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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/165138">165138</a></dd>
<dt>Author</dt> <dd>ddkilzer@apple.com</dd>
<dt>Date</dt> <dd>2014-03-05 16:05:55 -0800 (Wed, 05 Mar 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>Fix crash in CompositeEditCommand::cloneParagraphUnderNewElement()
<http://webkit.org/b/129751>
<rdar://problem/16237965>
Reviewed by Jon Honeycutt.
Merged from Blink (patch by Yuta Kitamura):
https://src.chromium.org/viewvc/blink?revision=168160&view=revision
http://crbug.com/345005
The root cause is CompositeEditCommand::moveParagraphWithClones() passing
two positions |start| and |end| which do not follow the document order,
i.e. in some situations |start| is located after |end| because of
the difference in affinity.
This patch fixes this crash by normalizing |end| to |start| in such situations.
It also adds an ASSERT that checks the relationship between |start| and |end|.
Source/WebCore:
Test: editing/execCommand/format-block-crash.html
* editing/CompositeEditCommand.cpp:
(WebCore::CompositeEditCommand::cloneParagraphUnderNewElement):
(WebCore::CompositeEditCommand::moveParagraphWithClones):
* editing/CompositeEditCommand.h:
LayoutTests:
* editing/execCommand/format-block-crash-expected.txt: Added.
* editing/execCommand/format-block-crash.html: Added.
* editing/execCommand/resources/format-block-crash-iframe.html: Added.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreeditingCompositeEditCommandcpp">trunk/Source/WebCore/editing/CompositeEditCommand.cpp</a></li>
<li><a href="#trunkSourceWebCoreeditingCompositeEditCommandh">trunk/Source/WebCore/editing/CompositeEditCommand.h</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestseditingexecCommandformatblockcrashexpectedtxt">trunk/LayoutTests/editing/execCommand/format-block-crash-expected.txt</a></li>
<li><a href="#trunkLayoutTestseditingexecCommandformatblockcrashhtml">trunk/LayoutTests/editing/execCommand/format-block-crash.html</a></li>
<li><a href="#trunkLayoutTestseditingexecCommandresourcesformatblockcrashiframehtml">trunk/LayoutTests/editing/execCommand/resources/format-block-crash-iframe.html</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (165137 => 165138)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog 2014-03-06 00:03:52 UTC (rev 165137)
+++ trunk/LayoutTests/ChangeLog 2014-03-06 00:05:55 UTC (rev 165138)
</span><span class="lines">@@ -1,3 +1,27 @@
</span><ins>+2014-03-05 David Kilzer <ddkilzer@apple.com>
+
+ Fix crash in CompositeEditCommand::cloneParagraphUnderNewElement()
+ <http://webkit.org/b/129751>
+ <rdar://problem/16237965>
+
+ Reviewed by Jon Honeycutt.
+
+ Merged from Blink (patch by Yuta Kitamura):
+ https://src.chromium.org/viewvc/blink?revision=168160&view=revision
+ http://crbug.com/345005
+
+ The root cause is CompositeEditCommand::moveParagraphWithClones() passing
+ two positions |start| and |end| which do not follow the document order,
+ i.e. in some situations |start| is located after |end| because of
+ the difference in affinity.
+
+ This patch fixes this crash by normalizing |end| to |start| in such situations.
+ It also adds an ASSERT that checks the relationship between |start| and |end|.
+
+ * editing/execCommand/format-block-crash-expected.txt: Added.
+ * editing/execCommand/format-block-crash.html: Added.
+ * editing/execCommand/resources/format-block-crash-iframe.html: Added.
+
</ins><span class="cx"> 2014-03-05 Radu Stavila <stavila@adobe.com>
</span><span class="cx">
</span><span class="cx"> [CSS Regions] Scrollable regions
</span></span></pre></div>
<a id="trunkLayoutTestseditingexecCommandformatblockcrashexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/editing/execCommand/format-block-crash-expected.txt (0 => 165138)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/editing/execCommand/format-block-crash-expected.txt (rev 0)
+++ trunk/LayoutTests/editing/execCommand/format-block-crash-expected.txt 2014-03-06 00:05:55 UTC (rev 165138)
</span><span class="lines">@@ -0,0 +1,11 @@
</span><ins>+Should not crash if we load a test case from crbug.com/345005.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS event.data is "FINISH"
+PASS Did not crash.
+PASS successfullyParsed is true
+
+TEST COMPLETE
+
</ins></span></pre></div>
<a id="trunkLayoutTestseditingexecCommandformatblockcrashhtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/editing/execCommand/format-block-crash.html (0 => 165138)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/editing/execCommand/format-block-crash.html (rev 0)
+++ trunk/LayoutTests/editing/execCommand/format-block-crash.html 2014-03-06 00:05:55 UTC (rev 165138)
</span><span class="lines">@@ -0,0 +1,28 @@
</span><ins>+<!DOCTYPE html>
+<html>
+<head>
+<title>FormatBlock crash</title>
+<script src="../../resources/js-test.js"></script>
+</head>
+<body>
+<script>
+description('Should not crash if we load a test case from crbug.com/345005.');
+
+window.jsTestIsAsync = true;
+
+window.addEventListener('message', didReceiveMessage, false);
+
+var iframe = document.createElement('iframe');
+iframe.src = 'resources/format-block-crash-iframe.html';
+document.body.appendChild(iframe);
+
+function didReceiveMessage(event)
+{
+ shouldBeEqualToString('event.data', 'FINISH');
+ document.body.removeChild(iframe);
+ testPassed('Did not crash.');
+ window.finishJSTest();
+}
+</script>
+</body>
+</html>
</ins></span></pre></div>
<a id="trunkLayoutTestseditingexecCommandresourcesformatblockcrashiframehtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/editing/execCommand/resources/format-block-crash-iframe.html (0 => 165138)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/editing/execCommand/resources/format-block-crash-iframe.html (rev 0)
+++ trunk/LayoutTests/editing/execCommand/resources/format-block-crash-iframe.html 2014-03-06 00:05:55 UTC (rev 165138)
</span><span class="lines">@@ -0,0 +1,29 @@
</span><ins>+<!DOCTYPE html>
+<html>
+<head>
+<title>FormatBlock crash test case</title>
+</head>
+<!-- This is a minified version of the clusterfuzz test case at https://code.google.com/p/chromium/issues/detail?id=345005 -->
+<body style="display: table-row;">
+<script>
+function run()
+{
+ document.designMode = 'on';
+ document.execCommand('SelectAll');
+ document.execCommand('FormatBlock', false, '<' + 'div>');
+ window.setTimeout(notifyFinish, 0);
+}
+
+function notifyFinish()
+{
+ window.parent.postMessage('FINISH', '*');
+}
+
+window.setTimeout(run, 0);
+</script>
+<span contenteditable="true" style="display: table-caption;"></span>
+<span></span>
+<div style="display: -webkit-inline-box;"><span><span>B</span></span></div>
+<div></div>
+</body>
+</html>
</ins></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (165137 => 165138)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog 2014-03-06 00:03:52 UTC (rev 165137)
+++ trunk/Source/WebCore/ChangeLog 2014-03-06 00:05:55 UTC (rev 165138)
</span><span class="lines">@@ -1,3 +1,30 @@
</span><ins>+2014-03-05 David Kilzer <ddkilzer@apple.com>
+
+ Fix crash in CompositeEditCommand::cloneParagraphUnderNewElement()
+ <http://webkit.org/b/129751>
+ <rdar://problem/16237965>
+
+ Reviewed by Jon Honeycutt.
+
+ Merged from Blink (patch by Yuta Kitamura):
+ https://src.chromium.org/viewvc/blink?revision=168160&view=revision
+ http://crbug.com/345005
+
+ The root cause is CompositeEditCommand::moveParagraphWithClones() passing
+ two positions |start| and |end| which do not follow the document order,
+ i.e. in some situations |start| is located after |end| because of
+ the difference in affinity.
+
+ This patch fixes this crash by normalizing |end| to |start| in such situations.
+ It also adds an ASSERT that checks the relationship between |start| and |end|.
+
+ Test: editing/execCommand/format-block-crash.html
+
+ * editing/CompositeEditCommand.cpp:
+ (WebCore::CompositeEditCommand::cloneParagraphUnderNewElement):
+ (WebCore::CompositeEditCommand::moveParagraphWithClones):
+ * editing/CompositeEditCommand.h:
+
</ins><span class="cx"> 2014-03-05 Radu Stavila <stavila@adobe.com>
</span><span class="cx">
</span><span class="cx"> [CSS Regions] Scrollable regions
</span></span></pre></div>
<a id="trunkSourceWebCoreeditingCompositeEditCommandcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/editing/CompositeEditCommand.cpp (165137 => 165138)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/editing/CompositeEditCommand.cpp 2014-03-06 00:03:52 UTC (rev 165137)
+++ trunk/Source/WebCore/editing/CompositeEditCommand.cpp 2014-03-06 00:05:55 UTC (rev 165138)
</span><span class="lines">@@ -1048,8 +1048,10 @@
</span><span class="cx"> // Clone the paragraph between start and end under blockElement,
</span><span class="cx"> // preserving the hierarchy up to outerNode.
</span><span class="cx">
</span><del>-void CompositeEditCommand::cloneParagraphUnderNewElement(Position& start, Position& end, Node* passedOuterNode, Element* blockElement)
</del><ins>+void CompositeEditCommand::cloneParagraphUnderNewElement(const Position& start, const Position& end, Node* passedOuterNode, Element* blockElement)
</ins><span class="cx"> {
</span><ins>+ ASSERT(comparePositions(start, end) <= 0);
+
</ins><span class="cx"> // First we clone the outerNode
</span><span class="cx"> RefPtr<Node> lastNode;
</span><span class="cx"> RefPtr<Node> outerNode = passedOuterNode;
</span><span class="lines">@@ -1167,7 +1169,7 @@
</span><span class="cx"> // We upstream() the end and downstream() the start so that we don't include collapsed whitespace in the move.
</span><span class="cx"> // When we paste a fragment, spaces after the end and before the start are treated as though they were rendered.
</span><span class="cx"> Position start = startOfParagraphToMove.deepEquivalent().downstream();
</span><del>- Position end = endOfParagraphToMove.deepEquivalent().upstream();
</del><ins>+ Position end = startOfParagraphToMove == endOfParagraphToMove ? start : endOfParagraphToMove.deepEquivalent().upstream();
</ins><span class="cx">
</span><span class="cx"> cloneParagraphUnderNewElement(start, end, outerNode, blockElement);
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceWebCoreeditingCompositeEditCommandh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/editing/CompositeEditCommand.h (165137 => 165138)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/editing/CompositeEditCommand.h 2014-03-06 00:03:52 UTC (rev 165137)
+++ trunk/Source/WebCore/editing/CompositeEditCommand.h 2014-03-06 00:05:55 UTC (rev 165138)
</span><span class="lines">@@ -160,7 +160,7 @@
</span><span class="cx"> void moveParagraph(const VisiblePosition&, const VisiblePosition&, const VisiblePosition&, bool preserveSelection = false, bool preserveStyle = true);
</span><span class="cx"> void moveParagraphs(const VisiblePosition&, const VisiblePosition&, const VisiblePosition&, bool preserveSelection = false, bool preserveStyle = true);
</span><span class="cx"> void moveParagraphWithClones(const VisiblePosition& startOfParagraphToMove, const VisiblePosition& endOfParagraphToMove, Element* blockElement, Node* outerNode);
</span><del>- void cloneParagraphUnderNewElement(Position& start, Position& end, Node* outerNode, Element* blockElement);
</del><ins>+ void cloneParagraphUnderNewElement(const Position& start, const Position& end, Node* outerNode, Element* blockElement);
</ins><span class="cx"> void cleanupAfterDeletion(VisiblePosition destination = VisiblePosition());
</span><span class="cx">
</span><span class="cx"> bool breakOutOfEmptyListItem();
</span></span></pre>
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