all the space to the first constraint
|
|
#[case(Flex::Legacy, 1, &[Percentage(100), Percentage(0)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(100), Percentage(50)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(100), Percentage(100)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Percentage(100), Percentage(200)], "a")]
|
|
// 0%/any allocates all the space to the second constraint
|
|
#[case(Flex::Legacy, 2, &[Percentage(0), Percentage(0)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(0), Percentage(25)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(0), Percentage(50)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(0), Percentage(100)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(0), Percentage(200)], "bb")]
|
|
// 10%/any allocates all the space to the second constraint
|
|
#[case(Flex::Legacy, 2, &[Percentage(10), Percentage(0)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(10), Percentage(25)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(10), Percentage(50)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(10), Percentage(100)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(10), Percentage(200)], "bb")]
|
|
// 25% * 2 = 0.5, which rounds up to 1, so the first constraint gets 1
|
|
#[case(Flex::Legacy, 2, &[Percentage(25), Percentage(0)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(25), Percentage(25)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(25), Percentage(50)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(25), Percentage(100)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(25), Percentage(200)], "ab")]
|
|
// 33% * 2 = 0.66, so the first constraint gets 1
|
|
#[case(Flex::Legacy, 2, &[Percentage(33), Percentage(0)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(33), Percentage(25)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(33), Percentage(50)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(33), Percentage(100)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(33), Percentage(200)], "ab")]
|
|
// 50% * 2 = 1, so the first constraint gets 1
|
|
#[case(Flex::Legacy, 2, &[Percentage(50), Percentage(0)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(50), Percentage(50)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(50), Percentage(100)], "ab")]
|
|
// 100%/any allocates all the space to the first constraint
|
|
// This is probably not the correct behavior, but it is the current behavior
|
|
#[case(Flex::Legacy, 2, &[Percentage(100), Percentage(0)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(100), Percentage(50)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Percentage(100), Percentage(100)], "aa")]
|
|
// 33%/any allocates 1 to the first constraint the rest to the second
|
|
#[case(Flex::Legacy, 3, &[Percentage(33), Percentage(33)], "abb")]
|
|
#[case(Flex::Legacy, 3, &[Percentage(33), Percentage(66)], "abb")]
|
|
// 33%/any allocates 1.33 = 1 to the first constraint the rest to the second
|
|
#[case(Flex::Legacy, 4, &[Percentage(33), Percentage(33)], "abbb")]
|
|
#[case(Flex::Legacy, 4, &[Percentage(33), Percentage(66)], "abbb")]
|
|
// Longer tests zero allocates everything to the second constraint
|
|
#[case(Flex::Legacy, 10, &[Percentage(0), Percentage(0)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(0), Percentage(25)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(0), Percentage(50)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(0), Percentage(100)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(0), Percentage(200)], "bbbbbbbbbb" )]
|
|
// 10% allocates a single character to the first constraint
|
|
#[case(Flex::Legacy, 10, &[Percentage(10), Percentage(0)], "abbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(10), Percentage(25)], "abbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(10), Percentage(50)], "abbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(10), Percentage(100)], "abbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(10), Percentage(200)], "abbbbbbbbb" )]
|
|
// 25% allocates 2.5 = 3 characters to the first constraint
|
|
#[case(Flex::Legacy, 10, &[Percentage(25), Percentage(0)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(25), Percentage(25)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(25), Percentage(50)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(25), Percentage(100)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(25), Percentage(200)], "aaabbbbbbb" )]
|
|
// 33% allocates 3.3 = 3 characters to the first constraint
|
|
#[case(Flex::Legacy, 10, &[Percentage(33), Percentage(0)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(33), Percentage(25)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(33), Percentage(50)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(33), Percentage(100)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(33), Percentage(200)], "aaabbbbbbb" )]
|
|
// 50% allocates 5 characters to the first constraint
|
|
#[case(Flex::Legacy, 10, &[Percentage(50), Percentage(0)], "aaaaabbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(50), Percentage(50)], "aaaaabbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(50), Percentage(100)], "aaaaabbbbb" )]
|
|
// 100% allocates everything to the first constraint
|
|
#[case(Flex::Legacy, 10, &[Percentage(100), Percentage(0)], "aaaaaaaaaa" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(100), Percentage(50)], "aaaaaaaaaa" )]
|
|
#[case(Flex::Legacy, 10, &[Percentage(100), Percentage(100)], "aaaaaaaaaa" )]
|
|
fn percentage(
|
|
#[case] flex: Flex,
|
|
#[case] width: u16,
|
|
#[case] constraints: &[Constraint],
|
|
#[case] expected: &str,
|
|
) {
|
|
letters(flex, constraints, width, expected);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case(Flex::Start, 10, &[Percentage(0), Percentage(0)], " " )]
|
|
#[case(Flex::Start, 10, &[Percentage(0), Percentage(25)], "bbb " )]
|
|
#[case(Flex::Start, 10, &[Percentage(0), Percentage(50)], "bbbbb " )]
|
|
#[case(Flex::Start, 10, &[Percentage(0), Percentage(100)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(0), Percentage(200)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(10), Percentage(0)], "a " )]
|
|
#[case(Flex::Start, 10, &[Percentage(10), Percentage(25)], "abbb " )]
|
|
#[case(Flex::Start, 10, &[Percentage(10), Percentage(50)], "abbbbb " )]
|
|
#[case(Flex::Start, 10, &[Percentage(10), Percentage(100)], "abbbbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(10), Percentage(200)], "abbbbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(25), Percentage(0)], "aaa " )]
|
|
#[case(Flex::Start, 10, &[Percentage(25), Percentage(25)], "aaabb " )]
|
|
#[case(Flex::Start, 10, &[Percentage(25), Percentage(50)], "aaabbbbb " )]
|
|
#[case(Flex::Start, 10, &[Percentage(25), Percentage(100)], "aaabbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(25), Percentage(200)], "aaabbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(33), Percentage(0)], "aaa " )]
|
|
#[case(Flex::Start, 10, &[Percentage(33), Percentage(25)], "aaabbb " )]
|
|
#[case(Flex::Start, 10, &[Percentage(33), Percentage(50)], "aaabbbbb " )]
|
|
#[case(Flex::Start, 10, &[Percentage(33), Percentage(100)], "aaabbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(33), Percentage(200)], "aaabbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(50), Percentage(0)], "aaaaa " )]
|
|
#[case(Flex::Start, 10, &[Percentage(50), Percentage(50)], "aaaaabbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(50), Percentage(100)], "aaaaabbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(100), Percentage(0)], "aaaaaaaaaa" )]
|
|
#[case(Flex::Start, 10, &[Percentage(100), Percentage(50)], "aaaaabbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(100), Percentage(100)], "aaaaabbbbb" )]
|
|
#[case(Flex::Start, 10, &[Percentage(100), Percentage(200)], "aaaaabbbbb" )]
|
|
fn percentage_start(
|
|
#[case] flex: Flex,
|
|
#[case] width: u16,
|
|
#[case] constraints: &[Constraint],
|
|
#[case] expected: &str,
|
|
) {
|
|
letters(flex, constraints, width, expected);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(0), Percentage(0)], " " )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(0), Percentage(25)], " bb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(0), Percentage(50)], " bbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(0), Percentage(100)], "bbbbbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(0), Percentage(200)], "bbbbbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(10), Percentage(0)], "a " )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(10), Percentage(25)], "a bb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(10), Percentage(50)], "a bbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(10), Percentage(100)], "abbbbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(10), Percentage(200)], "abbbbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(25), Percentage(0)], "aaa " )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(25), Percentage(25)], "aaa bb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(25), Percentage(50)], "aaa bbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(25), Percentage(100)], "aaabbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(25), Percentage(200)], "aaabbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(33), Percentage(0)], "aaa " )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(33), Percentage(25)], "aaa bb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(33), Percentage(50)], "aaa bbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(33), Percentage(100)], "aaabbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(33), Percentage(200)], "aaabbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(50), Percentage(0)], "aaaaa " )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(50), Percentage(50)], "aaaaabbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(50), Percentage(100)], "aaaaabbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(100), Percentage(0)], "aaaaaaaaaa" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(100), Percentage(50)], "aaaaabbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(100), Percentage(100)], "aaaaabbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Percentage(100), Percentage(200)], "aaaaabbbbb" )]
|
|
fn percentage_spacebetween(
|
|
#[case] flex: Flex,
|
|
#[case] width: u16,
|
|
#[case] constraints: &[Constraint],
|
|
#[case] expected: &str,
|
|
) {
|
|
letters(flex, constraints, width, expected);
|
|
}
|
|
|
|
#[rstest]
|
|
// flex, width, ratios, expected
|
|
// Just one ratio takes up the whole space
|
|
#[case(Flex::Legacy, 1, &[Ratio(0, 1)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 4)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 2)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(9, 10)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 1)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(2, 1)], "a")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(0, 1)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 10)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 4)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 2)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(2, 3)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 1)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(2, 1)], "aa")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(0, 1), Ratio(0, 1)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(0, 1), Ratio(1, 10)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(0, 1), Ratio(1, 2)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(0, 1), Ratio(9, 10)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(0, 1), Ratio(1, 1)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(0, 1), Ratio(2, 1)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 10), Ratio(0, 1)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 10), Ratio(1, 10)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 10), Ratio(1, 2)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 10), Ratio(9, 10)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 10), Ratio(1, 1)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 10), Ratio(2, 1)], "b")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 2), Ratio(0, 1)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 2), Ratio(1, 2)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 2), Ratio(1, 1)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 2), Ratio(2, 1)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(9, 10), Ratio(0, 1)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(9, 10), Ratio(1, 2)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(9, 10), Ratio(1, 1)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(9, 10), Ratio(2, 1)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 1), Ratio(0, 1)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 1), Ratio(1, 2)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 1), Ratio(1, 1)], "a")]
|
|
#[case(Flex::Legacy, 1, &[Ratio(1, 1), Ratio(2, 1)], "a")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(0, 1), Ratio(0, 1)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(0, 1), Ratio(1, 4)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(0, 1), Ratio(1, 2)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(0, 1), Ratio(1, 1)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(0, 1), Ratio(2, 1)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 10), Ratio(0, 1)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 10), Ratio(1, 4)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 10), Ratio(1, 2)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 10), Ratio(1, 1)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 10), Ratio(2, 1)], "bb")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 4), Ratio(0, 1)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 4), Ratio(1, 4)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 4), Ratio(1, 2)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 4), Ratio(1, 1)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 4), Ratio(2, 1)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 3), Ratio(0, 1)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 3), Ratio(1, 4)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 3), Ratio(1, 2)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 3), Ratio(1, 1)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 3), Ratio(2, 1)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 2), Ratio(0, 1)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 2), Ratio(1, 2)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 2), Ratio(1, 1)], "ab")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 1), Ratio(0, 1)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 1), Ratio(1, 2)], "aa")]
|
|
#[case(Flex::Legacy, 2, &[Ratio(1, 1), Ratio(1, 1)], "aa")]
|
|
#[case(Flex::Legacy, 3, &[Ratio(1, 3), Ratio(1, 3)], "abb")]
|
|
#[case(Flex::Legacy, 3, &[Ratio(1, 3), Ratio(2,3)], "abb")]
|
|
#[case(Flex::Legacy, 10, &[Ratio(0, 1), Ratio(0, 1)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(0, 1), Ratio(1, 4)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(0, 1), Ratio(1, 2)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(0, 1), Ratio(1, 1)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(0, 1), Ratio(2, 1)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 10), Ratio(0, 1)], "abbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 10), Ratio(1, 4)], "abbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 10), Ratio(1, 2)], "abbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 10), Ratio(1, 1)], "abbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 10), Ratio(2, 1)], "abbbbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 4), Ratio(0, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 4), Ratio(1, 4)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 4), Ratio(1, 2)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 4), Ratio(1, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 4), Ratio(2, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 3), Ratio(0, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 3), Ratio(1, 4)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 3), Ratio(1, 2)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 3), Ratio(1, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 3), Ratio(2, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 2), Ratio(0, 1)], "aaaaabbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 2), Ratio(1, 2)], "aaaaabbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 2), Ratio(1, 1)], "aaaaabbbbb" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 1), Ratio(0, 1)], "aaaaaaaaaa" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 1), Ratio(1, 2)], "aaaaaaaaaa" )]
|
|
#[case(Flex::Legacy, 10, &[Ratio(1, 1), Ratio(1, 1)], "aaaaaaaaaa" )]
|
|
fn ratio(
|
|
#[case] flex: Flex,
|
|
#[case] width: u16,
|
|
#[case] constraints: &[Constraint],
|
|
#[case] expected: &str,
|
|
) {
|
|
letters(flex, constraints, width, expected);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case(Flex::Start, 10, &[Ratio(0, 1), Ratio(0, 1)], " " )]
|
|
#[case(Flex::Start, 10, &[Ratio(0, 1), Ratio(1, 4)], "bbb " )]
|
|
#[case(Flex::Start, 10, &[Ratio(0, 1), Ratio(1, 2)], "bbbbb " )]
|
|
#[case(Flex::Start, 10, &[Ratio(0, 1), Ratio(1, 1)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(0, 1), Ratio(2, 1)], "bbbbbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 10), Ratio(0, 1)], "a " )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 10), Ratio(1, 4)], "abbb " )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 10), Ratio(1, 2)], "abbbbb " )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 10), Ratio(1, 1)], "abbbbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 10), Ratio(2, 1)], "abbbbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 4), Ratio(0, 1)], "aaa " )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 4), Ratio(1, 4)], "aaabb " )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 4), Ratio(1, 2)], "aaabbbbb " )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 4), Ratio(1, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 4), Ratio(2, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 3), Ratio(0, 1)], "aaa " )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 3), Ratio(1, 4)], "aaabbb " )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 3), Ratio(1, 2)], "aaabbbbb " )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 3), Ratio(1, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 3), Ratio(2, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 2), Ratio(0, 1)], "aaaaa " )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 2), Ratio(1, 2)], "aaaaabbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 2), Ratio(1, 1)], "aaaaabbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 1), Ratio(0, 1)], "aaaaaaaaaa" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 1), Ratio(1, 2)], "aaaaabbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 1), Ratio(1, 1)], "aaaaabbbbb" )]
|
|
#[case(Flex::Start, 10, &[Ratio(1, 1), Ratio(2, 1)], "aaaaabbbbb" )]
|
|
fn ratio_start(
|
|
#[case] flex: Flex,
|
|
#[case] width: u16,
|
|
#[case] constraints: &[Constraint],
|
|
#[case] expected: &str,
|
|
) {
|
|
letters(flex, constraints, width, expected);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(0, 1), Ratio(0, 1)], " " )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(0, 1), Ratio(1, 4)], " bb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(0, 1), Ratio(1, 2)], " bbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(0, 1), Ratio(1, 1)], "bbbbbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(0, 1), Ratio(2, 1)], "bbbbbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 10), Ratio(0, 1)], "a " )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 10), Ratio(1, 4)], "a bb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 10), Ratio(1, 2)], "a bbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 10), Ratio(1, 1)], "abbbbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 10), Ratio(2, 1)], "abbbbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 4), Ratio(0, 1)], "aaa " )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 4), Ratio(1, 4)], "aaa bb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 4), Ratio(1, 2)], "aaa bbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 4), Ratio(1, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 4), Ratio(2, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 3), Ratio(0, 1)], "aaa " )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 3), Ratio(1, 4)], "aaa bb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 3), Ratio(1, 2)], "aaa bbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 3), Ratio(1, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 3), Ratio(2, 1)], "aaabbbbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 2), Ratio(0, 1)], "aaaaa " )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 2), Ratio(1, 2)], "aaaaabbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 2), Ratio(1, 1)], "aaaaabbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 1), Ratio(0, 1)], "aaaaaaaaaa" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 1), Ratio(1, 2)], "aaaaabbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 1), Ratio(1, 1)], "aaaaabbbbb" )]
|
|
#[case(Flex::SpaceBetween, 10, &[Ratio(1, 1), Ratio(2, 1)], "aaaaabbbbb" )]
|
|
fn ratio_spacebetween(
|
|
#[case] flex: Flex,
|
|
#[case] width: u16,
|
|
#[case] constraints: &[Constraint],
|
|
#[case] expected: &str,
|
|
) {
|
|
letters(flex, constraints, width, expected);
|
|
}
|
|
|
|
#[test]
|
|
fn vertical_split_by_height() {
|
|
let target = Rect {
|
|
x: 2,
|
|
y: 2,
|
|
width: 10,
|
|
height: 10,
|
|
};
|
|
|
|
let chunks = Layout::default()
|
|
.direction(Direction::Vertical)
|
|
.constraints([
|
|
Constraint::Percentage(10),
|
|
Constraint::Max(5),
|
|
Constraint::Min(1),
|
|
])
|
|
.split(target);
|
|
|
|
assert_eq!(target.height, chunks.iter().map(|r| r.height).sum::<u16>());
|
|
chunks.windows(2).for_each(|w| assert!(w[0].y <= w[1].y));
|
|
}
|
|
|
|
#[test]
|
|
fn edge_cases() {
|
|
// stretches into last
|
|
let layout = Layout::default()
|
|
.constraints([
|
|
Constraint::Percentage(50),
|
|
Constraint::Percentage(50),
|
|
Constraint::Min(0),
|
|
])
|
|
.split(Rect::new(0, 0, 1, 1));
|
|
assert_eq!(
|
|
layout[..],
|
|
[
|
|
Rect::new(0, 0, 1, 1),
|
|
Rect::new(0, 1, 1, 0),
|
|
Rect::new(0, 1, 1, 0)
|
|
]
|
|
);
|
|
|
|
// stretches into last
|
|
let layout = Layout::default()
|
|
.constraints([
|
|
Constraint::Max(1),
|
|
Constraint::Percentage(99),
|
|
Constraint::Min(0),
|
|
])
|
|
.split(Rect::new(0, 0, 1, 1));
|
|
assert_eq!(
|
|
layout[..],
|
|
[
|
|
Rect::new(0, 0, 1, 0),
|
|
Rect::new(0, 0, 1, 1),
|
|
Rect::new(0, 1, 1, 0)
|
|
]
|
|
);
|
|
|
|
// minimal bug from
|
|
// https://github.com/ratatui/ratatui/pull/404#issuecomment-1681850644
|
|
// TODO: check if this bug is now resolved?
|
|
let layout = Layout::default()
|
|
.constraints([Min(1), Length(0), Min(1)])
|
|
.direction(Direction::Horizontal)
|
|
.split(Rect::new(0, 0, 1, 1));
|
|
assert_eq!(
|
|
layout[..],
|
|
[
|
|
Rect::new(0, 0, 1, 1),
|
|
Rect::new(1, 0, 0, 1),
|
|
Rect::new(1, 0, 0, 1),
|
|
]
|
|
);
|
|
|
|
// This stretches the 2nd last length instead of the last min based on ranking
|
|
let layout = Layout::default()
|
|
.constraints([Length(3), Min(4), Length(1), Min(4)])
|
|
.direction(Direction::Horizontal)
|
|
.split(Rect::new(0, 0, 7, 1));
|
|
assert_eq!(
|
|
layout[..],
|
|
[
|
|
Rect::new(0, 0, 0, 1),
|
|
Rect::new(0, 0, 4, 1),
|
|
Rect::new(4, 0, 0, 1),
|
|
Rect::new(4, 0, 3, 1),
|
|
]
|
|
);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::length_priority(vec![0, 100], vec![Length(25), Min(100)])]
|
|
#[case::length_priority(vec![25, 75], vec![Length(25), Min(0)])]
|
|
#[case::length_priority(vec![100, 0], vec![Length(25), Max(0)])]
|
|
#[case::length_priority(vec![25, 75], vec![Length(25), Max(100)])]
|
|
#[case::length_priority(vec![25, 75], vec![Length(25), Percentage(25)])]
|
|
#[case::length_priority(vec![75, 25], vec![Percentage(25), Length(25)])]
|
|
#[case::length_priority(vec![25, 75], vec![Length(25), Ratio(1, 4)])]
|
|
#[case::length_priority(vec![75, 25], vec![Ratio(1, 4), Length(25)])]
|
|
#[case::length_priority(vec![25, 75], vec![Length(25), Length(25)])]
|
|
#[case::excess_in_last_variable(vec![25, 25, 50], vec![Length(25), Length(25), Length(25)])]
|
|
#[case::excess_in_last_variable(vec![15, 35, 50], vec![Length(15), Length(35), Length(25)])]
|
|
#[case::three_lengths(vec![25, 25, 50], vec![Length(25), Length(25), Length(25)])]
|
|
fn constraint_length(#[case] expected: Vec<u16>, #[case] constraints: Vec<Constraint>) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.flex(Flex::Legacy)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| r.width)
|
|
.collect::<Vec<u16>>();
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::table_length_test(vec![Length(4), Length(4)], vec![(0, 3), (4, 3)], 7)]
|
|
#[case::table_length_test(vec![Length(4), Length(4)], vec![(0, 2), (3, 1)], 4)]
|
|
fn table_length(
|
|
#[case] constraints: Vec<Constraint>,
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] width: u16,
|
|
) {
|
|
let rect = Rect::new(0, 0, width, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.spacing(1)
|
|
.flex(Flex::Start)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::length_is_higher_priority_than_min_max(vec![50, 25, 25], vec![Min(25), Length(25), Max(25)])]
|
|
#[case::length_is_higher_priority_than_min_max(vec![25, 25, 50], vec![Max(25), Length(25), Min(25)])]
|
|
#[case::excess_in_lowest_priority(vec![33, 33, 34], vec![Length(33), Length(33), Length(33)])]
|
|
#[case::excess_in_lowest_priority(vec![25, 25, 50], vec![Length(25), Length(25), Length(25)])]
|
|
#[case::length_higher_priority(vec![25, 25, 50], vec![Percentage(25), Length(25), Ratio(1, 4)])]
|
|
#[case::length_higher_priority(vec![25, 50, 25], vec![Length(25), Ratio(1, 4), Percentage(25)])]
|
|
#[case::length_higher_priority(vec![50, 25, 25], vec![Ratio(1, 4), Length(25), Percentage(25)])]
|
|
#[case::length_higher_priority(vec![50, 25, 25], vec![Ratio(1, 4), Percentage(25), Length(25)])]
|
|
#[case::length_higher_priority(vec![80, 0, 20], vec![Length(100), Length(1), Min(20)])]
|
|
#[case::length_higher_priority(vec![20, 1, 79], vec![Min(20), Length(1), Length(100)])]
|
|
#[case::length_higher_priority(vec![45, 10, 45], vec![Fill(1), Length(10), Fill(1)])]
|
|
#[case::length_higher_priority(vec![30, 10, 60], vec![Fill(1), Length(10), Fill(2)])]
|
|
#[case::length_higher_priority(vec![18, 10, 72], vec![Fill(1), Length(10), Fill(4)])]
|
|
#[case::length_higher_priority(vec![15, 10, 75], vec![Fill(1), Length(10), Fill(5)])]
|
|
#[case::three_lengths_reference(vec![25, 25, 50], vec![Length(25), Length(25), Length(25)])]
|
|
#[case::previously_unstable_test(vec![25, 25, 50], vec![Length(25), Length(25), Length(25)])]
|
|
fn length_is_higher_priority(
|
|
#[case] expected: Vec<u16>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.flex(Flex::Legacy)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| r.width)
|
|
.collect::<Vec<u16>>();
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::length_is_higher_priority_than_min_max(vec![50, 25, 25], vec![Min(25), Length(25), Max(25)])]
|
|
#[case::length_is_higher_priority_than_min_max(vec![25, 25, 50], vec![Max(25), Length(25), Min(25)])]
|
|
#[case::excess_in_lowest_priority(vec![33, 33, 33], vec![Length(33), Length(33), Length(33)])]
|
|
#[case::excess_in_lowest_priority(vec![25, 25, 25], vec![Length(25), Length(25), Length(25)])]
|
|
#[case::length_higher_priority(vec![25, 25, 25], vec![Percentage(25), Length(25), Ratio(1, 4)])]
|
|
#[case::length_higher_priority(vec![25, 25, 25], vec![Length(25), Ratio(1, 4), Percentage(25)])]
|
|
#[case::length_higher_priority(vec![25, 25, 25], vec![Ratio(1, 4), Length(25), Percentage(25)])]
|
|
#[case::length_higher_priority(vec![25, 25, 25], vec![Ratio(1, 4), Percentage(25), Length(25)])]
|
|
#[case::length_higher_priority(vec![79, 1, 20], vec![Length(100), Length(1), Min(20)])]
|
|
#[case::length_higher_priority(vec![20, 1, 79], vec![Min(20), Length(1), Length(100)])]
|
|
#[case::length_higher_priority(vec![45, 10, 45], vec![Fill(1), Length(10), Fill(1)])]
|
|
#[case::length_higher_priority(vec![30, 10, 60], vec![Fill(1), Length(10), Fill(2)])]
|
|
#[case::length_higher_priority(vec![18, 10, 72], vec![Fill(1), Length(10), Fill(4)])]
|
|
#[case::length_higher_priority(vec![15, 10, 75], vec![Fill(1), Length(10), Fill(5)])]
|
|
#[case::previously_unstable_test(vec![25, 25, 25], vec![Length(25), Length(25), Length(25)])]
|
|
fn length_is_higher_priority_in_flex(
|
|
#[case] expected: Vec<u16>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(&constraints)
|
|
.flex(Flex::Start)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| r.width)
|
|
.collect::<Vec<u16>>();
|
|
assert_eq!(expected, r);
|
|
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(&constraints)
|
|
.flex(Flex::Center)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| r.width)
|
|
.collect::<Vec<u16>>();
|
|
assert_eq!(expected, r);
|
|
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(&constraints)
|
|
.flex(Flex::End)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| r.width)
|
|
.collect::<Vec<u16>>();
|
|
assert_eq!(expected, r);
|
|
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(&constraints)
|
|
.flex(Flex::SpaceAround)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| r.width)
|
|
.collect::<Vec<u16>>();
|
|
assert_eq!(expected, r);
|
|
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(&constraints)
|
|
.flex(Flex::SpaceBetween)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| r.width)
|
|
.collect::<Vec<u16>>();
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::excess_in_last_variable(vec![13, 10, 27], vec![Fill(1), Length(10), Fill(2)])]
|
|
#[case::excess_in_last_variable(vec![10, 27, 13], vec![Length(10), Fill(2), Fill(1)])] // might be unstable?
|
|
fn fixed_with_50_width(#[case] expected: Vec<u16>, #[case] constraints: Vec<Constraint>) {
|
|
let rect = Rect::new(0, 0, 50, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.flex(Flex::Legacy)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| r.width)
|
|
.collect::<Vec<u16>>();
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::multiple_same_fill_are_same(vec![20, 40, 20, 20], vec![Fill(1), Fill(2), Fill(1), Fill(1)])]
|
|
#[case::incremental(vec![10, 20, 30, 40], vec![Fill(1), Fill(2), Fill(3), Fill(4)])]
|
|
#[case::decremental(vec![40, 30, 20, 10], vec![Fill(4), Fill(3), Fill(2), Fill(1)])]
|
|
#[case::randomly_ordered(vec![10, 30, 20, 40], vec![Fill(1), Fill(3), Fill(2), Fill(4)])]
|
|
#[case::randomly_ordered(vec![5, 15, 50, 10, 20], vec![Fill(1), Fill(3), Length(50), Fill(2), Fill(4)])]
|
|
#[case::randomly_ordered(vec![5, 15, 50, 10, 20], vec![Fill(1), Fill(3), Length(50), Fill(2), Fill(4)])]
|
|
#[case::randomly_ordered(vec![5, 15, 50, 10, 20], vec![Fill(1), Fill(3), Percentage(50), Fill(2), Fill(4)])]
|
|
#[case::randomly_ordered(vec![5, 15, 50, 10, 20], vec![Fill(1), Fill(3), Min(50), Fill(2), Fill(4)])]
|
|
#[case::randomly_ordered(vec![5, 15, 50, 10, 20], vec![Fill(1), Fill(3), Max(50), Fill(2), Fill(4)])]
|
|
#[case::zero_width(vec![0, 100, 0], vec![Fill(0), Fill(1), Fill(0)])]
|
|
#[case::zero_width(vec![50, 1, 49], vec![Fill(0), Length(1), Fill(0)])]
|
|
#[case::zero_width(vec![50, 1, 49], vec![Fill(0), Length(1), Fill(0)])]
|
|
#[case::zero_width(vec![50, 1, 49], vec![Fill(0), Percentage(1), Fill(0)])]
|
|
#[case::zero_width(vec![50, 1, 49], vec![Fill(0), Min(1), Fill(0)])]
|
|
#[case::zero_width(vec![50, 1, 49], vec![Fill(0), Max(1), Fill(0)])]
|
|
#[case::zero_width(vec![0, 67, 0, 33], vec![Fill(0), Fill(2), Fill(0), Fill(1)])]
|
|
#[case::space_filler(vec![0, 80, 20], vec![Fill(0), Fill(2), Percentage(20)])]
|
|
#[case::space_filler(vec![40, 40, 20], vec![Fill(0), Fill(0), Percentage(20)])]
|
|
#[case::space_filler(vec![80, 20], vec![Fill(0), Ratio(1, 5)])]
|
|
#[case::space_filler(vec![0, 100], vec![Fill(0), Fill(u16::MAX)])]
|
|
#[case::space_filler(vec![100, 0], vec![Fill(u16::MAX), Fill(0)])]
|
|
#[case::space_filler(vec![80, 20], vec![Fill(0), Percentage(20)])]
|
|
#[case::space_filler(vec![80, 20], vec![Fill(1), Percentage(20)])]
|
|
#[case::space_filler(vec![80, 20], vec![Fill(u16::MAX), Percentage(20)])]
|
|
#[case::space_filler(vec![80, 0, 20], vec![Fill(u16::MAX), Fill(0), Percentage(20)])]
|
|
#[case::space_filler(vec![80, 20], vec![Fill(0), Length(20)])]
|
|
#[case::space_filler(vec![80, 20], vec![Fill(0), Length(20)])]
|
|
#[case::space_filler(vec![80, 20], vec![Fill(0), Min(20)])]
|
|
#[case::space_filler(vec![80, 20], vec![Fill(0), Max(20)])]
|
|
#[case::fill_collapses_first(vec![7, 6, 7, 30, 50], vec![Fill(1), Fill(1), Fill(1), Min(30), Length(50)])]
|
|
#[case::fill_collapses_first(vec![0, 0, 0, 50, 50], vec![Fill(1), Fill(1), Fill(1), Length(50), Length(50)])]
|
|
#[case::fill_collapses_first(vec![0, 0, 0, 75, 25], vec![Fill(1), Fill(1), Fill(1), Length(75), Length(50)])]
|
|
#[case::fill_collapses_first(vec![0, 0, 0, 50, 50], vec![Fill(1), Fill(1), Fill(1), Min(50), Max(50)])]
|
|
#[case::fill_collapses_first(vec![0, 0, 0, 100], vec![Fill(1), Fill(1), Fill(1), Ratio(1, 1)])]
|
|
#[case::fill_collapses_first(vec![0, 0, 0, 100], vec![Fill(1), Fill(1), Fill(1), Percentage(100)])]
|
|
fn fill(#[case] expected: Vec<u16>, #[case] constraints: Vec<Constraint>) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.flex(Flex::Legacy)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| r.width)
|
|
.collect::<Vec<u16>>();
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::min_percentage(vec![80, 20], vec![Min(0), Percentage(20)])]
|
|
#[case::max_percentage(vec![0, 100], vec![Max(0), Percentage(20)])]
|
|
fn percentage_parameterized(
|
|
#[case] expected: Vec<u16>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.flex(Flex::Legacy)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| r.width)
|
|
.collect::<Vec<u16>>();
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::min_max_priority(vec![100, 0], vec![Max(100), Min(0)])]
|
|
#[case::min_max_priority(vec![0, 100], vec![Min(0), Max(100)])]
|
|
#[case::min_max_priority(vec![90, 10], vec![Length(u16::MAX), Min(10)])]
|
|
#[case::min_max_priority(vec![10, 90], vec![Min(10), Length(u16::MAX)])]
|
|
#[case::min_max_priority(vec![90, 10], vec![Length(0), Max(10)])]
|
|
#[case::min_max_priority(vec![10, 90], vec![Max(10), Length(0)])]
|
|
fn min_max(#[case] expected: Vec<u16>, #[case] constraints: Vec<Constraint>) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.flex(Flex::Legacy)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| r.width)
|
|
.collect::<Vec<u16>>();
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::length(vec![(0, 100)], vec![Length(50)], Flex::Legacy)]
|
|
#[case::length(vec![(0, 50)], vec![Length(50)], Flex::Start)]
|
|
#[case::length(vec![(50, 50)], vec![Length(50)], Flex::End)]
|
|
#[case::length(vec![(25, 50)], vec![Length(50)], Flex::Center)]
|
|
#[case::ratio(vec![(0, 100)], vec![Ratio(1, 2)], Flex::Legacy)]
|
|
#[case::ratio(vec![(0, 50)], vec![Ratio(1, 2)], Flex::Start)]
|
|
#[case::ratio(vec![(50, 50)], vec![Ratio(1, 2)], Flex::End)]
|
|
#[case::ratio(vec![(25, 50)], vec![Ratio(1, 2)], Flex::Center)]
|
|
#[case::percent(vec![(0, 100)], vec![Percentage(50)], Flex::Legacy)]
|
|
#[case::percent(vec![(0, 50)], vec![Percentage(50)], Flex::Start)]
|
|
#[case::percent(vec![(50, 50)], vec![Percentage(50)], Flex::End)]
|
|
#[case::percent(vec![(25, 50)], vec![Percentage(50)], Flex::Center)]
|
|
#[case::min(vec![(0, 100)], vec![Min(50)], Flex::Legacy)]
|
|
#[case::min(vec![(0, 100)], vec![Min(50)], Flex::Start)]
|
|
#[case::min(vec![(0, 100)], vec![Min(50)], Flex::End)]
|
|
#[case::min(vec![(0, 100)], vec![Min(50)], Flex::Center)]
|
|
#[case::max(vec![(0, 100)], vec![Max(50)], Flex::Legacy)]
|
|
#[case::max(vec![(0, 50)], vec![Max(50)], Flex::Start)]
|
|
#[case::max(vec![(50, 50)], vec![Max(50)], Flex::End)]
|
|
#[case::max(vec![(25, 50)], vec![Max(50)], Flex::Center)]
|
|
#[case::spacebetween_becomes_stretch(vec![(0, 100)], vec![Min(1)], Flex::SpaceBetween)]
|
|
#[case::spacebetween_becomes_stretch(vec![(0, 100)], vec![Max(20)], Flex::SpaceBetween)]
|
|
#[case::spacebetween_becomes_stretch(vec![(0, 100)], vec![Length(20)], Flex::SpaceBetween)]
|
|
#[case::length(vec![(0, 25), (25, 75)], vec![Length(25), Length(25)], Flex::Legacy)]
|
|
#[case::length(vec![(0, 25), (25, 25)], vec![Length(25), Length(25)], Flex::Start)]
|
|
#[case::length(vec![(25, 25), (50, 25)], vec![Length(25), Length(25)], Flex::Center)]
|
|
#[case::length(vec![(50, 25), (75, 25)], vec![Length(25), Length(25)], Flex::End)]
|
|
#[case::length(vec![(0, 25), (75, 25)], vec![Length(25), Length(25)], Flex::SpaceBetween)]
|
|
#[case::length(vec![(17, 25), (58, 25)], vec![Length(25), Length(25)], Flex::SpaceAround)]
|
|
#[case::percentage(vec![(0, 25), (25, 75)], vec![Percentage(25), Percentage(25)], Flex::Legacy)]
|
|
#[case::percentage(vec![(0, 25), (25, 25)], vec![Percentage(25), Percentage(25)], Flex::Start)]
|
|
#[case::percentage(vec![(25, 25), (50, 25)], vec![Percentage(25), Percentage(25)], Flex::Center)]
|
|
#[case::percentage(vec![(50, 25), (75, 25)], vec![Percentage(25), Percentage(25)], Flex::End)]
|
|
#[case::percentage(vec![(0, 25), (75, 25)], vec![Percentage(25), Percentage(25)], Flex::SpaceBetween)]
|
|
#[case::percentage(vec![(17, 25), (58, 25)], vec![Percentage(25), Percentage(25)], Flex::SpaceAround)]
|
|
#[case::min(vec![(0, 25), (25, 75)], vec![Min(25), Min(25)], Flex::Legacy)]
|
|
#[case::min(vec![(0, 50), (50, 50)], vec![Min(25), Min(25)], Flex::Start)]
|
|
#[case::min(vec![(0, 50), (50, 50)], vec![Min(25), Min(25)], Flex::Center)]
|
|
#[case::min(vec![(0, 50), (50, 50)], vec![Min(25), Min(25)], Flex::End)]
|
|
#[case::min(vec![(0, 50), (50, 50)], vec![Min(25), Min(25)], Flex::SpaceBetween)]
|
|
#[case::min(vec![(0, 50), (50, 50)], vec![Min(25), Min(25)], Flex::SpaceAround)]
|
|
#[case::max(vec![(0, 25), (25, 75)], vec![Max(25), Max(25)], Flex::Legacy)]
|
|
#[case::max(vec![(0, 25), (25, 25)], vec![Max(25), Max(25)], Flex::Start)]
|
|
#[case::max(vec![(25, 25), (50, 25)], vec![Max(25), Max(25)], Flex::Center)]
|
|
#[case::max(vec![(50, 25), (75, 25)], vec![Max(25), Max(25)], Flex::End)]
|
|
#[case::max(vec![(0, 25), (75, 25)], vec![Max(25), Max(25)], Flex::SpaceBetween)]
|
|
#[case::max(vec![(17, 25), (58, 25)], vec![Max(25), Max(25)], Flex::SpaceAround)]
|
|
#[case::length_spaced_around(vec![(0, 25), (38, 25), (75, 25)], vec![Length(25), Length(25), Length(25)], Flex::SpaceBetween)]
|
|
fn flex_constraint(
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
#[case] flex: Flex,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.flex(flex)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::length_spacing(vec![(0 , 20), (20, 20) , (40, 20)], vec![Length(20), Length(20), Length(20)], Flex::Start , 0)]
|
|
#[case::length_spacing(vec![(0 , 20), (22, 20) , (44, 20)], vec![Length(20), Length(20), Length(20)], Flex::Start , 2)]
|
|
#[case::length_spacing(vec![(18, 20), (40, 20) , (62, 20)], vec![Length(20), Length(20), Length(20)], Flex::Center , 2)]
|
|
#[case::length_spacing(vec![(36, 20), (58, 20) , (80, 20)], vec![Length(20), Length(20), Length(20)], Flex::End , 2)]
|
|
#[case::length_spacing(vec![(0 , 20), (22, 20) , (44, 56)], vec![Length(20), Length(20), Length(20)], Flex::Legacy , 2)]
|
|
#[case::length_spacing(vec![(0 , 20), (40, 20) , (80, 20)], vec![Length(20), Length(20), Length(20)], Flex::SpaceBetween, 2)]
|
|
#[case::length_spacing(vec![(10, 20), (40, 20) , (70, 20)], vec![Length(20), Length(20), Length(20)], Flex::SpaceAround, 2)]
|
|
fn flex_spacing(
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
#[case] flex: Flex,
|
|
#[case] spacing: u16,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.flex(flex)
|
|
.spacing(spacing)
|
|
.split(rect);
|
|
let result = r
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, result);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::a(vec![(0, 25), (25, 75)], vec![Length(25), Length(25)])]
|
|
#[case::b(vec![(0, 25), (25, 75)], vec![Length(25), Percentage(25)])]
|
|
#[case::c(vec![(0, 75), (75, 25)], vec![Percentage(25), Length(25)])]
|
|
#[case::d(vec![(0, 75), (75, 25)], vec![Min(25), Percentage(25)])]
|
|
#[case::e(vec![(0, 25), (25, 75)], vec![Percentage(25), Min(25)])]
|
|
#[case::f(vec![(0, 25), (25, 75)], vec![Min(25), Percentage(100)])]
|
|
#[case::g(vec![(0, 75), (75, 25)], vec![Percentage(100), Min(25)])]
|
|
#[case::h(vec![(0, 25), (25, 75)], vec![Max(75), Percentage(75)])]
|
|
#[case::i(vec![(0, 75), (75, 25)], vec![Percentage(75), Max(75)])]
|
|
#[case::j(vec![(0, 25), (25, 75)], vec![Max(25), Percentage(25)])]
|
|
#[case::k(vec![(0, 75), (75, 25)], vec![Percentage(25), Max(25)])]
|
|
#[case::l(vec![(0, 25), (25, 75)], vec![Length(25), Ratio(1, 4)])]
|
|
#[case::m(vec![(0, 75), (75, 25)], vec![Ratio(1, 4), Length(25)])]
|
|
#[case::n(vec![(0, 25), (25, 75)], vec![Percentage(25), Ratio(1, 4)])]
|
|
#[case::o(vec![(0, 75), (75, 25)], vec![Ratio(1, 4), Percentage(25)])]
|
|
#[case::p(vec![(0, 25), (25, 75)], vec![Ratio(1, 4), Fill(25)])]
|
|
#[case::q(vec![(0, 75), (75, 25)], vec![Fill(25), Ratio(1, 4)])]
|
|
fn constraint_specification_tests_for_priority(
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.flex(Flex::Legacy)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::a(vec![(0, 20), (20, 20), (40, 20)], vec![Length(20), Length(20), Length(20)], Flex::Start, 0)]
|
|
#[case::b(vec![(18, 20), (40, 20), (62, 20)], vec![Length(20), Length(20), Length(20)], Flex::Center, 2)]
|
|
#[case::c(vec![(36, 20), (58, 20), (80, 20)], vec![Length(20), Length(20), Length(20)], Flex::End, 2)]
|
|
#[case::d(vec![(0, 20), (22, 20), (44, 56)], vec![Length(20), Length(20), Length(20)], Flex::Legacy, 2)]
|
|
#[case::e(vec![(0, 20), (22, 20), (44, 56)], vec![Length(20), Length(20), Length(20)], Flex::Legacy, 2)]
|
|
#[case::f(vec![(10, 20), (40, 20), (70, 20)], vec![Length(20), Length(20), Length(20)], Flex::SpaceAround, 2)]
|
|
fn constraint_specification_tests_for_priority_with_spacing(
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
#[case] flex: Flex,
|
|
#[case] spacing: u16,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.spacing(spacing)
|
|
.flex(flex)
|
|
.split(rect)
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::prop(vec![(0 , 10), (10, 80), (90 , 10)] , vec![Length(10), Fill(1), Length(10)], Flex::Legacy)]
|
|
#[case::flex(vec![(0 , 10), (90 , 10)] , vec![Length(10), Length(10)], Flex::SpaceBetween)]
|
|
#[case::prop(vec![(0 , 27), (27, 10), (37, 26), (63, 10), (73, 27)] , vec![Fill(1), Length(10), Fill(1), Length(10), Fill(1)], Flex::Legacy)]
|
|
#[case::flex(vec![(27 , 10), (63, 10)] , vec![Length(10), Length(10)], Flex::SpaceAround)]
|
|
#[case::prop(vec![(0 , 10), (10, 10), (20 , 80)] , vec![Length(10), Length(10), Fill(1)], Flex::Legacy)]
|
|
#[case::flex(vec![(0 , 10), (10, 10)] , vec![Length(10), Length(10)], Flex::Start)]
|
|
#[case::prop(vec![(0 , 80), (80 , 10), (90, 10)] , vec![Fill(1), Length(10), Length(10)], Flex::Legacy)]
|
|
#[case::flex(vec![(80 , 10), (90, 10)] , vec![Length(10), Length(10)], Flex::End)]
|
|
#[case::prop(vec![(0 , 40), (40, 10), (50, 10), (60, 40)] , vec![Fill(1), Length(10), Length(10), Fill(1)], Flex::Legacy)]
|
|
#[case::flex(vec![(40 , 10), (50, 10)] , vec![Length(10), Length(10)], Flex::Center)]
|
|
fn fill_vs_flex(
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
#[case] flex: Flex,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints).flex(flex).split(rect);
|
|
let result = r
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, result);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::flex0(vec![(0 , 50), (50 , 50)] , vec![Fill(1), Fill(1)], Flex::Legacy , 0)]
|
|
#[case::flex0(vec![(0 , 50), (50 , 50)] , vec![Fill(1), Fill(1)], Flex::SpaceAround , 0)]
|
|
#[case::flex0(vec![(0 , 50), (50 , 50)] , vec![Fill(1), Fill(1)], Flex::SpaceBetween , 0)]
|
|
#[case::flex0(vec![(0 , 50), (50 , 50)] , vec![Fill(1), Fill(1)], Flex::Start , 0)]
|
|
#[case::flex0(vec![(0 , 50), (50 , 50)] , vec![Fill(1), Fill(1)], Flex::Center , 0)]
|
|
#[case::flex0(vec![(0 , 50), (50 , 50)] , vec![Fill(1), Fill(1)], Flex::End , 0)]
|
|
#[case::flex10(vec![(0 , 45), (55 , 45)] , vec![Fill(1), Fill(1)], Flex::Legacy , 10)]
|
|
#[case::flex10(vec![(0 , 45), (55 , 45)] , vec![Fill(1), Fill(1)], Flex::Start , 10)]
|
|
#[case::flex10(vec![(0 , 45), (55 , 45)] , vec![Fill(1), Fill(1)], Flex::Center , 10)]
|
|
#[case::flex10(vec![(0 , 45), (55 , 45)] , vec![Fill(1), Fill(1)], Flex::End , 10)]
|
|
#[case::flex10(vec![(10 , 35), (55 , 35)] , vec![Fill(1), Fill(1)], Flex::SpaceAround , 10)]
|
|
#[case::flex10(vec![(0 , 45), (55 , 45)] , vec![Fill(1), Fill(1)], Flex::SpaceBetween , 10)]
|
|
#[case::flex_length0(vec![(0 , 45), (45, 10), (55 , 45)] , vec![Fill(1), Length(10), Fill(1)], Flex::Legacy , 0)]
|
|
#[case::flex_length0(vec![(0 , 45), (45, 10), (55 , 45)] , vec![Fill(1), Length(10), Fill(1)], Flex::SpaceAround , 0)]
|
|
#[case::flex_length0(vec![(0 , 45), (45, 10), (55 , 45)] , vec![Fill(1), Length(10), Fill(1)], Flex::SpaceBetween , 0)]
|
|
#[case::flex_length0(vec![(0 , 45), (45, 10), (55 , 45)] , vec![Fill(1), Length(10), Fill(1)], Flex::Start , 0)]
|
|
#[case::flex_length0(vec![(0 , 45), (45, 10), (55 , 45)] , vec![Fill(1), Length(10), Fill(1)], Flex::Center , 0)]
|
|
#[case::flex_length0(vec![(0 , 45), (45, 10), (55 , 45)] , vec![Fill(1), Length(10), Fill(1)], Flex::End , 0)]
|
|
#[case::flex_length10(vec![(0 , 35), (45, 10), (65 , 35)] , vec![Fill(1), Length(10), Fill(1)], Flex::Legacy , 10)]
|
|
#[case::flex_length10(vec![(0 , 35), (45, 10), (65 , 35)] , vec![Fill(1), Length(10), Fill(1)], Flex::Start , 10)]
|
|
#[case::flex_length10(vec![(0 , 35), (45, 10), (65 , 35)] , vec![Fill(1), Length(10), Fill(1)], Flex::Center , 10)]
|
|
#[case::flex_length10(vec![(0 , 35), (45, 10), (65 , 35)] , vec![Fill(1), Length(10), Fill(1)], Flex::End , 10)]
|
|
#[case::flex_length10(vec![(10 , 25), (45, 10), (65 , 25)] , vec![Fill(1), Length(10), Fill(1)], Flex::SpaceAround , 10)]
|
|
#[case::flex_length10(vec![(0 , 35), (45, 10), (65 , 35)] , vec![Fill(1), Length(10), Fill(1)], Flex::SpaceBetween , 10)]
|
|
fn fill_spacing(
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
#[case] flex: Flex,
|
|
#[case] spacing: u16,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.flex(flex)
|
|
.spacing(spacing)
|
|
.split(rect);
|
|
let result = r
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, result);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::flex_length10(vec![(0, 10), (90, 10)], vec![Length(10), Length(10)], Flex::Center, 80)]
|
|
fn flex_spacing_lower_priority_than_user_spacing(
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
#[case] flex: Flex,
|
|
#[case] spacing: u16,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints)
|
|
.flex(flex)
|
|
.spacing(spacing)
|
|
.split(rect);
|
|
let result = r
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, result);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::spacers(vec![(0, 0), (10, 0), (100, 0)], vec![Length(10), Length(10)], Flex::Legacy)]
|
|
#[case::spacers(vec![(0, 0), (10, 80), (100, 0)], vec![Length(10), Length(10)], Flex::SpaceBetween)]
|
|
#[case::spacers(vec![(0, 27), (37, 26), (73, 27)], vec![Length(10), Length(10)], Flex::SpaceAround)]
|
|
#[case::spacers(vec![(0, 0), (10, 0), (20, 80)], vec![Length(10), Length(10)], Flex::Start)]
|
|
#[case::spacers(vec![(0, 40), (50, 0), (60, 40)], vec![Length(10), Length(10)], Flex::Center)]
|
|
#[case::spacers(vec![(0, 80), (90, 0), (100, 0)], vec![Length(10), Length(10)], Flex::End)]
|
|
fn split_with_spacers_no_spacing(
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
#[case] flex: Flex,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let (_, s) = Layout::horizontal(&constraints)
|
|
.flex(flex)
|
|
.split_with_spacers(rect);
|
|
assert_eq!(s.len(), constraints.len() + 1);
|
|
let result = s
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, result);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::spacers(vec![(0, 0), (10, 5), (100, 0)], vec![Length(10), Length(10)], Flex::Legacy, 5)]
|
|
#[case::spacers(vec![(0, 0), (10, 80), (100, 0)], vec![Length(10), Length(10)], Flex::SpaceBetween, 5)]
|
|
#[case::spacers(vec![(0, 27), (37, 26), (73, 27)], vec![Length(10), Length(10)], Flex::SpaceAround, 5)]
|
|
#[case::spacers(vec![(0, 0), (10, 5), (25, 75)], vec![Length(10), Length(10)], Flex::Start, 5)]
|
|
#[case::spacers(vec![(0, 38), (48, 5), (63, 37)], vec![Length(10), Length(10)], Flex::Center, 5)]
|
|
#[case::spacers(vec![(0, 75), (85, 5), (100, 0)], vec![Length(10), Length(10)], Flex::End, 5)]
|
|
fn split_with_spacers_and_spacing(
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
#[case] flex: Flex,
|
|
#[case] spacing: u16,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let (_, s) = Layout::horizontal(&constraints)
|
|
.flex(flex)
|
|
.spacing(spacing)
|
|
.split_with_spacers(rect);
|
|
assert_eq!(s.len(), constraints.len() + 1);
|
|
let result = s
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, result);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::spacers(vec![(0, 0), (0, 100), (100, 0)], vec![Length(10), Length(10)], Flex::Legacy, 200)]
|
|
#[case::spacers(vec![(0, 0), (0, 100), (100, 0)], vec![Length(10), Length(10)], Flex::SpaceBetween, 200)]
|
|
#[case::spacers(vec![(0, 33), (33, 34), (67, 33)], vec![Length(10), Length(10)], Flex::SpaceAround, 200)]
|
|
#[case::spacers(vec![(0, 0), (0, 100), (100, 0)], vec![Length(10), Length(10)], Flex::Start, 200)]
|
|
#[case::spacers(vec![(0, 0), (0, 100), (100, 0)], vec![Length(10), Length(10)], Flex::Center, 200)]
|
|
#[case::spacers(vec![(0, 0), (0, 100), (100, 0)], vec![Length(10), Length(10)], Flex::End, 200)]
|
|
fn split_with_spacers_and_too_much_spacing(
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
#[case] flex: Flex,
|
|
#[case] spacing: u16,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let (_, s) = Layout::horizontal(&constraints)
|
|
.flex(flex)
|
|
.spacing(spacing)
|
|
.split_with_spacers(rect);
|
|
assert_eq!(s.len(), constraints.len() + 1);
|
|
let result = s
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, result);
|
|
}
|
|
|
|
#[rstest]
|
|
#[case::compare(vec![(0, 90), (90, 10)], vec![Min(10), Length(10)], Flex::Legacy)]
|
|
#[case::compare(vec![(0, 90), (90, 10)], vec![Min(10), Length(10)], Flex::Start)]
|
|
#[case::compare(vec![(0, 10), (10, 90)], vec![Min(10), Percentage(100)], Flex::Legacy)]
|
|
#[case::compare(vec![(0, 10), (10, 90)], vec![Min(10), Percentage(100)], Flex::Start)]
|
|
#[case::compare(vec![(0, 50), (50, 50)], vec![Percentage(50), Percentage(50)], Flex::Legacy)]
|
|
#[case::compare(vec![(0, 50), (50, 50)], vec![Percentage(50), Percentage(50)], Flex::Start)]
|
|
fn legacy_vs_default(
|
|
#[case] expected: Vec<(u16, u16)>,
|
|
#[case] constraints: Vec<Constraint>,
|
|
#[case] flex: Flex,
|
|
) {
|
|
let rect = Rect::new(0, 0, 100, 1);
|
|
let r = Layout::horizontal(constraints).flex(flex).split(rect);
|
|
let result = r
|
|
.iter()
|
|
.map(|r| (r.x, r.width))
|
|
.collect::<Vec<(u16, u16)>>();
|
|
assert_eq!(expected, result);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_solver() {
|
|
use super::*;
|
|
|
|
let mut solver = Solver::new();
|
|
let x = Variable::new();
|
|
let y = Variable::new();
|
|
|
|
solver.add_constraint((x + y) | EQ(4.0) | 5.0).unwrap();
|
|
solver.add_constraint(x | EQ(1.0) | 2.0).unwrap();
|
|
for _ in 0..5 {
|
|
solver.add_constraint(y | EQ(1.0) | 2.0).unwrap();
|
|
}
|
|
|
|
let changes: HashMap<Variable, f64> = solver.fetch_changes().iter().copied().collect();
|
|
let x = changes.get(&x).unwrap_or(&0.0).round() as u16;
|
|
let y = changes.get(&y).unwrap_or(&0.0).round() as u16;
|
|
assert_eq!(x, 3);
|
|
assert_eq!(y, 2);
|
|
|
|
let mut solver = Solver::new();
|
|
let x = Variable::new();
|
|
let y = Variable::new();
|
|
|
|
solver.add_constraint((x + y) | EQ(4.0) | 5.0).unwrap();
|
|
solver.add_constraint(y | EQ(1.0) | 2.0).unwrap();
|
|
for _ in 0..5 {
|
|
solver.add_constraint(x | EQ(1.0) | 2.0).unwrap();
|
|
}
|
|
|
|
let changes: HashMap<Variable, f64> = solver.fetch_changes().iter().copied().collect();
|
|
let x = changes.get(&x).unwrap_or(&0.0).round() as u16;
|
|
let y = changes.get(&y).unwrap_or(&0.0).round() as u16;
|
|
assert_eq!(x, 2);
|
|
assert_eq!(y, 3);
|
|
}
|
|
}
|