Bug 1173768 - Force TabsInTitlebar to re-update appearance after exiting fullscreen. r=Gijs

--HG--
extra : source : ef759f9c95e6837fd8fe15389ee3b20779676fb3

browser/base/content/browser-fullScreen.js

@@ -90,6 +90,12 @@ var FullScreen = {
       // This is needed if they use the context menu to quit fullscreen
       this._isPopupOpen = false;
       this.cleanup();
+      // In TabsInTitlebar._update(), we cancel the appearance update on
+      // resize event for exiting fullscreen, since that happens before we
+      // change the UI here in the "fullscreen" event. Hence we need to
+      // call it here to ensure the appearance is properly updated. See
+      // TabsInTitlebar._update() and bug 1173768.
+      TabsInTitlebar.updateAppearance(true);
     }
   },
 

browser/base/content/browser.js

@@ -5066,7 +5066,15 @@ var TabsInTitlebar = {
       if (this._lastSizeMode == sizemode) {
         return;
       }
+      let oldSizeMode = this._lastSizeMode;
       this._lastSizeMode = sizemode;
+      // Don't update right now if we are leaving fullscreen, since the UI is
+      // still changing in the consequent "fullscreen" event. Code there will
+      // call this function again when everything is ready.
+      // See browser-fullScreen.js: FullScreen.toggle and bug 1173768.
+      if (oldSizeMode == "fullscreen") {
+        return;
+      }
     }
 
     for (let something in this._disallowed) {