Something went wrong. Try again.
[READ-ONLY] Mirror of https://github.com/flo-bit/shapecraft. flo-bit.dev/shapecraft
Something went wrong. Try again.
3.2 kB · 99 lines
JavaScript
at commit 22396844
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100import { isHexDigit, isWhiteSpace, isValidEscape, consumeEscaped, decodeEscaped} from '../tokenizer/index.js';
const REVERSE_SOLIDUS = 0x005c; // U+005C REVERSE SOLIDUS (\)const QUOTATION_MARK = 0x0022; // "const APOSTROPHE = 0x0027; // '
export function decode(str) { const len = str.length; const firstChar = str.charCodeAt(0); const start = firstChar === QUOTATION_MARK || firstChar === APOSTROPHE ? 1 : 0; const end = start === 1 && len > 1 && str.charCodeAt(len - 1) === firstChar ? len - 2 : len - 1; let decoded = '';
for (let i = start; i <= end; i++) { let code = str.charCodeAt(i);
if (code === REVERSE_SOLIDUS) { // special case at the ending if (i === end) { // if the next input code point is EOF, do nothing // otherwise include last quote as escaped if (i !== len - 1) { decoded = str.substr(i + 1); } break; }
code = str.charCodeAt(++i);
// consume escaped if (isValidEscape(REVERSE_SOLIDUS, code)) { const escapeStart = i - 1; const escapeEnd = consumeEscaped(str, escapeStart);
i = escapeEnd - 1; decoded += decodeEscaped(str.substring(escapeStart + 1, escapeEnd)); } else { // \r\n if (code === 0x000d && str.charCodeAt(i + 1) === 0x000a) { i++; } } } else { decoded += str[i]; } }
return decoded;}
// https://drafts.csswg.org/cssom/#serialize-a-string// § 2.1. Common Serializing Idiomsexport function encode(str, apostrophe) { const quote = apostrophe ? '\'' : '"'; const quoteCode = apostrophe ? APOSTROPHE : QUOTATION_MARK; let encoded = ''; let wsBeforeHexIsNeeded = false;
for (let i = 0; i < str.length; i++) { const code = str.charCodeAt(i);
// If the character is NULL (U+0000), then the REPLACEMENT CHARACTER (U+FFFD). if (code === 0x0000) { encoded += '\uFFFD'; continue; }
// If the character is in the range [\1-\1f] (U+0001 to U+001F) or is U+007F, // the character escaped as code point. // Note: Do not compare with 0x0001 since 0x0000 is precessed before if (code <= 0x001f || code === 0x007F) { encoded += '\\' + code.toString(16); wsBeforeHexIsNeeded = true; continue; }
// If the character is '"' (U+0022) or "\" (U+005C), the escaped character. if (code === quoteCode || code === REVERSE_SOLIDUS) { encoded += '\\' + str.charAt(i); wsBeforeHexIsNeeded = false; } else { if (wsBeforeHexIsNeeded && (isHexDigit(code) || isWhiteSpace(code))) { encoded += ' '; }
// Otherwise, the character itself. encoded += str.charAt(i); wsBeforeHexIsNeeded = false; } }
return quote + encoded + quote;}