'use strict';
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exports.type = 'full';
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exports.active = true;
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exports.description = 'removes unused namespaces declaration';
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/**
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* Remove unused namespaces declaration.
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*
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* @param {Object} item current iteration item
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* @return {Boolean} if false, item will be filtered out
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*
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* @author Kir Belevich
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*/
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exports.fn = function(data) {
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var svgElem,
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xmlnsCollection = [];
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/**
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* Remove namespace from collection.
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*
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* @param {String} ns namescape name
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*/
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function removeNSfromCollection(ns) {
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var pos = xmlnsCollection.indexOf(ns);
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// if found - remove ns from the namespaces collection
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if (pos > -1) {
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xmlnsCollection.splice(pos, 1);
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}
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}
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/**
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* Bananas!
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*
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* @param {Array} items input items
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*
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* @return {Array} output items
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*/
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function monkeys(items) {
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var i = 0,
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length = items.content.length;
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while(i < length) {
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var item = items.content[i];
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if (item.isElem('svg')) {
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item.eachAttr(function(attr) {
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// collect namespaces
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if (attr.prefix === 'xmlns' && attr.local) {
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xmlnsCollection.push(attr.local);
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}
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});
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// if svg element has ns-attr
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if (xmlnsCollection.length) {
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// save svg element
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svgElem = item;
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}
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}
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if (xmlnsCollection.length) {
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// check item for the ns-attrs
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if (item.prefix) {
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removeNSfromCollection(item.prefix);
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}
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// check each attr for the ns-attrs
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item.eachAttr(function(attr) {
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removeNSfromCollection(attr.prefix);
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});
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}
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// if nothing is found - go deeper
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if (xmlnsCollection.length && item.content) {
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monkeys(item);
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}
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i++;
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}
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return items;
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}
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data = monkeys(data);
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// remove svg element ns-attributes if they are not used even once
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if (xmlnsCollection.length) {
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xmlnsCollection.forEach(function(name) {
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svgElem.removeAttr('xmlns:' + name);
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});
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}
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return data;
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};
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