Implement Custom Elements' entered and left document callbacks.

Source/core/dom/CustomElementCallbackDispatcher.cpp

 /*
  * 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 34 matching lines @@
 {
     DEFINE_STATIC_LOCAL(CustomElementCallbackDispatcher, instance, ());
     return instance;
 }
 
 void CustomElementCallbackDispatcher::enqueueAttributeChangedCallback(PassRefPtr<CustomElementLifecycleCallbacks> callbacks, PassRefPtr<Element> element, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue)
 {
     if (!callbacks->hasAttributeChanged())
         return;
 
-    CustomElementCallbackQueue* queue = ensureCallbackQueue(callbacks, element);
-    bool isInCurrentQueue = queue->owner() == currentElementQueue();
-    if (!isInCurrentQueue) {
-        queue->setOwner(currentElementQueue());
-        m_flattenedProcessingStack.append(queue);
-        s_elementQueueEnd++;
-    }
-
-    queue->append(CustomElementCallbackInvocation::createAttributeChangedInvocation(name, oldValue, newValue));
+    CustomElementCallbackQueue* queue = scheduleInCurrentElementQueue(element);
+    queue->append(CustomElementCallbackInvocation::createAttributeChangedInvocation(callbacks, name, oldValue, newValue));
 }
 
 void CustomElementCallbackDispatcher::enqueueCreatedCallback(PassRefPtr<CustomElementLifecycleCallbacks> callbacks, PassRefPtr<Element> element)
 {
     if (!callbacks->hasCreated())
         return;
 
-    CustomElementCallbackQueue* queue = createCallbackQueue(callbacks, element);
+    CustomElementCallbackQueue* queue = createCallbackQueue(element);
     queue->setOwner(currentElementQueue());
 
     // The created callback is unique in being prepended to the front
     // of the element queue
     m_flattenedProcessingStack.insert(inCallbackDeliveryScope() ? s_elementQueueStart : /* skip null sentinel */ 1, queue);
     s_elementQueueEnd++;
 
-    queue->append(CustomElementCallbackInvocation::createCreatedInvocation());
+    queue->append(CustomElementCallbackInvocation::createInvocation(callbacks, CustomElementLifecycleCallbacks::Created));
+}
+
+void CustomElementCallbackDispatcher::enqueueEnteredDocumentCallback(PassRefPtr<CustomElementLifecycleCallbacks> callbacks, PassRefPtr<Element> element)
+{
+    if (!callbacks->hasEnteredDocument())
+        return;
+
+    CustomElementCallbackQueue* queue = scheduleInCurrentElementQueue(element);
+    queue->append(CustomElementCallbackInvocation::createInvocation(callbacks, CustomElementLifecycleCallbacks::EnteredDocument));
+}
+
+void CustomElementCallbackDispatcher::enqueueLeftDocumentCallback(PassRefPtr<CustomElementLifecycleCallbacks> callbacks, PassRefPtr<Element> element)
+{
+    if (!callbacks->hasLeftDocument())
+        return;
+
+    CustomElementCallbackQueue* queue = scheduleInCurrentElementQueue(element);
+    queue->append(CustomElementCallbackInvocation::createInvocation(callbacks, CustomElementLifecycleCallbacks::LeftDocument));
 }
 
 // Dispatches callbacks at microtask checkpoint.
 bool CustomElementCallbackDispatcher::dispatch()
 {
     ASSERT(isMainThread());
     if (inCallbackDeliveryScope())
         return false;
 
     size_t start = 1; // skip null sentinel
@@ skipping 38 matching lines @@
     }
 
     // Pop the element queue from the processing stack
     m_flattenedProcessingStack.resize(start);
     s_elementQueueEnd = start;
 
     if (start == /* allow sentinel */ 1)
         m_elementCallbackQueueMap.clear();
 }
 
-CustomElementCallbackQueue* CustomElementCallbackDispatcher::createCallbackQueue(PassRefPtr<CustomElementLifecycleCallbacks> callbacks, PassRefPtr<Element> element)
+CustomElementCallbackQueue* CustomElementCallbackDispatcher::createCallbackQueue(PassRefPtr<Element> element)
 {
     Element* key = element.get();
-    ElementCallbackQueueMap::AddResult result = m_elementCallbackQueueMap.add(key, CustomElementCallbackQueue::create(callbacks, element));
+    ElementCallbackQueueMap::AddResult result = m_elementCallbackQueueMap.add(key, CustomElementCallbackQueue::create(element));
     ASSERT(result.isNewEntry);
     return result.iterator->value.get();
 }
 
-CustomElementCallbackQueue* CustomElementCallbackDispatcher::ensureCallbackQueue(PassRefPtr<CustomElementLifecycleCallbacks> callbacks, PassRefPtr<Element> element)
+CustomElementCallbackQueue* CustomElementCallbackDispatcher::ensureCallbackQueue(PassRefPtr<Element> element)
 {
     Element* key = element.get();
     ElementCallbackQueueMap::iterator it = m_elementCallbackQueueMap.find(key);
     if (it == m_elementCallbackQueueMap.end())
-        it = m_elementCallbackQueueMap.add(key, CustomElementCallbackQueue::create(callbacks, element)).iterator;
+        it = m_elementCallbackQueueMap.add(key, CustomElementCallbackQueue::create(element)).iterator;
     return it->value.get();
 }
 
+CustomElementCallbackQueue* CustomElementCallbackDispatcher::scheduleInCurrentElementQueue(PassRefPtr<Element> element)

[Yuta Kitamura, 2013/07/08 03:40:49]

I would appreciate if you can write some commentary for this function
as it seems to do something tricky.

+{
+    CustomElementCallbackQueue* queue = ensureCallbackQueue(element);
+    bool isInCurrentQueue = queue->owner() == currentElementQueue();
+    if (!isInCurrentQueue) {
+        queue->setOwner(currentElementQueue());
+        m_flattenedProcessingStack.append(queue);
+        s_elementQueueEnd++;

[Yuta Kitamura, 2013/07/08 03:40:49]

nit: Prefixed operator++ is better.

+    }
+    return queue;
+}
+
 } // namespace WebCore