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layout: Zero out collapsed track sizes when painting collapsed borders (#35165)

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We were painting collapsed borders without taking into account that some
tracks might have been "removed" by `visibility: collapse`.

This just sets the sizes of these tracks to zero. Note this implies that
collapsed borders may overlap each other, or overlap cell contents, but
this seems to match Blink.

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
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Oriol Brufau 2025-01-27 12:40:26 -08:00 • committed by GitHub
parent 38847d4991
commit 7977357a57
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4 changed files with 92 additions and 1 deletions
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14
components/layout_2020/table/layout.rs
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@ -1931,11 +1931,23 @@ impl<'a> TableLayout<'a> {
fn specific_layout_info_for_grid(&mut self) -> Option<SpecificLayoutInfo> {
mem::take(&mut self.collapsed_borders).map(|mut collapsed_borders| {
let writing_mode = self.table.style.writing_mode;
// TODO: It would probably be better to use `TableAndTrackDimensions`, since that
// has already taken care of collapsed tracks and knows the final track positions.
let mut track_sizes = LogicalVec2 {
inline: mem::take(&mut self.distributed_column_widths),
block: mem::take(&mut self.row_sizes),
};
for (column_index, column_size) in track_sizes.inline.iter_mut().enumerate() {
if self.is_column_collapsed(column_index) {
mem::take(column_size);
}
}
for (row_index, row_size) in track_sizes.block.iter_mut().enumerate() {
if self.is_row_collapsed(row_index) {
mem::take(row_size);
}
}
let writing_mode = self.table.style.writing_mode;
if !writing_mode.is_bidi_ltr() {
track_sizes.inline.reverse();
collapsed_borders.inline.reverse();