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133 lines
3.7 KiB
Rust
133 lines
3.7 KiB
Rust
use crate::{
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buffer::Buffer,
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layout::Rect,
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style::Style,
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symbols,
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text::{Span, Spans},
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widgets::{Block, Widget},
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};
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/// A widget to display available tabs in a multiple panels context.
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///
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/// # Examples
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///
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/// ```
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/// # use tui::widgets::{Block, Borders, Tabs};
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/// # use tui::style::{Style, Color};
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/// # use tui::text::{Spans};
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/// # use tui::symbols::{DOT};
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/// let titles = ["Tab1", "Tab2", "Tab3", "Tab4"].iter().cloned().map(Spans::from).collect();
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/// Tabs::new(titles)
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/// .block(Block::default().title("Tabs").borders(Borders::ALL))
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/// .style(Style::default().fg(Color::White))
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/// .highlight_style(Style::default().fg(Color::Yellow))
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/// .divider(DOT);
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/// ```
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#[derive(Debug, Clone)]
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pub struct Tabs<'a> {
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/// A block to wrap this widget in if necessary
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block: Option<Block<'a>>,
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/// One title for each tab
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titles: Vec<Spans<'a>>,
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/// The index of the selected tabs
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selected: usize,
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/// The style used to draw the text
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style: Style,
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/// Style to apply to the selected item
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highlight_style: Style,
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/// Tab divider
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divider: Span<'a>,
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}
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impl<'a> Tabs<'a> {
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pub fn new(titles: Vec<Spans<'a>>) -> Tabs<'a> {
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Tabs {
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block: None,
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titles,
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selected: 0,
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style: Default::default(),
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highlight_style: Default::default(),
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divider: Span::raw(symbols::line::VERTICAL),
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}
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}
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pub fn block(mut self, block: Block<'a>) -> Tabs<'a> {
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self.block = Some(block);
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self
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}
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pub fn select(mut self, selected: usize) -> Tabs<'a> {
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self.selected = selected;
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self
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}
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pub fn style(mut self, style: Style) -> Tabs<'a> {
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self.style = style;
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self
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}
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pub fn highlight_style(mut self, style: Style) -> Tabs<'a> {
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self.highlight_style = style;
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self
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}
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pub fn divider<T>(mut self, divider: T) -> Tabs<'a>
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where
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T: Into<Span<'a>>,
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{
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self.divider = divider.into();
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self
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}
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}
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impl<'a> Widget for Tabs<'a> {
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fn render(mut self, area: Rect, buf: &mut Buffer) {
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buf.set_style(area, self.style);
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let tabs_area = match self.block.take() {
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Some(b) => {
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let inner_area = b.inner(area);
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b.render(area, buf);
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inner_area
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}
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None => area,
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};
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if tabs_area.height < 1 {
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return;
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}
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let mut x = tabs_area.left();
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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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let pos = buf.set_spans(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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Rect {
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x,
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y: tabs_area.top(),
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width: pos.0.saturating_sub(x),
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height: 1,
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},
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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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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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}
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fn render_dynamic(self: Box<Self>, area: Rect, buf: &mut Buffer) {
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self.render(area, buf);
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}
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} |