Highlight matching text in file picker suggestions (#1635)
* Highlight matching text in file picker suggestions * Remove cache, specialize highlighting code * Fix outdated comments
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parent
b13d44156c
commit
59c691d2db
3 changed files with 84 additions and 30 deletions
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@ -688,12 +688,12 @@ impl EditorView {
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surface.set_string_truncated(
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viewport.x + 8, // 8: 1 space + 3 char mode string + 1 space + 1 spinner + 1 space
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viewport.y,
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title,
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&title,
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viewport
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.width
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.saturating_sub(6)
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.saturating_sub(right_side_text.width() as u16 + 1) as usize, // "+ 1": a space between the title and the selection info
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base_style,
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|_| base_style,
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true,
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true,
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);
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@ -24,7 +24,7 @@ use crate::ui::{Prompt, PromptEvent};
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use helix_core::{movement::Direction, Position};
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use helix_view::{
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editor::Action,
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graphics::{Color, CursorKind, Margin, Rect, Style},
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graphics::{Color, CursorKind, Margin, Modifier, Rect, Style},
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Document, Editor,
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};
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@ -343,7 +343,7 @@ impl<T> Picker<T> {
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}
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// TODO: maybe using format_fn isn't the best idea here
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let text = (self.format_fn)(option);
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// TODO: using fuzzy_indices could give us the char idx for match highlighting
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// Highlight indices are computed lazily in the render function
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self.matcher
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.fuzzy_match(&text, pattern)
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.map(|score| (index, score))
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@ -483,6 +483,8 @@ impl<T: 'static> Component for Picker<T> {
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fn render(&mut self, area: Rect, surface: &mut Surface, cx: &mut Context) {
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let text_style = cx.editor.theme.get("ui.text");
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let selected = cx.editor.theme.get("ui.text.focus");
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let highlighted = cx.editor.theme.get("special").add_modifier(Modifier::BOLD);
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// -- Render the frame:
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// clear area
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@ -525,29 +527,41 @@ impl<T: 'static> Component for Picker<T> {
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// subtract area of prompt from top and current item marker " > " from left
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let inner = inner.clip_top(2).clip_left(3);
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let selected = cx.editor.theme.get("ui.text.focus");
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let rows = inner.height;
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let offset = self.cursor - (self.cursor % std::cmp::max(1, rows as usize));
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let files = self.matches.iter().skip(offset).map(|(index, _score)| {
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(index, self.options.get(*index).unwrap()) // get_unchecked
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});
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let files = self
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.matches
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.iter_mut()
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.skip(offset)
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.map(|(index, _score)| (*index, self.options.get(*index).unwrap()));
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for (i, (_index, option)) in files.take(rows as usize).enumerate() {
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if i == (self.cursor - offset) {
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let is_active = i == (self.cursor - offset);
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if is_active {
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surface.set_string(inner.x.saturating_sub(2), inner.y + i as u16, ">", selected);
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}
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let formatted = (self.format_fn)(option);
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let (_score, highlights) = self
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.matcher
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.fuzzy_indices(&formatted, &self.prompt.line)
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.unwrap_or_default();
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surface.set_string_truncated(
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inner.x,
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inner.y + i as u16,
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(self.format_fn)(option),
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&formatted,
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inner.width as usize,
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if i == (self.cursor - offset) {
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selected
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} else {
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text_style
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|idx| {
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if highlights.contains(&idx) {
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highlighted
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} else if is_active {
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selected
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} else {
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text_style
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}
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},
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true,
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self.truncate_start,
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@ -287,7 +287,7 @@ impl Buffer {
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where
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S: AsRef<str>,
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{
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self.set_string_truncated(x, y, string, width, style, false, false)
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self.set_string_truncated_at_end(x, y, string.as_ref(), width, style)
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}
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/// Print at most the first `width` characters of a string if enough space is available
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@ -295,19 +295,16 @@ impl Buffer {
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/// truncated lines. If `truncate_start` is `true`, truncate the beginning of the string
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/// instead of the end.
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#[allow(clippy::too_many_arguments)]
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pub fn set_string_truncated<S>(
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pub fn set_string_truncated(
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&mut self,
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x: u16,
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y: u16,
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string: S,
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string: &str,
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width: usize,
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style: Style,
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style: impl Fn(usize) -> Style, // Map a grapheme's string offset to a style
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ellipsis: bool,
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truncate_start: bool,
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) -> (u16, u16)
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where
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S: AsRef<str>,
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{
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) -> (u16, u16) {
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// prevent panic if out of range
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if !self.in_bounds(x, y) || width == 0 {
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return (x, y);
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@ -316,10 +313,10 @@ impl Buffer {
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let mut index = self.index_of(x, y);
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let mut x_offset = x as usize;
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let width = if ellipsis { width - 1 } else { width };
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let graphemes = UnicodeSegmentation::graphemes(string.as_ref(), true);
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let graphemes = string.grapheme_indices(true);
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let max_offset = min(self.area.right() as usize, width.saturating_add(x as usize));
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if !truncate_start {
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for s in graphemes {
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for (byte_offset, s) in graphemes {
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let width = s.width();
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if width == 0 {
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continue;
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@ -331,7 +328,7 @@ impl Buffer {
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}
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self.content[index].set_symbol(s);
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self.content[index].set_style(style);
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self.content[index].set_style(style(byte_offset));
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// Reset following cells if multi-width (they would be hidden by the grapheme),
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for i in index + 1..index + width {
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self.content[i].reset();
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@ -339,14 +336,14 @@ impl Buffer {
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index += width;
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x_offset += width;
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}
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if ellipsis && x_offset - (x as usize) < string.as_ref().width() {
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if ellipsis && x_offset - (x as usize) < string.width() {
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self.content[index].set_symbol("…");
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}
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} else {
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let mut start_index = self.index_of(x, y);
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let mut index = self.index_of(max_offset as u16, y);
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let total_width = string.as_ref().width();
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let total_width = string.width();
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let truncated = total_width > width;
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if ellipsis && truncated {
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self.content[start_index].set_symbol("…");
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@ -355,7 +352,7 @@ impl Buffer {
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if !truncated {
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index -= width - total_width;
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}
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for s in graphemes.rev() {
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for (byte_offset, s) in graphemes.rev() {
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let width = s.width();
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if width == 0 {
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continue;
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@ -365,7 +362,7 @@ impl Buffer {
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break;
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}
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self.content[start].set_symbol(s);
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self.content[start].set_style(style);
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self.content[start].set_style(style(byte_offset));
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for i in start + 1..index {
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self.content[i].reset();
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}
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@ -375,6 +372,49 @@ impl Buffer {
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(x_offset as u16, y)
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}
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/// Print at most the first `width` characters of a string if enough space is available
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/// until the end of the line.
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pub fn set_string_truncated_at_end(
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&mut self,
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x: u16,
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y: u16,
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string: &str,
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width: usize,
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style: Style,
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) -> (u16, u16) {
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// prevent panic if out of range
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if !self.in_bounds(x, y) {
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return (x, y);
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}
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let mut index = self.index_of(x, y);
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let mut x_offset = x as usize;
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let max_x_offset = min(self.area.right() as usize, width.saturating_add(x as usize));
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for s in string.graphemes(true) {
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let width = s.width();
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if width == 0 {
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continue;
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}
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// `x_offset + width > max_offset` could be integer overflow on 32-bit machines if we
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// change dimensions to usize or u32 and someone resizes the terminal to 1x2^32.
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if width > max_x_offset.saturating_sub(x_offset) {
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break;
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}
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self.content[index].set_symbol(s);
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self.content[index].set_style(style);
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// Reset following cells if multi-width (they would be hidden by the grapheme),
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for i in index + 1..index + width {
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self.content[i].reset();
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}
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index += width;
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x_offset += width;
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}
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(x_offset as u16, y)
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}
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pub fn set_spans<'a>(&mut self, x: u16, y: u16, spans: &Spans<'a>, width: u16) -> (u16, u16) {
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let mut remaining_width = width;
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let mut x = x;
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