/*

 * 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);

    $input.wrap("<div class='selectbackground'></div>");
    var $wrapper = $input.parent();


    init();



    $input

	.click(function (evt) {
	    if (!inFocus) {
	        $container.toggle();
	        if (!evt.stopPropagation) window.event.cancelBubble = true;
	        else evt.stopPropagation();
	    }

	})

	.focus(function () {

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

	        inFocus = true;

	        $container.show();

	    }

	})

	.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 () {

	    if ($container.is(':visible') && hasfocus > 0) {

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

	    } else {

	        hideMe();

	    }

	});

    $wrapper.click(function (evt) {
        if ($container.not(':visible')) {
            $("." + opt.containerClass).hide();
            $input.focus();
        } else {
            $input.blur();
            hideMe();
        }
    });

    //	$input.parent().click(function (evt) {
    //	    if (!evt.stopPropagation) window.event.cancelBubble = true;
    //	    else evt.stopPropagation();
    //        $input.blur();
    //    });

    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().replace(/\&nbsp\;/gm, ""));

        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().replace(/\&nbsp\;/gm, ""));

                $(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;

    }



};