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- /**
- * 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;
- }
- }
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