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https://github.com/ratatui-org/ratatui
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fix(tabs): Tab widget now supports custom padding (#629)
The Tab widget now contains padding_left and and padding_right properties. Those values can be set with functions `padding_left()`, `padding_right()`, and `padding()` whic all accept `Into<Line>`. Fixes issue https://github.com/ratatui-org/ratatui/issues/502
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1 changed files with 118 additions and 6 deletions
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@ -12,7 +12,9 @@ use crate::{
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///
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/// Each tab title is stored as a [`Line`] which can be individually styled. The selected tab is set
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/// using [`Tabs::select`] and styled using [`Tabs::highlight_style`]. The divider can be customized
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/// with [`Tabs::divider`].
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/// with [`Tabs::divider`]. Padding can be set with [`Tabs::padding`] or [`Tabs::left_padding`] and [`Tabs::right_padding`].
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///
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/// The divider defaults to |, and padding defaults to a singular space on each side.
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///
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/// # Example
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///
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@ -24,7 +26,8 @@ use crate::{
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/// .style(Style::default().white())
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/// .highlight_style(Style::default().yellow())
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/// .select(2)
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/// .divider(symbols::DOT);
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/// .divider(symbols::DOT)
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/// .padding("->", "<-");
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/// ```
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#[derive(Debug, Default, Clone, Eq, PartialEq, Hash)]
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pub struct Tabs<'a> {
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@ -40,6 +43,10 @@ pub struct Tabs<'a> {
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highlight_style: Style,
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/// Tab divider
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divider: Span<'a>,
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/// Tab Left Padding
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padding_left: Line<'a>,
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/// Tab Right Padding
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padding_right: Line<'a>,
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}
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impl<'a> Tabs<'a> {
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@ -72,6 +79,8 @@ impl<'a> Tabs<'a> {
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style: Style::default(),
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highlight_style: Style::default(),
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divider: Span::raw(symbols::line::VERTICAL),
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padding_left: Line::from(" "),
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padding_right: Line::from(" "),
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}
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}
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@ -83,7 +92,7 @@ impl<'a> Tabs<'a> {
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/// Sets the selected tab.
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///
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/// The first tab has index 0 (this is also the default index).
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/// The first tab has index 0 (this is also the default index).
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/// The selected tab can have a different style with [`Tabs::highlight_style`].
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pub fn select(mut self, selected: usize) -> Tabs<'a> {
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self.selected = selected;
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@ -121,7 +130,7 @@ impl<'a> Tabs<'a> {
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/// ```
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/// Use dash (`-`) as separator.
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/// ```
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/// # use ratatui::{prelude::*, widgets::Tabs, symbols};
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/// # use ratatui::{prelude::*, widgets::Tabs};
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/// let tabs = Tabs::new(vec!["Tab 1", "Tab 2"]).divider("-");
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/// ```
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pub fn divider<T>(mut self, divider: T) -> Tabs<'a>
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@ -131,6 +140,70 @@ impl<'a> Tabs<'a> {
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self.divider = divider.into();
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self
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}
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/// Sets the padding between tabs.
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///
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/// Both default to space.
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///
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/// # Examples
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///
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/// A space on either side of the tabs.
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/// ```
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/// # use ratatui::{prelude::*, widgets::Tabs};
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/// let tabs = Tabs::new(vec!["Tab 1", "Tab 2"]).padding(" ", " ");
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/// ```
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/// Nothing on either side of the tabs.
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/// ```
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/// # use ratatui::{prelude::*, widgets::Tabs};
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/// let tabs = Tabs::new(vec!["Tab 1", "Tab 2"]).padding("", "");
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/// ```
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pub fn padding<T, U>(mut self, left: T, right: U) -> Tabs<'a>
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where
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T: Into<Line<'a>>,
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U: Into<Line<'a>>,
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{
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self.padding_left = left.into();
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self.padding_right = right.into();
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self
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}
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/// Sets the left side padding between tabs.
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///
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/// Defaults to a space.
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///
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/// # Example
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///
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/// An arrow on the left of tabs.
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/// ```
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/// # use ratatui::{prelude::*, widgets::Tabs};
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/// let tabs = Tabs::new(vec!["Tab 1", "Tab 2"]).padding_left("->");
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/// ```
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pub fn padding_left<T>(mut self, padding: T) -> Tabs<'a>
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where
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T: Into<Line<'a>>,
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{
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self.padding_left = padding.into();
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self
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}
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/// Sets the right side padding between tabs.
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///
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/// Defaults to a space.
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///
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/// # Example
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///
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/// An arrow on the right of tabs.
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/// ```
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/// # use ratatui::{prelude::*, widgets::Tabs};
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/// let tabs = Tabs::new(vec!["Tab 1", "Tab 2"]).padding_right("<-");
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/// ```
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pub fn padding_right<T>(mut self, padding: T) -> Tabs<'a>
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where
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T: Into<Line<'a>>,
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{
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self.padding_left = padding.into();
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self
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}
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}
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impl<'a> Styled for Tabs<'a> {
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@ -165,11 +238,21 @@ impl<'a> Widget for Tabs<'a> {
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let titles_length = self.titles.len();
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for (i, title) in self.titles.into_iter().enumerate() {
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let last_title = titles_length - 1 == i;
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x = x.saturating_add(1);
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let remaining_width = tabs_area.right().saturating_sub(x);
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if remaining_width == 0 {
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break;
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}
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// Left Padding
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let pos = buf.set_line(x, tabs_area.top(), &self.padding_left, remaining_width);
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x = pos.0;
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let remaining_width = tabs_area.right().saturating_sub(x);
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if remaining_width == 0 {
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break;
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}
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// Title
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let pos = buf.set_line(x, tabs_area.top(), &title, remaining_width);
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if i == self.selected {
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buf.set_style(
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@ -182,11 +265,20 @@ impl<'a> Widget for Tabs<'a> {
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self.highlight_style,
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);
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}
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x = pos.0.saturating_add(1);
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x = pos.0;
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let remaining_width = tabs_area.right().saturating_sub(x);
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if remaining_width == 0 {
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break;
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}
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// Right Padding
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let pos = buf.set_line(x, tabs_area.top(), &self.padding_right, remaining_width);
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x = pos.0;
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let remaining_width = tabs_area.right().saturating_sub(x);
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if remaining_width == 0 || last_title {
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break;
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}
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let pos = buf.set_span(x, tabs_area.top(), &self.divider, remaining_width);
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x = pos.0;
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}
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@ -216,6 +308,8 @@ mod tests {
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style: Style::default(),
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highlight_style: Style::default(),
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divider: Span::raw(symbols::line::VERTICAL),
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padding_right: Line::from(" "),
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padding_left: Line::from(" "),
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}
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);
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}
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@ -235,6 +329,24 @@ mod tests {
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);
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}
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#[test]
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fn render_no_padding() {
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let tabs = Tabs::new(vec!["Tab1", "Tab2", "Tab3", "Tab4"]).padding("", "");
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assert_buffer_eq!(
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render(tabs, Rect::new(0, 0, 30, 1)),
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Buffer::with_lines(vec!["Tab1│Tab2│Tab3│Tab4 "])
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);
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}
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#[test]
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fn render_more_padding() {
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let tabs = Tabs::new(vec!["Tab1", "Tab2", "Tab3", "Tab4"]).padding(" ", " ");
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assert_buffer_eq!(
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render(tabs, Rect::new(0, 0, 30, 1)),
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Buffer::with_lines(vec![" Tab1 │ Tab2 │ Tab3 │"])
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);
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}
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#[test]
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fn render_with_block() {
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let tabs = Tabs::new(vec!["Tab1", "Tab2", "Tab3", "Tab4"])
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