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/*
* Copyright (C) 2010 Google, Inc. All Rights Reserved.
* Copyright (C) 2010-2017 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 "PendingScript.h"
#include <wtf/Deque.h>
#include <wtf/text/TextPosition.h>
namespace WebCore {
class Document;
class Frame;
class HTMLScriptRunnerHost;
class ScriptSourceCode;
class HTMLScriptRunner {
WTF_MAKE_FAST_ALLOCATED;
public:
HTMLScriptRunner(Document&, HTMLScriptRunnerHost&);
~HTMLScriptRunner();
void detach();
// Processes the passed in script and any pending scripts if possible.
void execute(Ref<ScriptElement>&&, const TextPosition& scriptStartPosition);
void executeScriptsWaitingForLoad(PendingScript&);
bool hasScriptsWaitingForStylesheets() const { return m_hasScriptsWaitingForStylesheets; }
void executeScriptsWaitingForStylesheets();
bool executeScriptsWaitingForParsing();
bool hasParserBlockingScript() const;
bool isExecutingScript() const { return !!m_scriptNestingLevel; }
private:
Frame* frame() const;
void executePendingScriptAndDispatchEvent(PendingScript&);
void executeParsingBlockingScripts();
void requestParsingBlockingScript(ScriptElement&);
void requestDeferredScript(ScriptElement&);
void runScript(ScriptElement&, const TextPosition& scriptStartPosition);
void watchForLoad(PendingScript&);
void stopWatchingForLoad(PendingScript&);
bool isPendingScriptReady(const PendingScript&);
Document* m_document;
HTMLScriptRunnerHost& m_host;
RefPtr<PendingScript> m_parserBlockingScript;
Deque<Ref<PendingScript>> m_scriptsToExecuteAfterParsing; // http://www.whatwg.org/specs/web-apps/current-work/#list-of-scripts-that-will-execute-when-the-document-has-finished-parsing
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;
};
} // namespace WebCore