Refactor infobox rendering and parsing (#579)
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27616153bc
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14c08e855f
3 changed files with 35 additions and 47 deletions
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@ -145,7 +145,7 @@ impl From<KeyTrieNode> for Info {
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.map(|(desc, keys)| (desc.strip_prefix(&prefix).unwrap(), keys))
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.collect();
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}
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Info::key(node.name(), body)
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Info::new(node.name(), body)
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}
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}
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@ -1,8 +1,8 @@
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use crate::compositor::{Component, Context};
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use helix_view::graphics::Rect;
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use helix_view::graphics::{Margin, Rect};
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use helix_view::info::Info;
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use tui::buffer::Buffer as Surface;
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use tui::widgets::{Block, Borders, Widget};
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use tui::widgets::{Block, Borders, Paragraph, Widget};
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impl Component for Info {
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fn render(&mut self, viewport: Rect, surface: &mut Surface, cx: &mut Context) {
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@ -11,10 +11,11 @@ impl Component for Info {
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// Calculate the area of the terminal to modify. Because we want to
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// render at the bottom right, we use the viewport's width and height
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// which evaluate to the most bottom right coordinate.
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let (width, height) = (self.width + 2, self.height + 2);
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let width = self.width + 2 + 2; // +2 for border, +2 for margin
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let height = self.height + 2; // +2 for border
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let area = viewport.intersection(Rect::new(
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viewport.width.saturating_sub(width),
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viewport.height.saturating_sub(height + 2),
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viewport.height.saturating_sub(height + 2), // +2 for statusline
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width,
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height,
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));
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@ -24,15 +25,14 @@ impl Component for Info {
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.title(self.title.as_str())
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.borders(Borders::ALL)
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.border_style(style);
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let inner = block.inner(area);
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let margin = Margin {
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vertical: 0,
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horizontal: 1,
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};
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let inner = block.inner(area).inner(&margin);
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block.render(area, surface);
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// Only write as many lines as there are rows available.
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for (y, line) in (inner.y..)
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.zip(self.text.lines())
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.take(inner.height as usize)
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{
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surface.set_string(inner.x, y, line, style);
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}
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Paragraph::new(self.text.as_str()).render(inner, surface);
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}
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}
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@ -16,45 +16,33 @@ pub struct Info {
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}
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impl Info {
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// body is a BTreeMap instead of a HashMap because keymaps are represented
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// with nested hashmaps with no ordering, and each invocation of infobox would
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// show different orders of items
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pub fn key(title: &str, body: Vec<(&str, Vec<KeyEvent>)>) -> Info {
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let (lpad, mpad, rpad) = (1, 2, 1);
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let keymaps_width: u16 = body
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.iter()
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.map(|r| r.1.iter().map(|e| e.width() as u16 + 2).sum::<u16>() - 2)
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.max()
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.unwrap();
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pub fn new(title: &str, body: Vec<(&str, Vec<KeyEvent>)>) -> Info {
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let body = body
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.into_iter()
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.map(|(desc, events)| {
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let events = events.iter().map(ToString::to_string).collect::<Vec<_>>();
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(desc, events.join(", "))
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})
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.collect::<Vec<_>>();
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let keymaps_width = body.iter().map(|r| r.1.len()).max().unwrap();
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let mut text = String::new();
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let mut width = 0;
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let height = body.len() as u16;
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for (desc, keyevents) in body {
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let keyevent = keyevents[0];
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let mut left = keymaps_width - keyevent.width() as u16;
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for _ in 0..lpad {
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text.push(' ');
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}
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write!(text, "{}", keyevent).ok();
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for keyevent in &keyevents[1..] {
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write!(text, ", {}", keyevent).ok();
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left -= 2 + keyevent.width() as u16;
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}
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for _ in 0..left + mpad {
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text.push(' ');
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}
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let desc = desc.trim();
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let w = lpad + keymaps_width + mpad + (desc.width() as u16) + rpad;
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if w > width {
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width = w;
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}
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writeln!(text, "{}", desc).ok();
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for (desc, keyevents) in &body {
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let _ = writeln!(
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text,
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"{:width$} {}",
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keyevents,
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desc,
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width = keymaps_width
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);
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}
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Info {
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title: title.to_string(),
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width: text.lines().map(|l| l.width()).max().unwrap() as u16,
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height: body.len() as u16,
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text,
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width,
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height,
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}
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}
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}
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