f73aa8e2bd
Per the spec, only a BlockContainer" can have line boxes, so let's not clutter up every Layout::Box with line boxes. This also allows us to establish an invariant that BFC and IFC always operate on a Layout::BlockContainer. Note that if BlockContainer has all block-level children, its line boxes are not used for anything. They are only used in the all inline-level children scenario.
85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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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/Layout/Box.h>
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#include <LibWeb/Layout/LineBox.h>
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namespace Web::Layout {
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// https://drafts.csswg.org/css-display/#block-container
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class BlockContainer : public Box {
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public:
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BlockContainer(DOM::Document&, DOM::Node*, NonnullRefPtr<CSS::StyleProperties>);
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BlockContainer(DOM::Document&, DOM::Node*, CSS::ComputedValues);
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virtual ~BlockContainer() override;
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virtual void paint(PaintContext&, PaintPhase) override;
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virtual HitTestResult hit_test(const Gfx::IntPoint&, HitTestType) const override;
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BlockContainer* previous_sibling() { return verify_cast<BlockContainer>(Node::previous_sibling()); }
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const BlockContainer* previous_sibling() const { return verify_cast<BlockContainer>(Node::previous_sibling()); }
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BlockContainer* next_sibling() { return verify_cast<BlockContainer>(Node::next_sibling()); }
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const BlockContainer* next_sibling() const { return verify_cast<BlockContainer>(Node::next_sibling()); }
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template<typename Callback>
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void for_each_fragment(Callback);
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template<typename Callback>
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void for_each_fragment(Callback) const;
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virtual void split_into_lines(InlineFormattingContext&, LayoutMode) override;
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bool is_scrollable() const;
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const Gfx::FloatPoint& scroll_offset() const { return m_scroll_offset; }
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void set_scroll_offset(const Gfx::FloatPoint&);
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Vector<LineBox>& line_boxes() { return m_line_boxes; }
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const Vector<LineBox>& line_boxes() const { return m_line_boxes; }
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LineBox& ensure_last_line_box();
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LineBox& add_line_box();
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protected:
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Vector<LineBox> m_line_boxes;
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private:
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virtual bool is_block_container() const final { return true; }
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virtual bool wants_mouse_events() const override { return false; }
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virtual bool handle_mousewheel(Badge<EventHandler>, const Gfx::IntPoint&, unsigned buttons, unsigned modifiers, int wheel_delta) override;
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bool should_clip_overflow() const;
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Gfx::FloatPoint m_scroll_offset;
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};
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template<>
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inline bool Node::fast_is<BlockContainer>() const { return is_block_container(); }
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template<typename Callback>
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void BlockContainer::for_each_fragment(Callback callback)
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{
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for (auto& line_box : line_boxes()) {
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for (auto& fragment : line_box.fragments()) {
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if (callback(fragment) == IterationDecision::Break)
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return;
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}
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}
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}
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template<typename Callback>
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void BlockContainer::for_each_fragment(Callback callback) const
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{
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for (auto& line_box : line_boxes()) {
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for (auto& fragment : line_box.fragments()) {
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if (callback(fragment) == IterationDecision::Break)
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return;
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}
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}
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}
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}
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