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Gmail Favicon Alerts 3.1a — Chrome Support

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This is an alpha build of Gmail Favicon Alerts with support for Chrome. It's not perfect, but it's working for me, so I'd love it if you'd give it a try and let me know how it goes.

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  1. // ==UserScript==
  2. // @name           Gmail Favicon Alerts 3
  3. // @description    Alerts you to the status of your Gmail Inbox through distinct Favicons.
  4. // @version        3.1.1a
  5. // @date           2010-03-04
  6. // @author         Peter Wooley
  7. // @namespace      http://peterwooley.com
  8. // @include        https://mail.google.com/mail*
  9. // @include        http://mail.google.com/mail*
  10. // @include        https://mail.google.com/mail*
  11. // @include        http://mail.google.com/a*
  12. // @include        https://mail.google.com/a*
  13. // ==/UserScript==
  14.  
  15. if(!GM_getValue) {
  16. 	function GM_getValue(name, fallback) {
  17. 		return fallback;
  18. 	}
  19. }
  20.  
  21. // Register GM Commands and Methods
  22. if(!GM_registerMenuCommand) {
  23. 	GM_registerMenuCommand( "Gmail Favicon Alerts > Chat Alerts On", function() { setChat(true) } );
  24. 	GM_registerMenuCommand( "Gmail Favicon Alerts > Chat Alerts Off", function() { setChat(false) } );
  25. 	GM_registerMenuCommand( "Gmail Favicon Alerts > Unread Count On", function() { setUnreadCountDisplay(true) } );
  26. 	GM_registerMenuCommand( "Gmail Favicon Alerts > Unread Count Off", function() { setUnreadCountDisplay(false) } );
  27. 	function setChat(val) { GM_setValue('chatEnabled', val) };
  28. 	function setUnreadCountDisplay(val) { GM_setValue('unreadCountDisplay', val) };
  29. }
  30.  
  31. var gfia_instance;
  32. var gfia_chat = GM_getValue('chatEnabled', true);
  33.  
  34. if(window.frameElement && window.frameElement.id == "canvas_frame") {
  35. 	new GmailFavIconAlerts();
  36. }
  37.  
  38. function GmailFavIconAlerts() {
  39. 	var self = this;
  40. 	this.construct = function() {				
  41. 		this.chat = this.getChat();
  42. 		this.chatting = false;
  43. 		this.head = window.frameElement.parentNode.parentNode.getElementsByTagName('head')[0];
  44. 		this.title = this.head.getElementsByTagName('title')[0];
  45. 		this.inboxText = 'Inbox';
  46. 		this.chatText = [
  47. 							{value:'\u2026', chars: 1},
  48. 							{value:'...', chars: 3}
  49. 						];
  50. 		this.timer;
  51. 		this.icons = {
  52. 			chat: 'data:image/x-icon;base64,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',
  53. 			read:	'data:image/x-icon;base64,AAABAAEAEBAAAAEAIABoBAAAFgAAACgAAAAQAAAAIAAAAAEAIAAAAAAAAAAAACMuAAAjLgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA0Wsv8NFrL/gYGu/4GBrv+Bga7/gYGu/4GBrv+Bga7/gYGu/4GBrv+Bga7/gYGu/4GBrv+Bga7/DRay/w0Wsv8QGbX/EBm1/8HB0//g4OD/4ODg/+Dg4P/g4OD/4ODg/+Dg4P/g4OD/4ODg/+Dg4P/g4OD/wcHT/xAZtf8QGbX/FBy5/xQcuf+Jibn/x8fZ/+fn5//n5+f/5+fn/+fn5//n5+f/5+fn/+fn5//n5+f/x8fZ/4mJuf8UHLn/FBy5/xogvv8aIL7/zc3g/42Nvv/NzeD/7u7u/+7u7v9qat3/amrd/+7u7v/u7u7/zc3g/42Nvv/NzeD/GiC+/xogvv8gJcP/ICXD//X19f/T0+f/kZHE/6Sk0v9SUtv/PT3U/z091P9SUtv/pKTS/5GRxP/T0+f/9fX1/yAlw/8gJcP/Ki7K/youyv/7+/v/+/v7/6qq2f9YWOH/Q0Pb/zw82P88PNj/Q0Pb/1hY4f+qqtn/+/v7//v7+/8qLsr/Ki7K/zc60f83OtH///////////9fX+b/R0fd/0RE3P+6uv//urr//0RE3P9KSt//X1/m////////////NzrR/zc60f9GR9f/RkfX//////9mZuf/U1Pg/0xM3v+9vf////////////+9vf//TEze/1NT4P9mZuf//////0ZH1/9GR9f/UlLd/1JS3f9tbej/V1fg/1RU3//AwP///////////////////////8DA//9UVN//YGDk/21t6P9SUt3/UlLd/1tb4f9bW+H/W1vh/1tb4f/Dw///////////////////////////////////w8P//1tb4f9bW+H/W1vh/1tb4f9gYOH/YGDh/2Bg4f+Kitz/np7P/56ez/+ens//np7P/56ez/+ens//np7P/56ez/+Kitz/YGDh/2Bg4f9gYOH/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA//////////8AAP//AAD//wAA//8AAP//AAD//wAA//8AAP//AAD//wAA//8AAP//AAD//////////////////w==',
  54. 			unread:	'data:image/x-icon;base64,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',
  55. 		};
  56. 		this.pixelMaps = {
  57. 			icons: {
  58. 				'unread':
  59. 					[
  60. 						['','','','','','','','','','','','','','','',''],
  61. 						['','','','','','','','','','','','','','','',''],
  62. 						['','','','','','','','','','','','','','','',''],
  63. 						['#4f7fe8','#4f7fe8','#4f7fe8','#7e9ce0','#95a8d0','#95a8d0','#95a8d0','#95a8d0','#95a8d0','#95a8d0','#95a8d0','#95a8d0','#7e9ce0','#4f7fe8','#4f7fe8','#4f7fe8'],
  64. 						['#497ce9','#497ce9','#497ce9','$497ce9','#c0d4ff','#ffffff','#ffffff','#ffffff','#ffffff','#ffffff','#ffffff','#c0d4ff','#497ce9','#497ce9','#497ce9','$497ce9'],
  65. 						['#4074e5','#4074e5','#5d8cef','#4579e8','#4277e7','#bdd2ff','#ffffff','#ffffff','#ffffff','#ffffff','#bdd2ff','#4277e7','#4f80ec','#5d8cef','#4074e5','#4074e5'],
  66. 						['#3268de','#3268de','#ffffff','#5585ee','#4076e8','#396fe6','#bad0ff','#ffffff','#ffffff','#bad0ff','#396fe6','#4076e8','#5585ee','#ffffff','#3268de','#3268de'],
  67. 						['#2359d9','#2359d9','#ffffff','#ffffff','#4e80ee','#336ce6','#3069e5','#b7ceff','#b7ceff','#3069e5','#376ee8','#4e80ee','#ffffff','#ffffff','#2359d9','#2359d9'],
  68. 						['#144cd2','#144cd2','#fbfbfb','#fbfbfb','#a3b4da','#467ae9','#2f68e4','#2762e1','#2762e1','#2f68e4','#467ae9','#a3b4da','#fbfbfb','#fbfbfb','#144cd2','#144cd2'],
  69. 						['#0941cc','#0941cc','#f5f5f5','#cfd6e7','#879ac4','#9cadd3','#4073e3','#2962dc','#2962dc','#4073e3','#9cadd3','#879ac4','#cfd6e7','#f5f5f5','#0941cc','#0941cc'],
  70. 						['#033ac6','#033ac6','#c8d0e0','#8396be','#c8d0e0','#ededed','#ededed','#5a85e3','#5a85e3','#ededed','#ededed','#c8d0e0','#8396be','#c8d0e0','#033ac6','#033ac6'],
  71. 						['#0031c1','#0031c1','#8092b9','#c3c9d8','#e6e6e6','#e6e6e6','#e6e6e6','#e6e6e6','#e6e6e6','#e6e6e6','#e6e6e6','#e6e6e6','#c3c9d8','#8092b9','#0031c1','#0031c1'],
  72. 						['#002cbd','#002cbd','#bdc3d2','#dedede','#dedede','#dedede','#dedede','#dedede','#dedede','#dedede','#dedede','#dedede','#dedede','#bdc3d2','#002cbd','#002cbd'],
  73. 						['#0029ba','#0029ba','#7888ad','#7888ad','#7888ad','#7888ad','#7888ad','#7888ad','#7888ad','#7888ad','#7888ad','#7888ad','#7888ad','#7888ad','#0029ba','#0029ba'],
  74. 						['','','','','','','','','','','','','','','',''],
  75. 						['','','','','','','','','','','','','','','','']
  76. 					]
  77. 				},
  78. 			numbers: [
  79. 				[
  80. 					[0,1,1,0],
  81. 					[1,0,0,1],
  82. 					[1,0,0,1],
  83. 					[1,0,0,1],
  84. 					[0,1,1,0]
  85. 				],
  86. 				[
  87. 					[0,1,0],
  88. 					[1,1,0],
  89. 					[0,1,0],
  90. 					[0,1,0],
  91. 					[1,1,1]
  92. 				],
  93. 				[
  94. 					[1,1,1,0],
  95. 					[0,0,0,1],
  96. 					[0,1,1,0],
  97. 					[1,0,0,0],
  98. 					[1,1,1,1]
  99. 				],
  100. 				[
  101. 					[1,1,1,0],
  102. 					[0,0,0,1],
  103. 					[0,1,1,0],
  104. 					[0,0,0,1],
  105. 					[1,1,1,0]
  106. 				],
  107. 				[
  108. 					[0,0,1,0],
  109. 					[0,1,1,0],
  110. 					[1,0,1,0],
  111. 					[1,1,1,1],
  112. 					[0,0,1,0]
  113. 				],
  114. 				[
  115. 					[1,1,1,1],
  116. 					[1,0,0,0],
  117. 					[1,1,1,0],
  118. 					[0,0,0,1],
  119. 					[1,1,1,0]
  120. 				],
  121. 				[
  122. 					[0,1,1,0],
  123. 					[1,0,0,0],
  124. 					[1,1,1,0],
  125. 					[1,0,0,1],
  126. 					[0,1,1,0]
  127. 				],
  128. 				[
  129. 					[1,1,1,1],
  130. 					[0,0,0,1],
  131. 					[0,0,1,0],
  132. 					[0,1,0,0],
  133. 					[0,1,0,0]
  134. 				],
  135. 				[
  136. 					[0,1,1,0],
  137. 					[1,0,0,1],
  138. 					[0,1,1,0],
  139. 					[1,0,0,1],
  140. 					[0,1,1,0]
  141. 				],
  142. 				[
  143. 					[0,1,1,0],
  144. 					[1,0,0,1],
  145. 					[0,1,1,1],
  146. 					[0,0,0,1],
  147. 					[0,1,1,0]
  148. 				],
  149. 			]
  150. 		};
  151.  
  152. 		this.timer = setInterval(this.poll, 500);
  153. 		this.poll();
  154.  
  155. 		return true;
  156. 	}
  157.  
  158. 	this.drawUnreadCount = function(unread) {
  159. 		if(!self.textedCanvas) {
  160. 			self.textedCanvas = [];
  161. 		}
  162.  
  163. 		if(!self.textedCanvas[unread]) {
  164. 			var iconCanvas = self.getUnreadCanvas();
  165. 			var textedCanvas = document.createElement('canvas');
  166. 			textedCanvas.height = textedCanvas.width = iconCanvas.width;
  167. 			var ctx = textedCanvas.getContext('2d');
  168. 			ctx.drawImage(iconCanvas, 0, 0);
  169.  
  170. 			ctx.fillStyle = "#fef4ac";
  171. 			ctx.strokeStyle = "#dabc5c";
  172. 			ctx.strokeWidth = 1;
  173.  
  174. 			var count = unread.length;
  175. 			var bgHeight = self.pixelMaps.numbers[0].length;
  176. 			var bgWidth = 0;
  177. 			var padding = count > 2 ? 0 : 1;
  178.  
  179. 			for(var index = 0; index < count; index++) {
  180. 				bgWidth += self.pixelMaps.numbers[unread[index]][0].length;
  181. 				if(index < count-1) {
  182. 					bgWidth += padding;
  183. 				}
  184. 			}
  185. 			bgWidth = bgWidth > textedCanvas.width-4 ? textedCanvas.width-4 : bgWidth;
  186.  
  187. 			ctx.fillRect(textedCanvas.width-bgWidth-4,2,bgWidth+4,bgHeight+4);
  188.  
  189.  
  190. 			var digit;
  191. 			var digitsWidth = bgWidth;
  192. 			for(var index = 0; index < count; index++) {
  193. 				digit = unread[index];
  194. 				if (self.pixelMaps.numbers[digit]) {
  195. 					var map = self.pixelMaps.numbers[digit];
  196. 					var height = map.length;
  197. 					var width = map[0].length;
  198.  
  199.  
  200. 					ctx.fillStyle = "#2c3323";
  201.  
  202. 					for (var y = 0; y < height; y++) {
  203. 						for (var x = 0; x < width; x++) {
  204. 							if(map[y][x]) {
  205. 								ctx.fillRect(14- digitsWidth + x, y+4, 1, 1);
  206. 							}
  207. 						}
  208. 					}
  209.  
  210. 					digitsWidth -= width + padding;
  211. 				}
  212. 			}	
  213.  
  214. 			ctx.strokeRect(textedCanvas.width-bgWidth-3.5,2.5,bgWidth+3,bgHeight+3);
  215.  
  216. 			self.textedCanvas[unread] = textedCanvas;
  217. 		}
  218.  
  219. 		return self.textedCanvas[unread];
  220. 	}
  221. 	this.getUnreadCanvas = function() {
  222. 		if(!self.unreadCanvas) {
  223. 			self.unreadCanvas = document.createElement('canvas');
  224. 			self.unreadCanvas.height = self.unreadCanvas.width = 16;
  225.  
  226. 			var ctx = self.unreadCanvas.getContext('2d');
  227.  
  228. 			for (var y = 0; y < self.unreadCanvas.width; y++) {
  229. 				for (var x = 0; x < self.unreadCanvas.height; x++) {
  230. 					if (self.pixelMaps.icons.unread[y][x]) {
  231. 						ctx.fillStyle = self.pixelMaps.icons.unread[y][x];
  232. 						ctx.fillRect(x, y, 1, 1);
  233. 					}
  234. 				}
  235. 			}
  236. 		}
  237.  
  238. 		return self.unreadCanvas;
  239. 	}
  240. 	this.getChat = function() { return false || GM_getValue('chatEnabled', true); }
  241. 	this.getDebugging = function() { return false || GM_getValue('debuggingEnabled', false); }
  242. 	this.getSearchElement = function() {
  243. 		var element;
  244. 		var nav = document.body.getElementsByClassName('n0');
  245.  
  246. 		if(nav) {
  247. 			var potential = nav[0];
  248.  
  249. 			if(potential.className.indexOf('n0') !== -1) {
  250. 				element = potential;
  251. 			}
  252. 		}
  253.  
  254. 		return element ? element: null;
  255. 	}
  256. 	this.newChat = function() {
  257. 		var title = self.title.innerHTML;
  258. 		for(var index in self.chatText) {
  259. 			var location = title.indexOf(self.chatText[index].value);
  260. 			if(self.chatText[index].chars + location == title.length) {
  261. 				return true;
  262. 			}
  263. 		}
  264. 		return false;
  265. 	}
  266. 	this.newMail = function() { return self.searchElement.textContent.match(/\((\d*)\)/); }
  267. 	this.getUnreadCountDisplay = function() { return GM_getValue('unreadCountDisplay', true); }
  268. 	this.getUnreadCount = function() {
  269. 		if(this.newMail()) {
  270. 			matches = self.searchElement.textContent.match(/\((\d*)\)/);
  271. 			return matches ? matches[1] : false;
  272. 		}
  273. 	}
  274. 	this.getUnreadCountIcon = function() {
  275. 		var unread = self.getUnreadCount();		
  276. 		if(this.getUnreadCountDisplay()) {
  277. 			return self.drawUnreadCount(unread).toDataURL('image/png');
  278. 		} else {
  279. 			return self.icons.unread;
  280. 		}
  281. 	}
  282.  
  283. 	this.poll = function() {
  284. 		if(!self.searchElement)
  285. 			return self.searchElement = self.getSearchElement();
  286.  
  287. 		if(self.getChat() && self.newChat()) {
  288. 			return self.setIcon(self.icons.chat);
  289. 		}
  290.  
  291. 		if(self.newMail())
  292. 			self.setIcon(self.getUnreadCountIcon());
  293. 		else
  294. 			self.setIcon(self.icons.read);
  295. 	}
  296.  
  297. 	this.setIcon = function(icon) {
  298. 		var links = self.head.getElementsByTagName("link");
  299. 		for (var i = 0; i < links.length; i++)
  300. 			if ((links[i].rel == "shortcut icon" || links[i].rel=="icon") &&
  301. 			   links[i].href != icon)
  302. 				self.head.removeChild(links[i]);
  303. 			else if(links[i].href == icon)
  304. 				return;
  305.  
  306. 		var newIcon = document.createElement("link");
  307. 		newIcon.type = "image/png";
  308. 		newIcon.rel = "shortcut icon";
  309. 		newIcon.href = icon;
  310.  
  311. 		self.head.appendChild(newIcon);
  312.  
  313. 		var shim = document.createElement('iframe');
  314. 		shim.width = shim.height = 0;
  315. 		document.body.appendChild(shim);
  316. 		shim.src = "icon";
  317. 		document.body.removeChild(shim);
  318. 	}
  319.  
  320. 	this.toString = function() { return '[object GmailFavIconAlerts]'; }
  321.  
  322. 	return this.construct();
  323. }

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