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LibWeb: Layout grid items after calculation

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Now that the positions of each grid item have been calculated, and the
sizes of the individual rows and columns ascertained, can actually
layout the different items.
This commit is contained in:
martinfalisse 2022-09-07 15:49:28 +02:00 • committed by Andreas Kling
parent 58078c1f40
commit 214329b81c
1 changed files with 27 additions and 0 deletions
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27
Userland/Libraries/LibWeb/Layout/GridFormattingContext.cpp
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@ -369,6 +369,10 @@ void GridFormattingContext::run(Box const& box, LayoutMode)
// FIXME: 4.2. For dense packing:
}
for (auto& positioned_box : positioned_boxes) {
(void)layout_inside(positioned_box.box, LayoutMode::Normal);
}
// https://drafts.csswg.org/css-grid/#overview-sizing
// 2.3. Sizing the Grid
// Once the grid items have been placed, the sizes of the grid tracks (rows and columns) are
@ -965,6 +969,29 @@ void GridFormattingContext::run(Box const& box, LayoutMode)
if (grid_row.max_track_sizing_function.is_length() && grid_row.max_track_sizing_function.length().is_auto())
grid_row.base_size = max(grid_row.base_size, remaining_vertical_space / count_of_auto_max_row_tracks);
}
// Do layout
auto layout_box = [&](int row_start, int row_end, int column_start, int column_end, Box const& child_box) -> void {
auto& child_box_state = m_state.get_mutable(child_box);
float x_start = 0;
float x_end = 0;
float y_start = 0;
float y_end = 0;
for (int i = 0; i < column_start; i++)
x_start += grid_columns[i].base_size;
for (int i = 0; i < column_end; i++)
x_end += grid_columns[i].base_size;
for (int i = 0; i < row_start; i++)
y_start += grid_rows[i].base_size;
for (int i = 0; i < row_end; i++)
y_end += grid_rows[i].base_size;
child_box_state.set_content_width(x_end - x_start);
child_box_state.set_content_height(y_end - y_start);
child_box_state.offset = { x_start, y_start };
};
for (auto& positioned_box : positioned_boxes)
layout_box(positioned_box.row, positioned_box.row + positioned_box.row_span, positioned_box.column, positioned_box.column + positioned_box.column_span, positioned_box.box);
}
}