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Track horizontal scroll (which must be implemented by renderers)

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Jeremy Soller 2024-05-30 14:26:38 -06:00
parent 2f5f2c63da
commit 570999809c
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GPG key ID: D02FD439211AF56F
2 changed files with 33 additions and 4 deletions
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23
src/buffer.rs
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@ -373,6 +373,29 @@ impl Buffer {
}
self.shape_until_scroll(font_system, prune);
// Adjust horizontal scroll to include cursor
if let Some(layout_cursor) = self.layout_cursor(font_system, cursor) {
if let Some(layout_lines) = self.line_layout(font_system, layout_cursor.line) {
if let Some(layout_line) = layout_lines.get(layout_cursor.layout) {
if let Some(glyph) = layout_line.glyphs.get(layout_cursor.glyph) {
//TODO: use code from cursor_glyph_opt?
let x_a = glyph.x;
let x_b = glyph.x + glyph.w;
let x_min = x_a.min(x_b);
let x_max = x_a.max(x_b);
if x_min < self.scroll.horizontal {
self.scroll.horizontal = x_min;
self.redraw = true;
}
if x_max > self.scroll.horizontal + self.width {
self.scroll.horizontal = x_max - self.width;
self.redraw = true;
}
}
}
}
}
}
/// Shape lines until scroll