Attachment #350409 for bug #188043

View Details Raw Unified Return to Bug 188043

| Differences between

and this patch

Lines 1-4 a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-default-css-expected.txt_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-default-css-expected.txt -1 / +1 lines
1		1
2	PASS Instant scrolling of an element with default scroll-behavior	2	PASS Instant scrolling of an element with default scroll-behavior
3	FAIL Smooth scrolling of an element with default scroll-behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	3	PASS Smooth scrolling of an element with default scroll-behavior
4		4

Lines 1-4 a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-default-css.html_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-default-css.html -1 / +1 lines
1	<!DOCTYPE html>	1	<!DOCTYPE html><!-- webkit-test-runner [ experimental:CSSomSmoothScrollingEnabled=true ] -->
2	<title>Testing default value of scroll-behavior</title>	2	<title>Testing default value of scroll-behavior</title>
3	<meta name="timeout" content="long"/>	3	<meta name="timeout" content="long"/>
4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">	4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">



PASS Element with auto scroll-behavior ; scroll() with default behavior 
PASS Element with auto scroll-behavior ; scroll() with auto behavior 
PASS Element with auto scroll-behavior ; scroll() with instant behavior 
PASS Element with auto scroll-behavior ; scroll() with smooth behavior 
PASS Element with smooth scroll-behavior ; scroll() with default behavior 
PASS Element with smooth scroll-behavior ; scroll() with auto behavior 
PASS Element with smooth scroll-behavior ; scroll() with instant behavior 
PASS Element with smooth scroll-behavior ; scroll() with smooth behavior 
PASS Element with auto scroll-behavior ; scrollTo() with default behavior 
PASS Element with auto scroll-behavior ; scrollTo() with auto behavior 
PASS Element with auto scroll-behavior ; scrollTo() with instant behavior 
PASS Element with auto scroll-behavior ; scrollTo() with smooth behavior 
PASS Element with smooth scroll-behavior ; scrollTo() with default behavior 
PASS Element with smooth scroll-behavior ; scrollTo() with auto behavior 
PASS Element with smooth scroll-behavior ; scrollTo() with instant behavior 
PASS Element with smooth scroll-behavior ; scrollTo() with smooth behavior 
PASS Element with auto scroll-behavior ; scrollBy() with default behavior 
PASS Element with auto scroll-behavior ; scrollBy() with auto behavior 
PASS Element with auto scroll-behavior ; scrollBy() with instant behavior 
PASS Element with auto scroll-behavior ; scrollBy() with smooth behavior 
PASS Element with smooth scroll-behavior ; scrollBy() with default behavior 
PASS Element with smooth scroll-behavior ; scrollBy() with auto behavior 
PASS Element with smooth scroll-behavior ; scrollBy() with instant behavior 
PASS Element with smooth scroll-behavior ; scrollBy() with smooth behavior 
PASS Element with auto scroll-behavior ; scrollIntoView() with default behavior 
PASS Element with auto scroll-behavior ; scrollIntoView() with auto behavior 
PASS Element with auto scroll-behavior ; scrollIntoView() with instant behavior 
PASS Element with auto scroll-behavior ; scrollIntoView() with smooth behavior 
PASS Element with smooth scroll-behavior ; scrollIntoView() with default behavior 
PASS Element with smooth scroll-behavior ; scrollIntoView() with auto behavior 
PASS Element with smooth scroll-behavior ; scrollIntoView() with instant behavior 
PASS Element with smooth scroll-behavior ; scrollIntoView() with smooth behavior 
PASS Aborting an ongoing smooth scrolling on an element with another smooth scrolling 
PASS Aborting an ongoing smooth scrolling on an element with an instant scrolling 


Lines 1-4 a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-element.html_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-element.html -1 / +1 lines
1	<!DOCTYPE html>	1	<!DOCTYPE html><!-- webkit-test-runner [ experimental:CSSomSmoothScrollingEnabled=true ] -->
2	<title>Testing scrollOptions' behavior for Element.scroll* and scroll-behavior on an element</title>	2	<title>Testing scrollOptions' behavior for Element.scroll* and scroll-behavior on an element</title>
3	<meta name="timeout" content="long"/>	3	<meta name="timeout" content="long"/>
4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">	4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">



PASS Main frame with auto scroll-behavior ; scroll() with default behavior 
PASS Main frame with auto scroll-behavior ; scroll() with auto behavior 
PASS Main frame with auto scroll-behavior ; scroll() with instant behavior 
PASS Main frame with auto scroll-behavior ; scroll() with smooth behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with default behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with auto behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with instant behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with smooth behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with default behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with auto behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with instant behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with smooth behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with default behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with auto behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with instant behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with smooth behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with default behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with auto behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with instant behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with smooth behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with default behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with auto behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with instant behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with smooth behavior 
PASS Main frame with auto scroll-behavior ; scrollIntoView() with default behavior 
PASS Main frame with auto scroll-behavior ; scrollIntoView() with auto behavior 
PASS Main frame with auto scroll-behavior ; scrollIntoView() with instant behavior 
PASS Main frame with auto scroll-behavior ; scrollIntoView() with smooth behavior 
PASS Main frame with smooth scroll-behavior ; scrollIntoView() with default behavior 
PASS Main frame with smooth scroll-behavior ; scrollIntoView() with auto behavior 
PASS Main frame with smooth scroll-behavior ; scrollIntoView() with instant behavior 
PASS Main frame with smooth scroll-behavior ; scrollIntoView() with smooth behavior 
PASS Aborting an ongoing smooth scrolling on the main frame with another smooth scrolling 
PASS Aborting an ongoing smooth scrolling on the main frame with an instant scrolling 


Lines 1-4 a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-main-frame-root.html_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-main-frame-root.html -1 / +1 lines
1	<!DOCTYPE html>	1	<!DOCTYPE html><!-- webkit-test-runner [ experimental:CSSomSmoothScrollingEnabled=true ] -->
2	<title>Testing scrollOptions' behavior for Element.scroll* and scroll-behavior on the root of the main frame</title>	2	<title>Testing scrollOptions' behavior for Element.scroll* and scroll-behavior on the root of the main frame</title>
3	<meta name="timeout" content="long"/>	3	<meta name="timeout" content="long"/>
4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">	4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">



PASS Main frame with auto scroll-behavior ; scroll() with default behavior 
PASS Main frame with auto scroll-behavior ; scroll() with auto behavior 
PASS Main frame with auto scroll-behavior ; scroll() with instant behavior 
PASS Main frame with auto scroll-behavior ; scroll() with smooth behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with default behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with auto behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with instant behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with smooth behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with default behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with auto behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with instant behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with smooth behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with default behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with auto behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with instant behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with smooth behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with default behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with auto behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with instant behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with smooth behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with default behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with auto behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with instant behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with smooth behavior 
PASS Aborting an ongoing smooth scrolling on the main frame with another smooth scrolling 
PASS Aborting an ongoing smooth scrolling on the main frame with an instant scrolling 


Lines 1-4 a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-main-frame-window.html_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-main-frame-window.html -1 / +1 lines
1	<!DOCTYPE html>	1	<!DOCTYPE html><!-- webkit-test-runner [ experimental:CSSomSmoothScrollingEnabled=true ] -->
2	<title>Testing scrollOptions' behavior for Element.scroll* on the window of the main frame</title>	2	<title>Testing scrollOptions' behavior for Element.scroll* on the window of the main frame</title>
3	<meta name="timeout" content="long"/>	3	<meta name="timeout" content="long"/>
4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">	4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">

Lines 1-3 a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-scrollintoview-nested-expected.txt_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-scrollintoview-nested-expected.txt -1 / +3 lines
1		1
2	FAIL scrollIntoView with nested elements with different scroll-behavior assert_less_than: Element with smooth behavior should not scroll immediately expected a number less than 500 but got 500	2	FAIL scrollIntoView with nested elements with different scroll-behavior assert_equals: Element with instant behavior should jump to the final position expected 0 but got 1000
		3
		4	assert_equals: Element with instant behavior should jump to the final position expected 500 but got 1000
3		5

Lines 1-4 a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-scrollintoview-nested.html_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-scrollintoview-nested.html -1 / +1 lines
1	<!DOCTYPE html>	1	<!DOCTYPE html><!-- webkit-test-runner [ experimental:CSSomSmoothScrollingEnabled=true ] -->
2	<title>Testing scrollOptions' behavior with scrollIntoView for nested scrolling nodes</title>	2	<title>Testing scrollOptions' behavior with scrollIntoView for nested scrolling nodes</title>
3	<meta name="timeout" content="long"/>	3	<meta name="timeout" content="long"/>
4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">	4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">

Lines 1-4 a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-smooth-positions.html_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-smooth-positions.html -1 / +1 lines
1	<!DOCTYPE html>	1	<!DOCTYPE html><!-- webkit-test-runner [ experimental:CSSomSmoothScrollingEnabled=true ] -->
2	<title>Testing scroll positions when scrolling an element with smooth behavior</title>	2	<title>Testing scroll positions when scrolling an element with smooth behavior</title>
3	<meta name="timeout" content="long"/>	3	<meta name="timeout" content="long"/>
4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">	4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">



PASS Subframe with auto scroll-behavior ; scroll() with default behavior 
PASS Subframe with auto scroll-behavior ; scroll() with auto behavior 
PASS Subframe with auto scroll-behavior ; scroll() with instant behavior 
PASS Subframe with auto scroll-behavior ; scroll() with smooth behavior 
PASS Subframe with smooth scroll-behavior ; scroll() with default behavior 
PASS Subframe with smooth scroll-behavior ; scroll() with auto behavior 
PASS Subframe with smooth scroll-behavior ; scroll() with instant behavior 
PASS Subframe with smooth scroll-behavior ; scroll() with smooth behavior 
PASS Subframe with auto scroll-behavior ; scrollTo() with default behavior 
PASS Subframe with auto scroll-behavior ; scrollTo() with auto behavior 
PASS Subframe with auto scroll-behavior ; scrollTo() with instant behavior 
PASS Subframe with auto scroll-behavior ; scrollTo() with smooth behavior 
PASS Subframe with smooth scroll-behavior ; scrollTo() with default behavior 
PASS Subframe with smooth scroll-behavior ; scrollTo() with auto behavior 
PASS Subframe with smooth scroll-behavior ; scrollTo() with instant behavior 
PASS Subframe with smooth scroll-behavior ; scrollTo() with smooth behavior 
PASS Subframe with auto scroll-behavior ; scrollBy() with default behavior 
PASS Subframe with auto scroll-behavior ; scrollBy() with auto behavior 
PASS Subframe with auto scroll-behavior ; scrollBy() with instant behavior 
PASS Subframe with auto scroll-behavior ; scrollBy() with smooth behavior 
PASS Subframe with smooth scroll-behavior ; scrollBy() with default behavior 
PASS Subframe with smooth scroll-behavior ; scrollBy() with auto behavior 
PASS Subframe with smooth scroll-behavior ; scrollBy() with instant behavior 
PASS Subframe with smooth scroll-behavior ; scrollBy() with smooth behavior 
PASS Subframe with auto scroll-behavior ; scrollIntoView() with default behavior 
PASS Subframe with auto scroll-behavior ; scrollIntoView() with auto behavior 
PASS Subframe with auto scroll-behavior ; scrollIntoView() with instant behavior 
PASS Subframe with auto scroll-behavior ; scrollIntoView() with smooth behavior 
PASS Subframe with smooth scroll-behavior ; scrollIntoView() with default behavior 
PASS Subframe with smooth scroll-behavior ; scrollIntoView() with auto behavior 
PASS Subframe with smooth scroll-behavior ; scrollIntoView() with instant behavior 
PASS Subframe with smooth scroll-behavior ; scrollIntoView() with smooth behavior 
PASS Aborting an ongoing smooth scrolling on a subframe with another smooth scrolling 
PASS Aborting an ongoing smooth scrolling on a subframe with an instant scrolling 


Lines 1-4 a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-subframe-root.html_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-subframe-root.html -1 / +1 lines
1	<!DOCTYPE html>	1	<!DOCTYPE html><!-- webkit-test-runner [ experimental:CSSomSmoothScrollingEnabled=true ] -->
2	<title>Testing scrollOptions' behavior for Element.scroll* and scroll-behavior on the root of a subframe</title>	2	<title>Testing scrollOptions' behavior for Element.scroll* and scroll-behavior on the root of a subframe</title>
3	<meta name="timeout" content="long"/>	3	<meta name="timeout" content="long"/>
4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">	4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">



PASS Main frame with auto scroll-behavior ; scroll() with default behavior 
PASS Main frame with auto scroll-behavior ; scroll() with auto behavior 
PASS Main frame with auto scroll-behavior ; scroll() with instant behavior 
PASS Main frame with auto scroll-behavior ; scroll() with smooth behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with default behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with auto behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with instant behavior 
PASS Main frame with smooth scroll-behavior ; scroll() with smooth behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with default behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with auto behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with instant behavior 
PASS Main frame with auto scroll-behavior ; scrollTo() with smooth behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with default behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with auto behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with instant behavior 
PASS Main frame with smooth scroll-behavior ; scrollTo() with smooth behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with default behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with auto behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with instant behavior 
PASS Main frame with auto scroll-behavior ; scrollBy() with smooth behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with default behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with auto behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with instant behavior 
PASS Main frame with smooth scroll-behavior ; scrollBy() with smooth behavior 
PASS Aborting an ongoing smooth scrolling on the main frame with another smooth scrolling 
PASS Aborting an ongoing smooth scrolling on the main frame with an instant scrolling 


Lines 1-4 a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-subframe-window.html_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-subframe-window.html -1 / +1 lines
1	<!DOCTYPE html>	1	<!DOCTYPE html><!-- webkit-test-runner [ experimental:CSSomSmoothScrollingEnabled=true ] -->
2	<title>Testing scrollOptions' behavior for Element.scroll* and scroll-behavior on the root of a subframe</title>	2	<title>Testing scrollOptions' behavior for Element.scroll* and scroll-behavior on the root of a subframe</title>
3	<meta name="timeout" content="long"/>	3	<meta name="timeout" content="long"/>
4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">	4	<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">

Lines 40-45 ENABLE_ACCELERATED_2D_CANVAS = ; a/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig_sec1
- a/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig -1 / +3 lines
40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));	40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));
41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;	41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;
42		42
		43	ENABLE_CSSOM_SMOOTH_SCROLLING = ENABLE_CSSOM_SMOOTH_SCROLLING;
		44
43	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));	45	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));
44	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;	46	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;
45	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;	47	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;
Lines 374-377 ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET; a/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig_sec2
374		376
375	ENABLE_XSLT = ENABLE_XSLT;	377	ENABLE_XSLT = ENABLE_XSLT;
376		378
377	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);	379	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_CSSOM_SMOOTH_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);

Lines 361-366 the public iOS SDK. See <https://webkit.org/b/179167>. */ a/Source/WTF/wtf/FeatureDefines.h_sec1
- a/Source/WTF/wtf/FeatureDefines.h +4 lines
361	#define ENABLE_ACCELERATED_OVERFLOW_SCROLLING 0	361	#define ENABLE_ACCELERATED_OVERFLOW_SCROLLING 0
362	#endif	362	#endif
363		363
		364	#if !defined(ENABLE_CSSOM_SMOOTH_SCROLLING)
		365	#define ENABLE_CSSOM_SMOOTH_SCROLLING 1
		366	#endif
		367
364	#if !defined(ENABLE_APNG)	368	#if !defined(ENABLE_APNG)
365	#define ENABLE_APNG 1	369	#define ENABLE_APNG 1
366	#endif	370	#endif

Lines 1051-1056 else () a/Source/WebCore/CMakeLists.txt_sec1
- a/Source/WebCore/CMakeLists.txt +7 lines
1051	set(ANGLE_FORWARDING_HEADERS_DIR "${FORWARDING_HEADERS_DIR}/ANGLE")	1051	set(ANGLE_FORWARDING_HEADERS_DIR "${FORWARDING_HEADERS_DIR}/ANGLE")
1052	endif ()	1052	endif ()
1053		1053
		1054	if (ENABLE_CSSOM_SMOOTH_SCROLLING)
		1055	list(APPEND WebCore_NON_SVG_IDL_FILES
		1056	page/ScrollBehavior.idl
		1057	page/ScrollOptions.idl
		1058	)
		1059	endif ()
		1060
1054	if (ENABLE_GAMEPAD)	1061	if (ENABLE_GAMEPAD)
1055	list(APPEND WebCore_INCLUDE_DIRECTORIES	1062	list(APPEND WebCore_INCLUDE_DIRECTORIES
1056	"${WEBCORE_DIR}/Modules/gamepad"	1063	"${WEBCORE_DIR}/Modules/gamepad"

Lines 40-45 ENABLE_ACCELERATED_2D_CANVAS = ; a/Source/WebCore/Configurations/FeatureDefines.xcconfig_sec1
- a/Source/WebCore/Configurations/FeatureDefines.xcconfig -1 / +3 lines
40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));	40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));
41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;	41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;
42		42
		43	ENABLE_CSSOM_SMOOTH_SCROLLING = ENABLE_CSSOM_SMOOTH_SCROLLING;
		44
43	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));	45	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));
44	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;	46	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;
45	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;	47	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;
Lines 374-377 ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET; a/Source/WebCore/Configurations/FeatureDefines.xcconfig_sec2
374		376
375	ENABLE_XSLT = ENABLE_XSLT;	377	ENABLE_XSLT = ENABLE_XSLT;
376		378
377	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);	379	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_CSSOM_SMOOTH_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);



    $(WebCore)/page/PerformanceTiming.idl \
    $(WebCore)/page/RemoteDOMWindow.idl \
    $(WebCore)/page/Screen.idl \
    $(WebCore)/page/ScrollBehavior.idl \
    $(WebCore)/page/ScrollIntoViewOptions.idl \
    $(WebCore)/page/ScrollLogicalPosition.idl \
    $(WebCore)/page/ScrollOptions.idl \
    $(WebCore)/page/ScrollToOptions.idl \
    $(WebCore)/page/UserMessageHandler.idl \
    $(WebCore)/page/UserMessageHandlersNamespace.idl \

Lines 40-45 ENABLE_ACCELERATED_2D_CANVAS = ; a/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig_sec1
- a/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig -1 / +3 lines
40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));	40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));
41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;	41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;
42		42
		43	ENABLE_CSSOM_SMOOTH_SCROLLING = ENABLE_CSSOM_SMOOTH_SCROLLING;
		44
43	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));	45	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));
44	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;	46	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;
45	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;	47	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;
Lines 374-377 ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET; a/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig_sec2
374		376
375	ENABLE_XSLT = ENABLE_XSLT;	377	ENABLE_XSLT = ENABLE_XSLT;
376		378
377	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);	379	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_CSSOM_SMOOTH_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);

Lines 3186-3191 JSXPathNSResolver.cpp a/Source/WebCore/Sources.txt_sec1
- a/Source/WebCore/Sources.txt +14 lines
3186	JSXPathResult.cpp	3186	JSXPathResult.cpp
3187	JSXSLTProcessor.cpp	3187	JSXSLTProcessor.cpp
3188		3188
		3189	#if ENABLE_CSSOM_SMOOTH_SCROLLING
		3190
		3191	JSScrollBehavior.cpp
		3192	JSScrollOptions.cpp
		3193	page/ScrollBehavior.cpp
		3194
		3195	#endif
		3196
3189	#if ENABLE_GAMEPAD	3197	#if ENABLE_GAMEPAD
3190		3198
3191	JSGamepad.cpp	3199	JSGamepad.cpp
Lines 3198-3203 Modules/webvr/GamepadWebVR.cpp a/Source/WebCore/Sources.txt_sec2
3198		3206
3199	#endif	3207	#endif
3200		3208
		3209	#if ENABLE_CSSOM_SMOOTH_SCROLLING
		3210
		3211	platform/ScrollAnimationSmooth.cpp
		3212
		3213	#endif
		3214
3201	#if ENABLE_LEGACY_ENCRYPTED_MEDIA	3215	#if ENABLE_LEGACY_ENCRYPTED_MEDIA
3202		3216
3203	JSWebKitMediaKeyMessageEvent.cpp	3217	JSWebKitMediaKeyMessageEvent.cpp



page/scrolling/generic/ScrollingThreadGeneric.cpp

platform/ScrollAnimationKinetic.cpp
#if !ENABLE_CSSOM_SMOOTH_SCROLLING
platform/ScrollAnimationSmooth.cpp
#endif
platform/UserAgentQuirks.cpp

platform/geoclue/GeolocationProviderGeoclue.cpp

Lines 389-394 static const CSSPropertyID computedProperties[] = { a/Source/WebCore/css/CSSComputedStyleDeclaration.cpp_sec1
- a/Source/WebCore/css/CSSComputedStyleDeclaration.cpp +9 lines
389	CSSPropertyOrder,	389	CSSPropertyOrder,
390	#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)	390	#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
391	CSSPropertyWebkitOverflowScrolling,	391	CSSPropertyWebkitOverflowScrolling,
		392	#endif
		393	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		394	CSSPropertyScrollBehavior,
392	#endif	395	#endif
393	CSSPropertyPerspective,	396	CSSPropertyPerspective,
394	CSSPropertyPerspectiveOrigin,	397	CSSPropertyPerspectiveOrigin,
Lines 3681-3686 RefPtr<CSSValue> ComputedStyleExtractor::valueForPropertyinStyle(const RenderSty a/Source/WebCore/css/CSSComputedStyleDeclaration.cpp_sec2
3681	if (!style.useTouchOverflowScrolling())	3684	if (!style.useTouchOverflowScrolling())
3682	return cssValuePool.createIdentifierValue(CSSValueAuto);	3685	return cssValuePool.createIdentifierValue(CSSValueAuto);
3683	return cssValuePool.createIdentifierValue(CSSValueTouch);	3686	return cssValuePool.createIdentifierValue(CSSValueTouch);
		3687	#endif
		3688	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		3689	case CSSPropertyScrollBehavior:
		3690	if (!style.useSmoothScrolling())
		3691	return cssValuePool.createIdentifierValue(CSSValueAuto);
		3692	return cssValuePool.createIdentifierValue(CSSValueSmooth);
3684	#endif	3693	#endif
3685	case CSSPropertyPerspective:	3694	case CSSPropertyPerspective:
3686	if (!style.hasPerspective())	3695	if (!style.hasPerspective())



                "url": "https://www.w3.org/TR/css-ui-4/#propdef-user-select"
            }
        },
        "scroll-behavior": {
            "values": [
                "auto",
                "smooth"
            ],
            "codegen-properties": {
                "converter": "SmoothScrolling",
                "enable-if": "ENABLE_CSSOM_SMOOTH_SCROLLING",
                "name-for-methods": "UseSmoothScrolling"
            },
            "status": {
                "status": "in development"
            },
            "specification": {
                "url": "https://drafts.csswg.org/cssom-view/#propdef-scroll-behavior"
            }
        },
        "scroll-padding": {
            "codegen-properties": {
                "enable-if": "ENABLE_CSS_SCROLL_SNAP",

Lines 1357-1362 scroll-position a/Source/WebCore/css/CSSValueKeywords.in_sec1
- a/Source/WebCore/css/CSSValueKeywords.in +5 lines
1357	manipulation	1357	manipulation
1358	#endif	1358	#endif
1359		1359
		1360	#if defined(ENABLE_CSSOM_SMOOTH_SCROLLING) && ENABLE_CSSOM_SMOOTH_SCROLLING
		1361	// scroll-behavior
		1362	smooth
		1363	#endif
		1364
1360	// hanging-punctuation	1365	// hanging-punctuation
1361	allow-end	1366	allow-end
1362	first	1367	first

Lines 114-119 public: a/Source/WebCore/css/StyleBuilderConverter.h_sec1
- a/Source/WebCore/css/StyleBuilderConverter.h +10 lines
114	#endif	114	#endif
115	#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)	115	#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
116	static bool convertOverflowScrolling(StyleResolver&, const CSSValue&);	116	static bool convertOverflowScrolling(StyleResolver&, const CSSValue&);
		117	#endif
		118	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		119	static bool convertSmoothScrolling(StyleResolver&, const CSSValue&);
117	#endif	120	#endif
118	static FontFeatureSettings convertFontFeatureSettings(StyleResolver&, const CSSValue&);	121	static FontFeatureSettings convertFontFeatureSettings(StyleResolver&, const CSSValue&);
119	static FontSelectionValue convertFontWeightFromValue(const CSSValue&);	122	static FontSelectionValue convertFontWeightFromValue(const CSSValue&);
Lines 1276-1281 inline bool StyleBuilderConverter::convertOverflowScrolling(StyleResolver&, cons a/Source/WebCore/css/StyleBuilderConverter.h_sec2
1276	}	1279	}
1277	#endif	1280	#endif
1278		1281
		1282	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		1283	inline bool StyleBuilderConverter::convertSmoothScrolling(StyleResolver&, const CSSValue& value)
		1284	{
		1285	return downcast<CSSPrimitiveValue>(value).valueID() == CSSValueSmooth;
		1286	}
		1287	#endif
		1288
1279	inline SVGLengthValue StyleBuilderConverter::convertSVGLengthValue(StyleResolver&, const CSSValue& value)	1289	inline SVGLengthValue StyleBuilderConverter::convertSVGLengthValue(StyleResolver&, const CSSValue& value)
1280	{	1290	{
1281	return SVGLengthValue::fromCSSPrimitiveValue(downcast<CSSPrimitiveValue>(value));	1291	return SVGLengthValue::fromCSSPrimitiveValue(downcast<CSSPrimitiveValue>(value));

Lines 621-630 bool CSSParserFastPaths::isValidKeywordPropertyAndValue(CSSPropertyID propertyId a/Source/WebCore/css/parser/CSSParserFastPaths.cpp_sec1
- a/Source/WebCore/css/parser/CSSParserFastPaths.cpp -5 / +7 lines
621	return valueID == CSSValueStatic \|\| valueID == CSSValueRelative \|\| valueID == CSSValueAbsolute \|\| valueID == CSSValueFixed \|\| valueID == CSSValueWebkitSticky;	621	return valueID == CSSValueStatic \|\| valueID == CSSValueRelative \|\| valueID == CSSValueAbsolute \|\| valueID == CSSValueFixed \|\| valueID == CSSValueWebkitSticky;
622	case CSSPropertyResize: // none \| both \| horizontal \| vertical \| auto	622	case CSSPropertyResize: // none \| both \| horizontal \| vertical \| auto
623	return valueID == CSSValueNone \|\| valueID == CSSValueBoth \|\| valueID == CSSValueHorizontal \|\| valueID == CSSValueVertical \|\| valueID == CSSValueAuto;	623	return valueID == CSSValueNone \|\| valueID == CSSValueBoth \|\| valueID == CSSValueHorizontal \|\| valueID == CSSValueVertical \|\| valueID == CSSValueAuto;
624	// FIXME-NEWPARSER: Investigate this property.	624	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
625	// case CSSPropertyScrollBehavior: // auto \| smooth	625	case CSSPropertyScrollBehavior: // auto \| smooth
626	// ASSERT(RuntimeEnabledFeatures::cssomSmoothScrollEnabled());	626	return valueID == CSSValueAuto \|\| valueID == CSSValueSmooth;
627	// return valueID == CSSValueAuto \|\| valueID == CSSValueSmooth;	627	#endif
628	case CSSPropertyShapeRendering:	628	case CSSPropertyShapeRendering:
629	return valueID == CSSValueAuto \|\| valueID == CSSValueOptimizeSpeed \|\| valueID == CSSValueCrispedges \|\| valueID == CSSValueGeometricPrecision;	629	return valueID == CSSValueAuto \|\| valueID == CSSValueOptimizeSpeed \|\| valueID == CSSValueCrispedges \|\| valueID == CSSValueGeometricPrecision;
630	case CSSPropertyStrokeLinejoin:	630	case CSSPropertyStrokeLinejoin:
Lines 925-931 bool CSSParserFastPaths::isKeywordPropertyID(CSSPropertyID propertyId) a/Source/WebCore/css/parser/CSSParserFastPaths.cpp_sec2
925	// case CSSPropertyFontKerning:	925	// case CSSPropertyFontKerning:
926	// case CSSPropertyHyphens:	926	// case CSSPropertyHyphens:
927	// case CSSPropertyOverflowAnchor:	927	// case CSSPropertyOverflowAnchor:
928	// case CSSPropertyScrollBehavior:	928	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		929	case CSSPropertyScrollBehavior:
		930	#endif
929	// case CSSPropertyScrollSnapType:	931	// case CSSPropertyScrollSnapType:
930	// case CSSPropertyTextAlignLast:	932	// case CSSPropertyTextAlignLast:
931	// case CSSPropertyTextCombineUpright:	933	// case CSSPropertyTextCombineUpright:



    bool insideFixed;
    LayoutRect absoluteBounds = renderer()->absoluteAnchorRect(&insideFixed);

    // FIXME(webkit.org/b/188043): Support ScrollBehavior.
    ScrollIntoViewOptions options;
    if (arg) {
        auto value = arg.value();

            options.blockPosition = ScrollLogicalPosition::End;
    }

    ScrollRectToVisibleOptions scrollRectToVisibleOptions {
        SelectionRevealMode::Reveal,
        toScrollAlignment(options.inlinePosition, false),
        toScrollAlignment(options.blockPosition, true),
        ShouldAllowCrossOriginScrolling::No
    };
#if ENABLE(CSSOM_SMOOTH_SCROLLING)
    if (options.behavior)
        scrollRectToVisibleOptions.behavior = options.behavior.value();
#endif
    renderer()->scrollRectToVisible(absoluteBounds, insideFixed, scrollRectToVisibleOptions);
}

void Element::scrollIntoView(bool alignToTop) 


void Element::scrollBy(double x, double y)
{
    scrollBy(fromCoordinates(x, y));
}

void Element::scrollTo(const ScrollToOptions& options, ScrollClamping clamping)

        adjustForAbsoluteZoom(renderer->scrollLeft(), *renderer),
        adjustForAbsoluteZoom(renderer->scrollTop(), *renderer)
    );

    IntPoint scrollPosition(
        clampToInteger(scrollToOptions.left.value() * renderer->style().effectiveZoom()),
        clampToInteger(scrollToOptions.top.value() * renderer->style().effectiveZoom())
    );
#if ENABLE(CSSOM_SMOOTH_SCROLLING)
    if (useSmoothScrolling(scrollToOptions.behavior.value_or(ScrollBehavior::Auto), *this)) {
        renderer->scrollToPositionWithAnimation(scrollPosition, clamping);
        return;
    }
#endif
    renderer->setScrollLeft(scrollPosition.x(), clamping);
    renderer->setScrollTop(scrollPosition.y(), clamping);
}

void Element::scrollTo(double x, double y)
{
    scrollTo(fromCoordinates(x, y));
}

void Element::scrollByUnits(int units, ScrollGranularity granularity)




void DOMWindow::scrollBy(double x, double y) const
{
    return scrollBy(fromCoordinates(x, y));
}

void DOMWindow::scrollBy(const ScrollToOptions& options) const


void DOMWindow::scrollTo(double x, double y, ScrollClamping clamping) const
{
    return scrollTo(fromCoordinates(x, y), clamping);
}

void DOMWindow::scrollTo(const ScrollToOptions& options, ScrollClamping clamping) const
{
    if (!isCurrentlyDisplayedInFrame())
        return;

        view->contentsScrollPosition().x(), view->contentsScrollPosition().y()
    );

    if (!view->isScrollInProgress() && !scrollToOptions.left.value() && !scrollToOptions.top.value() && view->contentsScrollPosition() == IntPoint(0, 0))
        return;

    document()->updateLayoutIgnorePendingStylesheets();

    IntPoint layoutPos(view->mapFromCSSToLayoutUnits(scrollToOptions.left.value()), view->mapFromCSSToLayoutUnits(scrollToOptions.top.value()));
#if ENABLE(CSSOM_SMOOTH_SCROLLING)
    // FIXME: Should we use document()->scrollingElement()?
    // See https://github.com/w3c/csswg-drafts/issues/2977
    if (document()->documentElement() && useSmoothScrolling(scrollToOptions.behavior.value_or(ScrollBehavior::Auto), *document()->documentElement())) {
        view->scrollToOffsetWithAnimation(layoutPos, clamping);
        return;
    }
#else
    ASSERT_UNUSED(clamping);
#endif
    view->setContentsScrollPosition(layoutPos);
}




/*
 * Copyright (C) 2018 Igalia S.L.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "config.h"
#include "ScrollBehavior.h"

#if ENABLE(CSSOM_SMOOTH_SCROLLING)

#include "Element.h"
#include "RenderElement.h"
#include "RenderStyle.h"
#include "Settings.h"

namespace WebCore {

bool useSmoothScrolling(ScrollBehavior behavior, Element& associatedElement)
{
    if (!associatedElement.document().settings().cssomSmoothScrollingEnabled() || !associatedElement.renderer())
        return false;

    // https://drafts.csswg.org/cssom-view/#scrolling
    switch (behavior) {
    case ScrollBehavior::Auto:
        return associatedElement.renderer()->style().useSmoothScrolling();
    case ScrollBehavior::Instant:
        return false;
    case ScrollBehavior::Smooth:
        return true;
    }
    ASSERT_NOT_REACHED();
    return false;
}

} // namespace WebCore

#endif // ENABLE(CSSOM_SMOOTH_SCROLLING)



/*
 * Copyright (C) 2018 Igalia S.L.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#pragma once

#if ENABLE(CSSOM_SMOOTH_SCROLLING)

namespace WebCore {

class Element;

enum class ScrollBehavior : uint8_t {
    Auto = 0,
    Instant,
    Smooth
};

bool useSmoothScrolling(ScrollBehavior, Element& associatedElement);

} // namespace WebCore

#endif // ENABLE(CSSOM_SMOOTH_SCROLLING)



/*
 * Copyright (C) 2018 Igalia S.L.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

enum ScrollBehavior { "auto", "instant", "smooth" };

Lines 21-31 a/Source/WebCore/page/ScrollIntoViewOptions.h_sec1
- a/Source/WebCore/page/ScrollIntoViewOptions.h -2 / +8 lines
21		21
22	#include "ScrollLogicalPosition.h"	22	#include "ScrollLogicalPosition.h"
23		23
24	namespace WebCore {	24	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		25	#include "ScrollOptions.h"
		26	#endif
25		27
26	class Element;	28	namespace WebCore {
27		29
		30	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		31	struct ScrollIntoViewOptions : ScrollOptions {
		32	#else
28	struct ScrollIntoViewOptions {	33	struct ScrollIntoViewOptions {
		34	#endif
29	std::optional<ScrollLogicalPosition> blockPosition { ScrollLogicalPosition::Start };	35	std::optional<ScrollLogicalPosition> blockPosition { ScrollLogicalPosition::Start };
30	std::optional<ScrollLogicalPosition> inlinePosition { ScrollLogicalPosition::Nearest };	36	std::optional<ScrollLogicalPosition> inlinePosition { ScrollLogicalPosition::Nearest };
31	};	37	};

Lines 17-24 a/Source/WebCore/page/ScrollIntoViewOptions.idl_sec1
- a/Source/WebCore/page/ScrollIntoViewOptions.idl -1 / +4 lines
17	* Boston, MA 02110-1301, USA.	17	* Boston, MA 02110-1301, USA.
18	*/	18	*/
19		19
20	// FIXME(webkit.org/b/188043): Support ScrollBehavior.	20	#if defined(ENABLE_CSSOM_SMOOTH_SCROLLING) && ENABLE_CSSOM_SMOOTH_SCROLLING
		21	dictionary ScrollIntoViewOptions : ScrollOptions {
		22	#else
21	dictionary ScrollIntoViewOptions {	23	dictionary ScrollIntoViewOptions {
		24	#endif
22	[ImplementedAs=blockPosition] ScrollLogicalPosition block = "start";	25	[ImplementedAs=blockPosition] ScrollLogicalPosition block = "start";
23	[ImplementedAs=inlinePosition] ScrollLogicalPosition inline = "nearest";	26	[ImplementedAs=inlinePosition] ScrollLogicalPosition inline = "nearest";
24	};	27	};



/*
 * Copyright (C) 2018 Igalia S.L.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#pragma once

#if ENABLE(CSSOM_SMOOTH_SCROLLING)

#include "ScrollBehavior.h"

namespace WebCore {

struct ScrollOptions {
    std::optional<ScrollBehavior> behavior { ScrollBehavior::Auto };
};

} // namespace WebCore

#endif // ENABLE(CSSOM_SMOOTH_SCROLLING)



/*
 * Copyright (C) 2018 Igalia S.L.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

dictionary ScrollOptions {
    ScrollBehavior behavior = "auto";
};

Lines 31-43 a/Source/WebCore/page/ScrollToOptions.h_sec1
- a/Source/WebCore/page/ScrollToOptions.h -1 / +17 lines
31	#include <cmath>	31	#include <cmath>
32	#include <wtf/Optional.h>	32	#include <wtf/Optional.h>
33		33
		34	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		35	#include "ScrollOptions.h"
		36	#endif
		37
34	namespace WebCore {	38	namespace WebCore {
35		39
		40	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		41	struct ScrollToOptions : ScrollOptions {
		42	#else
36	struct ScrollToOptions {	43	struct ScrollToOptions {
		44	#endif
37	std::optional<double> left;	45	std::optional<double> left;
38	std::optional<double> top;	46	std::optional<double> top;
39	};	47	};
40		48
		49	inline ScrollToOptions fromCoordinates(double x, double y)
		50	{
		51	ScrollToOptions options;
		52	options.left = x;
		53	options.top = y;
		54	return options;
		55	};
		56
41	inline double normalizeNonFiniteValueOrFallBackTo(std::optional<double> value, double fallbackValue)	57	inline double normalizeNonFiniteValueOrFallBackTo(std::optional<double> value, double fallbackValue)
42	{	58	{
43	// Normalize non-finite values (https://drafts.csswg.org/cssom-view/#normalize-non-finite-values).	59	// Normalize non-finite values (https://drafts.csswg.org/cssom-view/#normalize-non-finite-values).
Lines 47-53 inline double normalizeNonFiniteValueOrFallBackTo(std::optional<double> value, d a/Source/WebCore/page/ScrollToOptions.h_sec2
47	// FIXME(https://webkit.org/b/88339): Consider using FloatPoint or DoublePoint for fallback and return values.	63	// FIXME(https://webkit.org/b/88339): Consider using FloatPoint or DoublePoint for fallback and return values.
48	inline ScrollToOptions normalizeNonFiniteCoordinatesOrFallBackTo(const ScrollToOptions& value, double x, double y)	64	inline ScrollToOptions normalizeNonFiniteCoordinatesOrFallBackTo(const ScrollToOptions& value, double x, double y)
49	{	65	{
50	ScrollToOptions options;	66	ScrollToOptions options = value;
51	options.left = normalizeNonFiniteValueOrFallBackTo(value.left, x);	67	options.left = normalizeNonFiniteValueOrFallBackTo(value.left, x);
52	options.top = normalizeNonFiniteValueOrFallBackTo(value.top, y);	68	options.top = normalizeNonFiniteValueOrFallBackTo(value.top, y);
53	return options;	69	return options;

Lines 26-33 a/Source/WebCore/page/ScrollToOptions.idl_sec1
- a/Source/WebCore/page/ScrollToOptions.idl -1 / +4 lines
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	// FIXME(webkit.org/b/188043): Support ScrollBehavior.	29	#if defined(ENABLE_CSSOM_SMOOTH_SCROLLING) && ENABLE_CSSOM_SMOOTH_SCROLLING
		30	dictionary ScrollToOptions : ScrollOptions {
		31	#else
30	dictionary ScrollToOptions {	32	dictionary ScrollToOptions {
		33	#endif
31	unrestricted double left;	34	unrestricted double left;
32	unrestricted double top;	35	unrestricted double top;
33	};	36	};

Lines 364-369 frameFlattening: a/Source/WebCore/page/Settings.yaml_sec1
- a/Source/WebCore/page/Settings.yaml +3 lines
364	asyncFrameScrollingEnabled:	364	asyncFrameScrollingEnabled:
365	initial: false	365	initial: false
366	onChange: setNeedsRelayoutAllFrames	366	onChange: setNeedsRelayoutAllFrames
		367	cssomSmoothScrollingEnabled:
		368	type: bool
		369	initial: false
367		370
368	webSecurityEnabled:	371	webSecurityEnabled:
369	initial: true	372	initial: true




class FloatPoint;
class ScrollableArea;
enum class ScrollClamping;

class ScrollAnimation {
public:
    virtual ~ScrollAnimation() { };
    virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float /* step */, float /* multiplier */) { return true; };
    virtual void scroll(const FloatPoint&, ScrollClamping) { };
    virtual void stop() = 0;
    virtual void updateVisibleLengths() { };
    virtual void setCurrentPosition(const FloatPoint&) { };
    virtual void serviceAnimation() { };
    virtual bool isScrollInProgress() const { return false; }

protected:
    ScrollAnimation(ScrollableArea& scrollableArea)

Lines 163-166 void ScrollAnimationKinetic::animationTimerFired() a/Source/WebCore/platform/ScrollAnimationKinetic.cpp_sec1
- a/Source/WebCore/platform/ScrollAnimationKinetic.cpp +5 lines
163	m_notifyPositionChangedFunction(FloatPoint(m_position));	163	m_notifyPositionChangedFunction(FloatPoint(m_position));
164	}	164	}
165		165
		166	bool ScrollAnimationKinetic::isScrollInProgress() const
		167	{
		168	return m_animationTimer.isActive();
		169	}
		170
166	} // namespace WebCore	171	} // namespace WebCore

Lines 66-71 public: a/Source/WebCore/platform/ScrollAnimationKinetic.h_sec1
- a/Source/WebCore/platform/ScrollAnimationKinetic.h +1 lines
66	private:	66	private:
67	void stop() override;	67	void stop() override;
68	void animationTimerFired();	68	void animationTimerFired();
		69	bool isScrollInProgress() const override;
69		70
70	std::function<void(FloatPoint&&)> m_notifyPositionChangedFunction;	71	std::function<void(FloatPoint&&)> m_notifyPositionChangedFunction;
71		72



#include "config.h"
#include "ScrollAnimationSmooth.h"

#if ENABLE(SMOOTH_SCROLLING) || ENABLE(CSSOM_SMOOTH_SCROLLING)

#include "FloatPoint.h"
#include "ScrollableArea.h"

static const double frameRate = 60;
static const Seconds tickTime = 1_s / frameRate;
static const Seconds minimumTimerInterval { 1_ms };
static const double smoothFactorForProgrammaticScroll = 5;

ScrollAnimationSmooth::ScrollAnimationSmooth(ScrollableArea& scrollableArea, const FloatPoint& position, WTF::Function<void (FloatPoint&&)>&& notifyPositionChangedFunction)
    : ScrollAnimation(scrollableArea)

    return needToScroll;
}

void ScrollAnimationSmooth::scroll(const FloatPoint& position, ScrollClamping)
{
    // FIXME: Consider clamping?
    ScrollGranularity granularity = ScrollByPage;
    bool needToScroll = updatePerAxisData(m_horizontalData, granularity, position.x() - m_horizontalData.currentPosition, m_scrollableArea.minimumScrollPosition().x(), m_scrollableArea.maximumScrollPosition().x(), smoothFactorForProgrammaticScroll);
    needToScroll |=
        updatePerAxisData(m_verticalData, granularity, position.y() - m_verticalData.currentPosition, m_scrollableArea.minimumScrollPosition().y(), m_scrollableArea.maximumScrollPosition().y(), smoothFactorForProgrammaticScroll);
    if (needToScroll && !animationTimerActive()) {
        m_startTime = m_horizontalData.startTime;
        animationTimerFired();
    }
};

void ScrollAnimationSmooth::stop()
{
    m_animationTimer.stop();

    }
}

bool ScrollAnimationSmooth::updatePerAxisData(PerAxisData& data, ScrollGranularity granularity, float delta, float minScrollPosition, float maxScrollPosition, double smoothFactor)
{
    if (!data.startTime || !delta || (delta < 0) != (data.desiredPosition - data.currentPosition < 0)) {
        data.desiredPosition = data.currentPosition;

    Curve coastTimeCurve;
    getAnimationParametersForGranularity(granularity, animationTime, repeatMinimumSustainTime, attackTime, releaseTime, coastTimeCurve, maximumCoastTime);

    animationTime *= smoothFactor;
    repeatMinimumSustainTime *= smoothFactor;
    attackTime *= smoothFactor;
    releaseTime *= smoothFactor;
    maximumCoastTime *= smoothFactor;

    data.desiredPosition = newPosition;
    if (!data.startTime)
        data.attackTime = attackTime;


} // namespace WebCore

#endif // ENABLE(SMOOTH_SCROLLING) || ENABLE(CSSOM_SMOOTH_SCROLLING)




#include "ScrollAnimation.h"

#if ENABLE(SMOOTH_SCROLLING) || ENABLE(CSSOM_SMOOTH_SCROLLING)

#include "Timer.h"



class FloatPoint;
class ScrollableArea;
enum class ScrollClamping;

class ScrollAnimationSmooth final: public ScrollAnimation {
public:


private:
    bool scroll(ScrollbarOrientation, ScrollGranularity, float step, float multiplier) override;
    void scroll(const FloatPoint&, ScrollClamping) override;
    void stop() override;
    void updateVisibleLengths() override;
    void setCurrentPosition(const FloatPoint&) override;
    bool isScrollInProgress() const override { return animationTimerActive(); }

    struct PerAxisData {
        PerAxisData() = delete;

        int visibleLength { 0 };
    };

    bool updatePerAxisData(PerAxisData&, ScrollGranularity, float delta, float minScrollPosition, float maxScrollPosition, double smoothFactor = 1);
    bool animateScroll(PerAxisData&, MonotonicTime currentTime);

    void requestAnimationTimerFired();


} // namespace WebCore

#endif // ENABLE(SMOOTH_SCROLLING) || ENABLE(CSSOM_SMOOTH_SCROLLING)

Lines 38-43 a/Source/WebCore/platform/ScrollAnimator.cpp_sec1
- a/Source/WebCore/platform/ScrollAnimator.cpp +61 lines
38	#include "ScrollableArea.h"	38	#include "ScrollableArea.h"
39	#include <algorithm>	39	#include <algorithm>
40		40
		41	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		42	#include "ScrollAnimationSmooth.h"
		43	#endif
		44
41	namespace WebCore {	45	namespace WebCore {
42		46
43	#if !ENABLE(SMOOTH_SCROLLING) && !PLATFORM(IOS) && !PLATFORM(MAC)	47	#if !ENABLE(SMOOTH_SCROLLING) && !PLATFORM(IOS) && !PLATFORM(MAC)
Lines 52-62 ScrollAnimator::ScrollAnimator(ScrollableArea& scrollableArea) a/Source/WebCore/platform/ScrollAnimator.cpp_sec2
52	#if ENABLE(CSS_SCROLL_SNAP) \|\| ENABLE(RUBBER_BANDING)	56	#if ENABLE(CSS_SCROLL_SNAP) \|\| ENABLE(RUBBER_BANDING)
53	, m_scrollController(*this)	57	, m_scrollController(*this)
54	#endif	58	#endif
		59	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		60	, m_animationProgrammaticScroll(std::make_unique<ScrollAnimationSmooth>(scrollableArea, m_currentPosition, [this](FloatPoint&& position) {
		61	FloatSize delta = position - m_currentPosition;
		62	m_currentPosition = WTFMove(position);
		63	notifyPositionChanged(delta);
		64	}))
		65	#endif
55	{	66	{
56	}	67	}
57		68
58	ScrollAnimator::~ScrollAnimator() = default;	69	ScrollAnimator::~ScrollAnimator() = default;
59		70
		71	bool ScrollAnimator::isScrollInProgress() const
		72	{
		73	// FIXME (TODO): This should also take into account animations in derived classes.
		74	return m_animationProgrammaticScroll->isScrollInProgress();
		75	}
		76
60	bool ScrollAnimator::scroll(ScrollbarOrientation orientation, ScrollGranularity, float step, float multiplier)	77	bool ScrollAnimator::scroll(ScrollbarOrientation orientation, ScrollGranularity, float step, float multiplier)
61	{	78	{
62	FloatPoint currentPosition = this->currentPosition();	79	FloatPoint currentPosition = this->currentPosition();
Lines 75-80 bool ScrollAnimator::scroll(ScrollbarOrientation orientation, ScrollGranularity, a/Source/WebCore/platform/ScrollAnimator.cpp_sec3
75	return true;	92	return true;
76	}	93	}
77		94
		95	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		96	void ScrollAnimator::scrollToOffset(const FloatPoint& offset, ScrollClamping clamping)
		97	{
		98	m_animationProgrammaticScroll->setCurrentPosition(m_currentPosition);
		99	auto newPosition = ScrollableArea::scrollPositionFromOffset(offset, toFloatSize(m_scrollableArea.scrollOrigin()));
		100	m_animationProgrammaticScroll->scroll(newPosition, clamping);
		101	}
		102	#endif
		103
78	void ScrollAnimator::scrollToOffsetWithoutAnimation(const FloatPoint& offset, ScrollClamping)	104	void ScrollAnimator::scrollToOffsetWithoutAnimation(const FloatPoint& offset, ScrollClamping)
79	{	105	{
80	FloatPoint newPositon = ScrollableArea::scrollPositionFromOffset(offset, toFloatSize(m_scrollableArea.scrollOrigin()));	106	FloatPoint newPositon = ScrollableArea::scrollPositionFromOffset(offset, toFloatSize(m_scrollableArea.scrollOrigin()));
Lines 245-248 void ScrollAnimator::removeTestDeferralForReason(WheelEventTestTrigger::Scrollab a/Source/WebCore/platform/ScrollAnimator.cpp_sec4
245	}	271	}
246	#endif	272	#endif
247		273
		274	void ScrollAnimator::cancelAnimations()
		275	{
		276	#if ENABLE(CSSOM_SMOOTH_SCROLLING) && !USE(REQUEST_ANIMATION_FRAME_TIMER)
		277	m_animationProgrammaticScroll->stop();
		278	#endif
		279	}
		280
		281	void ScrollAnimator::serviceScrollAnimations()
		282	{
		283	#if ENABLE(CSSOM_SMOOTH_SCROLLING) && !USE(REQUEST_ANIMATION_FRAME_TIMER)
		284	m_animationProgrammaticScroll->serviceAnimation();
		285	#endif
		286	}
		287
		288	void ScrollAnimator::willEndLiveResize()
		289	{
		290	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		291	m_animationProgrammaticScroll->updateVisibleLengths();
		292	#endif
		293	}
		294
		295	void ScrollAnimator::didAddVerticalScrollbar(Scrollbar*)
		296	{
		297	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		298	m_animationProgrammaticScroll->updateVisibleLengths();
		299	#endif
		300	}
		301
		302	void ScrollAnimator::didAddHorizontalScrollbar(Scrollbar*)
		303	{
		304	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		305	m_animationProgrammaticScroll->updateVisibleLengths();
		306	#endif
		307	}
		308
248	} // namespace WebCore	309	} // namespace WebCore

Lines 50-55 class ScrollableArea; a/Source/WebCore/platform/ScrollAnimator.h_sec1
- a/Source/WebCore/platform/ScrollAnimator.h -5 / +17 lines
50	class Scrollbar;	50	class Scrollbar;
51	class WheelEventTestTrigger;	51	class WheelEventTestTrigger;
52		52
		53	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		54	class ScrollAnimation;
		55	#endif
		56
53	#if ENABLE(CSS_SCROLL_SNAP) \|\| ENABLE(RUBBER_BANDING)	57	#if ENABLE(CSS_SCROLL_SNAP) \|\| ENABLE(RUBBER_BANDING)
54	class ScrollAnimator : private ScrollControllerClient {	58	class ScrollAnimator : private ScrollControllerClient {
55	#else	59	#else
Lines 68-73 public: a/Source/WebCore/platform/ScrollAnimator.h_sec2
68	// The base class implementation always scrolls immediately, never animates.	72	// The base class implementation always scrolls immediately, never animates.
69	virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float step, float multiplier);	73	virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float step, float multiplier);
70		74
		75	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		76	void scrollToOffset(const FloatPoint&, ScrollClamping = ScrollClamping::Clamped);
		77	#endif
71	virtual void scrollToOffsetWithoutAnimation(const FloatPoint&, ScrollClamping = ScrollClamping::Clamped);	78	virtual void scrollToOffsetWithoutAnimation(const FloatPoint&, ScrollClamping = ScrollClamping::Clamped);
72		79
73	ScrollableArea& scrollableArea() const { return m_scrollableArea; }	80	ScrollableArea& scrollableArea() const { return m_scrollableArea; }
Lines 85-92 public: a/Source/WebCore/platform/ScrollAnimator.h_sec3
85	void setCurrentPosition(const FloatPoint&);	92	void setCurrentPosition(const FloatPoint&);
86	const FloatPoint& currentPosition() const { return m_currentPosition; }	93	const FloatPoint& currentPosition() const { return m_currentPosition; }
87		94
88	virtual void cancelAnimations() { }	95	virtual void cancelAnimations();
89	virtual void serviceScrollAnimations() { }	96	virtual void serviceScrollAnimations();
90		97
91	virtual void contentAreaWillPaint() const { }	98	virtual void contentAreaWillPaint() const { }
92	virtual void mouseEnteredContentArea() { }	99	virtual void mouseEnteredContentArea() { }
Lines 97-112 public: a/Source/WebCore/platform/ScrollAnimator.h_sec4
97	virtual void mouseIsDownInScrollbar(Scrollbar*, bool) const { }	104	virtual void mouseIsDownInScrollbar(Scrollbar*, bool) const { }
98	virtual void willStartLiveResize() { }	105	virtual void willStartLiveResize() { }
99	virtual void contentsResized() const { }	106	virtual void contentsResized() const { }
100	virtual void willEndLiveResize() { }	107	virtual void willEndLiveResize();
101	virtual void contentAreaDidShow() { }	108	virtual void contentAreaDidShow() { }
102	virtual void contentAreaDidHide() { }	109	virtual void contentAreaDidHide() { }
103		110
104	virtual void lockOverlayScrollbarStateToHidden(bool) { }	111	virtual void lockOverlayScrollbarStateToHidden(bool) { }
105	virtual bool scrollbarsCanBeActive() const { return true; }	112	virtual bool scrollbarsCanBeActive() const { return true; }
106		113
107	virtual void didAddVerticalScrollbar(Scrollbar*) { }	114	virtual void didAddVerticalScrollbar(Scrollbar*);
108	virtual void willRemoveVerticalScrollbar(Scrollbar*) { }	115	virtual void willRemoveVerticalScrollbar(Scrollbar*) { }
109	virtual void didAddHorizontalScrollbar(Scrollbar*) { }	116	virtual void didAddHorizontalScrollbar(Scrollbar*);
110	virtual void willRemoveHorizontalScrollbar(Scrollbar*) { }	117	virtual void willRemoveHorizontalScrollbar(Scrollbar*) { }
111		118
112	virtual void invalidateScrollbarPartLayers(Scrollbar*) { }	119	virtual void invalidateScrollbarPartLayers(Scrollbar*) { }
Lines 120-125 public: a/Source/WebCore/platform/ScrollAnimator.h_sec5
120		127
121	virtual bool isRubberBandInProgress() const { return false; }	128	virtual bool isRubberBandInProgress() const { return false; }
122	virtual bool isScrollSnapInProgress() const { return false; }	129	virtual bool isScrollSnapInProgress() const { return false; }
		130	bool isScrollInProgress() const;
123		131
124	void setWheelEventTestTrigger(RefPtr<WheelEventTestTrigger>&& testTrigger) { m_wheelEventTestTrigger = testTrigger; }	132	void setWheelEventTestTrigger(RefPtr<WheelEventTestTrigger>&& testTrigger) { m_wheelEventTestTrigger = testTrigger; }
125	#if (ENABLE(CSS_SCROLL_SNAP) \|\| ENABLE(RUBBER_BANDING)) && PLATFORM(MAC)	133	#if (ENABLE(CSS_SCROLL_SNAP) \|\| ENABLE(RUBBER_BANDING)) && PLATFORM(MAC)
Lines 150-155 protected: a/Source/WebCore/platform/ScrollAnimator.h_sec6
150	ScrollController m_scrollController;	158	ScrollController m_scrollController;
151	#endif	159	#endif
152	FloatPoint m_currentPosition;	160	FloatPoint m_currentPosition;
		161
		162	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		163	std::unique_ptr<ScrollAnimation> m_animationProgrammaticScroll;
		164	#endif
153	};	165	};
154		166
155	} // namespace WebCore	167	} // namespace WebCore



    if (!m_scrollableArea.scrollAnimatorEnabled())
        return ScrollAnimator::scroll(orientation, granularity, step, multiplier);

    m_animation->setCurrentPosition(m_currentPosition);
    return m_animation->scroll(orientation, granularity, step, multiplier);
}


#if !USE(REQUEST_ANIMATION_FRAME_TIMER)
void ScrollAnimatorSmooth::cancelAnimations()
{
    ScrollAnimator::cancelAnimations();
    m_animation->stop();
}

void ScrollAnimatorSmooth::serviceScrollAnimations()
{
    ScrollAnimator::serviceScrollAnimations();
    m_animation->serviceAnimation();
}
#endif

void ScrollAnimatorSmooth::willEndLiveResize()
{
    ScrollAnimator::willEndLiveResize();
    m_animation->updateVisibleLengths();
}

void ScrollAnimatorSmooth::didAddVerticalScrollbar(Scrollbar* scrollbar)
{
    ScrollAnimator::didAddVerticalScrollbar(scrollbar);
    m_animation->updateVisibleLengths();
}

void ScrollAnimatorSmooth::didAddHorizontalScrollbar(Scrollbar* scrollbar)
{
    ScrollAnimator::didAddHorizontalScrollbar(scrollbar);
    m_animation->updateVisibleLengths();
}


Lines 501-509 void ScrollView::setScrollPosition(const ScrollPosition& scrollPosition) a/Source/WebCore/platform/ScrollView.cpp_sec1
- a/Source/WebCore/platform/ScrollView.cpp -1 / +5 lines
501		501
502	ScrollPosition newScrollPosition = !delegatesScrolling() ? adjustScrollPositionWithinRange(scrollPosition) : scrollPosition;	502	ScrollPosition newScrollPosition = !delegatesScrolling() ? adjustScrollPositionWithinRange(scrollPosition) : scrollPosition;
503		503
504	if ((!delegatesScrolling() \|\| !inProgrammaticScroll()) && newScrollPosition == this->scrollPosition())	504	bool scrollInProgress = isScrollInProgress();
		505	if ((!delegatesScrolling() \|\| !inProgrammaticScroll()) && !scrollInProgress && newScrollPosition == this->scrollPosition())
505	return;	506	return;
506		507
		508	if (scrollInProgress)
		509	scrollAnimator().cancelAnimations();
		510
507	if (requestScrollPositionUpdate(newScrollPosition))	511	if (requestScrollPositionUpdate(newScrollPosition))
508	return;	512	return;
509		513

Lines 100-105 float ScrollableArea::adjustScrollStepForFixedContent(float step, ScrollbarOrien a/Source/WebCore/platform/ScrollableArea.cpp_sec1
- a/Source/WebCore/platform/ScrollableArea.cpp +13 lines
100	return step;	100	return step;
101	}	101	}
102		102
		103	bool ScrollableArea::isScrollInProgress() const
		104	{
		105	return m_scrollAnimator && scrollAnimator().isScrollInProgress();
		106	}
		107
103	bool ScrollableArea::scroll(ScrollDirection direction, ScrollGranularity granularity, float multiplier)	108	bool ScrollableArea::scroll(ScrollDirection direction, ScrollGranularity granularity, float multiplier)
104	{	109	{
105	ScrollbarOrientation orientation;	110	ScrollbarOrientation orientation;
Lines 138-143 bool ScrollableArea::scroll(ScrollDirection direction, ScrollGranularity granula a/Source/WebCore/platform/ScrollableArea.cpp_sec2
138	return scrollAnimator().scroll(orientation, granularity, step, multiplier);	143	return scrollAnimator().scroll(orientation, granularity, step, multiplier);
139	}	144	}
140		145
		146	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		147	void ScrollableArea::scrollToOffsetWithAnimation(const FloatPoint& offset, ScrollClamping clamping)
		148	{
		149	LOG_WITH_STREAM(Scrolling, stream << "ScrollableArea " << this << " scrollToOffset " << offset);
		150	scrollAnimator().scrollToOffset(offset, clamping);
		151	}
		152	#endif
		153
141	void ScrollableArea::scrollToOffsetWithoutAnimation(const FloatPoint& offset, ScrollClamping clamping)	154	void ScrollableArea::scrollToOffsetWithoutAnimation(const FloatPoint& offset, ScrollClamping clamping)
142	{	155	{
143	LOG_WITH_STREAM(Scrolling, stream << "ScrollableArea " << this << " scrollToOffsetWithoutAnimation " << offset);	156	LOG_WITH_STREAM(Scrolling, stream << "ScrollableArea " << this << " scrollToOffsetWithoutAnimation " << offset);

Lines 50-56 typedef IntPoint ScrollOffset; a/Source/WebCore/platform/ScrollableArea.h_sec1
- a/Source/WebCore/platform/ScrollableArea.h +4 lines
50		50
51	class ScrollableArea : public CanMakeWeakPtr<ScrollableArea> {	51	class ScrollableArea : public CanMakeWeakPtr<ScrollableArea> {
52	public:	52	public:
		53	WEBCORE_EXPORT bool isScrollInProgress() const;
53	WEBCORE_EXPORT bool scroll(ScrollDirection, ScrollGranularity, float multiplier = 1);	54	WEBCORE_EXPORT bool scroll(ScrollDirection, ScrollGranularity, float multiplier = 1);
		55	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		56	WEBCORE_EXPORT void scrollToOffsetWithAnimation(const FloatPoint&, ScrollClamping = ScrollClamping::Clamped);
		57	#endif
54	WEBCORE_EXPORT void scrollToOffsetWithoutAnimation(const FloatPoint&, ScrollClamping = ScrollClamping::Clamped);	58	WEBCORE_EXPORT void scrollToOffsetWithoutAnimation(const FloatPoint&, ScrollClamping = ScrollClamping::Clamped);
55	void scrollToOffsetWithoutAnimation(ScrollbarOrientation, float offset);	59	void scrollToOffsetWithoutAnimation(ScrollbarOrientation, float offset);
56		60



    layer()->scrollToYPosition(newTop, clamping);
}

#if ENABLE(CSSOM_SMOOTH_SCROLLING)
void RenderBox::scrollToPositionWithAnimation(ScrollPosition scrollPosition, ScrollClamping clamping)
{
    if (!hasOverflowClip() || !layer())
        return;
    setupWheelEventTestTrigger(*layer());
    layer()->scrollToOffsetWithAnimation(scrollPosition, clamping);
}
#endif

void RenderBox::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const
{
    rects.append(snappedIntRect(accumulatedOffset, size()));

Lines 245-250 public: a/Source/WebCore/rendering/RenderBox.h_sec1
- a/Source/WebCore/rendering/RenderBox.h +3 lines
245	virtual int scrollHeight() const;	245	virtual int scrollHeight() const;
246	virtual void setScrollLeft(int, ScrollClamping = ScrollClamping::Clamped);	246	virtual void setScrollLeft(int, ScrollClamping = ScrollClamping::Clamped);
247	virtual void setScrollTop(int, ScrollClamping = ScrollClamping::Clamped);	247	virtual void setScrollTop(int, ScrollClamping = ScrollClamping::Clamped);
		248	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		249	void scrollToPositionWithAnimation(ScrollPosition, ScrollClamping = ScrollClamping::Clamped);
		250	#endif
248		251
249	LayoutUnit marginTop() const override { return m_marginBox.top(); }	252	LayoutUnit marginTop() const override { return m_marginBox.top(); }
250	LayoutUnit marginBottom() const override { return m_marginBox.bottom(); }	253	LayoutUnit marginBottom() const override { return m_marginBox.bottom(); }

Lines 131-136 a/Source/WebCore/rendering/RenderLayer.cpp_sec1
- a/Source/WebCore/rendering/RenderLayer.cpp -5 / +46 lines
131	#include <wtf/text/CString.h>	131	#include <wtf/text/CString.h>
132	#include <wtf/text/TextStream.h>	132	#include <wtf/text/TextStream.h>
133		133
		134	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		135	#include "ScrollBehavior.h"
		136	#endif
		137
134	#if ENABLE(CSS_SCROLL_SNAP)	138	#if ENABLE(CSS_SCROLL_SNAP)
135	#include "AxisScrollSnapOffsets.h"	139	#include "AxisScrollSnapOffsets.h"
136	#endif	140	#endif
Lines 2361-2370 ScrollOffset RenderLayer::clampScrollOffset(const ScrollOffset& scrollOffset) co a/Source/WebCore/rendering/RenderLayer.cpp_sec2
2361	void RenderLayer::scrollToOffset(const ScrollOffset& scrollOffset, ScrollClamping clamping)	2365	void RenderLayer::scrollToOffset(const ScrollOffset& scrollOffset, ScrollClamping clamping)
2362	{	2366	{
2363	ScrollOffset newScrollOffset = clamping == ScrollClamping::Clamped ? clampScrollOffset(scrollOffset) : scrollOffset;	2367	ScrollOffset newScrollOffset = clamping == ScrollClamping::Clamped ? clampScrollOffset(scrollOffset) : scrollOffset;
2364	if (newScrollOffset != this->scrollOffset())	2368	bool scrollInProgress = isScrollInProgress();
		2369	if (scrollInProgress)
		2370	scrollAnimator().cancelAnimations();
		2371	if (scrollInProgress \|\| newScrollOffset != this->scrollOffset())
2365	scrollToOffsetWithoutAnimation(newScrollOffset, clamping);	2372	scrollToOffsetWithoutAnimation(newScrollOffset, clamping);
2366	}	2373	}
2367		2374
		2375	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		2376	void RenderLayer::scrollToOffsetWithAnimation(const ScrollOffset& scrollOffset, ScrollClamping clamping)
		2377	{
		2378	ScrollOffset newScrollOffset = clamping == ScrollClamping::Clamped ? clampScrollOffset(scrollOffset) : scrollOffset;
		2379	bool scrollInProgress = isScrollInProgress();
		2380	if (scrollInProgress)
		2381	scrollAnimator().cancelAnimations();
		2382	if (scrollInProgress \|\| newScrollOffset != this->scrollOffset())
		2383	ScrollableArea::scrollToOffsetWithAnimation(newScrollOffset, clamping);
		2384	}
		2385	#endif
		2386
2368	void RenderLayer::scrollTo(const ScrollPosition& position)	2387	void RenderLayer::scrollTo(const ScrollPosition& position)
2369	{	2388	{
2370	RenderBox* box = renderBox();	2389	RenderBox* box = renderBox();
Lines 2504-2509 bool RenderLayer::allowsCurrentScroll() const a/Source/WebCore/rendering/RenderLayer.cpp_sec3
2504		2523
2505	void RenderLayer::scrollRectToVisible(const LayoutRect& absoluteRect, bool insideFixed, const ScrollRectToVisibleOptions& options)	2524	void RenderLayer::scrollRectToVisible(const LayoutRect& absoluteRect, bool insideFixed, const ScrollRectToVisibleOptions& options)
2506	{	2525	{
		2526	// FIXME (TODO): Make this work for nested scrollable boxes when a smooth scrolling must be performed.
		2527	// See https://github.com/w3c/csswg-drafts/issues/3127 for proposed algorithms.
2507	LOG_WITH_STREAM(Scrolling, stream << "Layer " << this << " scrollRectToVisible " << absoluteRect);	2528	LOG_WITH_STREAM(Scrolling, stream << "Layer " << this << " scrollRectToVisible " << absoluteRect);
2508		2529
2509	RenderLayer* parentLayer = nullptr;	2530	RenderLayer* parentLayer = nullptr;
Lines 2526-2534 void RenderLayer::scrollRectToVisible(const LayoutRect& absoluteRect, bool insid a/Source/WebCore/rendering/RenderLayer.cpp_sec4
2526	LayoutRect revealRect = getRectToExpose(layerBounds, localExposeRect, insideFixed, options.alignX, options.alignY);	2547	LayoutRect revealRect = getRectToExpose(layerBounds, localExposeRect, insideFixed, options.alignX, options.alignY);
2527		2548
2528	ScrollOffset clampedScrollOffset = clampScrollOffset(scrollOffset() + toIntSize(roundedIntRect(revealRect).location()));	2549	ScrollOffset clampedScrollOffset = clampScrollOffset(scrollOffset() + toIntSize(roundedIntRect(revealRect).location()));
2529	if (clampedScrollOffset != scrollOffset()) {	2550	if (isScrollInProgress() \|\| clampedScrollOffset != scrollOffset()) {
2530	ScrollOffset oldScrollOffset = scrollOffset();	2551	ScrollOffset oldScrollOffset = scrollOffset();
2531	scrollToOffset(clampedScrollOffset);	2552	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		2553	if (box->element() && useSmoothScrolling(options.behavior, *box->element()))
		2554	scrollToOffsetWithAnimation(clampedScrollOffset);
		2555	else
		2556	#endif
		2557	scrollToOffset(clampedScrollOffset);
2532	IntSize scrollOffsetDifference = scrollOffset() - oldScrollOffset;	2558	IntSize scrollOffsetDifference = scrollOffset() - oldScrollOffset;
2533	localExposeRect.move(-scrollOffsetDifference);	2559	localExposeRect.move(-scrollOffsetDifference);
2534	newRect = LayoutRect(box->localToAbsoluteQuad(FloatQuad(FloatRect(localExposeRect)), UseTransforms).boundingBox());	2560	newRect = LayoutRect(box->localToAbsoluteQuad(FloatQuad(FloatRect(localExposeRect)), UseTransforms).boundingBox());
Lines 2552-2558 void RenderLayer::scrollRectToVisible(const LayoutRect& absoluteRect, bool insid a/Source/WebCore/rendering/RenderLayer.cpp_sec5
2552	IntPoint scrollOffset(roundedIntPoint(exposeRect.location()));	2578	IntPoint scrollOffset(roundedIntPoint(exposeRect.location()));
2553	// Adjust offsets if they're outside of the allowable range.	2579	// Adjust offsets if they're outside of the allowable range.
2554	scrollOffset = scrollOffset.constrainedBetween(IntPoint(), IntPoint(frameView.contentsSize()));	2580	scrollOffset = scrollOffset.constrainedBetween(IntPoint(), IntPoint(frameView.contentsSize()));
2555	frameView.setScrollPosition(scrollOffset);	2581	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		2582	// FIXME: Should we use contentDocument()->scrollingElement()?
		2583	// See https://github.com/w3c/csswg-drafts/issues/2977
		2584	if (ownerElement->contentDocument() && ownerElement->contentDocument()->documentElement() && useSmoothScrolling(options.behavior, *ownerElement->contentDocument()->documentElement()))
		2585	frameView.scrollToOffsetWithAnimation(scrollOffset);
		2586	else
		2587	#endif
		2588	frameView.setScrollPosition(scrollOffset);
2556		2589
2557	if (options.shouldAllowCrossOriginScrolling == ShouldAllowCrossOriginScrolling::Yes \|\| frameView.safeToPropagateScrollToParent()) {	2590	if (options.shouldAllowCrossOriginScrolling == ShouldAllowCrossOriginScrolling::Yes \|\| frameView.safeToPropagateScrollToParent()) {
2558	parentLayer = ownerElement->renderer()->enclosingLayer();	2591	parentLayer = ownerElement->renderer()->enclosingLayer();
Lines 2577-2583 void RenderLayer::scrollRectToVisible(const LayoutRect& absoluteRect, bool insid a/Source/WebCore/rendering/RenderLayer.cpp_sec6
2577		2610
2578	LayoutRect revealRect = getRectToExpose(viewRect, targetRect, insideFixed, options.alignX, options.alignY);	2611	LayoutRect revealRect = getRectToExpose(viewRect, targetRect, insideFixed, options.alignX, options.alignY);
2579		2612
2580	frameView.setScrollPosition(roundedIntPoint(revealRect.location()));	2613	IntPoint scrollOffset(roundedIntPoint(revealRect.location()));
		2614	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		2615	// FIXME: Should we use document()->scrollingElement()?
		2616	// See https://github.com/w3c/csswg-drafts/issues/2977
		2617	if (renderer().document().documentElement() && useSmoothScrolling(options.behavior, *renderer().document().documentElement()))
		2618	frameView.scrollToOffsetWithAnimation(scrollOffset);
		2619	else
		2620	#endif
		2621	frameView.setScrollPosition(scrollOffset);
2581		2622
2582	// This is the outermost view of a web page, so after scrolling this view we	2623	// This is the outermost view of a web page, so after scrolling this view we
2583	// scroll its container by calling Page::scrollRectIntoView.	2624	// scroll its container by calling Page::scrollRectIntoView.

Lines 54-59 a/Source/WebCore/rendering/RenderLayer.h_sec1
- a/Source/WebCore/rendering/RenderLayer.h +10 lines
54	#include <memory>	54	#include <memory>
55	#include <wtf/WeakPtr.h>	55	#include <wtf/WeakPtr.h>
56		56
		57	#if ENABLE(CSSOM_SCROLL_BEHAVIOR)
		58	#include "ScrollBehavior.h"
		59	#endif
		60
57	namespace WTF {	61	namespace WTF {
58	class TextStream;	62	class TextStream;
59	}	63	}
Lines 125-130 struct ScrollRectToVisibleOptions { a/Source/WebCore/rendering/RenderLayer.h_sec2
125	const ScrollAlignment& alignX { ScrollAlignment::alignCenterIfNeeded };	129	const ScrollAlignment& alignX { ScrollAlignment::alignCenterIfNeeded };
126	const ScrollAlignment& alignY { ScrollAlignment::alignCenterIfNeeded };	130	const ScrollAlignment& alignY { ScrollAlignment::alignCenterIfNeeded };
127	ShouldAllowCrossOriginScrolling shouldAllowCrossOriginScrolling { ShouldAllowCrossOriginScrolling::No };	131	ShouldAllowCrossOriginScrolling shouldAllowCrossOriginScrolling { ShouldAllowCrossOriginScrolling::No };
		132	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		133	ScrollBehavior behavior { ScrollBehavior::Auto };
		134	#endif
128	};	135	};
129		136
130	class RenderLayer final : public ScrollableArea {	137	class RenderLayer final : public ScrollableArea {
Lines 210-215 public: a/Source/WebCore/rendering/RenderLayer.h_sec3
210	void scrollByRecursively(const IntSize& delta, ScrollableArea** scrolledArea = nullptr);	217	void scrollByRecursively(const IntSize& delta, ScrollableArea** scrolledArea = nullptr);
211		218
212	WEBCORE_EXPORT void scrollToOffset(const ScrollOffset&, ScrollClamping = ScrollClamping::Clamped);	219	WEBCORE_EXPORT void scrollToOffset(const ScrollOffset&, ScrollClamping = ScrollClamping::Clamped);
		220	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		221	WEBCORE_EXPORT void scrollToOffsetWithAnimation(const ScrollOffset&, ScrollClamping = ScrollClamping::Clamped);
		222	#endif
213	void scrollToXOffset(int x, ScrollClamping clamping = ScrollClamping::Clamped) { scrollToOffset(ScrollOffset(x, scrollOffset().y()), clamping); }	223	void scrollToXOffset(int x, ScrollClamping clamping = ScrollClamping::Clamped) { scrollToOffset(ScrollOffset(x, scrollOffset().y()), clamping); }
214	void scrollToYOffset(int y, ScrollClamping clamping = ScrollClamping::Clamped) { scrollToOffset(ScrollOffset(scrollOffset().x(), y), clamping); }	224	void scrollToYOffset(int y, ScrollClamping clamping = ScrollClamping::Clamped) { scrollToOffset(ScrollOffset(scrollOffset().x(), y), clamping); }
215		225

Lines 724-729 public: a/Source/WebCore/rendering/style/RenderStyle.h_sec1
- a/Source/WebCore/rendering/style/RenderStyle.h +12 lines
724	bool useTouchOverflowScrolling() const { return m_rareInheritedData->useTouchOverflowScrolling; }	724	bool useTouchOverflowScrolling() const { return m_rareInheritedData->useTouchOverflowScrolling; }
725	#endif	725	#endif
726		726
		727	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		728	bool useSmoothScrolling() const { return m_rareNonInheritedData->useSmoothScrolling; }
		729	#endif
		730
727	#if ENABLE(TEXT_AUTOSIZING)	731	#if ENABLE(TEXT_AUTOSIZING)
728	TextSizeAdjustment textSizeAdjust() const { return m_rareInheritedData->textSizeAdjust; }	732	TextSizeAdjustment textSizeAdjust() const { return m_rareInheritedData->textSizeAdjust; }
729	#endif	733	#endif
Lines 1233-1238 public: a/Source/WebCore/rendering/style/RenderStyle.h_sec2
1233	void setUseTouchOverflowScrolling(bool v) { SET_VAR(m_rareInheritedData, useTouchOverflowScrolling, v); }	1237	void setUseTouchOverflowScrolling(bool v) { SET_VAR(m_rareInheritedData, useTouchOverflowScrolling, v); }
1234	#endif	1238	#endif
1235		1239
		1240	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		1241	void setUseSmoothScrolling(bool v) { SET_VAR(m_rareNonInheritedData, useSmoothScrolling, v); }
		1242	#endif
		1243
1236	#if ENABLE(TEXT_AUTOSIZING)	1244	#if ENABLE(TEXT_AUTOSIZING)
1237	void setTextSizeAdjust(TextSizeAdjustment adjustment) { SET_VAR(m_rareInheritedData, textSizeAdjust, adjustment); }	1245	void setTextSizeAdjust(TextSizeAdjustment adjustment) { SET_VAR(m_rareInheritedData, textSizeAdjust, adjustment); }
1238	#endif	1246	#endif
Lines 1659-1664 public: a/Source/WebCore/rendering/style/RenderStyle.h_sec3
1659	static bool initialUseTouchOverflowScrolling() { return false; }	1667	static bool initialUseTouchOverflowScrolling() { return false; }
1660	#endif	1668	#endif
1661		1669
		1670	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		1671	static bool initialUseSmoothScrolling() { return false; }
		1672	#endif
		1673
1662	#if ENABLE(DASHBOARD_SUPPORT)	1674	#if ENABLE(DASHBOARD_SUPPORT)
1663	static const Vector<StyleDashboardRegion>& initialDashboardRegions();	1675	static const Vector<StyleDashboardRegion>& initialDashboardRegions();
1664	static const Vector<StyleDashboardRegion>& noneDashboardRegions();	1676	static const Vector<StyleDashboardRegion>& noneDashboardRegions();

Lines 77-82 StyleRareNonInheritedData::StyleRareNonInheritedData() a/Source/WebCore/rendering/style/StyleRareNonInheritedData.cpp_sec1
- a/Source/WebCore/rendering/style/StyleRareNonInheritedData.cpp +9 lines
77	, justifySelf(RenderStyle::initialSelfAlignment())	77	, justifySelf(RenderStyle::initialSelfAlignment())
78	#if ENABLE(TOUCH_EVENTS)	78	#if ENABLE(TOUCH_EVENTS)
79	, touchAction(static_cast<unsigned>(RenderStyle::initialTouchAction()))	79	, touchAction(static_cast<unsigned>(RenderStyle::initialTouchAction()))
		80	#endif
		81	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		82	, useSmoothScrolling(static_cast<unsigned>(RenderStyle::initialUseSmoothScrolling()))
80	#endif	83	#endif
81	, pageSizeType(PAGE_SIZE_AUTO)	84	, pageSizeType(PAGE_SIZE_AUTO)
82	, transformStyle3D(static_cast<unsigned>(RenderStyle::initialTransformStyle3D()))	85	, transformStyle3D(static_cast<unsigned>(RenderStyle::initialTransformStyle3D()))
Lines 169-174 inline StyleRareNonInheritedData::StyleRareNonInheritedData(const StyleRareNonIn a/Source/WebCore/rendering/style/StyleRareNonInheritedData.cpp_sec2
169	, justifySelf(o.justifySelf)	172	, justifySelf(o.justifySelf)
170	#if ENABLE(TOUCH_EVENTS)	173	#if ENABLE(TOUCH_EVENTS)
171	, touchAction(o.touchAction)	174	, touchAction(o.touchAction)
		175	#endif
		176	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		177	, useSmoothScrolling(o.useSmoothScrolling)
172	#endif	178	#endif
173	, pageSizeType(o.pageSizeType)	179	, pageSizeType(o.pageSizeType)
174	, transformStyle3D(o.transformStyle3D)	180	, transformStyle3D(o.transformStyle3D)
Lines 282-287 bool StyleRareNonInheritedData::operator==(const StyleRareNonInheritedData& o) c a/Source/WebCore/rendering/style/StyleRareNonInheritedData.cpp_sec3
282	#if ENABLE(TOUCH_EVENTS)	288	#if ENABLE(TOUCH_EVENTS)
283	&& touchAction == o.touchAction	289	&& touchAction == o.touchAction
284	#endif	290	#endif
		291	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		292	&& useSmoothScrolling == o.useSmoothScrolling
		293	#endif
285	#if ENABLE(CSS_COMPOSITING)	294	#if ENABLE(CSS_COMPOSITING)
286	&& effectiveBlendMode == o.effectiveBlendMode	295	&& effectiveBlendMode == o.effectiveBlendMode
287	&& isolation == o.isolation	296	&& isolation == o.isolation

Lines 175-180 public: a/Source/WebCore/rendering/style/StyleRareNonInheritedData.h_sec1
- a/Source/WebCore/rendering/style/StyleRareNonInheritedData.h +4 lines
175	unsigned touchAction : 1; // TouchAction	175	unsigned touchAction : 1; // TouchAction
176	#endif	176	#endif
177		177
		178	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		179	unsigned useSmoothScrolling : 1; // ScrollBehavior
		180	#endif
		181
178	unsigned pageSizeType : 2; // PageSizeType	182	unsigned pageSizeType : 2; // PageSizeType
179	unsigned transformStyle3D : 1; // TransformStyle3D	183	unsigned transformStyle3D : 1; // TransformStyle3D
180	unsigned backfaceVisibility : 1; // BackfaceVisibility	184	unsigned backfaceVisibility : 1; // BackfaceVisibility

Lines 1645-1651 ExceptionOr<void> Internals::unconstrainedScrollTo(Element& element, double x, d a/Source/WebCore/testing/Internals.cpp_sec1
- a/Source/WebCore/testing/Internals.cpp -1 / +1 lines
1645	if (!document \|\| !document->view())	1645	if (!document \|\| !document->view())
1646	return Exception { InvalidAccessError };	1646	return Exception { InvalidAccessError };
1647		1647
1648	element.scrollTo({ x, y }, ScrollClamping::Unclamped);	1648	element.scrollTo(fromCoordinates(x, y), ScrollClamping::Unclamped);
1649	return { };	1649	return { };
1650	}	1650	}
1651		1651

Lines 40-45 ENABLE_ACCELERATED_2D_CANVAS = ; a/Source/WebKit/Configurations/FeatureDefines.xcconfig_sec1
- a/Source/WebKit/Configurations/FeatureDefines.xcconfig -1 / +3 lines
40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));	40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));
41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;	41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;
42		42
		43	ENABLE_CSSOM_SMOOTH_SCROLLING = ENABLE_CSSOM_SMOOTH_SCROLLING;
		44
43	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));	45	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));
44	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;	46	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;
45	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;	47	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;
Lines 374-377 ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET; a/Source/WebKit/Configurations/FeatureDefines.xcconfig_sec2
374		376
375	ENABLE_XSLT = ENABLE_XSLT;	377	ENABLE_XSLT = ENABLE_XSLT;
376		378
377	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);	379	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_CSSOM_SMOOTH_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);

Lines 1139-1144 SourceBufferChangeTypeEnabled: a/Source/WebKit/Shared/WebPreferences.yaml_sec1
- a/Source/WebKit/Shared/WebPreferences.yaml +7 lines
1139	# wider testing).	1139	# wider testing).
1140		1140
1141		1141
		1142	CSSomSmoothScrollingEnabled:
		1143	type: bool
		1144	defaultValue: false
		1145	humanReadableName: "CSSOM Smooth Scrolling"
		1146	humanReadableDescription: "Enable DOM API and CSS property for 'smooth' scroll behavior"
		1147	category: experimental
		1148
1142	SpringTimingFunctionEnabled:	1149	SpringTimingFunctionEnabled:
1143	type: bool	1150	type: bool
1144	defaultValue: DEFAULT_EXPERIMENTAL_FEATURES_ENABLED	1151	defaultValue: DEFAULT_EXPERIMENTAL_FEATURES_ENABLED

Lines 40-45 ENABLE_ACCELERATED_2D_CANVAS = ; a/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig_sec1
- a/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig -1 / +3 lines
40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));	40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));
41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;	41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;
42		42
		43	ENABLE_CSSOM_SMOOTH_SCROLLING = ENABLE_CSSOM_SMOOTH_SCROLLING;
		44
43	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));	45	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));
44	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;	46	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;
45	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;	47	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;
Lines 374-377 ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET; a/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig_sec2
374		376
375	ENABLE_XSLT = ENABLE_XSLT;	377	ENABLE_XSLT = ENABLE_XSLT;
376		378
377	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);	379	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_CSSOM_SMOOTH_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);

Lines 162-167 macro(WEBKIT_OPTION_BEGIN) a/Source/cmake/WebKitFeatures.cmake_sec1
- a/Source/cmake/WebKitFeatures.cmake +1 lines
162	WEBKIT_OPTION_DEFINE(ENABLE_SERVICE_CONTROLS "Toggle service controls support" PRIVATE OFF)	162	WEBKIT_OPTION_DEFINE(ENABLE_SERVICE_CONTROLS "Toggle service controls support" PRIVATE OFF)
163	WEBKIT_OPTION_DEFINE(ENABLE_SERVICE_WORKER "Toggle ServiceWorker support" PRIVATE OFF)	163	WEBKIT_OPTION_DEFINE(ENABLE_SERVICE_WORKER "Toggle ServiceWorker support" PRIVATE OFF)
164	WEBKIT_OPTION_DEFINE(ENABLE_SMOOTH_SCROLLING "Toggle smooth scrolling" PRIVATE ON)	164	WEBKIT_OPTION_DEFINE(ENABLE_SMOOTH_SCROLLING "Toggle smooth scrolling" PRIVATE ON)
		165	WEBKIT_OPTION_DEFINE(ENABLE_CSSOM_SMOOTH_SCROLLING "Toggle CSSOM smooth scrolling support" PRIVATE ON)
165	WEBKIT_OPTION_DEFINE(ENABLE_SPEECH_SYNTHESIS "Toggle Speech Synthesis API support" PRIVATE OFF)	166	WEBKIT_OPTION_DEFINE(ENABLE_SPEECH_SYNTHESIS "Toggle Speech Synthesis API support" PRIVATE OFF)
166	WEBKIT_OPTION_DEFINE(ENABLE_SPELLCHECK "Toggle Spellchecking support (requires Enchant)" PRIVATE OFF)	167	WEBKIT_OPTION_DEFINE(ENABLE_SPELLCHECK "Toggle Spellchecking support (requires Enchant)" PRIVATE OFF)
167	WEBKIT_OPTION_DEFINE(ENABLE_STREAMS_API "Toggle Streams API support" PRIVATE ON)	168	WEBKIT_OPTION_DEFINE(ENABLE_STREAMS_API "Toggle Streams API support" PRIVATE ON)

Lines 4-9 a/Source/cmake/tools/vsprops/FeatureDefines.props_sec1
- a/Source/cmake/tools/vsprops/FeatureDefines.props -1 / +6 lines
4	<ENABLE_3D_TRANSFORMS>ENABLE_3D_TRANSFORMS</ENABLE_3D_TRANSFORMS>	4	<ENABLE_3D_TRANSFORMS>ENABLE_3D_TRANSFORMS</ENABLE_3D_TRANSFORMS>
5	<ENABLE_ACCELERATED_2D_CANVAS />	5	<ENABLE_ACCELERATED_2D_CANVAS />
6	<ENABLE_ACCELERATED_OVERFLOW_SCROLLING />	6	<ENABLE_ACCELERATED_OVERFLOW_SCROLLING />
		7	<ENABLE_CSSOM_SMOOTH_SCROLLING>ENABLE_CSSOM_SMOOTH_SCROLLING</ENABLE_CSSOM_SMOOTH_SCROLLING>
7	<ENABLE_ATTACHMENT_ELEMENT>ENABLE_ATTACHMENT_ELEMENT</ENABLE_ATTACHMENT_ELEMENT>	8	<ENABLE_ATTACHMENT_ELEMENT>ENABLE_ATTACHMENT_ELEMENT</ENABLE_ATTACHMENT_ELEMENT>
8	<ENABLE_CHANNEL_MESSAGING>ENABLE_CHANNEL_MESSAGING</ENABLE_CHANNEL_MESSAGING>	9	<ENABLE_CHANNEL_MESSAGING>ENABLE_CHANNEL_MESSAGING</ENABLE_CHANNEL_MESSAGING>
9	<ENABLE_CSS3_CONDITIONAL_RULES>ENABLE_CSS3_CONDITIONAL_RULES</ENABLE_CSS3_CONDITIONAL_RULES>	10	<ENABLE_CSS3_CONDITIONAL_RULES>ENABLE_CSS3_CONDITIONAL_RULES</ENABLE_CSS3_CONDITIONAL_RULES>
Lines 76-82 a/Source/cmake/tools/vsprops/FeatureDefines.props_sec2
76	</PropertyGroup>	77	</PropertyGroup>
77	<ItemDefinitionGroup>	78	<ItemDefinitionGroup>
78	<ClCompile>	79	<ClCompile>
79	<PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_ICONDATABASE);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_NAVIGATOR_CONTENT_UTILS);$(ENABLE_STREAMS_API);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_WEBGPU);$(ENABLE_WEBVTT_REGIONS);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>	80	<PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING);$(ENABLE_CSSOM_SMOOTH_SCROLLING);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_ICONDATABASE);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_NAVIGATOR_CONTENT_UTILS);$(ENABLE_STREAMS_API);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_WEBGPU);$(ENABLE_WEBVTT_REGIONS);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>
80	</ClCompile>	81	</ClCompile>
81	</ItemDefinitionGroup>	82	</ItemDefinitionGroup>
82	<ItemGroup>	83	<ItemGroup>
Lines 92-97 a/Source/cmake/tools/vsprops/FeatureDefines.props_sec3
92	<Value>$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING)</Value>	93	<Value>$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING)</Value>
93	<EnvironmentVariable>true</EnvironmentVariable>	94	<EnvironmentVariable>true</EnvironmentVariable>
94	</BuildMacro>	95	</BuildMacro>
		96	<BuildMacro Include="ENABLE_CSSOM_SMOOTH_SCROLLING">
		97	<Value>$(ENABLE_CSSOM_SMOOTH_SCROLLING)</Value>
		98	<EnvironmentVariable>true</EnvironmentVariable>
		99	</BuildMacro>
95	<BuildMacro Include="ENABLE_ATTACHMENT_ELEMENT">	100	<BuildMacro Include="ENABLE_ATTACHMENT_ELEMENT">
96	<Value>$(ENABLE_ATTACHMENT_ELEMENT)</Value>	101	<Value>$(ENABLE_ATTACHMENT_ELEMENT)</Value>
97	<EnvironmentVariable>true</EnvironmentVariable>	102	<EnvironmentVariable>true</EnvironmentVariable>

Lines 4-9 a/Source/cmake/tools/vsprops/FeatureDefinesCairo.props_sec1
- a/Source/cmake/tools/vsprops/FeatureDefinesCairo.props -1 / +6 lines
4	<ENABLE_3D_TRANSFORMS>ENABLE_3D_TRANSFORMS</ENABLE_3D_TRANSFORMS>	4	<ENABLE_3D_TRANSFORMS>ENABLE_3D_TRANSFORMS</ENABLE_3D_TRANSFORMS>
5	<ENABLE_ACCELERATED_2D_CANVAS />	5	<ENABLE_ACCELERATED_2D_CANVAS />
6	<ENABLE_ACCELERATED_OVERFLOW_SCROLLING />	6	<ENABLE_ACCELERATED_OVERFLOW_SCROLLING />
		7	<ENABLE_CSSOM_SMOOTH_SCROLLING>ENABLE_CSSOM_SMOOTH_SCROLLING</ENABLE_CSSOM_SMOOTH_SCROLLING>
7	<ENABLE_ATTACHMENT_ELEMENT>ENABLE_ATTACHMENT_ELEMENT</ENABLE_ATTACHMENT_ELEMENT>	8	<ENABLE_ATTACHMENT_ELEMENT>ENABLE_ATTACHMENT_ELEMENT</ENABLE_ATTACHMENT_ELEMENT>
8	<ENABLE_CHANNEL_MESSAGING>ENABLE_CHANNEL_MESSAGING</ENABLE_CHANNEL_MESSAGING>	9	<ENABLE_CHANNEL_MESSAGING>ENABLE_CHANNEL_MESSAGING</ENABLE_CHANNEL_MESSAGING>
9	<ENABLE_CSS3_CONDITIONAL_RULES>ENABLE_CSS3_CONDITIONAL_RULES</ENABLE_CSS3_CONDITIONAL_RULES>	10	<ENABLE_CSS3_CONDITIONAL_RULES>ENABLE_CSS3_CONDITIONAL_RULES</ENABLE_CSS3_CONDITIONAL_RULES>
Lines 75-81 a/Source/cmake/tools/vsprops/FeatureDefinesCairo.props_sec2
75	</PropertyGroup>	76	</PropertyGroup>
76	<ItemDefinitionGroup>	77	<ItemDefinitionGroup>
77	<ClCompile>	78	<ClCompile>
78	<PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_ICONDATABASE);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_NAVIGATOR_CONTENT_UTILS);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_WEBVTT_REGIONS);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>	79	<PreprocessorDefinitions>$(ENABLE_3D_TRANSFORMS);$(ENABLE_ACCELERATED_2D_CANVAS);$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING);$(ENABLE_CSSOM_SMOOTH_SCROLLING);$(ENABLE_ATTACHMENT_ELEMENT);$(ENABLE_CHANNEL_MESSAGING);$(ENABLE_CSS3_CONDITIONAL_RULES);$(ENABLE_CSS_IMAGE_SET);$(ENABLE_CSS3_TEXT);$(ENABLE_CSS_BOX_DECORATION_BREAK);$(ENABLE_CSS_SHADERS);$(ENABLE_CSS_COMPOSITING);$(ENABLE_CSS_SELECTORS_LEVEL4);$(ENABLE_CSS_SHAPE_INSIDE);$(ENABLE_CSS_TRANSFORMS_ANIMATIONS_TRANSITIONS_UNPREFIXED);$(ENABLE_CURSOR_VISIBILITY);$(ENABLE_CUSTOM_SCHEME_HANDLER);$(ENABLE_DATAGRID);$(ENABLE_DATALIST_ELEMENT);$(ENABLE_DEVICE_ORIENTATION);$(ENABLE_DIRECTORY_UPLOAD);$(ENABLE_ENCRYPTED_MEDIA);$(ENABLE_FETCH_API);$(ENABLE_FILE_SYSTEM);$(ENABLE_FULLSCREEN_API);$(ENABLE_GAMEPAD);$(ENABLE_GEOLOCATION);$(ENABLE_HIGH_DPI_CANVAS);$(ENABLE_ICONDATABASE);$(ENABLE_INDEXED_DATABASE);$(ENABLE_INPUT_TYPE_COLOR);$(ENABLE_INPUT_SPEECH);$(ENABLE_INPUT_TYPE_DATE);$(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE);$(ENABLE_INPUT_TYPE_DATETIMELOCAL);$(ENABLE_INPUT_TYPE_MONTH);$(ENABLE_INPUT_TYPE_TIME);$(ENABLE_INPUT_TYPE_WEEK);$(ENABLE_INTL);$(ENABLE_LEGACY_CSS_VENDOR_PREFIXES);$(ENABLE_LEGACY_ENCRYPTED_MEDIA);$(ENABLE_LINK_PRERENDER);$(ENABLE_MATHML);$(ENABLE_METER_ELEMENT);$(ENABLE_MICRODATA);$(ENABLE_MOUSE_CURSOR_SCALE);$(ENABLE_NOTIFICATIONS);$(ENABLE_QUOTA);$(ENABLE_NAVIGATOR_CONTENT_UTILS);$(ENABLE_SCRIPTED_SPEECH);$(ENABLE_SHARED_WORKERS);$(ENABLE_MEDIA_CONTROLS_SCRIPT);$(ENABLE_MEDIA_SOURCE);$(ENABLE_MEDIA_STATISTICS);$(ENABLE_SQL_DATABASE);$(ENABLE_STYLE_SCOPED);$(ENABLE_SUBPIXEL_LAYOUT);$(ENABLE_SVG_DOM_OBJC_BINDINGS);$(ENABLE_SVG_FONTS);$(ENABLE_VIDEO);$(ENABLE_VIDEO_TRACK);$(ENABLE_WEB_AUDIO);$(ENABLE_WEBGL);$(ENABLE_WEBVTT_REGIONS);$(ENABLE_XHR_TIMEOUT);$(ENABLE_XSLT);%(PreprocessorDefinitions)</PreprocessorDefinitions>
79	</ClCompile>	80	</ClCompile>
80	</ItemDefinitionGroup>	81	</ItemDefinitionGroup>
81	<ItemGroup>	82	<ItemGroup>
Lines 91-96 a/Source/cmake/tools/vsprops/FeatureDefinesCairo.props_sec3
91	<Value>$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING)</Value>	92	<Value>$(ENABLE_ACCELERATED_OVERFLOW_SCROLLING)</Value>
92	<EnvironmentVariable>true</EnvironmentVariable>	93	<EnvironmentVariable>true</EnvironmentVariable>
93	</BuildMacro>	94	</BuildMacro>
		95	<BuildMacro Include="ENABLE_CSSOM_SMOOTH_SCROLLING">
		96	<Value>$(ENABLE_CSSOM_SMOOTH_SCROLLING)</Value>
		97	<EnvironmentVariable>true</EnvironmentVariable>
		98	</BuildMacro>
94	<BuildMacro Include="ENABLE_ATTACHMENT_ELEMENT">	99	<BuildMacro Include="ENABLE_ATTACHMENT_ELEMENT">
95	<Value>$(ENABLE_ATTACHMENT_ELEMENT)</Value>	100	<Value>$(ENABLE_ATTACHMENT_ELEMENT)</Value>
96	<EnvironmentVariable>true</EnvironmentVariable>	101	<EnvironmentVariable>true</EnvironmentVariable>

Lines 118-123 my ( a/Tools/Scripts/webkitperl/FeatureList.pm_sec1
- a/Tools/Scripts/webkitperl/FeatureList.pm +4 lines
118	$resolutionMediaQuerySupport,	118	$resolutionMediaQuerySupport,
119	$scriptedSpeechSupport,	119	$scriptedSpeechSupport,
120	$serviceWorkerSupport,	120	$serviceWorkerSupport,
		121	$cssomSmoothScrollingSupport,
121	$subtleCrypto,	122	$subtleCrypto,
122	$svgFontsSupport,	123	$svgFontsSupport,
123	$systemMallocSupport,	124	$systemMallocSupport,
Lines 337-342 my @features = ( a/Tools/Scripts/webkitperl/FeatureList.pm_sec2
337	{ option => "service-worker", desc => "Toggle Service Worker support",	338	{ option => "service-worker", desc => "Toggle Service Worker support",
338	define => "ENABLE_SERVICE_WORKER", value => \$serviceWorkerSupport },	339	define => "ENABLE_SERVICE_WORKER", value => \$serviceWorkerSupport },
339		340
		341	{ option => "cssom-smooth-scrolling", desc => "Toggle CSSOM Smooth Scroling support",
		342	define => "ENABLE_CSSOM_SMOOTH_SCROLLING", value => \$cssomSmoothScrollingSupport },
		343
340	{ option => "subtle-crypto", desc => "Toggle WebCrypto Subtle-Crypto support",	344	{ option => "subtle-crypto", desc => "Toggle WebCrypto Subtle-Crypto support",
341	define => "ENABLE_SUBTLE_CRYPTO", value => \$subtleCrypto },	345	define => "ENABLE_SUBTLE_CRYPTO", value => \$subtleCrypto },
342		346

Lines 40-45 ENABLE_ACCELERATED_2D_CANVAS = ; a/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig_sec1
- a/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig -2 / +3 lines
40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));	40	ENABLE_ACCELERATED_OVERFLOW_SCROLLING = $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING_$(WK_COCOA_TOUCH));
41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;	41	ENABLE_ACCELERATED_OVERFLOW_SCROLLING_cocoatouch = ENABLE_ACCELERATED_OVERFLOW_SCROLLING;
42		42
		43	ENABLE_CSSOM_SMOOTH_SCROLLING = ENABLE_CSSOM_SMOOTH_SCROLLING;
		44
43	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));	45	ENABLE_APPLE_PAY = $(ENABLE_APPLE_PAY_$(WK_PLATFORM_NAME));
44	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;	46	ENABLE_APPLE_PAY_iphoneos = ENABLE_APPLE_PAY;
45	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;	47	ENABLE_APPLE_PAY_iphonesimulator = ENABLE_APPLE_PAY;
Lines 374-377 ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET; a/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig_sec2
374		376
375	ENABLE_XSLT = ENABLE_XSLT;	377	ENABLE_XSLT = ENABLE_XSLT;
376		378
377	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);	379	FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_CSSOM_SMOOTH_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLE_PAY_SESSION_V4) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXPERIMENTAL_FEATURES) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
378	-

Return to Bug 188043

Lines 6211-6216 a/Source/WebCore/css/CSSProperties.json_sec1
- a/Source/WebCore/css/CSSProperties.json +17 lines
6211	"url": "https://www.w3.org/TR/css-ui-4/#propdef-user-select"	6211	"url": "https://www.w3.org/TR/css-ui-4/#propdef-user-select"
6212	}	6212	}
6213	},	6213	},
		6214	"scroll-behavior": {
		6215	"values": [
		6216	"auto",
		6217	"smooth"
		6218	],
		6219	"codegen-properties": {
		6220	"converter": "SmoothScrolling",
		6221	"enable-if": "ENABLE_CSSOM_SMOOTH_SCROLLING",
		6222	"name-for-methods": "UseSmoothScrolling"
		6223	},
		6224	"status": {
		6225	"status": "in development"
		6226	},
		6227	"specification": {
		6228	"url": "https://drafts.csswg.org/cssom-view/#propdef-scroll-behavior"
		6229	}
		6230	},
6214	"scroll-padding": {	6231	"scroll-padding": {
6215	"codegen-properties": {	6232	"codegen-properties": {
6216	"enable-if": "ENABLE_CSS_SCROLL_SNAP",	6233	"enable-if": "ENABLE_CSS_SCROLL_SNAP",

Lines 1574-1580 double DOMWindow::devicePixelRatio() const a/Source/WebCore/page/DOMWindow.cpp_sec1
- a/Source/WebCore/page/DOMWindow.cpp -4 / +14 lines
1574		1574
1575	void DOMWindow::scrollBy(double x, double y) const	1575	void DOMWindow::scrollBy(double x, double y) const
1576	{	1576	{
1577	scrollBy({ x, y });	1577	return scrollBy(fromCoordinates(x, y));
1578	}	1578	}
1579		1579
1580	void DOMWindow::scrollBy(const ScrollToOptions& options) const	1580	void DOMWindow::scrollBy(const ScrollToOptions& options) const
Lines 1596-1605 void DOMWindow::scrollBy(const ScrollToOptions& options) const a/Source/WebCore/page/DOMWindow.cpp_sec2
1596		1596
1597	void DOMWindow::scrollTo(double x, double y, ScrollClamping clamping) const	1597	void DOMWindow::scrollTo(double x, double y, ScrollClamping clamping) const
1598	{	1598	{
1599	scrollTo({ x, y }, clamping);	1599	return scrollTo(fromCoordinates(x, y), clamping);
1600	}	1600	}
1601		1601
1602	void DOMWindow::scrollTo(const ScrollToOptions& options, ScrollClamping) const	1602	void DOMWindow::scrollTo(const ScrollToOptions& options, ScrollClamping clamping) const
1603	{	1603	{
1604	if (!isCurrentlyDisplayedInFrame())	1604	if (!isCurrentlyDisplayedInFrame())
1605	return;	1605	return;
Lines 1612-1623 void DOMWindow::scrollTo(const ScrollToOptions& options, ScrollClamping) const a/Source/WebCore/page/DOMWindow.cpp_sec3
1612	view->contentsScrollPosition().x(), view->contentsScrollPosition().y()	1612	view->contentsScrollPosition().x(), view->contentsScrollPosition().y()
1613	);	1613	);
1614		1614
1615	if (!scrollToOptions.left.value() && !scrollToOptions.top.value() && view->contentsScrollPosition() == IntPoint(0, 0))	1615	if (!view->isScrollInProgress() && !scrollToOptions.left.value() && !scrollToOptions.top.value() && view->contentsScrollPosition() == IntPoint(0, 0))
1616	return;	1616	return;
1617		1617
1618	document()->updateLayoutIgnorePendingStylesheets();	1618	document()->updateLayoutIgnorePendingStylesheets();
1619		1619
1620	IntPoint layoutPos(view->mapFromCSSToLayoutUnits(scrollToOptions.left.value()), view->mapFromCSSToLayoutUnits(scrollToOptions.top.value()));	1620	IntPoint layoutPos(view->mapFromCSSToLayoutUnits(scrollToOptions.left.value()), view->mapFromCSSToLayoutUnits(scrollToOptions.top.value()));
		1621	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		1622	// FIXME: Should we use document()->scrollingElement()?
		1623	// See https://github.com/w3c/csswg-drafts/issues/2977
		1624	if (document()->documentElement() && useSmoothScrolling(scrollToOptions.behavior.value_or(ScrollBehavior::Auto), *document()->documentElement())) {
		1625	view->scrollToOffsetWithAnimation(layoutPos, clamping);
		1626	return;
		1627	}
		1628	#else
		1629	ASSERT_UNUSED(clamping);
		1630	#endif
1621	view->setContentsScrollPosition(layoutPos);	1631	view->setContentsScrollPosition(layoutPos);
1622	}	1632	}
1623		1633

Lines 2-36 a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-element-expected.txt_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-element-expected.txt -16 / +16 lines
2	PASS Element with auto scroll-behavior ; scroll() with default behavior	2	PASS Element with auto scroll-behavior ; scroll() with default behavior
3	PASS Element with auto scroll-behavior ; scroll() with auto behavior	3	PASS Element with auto scroll-behavior ; scroll() with auto behavior
4	PASS Element with auto scroll-behavior ; scroll() with instant behavior	4	PASS Element with auto scroll-behavior ; scroll() with instant behavior
5	FAIL Element with auto scroll-behavior ; scroll() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	5	PASS Element with auto scroll-behavior ; scroll() with smooth behavior
6	FAIL Element with smooth scroll-behavior ; scroll() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	6	PASS Element with smooth scroll-behavior ; scroll() with default behavior
7	FAIL Element with smooth scroll-behavior ; scroll() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	7	PASS Element with smooth scroll-behavior ; scroll() with auto behavior
8	PASS Element with smooth scroll-behavior ; scroll() with instant behavior	8	PASS Element with smooth scroll-behavior ; scroll() with instant behavior
9	FAIL Element with smooth scroll-behavior ; scroll() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	9	PASS Element with smooth scroll-behavior ; scroll() with smooth behavior
10	PASS Element with auto scroll-behavior ; scrollTo() with default behavior	10	PASS Element with auto scroll-behavior ; scrollTo() with default behavior
11	PASS Element with auto scroll-behavior ; scrollTo() with auto behavior	11	PASS Element with auto scroll-behavior ; scrollTo() with auto behavior
12	PASS Element with auto scroll-behavior ; scrollTo() with instant behavior	12	PASS Element with auto scroll-behavior ; scrollTo() with instant behavior
13	FAIL Element with auto scroll-behavior ; scrollTo() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	13	PASS Element with auto scroll-behavior ; scrollTo() with smooth behavior
14	FAIL Element with smooth scroll-behavior ; scrollTo() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	14	PASS Element with smooth scroll-behavior ; scrollTo() with default behavior
15	FAIL Element with smooth scroll-behavior ; scrollTo() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	15	PASS Element with smooth scroll-behavior ; scrollTo() with auto behavior
16	PASS Element with smooth scroll-behavior ; scrollTo() with instant behavior	16	PASS Element with smooth scroll-behavior ; scrollTo() with instant behavior
17	FAIL Element with smooth scroll-behavior ; scrollTo() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	17	PASS Element with smooth scroll-behavior ; scrollTo() with smooth behavior
18	PASS Element with auto scroll-behavior ; scrollBy() with default behavior	18	PASS Element with auto scroll-behavior ; scrollBy() with default behavior
19	PASS Element with auto scroll-behavior ; scrollBy() with auto behavior	19	PASS Element with auto scroll-behavior ; scrollBy() with auto behavior
20	PASS Element with auto scroll-behavior ; scrollBy() with instant behavior	20	PASS Element with auto scroll-behavior ; scrollBy() with instant behavior
21	FAIL Element with auto scroll-behavior ; scrollBy() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	21	PASS Element with auto scroll-behavior ; scrollBy() with smooth behavior
22	FAIL Element with smooth scroll-behavior ; scrollBy() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	22	PASS Element with smooth scroll-behavior ; scrollBy() with default behavior
23	FAIL Element with smooth scroll-behavior ; scrollBy() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	23	PASS Element with smooth scroll-behavior ; scrollBy() with auto behavior
24	PASS Element with smooth scroll-behavior ; scrollBy() with instant behavior	24	PASS Element with smooth scroll-behavior ; scrollBy() with instant behavior
25	FAIL Element with smooth scroll-behavior ; scrollBy() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	25	PASS Element with smooth scroll-behavior ; scrollBy() with smooth behavior
26	PASS Element with auto scroll-behavior ; scrollIntoView() with default behavior	26	PASS Element with auto scroll-behavior ; scrollIntoView() with default behavior
27	PASS Element with auto scroll-behavior ; scrollIntoView() with auto behavior	27	PASS Element with auto scroll-behavior ; scrollIntoView() with auto behavior
28	PASS Element with auto scroll-behavior ; scrollIntoView() with instant behavior	28	PASS Element with auto scroll-behavior ; scrollIntoView() with instant behavior
29	FAIL Element with auto scroll-behavior ; scrollIntoView() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	29	PASS Element with auto scroll-behavior ; scrollIntoView() with smooth behavior
30	FAIL Element with smooth scroll-behavior ; scrollIntoView() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	30	PASS Element with smooth scroll-behavior ; scrollIntoView() with default behavior
31	FAIL Element with smooth scroll-behavior ; scrollIntoView() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	31	PASS Element with smooth scroll-behavior ; scrollIntoView() with auto behavior
32	PASS Element with smooth scroll-behavior ; scrollIntoView() with instant behavior	32	PASS Element with smooth scroll-behavior ; scrollIntoView() with instant behavior
33	FAIL Element with smooth scroll-behavior ; scrollIntoView() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	33	PASS Element with smooth scroll-behavior ; scrollIntoView() with smooth behavior
34	PASS Aborting an ongoing smooth scrolling on an element with another smooth scrolling	34	PASS Aborting an ongoing smooth scrolling on an element with another smooth scrolling
35	PASS Aborting an ongoing smooth scrolling on an element with an instant scrolling	35	PASS Aborting an ongoing smooth scrolling on an element with an instant scrolling
36		36

Lines 3-37 PASS Page loaded a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-main-frame-root-expected.txt_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-main-frame-root-expected.txt -16 / +16 lines
3	PASS Main frame with auto scroll-behavior ; scroll() with default behavior	3	PASS Main frame with auto scroll-behavior ; scroll() with default behavior
4	PASS Main frame with auto scroll-behavior ; scroll() with auto behavior	4	PASS Main frame with auto scroll-behavior ; scroll() with auto behavior
5	PASS Main frame with auto scroll-behavior ; scroll() with instant behavior	5	PASS Main frame with auto scroll-behavior ; scroll() with instant behavior
6	FAIL Main frame with auto scroll-behavior ; scroll() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	6	PASS Main frame with auto scroll-behavior ; scroll() with smooth behavior
7	FAIL Main frame with smooth scroll-behavior ; scroll() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	7	PASS Main frame with smooth scroll-behavior ; scroll() with default behavior
8	FAIL Main frame with smooth scroll-behavior ; scroll() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	8	PASS Main frame with smooth scroll-behavior ; scroll() with auto behavior
9	PASS Main frame with smooth scroll-behavior ; scroll() with instant behavior	9	PASS Main frame with smooth scroll-behavior ; scroll() with instant behavior
10	FAIL Main frame with smooth scroll-behavior ; scroll() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	10	PASS Main frame with smooth scroll-behavior ; scroll() with smooth behavior
11	PASS Main frame with auto scroll-behavior ; scrollTo() with default behavior	11	PASS Main frame with auto scroll-behavior ; scrollTo() with default behavior
12	PASS Main frame with auto scroll-behavior ; scrollTo() with auto behavior	12	PASS Main frame with auto scroll-behavior ; scrollTo() with auto behavior
13	PASS Main frame with auto scroll-behavior ; scrollTo() with instant behavior	13	PASS Main frame with auto scroll-behavior ; scrollTo() with instant behavior
14	FAIL Main frame with auto scroll-behavior ; scrollTo() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	14	PASS Main frame with auto scroll-behavior ; scrollTo() with smooth behavior
15	FAIL Main frame with smooth scroll-behavior ; scrollTo() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	15	PASS Main frame with smooth scroll-behavior ; scrollTo() with default behavior
16	FAIL Main frame with smooth scroll-behavior ; scrollTo() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	16	PASS Main frame with smooth scroll-behavior ; scrollTo() with auto behavior
17	PASS Main frame with smooth scroll-behavior ; scrollTo() with instant behavior	17	PASS Main frame with smooth scroll-behavior ; scrollTo() with instant behavior
18	FAIL Main frame with smooth scroll-behavior ; scrollTo() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	18	PASS Main frame with smooth scroll-behavior ; scrollTo() with smooth behavior
19	PASS Main frame with auto scroll-behavior ; scrollBy() with default behavior	19	PASS Main frame with auto scroll-behavior ; scrollBy() with default behavior
20	PASS Main frame with auto scroll-behavior ; scrollBy() with auto behavior	20	PASS Main frame with auto scroll-behavior ; scrollBy() with auto behavior
21	PASS Main frame with auto scroll-behavior ; scrollBy() with instant behavior	21	PASS Main frame with auto scroll-behavior ; scrollBy() with instant behavior
22	FAIL Main frame with auto scroll-behavior ; scrollBy() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	22	PASS Main frame with auto scroll-behavior ; scrollBy() with smooth behavior
23	FAIL Main frame with smooth scroll-behavior ; scrollBy() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	23	PASS Main frame with smooth scroll-behavior ; scrollBy() with default behavior
24	FAIL Main frame with smooth scroll-behavior ; scrollBy() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	24	PASS Main frame with smooth scroll-behavior ; scrollBy() with auto behavior
25	PASS Main frame with smooth scroll-behavior ; scrollBy() with instant behavior	25	PASS Main frame with smooth scroll-behavior ; scrollBy() with instant behavior
26	FAIL Main frame with smooth scroll-behavior ; scrollBy() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	26	PASS Main frame with smooth scroll-behavior ; scrollBy() with smooth behavior
27	PASS Main frame with auto scroll-behavior ; scrollIntoView() with default behavior	27	PASS Main frame with auto scroll-behavior ; scrollIntoView() with default behavior
28	PASS Main frame with auto scroll-behavior ; scrollIntoView() with auto behavior	28	PASS Main frame with auto scroll-behavior ; scrollIntoView() with auto behavior
29	PASS Main frame with auto scroll-behavior ; scrollIntoView() with instant behavior	29	PASS Main frame with auto scroll-behavior ; scrollIntoView() with instant behavior
30	FAIL Main frame with auto scroll-behavior ; scrollIntoView() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	30	PASS Main frame with auto scroll-behavior ; scrollIntoView() with smooth behavior
31	FAIL Main frame with smooth scroll-behavior ; scrollIntoView() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	31	PASS Main frame with smooth scroll-behavior ; scrollIntoView() with default behavior
32	FAIL Main frame with smooth scroll-behavior ; scrollIntoView() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	32	PASS Main frame with smooth scroll-behavior ; scrollIntoView() with auto behavior
33	PASS Main frame with smooth scroll-behavior ; scrollIntoView() with instant behavior	33	PASS Main frame with smooth scroll-behavior ; scrollIntoView() with instant behavior
34	FAIL Main frame with smooth scroll-behavior ; scrollIntoView() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 2430 but got 2430	34	PASS Main frame with smooth scroll-behavior ; scrollIntoView() with smooth behavior
35	PASS Aborting an ongoing smooth scrolling on the main frame with another smooth scrolling	35	PASS Aborting an ongoing smooth scrolling on the main frame with another smooth scrolling
36	PASS Aborting an ongoing smooth scrolling on the main frame with an instant scrolling	36	PASS Aborting an ongoing smooth scrolling on the main frame with an instant scrolling
37		37

Lines 3-37 PASS iframe loaded a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-subframe-root-expected.txt_sec1
- a/LayoutTests/imported/w3c/web-platform-tests/css/cssom-view/scroll-behavior-subframe-root-expected.txt -16 / +16 lines
3	PASS Subframe with auto scroll-behavior ; scroll() with default behavior	3	PASS Subframe with auto scroll-behavior ; scroll() with default behavior
4	PASS Subframe with auto scroll-behavior ; scroll() with auto behavior	4	PASS Subframe with auto scroll-behavior ; scroll() with auto behavior
5	PASS Subframe with auto scroll-behavior ; scroll() with instant behavior	5	PASS Subframe with auto scroll-behavior ; scroll() with instant behavior
6	FAIL Subframe with auto scroll-behavior ; scroll() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	6	PASS Subframe with auto scroll-behavior ; scroll() with smooth behavior
7	FAIL Subframe with smooth scroll-behavior ; scroll() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	7	PASS Subframe with smooth scroll-behavior ; scroll() with default behavior
8	FAIL Subframe with smooth scroll-behavior ; scroll() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	8	PASS Subframe with smooth scroll-behavior ; scroll() with auto behavior
9	PASS Subframe with smooth scroll-behavior ; scroll() with instant behavior	9	PASS Subframe with smooth scroll-behavior ; scroll() with instant behavior
10	FAIL Subframe with smooth scroll-behavior ; scroll() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	10	PASS Subframe with smooth scroll-behavior ; scroll() with smooth behavior
11	PASS Subframe with auto scroll-behavior ; scrollTo() with default behavior	11	PASS Subframe with auto scroll-behavior ; scrollTo() with default behavior
12	PASS Subframe with auto scroll-behavior ; scrollTo() with auto behavior	12	PASS Subframe with auto scroll-behavior ; scrollTo() with auto behavior
13	PASS Subframe with auto scroll-behavior ; scrollTo() with instant behavior	13	PASS Subframe with auto scroll-behavior ; scrollTo() with instant behavior
14	FAIL Subframe with auto scroll-behavior ; scrollTo() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	14	PASS Subframe with auto scroll-behavior ; scrollTo() with smooth behavior
15	FAIL Subframe with smooth scroll-behavior ; scrollTo() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	15	PASS Subframe with smooth scroll-behavior ; scrollTo() with default behavior
16	FAIL Subframe with smooth scroll-behavior ; scrollTo() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	16	PASS Subframe with smooth scroll-behavior ; scrollTo() with auto behavior
17	PASS Subframe with smooth scroll-behavior ; scrollTo() with instant behavior	17	PASS Subframe with smooth scroll-behavior ; scrollTo() with instant behavior
18	FAIL Subframe with smooth scroll-behavior ; scrollTo() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	18	PASS Subframe with smooth scroll-behavior ; scrollTo() with smooth behavior
19	PASS Subframe with auto scroll-behavior ; scrollBy() with default behavior	19	PASS Subframe with auto scroll-behavior ; scrollBy() with default behavior
20	PASS Subframe with auto scroll-behavior ; scrollBy() with auto behavior	20	PASS Subframe with auto scroll-behavior ; scrollBy() with auto behavior
21	PASS Subframe with auto scroll-behavior ; scrollBy() with instant behavior	21	PASS Subframe with auto scroll-behavior ; scrollBy() with instant behavior
22	FAIL Subframe with auto scroll-behavior ; scrollBy() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	22	PASS Subframe with auto scroll-behavior ; scrollBy() with smooth behavior
23	FAIL Subframe with smooth scroll-behavior ; scrollBy() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	23	PASS Subframe with smooth scroll-behavior ; scrollBy() with default behavior
24	FAIL Subframe with smooth scroll-behavior ; scrollBy() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	24	PASS Subframe with smooth scroll-behavior ; scrollBy() with auto behavior
25	PASS Subframe with smooth scroll-behavior ; scrollBy() with instant behavior	25	PASS Subframe with smooth scroll-behavior ; scrollBy() with instant behavior
26	FAIL Subframe with smooth scroll-behavior ; scrollBy() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	26	PASS Subframe with smooth scroll-behavior ; scrollBy() with smooth behavior
27	PASS Subframe with auto scroll-behavior ; scrollIntoView() with default behavior	27	PASS Subframe with auto scroll-behavior ; scrollIntoView() with default behavior
28	PASS Subframe with auto scroll-behavior ; scrollIntoView() with auto behavior	28	PASS Subframe with auto scroll-behavior ; scrollIntoView() with auto behavior
29	PASS Subframe with auto scroll-behavior ; scrollIntoView() with instant behavior	29	PASS Subframe with auto scroll-behavior ; scrollIntoView() with instant behavior
30	FAIL Subframe with auto scroll-behavior ; scrollIntoView() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	30	PASS Subframe with auto scroll-behavior ; scrollIntoView() with smooth behavior
31	FAIL Subframe with smooth scroll-behavior ; scrollIntoView() with default behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	31	PASS Subframe with smooth scroll-behavior ; scrollIntoView() with default behavior
32	FAIL Subframe with smooth scroll-behavior ; scrollIntoView() with auto behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	32	PASS Subframe with smooth scroll-behavior ; scrollIntoView() with auto behavior
33	PASS Subframe with smooth scroll-behavior ; scrollIntoView() with instant behavior	33	PASS Subframe with smooth scroll-behavior ; scrollIntoView() with instant behavior
34	FAIL Subframe with smooth scroll-behavior ; scrollIntoView() with smooth behavior assert_less_than: Should not set scrollLeft immediately expected a number less than 500 but got 500	34	PASS Subframe with smooth scroll-behavior ; scrollIntoView() with smooth behavior
35	PASS Aborting an ongoing smooth scrolling on a subframe with another smooth scrolling	35	PASS Aborting an ongoing smooth scrolling on a subframe with another smooth scrolling
36	PASS Aborting an ongoing smooth scrolling on a subframe with an instant scrolling	36	PASS Aborting an ongoing smooth scrolling on a subframe with an instant scrolling
37		37

Lines 808-815 JS_BINDING_IDLS = \ a/Source/WebCore/DerivedSources.make_sec1
- a/Source/WebCore/DerivedSources.make +2 lines
808	$(WebCore)/page/PerformanceTiming.idl \	808	$(WebCore)/page/PerformanceTiming.idl \
809	$(WebCore)/page/RemoteDOMWindow.idl \	809	$(WebCore)/page/RemoteDOMWindow.idl \
810	$(WebCore)/page/Screen.idl \	810	$(WebCore)/page/Screen.idl \
		811	$(WebCore)/page/ScrollBehavior.idl \
811	$(WebCore)/page/ScrollIntoViewOptions.idl \	812	$(WebCore)/page/ScrollIntoViewOptions.idl \
812	$(WebCore)/page/ScrollLogicalPosition.idl \	813	$(WebCore)/page/ScrollLogicalPosition.idl \
		814	$(WebCore)/page/ScrollOptions.idl \
813	$(WebCore)/page/ScrollToOptions.idl \	815	$(WebCore)/page/ScrollToOptions.idl \
814	$(WebCore)/page/UserMessageHandler.idl \	816	$(WebCore)/page/UserMessageHandler.idl \
815	$(WebCore)/page/UserMessageHandlersNamespace.idl \	817	$(WebCore)/page/UserMessageHandlersNamespace.idl \

Lines 56-62 page/scrolling/coordinatedgraphics/ScrollingStateNodeCoordinatedGraphics.cpp a/Source/WebCore/SourcesGTK.txt_sec1
- a/Source/WebCore/SourcesGTK.txt +2 lines
56	page/scrolling/generic/ScrollingThreadGeneric.cpp	56	page/scrolling/generic/ScrollingThreadGeneric.cpp
57		57
58	platform/ScrollAnimationKinetic.cpp	58	platform/ScrollAnimationKinetic.cpp
		59	#if !ENABLE_CSSOM_SMOOTH_SCROLLING
59	platform/ScrollAnimationSmooth.cpp	60	platform/ScrollAnimationSmooth.cpp
		61	#endif
60	platform/UserAgentQuirks.cpp	62	platform/UserAgentQuirks.cpp
61		63
62	platform/geoclue/GeolocationProviderGeoclue.cpp	64	platform/geoclue/GeolocationProviderGeoclue.cpp

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Lines 19511-19520 a/Source/WebCore/WebCore.xcodeproj/project.pbxproj_sec5
19511	BCEC01BA0C274DAC009F4EC9 /* Screen.cpp */,	19526	BCEC01BA0C274DAC009F4EC9 /* Screen.cpp */,
19512	BCEC01BB0C274DAC009F4EC9 /* Screen.h */,	19527	BCEC01BB0C274DAC009F4EC9 /* Screen.h */,
19513	BCEC01BC0C274DAC009F4EC9 /* Screen.idl */,	19528	BCEC01BC0C274DAC009F4EC9 /* Screen.idl */,
		19529	8350C3E71DA59B6200356434 /* ScrollBehavior.cpp */,
		19530	8350C3E71DA59B6200356424 /* ScrollBehavior.h */,
		19531	8350C3E81DA59B6200356424 /* ScrollBehavior.idl */,
19514	8350C3E71DA59B6200355435 /* ScrollIntoViewOptions.h */,	19532	8350C3E71DA59B6200355435 /* ScrollIntoViewOptions.h */,
19515	8350C3E81DA59B6200355435 /* ScrollIntoViewOptions.idl */,	19533	8350C3E81DA59B6200355435 /* ScrollIntoViewOptions.idl */,
19516	8350C3E71DA59B6200355424 /* ScrollLogicalPosition.h */,	19534	8350C3E71DA59B6200355424 /* ScrollLogicalPosition.h */,
19517	8350C3E81DA59B6200355424 /* ScrollLogicalPosition.idl */,	19535	8350C3E81DA59B6200355424 /* ScrollLogicalPosition.idl */,
		19536	8350C3E71DA59B6200356435 /* ScrollOptions.h */,
		19537	8350C3E81DA59B6200356435 /* ScrollOptions.idl */,
19518	8350C3E71DA59B6200356446 /* ScrollToOptions.h */,	19538	8350C3E71DA59B6200356446 /* ScrollToOptions.h */,
19519	8350C3E81DA59B6200356446 /* ScrollToOptions.idl */,	19539	8350C3E81DA59B6200356446 /* ScrollToOptions.idl */,
19520	BCD0E0F70E972C3500265DEA /* SecurityOrigin.cpp */,	19540	BCD0E0F70E972C3500265DEA /* SecurityOrigin.cpp */,
Lines 24264-24273 a/Source/WebCore/WebCore.xcodeproj/project.pbxproj_sec6
24264	46C376612085176D00C73829 /* JSRemoteDOMWindow.h */,	24284	46C376612085176D00C73829 /* JSRemoteDOMWindow.h */,
24265	BCEC01C00C274DDD009F4EC9 /* JSScreen.cpp */,	24285	BCEC01C00C274DDD009F4EC9 /* JSScreen.cpp */,
24266	BCEC01C10C274DDD009F4EC9 /* JSScreen.h */,	24286	BCEC01C10C274DDD009F4EC9 /* JSScreen.h */,
		24287	83E9B3001DA5A51E00FFE8D4 /* JSScrollBehavior.cpp */,
		24288	83E9B3011DA5A51E00FFE8D4 /* JSScrollBehavior.h */,
24267	83E9B3001DA5A51E00FFD8E5 /* JSScrollIntoViewOptions.cpp */,	24289	83E9B3001DA5A51E00FFD8E5 /* JSScrollIntoViewOptions.cpp */,
24268	83E9B3011DA5A51E00FFD8E5 /* JSScrollIntoViewOptions.h */,	24290	83E9B3011DA5A51E00FFD8E5 /* JSScrollIntoViewOptions.h */,
24269	83E9B3001DA5A51E00FFD8D4 /* JSScrollLogicalPosition.cpp */,	24291	83E9B3001DA5A51E00FFD8D4 /* JSScrollLogicalPosition.cpp */,
24270	83E9B3011DA5A51E00FFD8D4 /* JSScrollLogicalPosition.h */,	24292	83E9B3011DA5A51E00FFD8D4 /* JSScrollLogicalPosition.h */,
		24293	83E9B3001DA5A51E00FFE8E5 /* JSScrollOptions.cpp */,
		24294	83E9B3011DA5A51E00FFE8E5 /* JSScrollOptions.h */,
24271	83E9B3001DA5A51E00FFE8F6 /* JSScrollToOptions.cpp */,	24295	83E9B3001DA5A51E00FFE8F6 /* JSScrollToOptions.cpp */,
24272	83E9B3011DA5A51E00FFE8F6 /* JSScrollToOptions.h */,	24296	83E9B3011DA5A51E00FFE8F6 /* JSScrollToOptions.h */,
24273	7C73FB0F191EF6F4007DE061 /* JSUserMessageHandler.cpp */,	24297	7C73FB0F191EF6F4007DE061 /* JSUserMessageHandler.cpp */,
Lines 29055-29062 a/Source/WebCore/WebCore.xcodeproj/project.pbxproj_sec7
29055	5E2C436C1BCF071E0001E2BC /* JSRTCTrackEvent.h in Headers */,	29079	5E2C436C1BCF071E0001E2BC /* JSRTCTrackEvent.h in Headers */,
29056	BCEC01C30C274DDD009F4EC9 /* JSScreen.h in Headers */,	29080	BCEC01C30C274DDD009F4EC9 /* JSScreen.h in Headers */,
29057	FDA15ECE12B03F61003A583A /* JSScriptProcessorNode.h in Headers */,	29081	FDA15ECE12B03F61003A583A /* JSScriptProcessorNode.h in Headers */,
		29082	834476EF1DA5BC5E002B6EB0 /* JSScrollBehavior.h in Headers */,
29058	834476EF1DA5BC5E002B5EC1 /* JSScrollIntoViewOptions.h in Headers */,	29083	834476EF1DA5BC5E002B5EC1 /* JSScrollIntoViewOptions.h in Headers */,
29059	834476EF1DA5BC5E002B5EB0 /* JSScrollLogicalPosition.h in Headers */,	29084	834476EF1DA5BC5E002B5EB0 /* JSScrollLogicalPosition.h in Headers */,
		29085	834476EF1DA5BC5E002B6EC1 /* JSScrollOptions.h in Headers */,
29060	834476EF1DA5BC5E002B6ED2 /* JSScrollToOptions.h in Headers */,	29086	834476EF1DA5BC5E002B6ED2 /* JSScrollToOptions.h in Headers */,
29061	CED06AD11C77754800FDFAF1 /* JSSecurityPolicyViolationEvent.h in Headers */,	29087	CED06AD11C77754800FDFAF1 /* JSSecurityPolicyViolationEvent.h in Headers */,
29062	5182C2561F3143CD0059BA7C /* JSServiceWorker.h in Headers */,	29088	5182C2561F3143CD0059BA7C /* JSServiceWorker.h in Headers */,
Lines 30216-30221 a/Source/WebCore/WebCore.xcodeproj/project.pbxproj_sec8
30216	44C991860F3D1EBE00586670 /* ScrollbarThemeIOS.h in Headers */,	30242	44C991860F3D1EBE00586670 /* ScrollbarThemeIOS.h in Headers */,
30217	BC8B853E0E7C7F1100AB6984 /* ScrollbarThemeMac.h in Headers */,	30243	BC8B853E0E7C7F1100AB6984 /* ScrollbarThemeMac.h in Headers */,
30218	0FE71406142170B800DB33BA /* ScrollbarThemeMock.h in Headers */,	30244	0FE71406142170B800DB33BA /* ScrollbarThemeMock.h in Headers */,
		30245	83C5795D1DA5C301006FAC86 /* ScrollBehavior.h in Headers */,
30219	1AA84F05143BA7BD0051D153 /* ScrollController.h in Headers */,	30246	1AA84F05143BA7BD0051D153 /* ScrollController.h in Headers */,
30220	0F605AED15F94848004DF0C0 /* ScrollingConstraints.h in Headers */,	30247	0F605AED15F94848004DF0C0 /* ScrollingConstraints.h in Headers */,
30221	1AF62EE814DA22A70041556C /* ScrollingCoordinator.h in Headers */,	30248	1AF62EE814DA22A70041556C /* ScrollingCoordinator.h in Headers */,
Lines 30246-30251 a/Source/WebCore/WebCore.xcodeproj/project.pbxproj_sec9
30246	83C5795D1DA5C301006F9C97 /* ScrollIntoViewOptions.h in Headers */,	30273	83C5795D1DA5C301006F9C97 /* ScrollIntoViewOptions.h in Headers */,
30247	7AAFE8D019CB8672000F56D8 /* ScrollLatchingState.h in Headers */,	30274	7AAFE8D019CB8672000F56D8 /* ScrollLatchingState.h in Headers */,
30248	83C5795D1DA5C301006F9C86 /* ScrollLogicalPosition.h in Headers */,	30275	83C5795D1DA5C301006F9C86 /* ScrollLogicalPosition.h in Headers */,
		30276	83C5795D1DA5C301006FAC97 /* ScrollOptions.h in Headers */,
30249	F478755419983AFF0024A287 /* ScrollSnapAnimatorState.h in Headers */,	30277	F478755419983AFF0024A287 /* ScrollSnapAnimatorState.h in Headers */,
30250	F46729281E0DE68500ACC3D8 /* ScrollSnapOffsetsInfo.h in Headers */,	30278	F46729281E0DE68500ACC3D8 /* ScrollSnapOffsetsInfo.h in Headers */,
30251	83C5795D1DA5C301006FACA8 /* ScrollToOptions.h in Headers */,	30279	83C5795D1DA5C301006FACA8 /* ScrollToOptions.h in Headers */,

Lines 681-687 void Element::scrollIntoView(std::optional<Variant<bool, ScrollIntoViewOptions>> a/Source/WebCore/dom/Element.cpp_sec1
- a/Source/WebCore/dom/Element.cpp -8 / +26 lines
681	bool insideFixed;	681	bool insideFixed;
682	LayoutRect absoluteBounds = renderer()->absoluteAnchorRect(&insideFixed);	682	LayoutRect absoluteBounds = renderer()->absoluteAnchorRect(&insideFixed);
683		683
684	// FIXME(webkit.org/b/188043): Support ScrollBehavior.
685	ScrollIntoViewOptions options;	684	ScrollIntoViewOptions options;
686	if (arg) {	685	if (arg) {
687	auto value = arg.value();	686	auto value = arg.value();
Lines 691-699 void Element::scrollIntoView(std::optional<Variant<bool, ScrollIntoViewOptions>> a/Source/WebCore/dom/Element.cpp_sec2
691	options.blockPosition = ScrollLogicalPosition::End;	690	options.blockPosition = ScrollLogicalPosition::End;
692	}	691	}
693		692
694	ScrollAlignment alignX = toScrollAlignment(options.inlinePosition, false);	693	ScrollRectToVisibleOptions scrollRectToVisibleOptions {
695	ScrollAlignment alignY = toScrollAlignment(options.blockPosition, true);	694	SelectionRevealMode::Reveal,
696	renderer()->scrollRectToVisible(absoluteBounds, insideFixed, { SelectionRevealMode::Reveal, alignX, alignY, ShouldAllowCrossOriginScrolling::No });	695	toScrollAlignment(options.inlinePosition, false),
		696	toScrollAlignment(options.blockPosition, true),
		697	ShouldAllowCrossOriginScrolling::No
		698	};
		699	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		700	if (options.behavior)
		701	scrollRectToVisibleOptions.behavior = options.behavior.value();
		702	#endif
		703	renderer()->scrollRectToVisible(absoluteBounds, insideFixed, scrollRectToVisibleOptions);
697	}	704	}
698		705
699	void Element::scrollIntoView(bool alignToTop)	706	void Element::scrollIntoView(bool alignToTop)
Lines 752-758 void Element::scrollBy(const ScrollToOptions& options) a/Source/WebCore/dom/Element.cpp_sec3
752		759
753	void Element::scrollBy(double x, double y)	760	void Element::scrollBy(double x, double y)
754	{	761	{
755	scrollBy({ x, y });	762	scrollBy(fromCoordinates(x, y));
756	}	763	}
757		764
758	void Element::scrollTo(const ScrollToOptions& options, ScrollClamping clamping)	765	void Element::scrollTo(const ScrollToOptions& options, ScrollClamping clamping)
Lines 788-800 void Element::scrollTo(const ScrollToOptions& options, ScrollClamping clamping) a/Source/WebCore/dom/Element.cpp_sec4
788	adjustForAbsoluteZoom(renderer->scrollLeft(), *renderer),	795	adjustForAbsoluteZoom(renderer->scrollLeft(), *renderer),
789	adjustForAbsoluteZoom(renderer->scrollTop(), *renderer)	796	adjustForAbsoluteZoom(renderer->scrollTop(), *renderer)
790	);	797	);
791	renderer->setScrollLeft(clampToInteger(scrollToOptions.left.value() * renderer->style().effectiveZoom()), clamping);	798
792	renderer->setScrollTop(clampToInteger(scrollToOptions.top.value() * renderer->style().effectiveZoom()), clamping);	799	IntPoint scrollPosition(
		800	clampToInteger(scrollToOptions.left.value() * renderer->style().effectiveZoom()),
		801	clampToInteger(scrollToOptions.top.value() * renderer->style().effectiveZoom())
		802	);
		803	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		804	if (useSmoothScrolling(scrollToOptions.behavior.value_or(ScrollBehavior::Auto), *this)) {
		805	renderer->scrollToPositionWithAnimation(scrollPosition, clamping);
		806	return;
		807	}
		808	#endif
		809	renderer->setScrollLeft(scrollPosition.x(), clamping);
		810	renderer->setScrollTop(scrollPosition.y(), clamping);
793	}	811	}
794		812
795	void Element::scrollTo(double x, double y)	813	void Element::scrollTo(double x, double y)
796	{	814	{
797	scrollTo({ x, y });	815	scrollTo(fromCoordinates(x, y));
798	}	816	}
799		817
800	void Element::scrollByUnits(int units, ScrollGranularity granularity)	818	void Element::scrollByUnits(int units, ScrollGranularity granularity)

Line 0 a/Source/WebCore/page/ScrollBehavior.cpp_sec1
- a/Source/WebCore/page/ScrollBehavior.cpp +52 lines
	1	/*
	2	* Copyright (C) 2018 Igalia S.L.
	3	*
	4	* This library is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU Library General Public
	6	* License as published by the Free Software Foundation; either
	7	* version 2 of the License, or (at your option) any later version.
	8	*
	9	* This library is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* Library General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU Library General Public License
	15	* along with this library; see the file COPYING.LIB. If not, write to
	16	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	17	* Boston, MA 02110-1301, USA.
	18	*/
	19
	20	#include "config.h"
	21	#include "ScrollBehavior.h"
	22
	23	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
	24
	25	#include "Element.h"
	26	#include "RenderElement.h"
	27	#include "RenderStyle.h"
	28	#include "Settings.h"
	29
	30	namespace WebCore {
	31
	32	bool useSmoothScrolling(ScrollBehavior behavior, Element& associatedElement)
	33	{
	34	if (!associatedElement.document().settings().cssomSmoothScrollingEnabled() \|\| !associatedElement.renderer())
	35	return false;
	36
	37	// https://drafts.csswg.org/cssom-view/#scrolling
	38	switch (behavior) {
	39	case ScrollBehavior::Auto:
	40	return associatedElement.renderer()->style().useSmoothScrolling();
	41	case ScrollBehavior::Instant:
	42	return false;
	43	case ScrollBehavior::Smooth:
	44	return true;
	45	}
	46	ASSERT_NOT_REACHED();
	47	return false;
	48	}
	49
	50	} // namespace WebCore
	51
	52	#endif // ENABLE(CSSOM_SMOOTH_SCROLLING)

Line 0 a/Source/WebCore/page/ScrollBehavior.h_sec1
- a/Source/WebCore/page/ScrollBehavior.h +38 lines
	1	/*
	2	* Copyright (C) 2018 Igalia S.L.
	3	*
	4	* This library is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU Library General Public
	6	* License as published by the Free Software Foundation; either
	7	* version 2 of the License, or (at your option) any later version.
	8	*
	9	* This library is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* Library General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU Library General Public License
	15	* along with this library; see the file COPYING.LIB. If not, write to
	16	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	17	* Boston, MA 02110-1301, USA.
	18	*/
	19
	20	#pragma once
	21
	22	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
	23
	24	namespace WebCore {
	25
	26	class Element;
	27
	28	enum class ScrollBehavior : uint8_t {
	29	Auto = 0,
	30	Instant,
	31	Smooth
	32	};
	33
	34	bool useSmoothScrolling(ScrollBehavior, Element& associatedElement);
	35
	36	} // namespace WebCore
	37
	38	#endif // ENABLE(CSSOM_SMOOTH_SCROLLING)

Line 0 a/Source/WebCore/page/ScrollBehavior.idl_sec1
- a/Source/WebCore/page/ScrollBehavior.idl +20 lines
	1	/*
	2	* Copyright (C) 2018 Igalia S.L.
	3	*
	4	* This library is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU Library General Public
	6	* License as published by the Free Software Foundation; either
	7	* version 2 of the License, or (at your option) any later version.
	8	*
	9	* This library is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* Library General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU Library General Public License
	15	* along with this library; see the file COPYING.LIB. If not, write to
	16	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	17	* Boston, MA 02110-1301, USA.
	18	*/
	19
	20	enum ScrollBehavior { "auto", "instant", "smooth" };

Line 0 a/Source/WebCore/page/ScrollOptions.h_sec1
- a/Source/WebCore/page/ScrollOptions.h +34 lines
	1	/*
	2	* Copyright (C) 2018 Igalia S.L.
	3	*
	4	* This library is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU Library General Public
	6	* License as published by the Free Software Foundation; either
	7	* version 2 of the License, or (at your option) any later version.
	8	*
	9	* This library is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* Library General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU Library General Public License
	15	* along with this library; see the file COPYING.LIB. If not, write to
	16	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	17	* Boston, MA 02110-1301, USA.
	18	*/
	19
	20	#pragma once
	21
	22	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
	23
	24	#include "ScrollBehavior.h"
	25
	26	namespace WebCore {
	27
	28	struct ScrollOptions {
	29	std::optional<ScrollBehavior> behavior { ScrollBehavior::Auto };
	30	};
	31
	32	} // namespace WebCore
	33
	34	#endif // ENABLE(CSSOM_SMOOTH_SCROLLING)

Line 0 a/Source/WebCore/page/ScrollOptions.idl_sec1
- a/Source/WebCore/page/ScrollOptions.idl +22 lines
	1	/*
	2	* Copyright (C) 2018 Igalia S.L.
	3	*
	4	* This library is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU Library General Public
	6	* License as published by the Free Software Foundation; either
	7	* version 2 of the License, or (at your option) any later version.
	8	*
	9	* This library is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* Library General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU Library General Public License
	15	* along with this library; see the file COPYING.LIB. If not, write to
	16	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	17	* Boston, MA 02110-1301, USA.
	18	*/
	19
	20	dictionary ScrollOptions {
	21	ScrollBehavior behavior = "auto";
	22	};

Lines 32-46 namespace WebCore { a/Source/WebCore/platform/ScrollAnimation.h_sec1
- a/Source/WebCore/platform/ScrollAnimation.h +3 lines
32		32
33	class FloatPoint;	33	class FloatPoint;
34	class ScrollableArea;	34	class ScrollableArea;
		35	enum class ScrollClamping;
35		36
36	class ScrollAnimation {	37	class ScrollAnimation {
37	public:	38	public:
38	virtual ~ScrollAnimation() { };	39	virtual ~ScrollAnimation() { };
39	virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float /* step /, float / multiplier */) { return true; };	40	virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float /* step /, float / multiplier */) { return true; };
		41	virtual void scroll(const FloatPoint&, ScrollClamping) { };
40	virtual void stop() = 0;	42	virtual void stop() = 0;
41	virtual void updateVisibleLengths() { };	43	virtual void updateVisibleLengths() { };
42	virtual void setCurrentPosition(const FloatPoint&) { };	44	virtual void setCurrentPosition(const FloatPoint&) { };
43	virtual void serviceAnimation() { };	45	virtual void serviceAnimation() { };
		46	virtual bool isScrollInProgress() const { return false; }
44		47
45	protected:	48	protected:
46	ScrollAnimation(ScrollableArea& scrollableArea)	49	ScrollAnimation(ScrollableArea& scrollableArea)

Lines 27-33 a/Source/WebCore/platform/ScrollAnimationSmooth.h_sec1
- a/Source/WebCore/platform/ScrollAnimationSmooth.h -3 / +6 lines
27		27
28	#include "ScrollAnimation.h"	28	#include "ScrollAnimation.h"
29		29
30	#if ENABLE(SMOOTH_SCROLLING)	30	#if ENABLE(SMOOTH_SCROLLING) \|\| ENABLE(CSSOM_SMOOTH_SCROLLING)
31		31
32	#include "Timer.h"	32	#include "Timer.h"
33		33
Lines 35-40 namespace WebCore { a/Source/WebCore/platform/ScrollAnimationSmooth.h_sec2
35		35
36	class FloatPoint;	36	class FloatPoint;
37	class ScrollableArea;	37	class ScrollableArea;
		38	enum class ScrollClamping;
38		39
39	class ScrollAnimationSmooth final: public ScrollAnimation {	40	class ScrollAnimationSmooth final: public ScrollAnimation {
40	public:	41	public:
Lines 51-59 public: a/Source/WebCore/platform/ScrollAnimationSmooth.h_sec3
51		52
52	private:	53	private:
53	bool scroll(ScrollbarOrientation, ScrollGranularity, float step, float multiplier) override;	54	bool scroll(ScrollbarOrientation, ScrollGranularity, float step, float multiplier) override;
		55	void scroll(const FloatPoint&, ScrollClamping) override;
54	void stop() override;	56	void stop() override;
55	void updateVisibleLengths() override;	57	void updateVisibleLengths() override;
56	void setCurrentPosition(const FloatPoint&) override;	58	void setCurrentPosition(const FloatPoint&) override;
		59	bool isScrollInProgress() const override { return animationTimerActive(); }
57		60
58	struct PerAxisData {	61	struct PerAxisData {
59	PerAxisData() = delete;	62	PerAxisData() = delete;
Lines 89-95 private: a/Source/WebCore/platform/ScrollAnimationSmooth.h_sec4
89	int visibleLength { 0 };	92	int visibleLength { 0 };
90	};	93	};
91		94
92	bool updatePerAxisData(PerAxisData&, ScrollGranularity, float delta, float minScrollPosition, float maxScrollPosition);	95	bool updatePerAxisData(PerAxisData&, ScrollGranularity, float delta, float minScrollPosition, float maxScrollPosition, double smoothFactor = 1);
93	bool animateScroll(PerAxisData&, MonotonicTime currentTime);	96	bool animateScroll(PerAxisData&, MonotonicTime currentTime);
94		97
95	void requestAnimationTimerFired();	98	void requestAnimationTimerFired();
Lines 108-111 private: a/Source/WebCore/platform/ScrollAnimationSmooth.h_sec5
108		111
109	} // namespace WebCore	112	} // namespace WebCore
110		113
111	#endif // ENABLE(SMOOTH_SCROLLING)	114	#endif // ENABLE(SMOOTH_SCROLLING) \|\| ENABLE(CSSOM_SMOOTH_SCROLLING)

Lines 63-68 bool ScrollAnimatorSmooth::scroll(ScrollbarOrientation orientation, ScrollGranul a/Source/WebCore/platform/ScrollAnimatorSmooth.cpp_sec1
- a/Source/WebCore/platform/ScrollAnimatorSmooth.cpp -2 / +8 lines
63	if (!m_scrollableArea.scrollAnimatorEnabled())	63	if (!m_scrollableArea.scrollAnimatorEnabled())
64	return ScrollAnimator::scroll(orientation, granularity, step, multiplier);	64	return ScrollAnimator::scroll(orientation, granularity, step, multiplier);
65		65
		66	m_animation->setCurrentPosition(m_currentPosition);
66	return m_animation->scroll(orientation, granularity, step, multiplier);	67	return m_animation->scroll(orientation, granularity, step, multiplier);
67	}	68	}
68		69
Lines 79-105 void ScrollAnimatorSmooth::scrollToOffsetWithoutAnimation(const FloatPoint& offs a/Source/WebCore/platform/ScrollAnimatorSmooth.cpp_sec2
79	#if !USE(REQUEST_ANIMATION_FRAME_TIMER)	80	#if !USE(REQUEST_ANIMATION_FRAME_TIMER)
80	void ScrollAnimatorSmooth::cancelAnimations()	81	void ScrollAnimatorSmooth::cancelAnimations()
81	{	82	{
		83	ScrollAnimator::cancelAnimations();
82	m_animation->stop();	84	m_animation->stop();
83	}	85	}
84		86
85	void ScrollAnimatorSmooth::serviceScrollAnimations()	87	void ScrollAnimatorSmooth::serviceScrollAnimations()
86	{	88	{
		89	ScrollAnimator::serviceScrollAnimations();
87	m_animation->serviceAnimation();	90	m_animation->serviceAnimation();
88	}	91	}
89	#endif	92	#endif
90		93
91	void ScrollAnimatorSmooth::willEndLiveResize()	94	void ScrollAnimatorSmooth::willEndLiveResize()
92	{	95	{
		96	ScrollAnimator::willEndLiveResize();
93	m_animation->updateVisibleLengths();	97	m_animation->updateVisibleLengths();
94	}	98	}
95		99
96	void ScrollAnimatorSmooth::didAddVerticalScrollbar(Scrollbar*)	100	void ScrollAnimatorSmooth::didAddVerticalScrollbar(Scrollbar* scrollbar)
97	{	101	{
		102	ScrollAnimator::didAddVerticalScrollbar(scrollbar);
98	m_animation->updateVisibleLengths();	103	m_animation->updateVisibleLengths();
99	}	104	}
100		105
101	void ScrollAnimatorSmooth::didAddHorizontalScrollbar(Scrollbar*)	106	void ScrollAnimatorSmooth::didAddHorizontalScrollbar(Scrollbar* scrollbar)
102	{	107	{
		108	ScrollAnimator::didAddHorizontalScrollbar(scrollbar);
103	m_animation->updateVisibleLengths();	109	m_animation->updateVisibleLengths();
104	}	110	}
105		111

Lines 586-591 void RenderBox::setScrollTop(int newTop, ScrollClamping clamping) a/Source/WebCore/rendering/RenderBox.cpp_sec1
- a/Source/WebCore/rendering/RenderBox.cpp +10 lines
586	layer()->scrollToYPosition(newTop, clamping);	586	layer()->scrollToYPosition(newTop, clamping);
587	}	587	}
588		588
		589	#if ENABLE(CSSOM_SMOOTH_SCROLLING)
		590	void RenderBox::scrollToPositionWithAnimation(ScrollPosition scrollPosition, ScrollClamping clamping)
		591	{
		592	if (!hasOverflowClip() \|\| !layer())
		593	return;
		594	setupWheelEventTestTrigger(*layer());
		595	layer()->scrollToOffsetWithAnimation(scrollPosition, clamping);
		596	}
		597	#endif
		598
589	void RenderBox::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const	599	void RenderBox::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const
590	{	600	{
591	rects.append(snappedIntRect(accumulatedOffset, size()));	601	rects.append(snappedIntRect(accumulatedOffset, size()));