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/*
* Copyright (C) 2010 Google, Inc. All Rights Reserved.
* Copyright (C) 2011-2017 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 "PendingScriptClient.h"
#include "Timer.h"
#include <wtf/CheckedRef.h>
#include <wtf/HashSet.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/Vector.h>
#include <wtf/WeakRef.h>
namespace WebCore {
class Document;
class ScriptElement;
class LoadableScript;
class WeakPtrImplWithEventTargetData;
class ScriptRunner final : public PendingScriptClient, public CanMakeCheckedPtr<ScriptRunner> {
WTF_MAKE_TZONE_ALLOCATED(ScriptRunner);
WTF_MAKE_NONCOPYABLE(ScriptRunner);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(ScriptRunner);
public:
explicit ScriptRunner(Document&);
~ScriptRunner();
void ref() const;
void deref() const;
// CheckedPtr interface
uint32_t checkedPtrCount() const final { return CanMakeCheckedPtr::checkedPtrCount(); }
uint32_t checkedPtrCountWithoutThreadCheck() const final { return CanMakeCheckedPtr::checkedPtrCountWithoutThreadCheck(); }
void incrementCheckedPtrCount() const final { CanMakeCheckedPtr::incrementCheckedPtrCount(); }
void decrementCheckedPtrCount() const final { CanMakeCheckedPtr::decrementCheckedPtrCount(); }
enum ExecutionType { ASYNC_EXECUTION, IN_ORDER_EXECUTION };
void queueScriptForExecution(ScriptElement&, LoadableScript&, ExecutionType);
bool hasPendingScripts() const { return !m_scriptsToExecuteSoon.isEmpty() || !m_scriptsToExecuteInOrder.isEmpty() || !m_pendingAsyncScripts.isEmpty(); }
void suspend();
void resume();
void notifyScriptReady(ScriptElement*, ExecutionType);
void didBeginYieldingParser() { suspend(); }
void didEndYieldingParser() { resume(); }
void documentFinishedParsing();
void clearPendingScripts();
private:
void timerFired();
void notifyFinished(PendingScript&) override;
WeakRef<Document, WeakPtrImplWithEventTargetData> m_document;
Vector<Ref<PendingScript>> m_scriptsToExecuteInOrder;
Vector<RefPtr<PendingScript>> m_scriptsToExecuteSoon; // http://www.whatwg.org/specs/web-apps/current-work/#set-of-scripts-that-will-execute-as-soon-as-possible
UncheckedKeyHashSet<Ref<PendingScript>> m_pendingAsyncScripts;
Timer m_timer;
};
}
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