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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/243709">243709</a></dd>
<dt>Author</dt> <dd>antti@apple.com</dd>
<dt>Date</dt> <dd>2019-04-01 12:53:00 -0700 (Mon, 01 Apr 2019)</dd>
</dl>

<h3>Log Message</h3>
<pre>Update event region when toggling pointer-events:none
https://bugs.webkit.org/show_bug.cgi?id=195902
<rdar://problem/48988384>

Reviewed by Simon Fraser.

Source/WebCore:

Test: fast/scrolling/ios/event-region-pointer-events.html

Normally paint invalidation requests compositing configuration update whenever anything that would
affect event region changes. However mutating 'pointer-events' property does not cause paint invalidation.

* rendering/RenderElement.cpp:
(WebCore::RenderElement::styleWillChange):

Request compositing update explicitly from the containing layer.

* rendering/RenderLayer.cpp:
(WebCore::RenderLayer::invalidateEventRegion):
* rendering/RenderLayer.h:

LayoutTests:

* fast/scrolling/ios/event-region-pointer-events-expected.txt: Added.
* fast/scrolling/ios/event-region-pointer-events.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="#trunkSourceWebCorerenderingRenderElementcpp">trunk/Source/WebCore/rendering/RenderElement.cpp</a></li>
<li><a href="#trunkSourceWebCorerenderingRenderLayercpp">trunk/Source/WebCore/rendering/RenderLayer.cpp</a></li>
<li><a href="#trunkSourceWebCorerenderingRenderLayerh">trunk/Source/WebCore/rendering/RenderLayer.h</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsfastscrollingioseventregionpointereventsexpectedtxt">trunk/LayoutTests/fast/scrolling/ios/event-region-pointer-events-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfastscrollingioseventregionpointereventshtml">trunk/LayoutTests/fast/scrolling/ios/event-region-pointer-events.html</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (243708 => 243709)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog      2019-04-01 19:51:09 UTC (rev 243708)
+++ trunk/LayoutTests/ChangeLog 2019-04-01 19:53:00 UTC (rev 243709)
</span><span class="lines">@@ -1,3 +1,14 @@
</span><ins>+2019-04-01  Antti Koivisto  <antti@apple.com>
+
+        Update event region when toggling pointer-events:none
+        https://bugs.webkit.org/show_bug.cgi?id=195902
+        <rdar://problem/48988384>
+
+        Reviewed by Simon Fraser.
+
+        * fast/scrolling/ios/event-region-pointer-events-expected.txt: Added.
+        * fast/scrolling/ios/event-region-pointer-events.html: Added.
+
</ins><span class="cx"> 2019-04-01  Chris Dumez  <cdumez@apple.com>
</span><span class="cx"> 
</span><span class="cx">         Support "noreferrer" for window.open()
</span></span></pre></div>
<a id="trunkLayoutTestsfastscrollingioseventregionpointereventsexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/scrolling/ios/event-region-pointer-events-expected.txt (0 => 243709)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/scrolling/ios/event-region-pointer-events-expected.txt                            (rev 0)
+++ trunk/LayoutTests/fast/scrolling/ios/event-region-pointer-events-expected.txt       2019-04-01 19:53:00 UTC (rev 243709)
</span><span class="lines">@@ -0,0 +1,99 @@
</span><ins>+ 

+ Before:
+
+(GraphicsLayer
+  (anchor 0.00 0.00)
+  (bounds 800.00 600.00)
+  (children 1
+    (GraphicsLayer
+      (bounds 800.00 600.00)
+      (contentsOpaque 1)
+      (children 3
+        (GraphicsLayer
+          (position 8.00 8.00)
+          (bounds 200.00 200.00)
+          (drawsContent 1)
+        )
+        (GraphicsLayer
+          (position 212.00 8.00)
+          (bounds 202.00 202.00)
+          (drawsContent 1)
+        )
+        (GraphicsLayer
+          (position 416.00 8.00)
+          (bounds 202.00 202.00)
+          (drawsContent 1)
+        )
+      )
+    )
+  )
+)
+After setting 'pointer-events:auto':
+
+(GraphicsLayer
+  (anchor 0.00 0.00)
+  (bounds 800.00 673.00)
+  (children 1
+    (GraphicsLayer
+      (bounds 800.00 673.00)
+      (contentsOpaque 1)
+      (children 3
+        (GraphicsLayer
+          (position 8.00 8.00)
+          (bounds 200.00 200.00)
+          (drawsContent 1)
+          (event region
+            (rect (0,0) width=200 height=200)
+          )
+        )
+        (GraphicsLayer
+          (position 212.00 8.00)
+          (bounds 202.00 202.00)
+          (drawsContent 1)
+          (event region
+            (rect (2,2) width=200 height=200)
+          )
+        )
+        (GraphicsLayer
+          (position 416.00 8.00)
+          (bounds 202.00 202.00)
+          (drawsContent 1)
+          (event region
+            (rect (2,2) width=200 height=200)
+          )
+        )
+      )
+    )
+  )
+)
+After setting 'pointer-events:none':
+
+(GraphicsLayer
+  (anchor 0.00 0.00)
+  (bounds 800.00 1205.00)
+  (children 1
+    (GraphicsLayer
+      (bounds 800.00 1205.00)
+      (contentsOpaque 1)
+      (children 3
+        (GraphicsLayer
+          (position 8.00 8.00)
+          (bounds 200.00 200.00)
+          (drawsContent 1)
+        )
+        (GraphicsLayer
+          (position 212.00 8.00)
+          (bounds 202.00 202.00)
+          (drawsContent 1)
+        )
+        (GraphicsLayer
+          (position 416.00 8.00)
+          (bounds 202.00 202.00)
+          (drawsContent 1)
+        )
+      )
+    )
+  )
+)
+
</ins></span></pre></div>
<a id="trunkLayoutTestsfastscrollingioseventregionpointereventshtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/scrolling/ios/event-region-pointer-events.html (0 => 243709)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/scrolling/ios/event-region-pointer-events.html                            (rev 0)
+++ trunk/LayoutTests/fast/scrolling/ios/event-region-pointer-events.html       2019-04-01 19:53:00 UTC (rev 243709)
</span><span class="lines">@@ -0,0 +1,58 @@
</span><ins>+<html>
+<style>
+.testdiv {
+    display: inline-block;
+    box-sizing: border-box;
+    border: 2px solid blue;
+    position: relative;
+    height: 200px;
+    width: 200px;
+    will-change: transform;
+}
+.inner {
+    height: 200px;
+    width: 200px;
+    background-color: green;
+}
+
+</style>
+<script>
+window.onload = function () {
+    if (!window.internals)
+        return;
+    if (window.testRunner)
+        testRunner.dumpAsText();
+
+    results.innerText = "Before:\n\n"
+    results.innerText += internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_EVENT_REGION);
+
+    test1.style.pointerEvents = "auto";
+    test2.style.pointerEvents = "auto";
+    test3.style.pointerEvents = "auto";
+
+    results.innerText += "After setting 'pointer-events:auto':\n\n"
+    results.innerText += internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_EVENT_REGION);
+
+    test1.style.pointerEvents = "none";
+    test2.style.pointerEvents = "none";
+    test3.style.pointerEvents = "none";
+
+    results.innerText += "After setting 'pointer-events:none':\n\n"
+    results.innerText += internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_EVENT_REGION);
+}
+</script>
+<body>
+<div class="testdiv" id="test1" style="pointer-events:none">
+</div>
+<div class="testdiv" style="pointer-events:none">
+    <div id="test2" class="inner"></div>
+</div>
+<div class="testdiv" style="pointer-events:none">
+    <div class="inner" style="position:relative">
+        <div id="test3" class="inner"></div>
+    </div>
+</div>
+
+<pre id="results"></pre>
+</body>
+</html>
</ins></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (243708 => 243709)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog   2019-04-01 19:51:09 UTC (rev 243708)
+++ trunk/Source/WebCore/ChangeLog      2019-04-01 19:53:00 UTC (rev 243709)
</span><span class="lines">@@ -1,3 +1,25 @@
</span><ins>+2019-04-01  Antti Koivisto  <antti@apple.com>
+
+        Update event region when toggling pointer-events:none
+        https://bugs.webkit.org/show_bug.cgi?id=195902
+        <rdar://problem/48988384>
+
+        Reviewed by Simon Fraser.
+
+        Test: fast/scrolling/ios/event-region-pointer-events.html
+
+        Normally paint invalidation requests compositing configuration update whenever anything that would
+        affect event region changes. However mutating 'pointer-events' property does not cause paint invalidation.
+
+        * rendering/RenderElement.cpp:
+        (WebCore::RenderElement::styleWillChange):
+
+        Request compositing update explicitly from the containing layer.
+
+        * rendering/RenderLayer.cpp:
+        (WebCore::RenderLayer::invalidateEventRegion):
+        * rendering/RenderLayer.h:
+
</ins><span class="cx"> 2019-04-01  Chris Dumez  <cdumez@apple.com>
</span><span class="cx"> 
</span><span class="cx">         Support "noreferrer" for window.open()
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingRenderElementcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/RenderElement.cpp (243708 => 243709)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/RenderElement.cpp 2019-04-01 19:51:09 UTC (rev 243708)
+++ trunk/Source/WebCore/rendering/RenderElement.cpp    2019-04-01 19:53:00 UTC (rev 243709)
</span><span class="lines">@@ -730,6 +730,12 @@
</span><span class="cx">             }
</span><span class="cx">         }
</span><span class="cx"> 
</span><ins>+        if (m_style.pointerEvents() != newStyle.pointerEvents()) {
+            // Usually the event region gets updated as a result of paint invalidation. Here we need to request an update explicitly.
+            if (auto* layer = enclosingLayer())
+                layer->invalidateEventRegion();
+        }
+
</ins><span class="cx">         if (m_parent && (newStyle.outlineSize() < m_style.outlineSize() || shouldRepaintForStyleDifference(diff)))
</span><span class="cx">             repaint();
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingRenderLayercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/RenderLayer.cpp (243708 => 243709)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/RenderLayer.cpp   2019-04-01 19:51:09 UTC (rev 243708)
+++ trunk/Source/WebCore/rendering/RenderLayer.cpp      2019-04-01 19:53:00 UTC (rev 243709)
</span><span class="lines">@@ -6662,6 +6662,12 @@
</span><span class="cx">     return false;
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+void RenderLayer::invalidateEventRegion()
+{
+    if (auto* compositingLayer = enclosingCompositingLayerForRepaint())
+        compositingLayer->setNeedsCompositingConfigurationUpdate();
+}
+
</ins><span class="cx"> TextStream& operator<<(TextStream& ts, const RenderLayer& layer)
</span><span class="cx"> {
</span><span class="cx">     ts << "RenderLayer " << &layer << " " << layer.size();
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingRenderLayerh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/RenderLayer.h (243708 => 243709)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/RenderLayer.h     2019-04-01 19:51:09 UTC (rev 243708)
+++ trunk/Source/WebCore/rendering/RenderLayer.h        2019-04-01 19:53:00 UTC (rev 243709)
</span><span class="lines">@@ -865,6 +865,8 @@
</span><span class="cx"> 
</span><span class="cx">     WEBCORE_EXPORT bool isTransparentOrFullyClippedRespectingParentFrames() const;
</span><span class="cx"> 
</span><ins>+    void invalidateEventRegion();
+
</ins><span class="cx"> private:
</span><span class="cx"> 
</span><span class="cx">     void setNextSibling(RenderLayer* next) { m_next = next; }
</span></span></pre>
</div>
</div>

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