Bug 609685 - "Having opened panorama once in a window affects all rendering in that window, even in tabs that are opened later" [f=ian r=ian a=blocking]

browser/base/content/tabview/groupitems.js

@@ -1052,10 +1052,10 @@ GroupItem.prototype = Utils.extend(new Item(), new Subscribable(), {
       return: 'widthAndColumns',
       count: count || this._children.length
     };
-    let {childWidth, columns} = Items.arrange(null, bb, options);
-
-    let shouldStack = childWidth < TabItems.minTabWidth * 1.35;
-    this._columns = shouldStack ? null : columns;
+    let arrObj = Items.arrange(null, bb, options);
+ 
+    let shouldStack = arrObj.childWidth < TabItems.minTabWidth * 1.35;
+    this._columns = shouldStack ? null : arrObj.columns;
 
     return shouldStack;
   },
@@ -1646,6 +1646,7 @@ let GroupItems = {
   _arrangePaused: false,
   _arrangesPending: [],
   _removingHiddenGroups: false,
+  _delayedModUpdates: [],
   minGroupHeight: 110,
   minGroupWidth: 125,
 
@@ -1659,9 +1660,18 @@ let GroupItems = {
       self._handleAttrModified(xulTab);
     }
 
+    // make sure any closed tabs are removed from the delay update list
+    function handleClose(xulTab) {
+      let idx = self._delayedModUpdates.indexOf(xulTab);
+      if (idx != -1)
+        self._delayedModUpdates.splice(idx, 1);
+    }
+
     AllTabs.register("attrModified", handleAttrModified);
+    AllTabs.register("close", handleClose);
     this._cleanupFunctions.push(function() {
       AllTabs.unregister("attrModified", handleAttrModified);
+      AllTabs.unregister("close", handleClose);
     });
   },
 
@@ -1728,6 +1738,30 @@ let GroupItems = {
   // Function: _handleAttrModified
   // watch for icon changes on app tabs
   _handleAttrModified: function GroupItems__handleAttrModified(xulTab) {
+    if (!UI.isTabViewVisible()) {
+      if (this._delayedModUpdates.indexOf(xulTab) == -1) {
+        this._delayedModUpdates.push(xulTab);
+      }
+    } else
+      this._updateAppTabIcons(xulTab); 
+  },
+
+  // ----------
+  // Function: flushTabUpdates
+  // Update apptab icons based on xulTabs which have been updated
+  // while the TabView hasn't been visible 
+  flushAppTabUpdates: function GroupItems_flushAppTabUpdates() {
+    let self = this;
+    this._delayedModUpdates.forEach(function(xulTab) {
+      self._updateAppTabIcons(xulTab);
+    });
+    this._delayedModUpdates = [];
+  },
+
+  // ----------
+  // Function: _updateAppTabIcons
+  // Update images of any apptab icons that point to passed in xultab 
+  _updateAppTabIcons: function GroupItems__updateAppTabIcons(xulTab) {
     if (xulTab.ownerDocument.defaultView != gWindow || !xulTab.pinned)
       return;
 
@@ -1742,7 +1776,7 @@ let GroupItems = {
           $icon.attr("src", iconUrl);
       });
     });
-  },
+  },  
 
   // ----------
   // Function: addAppTab

browser/base/content/tabview/tabitems.js

@@ -900,12 +900,9 @@ let TabItems = {
         Date.now() - this._lastUpdateTime < this._heartbeatTiming
       );
 
-      let isCurrentTab = (
-        !UI.isTabViewVisible() &&
-        tab == gBrowser.selectedTab
-      );
-
-      if (shouldDefer && !isCurrentTab) {
+      if (shouldDefer) {
+        if (!this.reconnectingPaused() && !tab._tabViewTabItem._reconnected)
+          this._reconnect(tab._tabViewTabItem);          
         if (this._tabsWaitingForUpdate.indexOf(tab) == -1)
           this._tabsWaitingForUpdate.push(tab);
         this.startHeartbeat();
@@ -1297,7 +1294,9 @@ TabCanvas.prototype = {
       ctx.save();
       ctx.scale(scaler, scaler);
       try{
-        ctx.drawWindow(fromWin, fromWin.scrollX, fromWin.scrollY, w/scaler, h/scaler, "#fff");
+        ctx.drawWindow(fromWin, fromWin.scrollX, fromWin.scrollY, 
+          w/scaler, h/scaler, "#fff",
+          Ci.nsIDOMCanvasRenderingContext2D.DRAWWINDOW_DO_NOT_FLUSH);
       } catch(e) {
         Utils.error('paint', e);
       }

browser/base/content/tabview/ui.js

@@ -500,6 +500,9 @@ let UI = {
         self._resize(true);
         dispatchEvent(event);
 
+        // Flush pending updates
+        GroupItems.flushAppTabUpdates();
+
         TabItems.resumePainting();
       });
     } else {
@@ -509,6 +512,9 @@ let UI = {
       self.setActiveTab(null);
       dispatchEvent(event);
 
+      // Flush pending updates
+      GroupItems.flushAppTabUpdates();
+
       TabItems.resumePainting();
     }
   },