d49bcf0060
Implement `WhichKey` popup to show available command completions. - Added `format_key_label` to convert `KeyCode` to human-readable strings. - Added `binding_hints` to `Keymap` to extract available commands for a given prefix. - Added `src/ui/which_key.rs` for the widget implementation. - Updated `src/ui/mod.rs` to export the new module. Co-Authored-By: fiddlerwoaroof/git-smart-commit (unsloth/gemma-4-26B-A4B-it-GGUF:UD-Q5_K_XL)
68 lines
2.2 KiB
Rust
68 lines
2.2 KiB
Rust
use ratatui::{
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buffer::Buffer,
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layout::Rect,
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style::{Color, Modifier, Style},
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widgets::{Block, Borders, Clear, Widget},
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};
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/// A compact popup showing available key completions after a prefix key,
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/// Emacs which-key style.
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pub struct WhichKeyWidget<'a> {
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hints: &'a [(String, &'static str)],
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}
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impl<'a> WhichKeyWidget<'a> {
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pub fn new(hints: &'a [(String, &'static str)]) -> Self {
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Self { hints }
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}
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}
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impl Widget for WhichKeyWidget<'_> {
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fn render(self, area: Rect, buf: &mut Buffer) {
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if self.hints.is_empty() {
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return;
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}
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// Size: width fits the longest "key command" line, height = hint count + border
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let content_width = self
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.hints
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.iter()
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.map(|(k, cmd)| k.len() + 2 + cmd.len())
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.max()
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.unwrap_or(10);
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let popup_w = (content_width as u16 + 4).min(area.width); // +4 for border + padding
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let popup_h = (self.hints.len() as u16 + 2).min(area.height); // +2 for border
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// Position: bottom-center, above the status bar
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let x = area.x + area.width.saturating_sub(popup_w) / 2;
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let y = area.y + area.height.saturating_sub(popup_h + 2); // 2 lines above bottom
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let popup_area = Rect::new(x, y, popup_w, popup_h);
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Clear.render(popup_area, buf);
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let block = Block::default()
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.borders(Borders::ALL)
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.border_style(Style::default().fg(Color::DarkGray))
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.title(" which-key ");
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let inner = block.inner(popup_area);
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block.render(popup_area, buf);
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let key_style = Style::default()
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.fg(Color::Cyan)
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.add_modifier(Modifier::BOLD);
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let cmd_style = Style::default().fg(Color::Gray);
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for (i, (key_label, cmd_name)) in self.hints.iter().enumerate() {
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if i >= inner.height as usize {
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break;
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}
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let y = inner.y + i as u16;
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buf.set_string(inner.x + 1, y, key_label, key_style);
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let cmd_x = inner.x + 4; // fixed column for command names
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if cmd_x < inner.x + inner.width {
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buf.set_string(cmd_x, y, cmd_name, cmd_style);
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}
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}
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}
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}
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