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[READ-ONLY] Mirror of https://github.com/flo-bit/shapecraft. flo-bit.dev/shapecraft
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at commit da69385e
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159'use strict';
const types = require('../../tokenizer/types.cjs');const charCodeDefinitions = require('../../tokenizer/char-code-definitions.cjs');
const PLUSSIGN = 0x002B; // U+002B PLUS SIGN (+)const HYPHENMINUS = 0x002D; // U+002D HYPHEN-MINUS (-)const QUESTIONMARK = 0x003F; // U+003F QUESTION MARK (?)
function eatHexSequence(offset, allowDash) { let len = 0;
for (let pos = this.tokenStart + offset; pos < this.tokenEnd; pos++) { const code = this.charCodeAt(pos);
if (code === HYPHENMINUS && allowDash && len !== 0) { eatHexSequence.call(this, offset + len + 1, false); return -1; }
if (!charCodeDefinitions.isHexDigit(code)) { this.error( allowDash && len !== 0 ? 'Hyphen minus' + (len < 6 ? ' or hex digit' : '') + ' is expected' : (len < 6 ? 'Hex digit is expected' : 'Unexpected input'), pos ); }
if (++len > 6) { this.error('Too many hex digits', pos); } }
this.next(); return len;}
function eatQuestionMarkSequence(max) { let count = 0;
while (this.isDelim(QUESTIONMARK)) { if (++count > max) { this.error('Too many question marks'); }
this.next(); }}
function startsWith(code) { if (this.charCodeAt(this.tokenStart) !== code) { this.error((code === PLUSSIGN ? 'Plus sign' : 'Hyphen minus') + ' is expected'); }}
// https://drafts.csswg.org/css-syntax/#urange// Informally, the <urange> production has three forms:// U+0001// Defines a range consisting of a single code point, in this case the code point "1".// U+0001-00ff// Defines a range of codepoints between the first and the second value, in this case// the range between "1" and "ff" (255 in decimal) inclusive.// U+00??// Defines a range of codepoints where the "?" characters range over all hex digits,// in this case defining the same as the value U+0000-00ff.// In each form, a maximum of 6 digits is allowed for each hexadecimal number (if you treat "?" as a hexadecimal digit).//// <urange> =// u '+' <ident-token> '?'* |// u <dimension-token> '?'* |// u <number-token> '?'* |// u <number-token> <dimension-token> |// u <number-token> <number-token> |// u '+' '?'+function scanUnicodeRange() { let hexLength = 0;
switch (this.tokenType) { case types.Number: // u <number-token> '?'* // u <number-token> <dimension-token> // u <number-token> <number-token> hexLength = eatHexSequence.call(this, 1, true);
if (this.isDelim(QUESTIONMARK)) { eatQuestionMarkSequence.call(this, 6 - hexLength); break; }
if (this.tokenType === types.Dimension || this.tokenType === types.Number) { startsWith.call(this, HYPHENMINUS); eatHexSequence.call(this, 1, false); break; }
break;
case types.Dimension: // u <dimension-token> '?'* hexLength = eatHexSequence.call(this, 1, true);
if (hexLength > 0) { eatQuestionMarkSequence.call(this, 6 - hexLength); }
break;
default: // u '+' <ident-token> '?'* // u '+' '?'+ this.eatDelim(PLUSSIGN);
if (this.tokenType === types.Ident) { hexLength = eatHexSequence.call(this, 0, true); if (hexLength > 0) { eatQuestionMarkSequence.call(this, 6 - hexLength); } break; }
if (this.isDelim(QUESTIONMARK)) { this.next(); eatQuestionMarkSequence.call(this, 5); break; }
this.error('Hex digit or question mark is expected'); }}
const name = 'UnicodeRange';const structure = { value: String};
function parse() { const start = this.tokenStart;
// U or u this.eatIdent('u'); scanUnicodeRange.call(this);
return { type: 'UnicodeRange', loc: this.getLocation(start, this.tokenStart), value: this.substrToCursor(start) };}
function generate(node) { this.tokenize(node.value);}
exports.generate = generate;exports.name = name;exports.parse = parse;exports.structure = structure;