/** * http://www.openjs.com/scripts/events/keyboard_shortcuts/ * Version : 2.01.B * By Binny V A * License : BSD */ var 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 { var dfo; for (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 < keys.length; i++) { //Modifiers if (k == 'ctrl' || k == 'control') { kp++; modifiers.ctrl.wanted = true; } else if (k == 'shift') { kp++; modifiers.shift.wanted = true; } else if (k == 'alt') { kp++; modifiers.alt.wanted = true; } else if (k == 'meta') { kp++; modifiers.meta.wanted = true; } else if (k.length > 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; } }