1 /*
  2  * jQuery Hotkeys Plugin
  3  * Copyright 2010, John Resig
  4  * Dual licensed under the MIT or GPL Version 2 licenses.
  5  *
  6  * Based upon the plugin by Tzury Bar Yochay:
  7  * http://github.com/tzuryby/hotkeys
  8  *
  9  * Original idea by:
 10  * Binny V A, http://www.openjs.com/scripts/events/keyboard_shortcuts/
 11 */
 12 
 13 (function(jQuery){
 14 
 15 	jQuery.hotkeys = {
 16 		version: "0.8",
 17 
 18 		specialKeys: {
 19 			8: "backspace", 9: "tab", 13: "return", 16: "shift", 17: "ctrl", 18: "alt", 19: "pause",
 20 			20: "capslock", 27: "esc", 32: "space", 33: "pageup", 34: "pagedown", 35: "end", 36: "home",
 21 			37: "left", 38: "up", 39: "right", 40: "down", 45: "insert", 46: "del", 
 22 			96: "0", 97: "1", 98: "2", 99: "3", 100: "4", 101: "5", 102: "6", 103: "7",
 23 			104: "8", 105: "9", 106: "*", 107: "+", 109: "-", 110: ".", 111 : "/", 
 24 			112: "f1", 113: "f2", 114: "f3", 115: "f4", 116: "f5", 117: "f6", 118: "f7", 119: "f8", 
 25 			120: "f9", 121: "f10", 122: "f11", 123: "f12", 144: "numlock", 145: "scroll", 191: "/", 224: "meta"
 26 		},
 27 
 28 		shiftNums: {
 29 			"`": "~", "1": "!", "2": "@", "3": "#", "4": "$", "5": "%", "6": "^", "7": "&", 
 30 			"8": "*", "9": "(", "0": ")", "-": "_", "=": "+", ";": ": ", "'": "\"", ",": "<", 
 31 			".": ">",  "/": "?",  "\\": "|"
 32 		}
 33 	};
 34 	
 35 	var defaultOptions = {
 36         key : '',
 37         enabledInInput : false
 38     };
 39 
 40 	function keyHandler( handleObj ) {
 41 		var options = ( typeof handleObj.data == "string" ) ? {key: handleObj.data} : handleObj.data;
 42 		options = jQuery.extend({}, defaultOptions, options);
 43 
 44 		var origHandler = handleObj.handler,
 45 			keys = options.key.toLowerCase().split(" ");
 46 		
 47 		// when no key binding is defined
 48 		if (keys.length === 1 && keys[0] === '') {
 49 		    return;
 50 		}
 51 		
 52 		handleObj.handler = function( event ) {
 53 			var character = String.fromCharCode( event.which ).toLowerCase(),
 54 					isTextInput = (/textarea|select/i.test( event.target.nodeName ) || event.target.type === "text");
 55 			// Don't fire in text-accepting inputs that we didn't directly bind to
 56 			if ( this !== event.target && isTextInput && !options.enabledInInput ) {
 57 				return;
 58 			}
 59 
 60 			// Keypress represents characters, not special keys
 61 			var special = event.type !== "keypress" && jQuery.hotkeys.specialKeys[ event.which ],
 62 				key, modif = "", possible = {};
 63 
 64 			// check combinations (alt|ctrl|shift+anything)
 65 			if ( event.altKey && special !== "alt" ) {
 66 				modif += "alt+";
 67 			}
 68 
 69 			if ( event.ctrlKey && special !== "ctrl" ) {
 70 				modif += "ctrl+";
 71 			}
 72 
 73 			// TODO: Need to make sure this works consistently across platforms
 74 			if ( event.metaKey && !event.ctrlKey && special !== "meta" ) {
 75 				modif += "meta+";
 76 			}
 77 
 78 			if ( event.shiftKey && special !== "shift" ) {
 79 				modif += "shift+";
 80 			}
 81 
 82 			if ( special ) {
 83 				possible[ modif + special ] = true;
 84 
 85 			} else {
 86 				possible[ modif + character ] = true;
 87 				possible[ modif + jQuery.hotkeys.shiftNums[ character ] ] = true;
 88 
 89 				// "$" can be triggered as "Shift+4" or "Shift+$" or just "$"
 90 				if ( modif === "shift+" ) {
 91 					possible[ jQuery.hotkeys.shiftNums[ character ] ] = true;
 92 				}
 93 			}
 94 			for ( var i = 0, l = keys.length; i < l; i++ ) {
 95 				if ( possible[ keys[i] ] ) {
 96 					return origHandler.apply( this, arguments );
 97 				}
 98 			}
 99 		};
100 	}
101 
102 	jQuery.each([ "keydown", "keyup", "keypress" ], function() {
103 		jQuery.event.special[ this ] = { add: keyHandler };
104 	});
105 
106 })( jQuery );
107