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/*
* Copyright (C) 2015, 2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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;
};
}
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