CustomElementReactionQueue.h [plain text]
#pragma once
#include <wtf/Forward.h>
#include <wtf/Noncopyable.h>
#include <wtf/Vector.h>
namespace WebCore {
class CustomElementReactionQueueItem;
class Document;
class Element;
class JSCustomElementInterface;
class QualifiedName;
class CustomElementReactionQueue {
WTF_MAKE_NONCOPYABLE(CustomElementReactionQueue);
public:
CustomElementReactionQueue(JSCustomElementInterface&);
~CustomElementReactionQueue();
static void enqueueElementUpgrade(Element&);
static void enqueueElementUpgradeIfDefined(Element&);
static void enqueueConnectedCallbackIfNeeded(Element&);
static void enqueueDisconnectedCallbackIfNeeded(Element&);
static void enqueueAdoptedCallbackIfNeeded(Element&, Document& oldDocument, Document& newDocument);
static void enqueueAttributeChangedCallbackIfNeeded(Element&, const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue);
static void enqueuePostUpgradeReactions(Element&);
bool observesStyleAttribute() const;
void invokeAll(Element&);
void clear();
private:
Ref<JSCustomElementInterface> m_interface;
Vector<CustomElementReactionQueueItem> m_items;
};
class CustomElementReactionStack {
public:
CustomElementReactionStack()
: m_previousProcessingStack(s_currentProcessingStack)
{
s_currentProcessingStack = this;
}
~CustomElementReactionStack()
{
if (UNLIKELY(m_queue))
processQueue();
s_currentProcessingStack = m_previousProcessingStack;
}
static CustomElementReactionQueue& ensureCurrentQueue(Element&);
static bool hasCurrentProcessingStack() { return s_currentProcessingStack; }
static void processBackupQueue();
private:
class ElementQueue {
public:
void add(Element&);
void invokeAll();
private:
Vector<Ref<Element>> m_elements;
bool m_invoking { false };
};
WEBCORE_EXPORT void processQueue();
static ElementQueue& ensureBackupQueue();
static ElementQueue& backupElementQueue();
ElementQueue* m_queue { nullptr };
CustomElementReactionStack* m_previousProcessingStack;
WEBCORE_EXPORT static CustomElementReactionStack* s_currentProcessingStack;
};
}