/*
* jquery.simulate - simulate browser mouse and keyboard events
*
* Copyright (c) 2007 Eduardo Lundgren (eduardolundgren@gmail.com)
* and Richard D. Worth (rdworth@gmail.com)
*
* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) 
* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
*
*/

; (function($)
{

   $.fn.extend({
      simulate: function(type, options)
      {
         return this.each(function()
         {
            var opt = $.extend({}, $.simulate.defaults, options || {});
            new $.simulate(this, type, opt);
         });
      },
      setHeightExpression: function(fnc)
      {
         return this.each(function()
         {
            new $.setHeightExpression(this, fnc);
         });
      },
      setWidthExpression: function(fnc)
      {
         return this.each(function()
         {
            new $.setWidthExpression(this, fnc);
         });
      }
   });

   $.simulate = function(el, type, options)
   {
      this.target = el;
      this.options = options;

      if (/^drag$/.test(type))
      {
         this[type].apply(this, [this.target, options]);
      } else
      {
         this.simulateEvent(el, type, options);
      }
   }

   $.setHeightExpression = function(el, fnc)
   {
      $(window).bind("resize", { "Expression": fnc, "Element": el }, function(evnt)
      {
         var result = evnt.data.Expression(evnt.data.Element);
         if (typeof (result) != "undefined" && result > 0)
            $(evnt.data.Element).height(result);
      });

      var result = fnc(el);
      if (typeof (result) != "undefined" && result > 0)
         $(el).height(result);
   }

   $.setWidthExpression = function(el, fnc)
   {
      $(window).bind("resize", { "Expression": fnc, "Element": el }, function(evnt)
      {
         var result = evnt.data.Expression(evnt.data.Element);
         if (typeof (result) != "undefined")
            $(evnt.data.Element).width(result);
      });

      var result = fnc(el);
      if (typeof (result) != "undefined" && result > 0)
         $(el).width(result);
   }

   $.extend($.simulate.prototype, {
      simulateEvent: function(el, type, options)
      {
         var evt = this.createEvent(type, options);
         this.dispatchEvent(el, type, evt, options);
         return evt;
      },
      createEvent: function(type, options)
      {
         if (/^mouse(enter|over|out|down|up|move)|(dbl)?click$/.test(type))
         {
            return this.mouseEvent(type, options);
         } else if (/^key(up|down|press)$/.test(type))
         {
            return this.keyboardEvent(type, options);
         }
      },
      mouseEvent: function(type, options)
      {
         var evt;
         var e = $.extend({
            bubbles: true, cancelable: (type != "mousemove"), view: window, detail: 0,
            screenX: 0, screenY: 0, clientX: 0, clientY: 0,
            ctrlKey: false, altKey: false, shiftKey: false, metaKey: false,
            button: 0, relatedTarget: undefined
         }, options);

         var relatedTarget = $(e.relatedTarget)[0];

         if ($.isFunction(document.createEvent))
         {
            evt = document.createEvent("MouseEvents");
            evt.initMouseEvent(type, e.bubbles, e.cancelable, e.view, e.detail,
				e.screenX, e.screenY, e.clientX, e.clientY,
				e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
				e.button, e.relatedTarget || document.body.parentNode);
         } else if (document.createEventObject)
         {
            evt = document.createEventObject();
            $.extend(evt, e);
            evt.button = { 0: 1, 1: 4, 2: 2}[evt.button] || evt.button;
         }
         return evt;
      },
      keyboardEvent: function(type, options)
      {
         var evt;

         var e = $.extend({ bubbles: true, cancelable: true, view: window,
            ctrlKey: false, altKey: false, shiftKey: false, metaKey: false,
            keyCode: 0, charCode: 0
         }, options);

         if ($.isFunction(document.createEvent))
         {
            try
            {
               evt = document.createEvent("KeyEvents");
               evt.initKeyEvent(type, e.bubbles, e.cancelable, e.view,
					e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
					e.keyCode, e.charCode);
            } catch (err)
            {
               evt = document.createEvent("Events");
               evt.initEvent(type, e.bubbles, e.cancelable);
               $.extend(evt, { view: e.view,
                  ctrlKey: e.ctrlKey, altKey: e.altKey, shiftKey: e.shiftKey, metaKey: e.metaKey,
                  keyCode: e.keyCode, charCode: e.charCode
               });
            }
         } else if (document.createEventObject)
         {
            evt = document.createEventObject();
            $.extend(evt, e);
         }
         if ($.browser.msie || $.browser.opera)
         {
            evt.keyCode = (e.charCode > 0) ? e.charCode : e.keyCode;
            evt.charCode = undefined;
         }
         return evt;
      },

      dispatchEvent: function(el, type, evt)
      {
         if (el.dispatchEvent)
         {
            el.dispatchEvent(evt);
         } else if (el.fireEvent)
         {
            el.fireEvent('on' + type, evt);
         }
         return evt;
      },

      drag: function(el)
      {
         var self = this, center = this.findCenter(this.target),
			options = this.options, x = Math.floor(center.x), y = Math.floor(center.y),
			dx = options.dx || 0, dy = options.dy || 0, target = this.target;
         var coord = { clientX: x, clientY: y };
         this.simulateEvent(target, "mousedown", coord);
         coord = { clientX: x + 1, clientY: y + 1 };
         this.simulateEvent(document, "mousemove", coord);
         coord = { clientX: x + dx, clientY: y + dy };
         this.simulateEvent(document, "mousemove", coord);
         this.simulateEvent(document, "mousemove", coord);
         this.simulateEvent(target, "mouseup", coord);
      },
      findCenter: function(el)
      {
         var el = $(this.target), o = el.offset();
         return {
            x: o.left + el.outerWidth() / 2,
            y: o.top + el.outerHeight() / 2
         };
      }
   });

   $.extend($.simulate, {
      defaults: {
         speed: 'sync'
      },
      VK_TAB: 9,
      VK_ENTER: 13,
      VK_ESC: 27,
      VK_PGUP: 33,
      VK_PGDN: 34,
      VK_END: 35,
      VK_HOME: 36,
      VK_LEFT: 37,
      VK_UP: 38,
      VK_RIGHT: 39,
      VK_DOWN: 40
   });

})(jQuery);