aaac7fed
 liuqimichale
add
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'use strict';
exports.type = 'perItemReverse';
exports.active = true;
exports.description = 'collapses useless groups';
var collections = require('./_collections'),
attrsInheritable = collections.inheritableAttrs,
animationElems = collections.elemsGroups.animation;
function hasAnimatedAttr(item) {
/* jshint validthis:true */
return item.isElem(animationElems) && item.hasAttr('attributeName', this) ||
!item.isEmpty() && item.content.some(hasAnimatedAttr, this);
}
/*
* Collapse useless groups.
*
* @example
* <g>
* <g attr1="val1">
* <path d="..."/>
* </g>
* </g>
* ⬇
* <g>
* <g>
* <path attr1="val1" d="..."/>
* </g>
* </g>
* ⬇
* <path attr1="val1" d="..."/>
*
* @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.isElem() && !item.isElem('switch') && !item.isEmpty()) {
item.content.forEach(function(g, i) {
// non-empty groups
if (g.isElem('g') && !g.isEmpty()) {
// move group attibutes to the single content element
if (g.hasAttr() && g.content.length === 1) {
var inner = g.content[0];
if (inner.isElem() && !inner.hasAttr('id') &&
!(g.hasAttr('class') && inner.hasAttr('class')) && (
!g.hasAttr('clip-path') && !g.hasAttr('mask') ||
inner.isElem('g') && !g.hasAttr('transform') && !inner.hasAttr('transform')
)
) {
g.eachAttr(function(attr) {
if (g.content.some(hasAnimatedAttr, attr.name)) return;
if (!inner.hasAttr(attr.name)) {
inner.addAttr(attr);
} else if (attr.name == 'transform') {
inner.attr(attr.name).value = attr.value + ' ' + inner.attr(attr.name).value;
} else if (
attrsInheritable.indexOf(attr.name) < 0 &&
!inner.hasAttr(attr.name, attr.value)
) {
return;
}
g.removeAttr(attr.name);
});
}
}
// collapse groups without attributes
if (!g.hasAttr() && !g.content.some(function(item) { return item.isElem(animationElems) })) {
item.spliceContent(i, 1, g.content);
}
}
});
}
};
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