/******************************************************************************************************************************

 * @ Original idea by by Binny V A, Original version: 2.00.A 
 * @ http://www.openjs.com/scripts/events/keyboard_shortcuts/
 * @ Original License : BSD
 
 * @ jQuery Plugin by Tzury Bar Yochay 
        mail: tzury.by@gmail.com
        blog: evalinux.wordpress.com
        face: facebook.com/profile.php?id=513676303
        
        (c) Copyrights 2007
        
 * @ jQuery Plugin version Beta (0.0.3)
 * @ License: jQuery-License.
 
TODO:
    add queue support (as in gmail) e.g. 'x' then 'y', etc.
    add mouse + mouse wheel events.

USAGE:
    $.hotkeys.add('Ctrl+c', function(){ alert('copy anyone?');});
    $.hotkeys.add('Ctrl+c', {target:'div#editor', type:'keyup', propagate: true},function(){ alert('copy anyone?');});>
    $.hotkeys.remove('Ctrl+c'); 
    $.hotkeys.remove('Ctrl+c', {target:'div#editor', type:'keypress'}); 
    
******************************************************************************************************************************/
(function (jQuery) {

  this.version = '(beta)(0.0.3)';

  this.all = {};

  this.special_keys = {
    27: 'esc', 9: 'tab', 32:'space', 13: 'return', 8:'backspace', 145: 'scroll', 20: 'capslock', 
    144: 'numlock', 19:'pause', 45:'insert', 36:'home', 46:'del',35:'end', 33: 'pageup', 
    34:'pagedown', 37:'left', 38:'up', 39:'right',40:'down', 112:'f1',113:'f2', 114:'f3', 
    115:'f4', 116:'f5', 117:'f6', 118:'f7', 119:'f8', 120:'f9', 121:'f10', 122:'f11', 123:'f12'};        

  this.shift_nums = { "`":"~", "1":"!", "2":"@", "3":"#", "4":"$", "5":"%", "6":"^", "7":"&", 
    "8":"*", "9":"(", "0":")", "-":"_", "=":"+", ";":":", "'":"\"", ",":"<", 
    ".":">",  "/":"?",  "\\":"|" };        

  this.add = function(combi, options, callback) {
    if (jQuery.isFunction(options)) {
      callback = options;
      options = {};
    }
    var opt = {};
    var defaults = {type: 'keydown', propagate: false, disableInInput: false, target: 'html'};
    var that = this;
    var opt = jQuery.extend( opt , defaults, options || {} );
    combi = combi.toLowerCase();        
        
    // inspect if keystroke matches
    var inspector = function(event) {
      event = jQuery.event.fix(event); // jQuery event normalization.
      var selector = event.data.selector;
      var element = jQuery(event.target);

      // Disable shortcut keys in Input, Textarea fields
      if(opt['disableInInput'] && element.is('textarea, input')) {
        return;
      }

      var
        code = event.which,
        type = event.type,
        character = String.fromCharCode(code).toLowerCase(),
        special = that.special_keys[code],
        shift = event.shiftKey,
        ctrl = event.ctrlKey,
        alt= event.altKey,
        propagate = true, // default behaivour
        mapPoint = null;

      var cbMap = that.all[selector].events[type].callbackMap;
      if(!shift && !ctrl && !alt) { // No Modifiers
        mapPoint = cbMap[special] ||  cbMap[character]
      }
      
      // deals with combinaitons (alt|ctrl|shift+anything)
      else{
        var modif = '';
        if(alt) modif +='alt+';
        if(ctrl) modif+= 'ctrl+';
        if(shift) modif += 'shift+';
        // modifiers + special keys or modifiers + characters or modifiers + shift characters
        mapPoint = cbMap[modif+special] || cbMap[modif+character] || cbMap[modif+that.shift_nums[character]]
      }

      if (mapPoint){
        mapPoint.cb(event);
        if(!mapPoint.propagate) {
          event.stopPropagation();
          event.preventDefault();
          return false;
        }
      }
    };

    // first hook for this element
    if (!this.all[opt.target]){
      this.all[opt.target] = {events:{}};
    }
    if (!this.all[opt.target].events[opt.type]){
      this.all[opt.target].events[opt.type] = {callbackMap: {}}
      jQuery(opt.target).bind(opt.type, {selector: opt.target}, inspector);
    }
    this.all[opt.target].events[opt.type].callbackMap[combi] =  {cb: callback, propagate:opt.propagate};                
    return jQuery;
	};    

  this.remove = function(exp, opt) {
    opt = opt || {};
    target = opt.target || 'html';
    type = opt.type || 'keydown';
    exp = exp.toLowerCase();
    jQuery(target).unbind(type);
    delete this.all[target].events[type].callbackMap[exp];
    return jQuery;
	};
	
  jQuery.hotkeys = this;
  return jQuery;    

})(jQuery);