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Auto pair-removal (#2940)

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* auto pair-removal

Fixes https://github.com/helix-editor/helix/issues/1673

* autopairs removal: use doc autopairs

* autopairs-removal: limit to one-char selections

* use single_grapheme() to check if range is one char

* fix errouneous deletes of " and other symmetric autopairs when at buffer start

Co-authored-by: Houkime <>
This commit is contained in:
Houkime 2022-07-22 01:23:52 +00:00 • committed by GitHub
parent 19b7864062
commit 52bb1103f8
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 33 additions and 7 deletions
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40
helix-term/src/commands.rs
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@ -3056,14 +3056,18 @@ 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));
@ -3111,14 +3115,36 @@ 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),
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);
lsp::signature_help_impl(cx, SignatureHelpInvoked::Automatic);