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|
use crate::compositor::{Component, Compositor, Context, EventResult};
use crossterm::event::{Event, KeyCode, KeyEvent, KeyModifiers};
use tui::buffer::Buffer as Surface;
use tui::{
layout::Rect,
style::{Color, Style},
widgets::{Block, Borders},
};
use std::borrow::Cow;
use helix_core::Position;
use helix_view::Editor;
// TODO: share logic with Menu, it's essentially Popup(render_fn), but render fn needs to return
// a width/height hint. maybe Popup(Box<Component>)
pub struct Popup {
contents: Box<dyn Component>,
position: Option<Position>,
}
impl Popup {
// TODO: it's like a slimmed down picker, share code? (picker = menu + prompt with different
// rendering)
pub fn new(contents: Box<dyn Component>) -> Self {
Self {
contents,
position: None,
}
}
pub fn set_position(&mut self, pos: Option<Position>) {
self.position = pos;
}
}
impl Component for Popup {
fn handle_event(&mut self, event: Event, cx: &mut Context) -> EventResult {
let key = match event {
Event::Key(event) => event,
_ => return EventResult::Ignored,
};
let close_fn = EventResult::Consumed(Some(Box::new(
|compositor: &mut Compositor, editor: &mut Editor| {
// remove the layer
compositor.pop();
},
)));
match key {
// esc or ctrl-c aborts the completion and closes the menu
KeyEvent {
code: KeyCode::Esc, ..
}
| KeyEvent {
code: KeyCode::Char('c'),
modifiers: KeyModifiers::CONTROL,
} => close_fn,
_ => self.contents.handle_event(event, cx),
}
// for some events, we want to process them but send ignore, specifically all input except
// tab/enter/ctrl-k or whatever will confirm the selection/ ctrl-n/ctrl-p for scroll.
}
fn render(&self, viewport: Rect, surface: &mut Surface, cx: &mut Context) {
use tui::text::Text;
use tui::widgets::{Paragraph, Widget, Wrap};
let position = self
.position
.or_else(|| cx.editor.cursor_position())
.unwrap_or_default();
let (width, height) = self
.contents
.size_hint(viewport)
.expect("Component needs size_hint implemented in order to be embedded in a popup");
let width = width.min(150) as u16;
let height = height.min(13) as u16;
// -- make sure frame doesn't stick out of bounds
let mut rel_x = position.col as u16;
let mut rel_y = position.row as u16;
if viewport.width <= rel_x + width {
rel_x -= ((rel_x + width) - viewport.width)
};
// TODO: be able to specify orientation preference. We want above for most popups, below
// for menus/autocomplete.
if height <= rel_y {
rel_y -= height // position above point
} else {
rel_y += 1 // position below point
}
let area = Rect::new(rel_x, rel_y, width, height);
// clip to viewport
let area = viewport.intersection(Rect::new(rel_x, rel_y, width, height));
// clear area
let background = cx.editor.theme.get("ui.popup");
for y in area.top()..area.bottom() {
for x in area.left()..area.right() {
let cell = surface.get_mut(x, y);
cell.reset();
// cell.symbol.clear();
cell.set_style(background);
}
}
self.contents.render(area, surface, cx);
}
}
|
