c9700e100e
This patch adds a map of Layout::Node to FormattingState::NodeState. Instead of updating layout nodes incrementally as layout progresses through the formatting contexts, all updates are now written to the corresponding NodeState instead. At the end of layout, FormattingState::commit() is called, which transfers all the values from the NodeState objects to the Node. This will soon allow us to perform completely non-destructive layouts which don't affect the tree. Note that there are many imperfections here, and still many places where we assign to the NodeState, but later read directly from the Node instead. I'm just committing at this stage to make subsequent diffs easier to understand.
81 lines
2.6 KiB
C++
81 lines
2.6 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://www.w3.org/TR/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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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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const Vector<LineBox>& line_boxes() const { return m_line_boxes; }
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void set_line_boxes(Vector<LineBox>&& line_boxes) { m_line_boxes = move(line_boxes); }
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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_x, int wheel_delta_y) 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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