749e3f0f30
Since LayoutText always inherits style, it shouldn't store any style of its own. This patch adds a LayoutNodeWithStyle class to sit between LayoutNode and everyone who wants to inherit from LayoutNode except LayoutText :^) Since LayoutText can never have children, we also know that the parent of any LayoutNode is always going to be a LayoutNodeWithStyle. So this patch makes LayoutNode::parent() return LayoutNodeWithStyle*.
121 lines
3.1 KiB
C++
121 lines
3.1 KiB
C++
#pragma once
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#include <AK/NonnullRefPtr.h>
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#include <AK/Vector.h>
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#include <LibDraw/Rect.h>
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#include <LibHTML/CSS/StyleProperties.h>
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#include <LibHTML/Layout/BoxModelMetrics.h>
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#include <LibHTML/RenderingContext.h>
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#include <LibHTML/TreeNode.h>
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class Document;
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class Element;
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class LayoutBlock;
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class LayoutNode;
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class LayoutNodeWithStyle;
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class LineBoxFragment;
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class Node;
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struct HitTestResult {
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RefPtr<LayoutNode> layout_node;
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};
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class LayoutNode : public TreeNode<LayoutNode> {
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public:
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virtual ~LayoutNode();
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const Rect& rect() const { return m_rect; }
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Rect& rect() { return m_rect; }
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void set_rect(const Rect& rect) { m_rect = rect; }
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BoxModelMetrics& box_model() { return m_box_metrics; }
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const BoxModelMetrics& box_model() const { return m_box_metrics; }
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virtual HitTestResult hit_test(const Point&) const;
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bool is_anonymous() const { return !m_node; }
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const Node* node() const { return m_node; }
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const Document& document() const;
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template<typename Callback>
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inline void for_each_child(Callback callback) const
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{
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for (auto* node = first_child(); node; node = node->next_sibling())
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callback(*node);
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}
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template<typename Callback>
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inline void for_each_child(Callback callback)
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{
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for (auto* node = first_child(); node; node = node->next_sibling())
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callback(*node);
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}
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virtual const char* class_name() const { return "LayoutNode"; }
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virtual bool is_text() const { return false; }
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virtual bool is_block() const { return false; }
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virtual bool is_replaced() const { return false; }
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bool is_inline() const { return m_inline; }
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void set_inline(bool b) { m_inline = b; }
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virtual void layout();
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virtual void render(RenderingContext&);
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const LayoutBlock* containing_block() const;
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virtual LayoutNode& inline_wrapper() { return *this; }
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const StyleProperties& style() const;
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const LayoutNodeWithStyle* parent() const;
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void inserted_into(LayoutNode&) {}
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void removed_from(LayoutNode&) {}
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virtual void split_into_lines(LayoutBlock& container);
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protected:
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explicit LayoutNode(const Node*);
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private:
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friend class LayoutNodeWithStyle;
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const Node* m_node { nullptr };
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BoxModelMetrics m_box_metrics;
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Rect m_rect;
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bool m_inline { false };
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bool m_has_style { false };
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};
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class LayoutNodeWithStyle : public LayoutNode {
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public:
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virtual ~LayoutNodeWithStyle() override {}
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const StyleProperties& style() const { return m_style; }
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protected:
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explicit LayoutNodeWithStyle(const Node* node, NonnullRefPtr<StyleProperties> style)
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: LayoutNode(node)
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, m_style(move(style))
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{
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m_has_style = true;
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}
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private:
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NonnullRefPtr<StyleProperties> m_style;
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};
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inline const StyleProperties& LayoutNode::style() const
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{
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if (m_has_style)
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return static_cast<const LayoutNodeWithStyle*>(this)->style();
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return parent()->style();
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}
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inline const LayoutNodeWithStyle* LayoutNode::parent() const
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{
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return static_cast<const LayoutNodeWithStyle*>(TreeNode<LayoutNode>::parent());
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}
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