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- /*
- * Copyright (c) 2022-2023, Martin Falisse <mfalisse@outlook.com>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #pragma once
- #include <LibWeb/CSS/Length.h>
- #include <LibWeb/Layout/FormattingContext.h>
- namespace Web::Layout {
- class OccupationGrid {
- public:
- OccupationGrid(int column_count, int row_count);
- OccupationGrid();
- void maybe_add_column(int needed_number_of_columns);
- void maybe_add_row(int needed_number_of_rows);
- void set_occupied(int column_start, int column_end, int row_start, int row_end);
- void set_occupied(int column_index, int row_index);
- int column_count() { return static_cast<int>(m_occupation_grid[0].size()); }
- int row_count() { return static_cast<int>(m_occupation_grid.size()); }
- bool is_occupied(int column_index, int row_index);
- private:
- Vector<Vector<bool>> m_occupation_grid;
- };
- class GridItem {
- public:
- GridItem(Box const& box, int row, int row_span, int column, int column_span)
- : m_box(box)
- , m_row(row)
- , m_row_span(row_span)
- , m_column(column)
- , m_column_span(column_span)
- {
- }
- Box const& box() const { return m_box; }
- int raw_row_span() { return m_row_span; }
- int raw_column_span() { return m_column_span; }
- int gap_adjusted_row(Box const& parent_box) const;
- int gap_adjusted_column(Box const& parent_box) const;
- private:
- JS::NonnullGCPtr<Box const> m_box;
- int m_row { 0 };
- int m_row_span { 1 };
- int m_column { 0 };
- int m_column_span { 1 };
- };
- class GridFormattingContext final : public FormattingContext {
- public:
- explicit GridFormattingContext(LayoutState&, Box const& grid_container, FormattingContext* parent);
- ~GridFormattingContext();
- virtual void run(Box const&, LayoutMode, AvailableSpace const& available_space) override;
- virtual CSSPixels automatic_content_width() const override;
- virtual CSSPixels automatic_content_height() const override;
- private:
- CSSPixels m_automatic_content_height { 0 };
- bool is_auto_positioned_row(CSS::GridTrackPlacement const&, CSS::GridTrackPlacement const&) const;
- bool is_auto_positioned_column(CSS::GridTrackPlacement const&, CSS::GridTrackPlacement const&) const;
- bool is_auto_positioned_track(CSS::GridTrackPlacement const&, CSS::GridTrackPlacement const&) const;
- struct TemporaryTrack {
- CSS::GridSize min_track_sizing_function;
- CSS::GridSize max_track_sizing_function;
- CSSPixels base_size { 0 };
- CSSPixels growth_limit { 0 };
- CSSPixels space_to_distribute { 0 };
- CSSPixels planned_increase { 0 };
- bool is_gap { false };
- CSSPixels border_left { 0 };
- CSSPixels border_right { 0 };
- CSSPixels border_top { 0 };
- CSSPixels border_bottom { 0 };
- CSSPixels full_horizontal_size() const
- {
- return base_size + border_left + border_right;
- }
- CSSPixels full_vertical_size() const
- {
- return base_size + border_top + border_bottom;
- }
- TemporaryTrack(CSS::GridSize min_track_sizing_function, CSS::GridSize max_track_sizing_function)
- : min_track_sizing_function(min_track_sizing_function)
- , max_track_sizing_function(max_track_sizing_function)
- {
- }
- TemporaryTrack(CSS::GridSize track_sizing_function)
- : min_track_sizing_function(track_sizing_function)
- , max_track_sizing_function(track_sizing_function)
- {
- }
- TemporaryTrack(CSSPixels size, bool is_gap)
- : min_track_sizing_function(CSS::GridSize(CSS::Length::make_px(size)))
- , max_track_sizing_function(CSS::GridSize(CSS::Length::make_px(size)))
- , base_size(size)
- , is_gap(is_gap)
- {
- }
- TemporaryTrack()
- : min_track_sizing_function(CSS::GridSize::make_auto())
- , max_track_sizing_function(CSS::GridSize::make_auto())
- {
- }
- };
- struct GridArea {
- String name;
- int row_start { 0 };
- int row_end { 1 };
- int column_start { 0 };
- int column_end { 1 };
- };
- Vector<GridArea> m_valid_grid_areas;
- Vector<TemporaryTrack> m_grid_rows;
- Vector<TemporaryTrack> m_grid_columns;
- OccupationGrid m_occupation_grid;
- Vector<GridItem> m_grid_items;
- Vector<JS::NonnullGCPtr<Box const>> m_boxes_to_place;
- CSSPixels get_free_space_x(AvailableSpace const& available_space);
- CSSPixels get_free_space_y(Box const&);
- int get_line_index_by_line_name(String const& line_name, CSS::GridTrackSizeList);
- CSSPixels resolve_definite_track_size(CSS::GridSize const&, AvailableSpace const&, Box const&);
- size_t count_of_gap_columns();
- size_t count_of_gap_rows();
- CSSPixels resolve_size(CSS::Size const&, AvailableSize const&, Box const&);
- int count_of_repeated_auto_fill_or_fit_tracks(Vector<CSS::ExplicitGridTrack> const& track_list, AvailableSpace const&, Box const&);
- int get_count_of_tracks(Vector<CSS::ExplicitGridTrack> const&, AvailableSpace const&, Box const&);
- void build_valid_grid_areas(Box const&);
- int find_valid_grid_area(String const& needle);
- void place_item_with_row_and_column_position(Box const& box, Box const& child_box);
- void place_item_with_row_position(Box const& box, Box const& child_box);
- void place_item_with_column_position(Box const& box, Box const& child_box, int& auto_placement_cursor_x, int& auto_placement_cursor_y);
- void place_item_with_no_declared_position(Box const& child_box, int& auto_placement_cursor_x, int& auto_placement_cursor_y);
- void initialize_grid_tracks(Box const&, AvailableSpace const&, int column_count, int row_count);
- void calculate_sizes_of_columns(Box const&, AvailableSpace const&);
- void calculate_sizes_of_rows(Box const&);
- CSSPixels content_based_minimum_height(GridItem const&, Box const& parent_box);
- };
- }
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