Consider shadow dom when dispatching events (#34788)

* Implement EventTarget::get_the_parent

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Add spec steps to Event::init_event

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Rewrite Event::composedPath to be spec compliant

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Retarget EventTargets instead of Nodes

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Rewrite event dispatch/invocation to better match the spec

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Add spec comments to Event struct

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Don't traverse shadow roots when calculating an events path

We can't do this correctly yet, and assuming that an events
composed flag is never set is correct 99% of the time.

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Fix typo in event dispatch

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* fix comment

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Update WPT expectations

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* allow crown error

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* fmt

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Reduce item visibility where possible

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Simplify code a bit

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Fix Step 5.10 of Event::invoke

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Fix renamed method calls

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

---------

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

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

@@ -1,6 +0,0 @@
-[Event-dispatch-click.html]
-  [event state during post-click handling]
-    expected: FAIL
-
-  [submit button should not activate if the event listener disables it]
-    expected: FAIL

tests/wpt/meta/dom/events/EventTarget-constructible.any.js.ini

@@ -1,8 +0,0 @@
-[EventTarget-constructible.any.worker.html]
-  [A constructed EventTarget implements dispatch correctly]
-    expected: FAIL
-
-
-[EventTarget-constructible.any.html]
-  [A constructed EventTarget implements dispatch correctly]
-    expected: FAIL

tests/wpt/meta/dom/events/event-global.html.ini

@@ -1,6 +1,7 @@
 [event-global.html]
+  expected: TIMEOUT
   [window.event is undefined if the target is in a shadow tree (event dispatched inside shadow tree)]
-    expected: FAIL
+    expected: TIMEOUT
 
   [window.event is undefined inside window.onerror if the target is in a shadow tree (ErrorEvent dispatched inside shadow tree)]
     expected: FAIL

tests/wpt/meta/shadow-dom/Extensions-to-Event-Interface.html.ini

@@ -1,7 +1,4 @@
 [Extensions-to-Event-Interface.html]
-  [composedPath() must return an empty array when the event is no longer dispatched]
-    expected: FAIL
-
   [composed on EventInit must default to false]
     expected: FAIL
 

tests/wpt/meta/shadow-dom/event-post-dispatch.html.ini

@@ -1,28 +1,13 @@
 [event-post-dispatch.html]
-  [Event properties post dispatch without ShadowRoots (composed: true).]
-    expected: FAIL
-
-  [Event properties post dispatch without ShadowRoots (composed: false).]
-    expected: FAIL
-
   [Event properties post dispatch with an open ShadowRoot (composed: true).]
     expected: FAIL
 
-  [Event properties post dispatch with an open ShadowRoot (composed: false).]
-    expected: FAIL
-
   [Event properties post dispatch with a closed ShadowRoot (composed: true).]
     expected: FAIL
 
-  [Event properties post dispatch with a closed ShadowRoot (composed: false).]
-    expected: FAIL
-
   [Event properties post dispatch with nested ShadowRoots (composed: true).]
     expected: FAIL
 
-  [Event properties post dispatch with nested ShadowRoots (composed: false).]
-    expected: FAIL
-
   [Event properties post dispatch with relatedTarget in the same shadow tree. (composed: true)]
     expected: FAIL
 
@@ -43,6 +28,3 @@
 
   [Event properties post dispatch when target get moved out of the shadow tree by event listener]
     expected: FAIL
-
-  [Event properties post dispatch when target get moved into the the shadow tree by event listener]
-    expected: FAIL