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Pop-Up Blocker

Simple but effective popup window blocker. Also tries to deny unsolicited redirections.

目前为 2016-12-14 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name        Pop-Up Blocker
  3. // @namespace   HTML
  4. // @description Simple but effective popup window blocker. Also tries to deny unsolicited redirections.
  5. // @include     *
  6. // @version     $Id$
  7. // ==/UserScript==
  8.  
  9. (function () {
  10. 	var BLOCK_MODE = {'ALL': 0,  // Block all popups
  11. 										'CONFIRM': 2,  // Confirm each popup (not recommended, but useful for testing)
  12. 										'GRANT_PERIOD': 4,  // Block popups that are initiated after the mouse click grant period
  13. 										'INSECURE': 8}  // Block popups from insecure (HTTP) sites
  14.  
  15. 	// Configuration
  16. 	var block_mode = BLOCK_MODE.GRANT_PERIOD | BLOCK_MODE.INSECURE;
  17. 	var grant_period = 100;  // Milliseconds
  18. 	var debug = false;  // Enable debug logging
  19.  
  20. 	// DO NOT CHANGE BELOW THIS POINT
  21. 	var allowed_elements = {'a': 1, 'button': 1, 'input': 1, 'select': 1, 'option': 1};
  22. 	var ts = 0, wopen = window.open, showmodaldlg = window.showModalDialog;
  23. 	var lastInteractedElement;
  24. 	var marginTop = null;
  25. 	var notifications = 0;
  26. 	var notificationOffsetTop = 0;
  27.  
  28. 	window.addEventListener('mousedown', function (event) {
  29. 		ts = Date.now();
  30. 		if (debug) console.info('Mouse button', event.button != null ? event.button : event.which, 'down on', event.target);
  31. 		setlastInteractedElement(event);
  32. 		//mediateEventPropagation(event);
  33. 	}, true);
  34.  
  35. 	window.addEventListener('click', function (event) {
  36. 		ts = Date.now();
  37. 		if (debug) console.info('Mouse button', event.button != null ? event.button : event.which, 'click on', event.target);
  38. 		setlastInteractedElement(event);
  39. 		//mediateEventPropagation(event);
  40. 	}, true);
  41.  
  42. 	window.addEventListener('change', function (event) {
  43. 		ts = Date.now();
  44. 		if (debug) console.info('Changed selection on', event.target);
  45. 		setlastInteractedElement(event);
  46. 		//mediateEventPropagation(event);
  47. 	}, true);
  48.  
  49. 	function setlastInteractedElement(event) {
  50. 		// Deal with tags nested in (e.g.) links
  51. 		var element = event.target;
  52. 		if (event instanceof MouseEvent && (event.button != null ? event.button != 0 : event.which != 1)) return;
  53. 		while (element.parentElement && element.tagName && !allowed_elements[element.tagName.toLowerCase()]) {
  54. 			element = element.parentElement;
  55. 		}
  56. 		lastInteractedElement = element;
  57. 		if (debug) console.info('Last interacted element', element);
  58. 	}
  59.  
  60. 	function mediateEventPropagation(event) {
  61. 		// Stop event propagation if element has a 'href' attribute that does not point to the current document
  62. 		// (prevents click hijacking)
  63. 		if ((block_mode & BLOCK_MODE.INSECURE ? location.protocol != 'https:' : true) &&
  64. 			lastInteractedElement &&
  65. 			lastInteractedElement.href &&
  66. 			boildown(lastInteractedElement.href) != boildown(window.location.href) &&
  67. 			lastInteractedElement.href.indexOf('javascript:') !== 0) {
  68. 			event.stopPropagation();
  69. 			console.warn('Pop-Up Blocker stopped event propagation for', event);
  70. 		}
  71. 	}
  72.  
  73. 	function regExpEscape(s) {
  74. 		return String(s).replace(/([-()\[\]{}+?*.$\^|,:#<!\\])/g, '\\$1').
  75. 			replace(/\x08/g, '\\x08');
  76. 	};
  77.  
  78. 	var regExpProtHostPathQ = new RegExp('^(' + regExpEscape(location.protocol) + '//' +
  79. 										   '(' + regExpEscape(location.host) +
  80. 										    '(' + regExpEscape(location.pathname) + ')))?');
  81.  
  82. 	function boildown(uri) {
  83. 		var uri_boileddown = uri.replace(regExpProtHostPathQ, '');  // Strip current protocol + host + path
  84. 		uri_boileddown = uri_boileddown.replace(/#[^#]*$/, '');  // Strip any hash
  85. 		// Sort query vars
  86. 		var query = uri_boileddown.match(/\?[^?]+/);
  87. 		if (query)
  88. 			query = '?' + query[0].substr(1).split('&').sort().join('&');
  89. 		uri_boileddown = uri_boileddown.replace(/\?[^?]+/, query || '');
  90. 		return uri_boileddown;
  91. 	};
  92.  
  93. 	// Deny unsolicited redirection
  94. 	if (typeof window.location.watch == 'function') window.location.watch(
  95. 		'href',
  96. 		function (id, oldval, newval) {
  97. 			var href_boileddown, newval_boileddown = boildown(newval);
  98. 			console.info('location.' + id, '->', newval);
  99. 			if (lastInteractedElement && lastInteractedElement.tagName &&
  100. 				lastInteractedElement.tagName.toLowerCase() == 'a')
  101. 				href_boileddown = boildown(lastInteractedElement.href);
  102. 			if ((block_mode & BLOCK_MODE.INSECURE ? location.protocol != 'https:' : true) &&
  103. 				(!lastInteractedElement ||
  104. 				 (lastInteractedElement.tagName &&
  105. 				  (!allowed_elements[lastInteractedElement.tagName.toLowerCase()] ||
  106. 				   (lastInteractedElement.tagName.toLowerCase() == 'a' &&
  107. 				    (newval_boileddown != href_boileddown ||
  108. 				     lastInteractedElement.target == '_blank')))) ||
  109. 				 Date.now() > ts + grant_period)) {
  110. 				if (debug) {
  111. 					console.info('Page secure?', location.protocol == 'https:');
  112. 					console.info('Allow insecure page?', block_mode & BLOCK_MODE.INSECURE ? false : true);
  113. 					console.info('Last interacted element?', lastInteractedElement);
  114. 					if (lastInteractedElement) {
  115. 						console.info('Last interacted element tag name?', lastInteractedElement.tagName);
  116. 						if (lastInteractedElement.tagName) {
  117. 							console.info('Allowed element?', !!allowed_elements[lastInteractedElement.tagName.toLowerCase()]);
  118. 							console.info('Last interacted element is link?', lastInteractedElement.tagName.toLowerCase() == 'a');
  119. 							if (lastInteractedElement.tagName.toLowerCase() == 'a') {
  120. 								console.info('New location (boiled down) =', newval_boileddown);
  121. 								console.info('Link HREF (boiled down) =', href_boileddown);
  122. 								console.info('New location is the same as link HREF?', newval_boileddown == href_boileddown);
  123. 								console.info('Link target is a new window?', lastInteractedElement.target == '_blank');
  124. 							}
  125. 						}
  126. 					}
  127. 					console.info('Grant period exceeded?', Date.now() > ts + grant_period);
  128. 				}
  129. 				notify('Denied redirection to', newval, null, 0, null, '_self');
  130. 				throw new Error('Pop-Up Blocker denied redirection to ' + newval);
  131. 			}
  132. 			return newval;
  133. 		}
  134. 	);
  135.  
  136. 	var onbeforeunload = window.onbeforeunload;
  137. 	window.onbeforeunload = function () {
  138. 		// Check if the last interacted element was a link or button, otherwise make browser ask if the user really wants to leave the page
  139. 		if (lastInteractedElement && lastInteractedElement.tagName &&
  140. 				!allowed_elements[lastInteractedElement.tagName.toLowerCase()] &&
  141. 				(block_mode & BLOCK_MODE.INSECURE ? location.protocol != 'https:' : true) && Date.now() <= ts + grant_period) {
  142. 			if (debug) {
  143. 				console.info('Page secure?', location.protocol == 'https:');
  144. 				console.info('Allow insecure page?', block_mode & BLOCK_MODE.INSECURE ? false : true);
  145. 					console.info('Last interacted element?', lastInteractedElement);
  146. 					if (lastInteractedElement) {
  147. 						console.info('Last interacted element tag name?', lastInteractedElement.tagName);
  148. 						if (lastInteractedElement.tagName) {
  149. 							console.info('Allowed element?', !!allowed_elements[lastInteractedElement.tagName.toLowerCase()]);
  150. 						}
  151. 					}
  152. 					console.info('Grant period exceeded?', Date.now() > ts + grant_period);
  153. 			}
  154. 			return 'You are possibly involuntarily being redirected to another page. Do you want to leave ' + location.href + ' or stay?';
  155. 		}
  156. 		else if (typeof onbeforeunload === 'function')
  157. 			return onbeforeunload.apply(window, arguments);
  158. 	};
  159.  
  160. 	function confirmPopup(msg, args) {
  161. 		confirm(msg + ' (' + Array.prototype.slice.apply(arguments).join(', ') + ')');
  162. 	}
  163.  
  164. 	window.open = function () {
  165. 		var oargs = arguments;
  166. 		if (debug) {
  167. 			console.info('Page secure?', location.protocol == 'https:');
  168. 			console.info('Allow insecure page?', block_mode & BLOCK_MODE.INSECURE ? false : true);
  169. 			console.info('Grant period exceeded?', Date.now() > ts + grant_period);
  170. 		}
  171. 		if (['_self', '_parent', '_top'].includes(arguments[1]) ||
  172. 			(block_mode != BLOCK_MODE.ALL &&
  173. 				(block_mode & BLOCK_MODE.CONFIRM
  174. 				 ? confirmPopup('Allow popup?', arguments)
  175. 				 : (block_mode & BLOCK_MODE.INSECURE ? location.protocol == 'https:' : true) && Date.now() <= ts + grant_period))) {
  176. 			console.info('Pop-Up Blocker allowed window.open', Array.prototype.slice.apply(arguments));
  177. 			return wopen.apply(window, arguments);
  178. 		}
  179. 		else {
  180. 			console.warn('Pop-Up Blocker blocked window.open', Array.prototype.slice.apply(arguments));
  181. 			notify('Blocked popup window', arguments[0], arguments[1], 0, function() {
  182. 				console.info('Pop-Up Blocker user clicked window.open', Array.prototype.slice.apply(oargs));
  183. 				wopen.apply(window, oargs);
  184. 			});
  185. 		}
  186. 		return {}
  187. 	};
  188.  
  189. 	window.showModalDialog = function () {
  190. 		if (debug) {
  191. 			console.info('Page secure?', location.protocol == 'https:');
  192. 			console.info('Allow insecure page?', block_mode & BLOCK_MODE.INSECURE ? false : true);
  193. 			console.info('Grant period exceeded?', Date.now() > ts + grant_period);
  194. 		}
  195. 		if (block_mode != BLOCK_MODE.ALL &&
  196. 				(block_mode & BLOCK_MODE.CONFIRM
  197. 				 ? confirmPopup('Allow modal dialog?', arguments)
  198. 				 : (block_mode & BLOCK_MODE.INSECURE ? location.protocol == 'https:' : true) && Date.now() <= ts + grant_period)) {
  199. 			console.info('Pop-Up Blocker allowed window.showModalDialog', Array.prototype.slice.apply(arguments));
  200. 			return showmodaldlg.apply(window, arguments);
  201. 		}
  202. 		else {
  203. 			console.warn('Pop-Up Blocker blocked modal showModalDialog', Array.prototype.slice.apply(arguments));
  204. 			notify('Blocked modal dialog', arguments[0], null, 0, function() {
  205. 				console.info('Pop-Up Blocker user clicked window.showModalDialog', Array.prototype.slice.apply(oargs));
  206. 				showmodaldlg.apply(window, oargs);
  207. 			});
  208. 		}
  209. 		return {}
  210. 	};
  211.  
  212. 	function notify(text, uri, title, timeout, onclick, target) {
  213. 		var rootElement = document.body.parentElement,
  214. 				notification = document.createElement('div');
  215. 		if (marginTop === null) marginTop = parseFloat((rootElement.currentStyle || window.getComputedStyle(rootElement)).marginTop)
  216. 		resetStyles(notification);
  217. 		notification.style.cssText = 'background: InfoBackground !important';
  218. 		notification.style.cssText += 'border-bottom: 1px solid WindowFrame !important';
  219. 		notification.style.cssText += 'box-sizing: border-box !important';
  220. 		notification.style.cssText += 'font: small-caption !important';
  221. 		notification.style.cssText += 'padding: .15em .9em !important';
  222. 		notification.style.cssText += 'position: fixed !important';
  223. 		notification.style.cssText += 'left: 0 !important';
  224. 		notification.style.cssText += 'line-height: 2.3 !important';  // 31px
  225. 		notification.style.cssText += 'right: 0 !important';
  226. 		notification.style.cssText += 'top: -100% !important';
  227. 		notification.style.cssText += 'transition: top .25s !important';
  228. 		notification.style.cssText += 'width: 100% !important';
  229. 		notification.style.cssText += 'white-space: nowrap !important';
  230. 		notification.style.cssText += 'z-index: 2147483647 !important';
  231. 		var closeButton = document.createElement('span');
  232. 		resetStyles(closeButton);
  233. 		closeButton.style.cssText += 'cursor: pointer !important';
  234. 		closeButton.style.cssText += 'display: inline-block !important';
  235. 		closeButton.style.cssText += 'float: right !important';
  236. 		closeButton.style.cssText += 'font: inherit !important';
  237. 		closeButton.style.cssText += 'line-height: 2.1 !important';
  238. 		closeButton.style.cssText += 'margin-left: .75em !important';
  239. 		closeButton.appendChild(document.createTextNode('╳'));
  240. 		function closeNotification(event) {
  241. 			if (event) event.stopPropagation();
  242. 			//notificationOffsetTop -= notification.offsetHeight;
  243. 			if (!--notifications) rootElement.style.cssText += 'margin-top: ' + marginTop + ' !important';
  244. 			notification.style.cssText += 'top: -' + notification.offsetHeight + 'px !important';
  245. 			setTimeout(function () {
  246. 				document.body.removeChild(notification);
  247. 			}, 250);
  248. 			return false;
  249. 		}
  250. 		closeButton.onclick = closeNotification;
  251. 		notification.appendChild(closeButton);
  252. 		notification.appendChild(document.createTextNode('? ' + text));
  253. 		var numLinks = target == '_self' ? 1 : 2;
  254. 		for (var i = 0; i < numLinks; i ++) {
  255. 			var popupLink = document.createElement(!i ? 'a' : 'button');
  256. 			resetStyles(popupLink);
  257. 			if (i) {
  258. 				popupLink.style.cssText = '-moz-appearance: button !important';
  259. 				popupLink.style.cssText += '-webkit-appearance: button !important';
  260. 				popupLink.style.cssText += 'appearance: button !important';
  261. 				popupLink.style.cssText += 'font: small-caption !important';
  262. 			}
  263. 			else {
  264. 				popupLink.style.cssText += 'color: #00e !important';
  265. 				popupLink.style.cssText += 'color: -moz-nativehyperlinktext !important';
  266. 				popupLink.style.cssText += 'display: inline-block !important';
  267. 				popupLink.style.cssText += 'font: inherit !important';
  268. 				popupLink.style.cssText += 'max-width: 50% !important';
  269. 				popupLink.style.cssText += 'overflow: hidden !important';
  270. 				popupLink.style.cssText += 'text-decoration: underline !important';
  271. 				popupLink.style.cssText += 'text-overflow: ellipsis !important';
  272. 				popupLink.style.cssText += 'vertical-align: bottom !important';
  273. 				popupLink.style.cssText += 'white-space: nowrap !important';
  274. 				popupLink.setAttribute('href', uri);
  275. 				popupLink.setAttribute('target', target || '_blank');
  276. 			}
  277. 			if (title) popupLink.setAttribute('title', title);
  278. 			var linkText = i ? 'Open in this frame' : uri;
  279. 			popupLink.appendChild(document.createTextNode(linkText));
  280. 			popupLink.onclick = function(event) {
  281. 				event.stopPropagation();
  282. 				closeNotification();
  283. 				if (this.tagName.toLowerCase() != 'a') {
  284. 					location.href = uri;
  285. 				}
  286. 				else if (onclick) {
  287. 					onclick(event);
  288. 					return false;
  289. 				}
  290. 			};
  291. 			notification.appendChild(document.createTextNode(' '));
  292. 			notification.appendChild(popupLink);
  293. 		}
  294. 		if (!notifications) rootElement.style.cssText += 'transition: margin-top .25s !important';
  295. 		document.body.appendChild(notification);
  296. 		// Note: offsetHeight is zero while the element is not part of the document DOM tree
  297. 		notification.style.cssText += 'top: -' + notification.offsetHeight + 'px !important';
  298. 		setTimeout(function() {
  299. 			//notificationOffsetTop += notification.offsetHeight;
  300. 			notification.style.cssText += 'top: ' + notificationOffsetTop + 'px !important';
  301. 			if (!notifications) rootElement.style.cssText += 'margin-top: ' + (marginTop + notification.offsetHeight) + 'px !important';
  302. 			notifications ++;
  303. 		}, 0)
  304. 		if (timeout) {
  305. 			setTimeout(function () {
  306. 				closeNotification();
  307. 			}, timeout);
  308. 		}
  309. 	}
  310.  
  311. 	function resetStyles(element) {
  312. 		element.style.cssText = 'background: transparent !important';
  313. 		element.style.cssText += 'border: none !important';
  314. 		element.style.cssText += 'border-radius: 0 !important';
  315. 		element.style.cssText += 'bottom: auto !important';
  316. 		element.style.cssText += 'box-shadow: none !important';
  317. 		element.style.cssText += 'color: WindowText !important';
  318. 		element.style.cssText += 'font: medium serif !important';
  319. 		element.style.cssText += 'line-height: normal !important';
  320. 		element.style.cssText += 'margin: 0 !important';
  321. 		element.style.cssText += 'opacity: 1 !important';
  322. 		element.style.cssText += 'outline: none !important';
  323. 		element.style.cssText += 'padding: 0 !important';
  324. 		element.style.cssText += 'position: static !important';
  325. 		element.style.cssText += 'text-align: left !important';
  326. 		element.style.cssText += 'text-shadow: none !important';
  327. 		element.style.cssText += 'left: auto !important';
  328. 		element.style.cssText += 'right: auto !important';
  329. 		element.style.cssText += 'top: auto !important';
  330. 		element.style.cssText += 'white-space: normal !important';
  331. 		element.style.cssText += 'width: auto !important';
  332. 	}
  333. })();