120 lines
4.6 KiB
C++
120 lines
4.6 KiB
C++
/*
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* Copyright (c) 2022, 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/BlockFormattingContext.h>
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#include <LibWeb/Layout/Box.h>
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#include <LibWeb/Layout/FormattingContext.h>
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namespace Web::Layout {
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class OccupationGrid {
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public:
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OccupationGrid(int column_count, int row_count);
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OccupationGrid();
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void maybe_add_column(int needed_number_of_columns);
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void maybe_add_row(int needed_number_of_rows);
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void set_occupied(int column_start, int column_end, int row_start, int row_end);
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void set_occupied(int column_index, int row_index);
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int column_count() { return static_cast<int>(m_occupation_grid[0].size()); }
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int row_count() { return static_cast<int>(m_occupation_grid.size()); }
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bool is_occupied(int column_index, int 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 GridFormattingContext final : public BlockFormattingContext {
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public:
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explicit GridFormattingContext(LayoutState&, BlockContainer const&, 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_height() const override;
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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 PositionedBox {
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Box const& box;
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int row { 0 };
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int row_span { 1 };
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int column { 0 };
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int column_span { 1 };
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};
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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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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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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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Vector<TemporaryTrack> m_grid_rows;
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Vector<TemporaryTrack> m_grid_columns;
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OccupationGrid m_occupation_grid;
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Vector<PositionedBox> m_positioned_boxes;
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Vector<Box const&> m_boxes_to_place;
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CSSPixels get_free_space_x(AvailableSpace const& available_space);
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CSSPixels get_free_space_y(Box 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&, Box const&);
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size_t count_of_gap_columns();
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size_t count_of_gap_rows();
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CSSPixels resolve_size(CSS::Size const&, AvailableSize const&, Box const&);
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int count_of_repeated_auto_fill_or_fit_tracks(Vector<CSS::ExplicitGridTrack> const& track_list, AvailableSpace const&, Box const&);
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int get_count_of_tracks(Vector<CSS::ExplicitGridTrack> const&, AvailableSpace const&, Box const&);
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void place_item_with_row_and_column_position(Box const& box, Box const& child_box);
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void place_item_with_row_position(Box const& box, Box const& child_box);
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void place_item_with_column_position(Box const& box, 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(Box const&, AvailableSpace const&, int column_count, int row_count);
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void calculate_sizes_of_columns(Box const&, AvailableSpace const&);
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void calculate_sizes_of_rows(Box const&);
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};
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}
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