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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/182822">182822</a></dd>
<dt>Author</dt> <dd>timothy_horton@apple.com</dd>
<dt>Date</dt> <dd>2015-04-14 17:02:53 -0700 (Tue, 14 Apr 2015)</dd>
</dl>

<h3>Log Message</h3>
<pre>Update gesture swipe shadow style
https://bugs.webkit.org/show_bug.cgi?id=143616
&lt;rdar://problem/19295843&gt;

Reviewed by Darin Adler.

* UIProcess/mac/ViewGestureController.h:
* UIProcess/mac/ViewGestureControllerMac.mm:
(WebKit::ViewGestureController::beginSwipeGesture):
For the modern shadow style, use a layer stretched along the edge of the swiping content
with the newly added PNGs as the layer contents.

Add a dimming layer over the lower layer of content which fades in/out
during the swipe.

(WebKit::ViewGestureController::handleSwipeGesture):
Fade the dimming layer in and out during the entire swipe.
Fade the shadow layer out during the last few pixels of the swipe.

(WebKit::ViewGestureController::removeSwipeSnapshot):
Unparent the new layers.

* WebKit2.xcodeproj/project.pbxproj:
* Resources/SwipeShadow.png:
* Resources/SwipeShadow@2x.png:
Add the new resources.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebKit2ChangeLog">trunk/Source/WebKit2/ChangeLog</a></li>
<li><a href="#trunkSourceWebKit2UIProcessmacViewGestureControllerh">trunk/Source/WebKit2/UIProcess/mac/ViewGestureController.h</a></li>
<li><a href="#trunkSourceWebKit2UIProcessmacViewGestureControllerMacmm">trunk/Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm</a></li>
<li><a href="#trunkSourceWebKit2WebKit2xcodeprojprojectpbxproj">trunk/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunkSourceWebKit2ResourcesSwipeShadowpng">trunk/Source/WebKit2/Resources/SwipeShadow.png</a></li>
<li><a href="#trunkSourceWebKit2ResourcesSwipeShadow2xpng">trunk/Source/WebKit2/Resources/SwipeShadow@2x.png</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebKit2ChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/ChangeLog (182821 => 182822)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/ChangeLog        2015-04-14 23:48:00 UTC (rev 182821)
+++ trunk/Source/WebKit2/ChangeLog        2015-04-15 00:02:53 UTC (rev 182822)
</span><span class="lines">@@ -1,3 +1,32 @@
</span><ins>+2015-04-14  Tim Horton  &lt;timothy_horton@apple.com&gt;
+
+        Update gesture swipe shadow style
+        https://bugs.webkit.org/show_bug.cgi?id=143616
+        &lt;rdar://problem/19295843&gt;
+
+        Reviewed by Darin Adler.
+
+        * UIProcess/mac/ViewGestureController.h:
+        * UIProcess/mac/ViewGestureControllerMac.mm:
+        (WebKit::ViewGestureController::beginSwipeGesture):
+        For the modern shadow style, use a layer stretched along the edge of the swiping content
+        with the newly added PNGs as the layer contents.
+
+        Add a dimming layer over the lower layer of content which fades in/out
+        during the swipe.
+
+        (WebKit::ViewGestureController::handleSwipeGesture):
+        Fade the dimming layer in and out during the entire swipe.
+        Fade the shadow layer out during the last few pixels of the swipe.
+
+        (WebKit::ViewGestureController::removeSwipeSnapshot):
+        Unparent the new layers.
+
+        * WebKit2.xcodeproj/project.pbxproj:
+        * Resources/SwipeShadow.png:
+        * Resources/SwipeShadow@2x.png:
+        Add the new resources.
+
</ins><span class="cx"> 2015-04-14  Brian Weinstein  &lt;bweinstein@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Add SPI to clear HSTS hosts added since a date.
</span></span></pre></div>
<a id="trunkSourceWebKit2ResourcesSwipeShadowpng"></a>
<div class="binary"><h4>Added: trunk/Source/WebKit2/Resources/SwipeShadow.png</h4>
<pre class="diff"><span>
<span class="cx">(Binary files differ)
</span></span></pre></div>
<span class="cx">Property changes on: trunk/Source/WebKit2/Resources/SwipeShadow.png
</span><span class="cx">___________________________________________________________________
</span><a id="svnmimetype"></a>
<div class="addfile"><h4>Added: svn:mime-type</h4></div>
<a id="trunkSourceWebKit2ResourcesSwipeShadow2xpng"></a>
<div class="binary"><h4>Added: trunk/Source/WebKit2/Resources/SwipeShadow@2x.png</h4>
<pre class="diff"><span>
<span class="cx">(Binary files differ)
</span></span></pre></div>
<span class="cx">Property changes on: trunk/Source/WebKit2/Resources/SwipeShadow@2x.png
</span><span class="cx">___________________________________________________________________
</span><a id="svnmimetype"></a>
<div class="addfile"><h4>Added: svn:mime-type</h4></div>
<a id="trunkSourceWebKit2UIProcessmacViewGestureControllerh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/UIProcess/mac/ViewGestureController.h (182821 => 182822)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/UIProcess/mac/ViewGestureController.h        2015-04-14 23:48:00 UTC (rev 182821)
+++ trunk/Source/WebKit2/UIProcess/mac/ViewGestureController.h        2015-04-15 00:02:53 UTC (rev 182822)
</span><span class="lines">@@ -186,6 +186,8 @@
</span><span class="cx">     RetainPtr&lt;WKSwipeCancellationTracker&gt; m_swipeCancellationTracker;
</span><span class="cx">     RetainPtr&lt;CALayer&gt; m_swipeLayer;
</span><span class="cx">     RetainPtr&lt;CALayer&gt; m_swipeSnapshotLayer;
</span><ins>+    RetainPtr&lt;CALayer&gt; m_swipeShadowLayer;
+    RetainPtr&lt;CALayer&gt; m_swipeDimmingLayer;
</ins><span class="cx">     Vector&lt;RetainPtr&lt;CALayer&gt;&gt; m_currentSwipeLiveLayers;
</span><span class="cx"> 
</span><span class="cx">     SwipeTransitionStyle m_swipeTransitionStyle { SwipeTransitionStyle::Overlap };
</span></span></pre></div>
<a id="trunkSourceWebKit2UIProcessmacViewGestureControllerMacmm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm (182821 => 182822)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm        2015-04-14 23:48:00 UTC (rev 182821)
+++ trunk/Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm        2015-04-15 00:02:53 UTC (rev 182822)
</span><span class="lines">@@ -46,6 +46,12 @@
</span><span class="cx"> 
</span><span class="cx"> using namespace WebCore;
</span><span class="cx"> 
</span><ins>+#if PLATFORM(MAC) &amp;&amp; __MAC_OS_X_VERSION_MIN_REQUIRED &lt; 101000
+#define ENABLE_LEGACY_SWIPE_SHADOW_STYLE 1
+#else
+#define ENABLE_LEGACY_SWIPE_SHADOW_STYLE 0
+#endif
+
</ins><span class="cx"> static const double minMagnification = 1;
</span><span class="cx"> static const double maxMagnification = 3;
</span><span class="cx"> 
</span><span class="lines">@@ -58,8 +64,13 @@
</span><span class="cx"> static const float smartMagnificationElementPadding = 0.05;
</span><span class="cx"> static const float smartMagnificationPanScrollThreshold = 100;
</span><span class="cx"> 
</span><ins>+#if ENABLE(LEGACY_SWIPE_SHADOW_STYLE)
</ins><span class="cx"> static const double swipeOverlayShadowOpacity = 0.66;
</span><span class="cx"> static const double swipeOverlayShadowRadius = 3;
</span><ins>+#else
+static const double swipeOverlayShadowOpacity = 0.47;
+static const double swipeOverlayDimmingOpacity = 0.12;
+#endif
</ins><span class="cx"> 
</span><span class="cx"> static const CGFloat minimumHorizontalSwipeDistance = 15;
</span><span class="cx"> static const float minimumScrollEventRatioForSwipe = 0.5;
</span><span class="lines">@@ -564,8 +575,9 @@
</span><span class="cx">     [m_swipeLayer setGeometryFlipped:geometryIsFlippedToRoot];
</span><span class="cx">     [m_swipeLayer setDelegate:[WebActionDisablingCALayerDelegate shared]];
</span><span class="cx"> 
</span><ins>+    float deviceScaleFactor = m_webPageProxy.deviceScaleFactor();
</ins><span class="cx">     [m_swipeSnapshotLayer setContentsGravity:kCAGravityTopLeft];
</span><del>-    [m_swipeSnapshotLayer setContentsScale:m_webPageProxy.deviceScaleFactor()];
</del><ins>+    [m_swipeSnapshotLayer setContentsScale:deviceScaleFactor];
</ins><span class="cx">     [m_swipeSnapshotLayer setAnchorPoint:CGPointZero];
</span><span class="cx">     [m_swipeSnapshotLayer setFrame:CGRectMake(0, 0, swipeArea.width(), swipeArea.height() - topContentInset)];
</span><span class="cx">     [m_swipeSnapshotLayer setName:@&quot;Gesture Swipe Snapshot Layer&quot;];
</span><span class="lines">@@ -576,8 +588,16 @@
</span><span class="cx">     if (m_webPageProxy.preferences().viewGestureDebuggingEnabled())
</span><span class="cx">         applyDebuggingPropertiesToSwipeViews();
</span><span class="cx"> 
</span><ins>+
+    CALayer *layerAdjacentToSnapshot = determineLayerAdjacentToSnapshotForParent(direction, snapshotLayerParent);
+    if (direction == SwipeDirection::Back)
+        [snapshotLayerParent insertSublayer:m_swipeLayer.get() below:layerAdjacentToSnapshot];
+    else
+        [snapshotLayerParent insertSublayer:m_swipeLayer.get() above:layerAdjacentToSnapshot];
+
</ins><span class="cx">     // We don't know enough about the custom views' hierarchy to apply a shadow.
</span><span class="cx">     if (m_swipeTransitionStyle == SwipeTransitionStyle::Overlap &amp;&amp; m_customSwipeViews.isEmpty()) {
</span><ins>+#if ENABLE(LEGACY_SWIPE_SHADOW_STYLE)
</ins><span class="cx">         if (direction == SwipeDirection::Back) {
</span><span class="cx">             float topContentInset = m_webPageProxy.topContentInset();
</span><span class="cx">             FloatRect shadowRect(FloatPoint(0, topContentInset), m_webPageProxy.viewSize() - FloatSize(0, topContentInset));
</span><span class="lines">@@ -593,13 +613,37 @@
</span><span class="cx">             [m_swipeLayer setShadowRadius:swipeOverlayShadowRadius];
</span><span class="cx">             [m_swipeLayer setShadowPath:shadowPath.get()];
</span><span class="cx">         }
</span><ins>+#else
+        FloatRect dimmingRect(FloatPoint(), m_webPageProxy.viewSize());
+        m_swipeDimmingLayer = adoptNS([[CALayer alloc] init]);
+        [m_swipeDimmingLayer setName:@&quot;Gesture Swipe Dimming Layer&quot;];
+        [m_swipeDimmingLayer setBackgroundColor:[NSColor blackColor].CGColor];
+        [m_swipeDimmingLayer setOpacity:swipeOverlayDimmingOpacity];
+        [m_swipeDimmingLayer setAnchorPoint:CGPointZero];
+        [m_swipeDimmingLayer setFrame:dimmingRect];
+        [m_swipeDimmingLayer setGeometryFlipped:geometryIsFlippedToRoot];
+        [m_swipeDimmingLayer setDelegate:[WebActionDisablingCALayerDelegate shared]];
+
+        NSImage *shadowImage = [[NSBundle bundleForClass:[WKSwipeCancellationTracker class]] imageForResource:@&quot;SwipeShadow&quot;];
+        FloatRect shadowRect(-shadowImage.size.width, topContentInset, shadowImage.size.width, m_webPageProxy.viewSize().height() - topContentInset);
+        m_swipeShadowLayer = adoptNS([[CALayer alloc] init]);
+        [m_swipeShadowLayer setName:@&quot;Gesture Swipe Shadow Layer&quot;];
+        [m_swipeShadowLayer setBackgroundColor:[NSColor colorWithPatternImage:shadowImage].CGColor];
+        [m_swipeShadowLayer setContentsScale:deviceScaleFactor];
+        [m_swipeShadowLayer setOpacity:swipeOverlayShadowOpacity];
+        [m_swipeShadowLayer setAnchorPoint:CGPointZero];
+        [m_swipeShadowLayer setFrame:shadowRect];
+        [m_swipeShadowLayer setGeometryFlipped:geometryIsFlippedToRoot];
+        [m_swipeShadowLayer setDelegate:[WebActionDisablingCALayerDelegate shared]];
+
+        if (direction == SwipeDirection::Back)
+            [snapshotLayerParent insertSublayer:m_swipeDimmingLayer.get() above:m_swipeLayer.get()];
+        else
+            [snapshotLayerParent insertSublayer:m_swipeDimmingLayer.get() below:m_swipeLayer.get()];
+
+        [snapshotLayerParent insertSublayer:m_swipeShadowLayer.get() above:m_swipeLayer.get()];
+#endif
</ins><span class="cx">     }
</span><del>-
-    CALayer *layerAdjacentToSnapshot = determineLayerAdjacentToSnapshotForParent(direction, snapshotLayerParent);
-    if (direction == SwipeDirection::Back)
-        [snapshotLayerParent insertSublayer:m_swipeLayer.get() below:layerAdjacentToSnapshot];
-    else
-        [snapshotLayerParent insertSublayer:m_swipeLayer.get() above:layerAdjacentToSnapshot];
</del><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void ViewGestureController::handleSwipeGesture(WebBackForwardListItem* targetItem, double progress, SwipeDirection direction)
</span><span class="lines">@@ -617,6 +661,23 @@
</span><span class="cx"> 
</span><span class="cx">     double swipingLayerOffset = floor(width * progress);
</span><span class="cx"> 
</span><ins>+#if !ENABLE(LEGACY_SWIPE_SHADOW_STYLE)
+    double dimmingProgress = (direction == SwipeDirection::Back) ? 1 - progress : -progress;
+    dimmingProgress = std::min(1., std::max(dimmingProgress, 0.));
+    [m_swipeDimmingLayer setOpacity:dimmingProgress * swipeOverlayDimmingOpacity];
+
+    double absoluteProgress = fabs(progress);
+    double remainingSwipeDistance = width - fabs(absoluteProgress * width);
+    double shadowFadeDistance = [m_swipeShadowLayer bounds].size.width;
+    if (remainingSwipeDistance &lt; shadowFadeDistance)
+        [m_swipeShadowLayer setOpacity:(remainingSwipeDistance / shadowFadeDistance) * swipeOverlayShadowOpacity];
+    else
+        [m_swipeShadowLayer setOpacity:swipeOverlayShadowOpacity];
+
+    if (m_swipeTransitionStyle == SwipeTransitionStyle::Overlap)
+        [m_swipeShadowLayer setTransform:CATransform3DMakeTranslation((direction == SwipeDirection::Back ? 0 : width) + swipingLayerOffset, 0, 0)];
+#endif
+
</ins><span class="cx">     if (m_swipeTransitionStyle == SwipeTransitionStyle::Overlap) {
</span><span class="cx">         if (direction == SwipeDirection::Forward) {
</span><span class="cx">             [m_swipeLayer setTransform:CATransform3DMakeTranslation(width + swipingLayerOffset, 0, 0)];
</span><span class="lines">@@ -790,6 +851,14 @@
</span><span class="cx">     [m_swipeLayer removeFromSuperlayer];
</span><span class="cx">     m_swipeLayer = nullptr;
</span><span class="cx"> 
</span><ins>+#if !ENABLE(LEGACY_SWIPE_SHADOW_STYLE)
+    [m_swipeShadowLayer removeFromSuperlayer];
+    m_swipeShadowLayer = nullptr;
+
+    [m_swipeDimmingLayer removeFromSuperlayer];
+    m_swipeDimmingLayer = nullptr;
+#endif
+
</ins><span class="cx">     m_currentSwipeLiveLayers.clear();
</span><span class="cx"> 
</span><span class="cx">     m_activeGestureType = ViewGestureType::None;
</span></span></pre></div>
<a id="trunkSourceWebKit2WebKit2xcodeprojprojectpbxproj"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj (182821 => 182822)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj        2015-04-14 23:48:00 UTC (rev 182821)
+++ trunk/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj        2015-04-15 00:02:53 UTC (rev 182822)
</span><span class="lines">@@ -667,6 +667,8 @@
</span><span class="cx">                 2DACE64E18ADBFF000E4CA76 /* _WKThumbnailViewInternal.h in Headers */ = {isa = PBXBuildFile; fileRef = 2DACE64D18ADBFF000E4CA76 /* _WKThumbnailViewInternal.h */; };
</span><span class="cx">                 2DAF06D618BD1A470081CEB1 /* SmartMagnificationController.h in Headers */ = {isa = PBXBuildFile; fileRef = 2DAF06D418BD1A470081CEB1 /* SmartMagnificationController.h */; };
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</span><ins>+                2DC658351AD7237600D44508 /* SwipeShadow.png in Resources */ = {isa = PBXBuildFile; fileRef = 2DC658331AD7237600D44508 /* SwipeShadow.png */; };
+                2DC658361AD7237600D44508 /* SwipeShadow@2x.png in Resources */ = {isa = PBXBuildFile; fileRef = 2DC658341AD7237600D44508 /* SwipeShadow@2x.png */; };
</ins><span class="cx">                 2DC6D9C318C44A610043BAD4 /* WKWebViewContentProviderRegistry.h in Headers */ = {isa = PBXBuildFile; fileRef = 2DC6D9C118C44A610043BAD4 /* WKWebViewContentProviderRegistry.h */; };
</span><span class="cx">                 2DC6D9C418C44A610043BAD4 /* WKWebViewContentProviderRegistry.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2DC6D9C218C44A610043BAD4 /* WKWebViewContentProviderRegistry.mm */; };
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</span><span class="lines">@@ -2837,6 +2839,8 @@
</span><span class="cx">                 2DAF06D418BD1A470081CEB1 /* SmartMagnificationController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = SmartMagnificationController.h; path = ios/SmartMagnificationController.h; sourceTree = &quot;&lt;group&gt;&quot;; };
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</span><span class="lines">@@ -4322,6 +4326,8 @@
</span><span class="cx">                                 1C8AE75F1992F62F00ABF6EC /* DockBottomLegacy.pdf */,
</span><span class="cx">                                 1CB75C931701E880009F809F /* DockRight.pdf */,
</span><span class="cx">                                 1C8AE7601992F62F00ABF6EC /* DockRightLegacy.pdf */,
</span><ins>+                                2DC658331AD7237600D44508 /* SwipeShadow.png */,
+                                2DC658341AD7237600D44508 /* SwipeShadow@2x.png */,
</ins><span class="cx">                                 8DC2EF5A0486A6940098B216 /* Info.plist */,
</span><span class="cx">                                 089C1666FE841158C02AAC07 /* InfoPlist.strings */,
</span><span class="cx">                                 E1D26A4C1759634E0095BFD1 /* WebContentProcess.xib */,
</span><span class="lines">@@ -8935,7 +8941,9 @@
</span><span class="cx">                                 1C8AE7611992F63A00ABF6EC /* DockBottomLegacy.pdf in Resources */,
</span><span class="cx">                                 1CB75C941701E880009F809F /* DockRight.pdf in Resources */,
</span><span class="cx">                                 1C8AE7621992F63C00ABF6EC /* DockRightLegacy.pdf in Resources */,
</span><ins>+                                2DC658361AD7237600D44508 /* SwipeShadow@2x.png in Resources */,
</ins><span class="cx">                                 8DC2EF530486A6940098B216 /* InfoPlist.strings in Resources */,
</span><ins>+                                2DC658351AD7237600D44508 /* SwipeShadow.png in Resources */,
</ins><span class="cx">                         );
</span><span class="cx">                         runOnlyForDeploymentPostprocessing = 0;
</span><span class="cx">                 };
</span></span></pre>
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