WIP: Reland CompiledScript, prototype compiling in a separate task.

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
  *    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/CompiledScript.h"
 #include "bindings/core/v8/ScriptStreamer.h"
 #include "core/CoreExport.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 "wtf/text/TextPosition.h"
 
 namespace blink {
@@ skipping 51 matching lines @@
 
   void watchForLoad(PendingScriptClient*);
   void stopWatchingForLoad();
 
   Element* element() const;
 
   DECLARE_TRACE();
 
   ScriptSourceCode getSource(const KURL& documentURL,
                              bool& errorOccurred) const;
+  CompiledScript* getCompiledScript() const { return m_compiledScript.get(); }
 
   void setStreamer(ScriptStreamer*);
   void streamingFinished();
 
-  bool isReady() const;
+  // TODO(jbroman): disambiguate what "ready" means
+  bool isReady() const;  // { return m_isReady; }
   bool errorOccurred() const;
 
   void dispose();
 
  private:
   PendingScript(Element*,
                 ScriptResource*,
                 const TextPosition&,
                 bool isForTesting = false);
   PendingScript() = delete;
 
+  // Called when the final source is available (i.e. the resource has loaded,
+  // and streaming, if applicable, has completed).
+  void fetchFinished();
+
+  // Called when the script compile step is complete or determined unnecessary.
+  void compileFinished();
+
   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;
 
+  enum ReadyState {
+    kWaitingForResource,
+    kWaitingForStreaming,
+    kWaitingForCompile,
+    kReady,
+  };
+  void advanceReadyState(ReadyState readyState) {
+    CHECK_GT(readyState, m_readyState) << this;
+    m_readyState = readyState;
+
+    if (resource()) {
+      CHECK_EQ(m_readyState > kWaitingForResource, resource()->isLoaded());
+      CHECK_EQ(
+          m_readyState > kWaitingForStreaming,
+          resource()->isLoaded() && (!m_streamer || m_streamer->isFinished()))
+          << "readystate=" << m_readyState << ' ' << resource()->isLoaded()
+          << ' ' << (m_streamer ? (m_streamer->isFinished() ? 'y' : 'n') : '-');
+    } else {
+      CHECK_EQ(m_readyState, kReady);
+    }
+  }
+  ReadyState m_readyState;
+
   // |m_element| must points to the corresponding ScriptLoader's element and
   // thus must be non-null before dispose() is called (except for unit tests).
   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;
 
+  Member<CompiledScript> m_compiledScript;
+
   // 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