Fixes 4218 - setIcon for older, fussy versions of Chrome

chrome/ext/background.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 152 matching lines @@
   chrome.tabs.onRemoved.addListener(forgetTab);
 
   chrome.tabs.onActivated.addListener(function(details)
   {
     ext.pages.onActivated._dispatch(new Page({id: details.tabId}));
   });
 
 
   /* Browser actions */
 
-  var supportedIconSizes = ["19", "38", "16", "32", "20", "40"];
-
   var BrowserAction = function(tabId)
   {
     this._tabId = tabId;
     this._changes = null;
   };
   BrowserAction.prototype = {
-    _safeChromeSetIcon: function(details)
+    _legacySetIcon: function(details)
+    {
+      var legacyDetails = {};
+      for (var key in details)
+      {
+        var value = details[key];
+        if (typeof value == "object")
+          value = {19: value[19], 38: value[38]};
+        legacyDetails[key] = value;
+      }
+      chrome.browserAction.setIcon(legacyDetails);
+    },
+    _safeSetIcon: function(details)
     {
       try
       {
         chrome.browserAction.setIcon(details);
       }
       catch (e)
       {
-        // Edge and newer versions of Chrome prefer different icon sizes, but
-        // older versions of Chrome cannot handle them being present!
-        supportedIconSizes.splice(2);
-
-        for (var key of ["path", "imageData"])
-        {
-          if (!(key in details))
-            continue;
-
-          for (var size in details[key])
-          {
-            if (details[key].hasOwnProperty(size) &&
-                supportedIconSizes.indexOf(size) == -1)
-              delete details[key][size];
+        // Older versions of Chrome do not allow any sizes other than 19 and 38
+        // to be present, but newer versions of Chrome (and Edge) prefer
+        // different sizes.
+        this._safeSetIcon = this._legacySetIcon;
+        this._legacySetIcon(details);
+      }
+    },
+    _applyChanges: function()
+    {
+      if ("iconPath" in this._changes)
+      {
+        this._safeSetIcon({
+          tabId: this._tabId,
+          path: {
+            16: this._changes.iconPath.replace("$size", "16"),
+            19: this._changes.iconPath.replace("$size", "19"),
+            20: this._changes.iconPath.replace("$size", "20"),
+            32: this._changes.iconPath.replace("$size", "32"),
+            38: this._changes.iconPath.replace("$size", "38"),
+            40: this._changes.iconPath.replace("$size", "40")
           }
-        };
-        chrome.browserAction.setIcon(details);
-      }
-    },
-    _applyChanges: function()
-    {
-      if ("iconPath" in this._changes)
-      {
-        var details = {tabId: this._tabId, path: {}};
-        for (var size of supportedIconSizes)
-          details.path[size] = this._changes.iconPath.replace("$size", size);
-        this._safeChromeSetIcon(details);
+        });
       }
 
       if ("badgeText" in this._changes)
       {
         chrome.browserAction.setBadgeText({
           tabId: this._tabId,
           text: this._changes.badgeText
         });
       }
 
@@ skipping 391 matching lines @@
   ext.windows = {
     create: function(createData, callback)
     {
       chrome.windows.create(createData, function(createdWindow)
       {
         afterTabLoaded(callback)(createdWindow.tabs[0]);
       });
     }
   };
 })();