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Fix tab highlight when tab is partially visible #3313

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merged 3 commits into from
Aug 6, 2022
Merged

Fix tab highlight when tab is partially visible #3313

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7e7fb20
Fix tab highlight when tab is partially visible
A-Walrus Aug 3, 2022
6c09daf
Make it style based, and not truncation based
A-Walrus Aug 3, 2022
0fd2140
Inline style calculation into branches
A-Walrus Aug 5, 2022
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19 changes: 19 additions & 0 deletions helix-term/src/ui/editor.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -530,6 +530,8 @@ impl EditorView {
(grapheme.as_ref(), width)
};

let cut_off_start = offset.col.saturating_sub(visual_x as usize);

if !out_of_bounds {
// if we're offscreen just keep going until we hit a new line
surface.set_string(
Expand All @@ -542,7 +544,24 @@ impl EditorView {
style
},
);
} else if cut_off_start != 0 && cut_off_start < width {
// partially on screen
let rect = Rect::new(
viewport.x as u16,
viewport.y + line,
(width - cut_off_start) as u16,
1,
);
Comment on lines +549 to +554
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Testing this out with something non-whitespace-like but multi-width like "😀", we render an empty space instead of any character (because of the rect here). I think that's a good choice but I wonder if there's anything better to signal that a multi-width character is getting chopped off here?

I would say … but then we're rendering something completely different than the actual source. Maybe the plain rect is the best choice? ¯\_(ツ)_/¯

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I considered rendering a character to indicate that a wide grapheme has been cut off, but I think keeping it simple and showing nothing is the right approach.
If we were to render a character it should probably be configurable which char to use, (like how it is with whitespace) but I think that's overkill.

surface.set_style(
rect,
if is_whitespace {
style.patch(whitespace_style)
} else {
style
},
);
}

if is_in_indent_area && !(grapheme == " " || grapheme == "\t") {
draw_indent_guides(visual_x, line, surface);
is_in_indent_area = false;
Expand Down