Reland of Split PendingScript into PendingScript and ClassicPendingScript

third_party/WebKit/Source/core/dom/PendingScript.h

 /*
  * 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
@@ skipping 10 matching lines @@
  * 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/dom/Script.h"
 #include "core/dom/ScriptElementBase.h"
-#include "core/loader/resource/ScriptResource.h"
-#include "platform/MemoryCoordinator.h"
 #include "platform/heap/Handle.h"
-#include "platform/loader/fetch/ResourceOwner.h"
-#include "wtf/Noncopyable.h"
+#include "platform/weborigin/KURL.h"
 #include "wtf/text/TextPosition.h"
 
 namespace blink {
 
+class Document;
 class PendingScript;
-class ClassicScript;
+class Script;
 
 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);
+class CORE_EXPORT PendingScript
+    : public GarbageCollectedFinalized<PendingScript> {
   USING_PRE_FINALIZER(PendingScript, dispose);
   WTF_MAKE_NONCOPYABLE(PendingScript);
 
  public:
-  // For script from an external file.
-  static PendingScript* create(ScriptElementBase*, ScriptResource*);
-  // For inline script.
-  static PendingScript* create(ScriptElementBase*, const TextPosition&);
-
-  static PendingScript* createForTesting(ScriptResource*);
-
-  ~PendingScript() override;
+  virtual ~PendingScript();
 
   TextPosition startingPosition() const { return m_startingPosition; }
   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();
 
   ScriptElementBase* element() const;
 
-  DECLARE_TRACE();
+  virtual ScriptType scriptType() const = 0;
 
-  ClassicScript* getSource(const KURL& documentURL, bool& errorOccurred) const;
+  DECLARE_VIRTUAL_TRACE();
 
-  void setStreamer(ScriptStreamer*);
-  void streamingFinished();
+  virtual Script* getSource(const KURL& documentURL,
+                            bool& errorOccurred) const = 0;
+  virtual bool isReady() const = 0;
+  virtual KURL url() const = 0;
+  virtual bool isExternal() const = 0;
+  virtual bool errorOccurred() const = 0;
+  virtual bool wasCanceled() const = 0;
+  virtual void startStreamingIfPossible(Document*, ScriptStreamer::Type) = 0;
 
-  bool isReady() const;
-  bool errorOccurred() const;
-
-  void startStreamingIfPossible(Document*, ScriptStreamer::Type);
   void dispose();
 
+ protected:
+  PendingScript(ScriptElementBase*, const TextPosition& startingPosition);
+
+  virtual void disposeInternal() = 0;
+
+  PendingScriptClient* client() { return m_client; }
+  bool isWatchingForLoad() const { return m_watchingForLoad; }
+
+  virtual void checkState() const = 0;
+
  private:
-  PendingScript(ScriptElementBase*,
-                ScriptResource*,
-                const TextPosition&,
-                bool isForTesting = false);
-  PendingScript() = delete;
-
-  void checkState() const;
-
-  // ScriptResourceClient
-  void notifyFinished(Resource*) override;
-  String debugName() const override { return "PendingScript"; }
-  void notifyAppendData(ScriptResource*) override;
-
-  // MemoryCoordinatorClient
-  void onPurgeMemory() override;
-
   bool m_watchingForLoad;
 
   // |m_element| must points to the corresponding ScriptLoader's
   // ScriptElementBase and thus must be non-null before dispose() is called
   // (except for unit tests).
   Member<ScriptElementBase> 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;
-
-  // This flag is used to skip non-null checks of |m_element| in unit
-  // tests, because |m_element| can be null in unit tests.
-  const bool m_isForTesting;
 };
 
 }  // namespace blink
 
 #endif  // PendingScript_h