/*
Equalizer v1.0.1

Original by Chris Coyier: http://css-tricks.com/equal-height-blocks-in-rows/
from an idea by Stephen Akins: http://stephenakins.blogspot.com/2011/01/uniform-div-heights-for-liquid-css-p.html
with ideas from Mike Avello: https://github.com/madmike1029/matchHeights
converted into a plugin with some improvements by Rob Garrison: https://github.com/Mottie
*/

(function($) {
$.fn.equalizer = function(options) {
var base = {};
$('body').data('Equalizer', base);
base.$el = $(this); // base.$el contains all elements
base.options = $.extend({}, $.equalizerDefaults, options);

base.init = function(){
// Setup sizes
base.options.min = parseInt(base.options.min, 10) || 0;
base.options.max = parseInt(base.options.max, 10) || 0;
base.hasMax = (base.options.max === 0) ? false : true;
base.hasMin = (base.options.min === 0) ? false : true;
base.curRowTop = 0; // current row offset top position

// height to use
base.useHeight = (/^o/.test(base.options.useHeight)) ? 'outerHeight' : /^i/.test(base.options.useHeight) ? 'innerHeight' : 'height';

if (base.options.resizeable) {
// wrap content with a span so we can always get the exact height of the content on resize
// inline styling needed for Chrome; the span must have display:block, or use a div
base.$el.wrapInner('<span class="equalizer-inner" style="display:block;margin:0;padding:0;" />');

// throttled resize columns
$(window).resize(function(){
clearTimeout(base.throttle);
base.throttle = setTimeout(function(){
base.equalz();
}, 100);
});
}

base.equalz();

};

base.equalz = function(){
base.curMax = base.options.min; // current max height

base.$el
.removeClass(base.options.overflow) // removed as it may have changed on resize
.each(function(){
var $this = $(this),
$el = (base.options.resizeable) ? $this.find('span.equalizer-inner') : $this;
// find offset (position relative to document)
base.curTop = $this.offset().top;

// Check for new row
if (base.curRowTop !== base.curTop) {
// New row, so check for max height first
if (base.hasMax && base.curMax > base.options.max) {
base.curMax = base.options.max;
base.curRows.addClass(base.options.overflow);
}
// New row found, set the heights of the previous row
// but ignore the row if not defined (very first element)
if (base.curRows) { base.curRows.height(base.curMax); }
// Set the variables for the new row
base.curMax = $el[base.useHeight]();
base.curMax = (base.hasMin) ? Math.max(base.options.min, base.curMax) : base.curMax;
base.curRowTop = base.curTop;
base.curRows = $this;
} else {
// Same row, continue comparing heights
base.curMax = Math.max(base.curMax, $el[base.useHeight]());
// Check limitations
base.curMax = (base.hasMax && base.curMax > base.options.max) ?
base.options.max :
(base.hasMin && base.curMax < base.options.min) ? base.options.min : base.curMax;
// another div on the current row, add it to the list
base.curRows = base.curRows.add($this);
}
// catch last row
if (base.curRows) {
base.curRows.height(base.curMax);
if (base.hasMax && base.curMax >= base.options.max) {
base.curRows.addClass(base.options.overflow);
}
}
});
};
base.init();
return this; // maintain chainability
};

$.equalizerDefaults = {
// height = type of height to use
// "o" or "outer" = "outerHeight" - includes height + padding + border + margin
// "i" or "inner" = "innerHeight" - includes height + padding + border
// default = "height" - use just the height
useHeight : 'height', // height measurement to use
resizeable: true, // when true, heights are adjusted on window resize
min : 0, // Minimum height applied to all columns
max : 0, // Max height applied to all columns
overflow : 'overflowed' // class applied to columns that are taller than the allowable max
};

})(jQuery);