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cleanupEnableBackground.js
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cleanupEnableBackground.js
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const name = 'cleanupEnableBackground'
const type = 'full'
const active = true
const description = 'remove or cleanup enable-background attribute when possible'
const params = {}
/**
* 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
*/
const fn = function (data) {
const regEnableBackground = /^new\s0\s0\s([-+]?\d*\.?\d+([eE][-+]?\d+)?)\s([-+]?\d*\.?\d+([eE][-+]?\d+)?)$/
const elems = [ 'svg', 'mask', 'pattern' ]
let hasFilter = false
function checkEnableBackground (item) {
if (
item.isElem(elems) &&
item.hasAttr('enable-background') &&
item.hasAttr('width') &&
item.hasAttr('height')
) {
const 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
}
const 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')
})
}
export { name, type, active, description, params, fn }