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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/190667">190667</a></dd>
<dt>Author</dt> <dd>simon.fraser@apple.com</dd>
<dt>Date</dt> <dd>2015-10-07 08:09:02 -0700 (Wed, 07 Oct 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>will-change should trigger stacking context based purely on properties
https://bugs.webkit.org/show_bug.cgi?id=148068
Reviewed by Zalan Bujtas.
Source/WebCore:
Previously, our will-change implementation didn't trigger stacking context
on an inline if the will-change property didn't apply to inlines (like 'transform').
However, this doesn't agree with the CSS-WG consensus (https://lists.w3.org/Archives/Public/www-style/2015Sep/0112.html).
Change behavior to have stacking context creation behavior for will-change be
identical for inlines and blocks.
Test: fast/css/will-change/will-change-creates-stacking-context-inline.html
* rendering/RenderInline.cpp:
(WebCore::inFlowPositionedInlineAncestor):
* rendering/RenderInline.h:
(WebCore::RenderInline::willChangeCreatesStackingContext):
* rendering/style/WillChangeData.cpp:
(WebCore::propertyCreatesStackingContext):
(WebCore::WillChangeData::addFeature):
(WebCore::propertyCreatesStackingContextOnBoxesOnly): Deleted.
* rendering/style/WillChangeData.h:
(WebCore::WillChangeData::canCreateStackingContextOnInline): Deleted.
LayoutTests:
Previously, our will-change implementation didn't trigger stacking context
on an inline if the will-change property didn't apply to inlines (like 'transform').
However, this doesn't agree with the CSS-WG consensus (https://lists.w3.org/Archives/Public/www-style/2015Sep/0112.html).
Change behavior to have stacking context creation behavior for will-change be
identical for inlines and blocks.
* platform/mac/TestExpectations: Fails on Mavericks because no backdrop-filter there.
* fast/css/will-change/resources/will-change-stacking-helper.js:
(makeStackingInline):
* fast/css/will-change/will-change-creates-stacking-context-inline-expected.html: Added.
* fast/css/will-change/will-change-creates-stacking-context-inline.html: Added.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkLayoutTestsfastcsswillchangeresourceswillchangestackinghelperjs">trunk/LayoutTests/fast/css/will-change/resources/will-change-stacking-helper.js</a></li>
<li><a href="#trunkLayoutTestsfastcsswillchangewillchangecreatesstackingcontextexpectedhtml">trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-expected.html</a></li>
<li><a href="#trunkLayoutTestsfastcsswillchangewillchangecreatesstackingcontexthtml">trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context.html</a></li>
<li><a href="#trunkLayoutTestsplatformmacTestExpectations">trunk/LayoutTests/platform/mac/TestExpectations</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorerenderingRenderInlinecpp">trunk/Source/WebCore/rendering/RenderInline.cpp</a></li>
<li><a href="#trunkSourceWebCorerenderingRenderInlineh">trunk/Source/WebCore/rendering/RenderInline.h</a></li>
<li><a href="#trunkSourceWebCorerenderingstyleWillChangeDatacpp">trunk/Source/WebCore/rendering/style/WillChangeData.cpp</a></li>
<li><a href="#trunkSourceWebCorerenderingstyleWillChangeDatah">trunk/Source/WebCore/rendering/style/WillChangeData.h</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsfastcsswillchangewillchangecreatesstackingcontextinlineexpectedhtml">trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-inline-expected.html</a></li>
<li><a href="#trunkLayoutTestsfastcsswillchangewillchangecreatesstackingcontextinlinehtml">trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-inline.html</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (190666 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog 2015-10-07 14:59:11 UTC (rev 190666)
+++ trunk/LayoutTests/ChangeLog 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -1,3 +1,23 @@
</span><ins>+2015-10-06 Simon Fraser <simon.fraser@apple.com>
+
+ will-change should trigger stacking context based purely on properties
+ https://bugs.webkit.org/show_bug.cgi?id=148068
+
+ Reviewed by Zalan Bujtas.
+
+ Previously, our will-change implementation didn't trigger stacking context
+ on an inline if the will-change property didn't apply to inlines (like 'transform').
+ However, this doesn't agree with the CSS-WG consensus (https://lists.w3.org/Archives/Public/www-style/2015Sep/0112.html).
+
+ Change behavior to have stacking context creation behavior for will-change be
+ identical for inlines and blocks.
+
+ * platform/mac/TestExpectations: Fails on Mavericks because no backdrop-filter there.
+ * fast/css/will-change/resources/will-change-stacking-helper.js:
+ (makeStackingInline):
+ * fast/css/will-change/will-change-creates-stacking-context-inline-expected.html: Added.
+ * fast/css/will-change/will-change-creates-stacking-context-inline.html: Added.
+
</ins><span class="cx"> 2015-10-07 Hunseop Jeong <hs85.jeong@samsung.com>
</span><span class="cx">
</span><span class="cx"> [EFL] fast/repaint/block-inputrange-repaint.html is failed.
</span></span></pre></div>
<a id="trunkLayoutTestsfastcsswillchangeresourceswillchangestackinghelperjs"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/fast/css/will-change/resources/will-change-stacking-helper.js (190666 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/will-change/resources/will-change-stacking-helper.js 2015-10-07 14:59:11 UTC (rev 190666)
+++ trunk/LayoutTests/fast/css/will-change/resources/will-change-stacking-helper.js 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -27,7 +27,7 @@
</span><span class="cx"> { 'property' : '-webkit-flow-from', 'stacking' : true },
</span><span class="cx"> ];
</span><span class="cx">
</span><del>-function makeStackingBlock(stackingProperty, value)
</del><ins>+function makeStackingElement(stackingProperty, value)
</ins><span class="cx"> {
</span><span class="cx"> var container = document.createElement('div');
</span><span class="cx"> container.className = 'container';
</span><span class="lines">@@ -48,4 +48,3 @@
</span><span class="cx">
</span><span class="cx"> document.body.appendChild(container);
</span><span class="cx"> }
</span><del>-
</del></span></pre></div>
<a id="trunkLayoutTestsfastcsswillchangewillchangecreatesstackingcontextexpectedhtml"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-expected.html (190666 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-expected.html 2015-10-07 14:59:11 UTC (rev 190666)
+++ trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-expected.html 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -45,7 +45,7 @@
</span><span class="cx"> function doTest()
</span><span class="cx"> {
</span><span class="cx"> for (value of willChangeValues) {
</span><del>- makeStackingBlock('z-index', value.stacking ? '0' : 'auto');
</del><ins>+ makeStackingElement('z-index', value.stacking ? '0' : 'auto');
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre></div>
<a id="trunkLayoutTestsfastcsswillchangewillchangecreatesstackingcontextinlineexpectedhtmlfromrev190666trunkLayoutTestsfastcsswillchangewillchangecreatesstackingcontextexpectedhtml"></a>
<div class="copfile"><h4>Copied: trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-inline-expected.html (from rev 190666, trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-expected.html) (0 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-inline-expected.html (rev 0)
+++ trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-inline-expected.html 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -0,0 +1,58 @@
</span><ins>+<!DOCTYPE html>
+
+<html>
+<head>
+ <style>
+ .container {
+ display: inline-block;
+ margin: 25px;
+ width: 50px;
+ height: 50px;
+ position: relative;
+ border: 1px solid black;
+ }
+
+ .container div {
+ width: 100%;
+ height: 100%;
+ }
+
+ .potential-stacking-context {
+ z-index: auto;
+ background-color: silver;
+ display: inline;
+ padding: 20px;
+ }
+
+ .child {
+ position: absolute;
+ top: 10px;
+ left: 10px;
+ z-index: 1;
+ background-color: orange;
+ }
+
+ .interposer {
+ position: absolute;
+ top: 20px;
+ left: 20px;
+ z-index: 0;
+ background-color: green;
+ }
+ </style>
+
+ <script src="resources/will-change-stacking-helper.js"></script>
+ <script>
+ function doTest()
+ {
+ for (value of willChangeValues) {
+ makeStackingElement('opacity', value.stacking ? '0.999999' : '1');
+ }
+ }
+
+ window.addEventListener('load', doTest, false);
+ </script>
+</head>
+<body>
+</body>
+</html>
</ins></span></pre></div>
<a id="trunkLayoutTestsfastcsswillchangewillchangecreatesstackingcontextinlinehtmlfromrev190666trunkLayoutTestsfastcsswillchangewillchangecreatesstackingcontextexpectedhtml"></a>
<div class="copfile"><h4>Copied: trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-inline.html (from rev 190666, trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-expected.html) (0 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-inline.html (rev 0)
+++ trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context-inline.html 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -0,0 +1,58 @@
</span><ins>+<!DOCTYPE html>
+
+<html>
+<head>
+ <style>
+ .container {
+ display: inline-block;
+ margin: 25px;
+ width: 50px;
+ height: 50px;
+ position: relative;
+ border: 1px solid black;
+ }
+
+ .container div {
+ width: 100%;
+ height: 100%;
+ }
+
+ .potential-stacking-context {
+ z-index: auto;
+ background-color: silver;
+ display: inline;
+ padding: 20px;
+ }
+
+ .child {
+ position: absolute;
+ top: 10px;
+ left: 10px;
+ z-index: 1;
+ background-color: orange;
+ }
+
+ .interposer {
+ position: absolute;
+ top: 20px;
+ left: 20px;
+ z-index: 0;
+ background-color: green;
+ }
+ </style>
+
+ <script src="resources/will-change-stacking-helper.js"></script>
+ <script>
+ function doTest()
+ {
+ for (value of willChangeValues) {
+ makeStackingElement('will-change', value.property);
+ }
+ }
+
+ window.addEventListener('load', doTest, false);
+ </script>
+</head>
+<body>
+</body>
+</html>
</ins></span></pre></div>
<a id="trunkLayoutTestsfastcsswillchangewillchangecreatesstackingcontexthtml"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context.html (190666 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context.html 2015-10-07 14:59:11 UTC (rev 190666)
+++ trunk/LayoutTests/fast/css/will-change/will-change-creates-stacking-context.html 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -45,7 +45,7 @@
</span><span class="cx"> function doTest()
</span><span class="cx"> {
</span><span class="cx"> for (value of willChangeValues) {
</span><del>- makeStackingBlock('will-change', value.property);
</del><ins>+ makeStackingElement('will-change', value.property);
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre></div>
<a id="trunkLayoutTestsplatformmacTestExpectations"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/platform/mac/TestExpectations (190666 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/platform/mac/TestExpectations 2015-10-07 14:59:11 UTC (rev 190666)
+++ trunk/LayoutTests/platform/mac/TestExpectations 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -1306,6 +1306,7 @@
</span><span class="cx"> [ Mavericks ] compositing/media-controls-bar-appearance.html [ Skip ]
</span><span class="cx"> [ Mavericks ] compositing/media-controls-bar-appearance-big.html [ Skip ]
</span><span class="cx"> [ Mavericks ] fast/css/will-change/will-change-creates-stacking-context.html [ ImageOnlyFailure ]
</span><ins>+[ Mavericks ] fast/css/will-change/will-change-creates-stacking-context-inline.html [ ImageOnlyFailure ]
</ins><span class="cx">
</span><span class="cx"> # Reftests have different expected results in Mavericks and Yosemite
</span><span class="cx"> [ Mavericks ] fast/ruby/ruby-expansion-cjk.html [ ImageOnlyFailure ]
</span></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (190666 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog 2015-10-07 14:59:11 UTC (rev 190666)
+++ trunk/Source/WebCore/ChangeLog 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -1,3 +1,30 @@
</span><ins>+2015-10-06 Simon Fraser <simon.fraser@apple.com>
+
+ will-change should trigger stacking context based purely on properties
+ https://bugs.webkit.org/show_bug.cgi?id=148068
+
+ Reviewed by Zalan Bujtas.
+
+ Previously, our will-change implementation didn't trigger stacking context
+ on an inline if the will-change property didn't apply to inlines (like 'transform').
+ However, this doesn't agree with the CSS-WG consensus (https://lists.w3.org/Archives/Public/www-style/2015Sep/0112.html).
+
+ Change behavior to have stacking context creation behavior for will-change be
+ identical for inlines and blocks.
+
+ Test: fast/css/will-change/will-change-creates-stacking-context-inline.html
+
+ * rendering/RenderInline.cpp:
+ (WebCore::inFlowPositionedInlineAncestor):
+ * rendering/RenderInline.h:
+ (WebCore::RenderInline::willChangeCreatesStackingContext):
+ * rendering/style/WillChangeData.cpp:
+ (WebCore::propertyCreatesStackingContext):
+ (WebCore::WillChangeData::addFeature):
+ (WebCore::propertyCreatesStackingContextOnBoxesOnly): Deleted.
+ * rendering/style/WillChangeData.h:
+ (WebCore::WillChangeData::canCreateStackingContextOnInline): Deleted.
+
</ins><span class="cx"> 2015-10-07 Javier Fernandez <jfernandez@igalia.com>
</span><span class="cx">
</span><span class="cx"> [CSS Grid Layout] Modify grid item height doesn't work
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingRenderInlinecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/RenderInline.cpp (190666 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/RenderInline.cpp 2015-10-07 14:59:11 UTC (rev 190666)
+++ trunk/Source/WebCore/rendering/RenderInline.cpp 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -136,7 +136,7 @@
</span><span class="cx"> return p;
</span><span class="cx"> p = p->parent();
</span><span class="cx"> }
</span><del>- return 0;
</del><ins>+ return nullptr;
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> static void updateStyleOfAnonymousBlockContinuations(const RenderBlock& block, const RenderStyle* newStyle, const RenderStyle* oldStyle)
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingRenderInlineh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/RenderInline.h (190666 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/RenderInline.h 2015-10-07 14:59:11 UTC (rev 190666)
+++ trunk/Source/WebCore/rendering/RenderInline.h 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -179,7 +179,7 @@
</span><span class="cx">
</span><span class="cx"> bool willChangeCreatesStackingContext() const
</span><span class="cx"> {
</span><del>- return style().willChange() && style().willChange()->canCreateStackingContextOnInline();
</del><ins>+ return style().willChange() && style().willChange()->canCreateStackingContext();
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> RenderLineBoxList m_lineBoxes; // All of the line boxes created for this inline flow. For example, <i>Hello<br>world.</i> will have two <i> line boxes.
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingstyleWillChangeDatacpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/style/WillChangeData.cpp (190666 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/style/WillChangeData.cpp 2015-10-07 14:59:11 UTC (rev 190666)
+++ trunk/Source/WebCore/rendering/style/WillChangeData.cpp 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -65,6 +65,10 @@
</span><span class="cx"> static bool propertyCreatesStackingContext(CSSPropertyID property)
</span><span class="cx"> {
</span><span class="cx"> switch (property) {
</span><ins>+ case CSSPropertyPerspective:
+ case CSSPropertyTransform:
+ case CSSPropertyTransformStyle:
+ case CSSPropertyWebkitTransformStyle:
</ins><span class="cx"> case CSSPropertyClipPath:
</span><span class="cx"> case CSSPropertyWebkitClipPath:
</span><span class="cx"> case CSSPropertyMask:
</span><span class="lines">@@ -86,19 +90,6 @@
</span><span class="cx"> #if ENABLE(CSS_REGIONS)
</span><span class="cx"> case CSSPropertyWebkitFlowFrom:
</span><span class="cx"> #endif
</span><del>- return true;
- default:
- return false;
- }
-}
-
-static bool propertyCreatesStackingContextOnBoxesOnly(CSSPropertyID property)
-{
- switch (property) {
- case CSSPropertyPerspective:
- case CSSPropertyTransform:
- case CSSPropertyTransformStyle:
- case CSSPropertyWebkitTransformStyle:
</del><span class="cx"> #if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
</span><span class="cx"> case CSSPropertyWebkitOverflowScrolling:
</span><span class="cx"> #endif
</span><span class="lines">@@ -142,8 +133,7 @@
</span><span class="cx"> ASSERT(feature == Property || propertyID == CSSPropertyInvalid);
</span><span class="cx"> m_animatableFeatures.append(AnimatableFeature(feature, propertyID));
</span><span class="cx">
</span><del>- m_canCreateStackingContextOnInline |= propertyCreatesStackingContext(propertyID);
- m_canCreateStackingContext |= m_canCreateStackingContextOnInline | propertyCreatesStackingContextOnBoxesOnly(propertyID);
</del><ins>+ m_canCreateStackingContext |= propertyCreatesStackingContext(propertyID);
</ins><span class="cx">
</span><span class="cx"> m_canTriggerCompositingOnInline |= propertyTriggersCompositing(propertyID);
</span><span class="cx"> m_canTriggerCompositing |= m_canTriggerCompositingOnInline | propertyTriggersCompositingOnBoxesOnly(propertyID);
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingstyleWillChangeDatah"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/style/WillChangeData.h (190666 => 190667)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/style/WillChangeData.h 2015-10-07 14:59:11 UTC (rev 190666)
+++ trunk/Source/WebCore/rendering/style/WillChangeData.h 2015-10-07 15:09:02 UTC (rev 190667)
</span><span class="lines">@@ -55,8 +55,6 @@
</span><span class="cx"> bool containsProperty(CSSPropertyID) const;
</span><span class="cx">
</span><span class="cx"> bool canCreateStackingContext() const { return m_canCreateStackingContext; }
</span><del>- bool canCreateStackingContextOnInline() const { return m_canCreateStackingContextOnInline; }
-
</del><span class="cx"> bool canTriggerCompositing() const { return m_canTriggerCompositing; }
</span><span class="cx"> bool canTriggerCompositingOnInline() const { return m_canTriggerCompositingOnInline; }
</span><span class="cx">
</span><span class="lines">@@ -124,7 +122,6 @@
</span><span class="cx">
</span><span class="cx"> Vector<AnimatableFeature, 1> m_animatableFeatures;
</span><span class="cx"> bool m_canCreateStackingContext { false };
</span><del>- bool m_canCreateStackingContextOnInline { false };
</del><span class="cx"> bool m_canTriggerCompositing { false };
</span><span class="cx"> bool m_canTriggerCompositingOnInline { false };
</span><span class="cx"> };
</span></span></pre>
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