Attachment 111650 Details for Bug 68955 – Patch

[patch] Patch

bug-68955-20111019112256.patch (text/plain), 48.98 KB, created by Rafael Weinstein on 2011-10-19 11:22:57 PDT

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Creator: Rafael Weinstein

Created: 2011-10-19 11:22:57 PDT

Size: 48.98 KB

patch

obsolete

>Subversion Revision: 97864
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 8f3a7810f943a9545025b4249c1646de37fa15bd..72e1788d15ddb13c07d3a82622b5d743ce5a0da5 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,65 @@
>+2011-10-18  Rafael Weinstein  <rafaelw@chromium.org>
>+
>+        [MutationObservers] Implement WebKitMutationObserver.observe for childList changes
>+        https://bugs.webkit.org/show_bug.cgi?id=68955
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        This patch adds a ChildListMutationScope object which manages the coalescing of
>+        multiple child removals and additions within DOM operations into single childList
>+        mutation records.
>+
>+        Note that this patch doesn't cover all the cases which can be coalesced (it only
>+        covers ContainerNode.*, and Node.innerHTML/innerText). A separate bug,
>+        https://bugs.webkit.org/show_bug.cgi?id=70385, has been opened to track the
>+        remaining cases.
>+
>+        Test: fast/mutation/observe-childList.html
>+
>+        * CMakeLists.txt:
>+        * GNUmakefile.list.am:
>+        * WebCore.gypi:
>+        * WebCore.pro:
>+        * WebCore.vcproj/WebCore.vcproj:
>+        * WebCore.xcodeproj/project.pbxproj:
>+        * dom/ContainerNode.cpp:
>+        (WebCore::ContainerNode::insertBefore):
>+        (WebCore::ContainerNode::replaceChild):
>+        (WebCore::willRemoveChildren):
>+        (WebCore::dispatchChildInsertionEvents):
>+        (WebCore::dispatchChildRemovalEvents):
>+        * dom/Element.cpp:
>+        (WebCore::enqueueAttributesMutationRecord):
>+        * dom/MutationScope.cpp: Added.
>+        (WebCore::ChildListAccumulation::ChildListAccumulation::ChildListAccumulation):
>+        (WebCore::ChildListAccumulation::ChildListAccumulation::~ChildListAccumulation):
>+        (WebCore::ChildListAccumulation::ChildListAccumulation::childAdded):
>+        (WebCore::ChildListAccumulation::ChildListAccumulation::willRemoveChild):
>+        (WebCore::ChildListAccumulation::ChildListAccumulation::dispatch):
>+        (WebCore::ChildListAccumulation::ChildListAccumulation::clear):
>+        (WebCore::ChildListAccumulation::ChildListAccumulation::isEmpty):
>+        (WebCore::ChildListAccumulation::ChildListAccumulator::ChildListAccumulator):
>+        (WebCore::ChildListAccumulation::ChildListAccumulator::~ChildListAccumulator):
>+        (WebCore::ChildListAccumulation::ChildListAccumulator::initialize):
>+        (WebCore::ChildListAccumulation::ChildListAccumulator::instance):
>+        (WebCore::ChildListAccumulation::ChildListAccumulator::childAdded):
>+        (WebCore::ChildListAccumulation::ChildListAccumulator::willRemoveChild):
>+        (WebCore::ChildListAccumulation::ChildListAccumulator::incrementScopingLevel):
>+        (WebCore::ChildListAccumulation::ChildListAccumulator::decrementScopingLevel):
>+        (WebCore::ChildListMutationScope::ChildListMutationScope):
>+        (WebCore::ChildListMutationScope::~ChildListMutationScope):
>+        (WebCore::ChildListMutationScope::childAdded):
>+        (WebCore::ChildListMutationScope::willRemoveChild):
>+        * dom/MutationScope.h: Added.
>+        * dom/Node.cpp:
>+        (WebCore::Node::setTextContent):
>+        (WebCore::Node::registeredMutationObserversOfType):
>+        * dom/WebKitMutationObserver.cpp:
>+        (WebCore::WebKitMutationObserver::disconnect):
>+        * html/HTMLElement.cpp:
>+        (WebCore::replaceChildrenWithFragment):
>+        (WebCore::replaceChildrenWithText):
>+
> 2011-10-19  Renata Hodovan  <reni@webkit.org>
> 
>         Add new renderer for SVGRectElement.
>diff --git a/Source/WebCore/CMakeLists.txt b/Source/WebCore/CMakeLists.txt
>index db50ff9f69a6e9d339f24c51a8c99e71fc43f62c..b1b5896ddd3a1fa3da2f3fc821a98f8620ca58a4 100644
>--- a/Source/WebCore/CMakeLists.txt
>+++ b/Source/WebCore/CMakeLists.txt
>@@ -563,6 +563,7 @@ SET(WebCore_SOURCES
>     dom/MouseRelatedEvent.cpp
>     dom/MutationEvent.cpp
>     dom/MutationRecord.cpp
>+    dom/MutationScope.cpp
>     dom/NamedNodeMap.cpp
>     dom/NameNodeList.cpp
>     dom/Node.cpp
>diff --git a/Source/WebCore/GNUmakefile.list.am b/Source/WebCore/GNUmakefile.list.am
>index 4806f993e1c75e24779052d55d5787bb5ebee9e9..97847cf8d44df28eaf4540389dbb634c8b3dbdbf 100644
>--- a/Source/WebCore/GNUmakefile.list.am
>+++ b/Source/WebCore/GNUmakefile.list.am
>@@ -1253,6 +1253,8 @@ webcore_sources += \
> 	Source/WebCore/dom/MutationEvent.h \
> 	Source/WebCore/dom/MutationRecord.cpp \
> 	Source/WebCore/dom/MutationRecord.h \
>+	Source/WebCore/dom/MutationScope.cpp \
>+	Source/WebCore/dom/MutationScope.h \
> 	Source/WebCore/dom/NamedNodeMap.cpp \
> 	Source/WebCore/dom/NamedNodeMap.h \
> 	Source/WebCore/dom/NameNodeList.cpp \
>diff --git a/Source/WebCore/WebCore.gypi b/Source/WebCore/WebCore.gypi
>index 9277596207efee60314219f7f07acf4ca63f46ce..efedcf32505d55f2a482e591238a216fd073aab4 100644
>--- a/Source/WebCore/WebCore.gypi
>+++ b/Source/WebCore/WebCore.gypi
>@@ -5231,6 +5231,8 @@
>             'dom/MutationEvent.h',
>             'dom/MutationRecord.cpp',
>             'dom/MutationRecord.h',
>+            'dom/MutationScope.cpp',
>+            'dom/MutationScope.h',
>             'dom/NameNodeList.cpp',
>             'dom/NameNodeList.h',
>             'dom/NamedNodeMap.cpp',
>diff --git a/Source/WebCore/WebCore.pro b/Source/WebCore/WebCore.pro
>index d943e58a0fb4c69ce4e52f89e3254e18f5a6ba7b..4161e46718255124c0c347b846a6b562dc18dc3b 100644
>--- a/Source/WebCore/WebCore.pro
>+++ b/Source/WebCore/WebCore.pro
>@@ -521,6 +521,7 @@ SOURCES += \
>     dom/MouseRelatedEvent.cpp \
>     dom/MutationEvent.cpp \
>     dom/MutationRecord.cpp \
>+    dom/MutationScope.cpp \
>     dom/NamedNodeMap.cpp \
>     dom/NameNodeList.cpp \
>     dom/Node.cpp \
>diff --git a/Source/WebCore/WebCore.vcproj/WebCore.vcproj b/Source/WebCore/WebCore.vcproj/WebCore.vcproj
>index 25d6acdea586f8285cff7d9dba426b264de5bb4b..6249f320227e223908e1ef7838b5a747732e1393 100755
>--- a/Source/WebCore/WebCore.vcproj/WebCore.vcproj
>+++ b/Source/WebCore/WebCore.vcproj/WebCore.vcproj
>@@ -47610,6 +47610,62 @@
> 				>
> 			</File>
> 			<File
>+				RelativePath="..\dom\MutationScope.cpp"
>+				>
>+				<FileConfiguration
>+					Name="Debug|Win32"
>+					ExcludedFromBuild="true"
>+					>
>+					<Tool
>+						Name="VCCLCompilerTool"
>+					/>
>+				</FileConfiguration>
>+				<FileConfiguration
>+					Name="Release|Win32"
>+					ExcludedFromBuild="true"
>+					>
>+					<Tool
>+						Name="VCCLCompilerTool"
>+					/>
>+				</FileConfiguration>
>+				<FileConfiguration
>+					Name="Debug_Cairo_CFLite|Win32"
>+					ExcludedFromBuild="true"
>+					>
>+					<Tool
>+						Name="VCCLCompilerTool"
>+					/>
>+				</FileConfiguration>
>+				<FileConfiguration
>+					Name="Release_Cairo_CFLite|Win32"
>+					ExcludedFromBuild="true"
>+					>
>+					<Tool
>+						Name="VCCLCompilerTool"
>+					/>
>+				</FileConfiguration>
>+				<FileConfiguration
>+					Name="Debug_All|Win32"
>+					ExcludedFromBuild="true"
>+					>
>+					<Tool
>+						Name="VCCLCompilerTool"
>+					/>
>+				</FileConfiguration>
>+				<FileConfiguration
>+					Name="Production|Win32"
>+					ExcludedFromBuild="true"
>+					>
>+					<Tool
>+						Name="VCCLCompilerTool"
>+					/>
>+				</FileConfiguration>
>+			</File>
>+			<File
>+				RelativePath="..\dom\MutationScope.h"
>+				>
>+			</File>
>+			<File
> 				RelativePath="..\dom\NamedNodeMap.cpp"
> 				>
> 			</File>
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index b9768af361fe3b6dcf45040763ce75b1f29fbd91..3bd29e9018d96b75a017878e3388475eb85d303f 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -5786,6 +5786,8 @@
> 		D3AA10F4123A98AA0092152B /* MediaQueryMatcher.h in Headers */ = {isa = PBXBuildFile; fileRef = D3AA10F2123A98AA0092152B /* MediaQueryMatcher.h */; };
> 		D3D4E972130C7CFE007BA540 /* HTMLSummaryElement.cpp in Sources */ = {isa = PBXBuildFile; fileRef = D3D4E970130C7CFE007BA540 /* HTMLSummaryElement.cpp */; };
> 		D3D4E973130C7CFE007BA540 /* HTMLSummaryElement.h in Headers */ = {isa = PBXBuildFile; fileRef = D3D4E971130C7CFE007BA540 /* HTMLSummaryElement.h */; };
>+		D619A307144E00BE004BC302 /* MutationScope.cpp in Sources */ = {isa = PBXBuildFile; fileRef = D619A305144E00BE004BC302 /* MutationScope.cpp */; };
>+		D619A308144E00BE004BC302 /* MutationScope.h in Headers */ = {isa = PBXBuildFile; fileRef = D619A306144E00BE004BC302 /* MutationScope.h */; };
> 		D70AD65713E1342B005B50B4 /* RenderRegion.cpp in Sources */ = {isa = PBXBuildFile; fileRef = D70AD65513E1342B005B50B4 /* RenderRegion.cpp */; };
> 		D70AD65813E1342B005B50B4 /* RenderRegion.h in Headers */ = {isa = PBXBuildFile; fileRef = D70AD65613E1342B005B50B4 /* RenderRegion.h */; };
> 		D8B6152F1032495100C8554A /* Cookie.h in Headers */ = {isa = PBXBuildFile; fileRef = D8B6152E1032495100C8554A /* Cookie.h */; settings = {ATTRIBUTES = (Private, ); }; };
>@@ -13090,6 +13092,8 @@
> 		D3AA10F2123A98AA0092152B /* MediaQueryMatcher.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MediaQueryMatcher.h; sourceTree = "<group>"; };
> 		D3D4E970130C7CFE007BA540 /* HTMLSummaryElement.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = HTMLSummaryElement.cpp; sourceTree = "<group>"; };
> 		D3D4E971130C7CFE007BA540 /* HTMLSummaryElement.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HTMLSummaryElement.h; sourceTree = "<group>"; };
>+		D619A305144E00BE004BC302 /* MutationScope.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = MutationScope.cpp; sourceTree = "<group>"; };
>+		D619A306144E00BE004BC302 /* MutationScope.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MutationScope.h; sourceTree = "<group>"; };
> 		D70AD65513E1342B005B50B4 /* RenderRegion.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = RenderRegion.cpp; sourceTree = "<group>"; };
> 		D70AD65613E1342B005B50B4 /* RenderRegion.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RenderRegion.h; sourceTree = "<group>"; };
> 		D8B6152E1032495100C8554A /* Cookie.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Cookie.h; sourceTree = "<group>"; };
>@@ -21122,6 +21126,8 @@
> 				C6F08FB91430FE8F00685849 /* MutationRecord.cpp */,
> 				C6F08FBA1430FE8F00685849 /* MutationRecord.h */,
> 				C6F08FBB1430FE8F00685849 /* MutationRecord.idl */,
>+				D619A305144E00BE004BC302 /* MutationScope.cpp */,
>+				D619A306144E00BE004BC302 /* MutationScope.h */,
> 				BCF34A3611A231CD00C71804 /* NamedNodeMap.cpp */,
> 				A81872180977D3C0005826D9 /* NamedNodeMap.h */,
> 				85ACA9F90A9B631000671E90 /* NamedNodeMap.idl */,
>@@ -23622,6 +23628,7 @@
> 				C6F0900A14327B6100685849 /* MutationCallback.h in Headers */,
> 				85031B4A0A44EFC700F992E0 /* MutationEvent.h in Headers */,
> 				C6F08FBD1430FE8F00685849 /* MutationRecord.h in Headers */,
>+				D619A308144E00BE004BC302 /* MutationScope.h in Headers */,
> 				A81872230977D3C0005826D9 /* NamedNodeMap.h in Headers */,
> 				A818721E0977D3C0005826D9 /* NameNodeList.h in Headers */,
> 				E10B9B6C0B747599003ED890 /* NativeXPathNSResolver.h in Headers */,
>@@ -26686,6 +26693,7 @@
> 				B1AD4E6213A12A0B00846B27 /* MutableTextTrack.cpp in Sources */,
> 				85031B490A44EFC700F992E0 /* MutationEvent.cpp in Sources */,
> 				C6F08FBC1430FE8F00685849 /* MutationRecord.cpp in Sources */,
>+				D619A307144E00BE004BC302 /* MutationScope.cpp in Sources */,
> 				BCF34A3711A231CD00C71804 /* NamedNodeMap.cpp in Sources */,
> 				A81872240977D3C0005826D9 /* NameNodeList.cpp in Sources */,
> 				E10B9B6D0B747599003ED890 /* NativeXPathNSResolver.cpp in Sources */,
>diff --git a/Source/WebCore/dom/ContainerNode.cpp b/Source/WebCore/dom/ContainerNode.cpp
>index 3ea49936935749b13192b76341d509b1538e4c0c..415aeea5a63526397f8fe70ee7383cf6351c7a9e 100644
>--- a/Source/WebCore/dom/ContainerNode.cpp
>+++ b/Source/WebCore/dom/ContainerNode.cpp
>@@ -35,6 +35,7 @@
> #include "InlineTextBox.h"
> #include "InspectorInstrumentation.h"
> #include "MutationEvent.h"
>+#include "MutationScope.h"
> #include "ResourceLoadScheduler.h"
> #include "Page.h"
> #include "RenderBox.h"
>@@ -141,6 +142,10 @@ bool ContainerNode::insertBefore(PassRefPtr<Node> newChild, Node* refChild, Exce
>     if (refChild->previousSibling() == newChild || refChild == newChild) // nothing to do
>         return true;
> 
>+#if ENABLE(MUTATION_OBSERVERS)
>+    ChildListMutationScope mutation(this);
>+#endif
>+
>     RefPtr<Node> next = refChild;
>     RefPtr<Node> refChildPreviousSibling = refChild->previousSibling();
>     for (NodeVector::const_iterator it = targets.begin(); it != targets.end(); ++it) {
>@@ -272,6 +277,10 @@ bool ContainerNode::replaceChild(PassRefPtr<Node> newChild, Node* oldChild, Exce
>         return false;
>     }
> 
>+#if ENABLE(MUTATION_OBSERVERS)
>+    ChildListMutationScope mutation(this);
>+#endif
>+
>     RefPtr<Node> prev = oldChild->previousSibling();
>     RefPtr<Node> next = oldChild->nextSibling();
> 
>@@ -400,6 +409,10 @@ static void willRemoveChildren(ContainerNode* container)
>     NodeVector children;
>     collectNodes(container, children);
> 
>+#if ENABLE(MUTATION_OBSERVERS)
>+    ChildListMutationScope mutation(container);
>+#endif
>+
>     for (NodeVector::const_iterator it = children.begin(); it != children.end(); it++) {
>         Node* child = it->get();
>         // fire removed from document mutation events.
>@@ -611,6 +624,10 @@ bool ContainerNode::appendChild(PassRefPtr<Node> newChild, ExceptionCode& ec, bo
>     if (targets.isEmpty())
>         return true;
> 
>+#if ENABLE(MUTATION_OBSERVERS)
>+    ChildListMutationScope mutation(this);
>+#endif
>+
>     // Now actually add the child(ren)
>     RefPtr<Node> prev = lastChild();
>     for (NodeVector::const_iterator it = targets.begin(); it != targets.end(); ++it) {
>@@ -1095,6 +1112,13 @@ static void dispatchChildInsertionEvents(Node* child)
>     RefPtr<Node> c = child;
>     RefPtr<Document> document = child->document();
> 
>+#if ENABLE(MUTATION_OBSERVERS)
>+    if (c->parentNode()) {
>+        ChildListMutationScope mutation(c->parentNode());
>+        mutation.childAdded(c);
>+    }
>+#endif
>+
>     if (c->parentNode() && document->hasListenerType(Document::DOMNODEINSERTED_LISTENER))
>         c->dispatchScopedEvent(MutationEvent::create(eventNames().DOMNodeInsertedEvent, true, c->parentNode()));
> 
>@@ -1116,6 +1140,13 @@ static void dispatchChildRemovalEvents(Node* child)
>     RefPtr<Node> c = child;
>     RefPtr<Document> document = child->document();
> 
>+#if ENABLE(MUTATION_OBSERVERS)
>+    if (c->parentNode()) {
>+        ChildListMutationScope mutation(c->parentNode());
>+        mutation.willRemoveChild(c);
>+    }
>+#endif
>+
>     // dispatch pre-removal mutation events
>     if (c->parentNode() && document->hasListenerType(Document::DOMNODEREMOVED_LISTENER))
>         c->dispatchScopedEvent(MutationEvent::create(eventNames().DOMNodeRemovedEvent, true, c->parentNode()));
>diff --git a/Source/WebCore/dom/Element.cpp b/Source/WebCore/dom/Element.cpp
>index d699b19116e831d73fd5523a84eaa2eb586fef57..33f365549cd6056a1dee312877addea8fdbf4987 100644
>--- a/Source/WebCore/dom/Element.cpp
>+++ b/Source/WebCore/dom/Element.cpp
>@@ -625,8 +625,8 @@ static void enqueueAttributesMutationRecord(Element* element, const QualifiedNam
>         return;
> 
>     RefPtr<MutationRecord> mutation = MutationRecord::createAttributes(element, name);
>-    for (Vector<WebKitMutationObserver*>::iterator iter = observers.begin(); iter != observers.end(); ++iter)
>-        (*iter)->enqueueMutationRecord(mutation);
>+    for (size_t i = 0; i < observers.size(); ++i)
>+        observers[i]->enqueueMutationRecord(mutation);
> }
> #endif
> 
>diff --git a/Source/WebCore/dom/MutationScope.cpp b/Source/WebCore/dom/MutationScope.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..738fbde9a2f2bd40a8300f64a2b209f3d0400b6f
>--- /dev/null
>+++ b/Source/WebCore/dom/MutationScope.cpp
>@@ -0,0 +1,283 @@
>+/*
>+ * Copyright (C) 2011 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:
>+ *
>+ *     * Redistributions of source code must retain the above copyright
>+ * notice, this list of conditions and the following disclaimer.
>+ *     * Redistributions in binary form must reproduce the above
>+ * copyright notice, this list of conditions and the following disclaimer
>+ * in the documentation and/or other materials provided with the
>+ * distribution.
>+ *     * Neither the name of Google Inc. nor the names of its
>+ * contributors may be used to endorse or promote products derived from
>+ * this software without specific prior written permission.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
>+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
>+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
>+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
>+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
>+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
>+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
>+ * DATA, OR 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"
>+
>+#if ENABLE(MUTATION_OBSERVERS)
>+
>+#include "MutationScope.h"
>+
>+#include "DocumentFragment.h"
>+#include "Element.h"
>+#include "MutationRecord.h"
>+#include "Node.h"
>+#include "StaticNodeList.h"
>+#include <wtf/HashMap.h>
>+
>+namespace WebCore {
>+
>+// RecordAccumulator expects that all removals from a parent take place in order and precede
>+// any additions. If this is violated (i.e. because of code changes elsewhere in WebCore)
>+// it will likely result in both (a) ASSERTions failing, and (b) mutation records being
>+// enqueued for delivery before the outer-most scope closes.
>+class RecordAccumulator {
>+    WTF_MAKE_NONCOPYABLE(RecordAccumulator);
>+public:
>+    RecordAccumulator(PassRefPtr<Node>, Vector<WebKitMutationObserver*>&);
>+    ~RecordAccumulator();
>+
>+    void childAdded(PassRefPtr<Node>);
>+    void willRemoveChild(PassRefPtr<Node>);
>+    void enqueueMutationRecord();
>+
>+private:
>+    void clear();
>+    bool isEmpty();
>+
>+    RefPtr<Node> m_target;
>+
>+    Vector<RefPtr<Node> > m_removedNodes;
>+    Vector<RefPtr<Node> > m_addedNodes;
>+    RefPtr<Node> m_previousSibling;
>+    RefPtr<Node> m_nextSibling;
>+    RefPtr<Node> m_lastAdded;
>+
>+    Vector<WebKitMutationObserver*> m_observers;
>+};
>+
>+class AccumulationManager {
>+    WTF_MAKE_NONCOPYABLE(AccumulationManager);
>+public:
>+    ~AccumulationManager();
>+
>+    static AccumulationManager* instance();
>+
>+    void incrementScopingLevel(Node*);
>+    void decrementScopingLevel(Node*);
>+
>+    void childAdded(Node*, PassRefPtr<Node>);
>+    void willRemoveChild(Node*, PassRefPtr<Node>);
>+
>+private:
>+    AccumulationManager();
>+    static void initialize();
>+
>+    HashMap<Node*, unsigned> m_scopingLevels;
>+    HashMap<Node*, RecordAccumulator*> m_accumulations;
>+
>+    static AccumulationManager* s_instance;
>+};
>+
>+RecordAccumulator::RecordAccumulator(PassRefPtr<Node> target, Vector<WebKitMutationObserver*>& observers)
>+    : m_target(target)
>+{
>+    m_observers.swap(observers);
>+    clear();
>+}
>+
>+RecordAccumulator::~RecordAccumulator()
>+{
>+    ASSERT(isEmpty());
>+}
>+
>+void RecordAccumulator::childAdded(PassRefPtr<Node> prpChild)
>+{
>+    RefPtr<Node> child = prpChild;
>+
>+    // Additions must be in-order.
>+    if (!isEmpty() && (m_lastAdded.get() != child->previousSibling() || m_nextSibling != child->nextSibling()))
>+        enqueueMutationRecord();
>+
>+    if (isEmpty()) {
>+        m_previousSibling = child->previousSibling();
>+        m_nextSibling = child->nextSibling();
>+    }
>+
>+    m_addedNodes.append(child);
>+    m_lastAdded = child;
>+}
>+
>+// See comment on the class about ASSERT assumptions.
>+void RecordAccumulator::willRemoveChild(PassRefPtr<Node> prpChild)
>+{
>+    RefPtr<Node> child = prpChild;
>+    ASSERT(m_addedNodes.isEmpty()); // Removals must precede additions.
>+    if (!m_addedNodes.isEmpty())
>+        enqueueMutationRecord();
>+
>+    ASSERT(isEmpty() || m_nextSibling.get() == child); // Removals must be continuous and in-order.
>+    if (!isEmpty() && m_nextSibling.get() != child)
>+        enqueueMutationRecord();
>+
>+    if (isEmpty()) {
>+        m_previousSibling = child->previousSibling();
>+        m_nextSibling = child->nextSibling();
>+        m_lastAdded = child->previousSibling();
>+    } else
>+        m_nextSibling = child->nextSibling();
>+
>+    m_removedNodes.append(child);
>+}
>+
>+void RecordAccumulator::enqueueMutationRecord()
>+{
>+    ASSERT(!isEmpty());
>+    if (isEmpty()) {
>+        clear();
>+        return;
>+    }
>+
>+    RefPtr<MutationRecord> mutation = MutationRecord::createChildList(m_target,
>+                                                                      StaticNodeList::adopt(m_addedNodes),
>+                                                                      StaticNodeList::adopt(m_removedNodes),
>+                                                                      m_previousSibling,
>+                                                                      m_nextSibling);
>+    for (size_t i = 0; i < m_observers.size(); ++i)
>+        m_observers[i]->enqueueMutationRecord(mutation);
>+
>+    clear();
>+}
>+
>+void RecordAccumulator::clear()
>+{
>+    if (!m_removedNodes.isEmpty())
>+        m_removedNodes.clear();
>+    if (!m_addedNodes.isEmpty())
>+        m_addedNodes.clear();
>+    m_previousSibling = 0;
>+    m_nextSibling = 0;
>+    m_lastAdded = 0;
>+}
>+
>+bool RecordAccumulator::isEmpty()
>+{
>+    return m_removedNodes.isEmpty() && m_addedNodes.isEmpty();
>+}
>+
>+AccumulationManager* AccumulationManager::s_instance = 0;
>+
>+AccumulationManager::AccumulationManager()
>+{
>+}
>+
>+AccumulationManager::~AccumulationManager()
>+{
>+    ASSERT(m_scopingLevels.isEmpty());
>+    ASSERT(m_accumulations.isEmpty());
>+}
>+
>+void AccumulationManager::initialize()
>+{
>+    ASSERT(!s_instance);
>+    s_instance = adoptPtr(new AccumulationManager).leakPtr();
>+}
>+
>+
>+AccumulationManager* AccumulationManager::instance()
>+{
>+    if (!s_instance)
>+        initialize();
>+
>+    return s_instance;
>+}
>+
>+void AccumulationManager::childAdded(Node* target, PassRefPtr<Node> child)
>+{
>+    ASSERT(m_accumulations.contains(target));
>+    RecordAccumulator* record = m_accumulations.get(target);
>+    if (record)
>+        record->childAdded(child);
>+}
>+
>+void AccumulationManager::willRemoveChild(Node* target, PassRefPtr<Node> child)
>+{
>+    ASSERT(m_accumulations.contains(target));
>+    RecordAccumulator* record = m_accumulations.get(target);
>+    if (record)
>+        record->willRemoveChild(child);
>+}
>+
>+void AccumulationManager::incrementScopingLevel(Node* target)
>+{
>+    if (m_scopingLevels.contains(target)) {
>+        m_scopingLevels.set(target, m_scopingLevels.get(target) + 1);
>+        return;
>+    }
>+
>+    m_scopingLevels.set(target, 1);
>+    Vector<WebKitMutationObserver*> observers;
>+    target->registeredMutationObserversOfType(observers, WebKitMutationObserver::ChildList);
>+    if (observers.isEmpty())
>+        m_accumulations.set(target, 0);
>+    else
>+        m_accumulations.set(target, new RecordAccumulator(target, observers));
>+}
>+
>+void AccumulationManager::decrementScopingLevel(Node* target)
>+{
>+    ASSERT(m_scopingLevels.contains(target));
>+    unsigned scopingLevel = m_scopingLevels.get(target) - 1;
>+
>+    if (scopingLevel > 0) {
>+        m_scopingLevels.set(target, scopingLevel);
>+        return;
>+    }
>+
>+    OwnPtr<RecordAccumulator> record = adoptPtr(m_accumulations.take(target));
>+    m_scopingLevels.remove(target);
>+
>+    if (record)
>+        record->enqueueMutationRecord();
>+}
>+
>+ChildListMutationScope::ChildListMutationScope(PassRefPtr<Node> target)
>+    : m_target(target)
>+{
>+    AccumulationManager::instance()->incrementScopingLevel(m_target.get());
>+}
>+
>+ChildListMutationScope::~ChildListMutationScope()
>+{
>+    AccumulationManager::instance()->decrementScopingLevel(m_target.get());
>+}
>+
>+void ChildListMutationScope::childAdded(PassRefPtr<Node> child)
>+{
>+    AccumulationManager::instance()->childAdded(m_target.get(), child);
>+}
>+
>+void ChildListMutationScope::willRemoveChild(PassRefPtr<Node> child)
>+{
>+    AccumulationManager::instance()->willRemoveChild(m_target.get(), child);
>+}
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(MUTATION_OBSERVERS)
>diff --git a/Source/WebCore/dom/MutationScope.h b/Source/WebCore/dom/MutationScope.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..5c60856c83b6dba2638cd307e75d77b24ab64c3b
>--- /dev/null
>+++ b/Source/WebCore/dom/MutationScope.h
>@@ -0,0 +1,61 @@
>+/*
>+ * Copyright (C) 2011 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:
>+ *
>+ *     * Redistributions of source code must retain the above copyright
>+ * notice, this list of conditions and the following disclaimer.
>+ *     * Redistributions in binary form must reproduce the above
>+ * copyright notice, this list of conditions and the following disclaimer
>+ * in the documentation and/or other materials provided with the
>+ * distribution.
>+ *     * Neither the name of Google Inc. nor the names of its
>+ * contributors may be used to endorse or promote products derived from
>+ * this software without specific prior written permission.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
>+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
>+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
>+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
>+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
>+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
>+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
>+ * DATA, OR 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.
>+ */
>+
>+#ifndef MutationScope_h
>+#define MutationScope_h
>+
>+#if ENABLE(MUTATION_OBSERVERS)
>+
>+#include <wtf/Noncopyable.h>
>+#include <wtf/PassRefPtr.h>
>+#include <wtf/RefPtr.h>
>+
>+namespace WebCore {
>+
>+class Node;
>+
>+class ChildListMutationScope {
>+    WTF_MAKE_NONCOPYABLE(ChildListMutationScope);
>+public:
>+    ChildListMutationScope(PassRefPtr<Node> target);
>+    ~ChildListMutationScope();
>+
>+    void childAdded(PassRefPtr<Node>);
>+    void willRemoveChild(PassRefPtr<Node>);
>+
>+private:
>+    RefPtr<Node> m_target;
>+};
>+
>+} // namespace WebCore
>+
>+#endif // ENABLE(MUTATION_OBSERVERS)
>+
>+#endif // MutationScope_h
>diff --git a/Source/WebCore/dom/Node.cpp b/Source/WebCore/dom/Node.cpp
>index 1f85fd912eadfd5a73159d6dede930e64849c940..c66ddcc784d22ea27b35cbe88a48c8381455a736 100644
>--- a/Source/WebCore/dom/Node.cpp
>+++ b/Source/WebCore/dom/Node.cpp
>@@ -66,6 +66,7 @@
> #include "Logging.h"
> #include "MouseEvent.h"
> #include "MutationEvent.h"
>+#include "MutationScope.h"
> #include "NameNodeList.h"
> #include "NamedNodeMap.h"
> #include "NodeRareData.h"
>@@ -2124,6 +2125,9 @@ void Node::setTextContent(const String& text, ExceptionCode& ec)
>         case DOCUMENT_FRAGMENT_NODE:
>         case SHADOW_ROOT_NODE: {
>             ContainerNode* container = toContainerNode(this);
>+#if ENABLE(MUTATION_OBSERVERS)
>+            ChildListMutationScope mutation(this);
>+#endif
>             container->removeChildren();
>             if (!text.isEmpty())
>                 container->appendChild(document()->createTextNode(text), ec);
>@@ -2694,9 +2698,9 @@ void Node::registeredMutationObserversOfType(Vector<WebKitMutationObserver*>& ob
>     if (!observerEntries || observerEntries->isEmpty())
>         return;
> 
>-    for (Vector<MutationObserverEntry>::iterator iter = observerEntries->begin(); iter != observerEntries->end(); ++iter) {
>-        if (iter->matches(type))
>-            observers.append(iter->observer.get());
>+    for (size_t i = 0; i < observerEntries->size(); ++i) {
>+        if ((*observerEntries)[i].matches(type))
>+            observers.append((*observerEntries)[i].observer.get());
>     }
> }
> 
>diff --git a/Source/WebCore/dom/WebKitMutationObserver.cpp b/Source/WebCore/dom/WebKitMutationObserver.cpp
>index 7d736ae7bac64c4588fcba2fc3d3b775297bde14..83f15990ea2beca339bb0a73cc2969ba4df29fa5 100644
>--- a/Source/WebCore/dom/WebKitMutationObserver.cpp
>+++ b/Source/WebCore/dom/WebKitMutationObserver.cpp
>@@ -65,8 +65,8 @@ void WebKitMutationObserver::observe(Node* node, MutationObserverOptions options
> 
> void WebKitMutationObserver::disconnect()
> {
>-    for (Vector<Node*>::iterator iter = m_observedNodes.begin(); iter !=  m_observedNodes.end(); ++iter)
>-        (*iter)->unregisterMutationObserver(this);
>+    for (size_t i = 0; i < m_observedNodes.size(); ++i)
>+        m_observedNodes[i]->unregisterMutationObserver(this);
> 
>     m_observedNodes.clear();
> }
>diff --git a/Source/WebCore/html/HTMLElement.cpp b/Source/WebCore/html/HTMLElement.cpp
>index 5912da07d76a492c6d73288a1434dd131e319804..5d40cd57ce56b787da35f299c99720c3f93936dc 100644
>--- a/Source/WebCore/html/HTMLElement.cpp
>+++ b/Source/WebCore/html/HTMLElement.cpp
>@@ -41,6 +41,7 @@
> #include "HTMLNames.h"
> #include "HTMLParserIdioms.h"
> #include "HTMLTextFormControlElement.h"
>+#include "MutationScope.h"
> #include "RenderWordBreak.h"
> #include "ScriptEventListener.h"
> #include "Settings.h"
>@@ -317,6 +318,10 @@ static inline bool hasOneTextChild(ContainerNode* node)
> 
> static void replaceChildrenWithFragment(HTMLElement* element, PassRefPtr<DocumentFragment> fragment, ExceptionCode& ec)
> {
>+#if ENABLE(MUTATION_OBSERVERS)
>+    ChildListMutationScope mutation(element);
>+#endif
>+
>     if (!fragment->firstChild()) {
>         element->removeChildren();
>         return;
>@@ -338,6 +343,10 @@ static void replaceChildrenWithFragment(HTMLElement* element, PassRefPtr<Documen
> 
> static void replaceChildrenWithText(HTMLElement* element, const String& text, ExceptionCode& ec)
> {
>+#if ENABLE(MUTATION_OBSERVERS)
>+    ChildListMutationScope mutation(element);
>+#endif
>+
>     if (hasOneTextChild(element)) {
>         static_cast<Text*>(element->firstChild())->setData(text, ec);
>         return;
>diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
>index 2c8398e31a7f69c2610e22aac572f6d04e756348..425e7c75d1b87893acef6a3f7dd47ff8e35a66ff 100644
>--- a/LayoutTests/ChangeLog
>+++ b/LayoutTests/ChangeLog
>@@ -1,3 +1,15 @@
>+2011-10-18  Rafael Weinstein  <rafaelw@chromium.org>
>+
>+        [MutationObservers] Implement WebKitMutationObserver.observe for childList changes
>+        https://bugs.webkit.org/show_bug.cgi?id=68955
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * fast/mutation/observe-attributes-expected.txt:
>+        * fast/mutation/observe-attributes.html:
>+        * fast/mutation/observe-childList-expected.txt: Added.
>+        * fast/mutation/observe-childList.html: Added.
>+
> 2011-10-19  Renata Hodovan  <reni@webkit.org>
> 
>         Add new renderer for SVGRectElement.
>diff --git a/LayoutTests/fast/mutation/observe-attributes-expected.txt b/LayoutTests/fast/mutation/observe-attributes-expected.txt
>index 9869fe2ee5b02c0e7768d81a332aafd3866ecc81..2f8598dff7a020ee3c727e9e37f986a6a2818695 100644
>--- a/LayoutTests/fast/mutation/observe-attributes-expected.txt
>+++ b/LayoutTests/fast/mutation/observe-attributes-expected.txt
>@@ -23,7 +23,7 @@ PASS mutations[1].attributeNamespace is null
> Testing that observing without specifying "attributes" does not result in hearing about attribute changes.
> PASS mutations is null
> 
>-Testing that re-observing the same node with the same observing has the effect of resetting the options.
>+Testing that re-observing the same node with the same observer has the effect of resetting the options.
> PASS calls is 1
> PASS mutations.length is 1
> PASS mutations[0].type is "attributes"
>diff --git a/LayoutTests/fast/mutation/observe-attributes.html b/LayoutTests/fast/mutation/observe-attributes.html
>index 646e3931d1450c1dcd4ace4a7ebe5103d88eb3be..85ec6774d6f5c7fd1ba5b9dcba7ba3bff8350066 100644
>--- a/LayoutTests/fast/mutation/observe-attributes.html
>+++ b/LayoutTests/fast/mutation/observe-attributes.html
>@@ -12,8 +12,7 @@
> <script>
> 
> window.jsTestIsAsync = true;
>-var mutations;
>-var mutations2;
>+var mutations, mutations2;
> var calls;
> 
> function testBasic() {
>@@ -109,7 +108,7 @@ function testMultipleRegistration() {
>     var observer;
> 
>     function start() {
>-        debug('Testing that re-observing the same node with the same observing has the effect of resetting the options.');
>+        debug('Testing that re-observing the same node with the same observer has the effect of resetting the options.');
>     
> 		calls = 0;
>         mutations = null;
>diff --git a/LayoutTests/fast/mutation/observe-childList-expected.txt b/LayoutTests/fast/mutation/observe-childList-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..40ad737f0712e63a6c3b42c1b2023aee019e0f81
>--- /dev/null
>+++ b/LayoutTests/fast/mutation/observe-childList-expected.txt
>@@ -0,0 +1,93 @@
>+Test WebKitMutationObserver.observe on attributes.
>+
>+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
>+
>+
>+Testing basic aspects of childList observation.
>+...can childList changes be observed at all
>+PASS mutations.length is 1
>+PASS mutations[0].type is "childList"
>+PASS mutations[0].addedNodes.length is 1
>+PASS mutations[0].addedNodes[0] is removedDiv1
>+...observer.disconnect() should prevent further delivery of mutations.
>+PASS mutations is null
>+...re-observing after disconnect works with the same observer.
>+PASS mutations.length is 2
>+PASS mutations[0].type is "childList"
>+PASS mutations[0].removedNodes.length is 1
>+PASS mutations[0].removedNodes[0] is removedDiv1
>+PASS mutations[1].type is "childList"
>+PASS mutations[1].removedNodes.length is 1
>+PASS mutations[1].removedNodes[0] is removedDiv2
>+
>+Testing that observing without specifying "childList" does not result in hearing about childList changes.
>+PASS mutations is null
>+
>+Testing that re-observing the same node with the same observer has the effect of resetting the options.
>+PASS calls is 1
>+PASS mutations.length is 1
>+PASS mutations[0].type is "childList"
>+PASS mutations is null
>+
>+Testing that multiple observers can be registered to a given node and both receive mutations.
>+PASS mutations.length is 1
>+PASS mutations[0].type is "childList"
>+PASS mutations2.length is 1
>+PASS mutations2[0].type is "childList"
>+
>+Testing that innerText and innerHTML always result in a single childList mutation.
>+...innerHTML
>+PASS mutations.length is 1
>+PASS mutations[0].type is "childList"
>+PASS mutations[0].addedNodes.length is 3
>+PASS mutations[0].addedNodes[0] is addedDiv1
>+PASS mutations[0].addedNodes[1] is addedDiv2
>+PASS mutations[0].addedNodes[2] is addedDiv3
>+PASS mutations[0].removedNodes.length is 2
>+PASS mutations[0].removedNodes[0] is removedDiv1
>+PASS mutations[0].removedNodes[1] is removedDiv2
>+...innerText
>+PASS mutations.length is 1
>+PASS mutations[0].type is "childList"
>+PASS mutations[0].addedNodes.length is 1
>+PASS mutations[0].removedNodes.length is 3
>+
>+Testing that replaceChild results in minimal childList mutations.
>+...innerHTML
>+PASS mutations.length is 1
>+PASS mutations[0].type is "childList"
>+PASS mutations[0].addedNodes.length is 1
>+PASS mutations[0].addedNodes[0] is addedDiv1
>+PASS mutations[0].removedNodes.length is 1
>+PASS mutations[0].removedNodes[0] is removedDiv1
>+...innerText
>+PASS mutations.length is 1
>+PASS mutations[0].type is "childList"
>+PASS mutations[0].addedNodes.length is 2
>+PASS mutations[0].addedNodes[0] is addedDiv1
>+PASS mutations[0].addedNodes[1] is addedDiv2
>+PASS mutations[0].removedNodes.length is 1
>+PASS mutations[0].removedNodes[0] is removedDiv1
>+
>+Testing that insertBefore results in minimal childList mutations.
>+...innerText
>+PASS mutations.length is 1
>+PASS mutations[0].type is "childList"
>+PASS mutations[0].addedNodes.length is 2
>+PASS mutations[0].addedNodes[0] is addedDiv1
>+PASS mutations[0].addedNodes[1] is addedDiv2
>+PASS mutations[0].removedNodes.length is 0
>+
>+Testing that appendChild results in minimal childList mutations.
>+...innerText
>+PASS mutations.length is 1
>+PASS mutations[0].type is "childList"
>+PASS mutations[0].addedNodes.length is 2
>+PASS mutations[0].addedNodes[0] is addedDiv1
>+PASS mutations[0].addedNodes[1] is addedDiv2
>+PASS mutations[0].removedNodes.length is 0
>+
>+PASS successfullyParsed is true
>+
>+TEST COMPLETE
>+
>diff --git a/LayoutTests/fast/mutation/observe-childList.html b/LayoutTests/fast/mutation/observe-childList.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..fab3b9b8d222937c6482c69ec0f5754bfcffc685
>--- /dev/null
>+++ b/LayoutTests/fast/mutation/observe-childList.html
>@@ -0,0 +1,411 @@
>+<!DOCTYPE html>
>+<html>
>+<head>
>+<meta charset="utf-8">
>+<link rel="stylesheet" href="../js/resources/js-test-style.css">
>+<script src="../js/resources/js-test-pre.js"></script>
>+<title></title>
>+</head>
>+<body>
>+<p id=description></p>
>+<div id="console"></div>
>+<script>
>+
>+window.jsTestIsAsync = true;
>+var mutations, mutations2;
>+var calls;
>+var div, removedDiv1, removedDiv2, addedDiv1, addedDiv2, addedDiv3;
>+
>+function testBasic() {
>+    var div;
>+    var observer;
>+
>+    function start() {
>+        debug('Testing basic aspects of childList observation.');
>+
>+        mutations = null;
>+        div = document.createElement('div');
>+        observer = new WebKitMutationObserver(function(m) {
>+            mutations = m;
>+        });
>+
>+        observer.observe(div, { childList: true });
>+        removedDiv1 = div.appendChild(document.createElement('div'));
>+        setTimeout(checkDisconnectAndMutate, 0);
>+    }
>+
>+    function checkDisconnectAndMutate() {
>+        debug('...can childList changes be observed at all');
>+
>+        shouldBe('mutations.length', '1');
>+        shouldBe('mutations[0].type', '"childList"');
>+        shouldBe('mutations[0].addedNodes.length', '1');
>+        shouldBe('mutations[0].addedNodes[0]', 'removedDiv1');
>+
>+        mutations = null;
>+        observer.disconnect();
>+        removedDiv1 = div.appendChild(document.createElement('div'));
>+        setTimeout(checkNotDeliveredAndMutateMultiple, 0);
>+    }
>+
>+    function checkNotDeliveredAndMutateMultiple() {
>+        debug('...observer.disconnect() should prevent further delivery of mutations.');
>+
>+        shouldBe('mutations', 'null');
>+        observer.observe(div, { childList: true });
>+        removedDiv1 = div.removeChild(div.firstChild);
>+        removedDiv2 = div.removeChild(div.firstChild);
>+        setTimeout(finish);
>+    }
>+
>+    function finish() {
>+        debug('...re-observing after disconnect works with the same observer.');
>+
>+        shouldBe('mutations.length', '2');
>+        shouldBe('mutations[0].type', '"childList"');
>+        shouldBe('mutations[0].removedNodes.length', '1');
>+        shouldBe('mutations[0].removedNodes[0]', 'removedDiv1');
>+        shouldBe('mutations[1].type', '"childList"');
>+        shouldBe('mutations[1].removedNodes.length', '1');
>+        shouldBe('mutations[1].removedNodes[0]', 'removedDiv2');
>+        observer.disconnect();
>+        debug('');
>+        runNextTest();
>+    }
>+
>+    start();
>+}
>+
>+function testWrongType() {
>+    var div;
>+    var observer;
>+
>+    function start() {
>+        debug('Testing that observing without specifying "childList" does not result in hearing about childList changes.');
>+
>+        mutations = null;
>+        div = document.createElement('div');
>+        observer = new WebKitMutationObserver(function(m) {
>+            mutations = m;
>+        });
>+
>+        observer.observe(div, { attributes: true, characterData: true });
>+        div.appendChild(document.createElement('div'));
>+        setTimeout(finish, 0);
>+    }
>+
>+    function finish() {
>+        shouldBe('mutations', 'null');
>+        observer.disconnect();
>+        debug('');
>+        runNextTest();
>+    }
>+
>+    start();
>+}
>+
>+function testMultipleRegistration() {
>+    var div;
>+    var observer;
>+
>+    function start() {
>+        debug('Testing that re-observing the same node with the same observer has the effect of resetting the options.');
>+
>+        calls = 0;
>+        mutations = null;
>+        div = document.createElement('div');
>+        observer = new WebKitMutationObserver(function(m) {
>+            mutations = m;
>+            calls++;
>+        });
>+
>+        observer.observe(div, { childList: true, characterData: true });
>+        observer.observe(div, { childList: true });
>+        div.appendChild(document.createElement('div'));
>+        setTimeout(checkDisconnectAndMutate, 0);
>+    }
>+
>+    function checkDisconnectAndMutate() {
>+        shouldBe('calls', '1');
>+        shouldBe('mutations.length', '1');
>+        shouldBe('mutations[0].type', '"childList"');
>+        mutations = null;
>+        observer.observe(div, { childList: true, characterData: true });
>+        observer.observe(div, { attributes: true });
>+        div.appendChild(document.createElement('div'));
>+        setTimeout(finish, 0);
>+    }
>+
>+    function finish() {
>+        shouldBe('mutations', 'null');
>+        observer.disconnect();
>+        debug('');
>+        runNextTest();
>+    }
>+
>+    start();
>+}
>+
>+function testMultipleObservers() {
>+    var div;
>+    var observer;
>+    var observer2;
>+
>+    function start() {
>+        debug('Testing that multiple observers can be registered to a given node and both receive mutations.');
>+        mutations = null;
>+        div = document.createElement('div');
>+        observer = new WebKitMutationObserver(function(m) {
>+            mutations = m;
>+        });
>+        observer2 = new WebKitMutationObserver(function(m) {
>+            mutations2 = m;
>+        });
>+        observer.observe(div, { childList: true });
>+        observer2.observe(div, { childList: true });
>+        div.appendChild(document.createElement('div'));
>+        setTimeout(finish, 0);
>+    }
>+
>+    function finish() {
>+        shouldBe('mutations.length', '1');
>+        shouldBe('mutations[0].type', '"childList"');
>+        shouldBe('mutations2.length', '1');
>+        shouldBe('mutations2[0].type', '"childList"');
>+        observer.disconnect();
>+        observer2.disconnect();
>+        debug('');
>+        runNextTest();
>+    }
>+
>+    start();
>+}
>+
>+function testInnerHTMLAndInnerText() {
>+    var div;
>+    var observer;
>+
>+    function start() {
>+        debug('Testing that innerText and innerHTML always result in a single childList mutation.');
>+
>+        mutations = null;
>+        div = document.createElement('div');
>+        div.innerHTML = '<span>Foo</span><div>Bar</div>';
>+        removedDiv1 = div.firstChild;
>+        removedDiv2 = removedDiv1.nextSibling;
>+        observer = new WebKitMutationObserver(function(m) {
>+            mutations = m;
>+        });
>+
>+        observer.observe(div, { childList: true });
>+        div.innerHTML = 'foo<img src="bar.png"><p>Baz</p>';
>+        addedDiv1 = div.childNodes[0];
>+        addedDiv2 = div.childNodes[1];
>+        addedDiv3 = div.childNodes[2];
>+        setTimeout(checkInnerHTML, 0);
>+    }
>+
>+    function checkInnerHTML() {
>+        debug('...innerHTML');
>+
>+        shouldBe('mutations.length', '1');
>+        shouldBe('mutations[0].type', '"childList"');
>+        shouldBe('mutations[0].addedNodes.length', '3');
>+        shouldBe('mutations[0].addedNodes[0]', 'addedDiv1');
>+        shouldBe('mutations[0].addedNodes[1]', 'addedDiv2');
>+        shouldBe('mutations[0].addedNodes[2]', 'addedDiv3');
>+        shouldBe('mutations[0].removedNodes.length', '2');
>+        shouldBe('mutations[0].removedNodes[0]', 'removedDiv1');
>+        shouldBe('mutations[0].removedNodes[1]', 'removedDiv2');
>+
>+        mutations = null;
>+        div.innerText = 'foo';
>+        setTimeout(finish, 0);
>+    }
>+
>+    function finish() {
>+        debug('...innerText');
>+
>+        shouldBe('mutations.length', '1');
>+        shouldBe('mutations[0].type', '"childList"');
>+        shouldBe('mutations[0].addedNodes.length', '1');
>+        shouldBe('mutations[0].removedNodes.length', '3');
>+        observer.disconnect();
>+        debug('');
>+        runNextTest();
>+    }
>+
>+    start();
>+}
>+
>+function testReplaceChild() {
>+    var div;
>+    var observer;
>+    var fragment;
>+
>+    function start() {
>+        debug('Testing that replaceChild results in minimal childList mutations.');
>+
>+        mutations = null;
>+        div = document.createElement('div');
>+        div.innerHTML = '<span>Foo</span><div>Bar</div>';
>+        removedDiv1 = div.firstChild;
>+
>+        observer = new WebKitMutationObserver(function(m) {
>+            mutations = m;
>+        });
>+
>+        observer.observe(div, { childList: true });
>+        addedDiv1 = document.createElement('div');
>+        div.replaceChild(addedDiv1, div.firstChild);
>+        setTimeout(checkReplaceWithNode, 0);
>+    }
>+
>+    function checkReplaceWithNode() {
>+        debug('...innerHTML');
>+
>+        shouldBe('mutations.length', '1');
>+        shouldBe('mutations[0].type', '"childList"');
>+        shouldBe('mutations[0].addedNodes.length', '1');
>+        shouldBe('mutations[0].addedNodes[0]', 'addedDiv1');
>+        shouldBe('mutations[0].removedNodes.length', '1');
>+        shouldBe('mutations[0].removedNodes[0]', 'removedDiv1');
>+
>+        mutations = null;
>+        fragment = document.createDocumentFragment();
>+        addedDiv1 = fragment.appendChild(document.createElement('div'));
>+        addedDiv2 = fragment.appendChild(document.createElement('div'));
>+        removedDiv1 = div.firstChild;
>+
>+        div.replaceChild(fragment, removedDiv1);
>+
>+        setTimeout(finish, 0);
>+    }
>+
>+    function finish() {
>+        debug('...innerText');
>+
>+        shouldBe('mutations.length', '1');
>+        shouldBe('mutations[0].type', '"childList"');
>+        shouldBe('mutations[0].addedNodes.length', '2');
>+        shouldBe('mutations[0].addedNodes[0]', 'addedDiv1');
>+        shouldBe('mutations[0].addedNodes[1]', 'addedDiv2');
>+        shouldBe('mutations[0].removedNodes.length', '1');
>+        shouldBe('mutations[0].removedNodes[0]', 'removedDiv1');
>+
>+        observer.disconnect();
>+        debug('');
>+        runNextTest();
>+    }
>+
>+    start();
>+}
>+
>+function testInsertBefore() {
>+    var div;
>+    var observer;
>+    var fragment;
>+
>+    function start() {
>+        debug('Testing that insertBefore results in minimal childList mutations.');
>+
>+        mutations = null;
>+        div = document.createElement('div');
>+        div.innerHTML = '<span>Foo</span>';
>+        fragment = document.createDocumentFragment();
>+        addedDiv1 = fragment.appendChild(document.createElement('div'));
>+        addedDiv2 = fragment.appendChild(document.createElement('div'));
>+
>+        observer = new WebKitMutationObserver(function(m) {
>+            mutations = m;
>+        });
>+
>+        observer.observe(div, { childList: true });
>+        div.insertBefore(fragment, div.firstChild);
>+        setTimeout(finish, 0);
>+    }
>+
>+
>+    function finish() {
>+        debug('...innerText');
>+
>+        shouldBe('mutations.length', '1');
>+        shouldBe('mutations[0].type', '"childList"');
>+        shouldBe('mutations[0].addedNodes.length', '2');
>+        shouldBe('mutations[0].addedNodes[0]', 'addedDiv1');
>+        shouldBe('mutations[0].addedNodes[1]', 'addedDiv2');
>+        shouldBe('mutations[0].removedNodes.length', '0');
>+
>+        observer.disconnect();
>+        debug('');
>+        runNextTest();
>+    }
>+
>+    start();
>+}
>+
>+function testAppendChild() {
>+    var div;
>+    var observer;
>+    var fragment;
>+
>+    function start() {
>+        debug('Testing that appendChild results in minimal childList mutations.');
>+
>+        mutations = null;
>+        div = document.createElement('div');
>+        div.innerHTML = '<span>Foo</span>';
>+        fragment = document.createDocumentFragment();
>+        addedDiv1 = fragment.appendChild(document.createElement('div'));
>+        addedDiv2 = fragment.appendChild(document.createElement('div'));
>+
>+        observer = new WebKitMutationObserver(function(m) {
>+            mutations = m;
>+        });
>+
>+        observer.observe(div, { childList: true });
>+        div.appendChild(fragment);
>+        setTimeout(finish, 0);
>+    }
>+
>+    function finish() {
>+        debug('...innerText');
>+
>+        shouldBe('mutations.length', '1');
>+        shouldBe('mutations[0].type', '"childList"');
>+        shouldBe('mutations[0].addedNodes.length', '2');
>+        shouldBe('mutations[0].addedNodes[0]', 'addedDiv1');
>+        shouldBe('mutations[0].addedNodes[1]', 'addedDiv2');
>+        shouldBe('mutations[0].removedNodes.length', '0');
>+
>+        observer.disconnect();
>+        debug('');
>+        runNextTest();
>+    }
>+
>+    start();
>+}
>+
>+var tests = [testBasic, testWrongType, testMultipleRegistration, testMultipleObservers, testInnerHTMLAndInnerText, testReplaceChild, testInsertBefore, testAppendChild];
>+var testIndex = 0;
>+ 
>+function runNextTest() {
>+    if (testIndex < tests.length)
>+        tests[testIndex++]();
>+    else
>+        finishJSTest();
>+}
>+
>+description('Test WebKitMutationObserver.observe on attributes.');
>+
>+if (!window.WebKitMutationObserver)
>+    testFailed('This test requires ENABLE(MUTATION_OBSERVERS)');
>+else
>+    runNextTest();
>+
>+var successfullyParsed = true;
>+
>+</script>
>+<script src="../js/resources/js-test-post.js"></script>
>+</body>
>+</html>

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Attachments on bug 68955: 111531 | 111535 | 111559 | 111625 | 111650 | 111656 | 111864 | 111869 | 111991 | 111995 | 112000