Extract simpler classes for observing context lifecycle and observe Page lifecycle inNavigatorVibra…

Source/core/dom/ContextLifecycleNotifier.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2013 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
@@ skipping 10 matching lines @@
  * 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 "config.h"
 #include "core/dom/ContextLifecycleNotifier.h"
 
+#include "core/dom/ScriptExecutionContext.h"
 #include "wtf/TemporaryChange.h"
 
 namespace WebCore {
 
 ContextLifecycleNotifier::ContextLifecycleNotifier(ScriptExecutionContext* context)
-    : m_context(context)
-    , m_iterating(IteratingNone)
-    , m_inDestructor(false)
+    : LifecycleNotifier(context)
 {
 }
 
 ContextLifecycleNotifier::~ContextLifecycleNotifier()
 {
-    m_inDestructor = true;
-    for (ContextObserverSet::iterator iter = m_contextObservers.begin(); iter != m_contextObservers.end(); iter = m_contextObservers.begin()) {
-        ContextLifecycleObserver* observer = *iter;
-        m_contextObservers.remove(observer);
-        ASSERT(observer->scriptExecutionContext() == m_context);
-        observer->contextDestroyed();
-    }
 }
 
-void ContextLifecycleNotifier::addObserver(ContextLifecycleObserver* observer, ContextLifecycleObserver::Type as)
+void ContextLifecycleNotifier::addObserver(LifecycleObserver* observer, LifecycleObserver::Type type)
 {
-    RELEASE_ASSERT(!m_inDestructor);
+    LifecycleNotifier::addObserver(observer, type);
+
     RELEASE_ASSERT(m_iterating != IteratingOverContextObservers);
-    m_contextObservers.add(observer);
-    if (as == ContextLifecycleObserver::ActiveDOMObjectType) {
+    if (type == LifecycleObserver::ActiveDOMObjectType) {
         RELEASE_ASSERT(m_iterating != IteratingOverActiveDOMObjects);
         m_activeDOMObjects.add(static_cast<ActiveDOMObject*>(observer));
     }
 }
 
-void ContextLifecycleNotifier::removeObserver(ContextLifecycleObserver* observer, ContextLifecycleObserver::Type as)
+void ContextLifecycleNotifier::removeObserver(LifecycleObserver* observer, LifecycleObserver::Type type)
 {
-    RELEASE_ASSERT(!m_inDestructor);
+    LifecycleNotifier::removeObserver(observer, type);
+
     RELEASE_ASSERT(m_iterating != IteratingOverContextObservers);
-    m_contextObservers.remove(observer);
-    if (as == ContextLifecycleObserver::ActiveDOMObjectType) {
+    if (type == LifecycleObserver::ActiveDOMObjectType) {
         RELEASE_ASSERT(m_iterating != IteratingOverActiveDOMObjects);
         m_activeDOMObjects.remove(static_cast<ActiveDOMObject*>(observer));
     }
 }
 
 void ContextLifecycleNotifier::notifyResumingActiveDOMObjects()
 {
     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverActiveDOMObjects);
     ActiveDOMObjectSet::iterator activeObjectsEnd = m_activeDOMObjects.end();
     for (ActiveDOMObjectSet::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
-        ASSERT((*iter)->scriptExecutionContext() == m_context);
+        ASSERT((*iter)->scriptExecutionContext() == context());
         ASSERT((*iter)->suspendIfNeededCalled());
         (*iter)->resume();
     }
 }
 
 void ContextLifecycleNotifier::notifySuspendingActiveDOMObjects(ActiveDOMObject::ReasonForSuspension why)
 {
     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverActiveDOMObjects);
     ActiveDOMObjectSet::iterator activeObjectsEnd = m_activeDOMObjects.end();
     for (ActiveDOMObjectSet::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
-        ASSERT((*iter)->scriptExecutionContext() == m_context);
+        ASSERT((*iter)->scriptExecutionContext() == context());
         ASSERT((*iter)->suspendIfNeededCalled());
         (*iter)->suspend(why);
     }
 }
 
 void ContextLifecycleNotifier::notifyStoppingActiveDOMObjects()
 {
     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverActiveDOMObjects);
     ActiveDOMObjectSet::iterator activeObjectsEnd = m_activeDOMObjects.end();
     for (ActiveDOMObjectSet::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
-        ASSERT((*iter)->scriptExecutionContext() == m_context);
+        ASSERT((*iter)->scriptExecutionContext() == context());
         ASSERT((*iter)->suspendIfNeededCalled());
         (*iter)->stop();
     }
 }
 
 bool ContextLifecycleNotifier::canSuspendActiveDOMObjects()
 {
     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverActiveDOMObjects);
     ActiveDOMObjectSet::iterator activeObjectsEnd = m_activeDOMObjects.end();
     for (ActiveDOMObjectSet::const_iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) {
-        ASSERT((*iter)->scriptExecutionContext() == m_context);
+        ASSERT((*iter)->scriptExecutionContext() == context());
         ASSERT((*iter)->suspendIfNeededCalled());
         if (!(*iter)->canSuspend())
             return false;
     }
 
     return true;
 }
 
 bool ContextLifecycleNotifier::hasPendingActivity() const
 {
     ActiveDOMObjectSet::const_iterator activeObjectsEnd = activeDOMObjects().end();
     for (ActiveDOMObjectSet::const_iterator iter = activeDOMObjects().begin(); iter != activeObjectsEnd; ++iter) {
         if ((*iter)->hasPendingActivity())
             return true;
     }
 
     return false;
 }
 
 } // namespace WebCore