feat(no_std): make ratatui-widgets no_std (#1779)

Resolves #1776

ratatui-widgets/src/barchart.rs

@@ -1,5 +1,8 @@
 //! The [`BarChart`] widget and its related types (e.g. [`Bar`], [`BarGroup`]).
 
+use alloc::vec;
+use alloc::vec::Vec;
+
 use ratatui_core::buffer::Buffer;
 use ratatui_core::layout::{Direction, Rect};
 use ratatui_core::style::{Style, Styled};

ratatui-widgets/src/barchart/bar.rs

@@ -1,3 +1,5 @@
+use alloc::string::{String, ToString};
+
 use ratatui_core::buffer::Buffer;
 use ratatui_core::layout::Rect;
 use ratatui_core::style::{Style, Styled};

ratatui-widgets/src/barchart/bar_group.rs

@@ -1,3 +1,5 @@
+use alloc::vec::Vec;
+
 use ratatui_core::buffer::Buffer;
 use ratatui_core::layout::{Alignment, Rect};
 use ratatui_core::style::Style;
@@ -65,6 +67,7 @@ impl<'a> BarGroup<'a> {
     ///
     /// BarGroup::default().label(Line::from("Line").red());
     /// ```
+    /// [`String`]: alloc::string::String
     #[must_use = "method moves the value of self and returns the modified value"]
     pub fn label<T: Into<Line<'a>>>(mut self, label: T) -> Self {
         self.label = Some(label.into());

ratatui-widgets/src/block.rs

@@ -6,6 +6,8 @@
 //! [title](Block::title) and [padding](Block::padding).
 #![allow(deprecated)] // to avoid having to add `#[deprecated]` to every use of `Title`
 
+use alloc::vec::Vec;
+
 use itertools::Itertools;
 use ratatui_core::buffer::Buffer;
 use ratatui_core::layout::{Alignment, Rect};
@@ -900,6 +902,8 @@ impl Styled for Block<'_> {
 
 #[cfg(test)]
 mod tests {
+    use alloc::{format, vec};
+
     use ratatui_core::layout::HorizontalAlignment;
     use ratatui_core::style::{Color, Modifier, Stylize};
     use rstest::rstest;

ratatui-widgets/src/block/title.rs

@@ -143,6 +143,8 @@ where
 
 #[cfg(test)]
 mod tests {
+    use alloc::string::ToString;
+
     use rstest::rstest;
     use strum::ParseError;
 

ratatui-widgets/src/borders.rs

@@ -1,5 +1,5 @@
 //! Border related types ([`Borders`], [`BorderType`]) and a macro to create borders ([`border`]).
-use core::fmt;
+use alloc::fmt;
 
 use bitflags::bitflags;
 use ratatui_core::symbols::border;
@@ -254,6 +254,8 @@ macro_rules! border {
 
 #[cfg(test)]
 mod tests {
+    use alloc::format;
+
     use super::*;
 
     #[test]

ratatui-widgets/src/calendar.rs

@@ -8,6 +8,9 @@
 //! * a style is returned by the [`DateStyler`] for the day
 //!
 //! [`Monthly`] has several controls for what should be displayed
+use alloc::format;
+use alloc::vec::Vec;
+
 use hashbrown::HashMap;
 use ratatui_core::buffer::Buffer;
 use ratatui_core::layout::{Alignment, Constraint, Layout, Rect};

ratatui-widgets/src/canvas.rs

@@ -13,6 +13,10 @@
 //!
 //! You can also implement your own custom [`Shape`]s.
 
+use alloc::boxed::Box;
+use alloc::string::String;
+use alloc::vec;
+use alloc::vec::Vec;
 use core::fmt;
 use core::iter::zip;
 

ratatui-widgets/src/canvas/map.rs

@@ -58,6 +58,8 @@ impl Shape for Map {
 
 #[cfg(test)]
 mod tests {
+    use alloc::string::ToString;
+
     use ratatui_core::buffer::Buffer;
     use ratatui_core::layout::Rect;
     use ratatui_core::symbols::Marker;

ratatui-widgets/src/chart.rs

@@ -1,4 +1,5 @@
 //! The [`Chart`] widget is used to plot one or more [`Dataset`] in a cartesian coordinate system.
+use alloc::vec::Vec;
 use core::cmp::max;
 use core::ops::Not;
 
@@ -1155,6 +1156,9 @@ impl Styled for Chart<'_> {
 
 #[cfg(test)]
 mod tests {
+    use alloc::string::ToString;
+    use alloc::{format, vec};
+
     use ratatui_core::style::{Modifier, Stylize};
     use rstest::rstest;
     use strum::ParseError;

ratatui-widgets/src/gauge.rs

@@ -1,4 +1,6 @@
 //! The [`Gauge`] widget is used to display a horizontal progress bar.
+use alloc::format;
+
 use ratatui_core::buffer::Buffer;
 use ratatui_core::layout::Rect;
 use ratatui_core::style::{Color, Style, Styled};

ratatui-widgets/src/lib.rs

@@ -80,6 +80,8 @@
 //!
 //! This project is licensed under the MIT License. See the [LICENSE](../LICENSE) file for details.
 
+#![no_std]
+
 extern crate alloc;
 
 pub mod barchart;

ratatui-widgets/src/list.rs

@@ -1,5 +1,8 @@
 //! The [`List`] widget is used to display a list of items and allows selecting one or multiple
 //! items.
+
+use alloc::vec::Vec;
+
 use ratatui_core::style::{Style, Styled};
 use ratatui_core::text::Line;
 use strum::{Display, EnumString};
@@ -459,6 +462,8 @@ where
 
 #[cfg(test)]
 mod tests {
+    use alloc::{format, vec};
+
     use pretty_assertions::assert_eq;
     use ratatui_core::style::{Color, Modifier, Stylize};
 

ratatui-widgets/src/list/item.rs

@@ -219,6 +219,8 @@ where
 #[cfg(test)]
 mod tests {
     use alloc::borrow::Cow;
+    use alloc::string::{String, ToString};
+    use alloc::vec;
 
     use pretty_assertions::assert_eq;
     use ratatui_core::style::{Color, Modifier, Stylize};

ratatui-widgets/src/list/rendering.rs

@@ -255,6 +255,10 @@ impl List<'_> {
 
 #[cfg(test)]
 mod tests {
+    use alloc::borrow::ToOwned;
+    use alloc::vec;
+    use alloc::vec::Vec;
+
     use pretty_assertions::assert_eq;
     use ratatui_core::layout::{Alignment, Rect};
     use ratatui_core::style::{Color, Modifier, Style, Stylize};

ratatui-widgets/src/mascot.rs

@@ -174,6 +174,7 @@ impl Widget for RatatuiMascot {
 
 #[cfg(test)]
 mod tests {
+    use alloc::string::String;
 
     use super::*;
 

ratatui-widgets/src/paragraph.rs

@@ -493,6 +493,8 @@ impl Styled for Paragraph<'_> {
 
 #[cfg(test)]
 mod tests {
+    use alloc::vec;
+
     use ratatui_core::buffer::Buffer;
     use ratatui_core::layout::{Alignment, Rect};
     use ratatui_core::style::{Color, Modifier, Style, Stylize};

ratatui-widgets/src/reflow.rs

@@ -1,5 +1,7 @@
 //! Internal module for reflowing text to fit into a certain width.
 use alloc::collections::VecDeque;
+use alloc::vec;
+use alloc::vec::Vec;
 use core::mem;
 
 use ratatui_core::layout::Alignment;
@@ -351,6 +353,9 @@ fn trim_offset(src: &str, mut offset: usize) -> &str {
 
 #[cfg(test)]
 mod tests {
+    use alloc::boxed::Box;
+    use alloc::string::String;
+
     use ratatui_core::style::Style;
     use ratatui_core::text::{Line, Text};
 

ratatui-widgets/src/scrollbar.rs

@@ -636,6 +636,8 @@ impl ScrollbarOrientation {
 
 #[cfg(test)]
 mod tests {
+    use alloc::format;
+    use alloc::string::ToString;
     use core::str::FromStr;
 
     use ratatui_core::text::Text;

ratatui-widgets/src/sparkline.rs

@@ -1,4 +1,7 @@
 //! The [`Sparkline`] widget is used to display a sparkline over one or more lines.
+
+use alloc::string::{String, ToString};
+use alloc::vec::Vec;
 use core::cmp::min;
 
 use ratatui_core::buffer::Buffer;
@@ -434,6 +437,8 @@ impl Sparkline<'_> {
 
 #[cfg(test)]
 mod tests {
+    use alloc::vec;
+
     use ratatui_core::buffer::Cell;
     use ratatui_core::style::{Color, Modifier, Stylize};
     use strum::ParseError;

ratatui-widgets/src/table.rs

@@ -1,6 +1,9 @@
 //! The [`Table`] widget is used to display multiple rows and columns in a grid and allows selecting
 //! one or multiple cells.
 
+use alloc::vec;
+use alloc::vec::Vec;
+
 use itertools::Itertools;
 use ratatui_core::buffer::Buffer;
 use ratatui_core::layout::{Constraint, Flex, Layout, Rect};
@@ -1036,7 +1039,8 @@ where
 
 #[cfg(test)]
 mod tests {
-    use alloc::vec;
+    use alloc::string::ToString;
+    use alloc::{format, vec};
 
     use ratatui_core::layout::Constraint::*;
     use ratatui_core::style::{Color, Modifier, Style, Stylize};

ratatui-widgets/src/table/highlight_spacing.rs

@@ -40,6 +40,8 @@ impl HighlightSpacing {
 
 #[cfg(test)]
 mod tests {
+    use alloc::string::ToString;
+
     use super::*;
 
     #[test]

ratatui-widgets/src/table/row.rs

@@ -1,3 +1,5 @@
+use alloc::vec::Vec;
+
 use ratatui_core::style::{Style, Styled};
 
 use super::Cell;

ratatui-widgets/src/tabs.rs

@@ -1,4 +1,6 @@
 //! The [`Tabs`] widget displays a horizontal set of tabs with a single tab selected.
+use alloc::vec::Vec;
+
 use itertools::Itertools;
 use ratatui_core::buffer::Buffer;
 use ratatui_core::layout::Rect;
@@ -122,6 +124,7 @@ impl<'a> Tabs<'a> {
     ///
     /// let tabs = Tabs::new(vec!["Tab 1".red(), "Tab 2".blue()]);
     /// ```
+    /// [`String`]: alloc::string::String
     pub fn new<Iter>(titles: Iter) -> Self
     where
         Iter: IntoIterator,
@@ -444,6 +447,8 @@ where
 
 #[cfg(test)]
 mod tests {
+    use alloc::{format, vec};
+
     use ratatui_core::style::{Color, Stylize};
 
     use super::*;