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feat: smart delete leading whitespace to indent_size

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Also and some commentary to the smart_delete_backwards code.

closes #245
This commit is contained in:
CJ van den Berg 2025-07-03 10:26:11 +02:00
parent c6d59c1472
commit 43d6bc66f4
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
1 changed files with 31 additions and 15 deletions
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46
src/tui/editor.zig
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@ -2946,30 +2946,46 @@ pub const Editor = struct {
for (self.cursels.items) |*cursel_| if (cursel_.*) |*cursel| {
if (cursel.selection) |_| {
// just delete selection
root = self.delete_selection(root, cursel, b.allocator) catch continue;
all_stop = false;
continue;
}
// detect indentation
const first = find_first_non_ws(root, cursel.cursor.row, self.metrics);
// select char to the left
with_selection_const(root, move_cursor_left, cursel, self.metrics) catch continue;
// if we don't have a selection after move_cursor_left there is nothing to delete
if (cursel.selection) |*sel| {
const egc_left, _, _ = sel.end.egc_at(root, self.metrics) catch {
root = self.delete_selection(root, cursel, b.allocator) catch continue;
all_stop = false;
continue;
};
const egc_right, _, _ = sel.begin.egc_at(root, self.metrics) catch {
root = self.delete_selection(root, cursel, b.allocator) catch continue;
all_stop = false;
continue;
};
if (first > sel.end.col) {
// we are inside leading whitespace
// select to next indentation boundary
while (sel.end.col > 0 and sel.end.col % self.indent_size != 0)
with_selection_const(root, move_cursor_left, cursel, self.metrics) catch break;
} else {
// char being deleted
const egc_left, _, _ = sel.end.egc_at(root, self.metrics) catch {
root = self.delete_selection(root, cursel, b.allocator) catch continue;
all_stop = false;
continue;
};
// char to the right of char being deleted
const egc_right, _, _ = sel.begin.egc_at(root, self.metrics) catch {
root = self.delete_selection(root, cursel, b.allocator) catch continue;
all_stop = false;
continue;
};
for (Buffer.unicode.char_pairs) |pair| if (std.mem.eql(u8, egc_left, pair[0]) and std.mem.eql(u8, egc_right, pair[1])) {
sel.begin.move_right(root, self.metrics) catch {};
break;
};
// if left char is a smart pair left char, also delete smart pair right char
for (Buffer.unicode.char_pairs) |pair| if (std.mem.eql(u8, egc_left, pair[0]) and std.mem.eql(u8, egc_right, pair[1])) {
sel.begin.move_right(root, self.metrics) catch {};
break;
};
}
}
root = self.delete_selection(root, cursel, b.allocator) catch continue;
all_stop = false;
};