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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/173544">173544</a></dd>
<dt>Author</dt> <dd>bdakin@apple.com</dd>
<dt>Date</dt> <dd>2014-09-11 15:18:58 -0700 (Thu, 11 Sep 2014)</dd>
</dl>

<h3>Log Message</h3>
<pre>WebKit scrollbars flash in non-dominant spaces when entering Mission Control
https://bugs.webkit.org/show_bug.cgi?id=136761
-and corresponding-
rdar://problem/18195616

Reviewed by Tim Horton.

This patch makes our logic about when to call ScrollableArea::contentAreaDidHide/
Show match the logic in AppKit. We only want these notifications when the window 
has become both visible and active (or lost both, in the case of hide).

Re-name setIsVisibleInternal() to setIsVisibleAndActiveInternal(), and call it 
only when both visibility and active-state have changed.
* page/FocusController.cpp:
(WebCore::FocusController::setViewState):
(WebCore::FocusController::setIsVisibleAndActiveInternal):
(WebCore::FocusController::setIsVisibleInternal): Deleted.
* page/FocusController.h:

FocusController::setViewState() is the only place that needs to call 
ScrollableArea::contentAreaDidHide/Show, so remove these callers.
* page/FrameView.cpp:
(WebCore::FrameView::didMoveOnscreen): Deleted.
(WebCore::FrameView::willMoveOffscreen): Deleted.
* page/FrameView.h:
* page/Page.cpp:
(WebCore::Page::setIsVisibleInternal):</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorepageFocusControllercpp">trunk/Source/WebCore/page/FocusController.cpp</a></li>
<li><a href="#trunkSourceWebCorepageFocusControllerh">trunk/Source/WebCore/page/FocusController.h</a></li>
<li><a href="#trunkSourceWebCorepageFrameViewcpp">trunk/Source/WebCore/page/FrameView.cpp</a></li>
<li><a href="#trunkSourceWebCorepageFrameViewh">trunk/Source/WebCore/page/FrameView.h</a></li>
<li><a href="#trunkSourceWebCorepagePagecpp">trunk/Source/WebCore/page/Page.cpp</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (173543 => 173544)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2014-09-11 22:14:19 UTC (rev 173543)
+++ trunk/Source/WebCore/ChangeLog        2014-09-11 22:18:58 UTC (rev 173544)
</span><span class="lines">@@ -1,3 +1,33 @@
</span><ins>+2014-09-11  Beth Dakin  &lt;bdakin@apple.com&gt;
+
+        WebKit scrollbars flash in non-dominant spaces when entering Mission Control
+        https://bugs.webkit.org/show_bug.cgi?id=136761
+        -and corresponding-
+        rdar://problem/18195616
+
+        Reviewed by Tim Horton.
+
+        This patch makes our logic about when to call ScrollableArea::contentAreaDidHide/
+        Show match the logic in AppKit. We only want these notifications when the window 
+        has become both visible and active (or lost both, in the case of hide).
+
+        Re-name setIsVisibleInternal() to setIsVisibleAndActiveInternal(), and call it 
+        only when both visibility and active-state have changed.
+        * page/FocusController.cpp:
+        (WebCore::FocusController::setViewState):
+        (WebCore::FocusController::setIsVisibleAndActiveInternal):
+        (WebCore::FocusController::setIsVisibleInternal): Deleted.
+        * page/FocusController.h:
+
+        FocusController::setViewState() is the only place that needs to call 
+        ScrollableArea::contentAreaDidHide/Show, so remove these callers.
+        * page/FrameView.cpp:
+        (WebCore::FrameView::didMoveOnscreen): Deleted.
+        (WebCore::FrameView::willMoveOffscreen): Deleted.
+        * page/FrameView.h:
+        * page/Page.cpp:
+        (WebCore::Page::setIsVisibleInternal):
+
</ins><span class="cx"> 2014-09-10  Michael Saboff  &lt;msaboff@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Move JSScope out of JSFunction into separate JSCallee class
</span></span></pre></div>
<a id="trunkSourceWebCorepageFocusControllercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/FocusController.cpp (173543 => 173544)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/FocusController.cpp        2014-09-11 22:14:19 UTC (rev 173543)
+++ trunk/Source/WebCore/page/FocusController.cpp        2014-09-11 22:18:58 UTC (rev 173544)
</span><span class="lines">@@ -645,10 +645,11 @@
</span><span class="cx"> 
</span><span class="cx">     if (changed &amp; ViewState::IsFocused)
</span><span class="cx">         setFocusedInternal(viewState &amp; ViewState::IsFocused);
</span><del>-    if (changed &amp; ViewState::WindowIsActive)
</del><ins>+    if (changed &amp; ViewState::WindowIsActive) {
</ins><span class="cx">         setActiveInternal(viewState &amp; ViewState::WindowIsActive);
</span><del>-    if (changed &amp; ViewState::IsVisible)
-        setIsVisibleInternal(viewState &amp; ViewState::IsVisible);
</del><ins>+        if (changed &amp; ViewState::IsVisible)
+            setIsVisibleAndActiveInternal(viewState &amp; ViewState::WindowIsActive);
+    }
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void FocusController::setActive(bool active)
</span><span class="lines">@@ -679,7 +680,7 @@
</span><span class="cx">         scrollableArea-&gt;contentAreaDidHide();
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-void FocusController::setIsVisibleInternal(bool contentIsVisible)
</del><ins>+void FocusController::setIsVisibleAndActiveInternal(bool contentIsVisible)
</ins><span class="cx"> {
</span><span class="cx">     FrameView* view = m_page.mainFrame().view();
</span><span class="cx">     if (!view)
</span></span></pre></div>
<a id="trunkSourceWebCorepageFocusControllerh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/FocusController.h (173543 => 173544)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/FocusController.h        2014-09-11 22:14:19 UTC (rev 173543)
+++ trunk/Source/WebCore/page/FocusController.h        2014-09-11 22:18:58 UTC (rev 173544)
</span><span class="lines">@@ -95,7 +95,7 @@
</span><span class="cx"> private:
</span><span class="cx">     void setActiveInternal(bool);
</span><span class="cx">     void setFocusedInternal(bool);
</span><del>-    void setIsVisibleInternal(bool);
</del><ins>+    void setIsVisibleAndActiveInternal(bool);
</ins><span class="cx"> 
</span><span class="cx">     bool advanceFocusDirectionally(FocusDirection, KeyboardEvent*);
</span><span class="cx">     bool advanceFocusInDocumentOrder(FocusDirection, KeyboardEvent*, bool initialFocus);
</span></span></pre></div>
<a id="trunkSourceWebCorepageFrameViewcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/FrameView.cpp (173543 => 173544)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/FrameView.cpp        2014-09-11 22:14:19 UTC (rev 173543)
+++ trunk/Source/WebCore/page/FrameView.cpp        2014-09-11 22:18:58 UTC (rev 173544)
</span><span class="lines">@@ -1061,16 +1061,6 @@
</span><span class="cx">     return !renderView || !renderView-&gt;compositor().has3DContent();
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-void FrameView::didMoveOnscreen()
-{
-    contentAreaDidShow();
-}
-
-void FrameView::willMoveOffscreen()
-{
-    contentAreaDidHide();
-}
-
</del><span class="cx"> void FrameView::setIsInWindow(bool isInWindow)
</span><span class="cx"> {
</span><span class="cx">     if (RenderView* renderView = this-&gt;renderView())
</span></span></pre></div>
<a id="trunkSourceWebCorepageFrameViewh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/FrameView.h (173543 => 173544)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/FrameView.h        2014-09-11 22:14:19 UTC (rev 173543)
+++ trunk/Source/WebCore/page/FrameView.h        2014-09-11 22:18:58 UTC (rev 173544)
</span><span class="lines">@@ -177,8 +177,6 @@
</span><span class="cx">     // a faithful representation of the content.
</span><span class="cx">     WEBCORE_EXPORT bool isSoftwareRenderable() const;
</span><span class="cx"> 
</span><del>-    void didMoveOnscreen();
-    void willMoveOffscreen();
</del><span class="cx">     void setIsInWindow(bool);
</span><span class="cx"> 
</span><span class="cx">     void resetScrollbars();
</span></span></pre></div>
<a id="trunkSourceWebCorepagePagecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/Page.cpp (173543 => 173544)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/Page.cpp        2014-09-11 22:14:19 UTC (rev 173543)
+++ trunk/Source/WebCore/page/Page.cpp        2014-09-11 22:18:58 UTC (rev 173544)
</span><span class="lines">@@ -1253,11 +1253,6 @@
</span><span class="cx">     if (isVisible) {
</span><span class="cx">         m_isPrerender = false;
</span><span class="cx"> 
</span><del>-        for (Frame* frame = &amp;mainFrame(); frame; frame = frame-&gt;tree().traverseNext()) {
-            if (FrameView* frameView = frame-&gt;view())
-                frameView-&gt;didMoveOnscreen();
-        }
-
</del><span class="cx">         resumeScriptedAnimations();
</span><span class="cx"> 
</span><span class="cx">         if (FrameView* view = mainFrame().view())
</span><span class="lines">@@ -1280,11 +1275,6 @@
</span><span class="cx">         if (m_settings-&gt;hiddenPageCSSAnimationSuspensionEnabled())
</span><span class="cx">             mainFrame().animation().suspendAnimations();
</span><span class="cx"> 
</span><del>-        for (Frame* frame = &amp;mainFrame(); frame; frame = frame-&gt;tree().traverseNext()) {
-            if (FrameView* frameView = frame-&gt;view())
-                frameView-&gt;willMoveOffscreen();
-        }
-
</del><span class="cx">         suspendScriptedAnimations();
</span><span class="cx"> 
</span><span class="cx">         if (FrameView* view = mainFrame().view())
</span></span></pre>
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