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26 #ifndef PendingScript_h
27 #define PendingScript_h
29 #include "core/dom/Element.h"
30 #include "core/fetch/ResourceClient.h"
31 #include "core/fetch/ResourceOwner.h"
32 #include "core/fetch/ScriptResource.h"
33 #include "platform/heap/Handle.h"
34 #include "wtf/PassRefPtr.h"
35 #include "wtf/RefPtr.h"
36 #include "wtf/text/TextPosition.h"
40 class ScriptSourceCode;
43 // A container for an external script which may be loaded and executed.
45 // A ResourcePtr alone does not prevent the underlying Resource
46 // from purging its data buffer. This class holds a dummy client open for its
47 // lifetime in order to guarantee that the data buffer will not be purged.
48 class PendingScript FINAL : public ResourceOwner<ScriptResource> {
49 ALLOW_ONLY_INLINE_ALLOCATION();
58 : m_watchingForLoad(false)
59 , m_startingPosition(TextPosition::belowRangePosition())
63 PendingScript(Element* element, ScriptResource* resource)
64 : m_watchingForLoad(false)
67 setScriptResource(resource);
70 PendingScript(const PendingScript& other)
71 : ResourceOwner(other)
72 , m_watchingForLoad(other.m_watchingForLoad)
73 , m_element(other.m_element)
74 , m_startingPosition(other.m_startingPosition)
75 , m_streamer(other.m_streamer)
77 setScriptResource(other.resource());
82 PendingScript& operator=(const PendingScript& other)
87 m_watchingForLoad = other.m_watchingForLoad;
88 m_element = other.m_element;
89 m_startingPosition = other.m_startingPosition;
90 m_streamer = other.m_streamer;
91 this->ResourceOwner<ScriptResource, ScriptResourceClient>::operator=(other);
95 TextPosition startingPosition() const { return m_startingPosition; }
96 void setStartingPosition(const TextPosition& position) { m_startingPosition = position; }
98 void watchForLoad(ScriptResourceClient*);
99 void stopWatchingForLoad(ScriptResourceClient*);
101 Element* element() const { return m_element.get(); }
102 void setElement(Element* element) { m_element = element; }
103 PassRefPtrWillBeRawPtr<Element> releaseElementAndClear();
105 void setScriptResource(ScriptResource*);
107 virtual void notifyFinished(Resource*);
108 virtual void notifyAppendData(ScriptResource*);
110 void trace(Visitor*);
112 ScriptSourceCode getSource(const KURL& documentURL, bool& errorOccurred) const;
114 void setStreamer(PassRefPtr<ScriptStreamer> streamer)
117 ASSERT(!m_watchingForLoad);
118 m_streamer = streamer;
121 bool isReady() const;
124 bool m_watchingForLoad;
125 RefPtrWillBeMember<Element> m_element;
126 TextPosition m_startingPosition; // Only used for inline script tags.
128 RefPtr<ScriptStreamer> m_streamer;