Add EventHandlerRegistry

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 53 matching lines @@
 #include "core/dom/ContextFeatures.h"
 #include "core/dom/DOMImplementation.h"
 #include "core/dom/DocumentFragment.h"
 #include "core/dom/DocumentLifecycleNotifier.h"
 #include "core/dom/DocumentLifecycleObserver.h"
 #include "core/dom/DocumentMarkerController.h"
 #include "core/dom/DocumentType.h"
 #include "core/dom/Element.h"
 #include "core/dom/ElementDataCache.h"
 #include "core/dom/ElementTraversal.h"
+#include "core/dom/EventHandlerRegistry.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/ExecutionContextTask.h"
 #include "core/dom/MainThreadTaskRunner.h"
 #include "core/dom/MutationObserver.h"
 #include "core/dom/NodeChildRemovalTracker.h"
 #include "core/dom/NodeFilter.h"
 #include "core/dom/NodeIterator.h"
 #include "core/dom/NodeRareData.h"
 #include "core/dom/NodeRenderStyle.h"
 #include "core/dom/NodeRenderingTraversal.h"
@@ skipping 2001 matching lines @@
     m_renderView->setStyle(StyleResolver::styleForDocument(*this));
     view()->updateCompositingLayersAfterStyleChange();
 
     ContainerNode::attach(context);
 
     // FastTextAutosizer can't update render view info while the Document is detached, so update now in case anything changed.
     if (FastTextAutosizer* textAutosizer = fastTextAutosizer())
         textAutosizer->updatePageInfo();
 
     m_lifecycle.advanceTo(DocumentLifecycle::StyleClean);
+    lifecycleNotifier().notifyDocumentWasAttached();

[abarth-chromium, 2014/04/11 19:08:01]

What is it appropriate to do this work during Document::attach?  Generally
speaking, Document::attach is related to visual rendering of the document
whereas keeping track of these events has to do with the object model of the
document, which is independent of visual rendering.

[Sami, 2014/04/15 18:31:52]

Turns out I was a little confused about a document's relation to its window and
thought there was a way to directly move a document from one window to another.
Since this isn't the case (as far as I can tell), we can simplify this problem
down to two transitions:

1. A new document is given a window, which may have existing handlers on it =>
register those handlers.
2. Document is detached => unregister all existing window handlers and stop
tracking new ones.

The first case can we can deal with when constructing the registry and the
second case is served by ActiveDOMObject::stop().

 }
 
 void Document::detach(const AttachContext& context)
 {
     ASSERT(isActive());
     m_lifecycle.advanceTo(DocumentLifecycle::Stopping);
 
     if (page())
         page()->documentDetached(this);
     InspectorInstrumentation::documentDetached(this);
@@ skipping 3409 matching lines @@
         (*it)->invalidateCache(attrName);
 }
 
 void Document::trace(Visitor* visitor)
 {
     Supplementable<Document>::trace(visitor);
     ContainerNode::trace(visitor);
 }
 
 } // namespace WebCore