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'use strict';
exports.name = 'removeAttrs';
exports.type = 'visitor';
exports.active = false;
exports.description = 'removes specified attributes';
const DEFAULT_SEPARATOR = ':';
const ENOATTRS = `Warning: The plugin "removeAttrs" requires the "attrs" parameter.
It should have a pattern to remove, otherwise the plugin is a noop.
Config example:
plugins: [
{
name: "removeAttrs",
params: {
attrs: "(fill|stroke)"
}
}
]
`;
/**
* Remove attributes
*
* @example elemSeparator
* format: string
*
* @example preserveCurrentColor
* format: boolean
*
* @example attrs:
*
* format: [ element* : attribute* : value* ]
*
* element : regexp (wrapped into ^...$), single * or omitted > all elements (must be present when value is used)
* attribute : regexp (wrapped into ^...$)
* value : regexp (wrapped into ^...$), single * or omitted > all values
*
* examples:
*
* > basic: remove fill attribute
* ---
* removeAttrs:
* attrs: 'fill'
*
* > remove fill attribute on path element
* ---
* attrs: 'path:fill'
*
* > remove fill attribute on path element where value is none
* ---
* attrs: 'path:fill:none'
*
*
* > remove all fill and stroke attribute
* ---
* attrs:
* - 'fill'
* - 'stroke'
*
* [is same as]
*
* attrs: '(fill|stroke)'
*
* [is same as]
*
* attrs: '*:(fill|stroke)'
*
* [is same as]
*
* attrs: '.*:(fill|stroke)'
*
* [is same as]
*
* attrs: '.*:(fill|stroke):.*'
*
*
* > remove all stroke related attributes
* ----
* attrs: 'stroke.*'
*
*
* @author Benny Schudel
*
* @type {import('../lib/types').Plugin<{
* elemSeparator?: string,
* preserveCurrentColor?: boolean,
* attrs: string | Array<string>
* }>}
*/
exports.fn = (root, params) => {
if (typeof params.attrs == 'undefined') {
console.warn(ENOATTRS);
return null;
}
const elemSeparator =
typeof params.elemSeparator == 'string'
? params.elemSeparator
: DEFAULT_SEPARATOR;
const preserveCurrentColor =
typeof params.preserveCurrentColor == 'boolean'
? params.preserveCurrentColor
: false;
const attrs = Array.isArray(params.attrs) ? params.attrs : [params.attrs];
return {
element: {
enter: (node) => {
for (let pattern of attrs) {
// if no element separators (:), assume it's attribute name, and apply to all elements *regardless of value*
if (pattern.includes(elemSeparator) === false) {
pattern = ['.*', elemSeparator, pattern, elemSeparator, '.*'].join(
''
);
// if only 1 separator, assume it's element and attribute name, and apply regardless of attribute value
} else if (pattern.split(elemSeparator).length < 3) {
pattern = [pattern, elemSeparator, '.*'].join('');
}
// create regexps for element, attribute name, and attribute value
const list = pattern.split(elemSeparator).map((value) => {
// adjust single * to match anything
if (value === '*') {
value = '.*';
}
return new RegExp(['^', value, '$'].join(''), 'i');
});
// matches element
if (list[0].test(node.name)) {
// loop attributes
for (const [name, value] of Object.entries(node.attributes)) {
const isFillCurrentColor =
preserveCurrentColor &&
name == 'fill' &&
value == 'currentColor';
const isStrokeCurrentColor =
preserveCurrentColor &&
name == 'stroke' &&
value == 'currentColor';
if (
!isFillCurrentColor &&
!isStrokeCurrentColor &&
// matches attribute name
list[1].test(name) &&
// matches attribute value
list[2].test(value)
) {
delete node.attributes[name];
}
}
}
}
},
},
};
};