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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/163465">163465</a></dd>
<dt>Author</dt> <dd>mmaxfield@apple.com</dd>
<dt>Date</dt> <dd>2014-02-05 12:04:59 -0800 (Wed, 05 Feb 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>Move characterAt index checks from InlineIterator to RenderText
https://bugs.webkit.org/show_bug.cgi?id=128224
Source/WebCore:
Reviewed by Simon Fraser.
Move characterAt index checks from InlineIterator to RenderText
so that all RenderText calls are covered. Few safe instances are
now covered with uncheckedCharacterAt.
Merged from Blink:
http://src.chromium.org/viewvc/blink?view=revision&revision=150830
Test: fast/text/character-at-crash.html
* rendering/InlineIterator.h:
(WebCore::InlineIterator::characterAt):
* rendering/RenderText.cpp:
(WebCore::RenderText::computePreferredLogicalWidths):
* rendering/RenderText.h:
(WebCore::RenderText::operator[]):
(WebCore::RenderText::uncheckedCharacterAt):
(WebCore::RenderText::characterAt):
LayoutTests:
Move characterAt index checks from InlineIterator to RenderText
so that all RenderText calls are covered. Few safe instances are
now covered with uncheckedCharacterAt.
Merged from Blink:
http://src.chromium.org/viewvc/blink?view=revision&revision=150830
Reviewed by Simon Fraser.
* fast/text/character-at-crash-expected.txt: Added.
* fast/text/character-at-crash.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="#trunkSourceWebCorerenderingInlineIteratorh">trunk/Source/WebCore/rendering/InlineIterator.h</a></li>
<li><a href="#trunkSourceWebCorerenderingRenderTextcpp">trunk/Source/WebCore/rendering/RenderText.cpp</a></li>
<li><a href="#trunkSourceWebCorerenderingRenderTexth">trunk/Source/WebCore/rendering/RenderText.h</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsfasttextcharacteratcrashexpectedtxt">trunk/LayoutTests/fast/text/character-at-crash-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfasttextcharacteratcrashhtml">trunk/LayoutTests/fast/text/character-at-crash.html</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (163464 => 163465)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog        2014-02-05 20:04:40 UTC (rev 163464)
+++ trunk/LayoutTests/ChangeLog        2014-02-05 20:04:59 UTC (rev 163465)
</span><span class="lines">@@ -1,3 +1,20 @@
</span><ins>+2014-02-04 Myles C. Maxfield <mmaxfield@apple.com>
+
+ Move characterAt index checks from InlineIterator to RenderText
+ https://bugs.webkit.org/show_bug.cgi?id=128224
+
+ Move characterAt index checks from InlineIterator to RenderText
+ so that all RenderText calls are covered. Few safe instances are
+ now covered with uncheckedCharacterAt.
+
+ Merged from Blink:
+ http://src.chromium.org/viewvc/blink?view=revision&revision=150830
+
+ Reviewed by Simon Fraser.
+
+ * fast/text/character-at-crash-expected.txt: Added.
+ * fast/text/character-at-crash.html: Added.
+
</ins><span class="cx"> 2014-02-05 Michał Pakuła vel Rutka <m.pakula@samsung.com>
</span><span class="cx">
</span><span class="cx"> Unreviewed EFL gardening
</span></span></pre></div>
<a id="trunkLayoutTestsfasttextcharacteratcrashexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/text/character-at-crash-expected.txt (0 => 163465)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/text/character-at-crash-expected.txt         (rev 0)
+++ trunk/LayoutTests/fast/text/character-at-crash-expected.txt        2014-02-05 20:04:59 UTC (rev 163465)
</span><span class="lines">@@ -0,0 +1 @@
</span><ins>+Pass. Test didn't crash.
</ins></span></pre></div>
<a id="trunkLayoutTestsfasttextcharacteratcrashhtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/text/character-at-crash.html (0 => 163465)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/text/character-at-crash.html         (rev 0)
+++ trunk/LayoutTests/fast/text/character-at-crash.html        2014-02-05 20:04:59 UTC (rev 163465)
</span><span class="lines">@@ -0,0 +1,22 @@
</span><ins>+<!DOCTYPE html>
+<html>
+<style>
+div {
+ -webkit-writing-mode: vertical-lr;
+ -webkit-text-combine: horizontal;
+ height: 7px;
+ white-space: pre-wrap;
+}
+</style>
+<div>
+foo
+ <script></script>
+ <script></script>
+</div>
+<script>
+if (window.testRunner)
+ testRunner.dumpAsText();
+document.documentElement.offsetTop;
+document.documentElement.innerHTML = "Pass. Test didn't crash.";
+</script>
+</html>
</ins></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (163464 => 163465)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2014-02-05 20:04:40 UTC (rev 163464)
+++ trunk/Source/WebCore/ChangeLog        2014-02-05 20:04:59 UTC (rev 163465)
</span><span class="lines">@@ -1,3 +1,28 @@
</span><ins>+2014-02-04 Myles C. Maxfield <mmaxfield@apple.com>
+
+ Move characterAt index checks from InlineIterator to RenderText
+ https://bugs.webkit.org/show_bug.cgi?id=128224
+
+ Reviewed by Simon Fraser.
+
+ Move characterAt index checks from InlineIterator to RenderText
+ so that all RenderText calls are covered. Few safe instances are
+ now covered with uncheckedCharacterAt.
+
+ Merged from Blink:
+ http://src.chromium.org/viewvc/blink?view=revision&revision=150830
+
+ Test: fast/text/character-at-crash.html
+
+ * rendering/InlineIterator.h:
+ (WebCore::InlineIterator::characterAt):
+ * rendering/RenderText.cpp:
+ (WebCore::RenderText::computePreferredLogicalWidths):
+ * rendering/RenderText.h:
+ (WebCore::RenderText::operator[]):
+ (WebCore::RenderText::uncheckedCharacterAt):
+ (WebCore::RenderText::characterAt):
+
</ins><span class="cx"> 2014-02-05 Andreas Kling <akling@apple.com>
</span><span class="cx">
</span><span class="cx"> Remove leftover seamless iframe logic from containerForRepaint().
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingInlineIteratorh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/InlineIterator.h (163464 => 163465)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/InlineIterator.h        2014-02-05 20:04:40 UTC (rev 163464)
+++ trunk/Source/WebCore/rendering/InlineIterator.h        2014-02-05 20:04:59 UTC (rev 163465)
</span><span class="lines">@@ -375,11 +375,7 @@
</span><span class="cx"> if (!m_renderer || !m_renderer->isText())
</span><span class="cx"> return 0;
</span><span class="cx">
</span><del>- RenderText* text = toRenderText(m_renderer);
- if (index >= text->textLength())
- return 0;
-
- return text->characterAt(index);
</del><ins>+ return toRenderText(m_renderer)->characterAt(index);
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> inline UChar InlineIterator::current() const
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingRenderTextcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/RenderText.cpp (163464 => 163465)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/RenderText.cpp        2014-02-05 20:04:40 UTC (rev 163464)
+++ trunk/Source/WebCore/rendering/RenderText.cpp        2014-02-05 20:04:59 UTC (rev 163465)
</span><span class="lines">@@ -722,7 +722,7 @@
</span><span class="cx"> bool breakAll = (style.wordBreak() == BreakAllWordBreak || style.wordBreak() == BreakWordBreak) && style.autoWrap();
</span><span class="cx">
</span><span class="cx"> for (int i = 0; i < len; i++) {
</span><del>- UChar c = characterAt(i);
</del><ins>+ UChar c = uncheckedCharacterAt(i);
</ins><span class="cx">
</span><span class="cx"> bool previousCharacterIsSpace = isSpace;
</span><span class="cx">
</span><span class="lines">@@ -774,7 +774,7 @@
</span><span class="cx"> j++;
</span><span class="cx"> if (j == len)
</span><span class="cx"> break;
</span><del>- c = characterAt(j);
</del><ins>+ c = uncheckedCharacterAt(j);
</ins><span class="cx"> if (isBreakable(breakIterator, j, nextBreakable, breakNBSP) && characterAt(j - 1) != softHyphen)
</span><span class="cx"> break;
</span><span class="cx"> if (breakAll) {
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingRenderTexth"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/RenderText.h (163464 => 163465)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/RenderText.h        2014-02-05 20:04:40 UTC (rev 163464)
+++ trunk/Source/WebCore/rendering/RenderText.h        2014-02-05 20:04:59 UTC (rev 163465)
</span><span class="lines">@@ -78,8 +78,9 @@
</span><span class="cx"> const LChar* characters8() const { return m_text.impl()->characters8(); }
</span><span class="cx"> const UChar* characters16() const { return m_text.impl()->characters16(); }
</span><span class="cx"> const UChar* deprecatedCharacters() const { return m_text.impl()->deprecatedCharacters(); }
</span><del>- UChar characterAt(unsigned i) const { return is8Bit() ? characters8()[i] : characters16()[i]; }
- UChar operator[](unsigned i) const { return characterAt(i); }
</del><ins>+ UChar characterAt(unsigned) const;
+ UChar uncheckedCharacterAt(unsigned) const;
+ UChar operator[](unsigned i) const { return uncheckedCharacterAt(i); }
</ins><span class="cx"> unsigned textLength() const { return m_text.impl()->length(); } // non virtual implementation of length()
</span><span class="cx"> void positionLineBox(InlineTextBox&);
</span><span class="cx">
</span><span class="lines">@@ -217,6 +218,20 @@
</span><span class="cx"> RenderTextLineBoxes m_lineBoxes;
</span><span class="cx"> };
</span><span class="cx">
</span><ins>+inline UChar RenderText::uncheckedCharacterAt(unsigned i) const
+{
+ ASSERT_WITH_SECURITY_IMPLICATION(i < textLength());
+ return is8Bit() ? characters8()[i] : characters16()[i];
+}
+
+inline UChar RenderText::characterAt(unsigned i) const
+{
+ if (i >= textLength())
+ return 0;
+
+ return uncheckedCharacterAt(i);
+}
+
</ins><span class="cx"> template <> inline bool isRendererOfType<const RenderText>(const RenderObject& renderer) { return renderer.isText(); }
</span><span class="cx"> RENDER_OBJECT_TYPE_CASTS(RenderText, isText())
</span><span class="cx">
</span></span></pre>
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