/*
 * 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: 0.6
 *
 * changelog :
 *  version 0.6
 *  - fix ie scrolling problem
 *  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 = 0;
	var infocus = false;
	var hasfocus = 0;
	//jquery object for select element
	var $select = jquery(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 (!infocus) {
		  $container.toggle();
		}
	})
	.focus(function(){
	   if ($container.not(':visible')) {
	       infocus = true;
	       $container.show();
	   }
	})
	.keydown(function(event) {
		switch(event.keycode) {
			case 38: // up
				event.preventdefault();
				moveselect(-1);
				break;
			case 40: // down
				event.preventdefault();
				moveselect(1);
				break;
			//case 9:  // tab
			case 13: // return
				event.preventdefault(); // seems not working in mac !
				jquery('li.'+opt.hoverclass).trigger('click');
				break;
			case 27: //escape
			  hideme();
			  break;
		}
	})
	.blur(function() {
		if ($container.is(':visible') && hasfocus > 0 ) {
			if(opt.debug) console.log('container visible and has focus')
		} else {
		  // workaround for ie scroll - thanks to bernd matzner
		  if(jquery.browser.msie || jquery.browser.safari){ // check for safari too - workaround for webkit
        if(document.activeelement.getattribute('id').indexof('_container')==-1){
          hideme();
        } else {
          $input.focus();
        }
      } else {
        hideme();
      }
		}
	});


	function hideme() {
		hasfocus = 0;
		$container.hide();
	}

	function init() {
		$container.append(getselectoptions($input.attr('id'))).hide();
	//	var width = $input.css('width');
	//	width = $input.width;
	//	$container.width(width);
    }

	function setupcontainer(options) {
		var container = document.createelement("div");
		$container = jquery(container);
		$container.attr('id', elm_id+'_container');
		$container.addclass(options.containerclass);

		return $container;
	}

	function setupinput(options) {
		var input = document.createelement("input");
		var $input = jquery(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 = jquery("li", $container);
		if (!lis || lis.length == 0) return false;
		active += step;
    //loop through list
		if (active < 0) {
			active = lis.size();
		} else if (active > lis.size()) {
			active = 0;
		}
    scroll(lis, active);
		lis.removeclass(opt.hoverclass);

		jquery(lis[active]).addclass(opt.hoverclass);
	}

	function scroll(list, active) {
      var el = jquery(list[active]).get(0);
      var list = $container.get(0);

      if (el.offsettop + el.offsetheight > list.scrolltop + list.clientheight) {
        list.scrolltop = el.offsettop + el.offsetheight - list.clientheight;
      } else if(el.offsettop < list.scrolltop) {
        list.scrolltop = el.offsettop;
      }
	}

	function setcurrent() {
		var li = jquery("li."+opt.currentclass, $container).get(0);
		var ar = (''+li.id).split('_');
		var el = ar[ar.length-1];
		$select.val(el);
		$input.val(jquery(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 + '_' + jquery(this).val());
			li.innerhtml = jquery(this).html();
			if (jquery(this).is(':selected')) {
				$input.val(jquery(this).html());
				jquery(li).addclass(opt.currentclass);
			}
			ul.appendchild(li);
			jquery(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 = jquery('li.'+opt.hoverclass, $container).get(0);
				if (opt.debug) console.log('click on :'+this.id);
				jquery('li.'+opt.currentclass).removeclass(opt.currentclass);
				jquery(this).addclass(opt.currentclass);
				setcurrent();
				//$select.change();
				$select.get(0).blur();
				hideme();
			});
		});
		return ul;
	}



};