src/third_party/WebKit/Source/web/SuspendableScriptExecutor.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6 #include "web/SuspendableScriptExecutor.h"
   7
   8 #include "bindings/core/v8/ScriptController.h"
   9 #include "core/dom/Document.h"
  10 #include "core/frame/LocalFrame.h"
  11 #include "platform/UserGestureIndicator.h"
  12 #include "public/platform/WebVector.h"
  13 #include "public/web/WebScriptExecutionCallback.h"
  14
  15 namespace blink {
  16
  17 void SuspendableScriptExecutor::createAndRun(LocalFrame* frame, int worldID, const Vector<ScriptSourceCode>& sources, int extensionGroup, bool userGesture, WebScriptExecutionCallback* callback)
  18 {
  19     SuspendableScriptExecutor* executor = new SuspendableScriptExecutor(frame, worldID, sources, extensionGroup, userGesture, callback);
  20     executor->run();
  21 }
  22
  23 void SuspendableScriptExecutor::resume()
  24 {
  25     executeAndDestroySelf();
  26 }
  27
  28 void SuspendableScriptExecutor::contextDestroyed()
  29 {
  30     // this method can only be called if the script was not called in run()
  31     // and context remained suspend (method resume has never called)
  32     ActiveDOMObject::contextDestroyed();
  33     m_callback->completed(Vector<v8::Local<v8::Value> >());
  34     delete this;
  35 }
  36
  37 SuspendableScriptExecutor::SuspendableScriptExecutor(LocalFrame* frame, int worldID, const Vector<ScriptSourceCode>& sources, int extensionGroup, bool userGesture, WebScriptExecutionCallback* callback)
  38     : ActiveDOMObject(frame->document())
  39     , m_frame(frame)
  40     , m_worldID(worldID)
  41     , m_sources(sources)
  42     , m_extensionGroup(extensionGroup)
  43     , m_userGesture(userGesture)
  44     , m_callback(callback)
  45 {
  46 }
  47
  48 SuspendableScriptExecutor::~SuspendableScriptExecutor()
  49 {
  50 }
  51
  52 void SuspendableScriptExecutor::run()
  53 {
  54     suspendIfNeeded();
  55     ExecutionContext* context = executionContext();
  56     ASSERT(context);
  57     if (context && !context->activeDOMObjectsAreSuspended())
  58         executeAndDestroySelf();
  59 }
  60
  61 void SuspendableScriptExecutor::executeAndDestroySelf()
  62 {
  63     // after calling the destructor of object - object will be unsubscribed from
  64     // resumed and contextDestroyed LifecycleObserver methods
  65     OwnPtr<UserGestureIndicator> indicator;
  66     if (m_userGesture)
  67         indicator = adoptPtr(new UserGestureIndicator(DefinitelyProcessingNewUserGesture));
  68
  69     v8::HandleScope scope(v8::Isolate::GetCurrent());
  70     Vector<v8::Local<v8::Value> > results;
  71     if (m_worldID) {
  72         m_frame->script().executeScriptInIsolatedWorld(m_worldID, m_sources, m_extensionGroup, &results);
  73     } else {
  74         v8::Local<v8::Value> scriptValue = m_frame->script().executeScriptInMainWorldAndReturnValue(m_sources.first());
  75         results.append(scriptValue);
  76     }
  77     m_callback->completed(results);
  78     delete this;
  79 }
  80
  81
  82 } // namespace blink