uBlock/platform/mv3/safe-replace.js

42 lines
1.5 KiB
JavaScript

/*******************************************************************************
uBlock Origin - a comprehensive, efficient content blocker
Copyright (C) 2017-present Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
'use strict';
/******************************************************************************/
export function safeReplace(text, pattern, replacement, count = 1) {
const rePattern = typeof pattern === 'string'
? new RegExp(pattern.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'))
: pattern;
let out = text;
for (;;) {
const match = rePattern.exec(out);
if ( match === null ) { break; }
out = out.slice(0, match.index) +
replacement +
out.slice(match.index + match[0].length);
count -= 1;
if ( count === 0 ) { break; }
}
return out;
}