Add initial implementation of the unprefixed fullscreen API

https://bugs.webkit.org/show_bug.cgi?id=246103

Reviewed by Tim Nguyen.

Add initial implementation of the unprefixed fullscreen API:
- https://fullscreen.spec.whatwg.org/#api

The feature is behind an experimental feature flag, off by default.

This is needed to unblock the WPT testing of the screen orientation API since
screen orientation locking requires being in fullscreen.

* LayoutTests/TestExpectations:
* LayoutTests/imported/w3c/web-platform-tests/html/capability-delegation/delegate-fullscreen-request-popup-same-origin.https.tentative-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/html/capability-delegation/delegate-fullscreen-request-subframe-same-origin.https.tentative-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/html/dom/idlharness.https-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/screen-orientation/active-lock-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/screen-orientation/event-before-promise-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/screen-orientation/lock-basic-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/screen-orientation/lock-sandboxed-iframe-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/screen-orientation/lock-unlock-check-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/screen-orientation/onchange-event-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/screen-orientation/onchange-event-subframe-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/screen-orientation/orientation-reading-expected.txt:
* Source/WTF/Scripts/Preferences/WebPreferencesExperimental.yaml:
* Source/WebCore/dom/Element+Fullscreen.idl:
* Source/WebCore/dom/Element.cpp:
(WebCore::Element::requestFullscreen):
* Source/WebCore/dom/Element.h:
* Source/WebCore/dom/EventNames.h:
* Source/WebCore/dom/FullscreenManager.cpp:
(WebCore::FullscreenManager::dispatchFullscreenChangeEvents):
* Source/WebCore/html/HTMLAttributeNames.in:

Canonical link: https://commits.webkit.org/255317@main

LayoutTests/TestExpectations

@@ -448,6 +448,7 @@ imported/w3c/web-platform-tests/html/browsers/origin/cross-origin-objects/cross-
 imported/w3c/web-platform-tests/html/browsers/sandboxing/sandbox-disallow-popups.html [ DumpJSConsoleLogInStdErr ]
 imported/w3c/web-platform-tests/html/browsers/windows/clear-window-name.https.html [ DumpJSConsoleLogInStdErr ]
 imported/w3c/web-platform-tests/html/cross-origin-embedder-policy/blob.https.html [ DumpJSConsoleLogInStdErr ]
+imported/w3c/web-platform-tests/html/capability-delegation/delegate-fullscreen-request-popup-same-origin.https.tentative.html [ DumpJSConsoleLogInStdErr ]
 imported/w3c/web-platform-tests/html/cross-origin-embedder-policy/multi-globals/workers-coep-report.https.html [ DumpJSConsoleLogInStdErr ]
 imported/w3c/web-platform-tests/html/cross-origin-embedder-policy/reporting-navigation.https.html [ DumpJSConsoleLogInStdErr ]
 imported/w3c/web-platform-tests/html/cross-origin-embedder-policy/reporting-subresource-corp.https.html [ DumpJSConsoleLogInStdErr ]
@@ -612,6 +613,7 @@ imported/w3c/web-platform-tests/feature-policy/picture-in-picture-allowed-by-fea
 imported/w3c/web-platform-tests/feature-policy/picture-in-picture-default-feature-policy.https.sub.html [ Skip ]
 imported/w3c/web-platform-tests/feature-policy/picture-in-picture-disabled-by-feature-policy.https.sub.html [ Skip ]
 imported/w3c/web-platform-tests/feature-policy/policy-extends-to-sandbox.html [ Skip ]
+imported/w3c/web-platform-tests/feature-policy/reporting/fullscreen-reporting.html [ Skip ]
 imported/w3c/web-platform-tests/feature-policy/reporting/geolocation-reporting.https.html [ Skip ]
 imported/w3c/web-platform-tests/feature-policy/reporting/screen-wake-lock-reporting.https.html [ Skip ]
 imported/w3c/web-platform-tests/fullscreen/api/fullscreen-display-contents.html [ Skip ]
@@ -715,7 +717,6 @@ imported/w3c/web-platform-tests/html/rendering/replaced-elements/svg-inline-sizi
 imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe_navigate_ancestor-1.sub.html [ Skip ]
 imported/w3c/web-platform-tests/html/semantics/forms/historical-search-event.html [ Skip ]
 imported/w3c/web-platform-tests/html/semantics/interactive-elements/the-summary-element/anchor-with-inline-element.html [ Skip ]
-imported/w3c/web-platform-tests/screen-orientation/lock-sandboxed-iframe.html [ Skip ]
 imported/w3c/web-platform-tests/service-workers/service-worker/same-site-cookies.https.html [ Skip ]
 imported/w3c/web-platform-tests/workers/interfaces/WorkerGlobalScope/onerror/message-module-Error.html [ Skip ]
 [ Debug ] imported/w3c/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-svg.html [ Skip ]

LayoutTests/imported/w3c/web-platform-tests/dom/idlharness.window-expected.txt

@@ -342,7 +342,7 @@ PASS Document interface object length
 PASS Document interface object name
 PASS Document interface: existence and properties of interface prototype object
 PASS Document interface: existence and properties of interface prototype object's "constructor" property
-PASS Document interface: existence and properties of interface prototype object's @@unscopables property
+FAIL Document interface: existence and properties of interface prototype object's @@unscopables property assert_not_equals: Document.prototype[Symbol.unscopables] has unexpected property "fullscreen" got disallowed value -1
 PASS Document interface: attribute implementation
 PASS Document interface: attribute URL
 PASS Document interface: attribute documentURI

LayoutTests/imported/w3c/web-platform-tests/feature-policy/reporting/fullscreen-reporting-expected.txt

@@ -1,3 +1,5 @@
 
-FAIL Fullscreen Report Format document.getElementById('fs').requestFullscreen is not a function. (In 'document.getElementById('fs').requestFullscreen()', 'document.getElementById('fs').requestFullscreen' is undefined)
+Harness Error (TIMEOUT), message = null
+
+TIMEOUT Fullscreen Report Format Test timed out
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/document-exit-fullscreen-active-document-expected.txt

@@ -1,3 +1,3 @@
 
-FAIL Document#exitFullscreen() when the document is not the active document documentBeforeNav.exitFullscreen is not a function. (In 'documentBeforeNav.exitFullscreen()', 'documentBeforeNav.exitFullscreen' is undefined)
+PASS Document#exitFullscreen() when the document is not the active document
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/document-exit-fullscreen-nested-shadow-dom-expected.txt

@@ -1,11 +1,17 @@
-CONSOLE MESSAGE: Unhandled Promise Rejection: TypeError: outer.requestFullscreen is not a function. (In 'outer.requestFullscreen()', 'outer.requestFullscreen' is undefined)
+CONSOLE MESSAGE: Unhandled Promise Rejection: Error: assert_equals: expected Element node <div id="outer">
+      <slot></slot>
+    </div> but got null
 fullscreen
 
-Harness Error (FAIL), message = Unhandled rejection: outer.requestFullscreen is not a function. (In 'outer.requestFullscreen()', 'outer.requestFullscreen' is undefined)
+Harness Error (FAIL), message = Unhandled rejection: assert_equals: expected Element node <div id="outer">
+      <slot></slot>
+    </div> but got null
 
 TIMEOUT Exiting fullscreen from a nested shadow root works correctly. Test timed out
 
-Harness Error (FAIL), message = Unhandled rejection: outer.requestFullscreen is not a function. (In 'outer.requestFullscreen()', 'outer.requestFullscreen' is undefined)
+Harness Error (FAIL), message = Unhandled rejection: assert_equals: expected Element node <div id="outer">
+      <slot></slot>
+    </div> but got null
 
 TIMEOUT Exiting fullscreen from a nested shadow root works correctly. Test timed out
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/document-fullscreen-enabled-active-document-expected.txt

@@ -1,3 +1,3 @@
 
-FAIL Document#fullscreenEnabled when the document is not the active document assert_false: expected false got undefined
+PASS Document#fullscreenEnabled when the document is not the active document
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/document-fullscreen-enabled-cross-origin.sub-expected.txt

@@ -3,8 +3,8 @@ Blocked access to external URL http://www1.localhost:8800/fullscreen/api/resourc
 
 Harness Error (TIMEOUT), message = null
 
-FAIL Fullscreen enabled test: same-origin-default assert_equals: same-origin-default frame fullscreenEnabled expected (boolean) true but got (undefined) undefined
-FAIL Fullscreen enabled test: same-origin-allow assert_equals: same-origin-allow frame fullscreenEnabled expected (boolean) true but got (undefined) undefined
+PASS Fullscreen enabled test: same-origin-default
+PASS Fullscreen enabled test: same-origin-allow
 NOTRUN Fullscreen enabled test: cross-origin-default
 NOTRUN Fullscreen enabled test: cross-origin-allow
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/document-fullscreen-enabled-expected.txt

@@ -1,3 +1,3 @@
 
-FAIL Document#fullscreenEnabled assert_true: top-level document expected true got undefined
+PASS Document#fullscreenEnabled
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/document-onfullscreenerror-expected.txt

@@ -1,3 +1,3 @@
 
-FAIL Document#onfullscreenerror assert_equals: initial onfullscreenerror expected (object) null but got (undefined) undefined
+PASS Document#onfullscreenerror
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/element-request-fullscreen-active-document-expected.txt

@@ -1,3 +1,3 @@
 
-FAIL Element#requestFullscreen() when the document is not the active document documentBeforeNav.documentElement.requestFullscreen is not a function. (In 'documentBeforeNav.documentElement.requestFullscreen()', 'documentBeforeNav.documentElement.requestFullscreen' is undefined)
+PASS Element#requestFullscreen() when the document is not the active document
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/element-request-fullscreen-dialog-expected.txt

@@ -1,10 +1,3 @@
-CONSOLE MESSAGE: Unhandled Promise Rejection: TypeError: dialog.requestFullscreen is not a function. (In 'dialog.requestFullscreen()', 'dialog.requestFullscreen' is undefined)
 
-Harness Error (FAIL), message = Unhandled rejection: dialog.requestFullscreen is not a function. (In 'dialog.requestFullscreen()', 'dialog.requestFullscreen' is undefined)
-
-TIMEOUT Element#requestFullscreen() for dialog element Test timed out
-
-Harness Error (FAIL), message = Unhandled rejection: dialog.requestFullscreen is not a function. (In 'dialog.requestFullscreen()', 'dialog.requestFullscreen' is undefined)
-
-TIMEOUT Element#requestFullscreen() for dialog element Test timed out
+FAIL Element#requestFullscreen() for dialog element assert_unreached: fullscreenchange event Reached unreachable code
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/element-request-fullscreen-expected.txt

@@ -1,5 +1,3 @@
 
-Harness Error (FAIL), message = Test named 'Element#requestFullscreen()' specified 1 'cleanup' function, and 1 failed.
-
-FAIL Element#requestFullscreen() assert_unreached: TypeError: div.requestFullscreen is not a function. (In 'div.requestFullscreen()', 'div.requestFullscreen' is undefined) Reached unreachable code
+PASS Element#requestFullscreen()
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/element-request-fullscreen-not-allowed-expected.txt

@@ -1,3 +1,3 @@
 
-FAIL Element#requestFullscreen() when not allowed to request fullscreen div.requestFullscreen is not a function. (In 'div.requestFullscreen()', 'div.requestFullscreen' is undefined)
+PASS Element#requestFullscreen() when not allowed to request fullscreen
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/element-request-fullscreen-options-expected.txt

@@ -1,5 +1,3 @@
 
-FAIL Element#requestFullscreen({ navigationUI }) support document.body.requestFullscreen is not a function. (In 'document.body.requestFullscreen({
-    get navigationUI() { invoked = true; return "irrelevant-value"; }
-  })', 'document.body.requestFullscreen' is undefined)
+PASS Element#requestFullscreen({ navigationUI }) support
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/api/promises-reject-expected.txt

@@ -1,4 +1,4 @@
 
-FAIL Promises#reject e.requestFullscreen is not a function. (In 'e.requestFullscreen()', 'e.requestFullscreen' is undefined)
-FAIL Promises#reject 1 document.exitFullscreen is not a function. (In 'document.exitFullscreen()', 'document.exitFullscreen' is undefined)
+PASS Promises#reject
+PASS Promises#reject 1
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/idlharness.window-expected.txt

@@ -22,24 +22,24 @@ PASS Element includes Slottable: member names are unique
 PASS Document includes XPathEvaluatorBase: member names are unique
 PASS Document includes GlobalEventHandlers: member names are unique
 PASS Document includes DocumentAndElementEventHandlers: member names are unique
-FAIL Document interface: attribute fullscreenEnabled assert_true: The prototype object must have a property "fullscreenEnabled" expected true got false
-FAIL Document interface: attribute fullscreen assert_equals: Document.prototype[Symbol.unscopables].fullscreen must exist expected "object" but got "undefined"
-FAIL Document interface: operation exitFullscreen() assert_own_property: interface prototype object missing non-static operation expected property "exitFullscreen" missing
-FAIL Document interface: attribute onfullscreenchange assert_true: The prototype object must have a property "onfullscreenchange" expected true got false
-FAIL Document interface: attribute onfullscreenerror assert_true: The prototype object must have a property "onfullscreenerror" expected true got false
-FAIL Document interface: attribute fullscreenElement assert_true: The prototype object must have a property "fullscreenElement" expected true got false
-FAIL Document interface: new Document must inherit property "fullscreenEnabled" with the proper type assert_inherits: property "fullscreenEnabled" not found in prototype chain
-FAIL Document interface: new Document must inherit property "fullscreen" with the proper type assert_inherits: property "fullscreen" not found in prototype chain
-FAIL Document interface: new Document must inherit property "exitFullscreen()" with the proper type assert_inherits: property "exitFullscreen" not found in prototype chain
-FAIL Document interface: new Document must inherit property "onfullscreenchange" with the proper type assert_inherits: property "onfullscreenchange" not found in prototype chain
-FAIL Document interface: new Document must inherit property "onfullscreenerror" with the proper type assert_inherits: property "onfullscreenerror" not found in prototype chain
-FAIL Document interface: new Document must inherit property "fullscreenElement" with the proper type assert_inherits: property "fullscreenElement" not found in prototype chain
-FAIL ShadowRoot interface: attribute fullscreenElement assert_true: The prototype object must have a property "fullscreenElement" expected true got false
-FAIL Element interface: operation requestFullscreen(optional FullscreenOptions) assert_own_property: interface prototype object missing non-static operation expected property "requestFullscreen" missing
-FAIL Element interface: attribute onfullscreenchange assert_true: The prototype object must have a property "onfullscreenchange" expected true got false
-FAIL Element interface: attribute onfullscreenerror assert_true: The prototype object must have a property "onfullscreenerror" expected true got false
-FAIL Element interface: document.createElementNS(null, "test") must inherit property "requestFullscreen(optional FullscreenOptions)" with the proper type assert_inherits: property "requestFullscreen" not found in prototype chain
-FAIL Element interface: calling requestFullscreen(optional FullscreenOptions) on document.createElementNS(null, "test") with too few arguments must throw TypeError assert_inherits: property "requestFullscreen" not found in prototype chain
-FAIL Element interface: document.createElementNS(null, "test") must inherit property "onfullscreenchange" with the proper type assert_inherits: property "onfullscreenchange" not found in prototype chain
-FAIL Element interface: document.createElementNS(null, "test") must inherit property "onfullscreenerror" with the proper type assert_inherits: property "onfullscreenerror" not found in prototype chain
+FAIL Document interface: attribute fullscreenEnabled assert_equals: setter must be function for PutForwards, Replaceable, or non-readonly attributes expected "function" but got "undefined"
+FAIL Document interface: attribute fullscreen assert_equals: setter must be function for PutForwards, Replaceable, or non-readonly attributes expected "function" but got "undefined"
+PASS Document interface: operation exitFullscreen()
+PASS Document interface: attribute onfullscreenchange
+PASS Document interface: attribute onfullscreenerror
+FAIL Document interface: attribute fullscreenElement assert_equals: setter must be function for PutForwards, Replaceable, or non-readonly attributes expected "function" but got "undefined"
+PASS Document interface: new Document must inherit property "fullscreenEnabled" with the proper type
+PASS Document interface: new Document must inherit property "fullscreen" with the proper type
+PASS Document interface: new Document must inherit property "exitFullscreen()" with the proper type
+PASS Document interface: new Document must inherit property "onfullscreenchange" with the proper type
+PASS Document interface: new Document must inherit property "onfullscreenerror" with the proper type
+PASS Document interface: new Document must inherit property "fullscreenElement" with the proper type
+FAIL ShadowRoot interface: attribute fullscreenElement assert_equals: setter must be function for PutForwards, Replaceable, or non-readonly attributes expected "function" but got "undefined"
+PASS Element interface: operation requestFullscreen(optional FullscreenOptions)
+PASS Element interface: attribute onfullscreenchange
+PASS Element interface: attribute onfullscreenerror
+PASS Element interface: document.createElementNS(null, "test") must inherit property "requestFullscreen(optional FullscreenOptions)" with the proper type
+PASS Element interface: calling requestFullscreen(optional FullscreenOptions) on document.createElementNS(null, "test") with too few arguments must throw TypeError
+PASS Element interface: document.createElementNS(null, "test") must inherit property "onfullscreenchange" with the proper type
+PASS Element interface: document.createElementNS(null, "test") must inherit property "onfullscreenerror" with the proper type
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/rendering/fullscreen-css-invalidation-expected.txt

@@ -1,4 +1,4 @@
 Should be green
 
-FAIL Invalidate :fullscreen based style document.documentElement.requestFullscreen is not a function. (In 'document.documentElement.requestFullscreen()', 'document.documentElement.requestFullscreen' is undefined)
+FAIL Invalidate :fullscreen based style assert_equals: Green when :root is fullscreened. expected "rgb(0, 128, 0)" but got "rgb(255, 0, 0)"
 

LayoutTests/imported/w3c/web-platform-tests/fullscreen/rendering/fullscreen-css-transition-expected.txt

@@ -1,4 +1,4 @@
 Should be green
 
-FAIL Transitions should not be stopped by going fullscreen trans.requestFullscreen is not a function. (In 'trans.requestFullscreen()', 'trans.requestFullscreen' is undefined)
+PASS Transitions should not be stopped by going fullscreen
 

LayoutTests/imported/w3c/web-platform-tests/html/capability-delegation/delegate-fullscreen-request-popup-same-origin.https.tentative-expected.txt

@@ -1,9 +1,6 @@
-CONSOLE MESSAGE: TypeError: document.body.requestFullscreen is not a function. (In 'document.body.requestFullscreen()', 'document.body.requestFullscreen' is undefined)
 Verifies that element.requestFullscreen() calls from a same-origin popup without user activation work if and only if the opener has user activation and it delegates the capability. https://wicg.github.io/capability-delegation/spec.html
 
-Harness Error (TIMEOUT), message = null
-
-TIMEOUT Fullscreen requests from a same-origin popup fails without delegation from an opener with no user activation Test timed out
-NOTRUN Fullscreen requests from a same-origin popup fails without delegation from an opener with user activation
-NOTRUN Fullscreen requests from a same-origin popup succeeds with delegation from an opener with user activation
+PASS Fullscreen requests from a same-origin popup fails without delegation from an opener with no user activation
+PASS Fullscreen requests from a same-origin popup fails without delegation from an opener with user activation
+FAIL Fullscreen requests from a same-origin popup succeeds with delegation from an opener with user activation assert_equals: expected "success" but got "failure"
 

LayoutTests/imported/w3c/web-platform-tests/html/capability-delegation/delegate-fullscreen-request-subframe-same-origin.https.tentative-expected.txt

@@ -1,10 +1,8 @@
-CONSOLE MESSAGE: TypeError: document.body.requestFullscreen is not a function. (In 'document.body.requestFullscreen()', 'document.body.requestFullscreen' is undefined)
+CONSOLE MESSAGE: Unhandled Promise Rejection: TypeError: Type error
 Verifies that element.requestFullscreen() calls from a same-origin subframe without user activation work if and only if the top frame has user activation, regardless of whether it delegates the capability or not. https://wicg.github.io/capability-delegation/spec.html See wpt/html/user-activation/propagation*.html for frame tree user activation visibility tests.
 
 
-Harness Error (TIMEOUT), message = null
-
-TIMEOUT Fullscreen requests from a same-origin subframe fails without delegation from an opener with no user activation Test timed out
-NOTRUN Fullscreen requests from a same-origin subframe succeeds without delegation from an opener with user activation
-NOTRUN Fullscreen requests from a same-origin subframe succeeds with delegation from an opener with user activation
+PASS Fullscreen requests from a same-origin subframe fails without delegation from an opener with no user activation
+PASS Fullscreen requests from a same-origin subframe succeeds without delegation from an opener with user activation
+PASS Fullscreen requests from a same-origin subframe succeeds with delegation from an opener with user activation
 

LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allow-expected.txt

@@ -1,3 +1,4 @@
+CONSOLE MESSAGE: Feature policy 'Fullscreen' check failed for iframe with origin 'null' and allow attribute ''.
 
-FAIL iframe-cross-origin-allow assert_false: Document inside cross-origin iframe without allow attribute should not have feature enabled expected false got undefined
+FAIL iframe-cross-origin-allow assert_false: Feature should be denied when correct allow attribute is added, before reload expected false got true
 

LayoutTests/imported/w3c/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-allowfullscreen-expected.txt

@@ -1,6 +1,7 @@
+CONSOLE MESSAGE: Feature policy 'Fullscreen' check failed for iframe with origin 'null' and allow attribute ''.
 
-FAIL iframe-same-origin-allowfullscreen assert_true: Top level document has fullscreen enabled flag set expected true got undefined
-FAIL iframe-cross-origin-allowfullscreen assert_false: Document inside cross-origin iframe without allowfullscreen attribute should not have fullscreen enabled flag set expected false got undefined
-FAIL iframe-noload-noallowfullscreen assert_true: Fullscreen should still be enabled in same-origin document without allowfullscreen attribute expected true got undefined
-FAIL iframe-noload-allowfullscreen assert_true: Fullscreen should be enabled with allowfullscreen attribute expected true got undefined
+PASS iframe-same-origin-allowfullscreen
+FAIL iframe-cross-origin-allowfullscreen assert_false: Fullscreen should be denied when allowfullscreen attribute is added, before reload expected false got true
+PASS iframe-noload-noallowfullscreen
+PASS iframe-noload-allowfullscreen
 

LayoutTests/imported/w3c/web-platform-tests/html/user-activation/activation-trigger-mouse-right-expected.txt

@@ -4,5 +4,5 @@ Tests user activation from a mouse right-click.
 
 Right-click anywhere in the document.
 
-FAIL Activation through right-click mouse event assert_true: mousedown event should result in activation expected true got false
+FAIL Activation through right-click mouse event assert_false: mouseup should have no activation after mousedown consumption expected false got true