5566d7349b
Add footer_height method to PanelContent trait with default 0. Implement footer_height in FormulaContent to return 1 when in FormulaEdit mode. Update Panel::render to subtract footer height from item height. This enables optional footers in panels. Co-Authored-By: fiddlerwoaroof/git-smart-commit (bartowski/nvidia_Nemotron-Cascade-2-30B-A3B-GGUF)
88 lines
2.8 KiB
Rust
88 lines
2.8 KiB
Rust
use ratatui::{
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buffer::Buffer,
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layout::Rect,
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style::{Color, Style},
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widgets::{Block, Borders, Widget},
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};
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use crate::ui::app::AppMode;
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/// Trait for panel-specific content. Implement this to create a new side panel.
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pub trait PanelContent {
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/// Whether the panel should appear active given the current mode.
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fn is_active(&self, mode: &AppMode) -> bool;
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/// Color used for the active border AND the selection highlight background.
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fn active_color(&self) -> Color;
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/// Block title string (include surrounding spaces for padding).
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fn title(&self) -> &str;
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/// Number of renderable rows.
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fn item_count(&self) -> usize;
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/// Message shown when `item_count()` returns 0.
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fn empty_message(&self) -> &str;
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/// Render a single item at the given row index.
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/// `inner` is the full inner area of the panel; the item occupies row `index`.
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fn render_item(&self, index: usize, is_selected: bool, inner: Rect, buf: &mut Buffer);
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/// Number of lines the footer occupies (used to reserve space).
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fn footer_height(&self) -> u16 {
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0
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}
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/// Optional footer rendered in the reserved space at the bottom.
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fn render_footer(&self, _inner: Rect, _buf: &mut Buffer) {}
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}
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/// Generic side-panel widget that delegates content rendering to a `PanelContent` impl.
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pub struct Panel<'a, C: PanelContent> {
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content: C,
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mode: &'a AppMode,
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cursor: usize,
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}
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impl<'a, C: PanelContent> Panel<'a, C> {
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pub fn new(content: C, mode: &'a AppMode, cursor: usize) -> Self {
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Self {
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content,
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mode,
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cursor,
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}
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}
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}
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impl<C: PanelContent> Widget for Panel<'_, C> {
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fn render(self, area: Rect, buf: &mut Buffer) {
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let is_active = self.content.is_active(self.mode);
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let border_style = if is_active {
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Style::default().fg(self.content.active_color())
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} else {
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Style::default().fg(Color::DarkGray)
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};
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let block = Block::default()
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.borders(Borders::ALL)
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.border_style(border_style)
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.title(self.content.title());
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let inner = block.inner(area);
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block.render(area, buf);
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if self.content.item_count() == 0 {
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buf.set_string(
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inner.x,
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inner.y,
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self.content.empty_message(),
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Style::default().fg(Color::DarkGray),
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);
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return;
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}
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let item_height = inner.height.saturating_sub(self.content.footer_height());
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for i in 0..self.content.item_count() {
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if i as u16 >= item_height {
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break;
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}
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let is_selected = i == self.cursor && is_active;
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self.content.render_item(i, is_selected, inner, buf);
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}
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self.content.render_footer(inner, buf);
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}
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}
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