Bug 1706164 - Share screen and window sharing status from webrtcUI via sharedData. r=mconley

Differential Revision: https://phabricator.services.mozilla.com/D115416

browser/modules/webrtcUI.jsm

@@ -466,6 +466,7 @@ var webrtcUI = {
       this.tabSwitchCountForSession = 0;
     }
 
+    this._setSharedData();
     if (
       Services.prefs.getBoolPref(
         "privacy.webrtc.allowSilencingNotifications",
@@ -507,6 +508,7 @@ var webrtcUI = {
     }
 
     this.updateGlobalIndicator();
+    this._setSharedData();
   },
 
   /**
@@ -902,6 +904,33 @@ var webrtcUI = {
       args
     );
   },
+
+  /**
+   * Updates the sharedData structure to reflect shared screen and window
+   * state. This sets the following key: data pairs on sharedData.
+   * - "webrtcUI:isSharingScreen": a boolean value reflecting
+   * this.sharingScreen.
+   * - "webrtcUI:sharedTopInnerWindowIds": a set containing the inner window
+   * ids of each top level browser window that is in sharedBrowserWindows.
+   */
+  _setSharedData() {
+    let sharedTopInnerWindowIds = new Set();
+    for (let win of BrowserWindowTracker.orderedWindows) {
+      if (this.sharedBrowserWindows.has(win)) {
+        sharedTopInnerWindowIds.add(
+          win.browsingContext.currentWindowGlobal.innerWindowId
+        );
+      }
+    }
+    Services.ppmm.sharedData.set(
+      "webrtcUI:isSharingScreen",
+      this.sharingScreen
+    );
+    Services.ppmm.sharedData.set(
+      "webrtcUI:sharedTopInnerWindowIds",
+      sharedTopInnerWindowIds
+    );
+  },
 };
 
 function getGlobalIndicator() {