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'use strict';
const { inheritableAttrs, elemsGroups } = require('./_collections');
exports.type = 'perItemReverse';
exports.active = true;
exports.description = 'collapses useless groups';
function hasAnimatedAttr(item, name) {
if (item.type === 'element') {
return (
(elemsGroups.animation.includes(item.name) &&
item.attributes.attributeName === name) ||
(item.children.length !== 0 &&
item.children.some((child) => hasAnimatedAttr(child, name)))
);
}
return false;
}
/*
* Collapse useless groups.
*
* @example
*
*
*
*
*
* ⬇
*
*
*
*
*
* ⬇
*
*
* @param {Object} item current iteration item
* @return {Boolean} if false, item will be filtered out
*
* @author Kir Belevich
*/
exports.fn = function (item) {
// non-empty elements
if (
item.type === 'element' &&
item.name !== 'switch' &&
item.children.length !== 0
) {
item.children.forEach(function (g, i) {
// non-empty groups
if (g.type === 'element' && g.name === 'g' && g.children.length !== 0) {
// move group attibutes to the single child element
if (Object.keys(g.attributes).length !== 0 && g.children.length === 1) {
var inner = g.children[0];
if (
inner.type === 'element' &&
inner.attributes.id == null &&
g.attributes.filter == null &&
(g.attributes.class == null || inner.attributes.class == null) &&
((g.attributes['clip-path'] == null && g.attributes.mask == null) ||
(inner.type === 'element' &&
inner.name === 'g' &&
g.attributes.transform == null &&
inner.attributes.transform == null))
) {
for (const [name, value] of Object.entries(g.attributes)) {
if (g.children.some((item) => hasAnimatedAttr(item, name)))
return;
if (inner.attributes[name] == null) {
inner.attributes[name] = value;
} else if (name == 'transform') {
inner.attributes[name] = value + ' ' + inner.attributes[name];
} else if (inner.attributes[name] === 'inherit') {
inner.attributes[name] = value;
} else if (
inheritableAttrs.includes(name) === false &&
inner.attributes[name] !== value
) {
return;
}
delete g.attributes[name];
}
}
}
// collapse groups without attributes
if (
Object.keys(g.attributes).length === 0 &&
!g.children.some((item) => item.isElem(elemsGroups.animation))
) {
item.spliceContent(i, 1, g.children);
}
}
});
}
};