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Improved backspace

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This commit is contained in:
Jeremy Soller 2022-10-19 16:09:22 -06:00
parent ac31fa8284
commit 601547b83d
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GPG key ID: 87F211AF2BE4C2FE
2 changed files with 17 additions and 7 deletions
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20
src/buffer.rs
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@ -473,21 +473,31 @@ impl<'a> TextBuffer<'a> {
text_line.remove(glyph.start);
self.reshape_line(line.line_i);
} else if self.cursor.line > 0 {
self.cursor.glyph = self.layout_lines[self.cursor.line - 1].glyphs.len();
{
let line = &self.layout_lines[self.cursor.line];
let old_line = self.text_lines.remove(line.line_i.get());
self.text_lines[line.line_i.get() - 1].push_str(&old_line);
let prev_line = &self.layout_lines[self.cursor.line - 1];
if prev_line.line_i.get() < line.line_i.get() {
let old_line = self.text_lines.remove(line.line_i.get());
self.text_lines[prev_line.line_i.get()].push_str(&old_line);
} else {
match prev_line.glyphs.last() {
Some(glyph) => {
let text_line = &mut self.text_lines[line.line_i.get()];
text_line.remove(glyph.end);
},
None => (), // There should always be a last glyph
}
}
// Reshape all lines after new line
//TODO: improve performance
self.shape_lines.truncate(line.line_i.get() - 1);
self.shape_lines.truncate(prev_line.line_i.get());
self.relayout();
self.shape_until_scroll();
}
self.cursor.line -= 1;
self.cursor.glyph = self.layout_lines[self.cursor.line].glyphs.len();
let lines = self.lines();
if (self.cursor.line as i32) < self.scroll