work.suroh.tk/node_modules/postcss/lib/tokenize.js

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JavaScript
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2019-12-02 12:22:45 +00:00
"use strict";
exports.__esModule = true;
exports.default = tokenizer;
var SINGLE_QUOTE = '\''.charCodeAt(0);
var DOUBLE_QUOTE = '"'.charCodeAt(0);
var BACKSLASH = '\\'.charCodeAt(0);
var SLASH = '/'.charCodeAt(0);
var NEWLINE = '\n'.charCodeAt(0);
var SPACE = ' '.charCodeAt(0);
var FEED = '\f'.charCodeAt(0);
var TAB = '\t'.charCodeAt(0);
var CR = '\r'.charCodeAt(0);
var OPEN_SQUARE = '['.charCodeAt(0);
var CLOSE_SQUARE = ']'.charCodeAt(0);
var OPEN_PARENTHESES = '('.charCodeAt(0);
var CLOSE_PARENTHESES = ')'.charCodeAt(0);
var OPEN_CURLY = '{'.charCodeAt(0);
var CLOSE_CURLY = '}'.charCodeAt(0);
var SEMICOLON = ';'.charCodeAt(0);
var ASTERISK = '*'.charCodeAt(0);
var COLON = ':'.charCodeAt(0);
var AT = '@'.charCodeAt(0);
var RE_AT_END = /[ \n\t\r\f{}()'"\\;/[\]#]/g;
var RE_WORD_END = /[ \n\t\r\f(){}:;@!'"\\\][#]|\/(?=\*)/g;
var RE_BAD_BRACKET = /.[\\/("'\n]/;
var RE_HEX_ESCAPE = /[a-f0-9]/i;
function tokenizer(input, options) {
if (options === void 0) {
options = {};
}
var css = input.css.valueOf();
var ignore = options.ignoreErrors;
var code, next, quote, lines, last, content, escape;
var nextLine, nextOffset, escaped, escapePos, prev, n, currentToken;
var length = css.length;
var offset = -1;
var line = 1;
var pos = 0;
var buffer = [];
var returned = [];
function position() {
return pos;
}
function unclosed(what) {
throw input.error('Unclosed ' + what, line, pos - offset);
}
function endOfFile() {
return returned.length === 0 && pos >= length;
}
function nextToken(opts) {
if (returned.length) return returned.pop();
if (pos >= length) return;
var ignoreUnclosed = opts ? opts.ignoreUnclosed : false;
code = css.charCodeAt(pos);
if (code === NEWLINE || code === FEED || code === CR && css.charCodeAt(pos + 1) !== NEWLINE) {
offset = pos;
line += 1;
}
switch (code) {
case NEWLINE:
case SPACE:
case TAB:
case CR:
case FEED:
next = pos;
do {
next += 1;
code = css.charCodeAt(next);
if (code === NEWLINE) {
offset = next;
line += 1;
}
} while (code === SPACE || code === NEWLINE || code === TAB || code === CR || code === FEED);
currentToken = ['space', css.slice(pos, next)];
pos = next - 1;
break;
case OPEN_SQUARE:
case CLOSE_SQUARE:
case OPEN_CURLY:
case CLOSE_CURLY:
case COLON:
case SEMICOLON:
case CLOSE_PARENTHESES:
var controlChar = String.fromCharCode(code);
currentToken = [controlChar, controlChar, line, pos - offset];
break;
case OPEN_PARENTHESES:
prev = buffer.length ? buffer.pop()[1] : '';
n = css.charCodeAt(pos + 1);
if (prev === 'url' && n !== SINGLE_QUOTE && n !== DOUBLE_QUOTE && n !== SPACE && n !== NEWLINE && n !== TAB && n !== FEED && n !== CR) {
next = pos;
do {
escaped = false;
next = css.indexOf(')', next + 1);
if (next === -1) {
if (ignore || ignoreUnclosed) {
next = pos;
break;
} else {
unclosed('bracket');
}
}
escapePos = next;
while (css.charCodeAt(escapePos - 1) === BACKSLASH) {
escapePos -= 1;
escaped = !escaped;
}
} while (escaped);
currentToken = ['brackets', css.slice(pos, next + 1), line, pos - offset, line, next - offset];
pos = next;
} else {
next = css.indexOf(')', pos + 1);
content = css.slice(pos, next + 1);
if (next === -1 || RE_BAD_BRACKET.test(content)) {
currentToken = ['(', '(', line, pos - offset];
} else {
currentToken = ['brackets', content, line, pos - offset, line, next - offset];
pos = next;
}
}
break;
case SINGLE_QUOTE:
case DOUBLE_QUOTE:
quote = code === SINGLE_QUOTE ? '\'' : '"';
next = pos;
do {
escaped = false;
next = css.indexOf(quote, next + 1);
if (next === -1) {
if (ignore || ignoreUnclosed) {
next = pos + 1;
break;
} else {
unclosed('string');
}
}
escapePos = next;
while (css.charCodeAt(escapePos - 1) === BACKSLASH) {
escapePos -= 1;
escaped = !escaped;
}
} while (escaped);
content = css.slice(pos, next + 1);
lines = content.split('\n');
last = lines.length - 1;
if (last > 0) {
nextLine = line + last;
nextOffset = next - lines[last].length;
} else {
nextLine = line;
nextOffset = offset;
}
currentToken = ['string', css.slice(pos, next + 1), line, pos - offset, nextLine, next - nextOffset];
offset = nextOffset;
line = nextLine;
pos = next;
break;
case AT:
RE_AT_END.lastIndex = pos + 1;
RE_AT_END.test(css);
if (RE_AT_END.lastIndex === 0) {
next = css.length - 1;
} else {
next = RE_AT_END.lastIndex - 2;
}
currentToken = ['at-word', css.slice(pos, next + 1), line, pos - offset, line, next - offset];
pos = next;
break;
case BACKSLASH:
next = pos;
escape = true;
while (css.charCodeAt(next + 1) === BACKSLASH) {
next += 1;
escape = !escape;
}
code = css.charCodeAt(next + 1);
if (escape && code !== SLASH && code !== SPACE && code !== NEWLINE && code !== TAB && code !== CR && code !== FEED) {
next += 1;
if (RE_HEX_ESCAPE.test(css.charAt(next))) {
while (RE_HEX_ESCAPE.test(css.charAt(next + 1))) {
next += 1;
}
if (css.charCodeAt(next + 1) === SPACE) {
next += 1;
}
}
}
currentToken = ['word', css.slice(pos, next + 1), line, pos - offset, line, next - offset];
pos = next;
break;
default:
if (code === SLASH && css.charCodeAt(pos + 1) === ASTERISK) {
next = css.indexOf('*/', pos + 2) + 1;
if (next === 0) {
if (ignore || ignoreUnclosed) {
next = css.length;
} else {
unclosed('comment');
}
}
content = css.slice(pos, next + 1);
lines = content.split('\n');
last = lines.length - 1;
if (last > 0) {
nextLine = line + last;
nextOffset = next - lines[last].length;
} else {
nextLine = line;
nextOffset = offset;
}
currentToken = ['comment', content, line, pos - offset, nextLine, next - nextOffset];
offset = nextOffset;
line = nextLine;
pos = next;
} else {
RE_WORD_END.lastIndex = pos + 1;
RE_WORD_END.test(css);
if (RE_WORD_END.lastIndex === 0) {
next = css.length - 1;
} else {
next = RE_WORD_END.lastIndex - 2;
}
currentToken = ['word', css.slice(pos, next + 1), line, pos - offset, line, next - offset];
buffer.push(currentToken);
pos = next;
}
break;
}
pos++;
return currentToken;
}
function back(token) {
returned.push(token);
}
return {
back: back,
nextToken: nextToken,
endOfFile: endOfFile,
position: position
};
}
module.exports = exports.default;
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