Rework MediaQueryMatcher to batch up listener notification

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 622 matching lines @@
 SelectorQueryCache& Document::selectorQueryCache()
 {
     if (!m_selectorQueryCache)
         m_selectorQueryCache = adoptPtr(new SelectorQueryCache());
     return *m_selectorQueryCache;
 }
 
 MediaQueryMatcher& Document::mediaQueryMatcher()
 {
     if (!m_mediaQueryMatcher)
-        m_mediaQueryMatcher = MediaQueryMatcher::create(this);
+        m_mediaQueryMatcher = MediaQueryMatcher::create(*this);
     return *m_mediaQueryMatcher;
 }
 
 void Document::mediaQueryAffectingValueChanged()
 {
     styleEngine()->clearMediaQueryRuleSetStyleSheets();
 }
 
 void Document::setCompatibilityMode(CompatibilityMode mode)
 {
@@ skipping 1504 matching lines @@
         parentDoc->didClearTouchEventHandlers(this);
 
     // This is required, as our LocalFrame might delete itself as soon as it detaches
     // us. However, this violates Node::detach() semantics, as it's never
     // possible to re-attach. Eventually Document::detach() should be renamed,
     // or this setting of the frame to 0 could be made explicit in each of the
     // callers of Document::detach().
     m_frame = 0;
 
     if (m_mediaQueryMatcher)
-        m_mediaQueryMatcher->documentDestroyed();
+        m_mediaQueryMatcher->documentDetached();
 
     lifecycleNotifier().notifyDocumentWasDetached();
     m_lifecycle.advanceTo(DocumentLifecycle::Stopped);
 }
 
 void Document::prepareForDestruction()
 {
     m_markers->prepareForDestruction();
     disconnectDescendantFrames();
 
@@ skipping 1139 matching lines @@
 {
     if (!m_evaluateMediaQueriesOnStyleRecalc)
         return;
     evaluateMediaQueryList();
     m_evaluateMediaQueriesOnStyleRecalc = false;
 }
 
 void Document::evaluateMediaQueryList()
 {
     if (m_mediaQueryMatcher)
-        m_mediaQueryMatcher->styleResolverChanged();
+        m_mediaQueryMatcher->mediaChanged();

[kenneth.r.christiansen, 2014/04/03 21:54:15]

handleMediaChanged? actually I consider media to mean the media type and not the
whole query, which can contain media features. I don't know if we can find a
better name which covers type and features.

handleMediaPropertiesChanged?

[rune, 2014/06/10 06:17:07]

I was just looking at this in a different context. I thought about naming it
mediaFeaturesChanged().

 }
 
 void Document::notifyResizeForViewportUnits()
 {
     if (!hasViewportUnits())
         return;
     ensureStyleResolver().notifyResizeForViewportUnits();
     setNeedsStyleRecalcForViewportUnits();
 }
 
@@ skipping 2183 matching lines @@
 }
 
 void Document::invalidateNodeListCaches(const QualifiedName* attrName)
 {
     HashSet<LiveNodeListBase*>::iterator end = m_listsInvalidatedAtDocument.end();
     for (HashSet<LiveNodeListBase*>::iterator it = m_listsInvalidatedAtDocument.begin(); it != end; ++it)
         (*it)->invalidateCache(attrName);
 }
 
 } // namespace WebCore