User:Nischayn22/shortcut.js

/** * http://www.openjs.com/scripts/events/keyboard_shortcuts/ * Version : 2.01.B * By Binny V A * License : BSD */ shortcut = { 'all_shortcuts':{},//All the shortcuts are stored in this array 'add': function(shortcut_combination,callback,opt) { //Provide a set of default options var default_options = { 'type':'keydown', 'propagate':false, 'disable_in_input':false, 'target':document, 'keycode':false }		if(!opt) opt = default_options; else { for(var dfo in default_options) { if(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo]; }		}

var ele = opt.target; if(typeof opt.target == 'string') ele = document.getElementById(opt.target); var ths = this; shortcut_combination = shortcut_combination.toLowerCase;

//The function to be called at keypress var func = function(e) { e = e || window.event; if(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields var element; if(e.target) element=e.target; else if(e.srcElement) element=e.srcElement; if(element.nodeType==3) element=element.parentNode;

if(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return; }			//Find Which key is pressed if (e.keyCode) code = e.keyCode; else if (e.which) code = e.which; var character = String.fromCharCode(code).toLowerCase; if(code == 188) character=","; //If the user presses, when the type is onkeydown if(code == 190) character="."; //If the user presses, when the type is onkeydown

var keys = shortcut_combination.split("+"); //Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked var kp = 0; //Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken var shift_nums = { "`":"~",				"1":"!",				"2":"@",				"3":"#",				"4":"$",				"5":"%",				"6":"^",				"7":"&",				"8":"*",				"9":"(",				"0":")",				"-":"_",				"=":"+",				";":":",				"'":"\"",				",":"<",				".":">",				"/":"?",				"\\":"|"			}			//Special Keys - and their codes			var special_keys = {				'esc':27,				'escape':27,				'tab':9,				'space':32,				'return':13,				'enter':13,				'backspace':8,				'scrolllock':145,				'scroll_lock':145,				'scroll':145,				'capslock':20,				'caps_lock':20,				'caps':20,				'numlock':144,				'num_lock':144,				'num':144,				'pause':19,				'break':19,				'insert':45,				'home':36,				'delete':46,				'end':35,				'pageup':33,				'page_up':33,				'pu':33,				'pagedown':34,				'page_down':34,				'pd':34,				'left':37,				'up':38,				'right':39,				'down':40,				'f1':112,				'f2':113,				'f3':114,				'f4':115,				'f5':116,				'f6':117,				'f7':118,				'f8':119, 'f9':120, 'f10':121, 'f11':122, 'f12':123 }			var modifiers = { shift: { wanted:false, pressed:false}, ctrl : { wanted:false, pressed:false}, alt : { wanted:false, pressed:false}, meta : { wanted:false, pressed:false}	//Meta is Mac specific };			if(e.ctrlKey)	modifiers.ctrl.pressed = true; if(e.shiftKey)	modifiers.shift.pressed = true; if(e.altKey)	modifiers.alt.pressed = true; if(e.metaKey)  modifiers.meta.pressed = true; for(var i=0; k=keys[i],i 1) { //If it is a special key if(special_keys[k] == code) kp++; } else if(opt['keycode']) { if(opt['keycode'] == code) kp++;

} else { //The special keys did not match if(character == k) kp++; else { if(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase character = shift_nums[character]; if(character == k) kp++; }					}				}			}			if(kp == keys.length && 						modifiers.ctrl.pressed == modifiers.ctrl.wanted &&						modifiers.shift.pressed == modifiers.shift.wanted &&						modifiers.alt.pressed == modifiers.alt.wanted &&						modifiers.meta.pressed == modifiers.meta.wanted) { callback(e); if(!opt['propagate']) { //Stop the event //e.cancelBubble is supported by IE - this will kill the bubbling process. e.cancelBubble = true; e.returnValue = false; //e.stopPropagation works in Firefox. if (e.stopPropagation) { e.stopPropagation; e.preventDefault; }					return false; }			}		}		this.all_shortcuts[shortcut_combination] = { 'callback':func, 'target':ele, 'event': opt['type'] };		//Attach the function with the event if(ele.addEventListener) ele.addEventListener(opt['type'], func, false); else if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func); else ele['on'+opt['type']] = func; },

//Remove the shortcut - just specify the shortcut and I will remove the binding 'remove':function(shortcut_combination) { shortcut_combination = shortcut_combination.toLowerCase; var binding = this.all_shortcuts[shortcut_combination]; delete(this.all_shortcuts[shortcut_combination]) if(!binding) return; var type = binding['event']; var ele = binding['target']; var callback = binding['callback'];

if(ele.detachEvent) ele.detachEvent('on'+type, callback); else if(ele.removeEventListener) ele.removeEventListener(type, callback, false); else ele['on'+type] = false; } }