☰

F1 Key blocker

Blocks F1 key default behaviour

  1. // ==UserScript==
  2. // @name         F1 Key blocker
  3. // @namespace    glubsy
  4. // @version      0.1
  5. // @description  Blocks F1 key default behaviour
  6. // @author       glubsy
  7. // @include      *
  8. // ==/UserScript==
  9. //// @require http://www.openjs.com/scripts/events/keyboard_shortcuts/shortcut.js
  10. /**
  11.  * http://www.openjs.com/scripts/events/keyboard_shortcuts/
  12.  * Version : 2.01.B
  13.  * By Binny V A
  14.  * License : BSD
  15.  */
  16.  
  17. shortcut = {
  18. 	'all_shortcuts':{},//All the shortcuts are stored in this array
  19. 	'add': function(shortcut_combination,callback,opt) {
  20. 		//Provide a set of default options
  21. 		var default_options = {
  22. 			'type':'keydown',
  23. 			'propagate':false,
  24. 			'disable_in_input':false,
  25. 			'target':document,
  26. 			'keycode':false
  27. 		};
  28. 		if(!opt) opt = default_options;
  29. 		else {
  30. 			for(var dfo in default_options) {
  31. 				if(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];
  32. 			}
  33. 		}
  34.  
  35. 		var ele = opt.target;
  36. 		if(typeof opt.target == 'string') ele = document.getElementById(opt.target);
  37. 		var ths = this;
  38. 		shortcut_combination = shortcut_combination.toLowerCase();
  39.  
  40. 		//The function to be called at keypress
  41. 		var func = function(e) {
  42. 			e = e || window.event;
  43.  
  44. 			if(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields
  45. 				var element;
  46. 				if(e.target) element=e.target;
  47. 				else if(e.srcElement) element=e.srcElement;
  48. 				if(element.nodeType==3) element=element.parentNode;
  49.  
  50. 				if(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;
  51. 			}
  52.  
  53. 			//Find Which key is pressed
  54. 			if (e.keyCode) code = e.keyCode;
  55. 			else if (e.which) code = e.which;
  56. 			var character = String.fromCharCode(code).toLowerCase();
  57.  
  58. 			if(code == 188) character=","; //If the user presses , when the type is onkeydown
  59. 			if(code == 190) character="."; //If the user presses , when the type is onkeydown
  60.  
  61. 			var keys = shortcut_combination.split("+");
  62. 			//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked
  63. 			var kp = 0;
  64.  
  65. 			//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken
  66. 			var shift_nums = {
  67. 				"`":"~",
  68. 				"1":"!",
  69. 				"2":"@",
  70. 				"3":"#",
  71. 				"4":"$",
  72. 				"5":"%",
  73. 				"6":"^",
  74. 				"7":"&",
  75. 				"8":"*",
  76. 				"9":"(",
  77. 				"0":")",
  78. 				"-":"_",
  79. 				"=":"+",
  80. 				";":":",
  81. 				"'":"\"",
  82. 				",":"<",
  83. 				".":">",
  84. 				"/":"?",
  85. 				"\\":"|"
  86. 			};
  87. 			//Special Keys - and their codes
  88. 			var special_keys = {
  89. 				'esc':27,
  90. 				'escape':27,
  91. 				'tab':9,
  92. 				'space':32,
  93. 				'return':13,
  94. 				'enter':13,
  95. 				'backspace':8,
  96.  
  97. 				'scrolllock':145,
  98. 				'scroll_lock':145,
  99. 				'scroll':145,
  100. 				'capslock':20,
  101. 				'caps_lock':20,
  102. 				'caps':20,
  103. 				'numlock':144,
  104. 				'num_lock':144,
  105. 				'num':144,
  106.  
  107. 				'pause':19,
  108. 				'break':19,
  109.  
  110. 				'insert':45,
  111. 				'home':36,
  112. 				'delete':46,
  113. 				'end':35,
  114.  
  115. 				'pageup':33,
  116. 				'page_up':33,
  117. 				'pu':33,
  118.  
  119. 				'pagedown':34,
  120. 				'page_down':34,
  121. 				'pd':34,
  122.  
  123. 				'left':37,
  124. 				'up':38,
  125. 				'right':39,
  126. 				'down':40,
  127.  
  128. 				'f1':112,
  129. 				'f2':113,
  130. 				'f3':114,
  131. 				'f4':115,
  132. 				'f5':116,
  133. 				'f6':117,
  134. 				'f7':118,
  135. 				'f8':119,
  136. 				'f9':120,
  137. 				'f10':121,
  138. 				'f11':122,
  139. 				'f12':123
  140. 			};
  141.  
  142. 			var modifiers = {
  143. 				shift: { wanted:false, pressed:false},
  144. 				ctrl : { wanted:false, pressed:false},
  145. 				alt  : { wanted:false, pressed:false},
  146. 				meta : { wanted:false, pressed:false}	//Meta is Mac specific
  147. 			};
  148.  
  149. 			if(e.ctrlKey)	modifiers.ctrl.pressed = true;
  150. 			if(e.shiftKey)	modifiers.shift.pressed = true;
  151. 			if(e.altKey)	modifiers.alt.pressed = true;
  152. 			if(e.metaKey)   modifiers.meta.pressed = true;
  153.  
  154. 			for(var i=0; k=keys[i],i<keys.length; i++) {
  155. 				//Modifiers
  156. 				if(k == 'ctrl' || k == 'control') {
  157. 					kp++;
  158. 					modifiers.ctrl.wanted = true;
  159.  
  160. 				} else if(k == 'shift') {
  161. 					kp++;
  162. 					modifiers.shift.wanted = true;
  163.  
  164. 				} else if(k == 'alt') {
  165. 					kp++;
  166. 					modifiers.alt.wanted = true;
  167. 				} else if(k == 'meta') {
  168. 					kp++;
  169. 					modifiers.meta.wanted = true;
  170. 				} else if(k.length > 1) { //If it is a special key
  171. 					if(special_keys[k] == code) kp++;
  172.  
  173. 				} else if(opt['keycode']) {
  174. 					if(opt['keycode'] == code) kp++;
  175.  
  176. 				} else { //The special keys did not match
  177. 					if(character == k) kp++;
  178. 					else {
  179. 						if(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase
  180. 							character = shift_nums[character]; 
  181. 							if(character == k) kp++;
  182. 						}
  183. 					}
  184. 				}
  185. 			}
  186.  
  187. 			if(kp == keys.length && 
  188. 			   modifiers.ctrl.pressed == modifiers.ctrl.wanted &&
  189. 			   modifiers.shift.pressed == modifiers.shift.wanted &&
  190. 			   modifiers.alt.pressed == modifiers.alt.wanted &&
  191. 			   modifiers.meta.pressed == modifiers.meta.wanted) {
  192. 				callback(e);
  193.  
  194. 				if(!opt['propagate']) { //Stop the event
  195. 					//e.cancelBubble is supported by IE - this will kill the bubbling process.
  196. 					e.cancelBubble = true;
  197. 					e.returnValue = false;
  198.  
  199. 					//e.stopPropagation works in Firefox.
  200. 					if (e.stopPropagation) {
  201. 						e.stopPropagation();
  202. 						e.preventDefault();
  203. 					}
  204. 					return false;
  205. 				}
  206. 			}
  207. 		};
  208. 		this.all_shortcuts[shortcut_combination] = {
  209. 			'callback':func, 
  210. 			'target':ele, 
  211. 			'event': opt['type']
  212. 		};
  213. 		//Attach the function with the event
  214. 		if(ele.addEventListener) ele.addEventListener(opt['type'], func, false);
  215. 		else if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);
  216. 		else ele['on'+opt['type']] = func;
  217. 	},
  218.  
  219. 	//Remove the shortcut - just specify the shortcut and I will remove the binding
  220. 	'remove':function(shortcut_combination) {
  221. 		shortcut_combination = shortcut_combination.toLowerCase();
  222. 		var binding = this.all_shortcuts[shortcut_combination];
  223. 		delete(this.all_shortcuts[shortcut_combination]);
  224. 		if(!binding) return;
  225. 		var type = binding['event'];
  226. 		var ele = binding['target'];
  227. 		var callback = binding['callback'];
  228.  
  229. 		if(ele.detachEvent) ele.detachEvent('on'+type, callback);
  230. 		else if(ele.removeEventListener) ele.removeEventListener(type, callback, false);
  231. 		else ele['on'+type] = false;
  232. 	}
  233. };
  234.  
  235.  
  236.  
  237. shortcut.add("f1",function() {
  238. 	//NOOP;
  239. },{
  240. 	'type':'keydown',
  241. 	'propagate':false,
  242. 	'target':window
  243. });