/*

 * jQuery selectbox plugin

 *

 * Copyright (c) 2007 Sadri Sahraoui (brainfault.com)

 * Licensed under the GPL license and MIT:

 *   http://www.opensource.org/licenses/GPL-license.php
 *   http://www.opensource.org/licenses/mit-license.php

 *

 * The code is inspired from Autocomplete plugin (http://www.dyve.net/jquery/?autocomplete)

 *

 * Revision: $Id$

 * Version: 0.5
 * 
 * Changelog :
 *  Version 0.5 
 *  - separate css style for current selected element and hover element which solve the highlight issue 
 *  Version 0.4
 *  - Fix width when the select is in a hidden div   @Pawel Maziarz
 *  - Add a unique id for generated li to avoid conflict with other selects and empty values @Pawel Maziarz

 */

jQuery.fn.extend({

  selectbox: function(options) {

    return this.each(function() {

      new jQuery.SelectBox(this, options);

    });

  }

});



/* pawel maziarz: work around for ie logging */

if (!window.console) {

  var console = {

    log: function(msg) { 

   }

  }

}

/* */


jQuery.SelectBox = function(selectobj, options) {

  

  var opt = options || {};

  opt.inputClass = opt.inputClass || "selectbox";

  opt.containerClass = opt.containerClass || "selectbox-wrapper";

  opt.hoverClass = opt.hoverClass || "current";
  opt.currentClass = opt.selectedClass || "selected"

  opt.debug = opt.debug || false;

  

  var elm_id = selectobj.id;

  var active = -1;

  var inFocus = false;

  var hasfocus = 0;

  //jquery object for select element

  var $select = $(selectobj);

  // jquery container object

  var $container = setupContainer(opt);

  //jquery input object 

  var $input = setupInput(opt);

  // hide select and append newly created elements

  $select.hide().before($input).before($container);

  
  

  init();

  

  $input

  .click(function(){  
    if ($(this).next().hasClass('actDropdown')) {
      $(this).next().hide();
      $(this).next().removeClass("actDropdown");
    }
    else {
      $(".selectbox-wrapper.actDropdown").hide().removeClass("actDropdown");
      $(this).next().addClass("actDropdown");
      $(this).next().show();
    }
  })

  .focus(function(){

     if ($container.not(':visible')) {

         inFocus = true;

     }

  })

  .keydown(function(event) {     

    switch(event.keyCode) {

      case 38: // up

        event.preventDefault();

        moveSelect(-1);

        break;

      case 40: // down

        event.preventDefault();

        moveSelect(1);

        break;

      //case 9:  // tab 

      case 13: // return

        event.preventDefault(); // seems not working in mac !
        $('li.'+opt.hoverClass).trigger('click');

        break;
      case 27: //escape
        hideMe();
        break;

    }

  })

  .blur(function(event) {
    /*if ($container.is(':visible') && hasfocus > 0 ) {

      if(opt.debug) console.log('container visible and has focus')

    } else {

      hideMe();  

    }*/

  });

  $container.click(function(){
     hideMe();
  });

  

  function hideMe() { 

    hasfocus = 0;

    $container.hide(); 

  }

  

  function init() {

    $container.append(getSelectOptions($input.attr('id'))).hide();
    var width = $input.css('width');

    $container.width(width);

    }

  

  function setupContainer(options) {

    var container = document.createElement("div");

    $container = $(container);

    $container.attr('id', elm_id+'_container');

    $container.addClass(options.containerClass);

    

    return $container;

  }

  

  function setupInput(options) {

    var input = document.createElement("input");

    var $input = $(input);

    $input.attr("id", elm_id+"_input");

    $input.attr("type", "text");

    $input.addClass(options.inputClass);

    $input.attr("autocomplete", "off");

    $input.attr("readonly", "readonly");

    $input.attr("tabIndex", $select.attr("tabindex")); // "I" capital is important for ie

    

    return $input;  

  }

  

  function moveSelect(step) {

    var lis = $("li", $container);

    if (!lis) return;



    active += step;



    if (active < 0) {

      active = 0;

    } else if (active >= lis.size()) {

      active = lis.size() - 1;

    }



    lis.removeClass(opt.hoverClass);



    $(lis[active]).addClass(opt.hoverClass);

  }

  

  function setCurrent() {  

    var li = $("li."+opt.currentClass, $container).get(0);

    var ar = (''+li.id).split('_');

    var el = ar[ar.length-1];

    $select.val(el);

    $input.val($(li).html());

    return true;

  }

  

  // select value

  function getCurrentSelected() {

    return $select.val();

  }

  

  // input value

  function getCurrentValue() {

    return $input.val();

  }

  

  function getSelectOptions(parentid) {

    var select_options = new Array();

    var ul = document.createElement('ul');
    
    $select.children('option').each(function() {

      var li = document.createElement('li');
      li.setAttribute('id', parentid + '_' + $(this).val());

      li.innerHTML = $(this).html();

      if ($(this).is(':selected')) {

        $input.val($(this).html());

        $(li).addClass(opt.currentClass);

      }

      ul.appendChild(li);

      $(li)

      .mouseover(function(event) {

        hasfocus = 1;

        if (opt.debug) console.log('over on : '+this.id);

        jQuery(event.target, $container).addClass(opt.hoverClass);

      })

      .mouseout(function(event) {

        hasfocus = -1;

        if (opt.debug) console.log('out on : '+this.id);

        jQuery(event.target, $container).removeClass(opt.hoverClass);

      })

      .click(function(event) {
        var fl = $('li.'+opt.hoverClass, $container).get(0);

        if (opt.debug) console.log('click on :'+this.id);
        $('li.'+opt.currentClass).removeClass(opt.currentClass); 

        $(this).addClass(opt.currentClass);

        setCurrent();

        hideMe();

      });

    });

    return ul;

  }

  

};