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replace.js
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replace.js
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/**
* Internal dependencies
*/
import { normaliseFormats } from './normalise-formats';
/** @typedef {import('./types').RichTextValue} RichTextValue */
/**
* Search a Rich Text value and replace the match(es) with `replacement`. This
* is similar to `String.prototype.replace`.
*
* @param {RichTextValue} value The value to modify.
* @param {RegExp|string} pattern A RegExp object or literal. Can also be
* a string. It is treated as a verbatim
* string and is not interpreted as a
* regular expression. Only the first
* occurrence will be replaced.
* @param {Function|string} replacement The match or matches are replaced with
* the specified or the value returned by
* the specified function.
*
* @return {RichTextValue} A new value with replacements applied.
*/
export function replace(
{ formats, replacements, text, start, end },
pattern,
replacement
) {
text = text.replace( pattern, ( match, ...rest ) => {
const offset = rest[ rest.length - 2 ];
let newText = replacement;
let newFormats;
let newReplacements;
if ( typeof newText === 'function' ) {
newText = replacement( match, ...rest );
}
if ( typeof newText === 'object' ) {
newFormats = newText.formats;
newReplacements = newText.replacements;
newText = newText.text;
} else {
newFormats = Array( newText.length );
newReplacements = Array( newText.length );
if ( formats[ offset ] ) {
newFormats = newFormats.fill( formats[ offset ] );
}
}
formats = formats
.slice( 0, offset )
.concat( newFormats, formats.slice( offset + match.length ) );
replacements = replacements
.slice( 0, offset )
.concat(
newReplacements,
replacements.slice( offset + match.length )
);
if ( start ) {
start = end = offset + newText.length;
}
return newText;
} );
return normaliseFormats( { formats, replacements, text, start, end } );
}