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2 years ago
'use strict';
exports.type = 'perItem';
exports.active = true;
exports.description = 'removes unknown elements content and attributes, removes attrs with default values';
exports.params = {
unknownContent: true,
unknownAttrs: true,
defaultAttrs: true,
uselessOverrides: true,
keepDataAttrs: true,
keepAriaAttrs: true,
keepRoleAttr: false
};
var collections = require('./_collections'),
elems = collections.elems,
attrsGroups = collections.attrsGroups,
elemsGroups = collections.elemsGroups,
attrsGroupsDefaults = collections.attrsGroupsDefaults,
attrsInheritable = collections.inheritableAttrs,
applyGroups = collections.presentationNonInheritableGroupAttrs;
// collect and extend all references
for (var elem in elems) {
elem = elems[elem];
if (elem.attrsGroups) {
elem.attrs = elem.attrs || [];
elem.attrsGroups.forEach(function(attrsGroupName) {
elem.attrs = elem.attrs.concat(attrsGroups[attrsGroupName]);
var groupDefaults = attrsGroupsDefaults[attrsGroupName];
if (groupDefaults) {
elem.defaults = elem.defaults || {};
for (var attrName in groupDefaults) {
elem.defaults[attrName] = groupDefaults[attrName];
}
}
});
}
if (elem.contentGroups) {
elem.content = elem.content || [];
elem.contentGroups.forEach(function(contentGroupName) {
elem.content = elem.content.concat(elemsGroups[contentGroupName]);
});
}
}
/**
* Remove unknown elements content and attributes,
* remove attributes with default values.
*
* @param {Object} item current iteration item
* @param {Object} params plugin params
* @return {Boolean} if false, item will be filtered out
*
* @author Kir Belevich
*/
exports.fn = function(item, params) {
// elems w/o namespace prefix
if (item.isElem() && !item.prefix) {
var elem = item.elem;
// remove unknown element's content
if (
params.unknownContent &&
!item.isEmpty() &&
elems[elem] && // make sure we know of this element before checking its children
elem !== 'foreignObject' // Don't check foreignObject
) {
item.content.forEach(function(content, i) {
if (
content.isElem() &&
!content.prefix &&
(
(
elems[elem].content && // Do we have a record of its permitted content?
elems[elem].content.indexOf(content.elem) === -1
) ||
(
!elems[elem].content && // we dont know about its permitted content
!elems[content.elem] // check that we know about the element at all
)
)
) {
item.content.splice(i, 1);
}
});
}
// remove element's unknown attrs and attrs with default values
if (elems[elem] && elems[elem].attrs) {
item.eachAttr(function(attr) {
if (
attr.name !== 'xmlns' &&
(attr.prefix === 'xml' || !attr.prefix) &&
(!params.keepDataAttrs || attr.name.indexOf('data-') != 0) &&
(!params.keepAriaAttrs || attr.name.indexOf('aria-') != 0) &&
(!params.keepRoleAttr || attr.name != 'role')
) {
if (
// unknown attrs
(
params.unknownAttrs &&
elems[elem].attrs.indexOf(attr.name) === -1
) ||
// attrs with default values
(
params.defaultAttrs &&
!item.hasAttr('id') &&
elems[elem].defaults &&
elems[elem].defaults[attr.name] === attr.value && (
attrsInheritable.indexOf(attr.name) < 0 ||
!item.parentNode.computedAttr(attr.name)
)
) ||
// useless overrides
(
params.uselessOverrides &&
!item.hasAttr('id') &&
applyGroups.indexOf(attr.name) < 0 &&
attrsInheritable.indexOf(attr.name) > -1 &&
item.parentNode.computedAttr(attr.name, attr.value)
)
) {
item.removeAttr(attr.name);
}
}
});
}
}
};