isotope-gutter-width.js

// Modified Isotope methods for gutters in masonry
$.Isotope.prototype._getMasonryGutterColumns = function() {
	var gutter = this.options.masonry && this.options.masonry.gutterWidth || 0;
	containerWidth = this.element.width();

	this.masonry.columnWidth = this.options.masonry && this.options.masonry.columnWidth ||
	// Or use the size of the first item
	this.$filteredAtoms.outerWidth(true) ||
	// If there's no items, use size of container
	containerWidth;

	this.masonry.columnWidth += gutter;

	this.masonry.cols = Math.floor((containerWidth + gutter) / this.masonry.columnWidth);
	this.masonry.cols = Math.max(this.masonry.cols, 1);
};

$.Isotope.prototype._masonryReset = function() {
	// Layout-specific props
	this.masonry = {};
	// FIXME shouldn't have to call this again
	this._getMasonryGutterColumns();
	var i = this.masonry.cols;
	this.masonry.colYs = [];
	while (i--) {
		this.masonry.colYs.push(0);
	}
};

$.Isotope.prototype._masonryResizeChanged = function() {
	var prevSegments = this.masonry.cols;
	// Update cols/rows
	this._getMasonryGutterColumns();
	// Return if updated cols/rows is not equal to previous
	return (this.masonry.cols !== prevSegments);
};