Club Drupal

/**

* jquery.matchHeight.js v0.5.2

* http://brm.io/jquery-match-height/

* License: MIT

* https://github.com/liabru/jquery-match-height

*/

;(function($) {

    /*

    *  internal

    */

    var _previousResizeWidth = -1,

        _updateTimeout = -1;

    /*

    *  _rows

    *  utility function returns array of jQuery selections representing each row

    *  (as displayed after float wrapping applied by browser)

    */

    var _rows = function(elements) {

        var tolerance = 1,

            $elements = $(elements),

            lastTop = null,

            rows = [];

        // group elements by their top position

        $elements.each(function(){

            var $that = $(this),

                top = $that.offset().top - _parse($that.css('margin-top')),

                lastRow = rows.length > 0 ? rows[rows.length - 1] : null;

            if (lastRow === null) {

                // first item on the row, so just push it

                rows.push($that);

            } else {

                // if the row top is the same, add to the row group

                if (Math.floor(Math.abs(lastTop - top)) <= tolerance) {

                    rows[rows.length - 1] = lastRow.add($that);

                } else {

                    // otherwise start a new row group

                    rows.push($that);

                }

            }

            // keep track of the last row top

            lastTop = top;

        });

        return rows;

    };

    /*

    *  _parse

    *  value parse utility function

    */

    var _parse = function(value) {

        // parse value and convert NaN to 0

        return parseFloat(value) || 0;

    };

    /*

    *  _parseOptions

    *  handle plugin options

    */

    var _parseOptions = function(options) {

        var opts = {

            byRow: true,

            remove: false,

            property: 'height'

        };

        if (typeof options === 'object') {

            return $.extend(opts, options);

        }

        if (typeof options === 'boolean') {

            opts.byRow = options;

        } else if (options === 'remove') {

            opts.remove = true;

        }

        return opts;

    };

    /*

    *  matchHeight

    *  plugin definition

    */

    var matchHeight = $.fn.matchHeight = function(options) {

        var opts = _parseOptions(options);

        // handle remove

        if (opts.remove) {

            var that = this;

            // remove fixed height from all selected elements

            this.css(opts.property, '');

            // remove selected elements from all groups

            $.each(matchHeight._groups, function(key, group) {

                group.elements = group.elements.not(that);

            });

            // TODO: cleanup empty groups

            return this;

        }

        if (this.length <= 1)

            return this;

        // keep track of this group so we can re-apply later on load and resize events

        matchHeight._groups.push({

            elements: this,

            options: opts

        });

        // match each element's height to the tallest element in the selection

        matchHeight._apply(this, opts);

        return this;

    };

    /*

    *  plugin global options

    */

    matchHeight._groups = [];

    matchHeight._throttle = 80;

    matchHeight._maintainScroll = false;

    matchHeight._beforeUpdate = null;

    matchHeight._afterUpdate = null;

    /*

    *  matchHeight._apply

    *  apply matchHeight to given elements

    */

    matchHeight._apply = function(elements, options) {

        var opts = _parseOptions(options),

            $elements = $(elements),

            rows = [$elements];

        // take note of scroll position

        var scrollTop = $(window).scrollTop(),

            htmlHeight = $('html').outerHeight(true);

        // get hidden parents

        var $hiddenParents = $elements.parents().filter(':hidden');

        // cache the original inline style

        $hiddenParents.each(function() {

            var $that = $(this);

            $that.data('style-cache', $that.attr('style'));

        });

        // temporarily must force hidden parents visible

        $hiddenParents.css('display', 'block');

        // get rows if using byRow, otherwise assume one row

        if (opts.byRow) {

            // must first force an arbitrary equal height so floating elements break evenly

            $elements.each(function() {

                var $that = $(this),

                    display = $that.css('display') === 'inline-block' ? 'inline-block' : 'block';

                // cache the original inline style

                $that.data('style-cache', $that.attr('style'));

                $that.css({

                    'display': display,

                    'padding-top': '0',

                    'padding-bottom': '0',

                    'margin-top': '0',

                    'margin-bottom': '0',

                    'border-top-width': '0',

                    'border-bottom-width': '0',

                    'height': '100px'

                });

            });

            // get the array of rows (based on element top position)

            rows = _rows($elements);

            // revert original inline styles

            $elements.each(function() {

                var $that = $(this);

                $that.attr('style', $that.data('style-cache') || '');

            });

        }

        $.each(rows, function(key, row) {

            var $row = $(row),

                maxHeight = 0;

            // skip apply to rows with only one item

            if (opts.byRow && $row.length <= 1) {

                $row.css(opts.property, '');

                return;

            }

            // iterate the row and find the max height

            $row.each(function(){

                var $that = $(this),

                    display = $that.css('display') === 'inline-block' ? 'inline-block' : 'block';

                // ensure we get the correct actual height (and not a previously set height value)

                var css = { 'display': display };

                css[opts.property] = '';

                $that.css(css);

                // find the max height (including padding, but not margin)

                if ($that.outerHeight(false) > maxHeight)

                    maxHeight = $that.outerHeight(false);

                // revert display block

                $that.css('display', '');

            });

            // iterate the row and apply the height to all elements

            $row.each(function(){

                var $that = $(this),

                    verticalPadding = 0;

                // handle padding and border correctly (required when not using border-box)

                if ($that.css('box-sizing') !== 'border-box') {

                    verticalPadding += _parse($that.css('border-top-width')) + _parse($that.css('border-bottom-width'));

                    verticalPadding += _parse($that.css('padding-top')) + _parse($that.css('padding-bottom'));

                }

                // set the height (accounting for padding and border)

                $that.css(opts.property, maxHeight - verticalPadding);

            });

        });

        // revert hidden parents

        $hiddenParents.each(function() {

            var $that = $(this);

            $that.attr('style', $that.data('style-cache') || null);

        });

        // restore scroll position if enabled

        if (matchHeight._maintainScroll)

            $(window).scrollTop((scrollTop / htmlHeight) * $('html').outerHeight(true));

        return this;

    };

    /*

    *  matchHeight._applyDataApi

    *  applies matchHeight to all elements with a data-match-height attribute

    */

    matchHeight._applyDataApi = function() {

        var groups = {};

        // generate groups by their groupId set by elements using data-match-height

        $('[data-match-height], [data-mh]').each(function() {

            var $this = $(this),

                groupId = $this.attr('data-match-height') || $this.attr('data-mh');

            if (groupId in groups) {

                groups[groupId] = groups[groupId].add($this);

            } else {

                groups[groupId] = $this;

            }

        });

        // apply matchHeight to each group

        $.each(groups, function() {

            this.matchHeight(true);

        });

    };

    /*

    *  matchHeight._update

    *  updates matchHeight on all current groups with their correct options

    */

    var _update = function(event) {

        if (matchHeight._beforeUpdate)

            matchHeight._beforeUpdate(event, matchHeight._groups);

        $.each(matchHeight._groups, function() {

            matchHeight._apply(this.elements, this.options);

        });

        if (matchHeight._afterUpdate)

            matchHeight._afterUpdate(event, matchHeight._groups);

    };

    matchHeight._update = function(throttle, event) {

        // prevent update if fired from a resize event

        // where the viewport width hasn't actually changed

        // fixes an event looping bug in IE8

        if (event && event.type === 'resize') {

            var windowWidth = $(window).width();

            if (windowWidth === _previousResizeWidth)

                return;

            _previousResizeWidth = windowWidth;

        }

        // throttle updates

        if (!throttle) {

            _update(event);

        } else if (_updateTimeout === -1) {

            _updateTimeout = setTimeout(function() {

                _update(event);

                _updateTimeout = -1;

            }, matchHeight._throttle);

        }

    };

    /*

    *  bind events

    */

    // apply on DOM ready event

    $(matchHeight._applyDataApi);

    // update heights on load and resize events

    $(window).bind('load', function(event) {

        matchHeight._update(false, event);

    });

    // throttled update heights on resize events

    $(window).bind('resize orientationchange', function(event) {

        matchHeight._update(true, event);

    });

})(jQuery);

// Added on to trigger the script above and give equal heights to some Mayo columns.

(function ($) {

  $(document).ready(function() {

    $('#top-columns .column-block').matchHeight();

    $('#bottom-columns .column-block').matchHeight();

  });

})(jQuery);