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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 PendingScript_h
#define PendingScript_h
#include "bindings/core/v8/ScriptStreamer.h"
#include "core/CoreExport.h"
#include "core/fetch/ResourceOwner.h"
#include "core/loader/resource/ScriptResource.h"
#include "platform/MemoryCoordinator.h"
#include "platform/heap/Handle.h"
#include "wtf/Noncopyable.h"
#include "wtf/text/TextPosition.h"
namespace blink {
class Element;
class PendingScript;
class ScriptSourceCode;
class CORE_EXPORT PendingScriptClient : public GarbageCollectedMixin {
public:
virtual ~PendingScriptClient() {}
// Invoked when the pending script has finished loading. This could be during
// |watchForLoad| (if the pending script was already ready), or when the
// resource loads (if script streaming is not occurring), or when script
// streaming finishes.
virtual void pendingScriptFinished(PendingScript*) = 0;
DEFINE_INLINE_VIRTUAL_TRACE() {}
};
// A container for an external script which may be loaded and executed.
//
// TODO(kochi): The comment below is from pre-oilpan age and may not be correct
// now.
// A RefPtr alone does not prevent the underlying Resource from purging its data
// buffer. This class holds a dummy client open for its lifetime in order to
// guarantee that the data buffer will not be purged.
class CORE_EXPORT PendingScript final
: public GarbageCollectedFinalized<PendingScript>,
public ResourceOwner<ScriptResource>,
public MemoryCoordinatorClient {
USING_GARBAGE_COLLECTED_MIXIN(PendingScript);
USING_PRE_FINALIZER(PendingScript, dispose);
WTF_MAKE_NONCOPYABLE(PendingScript);
public:
static PendingScript* create(Element*, ScriptResource*);
~PendingScript() override;
TextPosition startingPosition() const { return m_startingPosition; }
void setStartingPosition(const TextPosition& position) {
m_startingPosition = position;
}
void markParserBlockingLoadStartTime();
// Returns the time the load of this script started blocking the parser, or
// zero if this script hasn't yet blocked the parser, in
// monotonicallyIncreasingTime.
double parserBlockingLoadStartTime() const {
return m_parserBlockingLoadStartTime;
}
void watchForLoad(PendingScriptClient*);
void stopWatchingForLoad();
Element* element() const { return m_element.get(); }
void setElement(Element*);
void setScriptResource(ScriptResource*);
DECLARE_TRACE();
ScriptSourceCode getSource(const KURL& documentURL,
bool& errorOccurred) const;
void setStreamer(ScriptStreamer*);
void streamingFinished();
bool isReady() const;
bool errorOccurred() const;
void dispose();
private:
PendingScript(Element*, ScriptResource*);
PendingScript() = delete;
// ScriptResourceClient
void notifyFinished(Resource*) override;
String debugName() const override { return "PendingScript"; }
void notifyAppendData(ScriptResource*) override;
// MemoryCoordinatorClient
void onMemoryStateChange(MemoryState) override;
bool m_watchingForLoad;
Member<Element> m_element;
TextPosition m_startingPosition; // Only used for inline script tags.
bool m_integrityFailure;
double m_parserBlockingLoadStartTime;
Member<ScriptStreamer> m_streamer;
Member<PendingScriptClient> m_client;
};
} // namespace blink
#endif // PendingScript_h
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