RenderTreeUpdater.h [plain text]
#pragma once
#include "RenderTreePosition.h"
#include "StyleChange.h"
#include "StyleUpdate.h"
#include <wtf/HashSet.h>
#include <wtf/Vector.h>
namespace WebCore {
class ContainerNode;
class Document;
class Element;
class Node;
class RenderStyle;
class Text;
class RenderTreeUpdater {
public:
RenderTreeUpdater(Document&);
~RenderTreeUpdater();
void commit(std::unique_ptr<const Style::Update>);
static void tearDownRenderers(Element&);
static void tearDownRenderer(Text&);
class FirstLetter;
class ListItem;
private:
class GeneratedContent;
class MultiColumn;
void updateRenderTree(ContainerNode& root);
void updateTextRenderer(Text&, const Style::TextUpdate*);
void updateElementRenderer(Element&, const Style::ElementUpdate&);
void createRenderer(Element&, RenderStyle&&);
void updateBeforeDescendants(Element&, const Style::ElementUpdates*);
void updateAfterDescendants(Element&, const Style::ElementUpdates*);
bool textRendererIsNeeded(const Text& textNode);
void storePreviousRenderer(Node&);
struct Parent {
Element* element { nullptr };
const Style::ElementUpdates* updates { nullptr };
std::optional<RenderTreePosition> renderTreePosition;
bool didCreateOrDestroyChildRenderer { false };
RenderObject* previousChildRenderer { nullptr };
Parent(ContainerNode& root);
Parent(Element&, const Style::ElementUpdates*);
};
Parent& parent() { return m_parentStack.last(); }
Parent& renderingParent();
RenderTreePosition& renderTreePosition();
GeneratedContent& generatedContent() { return *m_generatedContent; }
void pushParent(Element&, const Style::ElementUpdates*);
void popParent();
void popParentsToDepth(unsigned depth);
enum class TeardownType { Full, RendererUpdate, RendererUpdateCancelingAnimations };
static void tearDownRenderers(Element&, TeardownType);
static void tearDownTextRenderer(Text&);
static void tearDownLeftoverShadowHostChildren(Element&);
RenderView& renderView();
Document& m_document;
std::unique_ptr<const Style::Update> m_styleUpdate;
Vector<Parent> m_parentStack;
std::unique_ptr<GeneratedContent> m_generatedContent;
};
}