Reland of Split PendingScript into PendingScript and ClassicPendingScript

third_party/WebKit/Source/core/dom/ClassicPendingScript.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
- *    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.
- */
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
-#ifndef PendingScript_h
-#define PendingScript_h
+#ifndef ClassicPendingScript_h
+#define ClassicPendingScript_h
 
 #include "bindings/core/v8/ScriptStreamer.h"
-#include "core/CoreExport.h"
-#include "core/dom/ScriptElementBase.h"
+#include "core/dom/ClassicScript.h"
+#include "core/dom/PendingScript.h"
 #include "core/loader/resource/ScriptResource.h"
 #include "platform/MemoryCoordinator.h"
-#include "platform/heap/Handle.h"
 #include "platform/loader/fetch/ResourceOwner.h"
-#include "platform/wtf/Noncopyable.h"
-#include "platform/wtf/text/TextPosition.h"
 
 namespace blink {
 
-class PendingScript;
-class ClassicScript;
-
-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.
+// PendingScript for a classic script
+// https://html.spec.whatwg.org/#classic-script.
 //
 // 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>,
+class CORE_EXPORT ClassicPendingScript final
+    : public PendingScript,
       public ResourceOwner<ScriptResource>,
       public MemoryCoordinatorClient {
-  USING_GARBAGE_COLLECTED_MIXIN(PendingScript);
-  USING_PRE_FINALIZER(PendingScript, Dispose);
-  WTF_MAKE_NONCOPYABLE(PendingScript);
+  USING_GARBAGE_COLLECTED_MIXIN(ClassicPendingScript);
+
+  // In order to call Dispose() before ResourceOwner's prefinalizer, we
+  // also register ClassicPendingScript::Dispose() as the prefinalizer of
+  // ClassicPendingScript here. https://crbug.com/711703
+  USING_PRE_FINALIZER(ClassicPendingScript, Dispose);
 
  public:
   // For script from an external file.
-  static PendingScript* Create(ScriptElementBase*, ScriptResource*);
+  static ClassicPendingScript* Create(ScriptElementBase*, ScriptResource*);
   // For inline script.
-  static PendingScript* Create(ScriptElementBase*, const TextPosition&);
+  static ClassicPendingScript* Create(ScriptElementBase*, const TextPosition&);
 
-  static PendingScript* CreateForTesting(ScriptResource*);
+  static ClassicPendingScript* CreateForTesting(ScriptResource*);
 
-  ~PendingScript() override;
-
-  TextPosition StartingPosition() const { return starting_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 parser_blocking_load_start_time_;
-  }
-
-  void WatchForLoad(PendingScriptClient*);
-  void StopWatchingForLoad();
-
-  ScriptElementBase* GetElement() const;
-
-  DECLARE_TRACE();
-
-  ClassicScript* GetSource(const KURL& document_url,
-                           bool& error_occurred) const;
+  ~ClassicPendingScript() override;
 
   void SetStreamer(ScriptStreamer*);
   void StreamingFinished();
 
-  bool IsReady() const;
-  bool ErrorOccurred() const;
+  DECLARE_TRACE();
 
-  void StartStreamingIfPossible(Document*, ScriptStreamer::Type);
+  blink::ScriptType GetScriptType() const override {
+    return blink::ScriptType::kClassic;
+  }
+
+  ClassicScript* GetSource(const KURL& document_url,
+                           bool& error_occurred) const override;
+  bool IsReady() const override;
+  KURL Url() const override;
+  bool IsExternal() const override { return GetResource(); }
+  bool ErrorOccurred() const override;
+  bool WasCanceled() const override;
+  void StartStreamingIfPossible(Document*, ScriptStreamer::Type) override;
+  void RemoveFromMemoryCache() override;
+  void DisposeInternal() override;
+
+  // Just used as the prefinalizer, does the same as PendingScript::Dispose().
+  // We define Dispose() with NOINLINE in ClassicPendingScript just to make
+  // the prefinalizers of PendingScript and ClassicPendingScript have
+  // different addresses to avoid assertion failures on Windows test bots.
   void Dispose();
 
  private:
-  PendingScript(ScriptElementBase*,
-                ScriptResource*,
-                const TextPosition&,
-                bool is_for_testing = false);
-  PendingScript() = delete;
+  ClassicPendingScript(ScriptElementBase*,
+                       ScriptResource*,
+                       const TextPosition&,
+                       bool is_for_testing = false);
+  ClassicPendingScript() = delete;
 
-  void CheckState() const;
+  void CheckState() const override;
 
   // ScriptResourceClient
   void NotifyFinished(Resource*) override;
   String DebugName() const override { return "PendingScript"; }
   void NotifyAppendData(ScriptResource*) override;
 
   // MemoryCoordinatorClient
   void OnPurgeMemory() override;
 
-  bool watching_for_load_;
-
-  // |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> element_;
-
-  TextPosition starting_position_;  // Only used for inline script tags.
   bool integrity_failure_;
-  double parser_blocking_load_start_time_;
 
   Member<ScriptStreamer> streamer_;
-  Member<PendingScriptClient> 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 is_for_testing_;
 };
 
 }  // namespace blink
 
 #endif  // PendingScript_h