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LibWeb: Add parent classes for managing GridTrackSizes

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Add classes ExplicitTrackSizing and MetaGridTrackSize which will allow
for managing properties like auto-fill and minmax.

In the following CSS example there are 3 classes that will be used:
grid-template-column: repeat(auto-fill, minmax(50px, 1fr) 75px);

ExplicitTrackSizing - will contain the entire value. e.g.
repeat(auto-fill, minmax(50px, 1fr) 75px)

With a flag if it's a repeat, as well as references to the
MetaGridTrackSizes which is the next step down.

MetaGridTrackSize:
Contain the individual grid track sizes. Here there are two:
minmax(50px, 1fr) as well as 75px.

This way can keep track if it's a minmax function or not, and the
references to both GridTrackSizes in the case it is, or in just the one
if it is not.

GridTrackSize:
Is the most basic element, in this case there are three in total; two of
which are held by the first MetaGridTrackSize, and the third is held by
the second MetaGridTrackSize.
Examples: 50px, 1fr and 75px.
This commit is contained in:
martinfalisse 2022-10-09 19:34:27 +02:00 • committed by Andreas Kling
parent 414a22a386
commit f7af190de0
10 changed files with 144 additions and 54 deletions
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16
Userland/Libraries/LibWeb/Layout/GridFormattingContext.cpp
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@ -57,7 +57,9 @@ void GridFormattingContext::run(Box const& box, LayoutMode, AvailableSpace const
boxes_to_place.append(child_box);
return IterationDecision::Continue;
});
auto occupation_grid = OccupationGrid(static_cast<int>(box.computed_values().grid_template_columns().size()), static_cast<int>(box.computed_values().grid_template_rows().size()));
auto column_repeat_count = box.computed_values().grid_template_columns().is_repeat() ? box.computed_values().grid_template_columns().repeat_count() : 1;
auto row_repeat_count = box.computed_values().grid_template_rows().is_repeat() ? box.computed_values().grid_template_rows().repeat_count() : 1;
auto occupation_grid = OccupationGrid(column_repeat_count * box.computed_values().grid_template_columns().meta_grid_track_sizes().size(), row_repeat_count * box.computed_values().grid_template_rows().meta_grid_track_sizes().size());
// https://drafts.csswg.org/css-grid/#auto-placement-algo
// 8.5. Grid Item Placement Algorithm
@ -521,10 +523,14 @@ void GridFormattingContext::run(Box const& box, LayoutMode, AvailableSpace const
Vector<GridTrack> grid_rows;
Vector<GridTrack> grid_columns;
for (auto& column_size : box.computed_values().grid_template_columns())
grid_columns.append({ column_size, column_size });
for (auto& row_size : box.computed_values().grid_template_rows())
grid_rows.append({ row_size, row_size });
for (int x = 0; x < column_repeat_count; ++x) {
for (auto& meta_grid_track_size : box.computed_values().grid_template_columns().meta_grid_track_sizes())
grid_columns.append({ meta_grid_track_size.min_grid_track_size(), meta_grid_track_size.max_grid_track_size() });
}
for (int x = 0; x < row_repeat_count; ++x) {
for (auto& meta_grid_track_size : box.computed_values().grid_template_rows().meta_grid_track_sizes())
grid_rows.append({ meta_grid_track_size.min_grid_track_size(), meta_grid_track_size.max_grid_track_size() });
}
for (int column_index = grid_columns.size(); column_index < occupation_grid.column_count(); column_index++)
grid_columns.append({ CSS::GridTrackSize::make_auto(), CSS::GridTrackSize::make_auto() });