d6d097b671
This change makes grid items be responsible for their borders instead of grid tracks which can not have borders itself. There are changes in layout tests but those are improvements :)
228 lines
9 KiB
C++
228 lines
9 KiB
C++
/*
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* Copyright (c) 2022-2023, Martin Falisse <mfalisse@outlook.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/CSS/Length.h>
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#include <LibWeb/Layout/FormattingContext.h>
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namespace Web::Layout {
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enum class GridDimension {
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Row,
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Column
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};
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class OccupationGrid {
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public:
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OccupationGrid(size_t column_count, size_t row_count);
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OccupationGrid();
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void maybe_add_column(size_t needed_number_of_columns);
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void maybe_add_row(size_t needed_number_of_rows);
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void set_occupied(size_t column_start, size_t column_end, size_t row_start, size_t row_end);
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void set_occupied(size_t column_index, size_t row_index);
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size_t column_count() { return m_occupation_grid[0].size(); }
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size_t row_count() { return m_occupation_grid.size(); }
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bool is_occupied(size_t column_index, size_t row_index);
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private:
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Vector<Vector<bool>> m_occupation_grid;
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};
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class GridItem {
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public:
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GridItem(Box const& box, int row, int row_span, int column, int column_span)
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: m_box(box)
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, m_row(row)
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, m_row_span(row_span)
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, m_column(column)
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, m_column_span(column_span)
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{
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m_border_top = box.computed_values().border_top().width;
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m_border_right = box.computed_values().border_right().width;
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m_border_bottom = box.computed_values().border_bottom().width;
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m_border_left = box.computed_values().border_left().width;
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}
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Box const& box() const { return m_box; }
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size_t span(GridDimension const dimension) const
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{
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return dimension == GridDimension::Column ? m_column_span : m_row_span;
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}
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size_t raw_position(GridDimension const dimension) const
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{
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return dimension == GridDimension::Column ? m_column : m_row;
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}
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CSSPixels add_border_box_sizes(CSSPixels content_size, GridDimension dimension) const
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{
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if (dimension == GridDimension::Column) {
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return m_border_left + content_size + m_border_right;
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} else {
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return m_border_top + content_size + m_border_bottom;
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}
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}
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size_t raw_row() const { return m_row; }
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size_t raw_column() const { return m_column; }
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size_t raw_row_span() const { return m_row_span; }
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size_t raw_column_span() const { return m_column_span; }
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size_t gap_adjusted_row(Box const& grid_box) const;
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size_t gap_adjusted_column(Box const& grid_box) const;
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private:
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JS::NonnullGCPtr<Box const> m_box;
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size_t m_row { 0 };
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size_t m_row_span { 1 };
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size_t m_column { 0 };
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size_t m_column_span { 1 };
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CSSPixels m_border_top;
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CSSPixels m_border_right;
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CSSPixels m_border_bottom;
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CSSPixels m_border_left;
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};
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class GridFormattingContext final : public FormattingContext {
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public:
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explicit GridFormattingContext(LayoutState&, Box const& grid_container, FormattingContext* parent);
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~GridFormattingContext();
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virtual void run(Box const&, LayoutMode, AvailableSpace const& available_space) override;
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virtual CSSPixels automatic_content_width() const override;
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virtual CSSPixels automatic_content_height() const override;
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Box const& grid_container() const { return context_box(); }
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private:
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CSSPixels m_automatic_content_height { 0 };
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bool is_auto_positioned_row(CSS::GridTrackPlacement const&, CSS::GridTrackPlacement const&) const;
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bool is_auto_positioned_column(CSS::GridTrackPlacement const&, CSS::GridTrackPlacement const&) const;
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bool is_auto_positioned_track(CSS::GridTrackPlacement const&, CSS::GridTrackPlacement const&) const;
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struct TemporaryTrack {
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CSS::GridSize min_track_sizing_function;
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CSS::GridSize max_track_sizing_function;
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CSSPixels base_size { 0 };
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bool has_definite_base_size { false };
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CSSPixels growth_limit { 0 };
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CSSPixels space_to_distribute { 0 };
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CSSPixels planned_increase { 0 };
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CSSPixels item_incurred_increase { 0 };
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bool frozen { false };
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bool is_gap { false };
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TemporaryTrack(CSS::GridSize min_track_sizing_function, CSS::GridSize max_track_sizing_function)
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: min_track_sizing_function(min_track_sizing_function)
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, max_track_sizing_function(max_track_sizing_function)
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{
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}
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TemporaryTrack(CSS::GridSize track_sizing_function)
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: min_track_sizing_function(track_sizing_function)
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, max_track_sizing_function(track_sizing_function)
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{
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}
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TemporaryTrack(CSSPixels size, bool is_gap)
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: min_track_sizing_function(CSS::GridSize(CSS::Length::make_px(size)))
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, max_track_sizing_function(CSS::GridSize(CSS::Length::make_px(size)))
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, base_size(size)
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, is_gap(is_gap)
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{
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}
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TemporaryTrack()
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: min_track_sizing_function(CSS::GridSize::make_auto())
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, max_track_sizing_function(CSS::GridSize::make_auto())
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{
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}
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};
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struct GridArea {
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String name;
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size_t row_start { 0 };
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size_t row_end { 1 };
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size_t column_start { 0 };
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size_t column_end { 1 };
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};
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Vector<GridArea> m_valid_grid_areas;
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Vector<TemporaryTrack> m_grid_rows;
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Vector<TemporaryTrack> m_grid_columns;
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Vector<TemporaryTrack> m_row_gap_tracks;
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Vector<TemporaryTrack> m_column_gap_tracks;
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Vector<TemporaryTrack&> m_grid_rows_and_gaps;
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Vector<TemporaryTrack&> m_grid_columns_and_gaps;
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OccupationGrid m_occupation_grid;
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Vector<GridItem> m_grid_items;
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Vector<JS::NonnullGCPtr<Box const>> m_boxes_to_place;
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void determine_grid_container_height();
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void determine_intrinsic_size_of_grid_container(AvailableSpace const& available_space);
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AvailableSize get_free_space(AvailableSpace const&, GridDimension const) const;
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int get_line_index_by_line_name(String const& line_name, CSS::GridTrackSizeList);
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CSSPixels resolve_definite_track_size(CSS::GridSize const&, AvailableSpace const&);
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int count_of_repeated_auto_fill_or_fit_tracks(Vector<CSS::ExplicitGridTrack> const& track_list, AvailableSpace const&);
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int get_count_of_tracks(Vector<CSS::ExplicitGridTrack> const&, AvailableSpace const&);
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void build_valid_grid_areas();
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int find_valid_grid_area(String const& needle);
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void place_grid_items(AvailableSpace const& available_space);
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void place_item_with_row_and_column_position(Box const& child_box);
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void place_item_with_row_position(Box const& child_box);
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void place_item_with_column_position(Box const& child_box, int& auto_placement_cursor_x, int& auto_placement_cursor_y);
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void place_item_with_no_declared_position(Box const& child_box, int& auto_placement_cursor_x, int& auto_placement_cursor_y);
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void initialize_grid_tracks_from_definition(AvailableSpace const& available_space, Vector<CSS::ExplicitGridTrack> const& tracks_definition, Vector<TemporaryTrack>& tracks);
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void initialize_grid_tracks_for_columns_and_rows(AvailableSpace const&);
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void initialize_gap_tracks(AvailableSpace const&);
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void initialize_track_sizes(AvailableSpace const&, GridDimension const);
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void resolve_intrinsic_track_sizes(AvailableSpace const&, GridDimension const);
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void distribute_extra_space_across_spanned_tracks(CSSPixels item_size_contribution, Vector<TemporaryTrack&>& spanned_tracks);
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void increase_sizes_to_accommodate_spanning_items_crossing_content_sized_tracks(GridDimension const, size_t span);
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void increase_sizes_to_accommodate_spanning_items_crossing_flexible_tracks(GridDimension const);
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void maximize_tracks(AvailableSpace const&, GridDimension const);
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void expand_flexible_tracks(AvailableSpace const&, GridDimension const);
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void stretch_auto_tracks(AvailableSpace const&, GridDimension const);
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void run_track_sizing(AvailableSpace const&, GridDimension const);
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CSS::Size const& get_item_preferred_size(GridItem const&, GridDimension const) const;
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CSSPixels calculate_min_content_size(GridItem const&, GridDimension const) const;
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CSSPixels calculate_max_content_size(GridItem const&, GridDimension const) const;
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CSSPixels calculate_min_content_contribution(GridItem const&, GridDimension const) const;
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CSSPixels calculate_max_content_contribution(GridItem const&, GridDimension const) const;
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CSSPixels calculate_limited_min_content_contribution(GridItem const&, GridDimension const) const;
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CSSPixels calculate_limited_max_content_contribution(GridItem const&, GridDimension const) const;
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CSSPixels containing_block_size_for_item(GridItem const&, GridDimension const) const;
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AvailableSpace get_available_space_for_item(GridItem const&) const;
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CSS::Size const& get_item_minimum_size(GridItem const&, GridDimension const) const;
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CSSPixels content_size_suggestion(GridItem const&, GridDimension const) const;
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Optional<CSSPixels> specified_size_suggestion(GridItem const&, GridDimension const) const;
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CSSPixels content_based_minimum_size(GridItem const&, GridDimension const) const;
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CSSPixels automatic_minimum_size(GridItem const&, GridDimension const) const;
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CSSPixels calculate_minimum_contribution(GridItem const&, GridDimension const) const;
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};
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}
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