Current File : /home/emergentqj/jugement/wp-content/themes/paperback/js/jquery.matchHeight.js
/**
* jquery.matchHeight.js v0.5.2
* http://brm.io/jquery-match-height/
* License: MIT
*/
;(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;
};
/*
* matchHeight
* plugin definition
*/
var matchHeight = $.fn.matchHeight = function(byRow) {
// handle matchHeight('remove')
if (byRow === 'remove') {
var that = this;
// remove fixed height from all selected elements
this.css('height', '');
// 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;
// byRow default to true
byRow = (typeof byRow !== 'undefined') ? byRow : true;
// keep track of this group so we can re-apply later on load and resize events
matchHeight._groups.push({
elements: this,
byRow: byRow
});
// match each element's height to the tallest element in the selection
matchHeight._apply(this, byRow);
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, byRow) {
var $elements = $(elements),
rows = [$elements];
// take note of scroll position
var scrollTop = $(window).scrollTop(),
htmlHeight = $('html').outerHeight(true);
// temporarily must force hidden parents visible
var $hiddenParents = $elements.parents().filter(':hidden');
$hiddenParents.css('display', 'block');
// get rows if using byRow, otherwise assume one row
if (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') || '')
.css('height', '');
});
}
$.each(rows, function(key, row) {
var $row = $(row),
maxHeight = 0;
// skip apply to rows with only one item
if (byRow && $row.length <= 1)
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)
$that.css({ 'display': display, 'height': '' });
// find the max height (including padding, but not margin)
if ($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('height', maxHeight - verticalPadding);
});
});
// revert hidden parents
$hiddenParents.css('display', '');
// 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.byRow);
});
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);
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