svgedit/editor/jquery-svg.js

/* eslint-disable no-var */
/* globals $, jQuery */
/**
 * jQuery module to work with SVG.
 *
 * Licensed under the MIT License
 *
 */

// Dependencies:
// 1) jquery

(function () {
'use strict';

// This fixes $(...).attr() to work as expected with SVG elements.
// Does not currently use *AttributeNS() since we rarely need that.

// See https://api.jquery.com/attr/ for basic documentation of .attr()

// Additional functionality:
// - When getting attributes, a string that's a number is return as type number.
// - If an array is supplied as first parameter, multiple values are returned
// as an object with values for each given attributes

var proxied = jQuery.fn.attr,
	// TODO use NS.SVG instead
	svgns = 'http://www.w3.org/2000/svg';
jQuery.fn.attr = function (key, value) {
	var i, attr;
	var len = this.length;
	if (!len) { return proxied.apply(this, arguments); }
	for (i = 0; i < len; ++i) {
		var elem = this[i];
		// set/get SVG attribute
		if (elem.namespaceURI === svgns) {
			// Setting attribute
			if (value !== undefined) {
				elem.setAttribute(key, value);
			} else if ($.isArray(key)) {
				// Getting attributes from array
				var j = key.length, obj = {};

				while (j--) {
					var aname = key[j];
					attr = elem.getAttribute(aname);
					// This returns a number when appropriate
					if (attr || attr === '0') {
						attr = isNaN(attr) ? attr : (attr - 0);
					}
					obj[aname] = attr;
				}
				return obj;
			}
			if (typeof key === 'object') {
				// Setting attributes form object
				var v;
				for (v in key) {
					elem.setAttribute(v, key[v]);
				}
			// Getting attribute
			} else {
				attr = elem.getAttribute(key);
				if (attr || attr === '0') {
					attr = isNaN(attr) ? attr : (attr - 0);
				}
				return attr;
			}
		} else {
			return proxied.apply(this, arguments);
		}
	}
	return this;
};
}());