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Auto pair-removal #2940

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Merged
merged 5 commits into from
Jul 22, 2022
Merged

Auto pair-removal #2940

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55b69fd
auto pair-removal
Jul 2, 2022
e7e591e
autopairs removal: use doc autopairs
Jul 2, 2022
005f4c6
autopairs-removal: limit to one-char selections
Jul 2, 2022
41a8f43
use single_grapheme() to check if range is one char
Jul 10, 2022
9659bbc
fix errouneous deletes of " and other symmetric autopairs when at buf…
Jul 21, 2022
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40 changes: 33 additions & 7 deletions helix-term/src/commands.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2937,14 +2937,18 @@ pub mod insert {

pub fn delete_char_backward(cx: &mut Context) {
let count = cx.count();
let (view, doc) = current!(cx.editor);
let (view, doc) = current_ref!(cx.editor);
let text = doc.text().slice(..);
let indent_unit = doc.indent_unit();
let tab_size = doc.tab_width();
let auto_pairs = doc.auto_pairs(cx.editor);

let transaction =
Transaction::change_by_selection(doc.text(), doc.selection(view.id), |range| {
let pos = range.cursor(text);
if pos == 0 {
return (pos, pos, None);
}
let line_start_pos = text.line_to_char(range.cursor_line(text));
// consider to delete by indent level if all characters before `pos` are indent units.
let fragment = Cow::from(text.slice(line_start_pos..pos));
Expand Down Expand Up @@ -2992,14 +2996,36 @@ pub mod insert {
(start, pos, None) // delete!
}
} else {
// delete char
(
graphemes::nth_prev_grapheme_boundary(text, pos, count),
pos,
None,
)
match (
text.get_char(pos.saturating_sub(1)),
text.get_char(pos),
auto_pairs,
) {
(Some(_x), Some(_y), Some(ap))
if range.is_single_grapheme(text)
&& ap.get(_x).is_some()
&& ap.get(_x).unwrap().close == _y =>
// delete both autopaired characters
{
(
graphemes::nth_prev_grapheme_boundary(text, pos, count),
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This might get a bit tricky with the count. If we just delete n chars in both directions, this will be wrong in some cases. e.g. presently with this case:

hello, "["], goodbye("")

If you hit backspace 3 times, you get

hello[,] goodbye("")

like you'd expect. But if you use the command with a count, e.g. if you bound backspace to this in normal mode and then hit 3<backspace>, you end up with:

hello[g]oodbye("")

Though, I don't know how many people bind this in normal mode and use the count with it, so I don't know if I'd consider this a blocker. It might be tricky to get the logic right.

graphemes::nth_next_grapheme_boundary(text, pos, count),
None,
)
}
_ =>
// delete 1 char
{
(
graphemes::nth_prev_grapheme_boundary(text, pos, count),
pos,
None,
)
}
}
}
});
let (view, doc) = current!(cx.editor);
doc.apply(&transaction, view.id);
}

Expand Down