Auto merge of #24144 - stephenmuss:event-src-element, r=jdm

Event src element

<!-- Please describe your changes on the following line: -->
This builds on top of the work done in https://github.com/servo/servo/pull/22918

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #22880
- [X] There are tests for these changes
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components/script/dom/event.rs

@@ -263,6 +263,11 @@ impl EventMethods for Event {
         self.target.get()
     }
 
+    // https://dom.spec.whatwg.org/#dom-event-srcelement
+    fn GetSrcElement(&self) -> Option<DomRoot<EventTarget>> {
+        self.target.get()
+    }
+
     // https://dom.spec.whatwg.org/#dom-event-currenttarget
     fn GetCurrentTarget(&self) -> Option<DomRoot<EventTarget>> {
         self.current_target.get()

components/script/dom/webidls/Event.webidl

@@ -11,6 +11,7 @@ interface Event {
   [Pure]
   readonly attribute DOMString type;
   readonly attribute EventTarget? target;
+  readonly attribute EventTarget? srcElement;
   readonly attribute EventTarget? currentTarget;
 
   const unsigned short NONE = 0;

tests/wpt/metadata/dom/events/Event-constructors.html.ini

@@ -1,7 +0,0 @@
-[Event-constructors.html]
-  [Event constructors 2]
-    expected: FAIL
-
-  [Event constructors 3]
-    expected: FAIL
-

tests/wpt/metadata/dom/events/Event-defaultPrevented-after-dispatch.html.ini

@@ -1,7 +0,0 @@
-[Event-defaultPrevented-after-dispatch.html]
-  [Default prevention via preventDefault]
-    expected: FAIL
-
-  [Default prevention via returnValue]
-    expected: FAIL
-

tests/wpt/metadata/dom/events/Event-dispatch-detached-click.html.ini

@@ -1,4 +0,0 @@
-[Event-dispatch-detached-click.html]
-  [Click event can be dispatched to an element that is not in the document.]
-    expected: FAIL
-

tests/wpt/metadata/dom/events/Event-dispatch-other-document.html.ini

@@ -1,4 +0,0 @@
-[Event-dispatch-other-document.html]
-  [Custom event on an element in another document]
-    expected: FAIL
-

tests/wpt/metadata/dom/events/Event-initEvent.html.ini

@@ -1,15 +0,0 @@
-[Event-initEvent.html]
-  type: testharness
-
-  [Properties of initEvent(type, true, true)]
-    expected: FAIL
-
-  [Properties of initEvent(type, true, false)]
-    expected: FAIL
-
-  [Properties of initEvent(type, false, true)]
-    expected: FAIL
-
-  [Properties of initEvent(type, false, false)]
-    expected: FAIL
-

tests/wpt/metadata/dom/events/EventListener-handleEvent.html.ini

@@ -5,12 +5,8 @@
   [throws if `handleEvent` is not callable]
     expected: FAIL
 
-  [calls `handleEvent` method of `EventListener`]
-    expected: FAIL
-
   [throws if `handleEvent` is falsy and not callable]
     expected: FAIL
 
   [throws if `handleEvent` is thruthy and not callable]
     expected: FAIL
-

tests/wpt/metadata/dom/idlharness.any.js.ini

@@ -2,9 +2,6 @@
   [AbortController interface: existence and properties of interface prototype object's @@unscopables property]
     expected: FAIL
 
-  [Event interface: new CustomEvent("foo") must inherit property "srcElement" with the proper type]
-    expected: FAIL
-
   [Event interface: new Event("foo") must inherit property "composed" with the proper type]
     expected: FAIL
 
@@ -20,9 +17,6 @@
   [AbortController interface object name]
     expected: FAIL
 
-  [Event interface: new Event("foo") must inherit property "srcElement" with the proper type]
-    expected: FAIL
-
   [Event interface: attribute composed]
     expected: FAIL
 
@@ -47,9 +41,6 @@
   [EventTarget interface: new AbortController().signal must inherit property "dispatchEvent(Event)" with the proper type]
     expected: FAIL
 
-  [Event interface: attribute srcElement]
-    expected: FAIL
-
   [EventTarget interface: calling addEventListener(DOMString, EventListener, [object Object\],[object Object\]) on new AbortController().signal with too few arguments must throw TypeError]
     expected: FAIL
 

tests/wpt/metadata/dom/idlharness.window.js.ini

@@ -199,9 +199,6 @@
 
 
 [idlharness.window.html?exclude=Node]
-  [Event interface: new CustomEvent("foo") must inherit property "srcElement" with the proper type]
-    expected: FAIL
-
   [EventTarget interface: new AbortController().signal must inherit property "addEventListener(DOMString, EventListener, [object Object\],[object Object\])" with the proper type]
     expected: FAIL
 
@@ -331,9 +328,6 @@
   [AbstractRange interface: attribute endContainer]
     expected: FAIL
 
-  [Event interface: new Event("foo") must inherit property "srcElement" with the proper type]
-    expected: FAIL
-
   [AbortController must be primary interface of new AbortController()]
     expected: FAIL
 
@@ -346,9 +340,6 @@
   [CharacterData interface: operation remove()]
     expected: FAIL
 
-  [Event interface: attribute srcElement]
-    expected: FAIL
-
   [Range interface: existence and properties of interface object]
     expected: FAIL
 
@@ -532,9 +523,6 @@
   [Attr interface: existence and properties of interface prototype object]
     expected: FAIL
 
-  [Event interface: document.createEvent("Event") must inherit property "srcElement" with the proper type]
-    expected: FAIL
-
   [Element interface: operation replaceWith([object Object\],[object Object\])]
     expected: FAIL
 

tests/wpt/metadata/dom/interfaces.html.ini

@@ -827,27 +827,18 @@
   [DOM IDL tests]
     expected: FAIL
 
-  [Event interface: attribute srcElement]
-    expected: FAIL
-
   [Event interface: operation composedPath()]
     expected: FAIL
 
   [Event interface: attribute composed]
     expected: FAIL
 
-  [Event interface: document.createEvent("Event") must inherit property "srcElement" with the proper type]
-    expected: FAIL
-
   [Event interface: document.createEvent("Event") must inherit property "composedPath()" with the proper type]
     expected: FAIL
 
   [Event interface: document.createEvent("Event") must inherit property "composed" with the proper type]
     expected: FAIL
 
-  [Event interface: new Event("foo") must inherit property "srcElement" with the proper type]
-    expected: FAIL
-
   [Event interface: new Event("foo") must inherit property "composedPath()" with the proper type]
     expected: FAIL
 
@@ -857,9 +848,6 @@
   [CustomEvent interface: operation initCustomEvent(DOMString, boolean, boolean, any)]
     expected: FAIL
 
-  [Event interface: new CustomEvent("foo") must inherit property "srcElement" with the proper type]
-    expected: FAIL
-
   [Event interface: new CustomEvent("foo") must inherit property "composedPath()" with the proper type]
     expected: FAIL