/*
* SimpleModal 1.3 - jQuery Plugin
* http://www.ericmmartin.com/projects/simplemodal/
* Copyright (c) 2009 Eric Martin
* Dual licensed under the MIT and GPL licenses
* Revision: $Id: jquery.simplemodal.js 205 2009-06-12 13:29:21Z emartin24 $
*/

/**
* SimpleModal is a lightweight jQuery plugin that provides a simple
* interface to create a modal dialog.
*
* The goal of SimpleModal is to provide developers with a cross-browser 
* overlay and container that will be populated with data provided to
* SimpleModal.
*
* There are two ways to call SimpleModal:
* 1) As a chained function on a jQuery object, like $('#myDiv').modal();.
* This call would place the DOM object, #myDiv, inside a modal dialog.
* Chaining requires a jQuery object. An optional options object can be
* passed as a parameter.
*
* @example $('<div>my data</div>').modal({options});
* @example $('#myDiv').modal({options});
* @example jQueryObject.modal({options});
*
* 2) As a stand-alone function, like $.modal(data). The data parameter
* is required and an optional options object can be passed as a second
* parameter. This method provides more flexibility in the types of data 
* that are allowed. The data could be a DOM object, a jQuery object, HTML
* or a string.
* 
* @example $.modal('<div>my data</div>', {options});
* @example $.modal('my data', {options});
* @example $.modal($('#myDiv'), {options});
* @example $.modal(jQueryObject, {options});
* @example $.modal(document.getElementById('myDiv'), {options}); 
* 
* A SimpleModal call can contain multiple elements, but only one modal 
* dialog can be created at a time. Which means that all of the matched
* elements will be displayed within the modal container.
* 
* SimpleModal internally sets the CSS needed to display the modal dialog
* properly in all browsers, yet provides the developer with the flexibility
* to easily control the look and feel. The styling for SimpleModal can be 
* done through external stylesheets, or through SimpleModal, using the
* overlayCss and/or containerCss options.
*
* SimpleModal has been tested in the following browsers:
* - IE 6, 7, 8
* - Firefox 2, 3
* - Opera 9
* - Safari 3
* - Chrome 1, 2
*
* @name SimpleModal
* @type jQuery
* @requires jQuery v1.2.2
* @cat Plugins/Windows and Overlays
* @author Eric Martin (http://ericmmartin.com)
* @version 1.3
*/
; (function ($) {
  var ie6 = $.browser.msie && parseInt($.browser.version) == 6 && typeof window['XMLHttpRequest'] != "object",
		ieQuirks = null,
		w = [];

  /*
  * Stand-alone function to create a modal dialog.
  * 
  * @param {string, object} data A string, jQuery object or DOM object
  * @param {object} [options] An optional object containing options overrides
  */
  $.modal = function (data, options) {
    return $.modal.impl.init(data, options);
  };

  /*
  * Stand-alone close function to close the modal dialog
  */
  $.modal.close = function () {
    $.modal.impl.close();
  };

  /*
  * Chained function to create a modal dialog.
  * 
  * @param {object} [options] An optional object containing options overrides
  */
  $.fn.modal = function (options) {
    return $.modal.impl.init(this, options);
  };

  /*
  * SimpleModal default options
  * 
  * appendTo:		(String:'body') The jQuery selector to append the elements to. For ASP.NET, use 'form'.
  * focus:			(Boolean:true) Forces focus to remain on the modal dialog
  * opacity:			(Number:50) The opacity value for the overlay div, from 0 - 100
  * overlayId:		(String:'simplemodal-overlay') The DOM element id for the overlay div
  * overlayCss:		(Object:{}) The CSS styling for the overlay div
  * containerId:		(String:'simplemodal-container') The DOM element id for the container div
  * containerCss:	(Object:{}) The CSS styling for the container div
  * dataId:			(String:'simplemodal-data') The DOM element id for the data div
  * dataCss:			(Object:{}) The CSS styling for the data div
  * minHeight:		(Number:200) The minimum height for the container
  * minWidth:		(Number:200) The minimum width for the container
  * maxHeight:		(Number:null) The maximum height for the container. If not specified, the window height is used.
  * maxWidth:		(Number:null) The maximum width for the container. If not specified, the window width is used.
  * autoResize:		(Boolean:false) Resize container on window resize? Use with caution - this may have undesirable side-effects.
  * zIndex:			(Number: 1000) Starting z-index value
  * close:			(Boolean:true) If true, closeHTML, escClose and overClose will be used if set.
  If false, none of them will be used.
  * closeHTML:		(String:'<a class="modalCloseImg" title="Close"></a>') The HTML for the 
  default close link. SimpleModal will automatically add the closeClass to this element.
  * closeClass:		(String:'simplemodal-close') The CSS class used to bind to the close event
  * escClose:		(Boolean:true) Allow Esc keypress to close the dialog? 
  * overlayClose:	(Boolean:false) Allow click on overlay to close the dialog?
  * position:		(Array:null) Position of container [top, left]. Can be number of pixels or percentage
  * persist:			(Boolean:false) Persist the data across modal calls? Only used for existing
  DOM elements. If true, the data will be maintained across modal calls, if false,
  the data will be reverted to its original state.
  * onOpen:			(Function:null) The callback function used in place of SimpleModal's open
  * onShow:			(Function:null) The callback function used after the modal dialog has opened
  * onClose:			(Function:null) The callback function used in place of SimpleModal's close
  */
  $.modal.defaults = {
    appendTo: 'body',
    focus: true,
    opacity: 50,
    overlayId: 'simplemodal-overlay',
    overlayCss: {},
    containerId: 'simplemodal-container',
    containerCss: {},
    dataId: 'simplemodal-data',
    dataCss: {},
    minHeight: 200,
    minWidth: 300,
    maxHeight: null,
    maxWidth: null,
    autoResize: false,
    zIndex: 1000,
    close: true,
    closeHTML: '<a class="modalCloseImg" title="Close"></a>',
    closeClass: 'simplemodal-close',
    escClose: true,
    overlayClose: false,
    position: null,
    persist: false,
    onOpen: null,
    onShow: null,
    onClose: null
  };

  /*
  * Main modal object
  */
  $.modal.impl = {
    /*
    * Modal dialog options
    */
    opts: null,
    /*
    * Contains the modal dialog elements and is the object passed 
    * back to the callback (onOpen, onShow, onClose) functions
    */
    dialog: {},
    /*
    * Initialize the modal dialog
    */
    init: function (data, options) {
      // don't allow multiple calls
      if (this.dialog.data) {
        return false;
      }

      // $.boxModel is undefined if checked earlier
      ieQuirks = $.browser.msie && !$.boxModel;

      // merge defaults and user options
      this.opts = $.extend({}, $.modal.defaults, options);

      // keep track of z-index
      this.zIndex = this.opts.zIndex;

      // set the onClose callback flag
      this.occb = false;

      // determine how to handle the data based on its type
      if (typeof data == 'object') {
        // convert DOM object to a jQuery object
        data = data instanceof jQuery ? data : $(data);

        // if the object came from the DOM, keep track of its parent
        if (data.parent().parent().size() > 0) {
          this.dialog.parentNode = data.parent();

          // persist changes? if not, make a clone of the element
          if (!this.opts.persist) {
            this.dialog.orig = data.clone(true);
          }
        }
      }
      else if (typeof data == 'string' || typeof data == 'number') {
        // just insert the data as innerHTML
        data = $('<div/>').html(data);
      }
      else {
        // unsupported data type!
        alert('SimpleModal Error: Unsupported data type: ' + typeof data);
        return false;
      }

      // create the modal overlay, container and, if necessary, iframe
      this.create(data);
      data = null;

      // display the modal dialog
      this.open();

      // useful for adding events/manipulating data in the modal dialog
      if ($.isFunction(this.opts.onShow)) {
        this.opts.onShow.apply(this, [this.dialog]);
      }

      // don't break the chain =)
      return this;
    },
    /*
    * Create and add the modal overlay and container to the page
    */
    create: function (data) {
      // get the window properties
      w = this.getDimensions();

      // add an iframe to prevent select options from bleeding through
      if (ie6) {
        this.dialog.iframe = $('<iframe src="javascript:false;"/>')
					.css($.extend(this.opts.iframeCss, {
					  display: 'none',
					  opacity: 0,
					  position: 'fixed',
					  height: w[0],
					  width: w[1],
					  zIndex: this.opts.zIndex,
					  top: 0,
					  left: 0
					}))
					.appendTo(this.opts.appendTo);
      }

      // create the overlay
      this.dialog.overlay = $('<div/>')
				.attr('id', this.opts.overlayId)
				.addClass('simplemodal-overlay')
				.css($.extend(this.opts.overlayCss, {
				  display: 'none',
				  opacity: this.opts.opacity / 100,
				  height: w[0],
				  width: w[1],
				  position: 'fixed',
				  left: 0,
				  top: 0,
				  zIndex: this.opts.zIndex + 1
				}))
				.appendTo(this.opts.appendTo);

      // create the container
      this.dialog.container = $('<div/>')
				.attr('id', this.opts.containerId)
				.addClass('simplemodal-container')
				.css($.extend(this.opts.containerCss, {
				  display: 'none',
				  position: 'fixed',
				  zIndex: this.opts.zIndex + 2
				}))
				.append(this.opts.close && this.opts.closeHTML
					? $(this.opts.closeHTML).addClass(this.opts.closeClass)
					: '')
				.appendTo(this.opts.appendTo);

      this.dialog.wrap = $('<div/>')
				.attr('tabIndex', -1)
				.addClass('simplemodal-wrap')
				.css({ height: '100%', outline: 0, width: '100%' })
				.appendTo(this.dialog.container);

      // add styling and attributes to the data
      this.dialog.data = data
				.attr('id', data.attr('id') || this.opts.dataId)
				.addClass('simplemodal-data')
				.css($.extend(this.opts.dataCss, {
				  display: 'none'
				}));
      data = null;

      this.setContainerDimensions();
      this.dialog.data.appendTo(this.dialog.wrap);

      // fix issues with IE
      if (ie6 || ieQuirks) {
        this.fixIE();
      }
    },
    /*
    * Bind events
    */
    bindEvents: function () {
      var self = this;

      // bind the close event to any element with the closeClass class
      $('.' + self.opts.closeClass).bind('click.simplemodal', function (e) {
        e.preventDefault();
        self.close();
      });

      // bind the overlay click to the close function, if enabled
      if (self.opts.close && self.opts.overlayClose) {
        self.dialog.overlay.bind('click.simplemodal', function (e) {
          e.preventDefault();
          self.close();
        });
      }

      // bind keydown events
      $(document).bind('keydown.simplemodal', function (e) {
        if (self.opts.focus && e.keyCode == 9) { // TAB
          self.watchTab(e);
        }
        else if ((self.opts.close && self.opts.escClose) && e.keyCode == 27) { // ESC
          e.preventDefault();
          self.close();
        }
      });

      // update window size
      $(window).bind('resize.simplemodal', function () {
        // redetermine the window width/height
        w = self.getDimensions();

        // reposition the dialog
        self.opts.autoResize ? self.setContainerDimensions() : self.setPosition();

        if (ie6 || ieQuirks) {
          self.fixIE();
        }
        else {
          // update the iframe & overlay
          self.dialog.iframe && self.dialog.iframe.css({ height: w[0], width: w[1] });
          self.dialog.overlay.css({ height: w[0], width: w[1] });
        }
      });
    },
    /*
    * Unbind events
    */
    unbindEvents: function () {
      $('.' + this.opts.closeClass).unbind('click.simplemodal');
      $(document).unbind('keydown.simplemodal');
      $(window).unbind('resize.simplemodal');
      this.dialog.overlay.unbind('click.simplemodal');
    },
    /*
    * Fix issues in IE6 and IE7 in quirks mode
    */
    fixIE: function () {
      var p = this.opts.position;

      // simulate fixed position - adapted from BlockUI
      $.each([this.dialog.iframe || null, this.dialog.overlay, this.dialog.container], function (i, el) {
        if (el) {
          var bch = 'document.body.clientHeight', bcw = 'document.body.clientWidth',
						bsh = 'document.body.scrollHeight', bsl = 'document.body.scrollLeft',
						bst = 'document.body.scrollTop', bsw = 'document.body.scrollWidth',
						ch = 'document.documentElement.clientHeight', cw = 'document.documentElement.clientWidth',
						sl = 'document.documentElement.scrollLeft', st = 'document.documentElement.scrollTop',
						s = el[0].style;

          s.position = 'absolute';
          if (i < 2) {
            s.removeExpression('height');
            s.removeExpression('width');
            s.setExpression('height', '' + bsh + ' > ' + bch + ' ? ' + bsh + ' : ' + bch + ' + "px"');
            s.setExpression('width', '' + bsw + ' > ' + bcw + ' ? ' + bsw + ' : ' + bcw + ' + "px"');
          }
          else {
            var te, le;
            if (p && p.constructor == Array) {
              var top = p[0]
								? typeof p[0] == 'number' ? p[0].toString() : p[0].replace(/px/, '')
								: el.css('top').replace(/px/, '');
              te = top.indexOf('%') == -1
								? top + ' + (t = ' + st + ' ? ' + st + ' : ' + bst + ') + "px"'
								: parseInt(top.replace(/%/, '')) + ' * ((' + ch + ' || ' + bch + ') / 100) + (t = ' + st + ' ? ' + st + ' : ' + bst + ') + "px"';

              if (p[1]) {
                var left = typeof p[1] == 'number' ? p[1].toString() : p[1].replace(/px/, '');
                le = left.indexOf('%') == -1
									? left + ' + (t = ' + sl + ' ? ' + sl + ' : ' + bsl + ') + "px"'
									: parseInt(left.replace(/%/, '')) + ' * ((' + cw + ' || ' + bcw + ') / 100) + (t = ' + sl + ' ? ' + sl + ' : ' + bsl + ') + "px"';
              }
            }
            else {
              te = '(' + ch + ' || ' + bch + ') / 2 - (this.offsetHeight / 2) + (t = ' + st + ' ? ' + st + ' : ' + bst + ') + "px"';
              le = '(' + cw + ' || ' + bcw + ') / 2 - (this.offsetWidth / 2) + (t = ' + sl + ' ? ' + sl + ' : ' + bsl + ') + "px"';
            }
            s.removeExpression('top');
            s.removeExpression('left');
            s.setExpression('top', te);
            s.setExpression('left', le);
          }
        }
      });
    },
    focus: function (pos) {
      var self = this,
				p = pos || 'first';

      // focus on dialog or the first visible/enabled input element
      var input = $(':input:enabled:visible:' + p, self.dialog.wrap);
      input.length > 0 ? input.focus() : self.dialog.wrap.focus();
    },
    getDimensions: function () {
      var el = $(window);

      // fix a jQuery/Opera bug with determining the window height
      var h = $.browser.opera && $.browser.version > '9.5' && $.fn.jquery <= '1.2.6' ? document.documentElement['clientHeight'] :
				$.browser.opera && $.browser.version < '9.5' && $.fn.jquery > '1.2.6' ? window.innerHeight :
				el.height();

      return [h, el.width()];
    },
    getVal: function (v) {
      return v == 'auto' ? 0 : parseInt(v.replace(/px/, ''));
    },
    setContainerDimensions: function () {
      // get the dimensions for the container and data
      var ch = this.getVal(this.dialog.container.css('height')), cw = this.dialog.container.width(),
				dh = this.dialog.data.height(), dw = this.dialog.data.width();

      var mh = this.opts.maxHeight && this.opts.maxHeight < w[0] ? this.opts.maxHeight : w[0],
				mw = this.opts.maxWidth && this.opts.maxWidth < w[1] ? this.opts.maxWidth : w[1];

      // height
      if (!ch) {
        if (!dh) { ch = this.opts.minHeight; }
        else {
          if (dh > mh) { ch = mh; }
          else if (dh < this.opts.minHeight) { ch = this.opts.minHeight; }
          else { ch = dh; }
        }
      }
      else {
        ch = ch > mh ? mh : ch;
      }

      // width
      if (!cw) {
        if (!dw) { cw = this.opts.minWidth; }
        else {
          if (dw > mw) { cw = mw; }
          else if (dw < this.opts.minWidth) { cw = this.opts.minWidth; }
          else { cw = dw; }
        }
      }
      else {
        cw = cw > mw ? mw : cw;
      }

      this.dialog.container.css({ height: ch, width: cw });
      if (dh > ch || dw > cw) {
        this.dialog.wrap.css({ overflow: 'auto' });
      }
      this.setPosition();
    },
    setPosition: function () {
      var top, left,
				hc = (w[0] / 2) - ((this.dialog.container.height() || this.dialog.data.height()) / 2),
				vc = (w[1] / 2) - ((this.dialog.container.width() || this.dialog.data.width()) / 2);

      if (this.opts.position && this.opts.position.constructor == Array) {
        top = this.opts.position[0] || hc;
        left = this.opts.position[1] || vc;
      } else {
        top = hc;
        left = vc;
      }
      this.dialog.container.css({ left: left, top: top });
    },
    watchTab: function (e) {
      var self = this;
      if ($(e.target).parents('.simplemodal-container').length > 0) {
        // save the list of inputs
        self.inputs = $(':input:enabled:visible:first, :input:enabled:visible:last', self.dialog.data);

        // if it's the first or last tabbable element, refocus
        if (!e.shiftKey && e.target == self.inputs[self.inputs.length - 1] ||
						e.shiftKey && e.target == self.inputs[0] ||
						self.inputs.length == 0) {
          e.preventDefault();
          var pos = e.shiftKey ? 'last' : 'first';
          setTimeout(function () { self.focus(pos); }, 10);
        }
      }
      else {
        // might be necessary when custom onShow callback is used
        e.preventDefault();
        setTimeout(function () { self.focus(); }, 10);
      }
    },
    /*
    * Open the modal dialog elements
    * - Note: If you use the onOpen callback, you must "show" the 
    *	        overlay and container elements manually 
    *         (the iframe will be handled by SimpleModal)
    */
    open: function () {
      // display the iframe
      this.dialog.iframe && this.dialog.iframe.show();

      if ($.isFunction(this.opts.onOpen)) {
        // execute the onOpen callback 
        this.opts.onOpen.apply(this, [this.dialog]);
      }
      else {
        // display the remaining elements
        this.dialog.overlay.show();
        this.dialog.container.show();
        this.dialog.data.show();
      }

      this.focus();

      // bind default events
      this.bindEvents();
    },
    /*
    * Close the modal dialog
    * - Note: If you use an onClose callback, you must remove the 
    *         overlay, container and iframe elements manually
    *
    * @param {boolean} external Indicates whether the call to this
    *     function was internal or external. If it was external, the
    *     onClose callback will be ignored
    */
    close: function () {
      // prevent close when dialog does not exist
      if (!this.dialog.data) {
        return false;
      }

      // remove the default events
      this.unbindEvents();

      if ($.isFunction(this.opts.onClose) && !this.occb) {
        // set the onClose callback flag
        this.occb = true;

        // execute the onClose callback
        this.opts.onClose.apply(this, [this.dialog]);
      }
      else {
        // if the data came from the DOM, put it back
        if (this.dialog.parentNode) {
          // save changes to the data?
          if (this.opts.persist) {
            // insert the (possibly) modified data back into the DOM
            this.dialog.data.hide().appendTo(this.dialog.parentNode);
          }
          else {
            // remove the current and insert the original, 
            // unmodified data back into the DOM
            this.dialog.data.hide().remove();
            this.dialog.orig.appendTo(this.dialog.parentNode);
          }
        }
        else {
          // otherwise, remove it
          this.dialog.data.hide().remove();
        }

        // remove the remaining elements
        this.dialog.container.hide().remove();
        this.dialog.overlay.hide().remove();
        this.dialog.iframe && this.dialog.iframe.hide().remove();

        // reset the dialog object
        this.dialog = {};
      }
    }
  };
})(jQuery);