Issue 1965 - Simplified and fixed missing image for icon animation

background.js

Index: background.js
===================================================================
--- a/background.js
+++ b/background.js
@@ -100,25 +100,56 @@
 
 var activeNotification = null;
 
-// Adds or removes browser action icon according to options.
+function getTabStatus(tab)
+{
+  var whitelisted = isWhitelisted(tab.url);
+  var animated = iconAnimation.tabs.has(tab);
+
+  var icon;
+  if (require("info").platform == "safari")
+    // pick an icon with approtiate size for Safari. However since
+    // toolbar item icons can't use different colors, we don't have
+    // different versions indicating whether the page is whitelisted
+    icon = "icons/abp-16";
+  else
+  {
+    // pick an icon with the approtiate size for Chrome/Opera
+    // that indicates whether the page is whitelisted
+    if (whitelisted && (!animated || iconAnimation.step < 10))
+      icon = "icons/abp-19-whitelisted";
+    else
+      icon = "icons/abp-19";
+  }
+
+  // pick the current frame if the icon is currently animating
+  // in order to indicate a pending notification
+  if (animated && iconAnimation.step > 0)
+  {
+    icon += "-notification-" + iconAnimation.severity;
+
+    if (iconAnimation.step < 10)
+      icon += "-" + iconAnimation.step;
+  }
+
+  icon += ".png";
+
+  return {icon: icon, whitelisted: whitelisted};
+}
+
 function refreshIconAndContextMenu(tab)
 {
-  var whitelisted = isWhitelisted(tab.url);
+  var status = getTabStatus(tab);
 
-  var iconFilename;
-  if (require("info").platform == "safari")
-    // There is no grayscale version of the icon for whitelisted tabs
-    // when using Safari, because icons are grayscale already and icons
-    // aren't per tab in Safari.
-    iconFilename = "icons/abp-16.png"
-  else
-    iconFilename = whitelisted ? "icons/abp-19-whitelisted.png" : "icons/abp-19.png";
+  // update icon indicating whether the page is whitelisted.
+  // But don't interfere the icon animation if active.
+  // In that case the icon animation takes care to update
+  // the icon to its new status with its next frame.
+  if (!iconAnimation.tabs.has(tab))
+    tab.browserAction.setIcon(status.icon);
 
-  tab.browserAction.setIcon(iconFilename);
-  iconAnimation.registerTab(tab, iconFilename);
-
-  // Set context menu status according to whether current tab has whitelisted domain
-  if (whitelisted || !/^https?:/.test(tab.url))
+  // show or hide the context menu entry dependent on whether
+  // adblocking is active in that tab
+  if (status.whitelisted || !/^https?:/.test(tab.url))
     ext.contextMenus.hideMenuItems();
   else
     ext.contextMenus.showMenuItems();