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+/**
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+ * http://www.openjs.com/scripts/events/keyboard_shortcuts/
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+ * Version : 2.01.B
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+ * By Binny V A
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+ * License : BSD
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+ */
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+shortcut = {
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+ 'all_shortcuts':{},//All the shortcuts are stored in this array
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+ 'add': function(shortcut_combination,callback,opt) {
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+ //Provide a set of default options
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+ var default_options = {
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+ 'type':'keydown',
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+ 'propagate':false,
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+ 'disable_in_input':false,
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+ 'target':document,
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+ 'keycode':false
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+ }
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+ if(!opt) opt = default_options;
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+ else {
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+ for(var dfo in default_options) {
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+ if(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];
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+ }
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+ }
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+
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+ var ele = opt.target;
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+ if(typeof opt.target == 'string') ele = document.getElementById(opt.target);
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+ var ths = this;
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+ shortcut_combination = shortcut_combination.toLowerCase();
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+
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+ //The function to be called at keypress
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+ var func = function(e) {
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+ e = e || window.event;
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+
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+ if(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields
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+ var element;
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+ if(e.target) element=e.target;
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+ else if(e.srcElement) element=e.srcElement;
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+ if(element.nodeType==3) element=element.parentNode;
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+
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+ if(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;
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+ }
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+
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+ //Find Which key is pressed
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+ if (e.keyCode) code = e.keyCode;
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+ else if (e.which) code = e.which;
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+ var character = String.fromCharCode(code).toLowerCase();
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+
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+ if(code == 188) character=","; //If the user presses , when the type is onkeydown
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+ if(code == 190) character="."; //If the user presses , when the type is onkeydown
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+
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+ var keys = shortcut_combination.split("+");
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+ //Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked
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+ var kp = 0;
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+
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+ //Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken
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+ var shift_nums = {
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+ "`":"~",
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+ "1":"!",
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+ "2":"@",
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+ "3":"#",
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+ "4":"$",
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+ "5":"%",
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+ "6":"^",
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+ "7":"&",
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+ "8":"*",
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+ "9":"(",
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+ "0":")",
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+ "-":"_",
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+ "=":"+",
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+ ";":":",
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+ "'":"\"",
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+ ",":"<",
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+ ".":">",
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+ "/":"?",
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+ "\\":"|"
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+ }
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+ //Special Keys - and their codes
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+ var special_keys = {
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+ 'esc':27,
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+ 'escape':27,
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+ 'tab':9,
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+ 'space':32,
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+ 'return':13,
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+ 'enter':13,
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+ 'backspace':8,
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+
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+ 'scrolllock':145,
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+ 'scroll_lock':145,
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+ 'scroll':145,
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+ 'capslock':20,
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+ 'caps_lock':20,
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+ 'caps':20,
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+ 'numlock':144,
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+ 'num_lock':144,
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+ 'num':144,
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+
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+ 'pause':19,
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+ 'break':19,
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+
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+ 'insert':45,
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+ 'home':36,
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+ 'delete':46,
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+ 'end':35,
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+
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+ 'pageup':33,
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+ 'page_up':33,
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+ 'pu':33,
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+
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+ 'pagedown':34,
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+ 'page_down':34,
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+ 'pd':34,
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+
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+ 'left':37,
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+ 'up':38,
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+ 'right':39,
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+ 'down':40,
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+
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+ 'f1':112,
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+ 'f2':113,
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+ 'f3':114,
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+ 'f4':115,
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+ 'f5':116,
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+ 'f6':117,
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+ 'f7':118,
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+ 'f8':119,
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+ 'f9':120,
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+ 'f10':121,
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+ 'f11':122,
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+ 'f12':123
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+ }
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+
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+ var modifiers = {
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+ shift: { wanted:false, pressed:false},
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+ ctrl : { wanted:false, pressed:false},
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+ alt : { wanted:false, pressed:false},
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+ meta : { wanted:false, pressed:false} //Meta is Mac specific
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+ };
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+
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+ if(e.ctrlKey) modifiers.ctrl.pressed = true;
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+ if(e.shiftKey) modifiers.shift.pressed = true;
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+ if(e.altKey) modifiers.alt.pressed = true;
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+ if(e.metaKey) modifiers.meta.pressed = true;
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+
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+ for(var i=0; k=keys[i],i<keys.length; i++) {
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+ //Modifiers
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+ if(k == 'ctrl' || k == 'control') {
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+ kp++;
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+ modifiers.ctrl.wanted = true;
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+
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+ } else if(k == 'shift') {
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+ kp++;
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+ modifiers.shift.wanted = true;
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+
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+ } else if(k == 'alt') {
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+ kp++;
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+ modifiers.alt.wanted = true;
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+ } else if(k == 'meta') {
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+ kp++;
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+ modifiers.meta.wanted = true;
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+ } else if(k.length > 1) { //If it is a special key
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+ if(special_keys[k] == code) kp++;
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+
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+ } else if(opt['keycode']) {
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+ if(opt['keycode'] == code) kp++;
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+
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+ } else { //The special keys did not match
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+ if(character == k) kp++;
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+ else {
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+ if(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase
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+ character = shift_nums[character];
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+ if(character == k) kp++;
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+ }
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+ }
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+ }
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+ }
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+
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+ if(kp == keys.length &&
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+ modifiers.ctrl.pressed == modifiers.ctrl.wanted &&
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+ modifiers.shift.pressed == modifiers.shift.wanted &&
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+ modifiers.alt.pressed == modifiers.alt.wanted &&
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+ modifiers.meta.pressed == modifiers.meta.wanted) {
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+ callback(e);
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+
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+ if(!opt['propagate']) { //Stop the event
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+ //e.cancelBubble is supported by IE - this will kill the bubbling process.
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+ e.cancelBubble = true;
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+ e.returnValue = false;
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+
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+ //e.stopPropagation works in Firefox.
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+ if (e.stopPropagation) {
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+ e.stopPropagation();
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+ e.preventDefault();
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+ }
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+ return false;
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+ }
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+ }
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+ }
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+ this.all_shortcuts[shortcut_combination] = {
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+ 'callback':func,
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+ 'target':ele,
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+ 'event': opt['type']
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+ };
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+ //Attach the function with the event
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+ if(ele.addEventListener) ele.addEventListener(opt['type'], func, false);
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+ else if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);
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+ else ele['on'+opt['type']] = func;
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+ },
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+
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+ //Remove the shortcut - just specify the shortcut and I will remove the binding
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+ 'remove':function(shortcut_combination) {
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+ shortcut_combination = shortcut_combination.toLowerCase();
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+ var binding = this.all_shortcuts[shortcut_combination];
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+ delete(this.all_shortcuts[shortcut_combination])
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+ if(!binding) return;
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+ var type = binding['event'];
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+ var ele = binding['target'];
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+ var callback = binding['callback'];
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+
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+ if(ele.detachEvent) ele.detachEvent('on'+type, callback);
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+ else if(ele.removeEventListener) ele.removeEventListener(type, callback, false);
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+ else ele['on'+type] = false;
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+ }
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+}
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Nathaniel van Diepen