/*
 * 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: 1.0
 * 
 * Changelog :
 *  Version 1.0
 *  - Support jQuery noConflict option
 *  - Add callback for onChange event, thanks to Jason
 *  - Fix IE8 support
 *  - Fix auto width support
 *  - Fix focus on firefox dont show the carret
 *  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 || {};
	//!!! Change me to adjust when the text gets truncated
	var truncateLength = opt.truncateLength || 60;
	opt.inputClass = opt.inputClass || "selectbox";
	opt.containerClass = opt.containerClass || "selectbox-wrapper";
	opt.hoverClass = opt.hoverClass || "current";
	opt.currentClass = opt.currentClass || "selected";
    opt.onChangeCallback = opt.onChangeCallback || false;
    opt.onChangeParams = opt.onChangeParams || false;
	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;
	       $container.show();
           //$container.focus();
	   }
	})
	.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 {
		  // Workaround for ie scroll - thanks to Bernd Matzner
            if((jQuery.browser.msie && jQuery.browser.version.substr(0,1) < 8)){ // check for safari too - workaround for webkit || jQuery.browser.safari
                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 = $input.css('width');
		//$container.width(width);
    }
	
	function setupContainer(options) {
		var container = document.createElement("div");
		$container = jQuery(container);
		$container.attr('id', elm_id+'_container');
		$container.addClass(options.containerClass);
        $container.css('display', 'none');
		
		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", $select.attr("tabindex")); // "I" capital is important for ie
        //$input.css("width", $select.css("width"));
		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);
        $select.get(0).selectedIndex = $('li', $container).index(li);
		  var clone = $(li).clone();
		  clone.truncate(truncateLength);
			$input.val($(clone).text());
        opt.onChangeParams = { selectedVal : $select.val() };
        if (opt.onChangeCallback) opt.onChangeCallback(opt.onChangeParams);
		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')) {
		  var clone = $(li).clone();
		  clone.truncate(truncateLength);
			$input.val($(clone).text());
				$(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, $container).removeClass(opt.currentClass); 
				$(this).addClass(opt.currentClass);
				setCurrent();
				//$select.change();
				$select.get(0).blur();
				hideMe();
			});
		});
		return ul;
	}
	
	
	
};

jQuery.fn.truncate = function( max, settings ) {
    settings = jQuery.extend( {
        chars: /\s/,
        trail: [ "...", "" ]
    }, settings );
    var myResults = {};
    var ie = $.browser.msie;
    function fixIE( o ) {
        if ( ie ) {
            o.style.removeAttribute( "filter" );
        }
    }
    return this.each( function() {
        var $this = jQuery(this);
        var myStrOrig = $this.html().replace( /\r\n/gim, "" );
        var myStr = myStrOrig;
        var myRegEx = /<\/?[^<>]*\/?>/gim;
        var myRegExArray;
        var myRegExHash = {};
        var myResultsKey = $("*").index( this );
        while ( ( myRegExArray = myRegEx.exec( myStr ) ) != null ) {
            myRegExHash[ myRegExArray.index ] = myRegExArray[ 0 ];
        }
        myStr = jQuery.trim( myStr.split( myRegEx ).join( "" ) );
        if ( myStr.length > max ) {
            var c;
            while ( max < myStr.length ) {
                c = myStr.charAt( max );
                if ( c.match( settings.chars ) ) {
                    myStr = myStr.substring( 0, max );
                    break;
                }
                max--;
            }
            if ( myStrOrig.search( myRegEx ) != -1 ) {
                var endCap = 0;
                for ( eachEl in myRegExHash ) {
                    myStr = [ myStr.substring( 0, eachEl ), myRegExHash[ eachEl ], myStr.substring( eachEl, myStr.length ) ].join( "" );
                    if ( eachEl < myStr.length ) {
                        endCap = myStr.length;
                    }
                }
                $this.html( [ myStr.substring( 0, endCap ), myStr.substring( endCap, myStr.length ).replace( /<(\w+)[^>]*>.*<\/\1>/gim, "" ).replace( /<(br|hr|img|input)[^<>]*\/?>/gim, "" ) ].join( "" ) );
            } else {
                $this.html( myStr );
            }
            myResults[ myResultsKey ] = myStrOrig;
            $this.html( [ "<div class='truncate_less'>", $this.html(), settings.trail[ 0 ], "</div>" ].join( "" ) )
            .find(".truncate_show",this).click( function() {
                if ( $this.find( ".truncate_more" ).length == 0 ) {
                    $this.append( [ "<div class='truncate_more' style='display: none;'>", myResults[ myResultsKey ], settings.trail[ 1 ], "</div>" ].join( "" ) )
                    .find( ".truncate_hide" ).click( function() {
                        $this.find( ".truncate_more" ).css( "background", "#fff" ).fadeOut( "normal", function() {
                            $this.find( ".truncate_less" ).css( "background", "#fff" ).fadeIn( "normal", function() {
                                fixIE( this );
                                $(this).css( "background", "none" );
                            });
                            fixIE( this );
                        });
                        return false;
                    });
                }
                $this.find( ".truncate_less" ).fadeOut( "normal", function() {
                    $this.find( ".truncate_more" ).fadeIn( "normal", function() {
                        fixIE( this );
                    });
                    fixIE( this );
                });
                jQuery(".truncate_show",$this).click( function() {
                    $this.find( ".truncate_less" ).css( "background", "#fff" ).fadeOut( "normal", function() {
                        $this.find( ".truncate_more" ).css( "background", "#fff" ).fadeIn( "normal", function() {
                            fixIE( this );
                            $(this).css( "background", "none" );
                        });
                        fixIE( this );
                    });
                    return false;
                });
                return false;
            });
        }
    });
};