1 files changed, 75 insertions, 0 deletions
diff --git a/mobile/android/actors/ContentDelegateParent.sys.mjs b/mobile/android/actors/ContentDelegateParent.sys.mjs
new file mode 100644
index 0000000000..d621c80104
--- /dev/null
+++ b/mobile/android/actors/ContentDelegateParent.sys.mjs
@@ -0,0 +1,75 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+import { GeckoViewUtils } from "resource://gre/modules/GeckoViewUtils.sys.mjs";
+import { GeckoViewActorParent } from "resource://gre/modules/GeckoViewActorParent.sys.mjs";
+
+const { debug, warn } = GeckoViewUtils.initLogging("ContentDelegateParent");
+
+export class ContentDelegateParent extends GeckoViewActorParent {
+  didDestroy() {
+    this._didDestroy = true;
+  }
+
+  async receiveMessage(aMsg) {
+    debug`receiveMessage: ${aMsg.name}`;
+
+    switch (aMsg.name) {
+      case "GeckoView:DOMFullscreenExit": {
+        if (!this.#hasBeenDestroyed() && !this.#requestOrigin) {
+          this.#requestOrigin = this;
+        }
+        this.window.windowUtils.remoteFrameFullscreenReverted();
+        return null;
+      }
+
+      case "GeckoView:DOMFullscreenRequest": {
+        this.#requestOrigin = this;
+        this.window.windowUtils.remoteFrameFullscreenChanged(this.browser);
+        return null;
+      }
+    }
+
+    return super.receiveMessage(aMsg);
+  }
+
+  // This is a copy of browser/actors/DOMFullscreenParent.sys.mjs
+  get #requestOrigin() {
+    const chromeBC = this.browsingContext.topChromeWindow?.browsingContext;
+    const requestOrigin = chromeBC?.fullscreenRequestOrigin;
+    return requestOrigin && requestOrigin.get();
+  }
+
+  // This is a copy of browser/actors/DOMFullscreenParent.sys.mjs
+  set #requestOrigin(aActor) {
+    const chromeBC = this.browsingContext.topChromeWindow?.browsingContext;
+    if (!chromeBC) {
+      debug`not able to get browsingContext for chrome window.`;
+      return;
+    }
+
+    if (aActor) {
+      chromeBC.fullscreenRequestOrigin = Cu.getWeakReference(aActor);
+      return;
+    }
+    delete chromeBC.fullscreenRequestOrigin;
+  }
+
+  // This is a copy of browser/actors/DOMFullscreenParent.sys.mjs
+  #hasBeenDestroyed() {
+    if (this._didDestroy) {
+      return true;
+    }
+
+    // The 'didDestroy' callback is not always getting called.
+    // So we can't rely on it here. Instead, we will try to access
+    // the browsing context to judge wether the actor has
+    // been destroyed or not.
+    try {
+      return !this.browsingContext;
+    } catch {
+      return true;
+    }
+  }
+}