Title: [207602] branches/safari-602-branch

Diff

Modified: branches/safari-602-branch/Source/WebKit2/ChangeLog (207601 => 207602)


--- branches/safari-602-branch/Source/WebKit2/ChangeLog	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Source/WebKit2/ChangeLog	2016-10-20 09:59:48 UTC (rev 207602)
@@ -1,5 +1,62 @@
 2016-10-20  Matthew Hanson  <matthew_han...@apple.com>
 
+        Merge r206829. rdar://problem/28634858
+
+    2016-10-05  Tim Horton  <timothy_hor...@apple.com>
+
+            Make it possible to test ViewSnapshotStore behaviors
+            https://bugs.webkit.org/show_bug.cgi?id=162983
+
+            Reviewed by Simon Fraser.
+
+            Add two pieces of SPI to make it easier to test ViewSnapshotStore:
+
+            - [WKWebView _disableBackForwardSnapshotVolatilityForTesting]
+                This makes it so that we don't make snapshots volatile after we
+                take them, so that they won't get purged while the test is running
+                and cause the test to be flaky.
+
+            - [WKBackForwardListItem _copySnapshotForTesting]
+                This returns a CGImage with the content of the given back-forward
+                item's current snapshot, if there is one.
+
+            * UIProcess/API/Cocoa/WKBackForwardListItem.mm:
+            (-[WKBackForwardListItem _copySnapshotForTesting]):
+            * UIProcess/API/Cocoa/WKBackForwardListItemInternal.h:
+            * UIProcess/API/Cocoa/WKBackForwardListItemPrivate.h: Added.
+            Add WKBackForwardListItem SPI to retrieve the snapshot for a given back-forward list item.
+
+            * UIProcess/API/Cocoa/WKWebViewPrivate.h:
+            * UIProcess/API/Cocoa/WKWebView.mm:
+            (-[WKWebView _disableBackForwardSnapshotVolatilityForTesting]):
+            Add WKWebView SPI to disable volatility of snapshots, for testing purposes.
+
+            * UIProcess/Cocoa/WebViewImpl.h:
+            * UIProcess/Cocoa/WebViewImpl.mm:
+            (WebKit::WebViewImpl::takeViewSnapshot):
+            Adopt ViewSnapshot::setVolatile instead of reaching into the surface.
+
+            * UIProcess/mac/ViewGestureControllerMac.mm:
+            (WebKit::ViewGestureController::removeSwipeSnapshot):
+            Adopt ViewSnapshot::setVolatile instead of reaching into the surface.
+
+            * UIProcess/mac/ViewSnapshotStore.h:
+            (WebKit::ViewSnapshotStore::setDisableSnapshotVolatilityForTesting):
+            (WebKit::ViewSnapshotStore::disableSnapshotVolatilityForTesting):
+            * UIProcess/mac/ViewSnapshotStore.mm:
+            (WebKit::ViewSnapshotStore::ViewSnapshotStore):
+            (WebKit::ViewSnapshot::setVolatile):
+            (WebKit::ViewSnapshot::asLayerContents):
+            Move all touching of snapshot volatility into the new setVolatile,
+            and short-circuit if the testing-only m_disableSnapshotVolatility bit is set
+
+            (WebKit::ViewSnapshot::asImageForTesting):
+            Make a CGImageRef for the aforementioned WKBackForwardListItem SPI.
+            This is currently not implemented for the iOS Simulator, because we
+            don't have access to the bits of the image in that case.
+
+2016-10-20  Matthew Hanson  <matthew_han...@apple.com>
+
         Merge r206247. rdar://problem/28216256
 
     2016-09-21  Dan Bernstein  <m...@apple.com>

Modified: branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKBackForwardListItem.mm (207601 => 207602)


--- branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKBackForwardListItem.mm	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKBackForwardListItem.mm	2016-10-20 09:59:48 UTC (rev 207602)
@@ -66,6 +66,13 @@
     return *_item;
 }
 
+- (CGImageRef)_copySnapshotForTesting
+{
+    if (auto snapshot = _item->snapshot())
+        return snapshot->asImageForTesting().leakRef();
+    return nullptr;
+}
+
 #pragma mark WKObject protocol implementation
 
 - (API::Object&)_apiObject

Modified: branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKBackForwardListItemInternal.h (207601 => 207602)


--- branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKBackForwardListItemInternal.h	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKBackForwardListItemInternal.h	2016-10-20 09:59:48 UTC (rev 207602)
@@ -23,7 +23,7 @@
  * THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#import "WKBackForwardListItem.h"
+#import "WKBackForwardListItemPrivate.h"
 
 #if WK_API_ENABLED
 

Copied: branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKBackForwardListItemPrivate.h (from rev 207601, branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKBackForwardListItemInternal.h) (0 => 207602)


--- branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKBackForwardListItemPrivate.h	                        (rev 0)
+++ branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKBackForwardListItemPrivate.h	2016-10-20 09:59:48 UTC (rev 207602)
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import <WebKit/WKBackForwardListItem.h>
+
+#if WK_API_ENABLED
+
+@interface WKBackForwardListItem (WKPrivate)
+
+// For testing only.
+- (CGImageRef)_copySnapshotForTesting WK_API_AVAILABLE(macosx(WK_MAC_TBA), ios(WK_IOS_TBA));
+
+@end
+
+#endif

Modified: branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKWebView.mm (207601 => 207602)


--- branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKWebView.mm	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKWebView.mm	2016-10-20 09:59:48 UTC (rev 207602)
@@ -4607,6 +4607,11 @@
     });
 }
 
+- (void)_disableBackForwardSnapshotVolatilityForTesting
+{
+    WebKit::ViewSnapshotStore::singleton().setDisableSnapshotVolatilityForTesting(true);
+}
+
 @end
 
 

Modified: branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKWebViewPrivate.h (207601 => 207602)


--- branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKWebViewPrivate.h	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Source/WebKit2/UIProcess/API/Cocoa/WKWebViewPrivate.h	2016-10-20 09:59:48 UTC (rev 207602)
@@ -281,6 +281,8 @@
 
 - (void)_doAfterNextPresentationUpdate:(void (^)(void))updateBlock WK_API_AVAILABLE(macosx(WK_MAC_TBA), ios(WK_IOS_TBA));
 
+- (void)_disableBackForwardSnapshotVolatilityForTesting WK_API_AVAILABLE(macosx(WK_MAC_TBA), ios(WK_IOS_TBA));
+
 @end
 
 

Modified: branches/safari-602-branch/Source/WebKit2/UIProcess/Cocoa/WebViewImpl.mm (207601 => 207602)


--- branches/safari-602-branch/Source/WebKit2/UIProcess/Cocoa/WebViewImpl.mm	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Source/WebKit2/UIProcess/Cocoa/WebViewImpl.mm	2016-10-20 09:59:48 UTC (rev 207602)
@@ -3168,9 +3168,11 @@
     auto surface = WebCore::IOSurface::createFromImage(croppedSnapshotImage.get());
     if (!surface)
         return nullptr;
-    surface->setIsVolatile(true);
 
-    return ViewSnapshot::create(WTFMove(surface));
+    RefPtr<ViewSnapshot> snapshot = ViewSnapshot::create(WTFMove(surface));
+    snapshot->setVolatile(true);
+
+    return snapshot;
 }
 
 void WebViewImpl::saveBackForwardSnapshotForCurrentItem()

Modified: branches/safari-602-branch/Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm (207601 => 207602)


--- branches/safari-602-branch/Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm	2016-10-20 09:59:48 UTC (rev 207602)
@@ -814,8 +814,8 @@
     if (m_activeGestureType != ViewGestureType::Swipe)
         return;
 
-    if (m_currentSwipeSnapshot && m_currentSwipeSnapshot->surface())
-        m_currentSwipeSnapshot->surface()->setIsVolatile(true);
+    if (m_currentSwipeSnapshot)
+        m_currentSwipeSnapshot->setVolatile(true);
     m_currentSwipeSnapshot = nullptr;
 
     for (const auto& layer : m_currentSwipeLiveLayers)

Modified: branches/safari-602-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.h (207601 => 207602)


--- branches/safari-602-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.h	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.h	2016-10-20 09:59:48 UTC (rev 207602)
@@ -64,6 +64,7 @@
     void clearImage();
     bool hasImage() const;
     id asLayerContents();
+    RetainPtr<CGImageRef> asImageForTesting();
 
     void setRenderTreeSize(uint64_t renderTreeSize) { m_renderTreeSize = renderTreeSize; }
     uint64_t renderTreeSize() const { return m_renderTreeSize; }
@@ -81,6 +82,8 @@
     WebCore::IntSize size() const { return m_surface ? m_surface->size() : WebCore::IntSize(); }
 
     void setSurface(std::unique_ptr<WebCore::IOSurface>);
+
+    WebCore::IOSurface::SurfaceState setVolatile(bool);
 #else
     WebCore::IntSize size() const { return m_size; }
     size_t imageSizeInBytes() const { return m_imageSizeInBytes; }
@@ -117,6 +120,9 @@
 
     void discardSnapshotImages();
 
+    void setDisableSnapshotVolatilityForTesting(bool disable) { m_disableSnapshotVolatility = disable; }
+    bool disableSnapshotVolatilityForTesting() const { return m_disableSnapshotVolatility; }
+
 #if !USE(IOSURFACE)
     static CAContext *snapshottingContext();
 #endif
@@ -126,9 +132,10 @@
     void willRemoveImageFromSnapshot(ViewSnapshot&);
     void pruneSnapshots(WebPageProxy&);
 
-    size_t m_snapshotCacheSize;
+    size_t m_snapshotCacheSize { 0 };
 
     ListHashSet<ViewSnapshot*> m_snapshotsWithImages;
+    bool m_disableSnapshotVolatility { false };
 };
 
 } // namespace WebKit

Modified: branches/safari-602-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.mm (207601 => 207602)


--- branches/safari-602-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.mm	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.mm	2016-10-20 09:59:48 UTC (rev 207602)
@@ -46,7 +46,6 @@
 namespace WebKit {
 
 ViewSnapshotStore::ViewSnapshotStore()
-    : m_snapshotCacheSize(0)
 {
 }
 
@@ -201,6 +200,19 @@
 #endif
 }
 
+#if USE(IOSURFACE)
+WebCore::IOSurface::SurfaceState ViewSnapshot::setVolatile(bool becomeVolatile)
+{
+    if (ViewSnapshotStore::singleton().disableSnapshotVolatilityForTesting())
+        return WebCore::IOSurface::SurfaceState::Valid;
+
+    if (!m_surface)
+        return WebCore::IOSurface::SurfaceState::Empty;
+
+    return m_surface->setIsVolatile(becomeVolatile);
+}
+#endif
+
 id ViewSnapshot::asLayerContents()
 {
 #if USE(IOSURFACE)
@@ -207,7 +219,7 @@
     if (!m_surface)
         return nullptr;
 
-    if (m_surface->setIsVolatile(false) != WebCore::IOSurface::SurfaceState::Valid) {
+    if (setVolatile(false) != WebCore::IOSurface::SurfaceState::Valid) {
         clearImage();
         return nullptr;
     }
@@ -218,4 +230,18 @@
 #endif
 }
 
+RetainPtr<CGImageRef> ViewSnapshot::asImageForTesting()
+{
+#if USE(IOSURFACE)
+    if (!m_surface)
+        return nullptr;
+
+    ASSERT(ViewSnapshotStore::singleton().disableSnapshotVolatilityForTesting());
+    return m_surface->createImage();
+#else
+    // FIXME: Implement this in the slot case.
+    return nullptr;
+#endif
+}
+
 } // namespace WebKit

Modified: branches/safari-602-branch/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj (207601 => 207602)


--- branches/safari-602-branch/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj	2016-10-20 09:59:48 UTC (rev 207602)
@@ -715,6 +715,7 @@
 		2DFC7DBB1BCCC19500C1548C /* WebViewImpl.h in Headers */ = {isa = PBXBuildFile; fileRef = 2DFC7DB91BCCC19500C1548C /* WebViewImpl.h */; };
 		2DFC7DBC1BCCC19500C1548C /* WebViewImpl.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2DFC7DBA1BCCC19500C1548C /* WebViewImpl.mm */; };
 		2E0B8A7A1BC59A590044B32D /* _WKFormDelegate.h in Headers */ = {isa = PBXBuildFile; fileRef = 2E0B8A791BC59A590044B32D /* _WKFormDelegate.h */; settings = {ATTRIBUTES = (Private, ); }; };
+		2DFF7B6F1DA4CFAF00814614 /* WKBackForwardListItemPrivate.h in Headers */ = {isa = PBXBuildFile; fileRef = 2DFF7B6E1DA4CFAF00814614 /* WKBackForwardListItemPrivate.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		2E7A944A1BBD97C300945547 /* _WKFocusedElementInfo.h in Headers */ = {isa = PBXBuildFile; fileRef = 2E7A94491BBD95C600945547 /* _WKFocusedElementInfo.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		31099973146C75A20029DEB9 /* WebNotificationClient.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 31099971146C759B0029DEB9 /* WebNotificationClient.cpp */; };
 		310999C7146C9E3D0029DEB9 /* WebNotificationClient.h in Headers */ = {isa = PBXBuildFile; fileRef = 31099968146C71F50029DEB9 /* WebNotificationClient.h */; };
@@ -2738,6 +2739,7 @@
 		2DFC7DB91BCCC19500C1548C /* WebViewImpl.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebViewImpl.h; sourceTree = "<group>"; };
 		2DFC7DBA1BCCC19500C1548C /* WebViewImpl.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = WebViewImpl.mm; sourceTree = "<group>"; };
 		2E0B8A791BC59A590044B32D /* _WKFormDelegate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = _WKFormDelegate.h; sourceTree = "<group>"; };
+		2DFF7B6E1DA4CFAF00814614 /* WKBackForwardListItemPrivate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKBackForwardListItemPrivate.h; sourceTree = "<group>"; };
 		2E7A94491BBD95C600945547 /* _WKFocusedElementInfo.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = _WKFocusedElementInfo.h; sourceTree = "<group>"; };
 		31099968146C71F50029DEB9 /* WebNotificationClient.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WebNotificationClient.h; sourceTree = "<group>"; };
 		31099971146C759B0029DEB9 /* WebNotificationClient.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = WebNotificationClient.cpp; sourceTree = "<group>"; };
@@ -5164,6 +5166,7 @@
 				37C4C08518149C5B003688B9 /* WKBackForwardListItem.h */,
 				37C4C08418149C5B003688B9 /* WKBackForwardListItem.mm */,
 				37C4C08818149F23003688B9 /* WKBackForwardListItemInternal.h */,
+				2DFF7B6E1DA4CFAF00814614 /* WKBackForwardListItemPrivate.h */,
 				1A9F28101958F478008CAC72 /* WKBackForwardListPrivate.h */,
 				1AF4592D19464B2000F9D4A2 /* WKError.h */,
 				1AF4592C19464B2000F9D4A2 /* WKError.mm */,
@@ -7957,6 +7960,7 @@
 				51EFC1CF1524E62500C9A938 /* WKBundleDOMWindowExtension.h in Headers */,
 				7CBB81211AA0F970006B1942 /* WKBundleFileHandleRef.h in Headers */,
 				BCD25F1711D6BDE100169B0E /* WKBundleFrame.h in Headers */,
+				2DFF7B6F1DA4CFAF00814614 /* WKBackForwardListItemPrivate.h in Headers */,
 				BCF049E611FE20F600F86A58 /* WKBundleFramePrivate.h in Headers */,
 				BC49862F124D18C100D834E1 /* WKBundleHitTestResult.h in Headers */,
 				BC204EF211C83EC8008F3375 /* WKBundleInitialize.h in Headers */,

Modified: branches/safari-602-branch/Tools/ChangeLog (207601 => 207602)


--- branches/safari-602-branch/Tools/ChangeLog	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Tools/ChangeLog	2016-10-20 09:59:48 UTC (rev 207602)
@@ -1,5 +1,32 @@
 2016-10-20  Matthew Hanson  <matthew_han...@apple.com>
 
+        Merge r206829. rdar://problem/28634858
+
+    2016-10-05  Tim Horton  <timothy_hor...@apple.com>
+
+            Make it possible to test ViewSnapshotStore behaviors
+            https://bugs.webkit.org/show_bug.cgi?id=162983
+
+            Reviewed by Simon Fraser.
+
+            * TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj:
+            * TestWebKitAPI/Tests/WebKit2Cocoa/SnapshotStore.mm: Added.
+            (-[SnapshotTestWKWebView init]):
+            (-[SnapshotTestWKWebView loadPageNamed:]):
+            (imagesAreEqual):
+            Add tests for existing basic snapshotting behavior:
+
+            - a back-forward item shouldn't have a snapshot
+              until it is navigated away from
+
+            - causing a back-forward item to fall out of the
+              back-forward list should remove the snapshot
+
+            - calling the explicit snapshotting SPI, then navigating away from the page,
+              should result in the snapshot being retaken
+
+2016-10-20  Matthew Hanson  <matthew_han...@apple.com>
+
         Merge r205329. rdar://problem/28634858
 
     2016-09-01  Tim Horton  <timothy_hor...@apple.com>

Modified: branches/safari-602-branch/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj (207601 => 207602)


--- branches/safari-602-branch/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj	2016-10-20 09:59:42 UTC (rev 207601)
+++ branches/safari-602-branch/Tools/TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj	2016-10-20 09:59:48 UTC (rev 207602)
@@ -57,6 +57,7 @@
 		2DD7D3AF178227B30026E1E3 /* lots-of-text-vertical-lr.html in Copy Resources */ = {isa = PBXBuildFile; fileRef = 2DD7D3AE178227AC0026E1E3 /* lots-of-text-vertical-lr.html */; };
 		2DE71AFE1D49C0BD00904094 /* AnimatedResize.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2DE71AFD1D49C0BD00904094 /* AnimatedResize.mm */; };
 		2DE71B001D49C3ED00904094 /* blinking-div.html in Copy Resources */ = {isa = PBXBuildFile; fileRef = 2DE71AFF1D49C2F000904094 /* blinking-div.html */; };
+		2DFF7B6D1DA487AF00814614 /* SnapshotStore.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2DFF7B6C1DA487AF00814614 /* SnapshotStore.mm */; };
 		2E131C181D83A98A001BA36C /* wide-autoplaying-video-with-audio.html in Copy Resources */ = {isa = PBXBuildFile; fileRef = 2E131C171D83A97E001BA36C /* wide-autoplaying-video-with-audio.html */; };
 		2E14A5291D3FE96B0010F35B /* autoplaying-video-with-audio.html in Copy Resources */ = {isa = PBXBuildFile; fileRef = 2E14A5281D3FE8B80010F35B /* autoplaying-video-with-audio.html */; };
 		2E1B7B001D41ABA7007558B4 /* large-video-seek-after-ending.html in Copy Resources */ = {isa = PBXBuildFile; fileRef = 2E1B7AFF1D41A95F007558B4 /* large-video-seek-after-ending.html */; };
@@ -758,6 +759,7 @@
 		2DD7D3AE178227AC0026E1E3 /* lots-of-text-vertical-lr.html */ = {isa = PBXFileReference; lastKnownFileType = text.html; path = "lots-of-text-vertical-lr.html"; sourceTree = "<group>"; };
 		2DE71AFD1D49C0BD00904094 /* AnimatedResize.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = AnimatedResize.mm; sourceTree = "<group>"; };
 		2DE71AFF1D49C2F000904094 /* blinking-div.html */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.html; path = "blinking-div.html"; sourceTree = "<group>"; };
+		2DFF7B6C1DA487AF00814614 /* SnapshotStore.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = SnapshotStore.mm; sourceTree = "<group>"; };
 		2E131C171D83A97E001BA36C /* wide-autoplaying-video-with-audio.html */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.html; path = "wide-autoplaying-video-with-audio.html"; sourceTree = "<group>"; };
 		2E14A5281D3FE8B80010F35B /* autoplaying-video-with-audio.html */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.html; path = "autoplaying-video-with-audio.html"; sourceTree = "<group>"; };
 		2E1B7AFF1D41A95F007558B4 /* large-video-seek-after-ending.html */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.html; path = "large-video-seek-after-ending.html"; sourceTree = "<group>"; };
@@ -1340,6 +1342,7 @@
 				CD9E292B1C90A71F000BB800 /* RequiresUserActionForPlayback.mm */,
 				37BCA61B1B596BA9002012CA /* ShouldOpenExternalURLsInNewWindowActions.mm */,
 				2D9A53AE1B31FA8D0074D5AA /* ShrinkToFit.mm */,
+				2DFF7B6C1DA487AF00814614 /* SnapshotStore.mm */,
 				515BE1701D428BD100DD7C68 /* StoreBlobThenDelete.mm */,
 				7CC3E1FA197E234100BE6252 /* UserContentController.mm */,
 				7C882E031C80C624006BF731 /* UserContentWorld.mm */,
@@ -2399,6 +2402,7 @@
 				7CCE7EDE1A411A9200447C4C /* URL.cpp in Sources */,
 				7CCE7EB01A411A4400447C4C /* URLExtras.mm in Sources */,
 				7C882E0A1C80C764006BF731 /* UserContentWorld.mm in Sources */,
+				2DFF7B6D1DA487AF00814614 /* SnapshotStore.mm in Sources */,
 				7CCE7F271A411AF600447C4C /* UserContentController.mm in Sources */,
 				7C83E04F1D0A641800FEBCF3 /* FileSystem.cpp in Sources */,
 				7C3DB8E41D12129B00AE8CC3 /* CommandBackForward.mm in Sources */,

Added: branches/safari-602-branch/Tools/TestWebKitAPI/Tests/WebKit2Cocoa/SnapshotStore.mm (0 => 207602)


--- branches/safari-602-branch/Tools/TestWebKitAPI/Tests/WebKit2Cocoa/SnapshotStore.mm	                        (rev 0)
+++ branches/safari-602-branch/Tools/TestWebKitAPI/Tests/WebKit2Cocoa/SnapshotStore.mm	2016-10-20 09:59:48 UTC (rev 207602)
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "config.h"
+#import <WebKit/WKFoundation.h>
+
+#if WK_API_ENABLED && PLATFORM(MAC)
+
+#import "_javascript_Test.h"
+#import "PlatformUtilities.h"
+#import "Test.h"
+#import "TestNavigationDelegate.h"
+#import "TestWKWebViewMac.h"
+#import <WebKit/WKBackForwardListItemPrivate.h>
+#import <WebKit/WKWebView.h>
+#import <WebKit/WKWebViewPrivate.h>
+#import <wtf/RetainPtr.h>
+
+using namespace TestWebKitAPI;
+
+@interface NSWindow ()
+- (void)_setWindowResolution:(CGFloat)resolution displayIfChanged:(BOOL)displayIfChanged;
+@end
+
+@interface WKWebView ()
+- (WKPageRef)_pageForTesting;
+@end
+
+@interface SnapshotTestWKWebView : TestWKWebView
+
+@end
+
+@implementation SnapshotTestWKWebView
+
+- (instancetype)init
+{
+    self = [super initWithFrame:NSMakeRect(0, 0, 800, 600)];
+    if (self) {
+        [self _setOverrideDeviceScaleFactor:1];
+        [self _disableBackForwardSnapshotVolatilityForTesting];
+        [self setAllowsBackForwardNavigationGestures:YES];
+        [self _setWindowOcclusionDetectionEnabled:NO];
+
+        [self.window _setWindowResolution:1 displayIfChanged:YES];
+        [self.window orderBack:nil];
+    }
+    return self;
+}
+
+- (void)loadPageNamed:(NSString *)pageName
+{
+    [self loadRequest:[NSURLRequest requestWithURL:[[NSBundle mainBundle] URLForResource:pageName withExtension:@"html" subdirectory:@"TestWebKitAPI.resources"]]];
+    [self _test_waitForDidFinishNavigation];
+}
+
+@end
+
+static bool imagesAreEqual(CGImageRef first, CGImageRef second)
+{
+    RetainPtr<NSData> firstData = adoptNS((NSData *)CGDataProviderCopyData(CGImageGetDataProvider(first)));
+    RetainPtr<NSData> secondData = adoptNS((NSData *)CGDataProviderCopyData(CGImageGetDataProvider(second)));
+
+    return [firstData isEqualTo:secondData.get()];
+}
+
+TEST(SnapshotStore, SnapshotUponNavigation)
+{
+    RetainPtr<SnapshotTestWKWebView> webView = adoptNS([[SnapshotTestWKWebView alloc] init]);
+
+    [webView loadPageNamed:@"simple"];
+
+    RetainPtr<WKBackForwardListItem> firstItem = [[webView backForwardList] currentItem];
+
+    RetainPtr<CGImageRef> imageBeforeNavigation = adoptCF([firstItem _copySnapshotForTesting]);
+    EXPECT_NULL(imageBeforeNavigation.get());
+
+    [webView loadPageNamed:@"lots-of-text"];
+
+    // After navigating, the first item should have a valid back-forward snapshot.
+    RetainPtr<CGImageRef> imageAfterNavigation = adoptCF([firstItem _copySnapshotForTesting]);
+    EXPECT_NOT_NULL(imageAfterNavigation.get());
+    EXPECT_EQ(CGImageGetWidth(imageAfterNavigation.get()), (unsigned long)800);
+}
+
+TEST(SnapshotStore, SnapshotClearedWhenItemIsRemoved)
+{
+    RetainPtr<SnapshotTestWKWebView> webView = adoptNS([[SnapshotTestWKWebView alloc] init]);
+
+    [webView loadPageNamed:@"simple"];
+    [webView loadPageNamed:@"lots-of-text"];
+
+    RetainPtr<WKBackForwardListItem> item = [[webView backForwardList] currentItem];
+
+    [webView loadPageNamed:@"simple"];
+
+    EXPECT_NOT_NULL(adoptCF([item _copySnapshotForTesting]).get());
+
+    [webView goBack];
+    [webView _test_waitForDidFinishNavigation];
+    [webView goBack];
+    [webView _test_waitForDidFinishNavigation];
+
+    // The original second item is still in the forward list, and should still have a snapshot.
+    EXPECT_NOT_NULL(adoptCF([item _copySnapshotForTesting]).get());
+
+    [webView loadPageNamed:@"lots-of-text"];
+
+    // The original second item shouldn't have an image anymore, because it was invalidated
+    // by navigating back past it and then doing another load.
+    EXPECT_NULL(adoptCF([item _copySnapshotForTesting]).get());
+}
+
+TEST(SnapshotStore, ExplicitSnapshotsChangeUponNavigation)
+{
+    RetainPtr<SnapshotTestWKWebView> webView = adoptNS([[SnapshotTestWKWebView alloc] init]);
+
+    [webView loadPageNamed:@"lots-of-text"];
+
+    RetainPtr<WKBackForwardListItem> firstItem = [[webView backForwardList] currentItem];
+    [webView _saveBackForwardSnapshotForItem:firstItem.get()];
+
+    RetainPtr<CGImageRef> initialSnapshot = adoptCF([firstItem _copySnapshotForTesting]);
+    EXPECT_NOT_NULL(initialSnapshot);
+
+    EXPECT_JS_EQ([webView _pageForTesting], "window.scrollTo(0,100)", "undefined");
+    [webView loadPageNamed:@"simple"];
+
+    // After navigating, the first item's snapshot should change.
+    RetainPtr<CGImageRef> snapshotAfterNavigation = adoptCF([firstItem _copySnapshotForTesting]);
+    EXPECT_NOT_NULL(snapshotAfterNavigation.get());
+    EXPECT_FALSE(imagesAreEqual(initialSnapshot.get(), snapshotAfterNavigation.get()));
+}
+
+#endif // WK_API_ENABLED && PLATFORM(MAC)
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