Title: [291564] trunk/Source
Revision
291564
Author
timothy_hor...@apple.com
Date
2022-03-21 10:44:45 -0700 (Mon, 21 Mar 2022)

Log Message

Add an addition point for system background color
https://bugs.webkit.org/show_bug.cgi?id=238108
<rdar://problem/90463946>

Reviewed by Aditya Keerthi.

Source/WebCore:

* SourcesCocoa.txt:
* WebCore.xcodeproj/project.pbxproj:
* platform/ios/WebCoreUIColorExtras.h: Added.
* platform/ios/WebCoreUIColorExtras.mm: Added.
(WebCore::systemBackgroundColor):
Add an addition point.

* rendering/RenderThemeIOS.mm:
(WebCore::CSSValueSystemColorInformation::function):
(WebCore::cssValueSystemColorInformationList):
(WebCore::systemColorFromCSSValueSystemColorInformation):
Adopt it for CSS use of system background color.

Source/WebKit:

* UIProcess/API/ios/WKWebViewIOS.mm:
(scrollViewBackgroundColor):
Adopt systemBackgroundColor().

* UIProcess/ios/PageClientImplIOS.mm:
(WebKit::PageClientImpl::contentViewBackgroundColor):
* UIProcess/ios/WebPageProxyIOS.mm:
(WebKit::WebPageProxy::platformUnderPageBackgroundColor const):
Move the fallback to systemBackgroundColor into PageClientImpl
so that it can realize the web view's trait collection.

Modified Paths

Added Paths

Diff

Modified: trunk/Source/WebCore/ChangeLog (291563 => 291564)


--- trunk/Source/WebCore/ChangeLog	2022-03-21 17:37:08 UTC (rev 291563)
+++ trunk/Source/WebCore/ChangeLog	2022-03-21 17:44:45 UTC (rev 291564)
@@ -1,3 +1,24 @@
+2022-03-21  Tim Horton  <timothy_hor...@apple.com>
+
+        Add an addition point for system background color
+        https://bugs.webkit.org/show_bug.cgi?id=238108
+        <rdar://problem/90463946>
+
+        Reviewed by Aditya Keerthi.
+
+        * SourcesCocoa.txt:
+        * WebCore.xcodeproj/project.pbxproj:
+        * platform/ios/WebCoreUIColorExtras.h: Added.
+        * platform/ios/WebCoreUIColorExtras.mm: Added.
+        (WebCore::systemBackgroundColor):
+        Add an addition point.
+
+        * rendering/RenderThemeIOS.mm:
+        (WebCore::CSSValueSystemColorInformation::function):
+        (WebCore::cssValueSystemColorInformationList):
+        (WebCore::systemColorFromCSSValueSystemColorInformation):
+        Adopt it for CSS use of system background color.
+
 2022-03-21  Alex Christensen  <achristen...@webkit.org>
 
         Dust off Mac CMake build

Modified: trunk/Source/WebCore/SourcesCocoa.txt (291563 => 291564)


--- trunk/Source/WebCore/SourcesCocoa.txt	2022-03-21 17:37:08 UTC (rev 291563)
+++ trunk/Source/WebCore/SourcesCocoa.txt	2022-03-21 17:44:45 UTC (rev 291564)
@@ -480,6 +480,7 @@
 platform/ios/WebBackgroundTaskController.mm
 platform/ios/WebCoreMotionManager.mm
 platform/ios/WebEvent.mm @no-unify
+platform/ios/WebCoreUIColorExtras.mm
 platform/ios/WebItemProviderPasteboard.mm @no-unify
 platform/ios/WebSQLiteDatabaseTrackerClient.mm
 platform/ios/WebVideoFullscreenControllerAVKit.mm @no-unify

Modified: trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj (291563 => 291564)


--- trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj	2022-03-21 17:37:08 UTC (rev 291563)
+++ trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj	2022-03-21 17:44:45 UTC (rev 291564)
@@ -862,6 +862,7 @@
 		2D8B92FD203D13E1009C868F /* UnifiedSource528.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE5F85D21FA23856006DB63B /* UnifiedSource528.cpp */; };
 		2D8B92FE203D13E1009C868F /* UnifiedSource529.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE5F85CF1FA23850006DB63B /* UnifiedSource529.cpp */; };
 		2D8B92FF203D13E1009C868F /* UnifiedSource530.cpp in Sources */ = {isa = PBXBuildFile; fileRef = DE5F85D31FA23859006DB63B /* UnifiedSource530.cpp */; };
+		2D8BA18127E5A487008F7E52 /* WebCoreUIColorExtras.h in Headers */ = {isa = PBXBuildFile; fileRef = 2D8BA18027E5A47B008F7E52 /* WebCoreUIColorExtras.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		2D8FEBDD143E3EF70072502B /* CSSCrossfadeValue.h in Headers */ = {isa = PBXBuildFile; fileRef = 2D8FEBDB143E3EF70072502B /* CSSCrossfadeValue.h */; };
 		2D9066070BE141D400956998 /* RenderLayoutState.h in Headers */ = {isa = PBXBuildFile; fileRef = 2D9066050BE141D400956998 /* RenderLayoutState.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		2D93AEE319DF5641002A86C3 /* ServicesOverlayController.h in Headers */ = {isa = PBXBuildFile; fileRef = 2D93AEE119DF5641002A86C3 /* ServicesOverlayController.h */; };
@@ -8107,6 +8108,8 @@
 		2D7ED0A91BAE99170043B3E5 /* TimerEventBasedMock.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TimerEventBasedMock.h; sourceTree = "<group>"; };
 		2D8287F416E4A0380086BD00 /* HitTestLocation.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = HitTestLocation.cpp; sourceTree = "<group>"; };
 		2D8287F516E4A0380086BD00 /* HitTestLocation.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HitTestLocation.h; sourceTree = "<group>"; };
+		2D8BA17F27E5A47A008F7E52 /* WebCoreUIColorExtras.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = WebCoreUIColorExtras.mm; sourceTree = "<group>"; };
+		2D8BA18027E5A47B008F7E52 /* WebCoreUIColorExtras.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WebCoreUIColorExtras.h; sourceTree = "<group>"; };
 		2D8D3BEB23847AC900657075 /* gesture-recognizer.js */ = {isa = PBXFileReference; lastKnownFileType = sourcecode._javascript_; path = "gesture-recognizer.js"; sourceTree = "<group>"; };
 		2D8D3BEC23847AC900657075 /* pinch.js */ = {isa = PBXFileReference; lastKnownFileType = sourcecode._javascript_; path = pinch.js; sourceTree = "<group>"; };
 		2D8D3BED23847AC900657075 /* tap.js */ = {isa = PBXFileReference; lastKnownFileType = sourcecode._javascript_; path = tap.js; sourceTree = "<group>"; };
@@ -26785,6 +26788,8 @@
 				1F36EA9B1E21BA1700621E25 /* WebBackgroundTaskController.mm */,
 				31403797124BEA7F00AF40E4 /* WebCoreMotionManager.h */,
 				31403798124BEA7F00AF40E4 /* WebCoreMotionManager.mm */,
+				2D8BA18027E5A47B008F7E52 /* WebCoreUIColorExtras.h */,
+				2D8BA17F27E5A47A008F7E52 /* WebCoreUIColorExtras.mm */,
 				FE0D84E810484348001A179E /* WebEvent.h */,
 				FE0D84EA1048436E001A179E /* WebEvent.mm */,
 				F482230F1E3869B80066FC79 /* WebItemProviderPasteboard.h */,
@@ -38054,6 +38059,7 @@
 				A14832CC187F67C400DA63A6 /* WebCoreThreadRun.h in Headers */,
 				A14832CF187F684700DA63A6 /* WebCoreThreadSystemInterface.h in Headers */,
 				0F099D0917B968A100FF84B9 /* WebCoreTypedArrayController.h in Headers */,
+				2D8BA18127E5A487008F7E52 /* WebCoreUIColorExtras.h in Headers */,
 				37F818FD0D657606005E1F05 /* WebCoreURLResponse.h in Headers */,
 				44A20DB90F84166C00B3E1FE /* WebCoreURLResponseIOS.h in Headers */,
 				93F199F008245E59001E9ABC /* WebCoreView.h in Headers */,

Added: trunk/Source/WebCore/platform/ios/WebCoreUIColorExtras.h (0 => 291564)


--- trunk/Source/WebCore/platform/ios/WebCoreUIColorExtras.h	                        (rev 0)
+++ trunk/Source/WebCore/platform/ios/WebCoreUIColorExtras.h	2022-03-21 17:44:45 UTC (rev 291564)
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+#pragma once
+
+#if PLATFORM(IOS_FAMILY)
+
+namespace WebCore {
+
+WEBCORE_EXPORT UIColor *systemBackgroundColor();
+
+} // namespace WebCore
+
+#endif

Added: trunk/Source/WebCore/platform/ios/WebCoreUIColorExtras.mm (0 => 291564)


--- trunk/Source/WebCore/platform/ios/WebCoreUIColorExtras.mm	                        (rev 0)
+++ trunk/Source/WebCore/platform/ios/WebCoreUIColorExtras.mm	2022-03-21 17:44:45 UTC (rev 291564)
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2022 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 "WebCoreUIColorExtras.h"
+
+#if PLATFORM(IOS_FAMILY)
+
+#import <pal/ios/UIKitSoftLink.h>
+
+#if USE(APPLE_INTERNAL_SDK) && __has_include(<WebKitAdditions/WebCoreUIColorExtrasAdditions.mm>)
+
+#import <WebKitAdditions/WebCoreUIColorExtrasAdditions.mm>
+
+#else
+
+namespace WebCore {
+
+UIColor *systemBackgroundColor()
+{
+    return (UIColor *)[PAL::getUIColorClass() systemBackgroundColor];
+}
+
+} // namespace WebCore
+
+#endif
+
+#endif // PLATFORM(IOS_FAMILY)

Modified: trunk/Source/WebCore/rendering/RenderThemeIOS.mm (291563 => 291564)


--- trunk/Source/WebCore/rendering/RenderThemeIOS.mm	2022-03-21 17:37:08 UTC (rev 291563)
+++ trunk/Source/WebCore/rendering/RenderThemeIOS.mm	2022-03-21 17:44:45 UTC (rev 291564)
@@ -80,6 +80,7 @@
 #import "Theme.h"
 #import "UTIUtilities.h"
 #import "WebCoreThreadRun.h"
+#import "WebCoreUIColorExtras.h"
 #import <CoreGraphics/CoreGraphics.h>
 #import <CoreImage/CoreImage.h>
 #import <objc/runtime.h>
@@ -1444,6 +1445,7 @@
     SEL selector;
     bool makeOpaque { false };
     float opacity { 1.0f };
+    UIColor *(*function)(void) { nullptr };
 };
 
 static const Vector<CSSValueSystemColorInformation>& cssValueSystemColorInformationList()
@@ -1456,7 +1458,7 @@
         [] {
         cssValueSystemColorInformationList.get() = Vector(std::initializer_list<CSSValueSystemColorInformation> {
             { CSSValueText, @selector(labelColor) },
-            { CSSValueWebkitControlBackground, @selector(systemBackgroundColor) },
+            { CSSValueWebkitControlBackground, nil, false, 1.0f, &systemBackgroundColor },
             { CSSValueAppleSystemBlue, @selector(systemBlueColor) },
             { CSSValueAppleSystemBrown, @selector(systemBrownColor) },
             { CSSValueAppleSystemGray, @selector(systemGrayColor) },
@@ -1468,7 +1470,7 @@
             { CSSValueAppleSystemRed, @selector(systemRedColor) },
             { CSSValueAppleSystemTeal, @selector(systemTealColor) },
             { CSSValueAppleSystemYellow, @selector(systemYellowColor) },
-            { CSSValueAppleSystemBackground, @selector(systemBackgroundColor) },
+            { CSSValueAppleSystemBackground, nil, false, 1.0f, &systemBackgroundColor },
             { CSSValueAppleSystemSecondaryBackground, @selector(secondarySystemBackgroundColor) },
             { CSSValueAppleSystemTertiaryBackground, @selector(tertiarySystemBackgroundColor) },
             { CSSValueAppleSystemOpaqueFill, @selector(systemFillColor), true },
@@ -1488,11 +1490,11 @@
             // FIXME: <rdar://problem/79471528> Adopt [UIColor opaqueSeparatorColor] once it has a high contrast variant.
             { CSSValueAppleSystemOpaqueSeparator, @selector(separatorColor), true },
             { CSSValueAppleSystemContainerBorder, @selector(separatorColor) },
-            { CSSValueAppleSystemControlBackground, @selector(systemBackgroundColor) },
+            { CSSValueAppleSystemControlBackground, nil, false, 1.0f, &systemBackgroundColor },
             { CSSValueAppleSystemGrid, @selector(separatorColor) },
             { CSSValueAppleSystemHeaderText, @selector(labelColor) },
             { CSSValueAppleSystemSelectedContentBackground, @selector(tableCellDefaultSelectionTintColor) },
-            { CSSValueAppleSystemTextBackground, @selector(systemBackgroundColor) },
+            { CSSValueAppleSystemTextBackground, nil, false, 1.0f, &systemBackgroundColor },
             { CSSValueAppleSystemUnemphasizedSelectedContentBackground, @selector(tableCellDefaultSelectionTintColor) },
             { CSSValueAppleWirelessPlaybackTargetActive, @selector(systemBlueColor) },
         });
@@ -1503,19 +1505,24 @@
 
 static inline std::optional<Color> systemColorFromCSSValueSystemColorInformation(CSSValueSystemColorInformation systemColorInformation, bool useDarkAppearance)
 {
-    if (auto color = wtfObjCMsgSend<UIColor *>(PAL::getUIColorClass(), systemColorInformation.selector)) {
-        Color systemColor(roundAndClampToSRGBALossy(color.CGColor), Color::Flags::Semantic);
+    UIColor *color = nil;
+    if (systemColorInformation.selector)
+        color = wtfObjCMsgSend<UIColor *>(PAL::getUIColorClass(), systemColorInformation.selector);
+    else
+        color = systemColorInformation.function();
 
-        if (systemColorInformation.opacity < 1.0f)
-            systemColor = systemColor.colorWithAlphaMultipliedBy(systemColorInformation.opacity);
+    if (!color)
+        return std::nullopt;
 
-        if (systemColorInformation.makeOpaque)
-            return blendSourceOver(useDarkAppearance ? Color::black : Color::white, systemColor);
+    Color systemColor(roundAndClampToSRGBALossy(color.CGColor), Color::Flags::Semantic);
 
-        return systemColor;
-    }
+    if (systemColorInformation.opacity < 1.0f)
+        systemColor = systemColor.colorWithAlphaMultipliedBy(systemColorInformation.opacity);
 
-    return std::nullopt;
+    if (systemColorInformation.makeOpaque)
+        return blendSourceOver(useDarkAppearance ? Color::black : Color::white, systemColor);
+
+    return systemColor;
 }
 
 static std::optional<Color> systemColorFromCSSValueID(CSSValueID cssValueID, bool useDarkAppearance, bool useElevatedUserInterfaceLevel)

Modified: trunk/Source/WebKit/ChangeLog (291563 => 291564)


--- trunk/Source/WebKit/ChangeLog	2022-03-21 17:37:08 UTC (rev 291563)
+++ trunk/Source/WebKit/ChangeLog	2022-03-21 17:44:45 UTC (rev 291564)
@@ -1,3 +1,22 @@
+2022-03-21  Tim Horton  <timothy_hor...@apple.com>
+
+        Add an addition point for system background color
+        https://bugs.webkit.org/show_bug.cgi?id=238108
+        <rdar://problem/90463946>
+
+        Reviewed by Aditya Keerthi.
+
+        * UIProcess/API/ios/WKWebViewIOS.mm:
+        (scrollViewBackgroundColor):
+        Adopt systemBackgroundColor().
+
+        * UIProcess/ios/PageClientImplIOS.mm:
+        (WebKit::PageClientImpl::contentViewBackgroundColor):
+        * UIProcess/ios/WebPageProxyIOS.mm:
+        (WebKit::WebPageProxy::platformUnderPageBackgroundColor const):
+        Move the fallback to systemBackgroundColor into PageClientImpl
+        so that it can realize the web view's trait collection.
+
 2022-03-21  Adam Mazander  <mazan...@apple.com>
 
         Sandbox: Remove telemetry in Network Process sandbox macOS

Modified: trunk/Source/WebKit/UIProcess/API/ios/WKWebViewIOS.mm (291563 => 291564)


--- trunk/Source/WebKit/UIProcess/API/ios/WKWebViewIOS.mm	2022-03-21 17:37:08 UTC (rev 291563)
+++ trunk/Source/WebKit/UIProcess/API/ios/WKWebViewIOS.mm	2022-03-21 17:44:45 UTC (rev 291564)
@@ -61,6 +61,7 @@
 #import <WebCore/LocalCurrentTraitCollection.h>
 #import <WebCore/MIMETypeRegistry.h>
 #import <WebCore/RuntimeApplicationChecks.h>
+#import <WebCore/WebCoreUIColorExtras.h>
 #import <pal/spi/cocoa/QuartzCoreSPI.h>
 #import <pal/spi/ios/GraphicsServicesSPI.h>
 #import <wtf/BlockPtr.h>
@@ -542,7 +543,7 @@
 
     if (!color.isValid()) {
 #if HAVE(OS_DARK_MODE_SUPPORT)
-        color = WebCore::roundAndClampToSRGBALossy(UIColor.systemBackgroundColor.CGColor);
+        color = WebCore::roundAndClampToSRGBALossy(WebCore::systemBackgroundColor().CGColor);
 #else
         color = WebCore::Color::white;
 #endif

Modified: trunk/Source/WebKit/UIProcess/ios/PageClientImplIOS.mm (291563 => 291564)


--- trunk/Source/WebKit/UIProcess/ios/PageClientImplIOS.mm	2022-03-21 17:37:08 UTC (rev 291563)
+++ trunk/Source/WebKit/UIProcess/ios/PageClientImplIOS.mm	2022-03-21 17:44:45 UTC (rev 291564)
@@ -64,6 +64,7 @@
 #import <WebCore/Cursor.h>
 #import <WebCore/DOMPasteAccess.h>
 #import <WebCore/DictionaryLookup.h>
+#import <WebCore/LocalCurrentTraitCollection.h>
 #import <WebCore/NotImplemented.h>
 #import <WebCore/PlatformScreen.h>
 #import <WebCore/PromisedAttachmentInfo.h>
@@ -71,6 +72,7 @@
 #import <WebCore/SharedBuffer.h>
 #import <WebCore/TextIndicator.h>
 #import <WebCore/ValidationBubble.h>
+#import <WebCore/WebCoreUIColorExtras.h>
 #import <wtf/BlockPtr.h>
 #import <wtf/cocoa/Entitlements.h>
 
@@ -1018,7 +1020,18 @@
 
 WebCore::Color PageClientImpl::contentViewBackgroundColor()
 {
-    return WebCore::roundAndClampToSRGBALossy([m_contentView backgroundColor].CGColor);
+#if HAVE(OS_DARK_MODE_SUPPORT)
+    WebCore::LocalCurrentTraitCollection localTraitCollection([m_webView traitCollection]);
+#endif
+
+    WebCore::Color color = WebCore::roundAndClampToSRGBALossy([m_contentView backgroundColor].CGColor);
+    if (color.isValid())
+        return color;
+#if HAVE(OS_DARK_MODE_SUPPORT)
+    return WebCore::roundAndClampToSRGBALossy(WebCore::systemBackgroundColor().CGColor);
+#else
+    return { };
+#endif
 }
 
 void PageClientImpl::requestScrollToRect(const FloatRect& targetRect, const FloatPoint& origin)

Modified: trunk/Source/WebKit/UIProcess/ios/WebPageProxyIOS.mm (291563 => 291564)


--- trunk/Source/WebKit/UIProcess/ios/WebPageProxyIOS.mm	2022-03-21 17:37:08 UTC (rev 291563)
+++ trunk/Source/WebKit/UIProcess/ios/WebPageProxyIOS.mm	2022-03-21 17:44:45 UTC (rev 291564)
@@ -1600,11 +1600,7 @@
     if (auto contentViewBackgroundColor = pageClient().contentViewBackgroundColor(); contentViewBackgroundColor.isValid())
         return contentViewBackgroundColor;
 
-#if HAVE(OS_DARK_MODE_SUPPORT)
-    return WebCore::roundAndClampToSRGBALossy(UIColor.systemBackgroundColor.CGColor);
-#else
     return WebCore::Color::white;
-#endif
 }
 
 } // namespace WebKit
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