script: Rename DebuggerEvent to DebuggerAddDebuggeeEvent (#38571)

the next debugger script event, `getPossibleBreakpoints` (#37667), will
contain a single attribute `unsigned long spidermonkeyId`, so it will
have nothing in common with `addDebuggee`. this patch renames the latter
accordingly.

Testing: no behaviour changes other than the rename, so no tests needed
Fixes: part of #36027

Signed-off-by: Delan Azabani <dazabani@igalia.com>

components/script/dom/debuggeradddebuggeeevent.rs

@@ -0,0 +1,76 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use std::ptr::NonNull;
+
+use dom_struct::dom_struct;
+use js::jsapi::{JSObject, Value};
+use script_bindings::conversions::SafeToJSValConvertible;
+use script_bindings::reflector::DomObject;
+use script_bindings::str::DOMString;
+
+use crate::dom::bindings::codegen::Bindings::DebuggerAddDebuggeeEventBinding::DebuggerAddDebuggeeEventMethods;
+use crate::dom::bindings::codegen::Bindings::EventBinding::Event_Binding::EventMethods;
+use crate::dom::bindings::reflector::reflect_dom_object;
+use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::event::Event;
+use crate::dom::types::{GlobalScope, PipelineId};
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+/// Event for Rust → JS calls in [`crate::dom::DebuggerGlobalScope`].
+pub(crate) struct DebuggerAddDebuggeeEvent {
+    event: Event,
+    global: Dom<GlobalScope>,
+    pipeline_id: Dom<PipelineId>,
+    worker_id: Option<DOMString>,
+}
+
+impl DebuggerAddDebuggeeEvent {
+    pub(crate) fn new(
+        debugger_global: &GlobalScope,
+        global: &GlobalScope,
+        pipeline_id: &PipelineId,
+        worker_id: Option<DOMString>,
+        can_gc: CanGc,
+    ) -> DomRoot<Self> {
+        let result = Box::new(Self {
+            event: Event::new_inherited(),
+            global: Dom::from_ref(global),
+            pipeline_id: Dom::from_ref(pipeline_id),
+            worker_id,
+        });
+        let result = reflect_dom_object(result, debugger_global, can_gc);
+        result.event.init_event("addDebuggee".into(), false, false);
+
+        result
+    }
+}
+
+impl DebuggerAddDebuggeeEventMethods<crate::DomTypeHolder> for DebuggerAddDebuggeeEvent {
+    // check-tidy: no specs after this line
+    fn Global(&self, cx: script_bindings::script_runtime::JSContext) -> NonNull<JSObject> {
+        // Convert the debuggee global’s reflector to a Value, wrapping it from its originating realm (debuggee realm)
+        // into the active realm (debugger realm) so that it can be passed across compartments.
+        rooted!(in(*cx) let mut result: Value);
+        self.global
+            .reflector()
+            .safe_to_jsval(cx, result.handle_mut());
+        NonNull::new(result.to_object()).unwrap()
+    }
+
+    fn PipelineId(
+        &self,
+    ) -> DomRoot<<crate::DomTypeHolder as script_bindings::DomTypes>::PipelineId> {
+        DomRoot::from_ref(&self.pipeline_id)
+    }
+
+    fn GetWorkerId(&self) -> Option<DOMString> {
+        self.worker_id.clone()
+    }
+
+    fn IsTrusted(&self) -> bool {
+        self.event.IsTrusted()
+    }
+}