1 files changed, 74 insertions, 0 deletions
diff --git a/mobile/android/chrome/geckoview/GeckoViewMediaControlChild.js b/mobile/android/chrome/geckoview/GeckoViewMediaControlChild.js
new file mode 100644
index 0000000000..e245eb1a5b
--- /dev/null
+++ b/mobile/android/chrome/geckoview/GeckoViewMediaControlChild.js
@@ -0,0 +1,74 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* 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/. */
+
+"use strict";
+
+const { GeckoViewChildModule } = ChromeUtils.import(
+  "resource://gre/modules/GeckoViewChildModule.jsm"
+);
+
+const { XPCOMUtils } = ChromeUtils.import(
+  "resource://gre/modules/XPCOMUtils.jsm"
+);
+
+XPCOMUtils.defineLazyModuleGetters(this, {
+  MediaUtils: "resource://gre/modules/MediaUtils.jsm",
+});
+
+class GeckoViewMediaControl extends GeckoViewChildModule {
+  onInit() {
+    debug`onEnable`;
+  }
+
+  onEnable() {
+    debug`onEnable`;
+
+    addEventListener("MozDOMFullscreen:Entered", this, false);
+    addEventListener("MozDOMFullscreen:Exited", this, false);
+  }
+
+  onDisable() {
+    debug`onDisable`;
+
+    removeEventListener("MozDOMFullscreen:Entered", this);
+    removeEventListener("MozDOMFullscreen:Exited", this);
+  }
+
+  handleEvent(aEvent) {
+    debug`handleEvent: ${aEvent.type}`;
+
+    switch (aEvent.type) {
+      case "MozDOMFullscreen:Entered":
+      case "MozDOMFullscreen:Exited":
+        this.handleFullscreenChanged();
+        break;
+    }
+  }
+
+  handleFullscreenChanged() {
+    debug`handleFullscreenChanged`;
+
+    const element = content && content.document.fullscreenElement;
+    const mediaElement = MediaUtils.findMediaElement(element);
+
+    if (element && !mediaElement) {
+      // Non-media element fullscreen.
+      debug`No fullscreen media element found.`;
+    }
+
+    const message = {
+      metadata: MediaUtils.getMetadata(mediaElement) ?? {},
+      enabled: !!element,
+    };
+
+    this.messageManager.sendAsyncMessage(
+      "GeckoView:MediaControl:Fullscreen",
+      message
+    );
+  }
+}
+
+const { debug } = GeckoViewMediaControl.initLogging("GeckoViewMediaControl");
+const module = GeckoViewMediaControl.create(this);