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Implement 'visibility: collapse' on table parts (#32333)

Browse source 
https://drafts.csswg.org/css2/#dynamic-effects

Co-authored-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Oriol Brufau 2024-05-21 20:02:53 +02:00 • committed by GitHub
parent add18db67e
commit 5d5ac4ec64
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23 changed files with 64 additions and 100 deletions
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83
components/layout_2020/table/layout.rs
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@ -8,9 +8,10 @@ use app_units::{Au, MAX_AU};
use log::warn;
use servo_arc::Arc;
use style::computed_values::border_collapse::T as BorderCollapse;
use style::computed_values::box_sizing::T as BoxSizing;
use style::computed_values::empty_cells::T as EmptyCells;
use style::computed_values::visibility::T as Visibility;
use style::logical_geometry::WritingMode;
use style::properties::longhands::box_sizing::computed_value::T as BoxSizing;
use style::properties::longhands::empty_cells::computed_value::T as EmptyCells;
use style::properties::ComputedValues;
use style::values::computed::{
CSSPixelLength, Length, LengthPercentage as ComputedLengthPercentage, Percentage,
@ -1480,6 +1481,27 @@ impl<'a> TableLayout<'a> {
let mut row_group_fragment_layout = None;
for row_index in 0..self.table.size.height {
// From <https://drafts.csswg.org/css-align-3/#baseline-export>
// > If any cells in the row participate in first baseline/last baseline alignment along
// > the inline axis, the first/last baseline set of the row is generated from their
// > shared alignment baseline and the row’s first available font, after alignment has
// > been performed. Otherwise, the first/last baseline set of the row is synthesized from
// > the lowest and highest content edges of the cells in the row. [CSS2]
//
// If any cell below has baseline alignment, these values will be overwritten,
// but they are initialized to the content edge of the first row.
if row_index == 0 {
let row_end = table_and_track_dimensions
.get_row_rect(0)
.max_block_position();
baselines.first = Some(row_end);
baselines.last = Some(row_end);
}
if self.is_row_collapsed(row_index) {
continue;
}
let table_row = &self.table.rows[row_index];
let mut row_fragment_layout =
RowFragmentLayout::new(table_row, row_index, &table_and_track_dimensions);
@ -1507,26 +1529,13 @@ impl<'a> TableLayout<'a> {
}
}
// From <https://drafts.csswg.org/css-align-3/#baseline-export>
// > If any cells in the row participate in first baseline/last baseline alignment along
// > the inline axis, the first/last baseline set of the row is generated from their
// > shared alignment baseline and the row’s first available font, after alignment has
// > been performed. Otherwise, the first/last baseline set of the row is synthesized from
// > the lowest and highest content edges of the cells in the row. [CSS2]
//
// If any cell below has baseline alignment, these values will be overwritten,
// but they are initialized to the content edge of the first row.
if row_index == 0 {
let row_end = table_and_track_dimensions
.get_row_rect(0)
.max_block_position();
baselines.first = Some(row_end);
baselines.last = Some(row_end);
}
let column_indices = 0..self.table.size.width;
row_fragment_layout.fragments.reserve(self.table.size.width);
for column_index in column_indices {
if self.is_column_collapsed(column_index) {
continue;
}
// The PositioningContext for cells is, in order or preference, the PositioningContext of the row,
// the PositioningContext of the row group, or the PositioningContext of the table.
let row_group_positioning_context = row_group_fragment_layout
@ -1580,6 +1589,34 @@ impl<'a> TableLayout<'a> {
}
}
fn is_row_collapsed(&self, row_index: usize) -> bool {
let Some(row) = &self.table.rows.get(row_index) else {
return false;
};
if row.style.get_inherited_box().visibility == Visibility::Collapse {
return true;
}
let row_group = match row.group_index {
Some(group_index) => &self.table.row_groups[group_index],
None => return false,
};
row_group.style.get_inherited_box().visibility == Visibility::Collapse
}
fn is_column_collapsed(&self, column_index: usize) -> bool {
let Some(col) = &self.table.columns.get(column_index) else {
return false;
};
if col.style.get_inherited_box().visibility == Visibility::Collapse {
return true;
}
let col_group = match col.group_index {
Some(group_index) => &self.table.column_groups[group_index],
None => return false,
};
col_group.style.get_inherited_box().visibility == Visibility::Collapse
}
#[allow(clippy::too_many_arguments)]
fn do_final_cell_layout(
&mut self,
@ -1913,6 +1950,10 @@ impl TableAndTrackDimensions {
border_spacing.inline
};
for column_index in 0..table_layout.table.size.width {
if table_layout.is_column_collapsed(column_index) {
column_dimensions.push((column_offset, column_offset));
continue;
}
let column_size = table_layout.distributed_column_widths[column_index];
column_dimensions.push((column_offset, column_offset + column_size));
column_offset += column_size + border_spacing.inline;
@ -1925,6 +1966,10 @@ impl TableAndTrackDimensions {
border_spacing.block
};
for row_index in 0..table_layout.table.size.height {
if table_layout.is_row_collapsed(row_index) {
row_dimensions.push((row_offset, row_offset));
continue;
}
let row_size = table_layout.row_sizes[row_index];
row_dimensions.push((row_offset, row_offset + row_size));
row_offset += row_size + border_spacing.block;