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joplin/packages/renderer/stringUtils.js
2020-11-05 16:58:23 +00:00

87 lines
2.0 KiB
JavaScript

const Entities = require('html-entities').AllHtmlEntities;
const htmlentities = new Entities().encode;
function pregQuote(str, delimiter = '') {
return (`${str}`).replace(new RegExp(`[.\\\\+*?\\[\\^\\]$(){}=!<>|:\\${delimiter || ''}-]`, 'g'), '\\$&');
}
function replaceRegexDiacritics(regexString) {
if (!regexString) return '';
const diacriticReplacements = {
a: '[aàáâãäåāą]',
A: '[AÀÁÂÃÄÅĀĄ]',
c: '[cçćč]',
C: '[CÇĆČ]',
d: '[dđď]',
D: '[DĐĎ]',
e: '[eèéêëěēę]',
E: '[EÈÉÊËĚĒĘ]',
i: '[iìíîïī]',
I: '[IÌÍÎÏĪ]',
l: '[lł]',
L: '[LŁ]',
n: '[nñňń]',
N: '[NÑŇŃ]',
o: '[oòóôõöøō]',
O: '[OÒÓÔÕÖØŌ]',
r: '[rř]',
R: '[RŘ]',
s: '[sšś]',
S: '[SŠŚ]',
t: '[tť]',
T: '[TŤ]',
u: '[uùúûüůū]',
U: '[UÙÚÛÜŮŪ]',
y: '[yÿý]',
Y: '[YŸÝ]',
z: '[zžżź]',
Z: '[ZŽŻŹ]',
};
let output = '';
for (let i = 0; i < regexString.length; i++) {
const c = regexString[i];
const r = diacriticReplacements[c];
if (r) {
output += r;
} else {
output += c;
}
}
return output;
}
// keywords can either be a list of strings, or a list of objects with the format:
// { value: 'actualkeyword', type: 'regex/string' }
// The function surrounds the keywords wherever they are, even within other words.
function surroundKeywords(keywords, text, prefix, suffix, options = null) {
options = Object.assign({}, {
escapeHtml: false,
}, options);
if (!keywords.length) return text;
function escapeHtml(s) {
if (!options.escapeHtml) return s;
return htmlentities(s);
}
let regexString = keywords
.map(k => {
if (k.type === 'regex') {
return escapeHtml(replaceRegexDiacritics(k.valueRegex));
} else {
const value = typeof k === 'string' ? k : k.value;
return escapeHtml(replaceRegexDiacritics(pregQuote(value)));
}
})
.join('|');
regexString = `(${regexString})`;
const re = new RegExp(regexString, 'gi');
return text.replace(re, `${prefix}$1${suffix}`);
}
module.exports = { surroundKeywords };