De-Element ScriptLoader

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

 /*
  * 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.
  */
 
 #include "core/dom/PendingScript.h"
 
 #include "bindings/core/v8/ScriptSourceCode.h"
-#include "core/dom/Element.h"
+#include "core/dom/ScriptLoaderClient.h"
 #include "core/frame/SubresourceIntegrity.h"
 #include "platform/SharedBuffer.h"
 #include "wtf/CurrentTime.h"
 
 namespace blink {
 
-PendingScript* PendingScript::create(Element* element,
+PendingScript* PendingScript::create(ScriptLoaderClient* scriptLoaderClient,
                                      ScriptResource* resource) {
-  return new PendingScript(element, resource, TextPosition());
+  return new PendingScript(scriptLoaderClient, resource, TextPosition());
 }
 
-PendingScript* PendingScript::create(Element* element,
+PendingScript* PendingScript::create(ScriptLoaderClient* scriptLoaderClient,
                                      const TextPosition& startingPosition) {
-  return new PendingScript(element, nullptr, startingPosition);
+  return new PendingScript(scriptLoaderClient, nullptr, startingPosition);
 }
 
 PendingScript* PendingScript::createForTesting(ScriptResource* resource) {
   return new PendingScript(nullptr, resource, TextPosition(), true);
 }
 
-PendingScript::PendingScript(Element* element,
+PendingScript::PendingScript(ScriptLoaderClient* scriptLoaderClient,
                              ScriptResource* resource,
                              const TextPosition& startingPosition,
                              bool isForTesting)
     : m_watchingForLoad(false),
-      m_element(element),
+      m_scriptLoaderClient(scriptLoaderClient),
       m_startingPosition(startingPosition),
       m_integrityFailure(false),
       m_parserBlockingLoadStartTime(0),
       m_client(nullptr),
       m_isForTesting(isForTesting) {
   checkState();
   setResource(resource);
   MemoryCoordinator::instance().registerClient(this);
 }
 
 PendingScript::~PendingScript() {}
 
 NOINLINE void PendingScript::checkState() const {
   // TODO(hiroshige): Turn these CHECK()s into DCHECK() before going to beta.
-  CHECK(m_isForTesting || m_element);
+  CHECK(m_isForTesting || m_scriptLoaderClient);
   CHECK(resource() || !m_streamer);
   CHECK(!m_streamer || m_streamer->resource() == resource());
 }
 
 void PendingScript::dispose() {
   stopWatchingForLoad();
   DCHECK(!m_client);
   DCHECK(!m_watchingForLoad);
 
   setResource(nullptr);
   m_startingPosition = TextPosition::belowRangePosition();
   m_integrityFailure = false;
   m_parserBlockingLoadStartTime = 0;
   if (m_streamer)
     m_streamer->cancel();
   m_streamer = nullptr;
-  m_element = nullptr;
+  m_scriptLoaderClient = nullptr;
 }
 
 void PendingScript::watchForLoad(PendingScriptClient* client) {
   checkState();
 
   DCHECK(!m_watchingForLoad);
   // addClient() will call streamingFinished() if the load is complete. Callers
   // who do not expect to be re-entered from this call should not call
   // watchForLoad for a PendingScript which isReady. We also need to set
   // m_watchingForLoad early, since addClient() can result in calling
   // notifyFinished and further stopWatchingForLoad().
   m_watchingForLoad = true;
   m_client = client;
   if (isReady())
     m_client->pendingScriptFinished(this);
 }
 
 void PendingScript::stopWatchingForLoad() {
   if (!m_watchingForLoad)
     return;
   checkState();
   DCHECK(resource());
   m_client = nullptr;
   m_watchingForLoad = false;
 }
 
-Element* PendingScript::element() const {
-  // As mentioned in the comment at |m_element| declaration, |m_element|
-  // must points to the corresponding ScriptLoader's element.
-  CHECK(m_element);
-  return m_element.get();
+ScriptLoaderClient* PendingScript::scriptLoaderClient() const {
+  // As mentioned in the comment at |m_scriptLoaderClient| declaration,
+  // |m_scriptLoaderClient|  must point to the corresponding ScriptLoader's
+  // client.
+  CHECK(m_scriptLoaderClient);
+  return m_scriptLoaderClient.get();
 }
 
 void PendingScript::streamingFinished() {
   checkState();
   DCHECK(resource());
   if (m_client)
     m_client->pendingScriptFinished(this);
 }
 
 void PendingScript::markParserBlockingLoadStartTime() {
   DCHECK_EQ(m_parserBlockingLoadStartTime, 0.0);
   m_parserBlockingLoadStartTime = monotonicallyIncreasingTime();
 }
 
 // Returns true if SRI check passed.
-static bool checkScriptResourceIntegrity(Resource* resource, Element* element) {
+static bool checkScriptResourceIntegrity(
+    Resource* resource,
+    ScriptLoaderClient* scriptLoaderClient) {
   DCHECK_EQ(resource->getType(), Resource::Script);
   ScriptResource* scriptResource = toScriptResource(resource);
-  String integrityAttr = element->fastGetAttribute(HTMLNames::integrityAttr);
+  String integrityAttr = scriptLoaderClient->integrityAttributeValue();
 
   // It is possible to get back a script resource with integrity metadata
   // for a request with an empty integrity attribute. In that case, the
   // integrity check should be skipped, so this check ensures that the
   // integrity attribute isn't empty in addition to checking if the
   // resource has empty integrity metadata.
   if (integrityAttr.isEmpty() || scriptResource->integrityMetadata().isEmpty())
     return true;
 
   switch (scriptResource->integrityDisposition()) {
     case ResourceIntegrityDisposition::Passed:
       return true;
 
     case ResourceIntegrityDisposition::Failed:
       // TODO(jww): This should probably also generate a console
       // message identical to the one produced by
       // CheckSubresourceIntegrity below. See https://crbug.com/585267.
       return false;
 
     case ResourceIntegrityDisposition::NotChecked: {
       if (!resource->resourceBuffer())
         return true;
 
       bool passed = SubresourceIntegrity::CheckSubresourceIntegrity(
-          scriptResource->integrityMetadata(), *element,
+          scriptResource->integrityMetadata(), scriptLoaderClient->document(),
           resource->resourceBuffer()->data(),
           resource->resourceBuffer()->size(), resource->url(), *resource);
       scriptResource->setIntegrityDisposition(
           passed ? ResourceIntegrityDisposition::Passed
                  : ResourceIntegrityDisposition::Failed);
       return passed;
     }
   }
 
   NOTREACHED();
@@ skipping 17 matching lines @@
   // In order to simulate the correct behavior, Blink explicitly does the SRI
   // checks here, when a PendingScript tied to a particular request is
   // finished (and in the case of a StyleSheet, at the point of execution),
   // while having proper Fetch checks in the fetch module for use in the
   // fetch JavaScript API. In a future world where the ResourceFetcher uses
   // the Fetch algorithm, this should be fixed by having separate Response
   // objects (perhaps attached to identical Resource objects) per request.
   //
   // See https://crbug.com/500701 for more information.
   checkState();
-  if (m_element)
-    m_integrityFailure = !checkScriptResourceIntegrity(resource, m_element);
+  if (m_scriptLoaderClient) {
+    m_integrityFailure =
+        !checkScriptResourceIntegrity(resource, m_scriptLoaderClient);
+  }
 
   // If script streaming is in use, the client will be notified in
   // streamingFinished.
   if (m_streamer)
     m_streamer->notifyFinished(resource);
   else if (m_client)
     m_client->pendingScriptFinished(this);
 }
 
 void PendingScript::notifyAppendData(ScriptResource* resource) {
   if (m_streamer)
     m_streamer->notifyAppendData(resource);
 }
 
 DEFINE_TRACE(PendingScript) {
-  visitor->trace(m_element);
+  visitor->trace(m_scriptLoaderClient);
   visitor->trace(m_streamer);
   visitor->trace(m_client);
   ResourceOwner<ScriptResource>::trace(visitor);
   MemoryCoordinatorClient::trace(visitor);
 }
 
 ScriptSourceCode PendingScript::getSource(const KURL& documentURL,
                                           bool& errorOccurred) const {
   checkState();
 
   errorOccurred = this->errorOccurred();
   if (resource()) {
     DCHECK(resource()->isLoaded());
     if (m_streamer && !m_streamer->streamingSuppressed())
       return ScriptSourceCode(m_streamer, resource());
     return ScriptSourceCode(resource());
   }
 
-  return ScriptSourceCode(m_element->textContent(), documentURL,
+  return ScriptSourceCode(m_scriptLoaderClient->textContent(), documentURL,
                           startingPosition());
 }
 
 void PendingScript::setStreamer(ScriptStreamer* streamer) {
   DCHECK(!m_streamer);
   DCHECK(!m_watchingForLoad);
   m_streamer = streamer;
   checkState();
 }
 
@@ skipping 16 matching lines @@
 
 void PendingScript::onPurgeMemory() {
   checkState();
   if (!m_streamer)
     return;
   m_streamer->cancel();
   m_streamer = nullptr;
 }
 
 }  // namespace blink