1 files changed, 64 insertions, 0 deletions
diff --git a/browser/fxr/content/fxr-fullScreen.js b/browser/fxr/content/fxr-fullScreen.js
new file mode 100644
index 0000000000..dd7a933d89
--- /dev/null
+++ b/browser/fxr/content/fxr-fullScreen.js
@@ -0,0 +1,64 @@
+/* -*- 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/. */
+
+// This file is loaded into the browser window scope.
+/* eslint-env mozilla/browser-window */
+
+// fxr-fullScreen.js is a provisional, stripped-down clone of
+//   browser\base\content\browser-fullScreenAndPointerLock.js
+// that is adapted for Firefox Reality on Desktop.
+// The bug to track its removal is
+//   Bug 1587946 - Rationalize the fork of browser-fullScreenAndPointerLock.js
+
+var FullScreen = {
+  init() {
+    // Called when the Firefox window go into fullscreen.
+    addEventListener("fullscreen", this, true);
+
+    if (window.fullScreen) {
+      this.toggle();
+    }
+  },
+
+  toggle() {
+    var enterFS = window.fullScreen;
+    if (enterFS) {
+      document.documentElement.setAttribute("inFullscreen", true);
+    } else {
+      document.documentElement.removeAttribute("inFullscreen");
+    }
+  },
+
+  handleEvent(event) {
+    if (event.type === "fullscreen") {
+      this.toggle();
+    }
+  },
+
+  enterDomFullscreen(aBrowser, aActor) {
+    if (!document.fullscreenElement) {
+      return;
+    }
+
+    // If it is a remote browser, send a message to ask the content
+    // to enter fullscreen state. We don't need to do so if it is an
+    // in-process browser, since all related document should have
+    // entered fullscreen state at this point.
+    // This should be done before the active tab check below to ensure
+    // that the content document handles the pending request. Doing so
+    // before the check is fine since we also check the activeness of
+    // the requesting document in content-side handling code.
+    if (aBrowser.isRemoteBrowser) {
+      aActor.sendAsyncMessage("DOMFullscreen:Entered", {});
+    }
+
+    document.documentElement.setAttribute("inDOMFullscreen", true);
+  },
+
+  cleanupDomFullscreen(aActor) {
+    aActor.sendAsyncMessage("DOMFullscreen:CleanUp", {});
+    document.documentElement.removeAttribute("inDOMFullscreen");
+  },
+};