92 lines
2.8 KiB
JavaScript
92 lines
2.8 KiB
JavaScript
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'use strict';
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exports.type = 'perItemReverse';
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exports.active = true;
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exports.description = 'collapses useless groups';
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var collections = require('./_collections'),
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attrsInheritable = collections.inheritableAttrs,
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animationElems = collections.elemsGroups.animation;
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function hasAnimatedAttr(item) {
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/* jshint validthis:true */
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return item.isElem(animationElems) && item.hasAttr('attributeName', this) ||
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!item.isEmpty() && item.content.some(hasAnimatedAttr, this);
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}
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/*
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* Collapse useless groups.
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*
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* @example
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* <g>
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* <g attr1="val1">
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* <path d="..."/>
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* </g>
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* </g>
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* ⬇
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* <g>
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* <g>
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* <path attr1="val1" d="..."/>
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* </g>
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* </g>
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* ⬇
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* <path attr1="val1" d="..."/>
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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(item) {
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// non-empty elements
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if (item.isElem() && !item.isElem('switch') && !item.isEmpty()) {
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item.content.forEach(function(g, i) {
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// non-empty groups
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if (g.isElem('g') && !g.isEmpty()) {
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// move group attibutes to the single content element
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if (g.hasAttr() && g.content.length === 1) {
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var inner = g.content[0];
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if (inner.isElem() && !inner.hasAttr('id') &&
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!(g.hasAttr('class') && inner.hasAttr('class')) && (
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!g.hasAttr('clip-path') && !g.hasAttr('mask') ||
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inner.isElem('g') && !g.hasAttr('transform') && !inner.hasAttr('transform')
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)
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) {
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g.eachAttr(function(attr) {
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if (g.content.some(hasAnimatedAttr, attr.name)) return;
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if (!inner.hasAttr(attr.name)) {
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inner.addAttr(attr);
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} else if (attr.name == 'transform') {
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inner.attr(attr.name).value = attr.value + ' ' + inner.attr(attr.name).value;
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} else if (
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attrsInheritable.indexOf(attr.name) < 0 &&
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!inner.hasAttr(attr.name, attr.value)
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) {
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return;
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}
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g.removeAttr(attr.name);
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});
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}
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}
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// collapse groups without attributes
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if (!g.hasAttr() && !g.content.some(function(item) { return item.isElem(animationElems) })) {
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item.spliceContent(i, 1, g.content);
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}
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}
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});
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}
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};
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