/*
 * jQuery touch and gesture detection.
 * 
 * identifies support for touch and gestures.
 * 
 * Usage:  
 * 
 * if ($fn.browserTouchSupport.touches) {
 *     // Touch specific interactions
 * }
 * 
 * Support:
 * bool $.fn.browserTouchSupport.touches  // all touches supported
 * bool $.fn.browserTouchSupport.gestures // all gestures supported
 * bool $.fn.browserTouchSupport.touchstart
 * bool $.fn.browserTouchSupport.touchmove
 * bool $.fn.browserTouchSupport.touchend
 * bool $.fn.browserTouchSupport.gesturestart
 * bool $.fn.browserTouchSupport.gesturechange
 * bool $.fn.browserTouchSupport.gestureend
 * 
 * 
 * @author     Jeffrey Sambells <jeff@tropicalpixels.com>
 * @license    The MIT License
 * 
 * Copyright (c) 2010 Jeffrey Sambells / TropicalPixels
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

(function($) {

	var support = {};

	var events = [
		'touchstart',
		'touchmove',
		'touchend',
		'gesturestart',
		'gesturechange',
		'gestureend'
	];

	var el = document.createElement('div');

	for( i in events ) {
		var eventName = events[i];
		eventName = 'on' + eventName;
		var isSupported = (eventName in el);
		if (!isSupported) {
			el.setAttribute(eventName, 'return;');
			isSupported = typeof el[eventName] == 'function';
		}
		support[events[i]] = isSupported;
	}

	support.touches = 
		support.touchstart 
		&& support.touchend 
		&& support.touchmove;

	support.gestures = 
		support.gesturestart && 
		support.gesturechange && 
		support.gestureend;

	$.fn.browserTouchSupport = support;

})(jQuery);

/*!
 * jQuery UI Touch Punch 0.1.0
 *
 * Copyright 2010, Dave Furfero
 * Dual licensed under the MIT or GPL Version 2 licenses.
 *
 * Depends:
 *  jquery.ui.widget.js
 *  jquery.ui.mouse.js
 */
(function ($) {
  
  if (!$.fn.browserTouchSupport.touches) {
    return;
  }
  

  var mouseProto  = $.ui.mouse.prototype,
      _mouseInit  = mouseProto._mouseInit,
      _mouseDown  = mouseProto._mouseDown,
      _mouseUp    = mouseProto._mouseUp,

      mouseEvents = {
        touchstart: 'mousedown',
        touchmove:  'mousemove',
        touchend:   'mouseup'
      };

  function makeMouseEvent (event) {

    var touch = event.originalEvent.changedTouches[0];

    return $.extend(event, {
      type:    mouseEvents[event.type],
      which:   1,
      pageX:   touch.pageX,
      pageY:   touch.pageY,
      screenX: touch.screenX,
      screenY: touch.screenY,
      clientX: touch.clientX,
      clientY: touch.clientY
    });
  }

  mouseProto._mouseInit = function () {

    var self = this;

    self.element.bind('touchstart.' + self.widgetName, function (event) {
      return self._mouseDown(makeMouseEvent(event));
    });

    _mouseInit.call(self);
  };

  mouseProto._mouseDown = function (event) {

    var self = this,
        ret  = _mouseDown.call(self, event);

    self._touchMoveDelegate = function (event) {
      return self._mouseMove(makeMouseEvent(event));
    };
    
    self._touchEndDelegate = function(event) {
      return self._mouseUp(makeMouseEvent(event));
    };

    $(document)
      .bind('touchmove.' + self.widgetName, self._touchMoveDelegate)
      .bind('touchend.' + self.widgetName, self._touchEndDelegate);

    return ret;
  };

  mouseProto._mouseUp = function (event) {

    var self = this;

    $(document)
      .unbind('touchmove.' + self.widgetName, self._touchMoveDelegate)
      .unbind('touchend.' + self.widgetName, self._touchEndDelegate);

    return _mouseUp.call(self, event);
  };

})(jQuery);