/*
 * fixHeight - jQuery Plugin
 * http://www.starryworks.co.jp/blog/tips/javascript/fixheightjs.html
 *
 * Author Koji Kimura @ STARRYWORKS inc.
 * http://www.starryworks.co.jp/
 * 
 * Licensed under the MIT License
 *
 */


(function($){

var isInitialized = false;
var parents = [];
var textHeight = 0;
var $fontSizeDiv;

$.fn.fixHeight = function() {
this.each(function(){
var childrenGroups = getChildren( this );

$.each( childrenGroups, function(){

var $children = $(this);
if ( !$children.filter(":visible").length ) return;

var row = [];
var top = 0;
$children.each(function(){
if ( top != $(this).position().top ) {
$(row).sameHeight();
row = [];
top = $(this).position().top;
}
row.push(this);
});
if ( row.length ) $(row).sameHeight();
});


});
init();
return this;
}

$.checkFixHeight = function( i_force ) {
if ( $fontSizeDiv.height() == textHeight && i_force !== true ) return;
textHeight = $fontSizeDiv.height();
$(parents).fixHeight();
}

$.fn.sameHeight = function() {
var maxHeight = 0;
this.css("height","auto");
this.each(function(){
if ( $(this).height() > maxHeight ) maxHeight = $(this).height();
});
return this.height(maxHeight);
}

function getChildren( i_parent ) {
var $parent = $( i_parent );

if ( $parent.data("fixHeightChildrenGroups") ) return $parent.data("fixHeightChildrenGroups");
var childrenGroups = [];

var $children = $parent.find(".fixHeightChild");
if ( $children.length ) childrenGroups.push( $children );

var $groupedChildren = $parent.find("*[class*='fixHeightChild']:not(.fixHeightChild)");
if ( $groupedChildren.length ) {
var classNames = {};
$groupedChildren.each(function(){
var a = $(this).attr("class").split(" ");
var i;
var l = a.length;
var c;
for ( i=0; i<l; i++ ) {
c = a[i].match(/fixHeightChild[a-z0-9_-]+/i);
if ( !c ) continue;
c = c.toString();
if ( c ) classNames[c] = c;
}
});
for ( var c in classNames ) childrenGroups.push( $parent.find("."+c) );
}

if ( !childrenGroups.length ) {
$children = $parent.children();
if ( $children.length ) childrenGroups.push( $children );
}

$parent.data("fixHeightChildrenGroups", childrenGroups );
parents.push( $parent );

return childrenGroups;
}


function init() {
if ( isInitialized ) return;
isInitialized = true;
$fontSizeDiv = $(document).append('<div style="position:absolute;left:-9999px;top:-9999px;">s</div>');
setInterval($.checkFixHeight,1000);
$(window).resize($.checkFixHeight);
$.checkFixHeight();
$(window).load( function(){ $.checkFixHeight(true); } );
}

})(jQuery);



jQuery(document).ready(function(){
$(".fixHeight").fixHeight();
});