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'use strict';
exports.type = 'full';
exports.active = true;
exports.description = 'remove or cleanup enable-background attribute when possible';
/**
* Remove or cleanup enable-background attr which coincides with a width/height box.
*
* @see http://www.w3.org/TR/SVG/filters.html#EnableBackgroundProperty
*
* @example
* <svg width="100" height="50" enable-background="new 0 0 100 50">
* ⬇
* <svg width="100" height="50">
*
* @param {Object} item current iteration item
* @return {Boolean} if false, item will be filtered out
*
* @author Kir Belevich
*/
exports.fn = function(data) {
var regEnableBackground = /^new\s0\s0\s([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)\s([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)$/,
hasFilter = false,
elems = ['svg', 'mask', 'pattern'];
function checkEnableBackground(item) {
if (
item.isElem(elems) &&
item.hasAttr('enable-background') &&
item.hasAttr('width') &&
item.hasAttr('height')
) {
var match = item.attr('enable-background').value.match(regEnableBackground);
if (match) {
if (
item.attr('width').value === match[1] &&
item.attr('height').value === match[3]
) {
if (item.isElem('svg')) {
item.removeAttr('enable-background');
} else {
item.attr('enable-background').value = 'new';
}
}
}
}
}
function checkForFilter(item) {
if (item.isElem('filter')) {
hasFilter = true;
}
}
function monkeys(items, fn) {
items.content.forEach(function(item) {
fn(item);
if (item.content) {
monkeys(item, fn);
}
});
return items;
}
var firstStep = monkeys(data, function(item) {
checkEnableBackground(item);
if (!hasFilter) {
checkForFilter(item);
}
});
return hasFilter ? firstStep : monkeys(firstStep, function(item) {
//we don't need 'enable-background' if we have no filters
item.removeAttr('enable-background');
});
};