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/*
* Copyright (C) 2010 Google, 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.
*/
#ifndef HTMLScriptRunner_h
#define HTMLScriptRunner_h
#include "PendingScript.h"
#include <wtf/Noncopyable.h>
#include <wtf/PassRefPtr.h>
namespace WebCore {
class CachedResource;
class CachedScript;
class Document;
class Element;
class Frame;
class HTMLScriptRunnerHost;
class ScriptSourceCode;
class HTMLScriptRunner : public Noncopyable {
public:
HTMLScriptRunner(Document*, HTMLScriptRunnerHost*);
~HTMLScriptRunner();
// Processes the passed in script and any pending scripts if possible.
bool execute(PassRefPtr<Element> scriptToProcess, int scriptStartLine);
bool executeScriptsWaitingForLoad(CachedResource*);
bool hasScriptsWaitingForStylesheets() const { return m_hasScriptsWaitingForStylesheets; }
bool executeScriptsWaitingForStylesheets();
bool isExecutingScript() const { return !!m_scriptNestingLevel; }
private:
Frame* frame() const;
void executeParsingBlockingScript();
void executePendingScriptAndDispatchEvent(PendingScript&);
void executeScript(Element*, const ScriptSourceCode&) const;
bool haveParsingBlockingScript() const;
bool executeParsingBlockingScripts();
void requestParsingBlockingScript(Element*);
bool requestPendingScript(PendingScript&, Element*) const;
void runScript(Element*, int startingLineNumber);
// Helpers for dealing with HTMLScriptRunnerHost
void watchForLoad(PendingScript&);
void stopWatchingForLoad(PendingScript&);
bool isPendingScriptReady(const PendingScript&);
ScriptSourceCode sourceFromPendingScript(const PendingScript&, bool& errorOccurred) const;
Document* m_document;
HTMLScriptRunnerHost* m_host;
PendingScript m_parsingBlockingScript;
unsigned m_scriptNestingLevel;
// We only want stylesheet loads to trigger script execution if script
// execution is currently stopped due to stylesheet loads, otherwise we'd
// cause nested script execution when parsing <style> tags since </style>
// tags can cause Document to call executeScriptsWaitingForStylesheets.
bool m_hasScriptsWaitingForStylesheets;
};
}
#endif
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