Introduces scroll padding, which allows the api user to request that a certain number of ListItems be kept visible above and below the currently selected item while scrolling.
```rust
let list = List::new(items).scroll_padding(1);
```
Fixes: https://github.com/ratatui-org/ratatui/pull/955
This removes conventional commit check for PRs.
Since we use the PR title and description this is useless. It fails a
lot of time and we ignore it.
IMPORTANT NOTE: This does **not** mean Ratatui abandons conventional
commits. This only relates to commits in PRs.
Currently, `f.render_widget("hello world".bold(), area)` works but
`f.render_widget("hello world", area)` doesn't. This PR changes that my
implementing `Widget` for `&str` and `String`. This makes it easier to
render strings with no styles as widgets.
Example usage:
```rust
terminal.draw(|f| f.render_widget("Hello World!", f.size()))?;
```
---------
Co-authored-by: Josh McKinney <joshka@users.noreply.github.com>
This adds the ability to add titles to the top and bottom of a block
without having to use the `Title` struct (which will be removed in a
future release - likely v0.28.0).
Fixes a subtle bug if the title was created from a right aligned Line
and was also right aligned. The title would be rendered one cell too far
to the right.
```rust
Block::bordered()
.title_top(Line::raw("A").left_aligned())
.title_top(Line::raw("B").centered())
.title_top(Line::raw("C").right_aligned())
.title_bottom(Line::raw("D").left_aligned())
.title_bottom(Line::raw("E").centered())
.title_bottom(Line::raw("F").right_aligned())
.render(buffer.area, &mut buffer);
// renders
"┌A─────B─────C┐",
"│ │",
"└D─────E─────F┘",
```
Addresses part of https://github.com/ratatui-org/ratatui/issues/738
<!-- Please read CONTRIBUTING.md before submitting any pull request. -->
Useful for performing some action on all the cells in a particular area.
E.g.,
```rust
fn render(area: Rect, buf: &mut Buffer) {
for position in area.positions() {
buf.get_mut(position.x, position.y).set_symbol("x");
}
}
```
Fixes a regression in 0.26 where buffer::set_line was no longer setting
the style. This was due to the new style field on Line instead of being
stored only in the spans.
Also adds a configuration for just running unit tests to bacon.toml.
ratatui v0.26.0 brought a regression in the List widget, in which the
highlight symbol width was incorrectly calculated - specifically when
the highlight symbol was a multi-char character, e.g. `▶`.
The Widget trait consumes self, which makes it impossible to use in a
boxed context. Previously we implemented the Widget trait for &T, but
this was not enough to render a boxed widget. We now have a new trait
called `WidgetRef` that allows rendering a widget by reference. This
trait is useful when you want to store a reference to one or more
widgets and render them later. Additionaly this makes it possible to
render boxed widgets where the type is not known at compile time (e.g.
in a composite layout with multiple panes of different types).
This change also adds a new trait called `StatefulWidgetRef` which is
the stateful equivalent of `WidgetRef`.
Both new traits are gated behind the `unstable-widget-ref` feature flag
as we may change the exact name / approach a little on this based on
further discussion.
Blanket implementation of `Widget` for `&W` where `W` implements
`WidgetRef` and `StatefulWidget` for `&W` where `W` implements
`StatefulWidgetRef` is provided. This allows you to render a widget by
reference and a stateful widget by reference.
A blanket implementation of `WidgetRef` for `Option<W>` where `W`
implements `WidgetRef` is provided. This makes it easier to render
child widgets that are optional without the boilerplate of unwrapping
the option. Previously several widgets implemented this manually. This
commits expands the pattern to apply to all widgets.
```rust
struct Parent {
child: Option<Child>,
}
impl WidgetRef for Parent {
fn render_ref(&self, area: Rect, buf: &mut Buffer) {
self.child.render_ref(area, buf);
}
}
```
```rust
let widgets: Vec<Box<dyn WidgetRef>> = vec![Box::new(Greeting), Box::new(Farewell)];
for widget in widgets {
widget.render_ref(buf.area, &mut buf);
}
assert_eq!(buf, Buffer::with_lines(["Hello Goodbye"]));
```
In a recent commit we added Rec::split, but this feels more ergonomic as
Layout::areas. This also adds Layout::spacers to get the spacers between
the areas.
This can make it easier to use `Buffer::with_lines` with iterators that
don't necessarily produce a `Vec`. For example, this allows using
`Buffer::with_lines` with `&[&str]` directly, without having to call
`collect` on it first.
This allows iterating over the `Lines`s of a text using `for` loops and
other iterator methods.
- add `iter` and `iter_mut` methods to `Text`
- implement `IntoIterator` for `Text`, `&Text`, and `&mut Text` traits
- update call sites to iterate over `Text` rather than `Text::lines`
This allows iterating over the `Span`s of a line using `for` loops and
other iterator methods.
- add `iter` and `iter_mut` methods to `Line`
- implement `IntoIterator` for `Line`, `&Line`, and `&mut Line` traits
- update call sites to iterate over `Line` rather than `Line::spans`
Here's a constraint explorer demo put together with @joshka
https://github.com/ratatui-org/ratatui/assets/1813121/08d7d8f6-d013-44b4-8331-f4eee3589cce
It allows users to interactive explore how the constraints behave with
respect to each other and compare that across flex modes. It allows
users to swap constraints out for other constraints, increment or
decrement the values, add and remove constraints, and add spacing
It is also a good example for how to structure a simple TUI with several
Ratatui code patterns that are useful for refactoring.
Fixes: https://github.com/ratatui-org/ratatui/issues/792
---------
Co-authored-by: Josh McKinney <joshka@users.noreply.github.com>
Implementation was simplified and calculates the size of the thumb a
bit more proportionally to the content that is visible.
Co-authored-by: Josh McKinney <joshka@users.noreply.github.com>
This PR is a split of reworking the weights from #888
This keeps the same ranking of weights, just uses a different numerical
value so that the lowest weight is `WEAK` (`1.0`).
No tests are changed as a result of this change, and running the
following multiple times did not cause any errors for me:
```rust
for i in {0..100}
do
cargo test --lib --
if [ $? -ne 0 ]; then
echo "Test failed. Exiting loop."
break
fi
done
```
Updates the requirements on [termwiz](https://github.com/wez/wezterm) to
permit the latest version.
<details>
<summary>Commits</summary>
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<li>See full diff in <a
href="https://github.com/wez/wezterm/commits">compare view</a></li>
</ul>
</details>
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This PR makes a number of simplifications to the layout and constraint
features that were added after v0.25.0.
For users upgrading from v0.25.0, the net effect of this PR (along with
the other PRs) is the following:
- New `Flex` modes have been added.
- `Flex::Start` (new default)
- `Flex::Center`
- `Flex::End`
- `Flex::SpaceAround`
- `Flex::SpaceBetween`
- `Flex::Legacy` (old default)
- `Min(v)` grows to allocate excess space in all `Flex` modes instead of
shrinking (except in `Flex::Legacy` where it retains old behavior).
- `Fill(1)` grows to allocate excess space, growing equally with
`Min(v)`.
---
The following contains a summary of the changes in this PR and the
motivation behind them.
**`Flex`**
- Removes `Flex::Stretch`
- Renames `Flex::StretchLast` to `Flex::Legacy`
**`Constraint`**
- Removes `Fixed`
- Makes `Min(v)` grow as much as possible everywhere (except
`Flex::Legacy` where it retains the old behavior)
- Makes `Min(v)` grow equally as `Fill(1)` while respecting `Min` lower
bounds. When `Fill` and `Min` are used together, they both fill excess
space equally.
Allowing `Min(v)` to grow still allows users to build the same layouts
as before with `Flex::Start` with no breaking changes to the behavior.
This PR also removes the unstable feature `SegmentSize`.
This is a breaking change to the behavior of constraints. If users want
old behavior, they can use `Flex::Legacy`.
```rust
Layout::vertical([Length(25), Length(25)]).flex(Flex::Legacy)
```
Users that have constraint that exceed the available space will probably
not see any difference or see an improvement in their layouts. Any
layout with `Min` will be identical in `Flex::Start` and `Flex::Legacy`
so any layout with `Min` will not be breaking.
Previously, `Table` used `EvenDistribution` internally by default, but
with that gone the default is now `Flex::Start`. This changes the
behavior of `Table` (for the better in most cases). The only way for
users to get exactly the same as the old behavior is to change their
constraints. I imagine most users will be happier out of the box with
the new Table default.
Resolves https://github.com/ratatui-org/ratatui/issues/843
Thanks to @joshka for the direction
