motion
Version:
motion - moving development forward
223 lines (191 loc) • 7.41 kB
JavaScript
;
exports.__esModule = true;
exports['default'] = tokenize;
var SINGLE_QUOTE = 39; // `''
var DOUBLE_QUOTE = 34; // `"'
var BACKSLASH = 92; // `\'
var SLASH = 47; // `/'
var NEWLINE = 10; // `\n'
var SPACE = 32; // ` '
var FEED = 12; // `\f'
var TAB = 9; // `\t'
var CR = 13; // `\r'
var OPEN_PARENTHESES = 40; // `('
var CLOSE_PARENTHESES = 41; // `)'
var OPEN_CURLY = 123; // `{'
var CLOSE_CURLY = 125; // `}'
var SEMICOLON = 59; // `;'
var ASTERICK = 42; // `*'
var COLON = 58; // `:'
var AT = 64; // `@'
var RE_AT_END = /[ \n\t\r\{\(\)'"\\;/]/g;
var RE_WORD_END = /[ \n\t\r\(\)\{\}:;@!'"\\]|\/(?=\*)/g;
var RE_BAD_BRACKET = /.[\\\/\("'\n]/;
function tokenize(input) {
var tokens = [];
var css = input.css.valueOf();
var code = undefined,
next = undefined,
quote = undefined,
lines = undefined,
last = undefined,
content = undefined,
escape = undefined,
nextLine = undefined,
nextOffset = undefined,
escaped = undefined,
escapePos = undefined,
prev = undefined,
n = undefined;
var length = css.length;
var offset = -1;
var line = 1;
var pos = 0;
function unclosed(what) {
throw input.error('Unclosed ' + what, line, pos - offset);
}
while (pos < length) {
code = css.charCodeAt(pos);
if (code === 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);
tokens.push(['space', css.slice(pos, next)]);
pos = next - 1;
break;
case OPEN_CURLY:
tokens.push(['{', '{', line, pos - offset]);
break;
case CLOSE_CURLY:
tokens.push(['}', '}', line, pos - offset]);
break;
case COLON:
tokens.push([':', ':', line, pos - offset]);
break;
case SEMICOLON:
tokens.push([';', ';', line, pos - offset]);
break;
case OPEN_PARENTHESES:
prev = tokens.length ? tokens[tokens.length - 1][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) unclosed('bracket');
escapePos = next;
while (css.charCodeAt(escapePos - 1) === BACKSLASH) {
escapePos -= 1;
escaped = !escaped;
}
} while (escaped);
tokens.push(['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)) {
tokens.push(['(', '(', line, pos - offset]);
} else {
tokens.push(['brackets', content, line, pos - offset, line, next - offset]);
pos = next;
}
}
break;
case CLOSE_PARENTHESES:
tokens.push([')', ')', line, pos - offset]);
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) unclosed('quote');
escapePos = next;
while (css.charCodeAt(escapePos - 1) === BACKSLASH) {
escapePos -= 1;
escaped = !escaped;
}
} while (escaped);
tokens.push(['string', css.slice(pos, next + 1), line, pos - offset, line, next - offset]);
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;
}
tokens.push(['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;
}
tokens.push(['word', css.slice(pos, next + 1), line, pos - offset, line, next - offset]);
pos = next;
break;
default:
if (code === SLASH && css.charCodeAt(pos + 1) === ASTERICK) {
next = css.indexOf('*/', pos + 2) + 1;
if (next === 0) 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;
}
tokens.push(['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;
}
tokens.push(['word', css.slice(pos, next + 1), line, pos - offset, line, next - offset]);
pos = next;
}
break;
}
pos++;
}
return tokens;
}
module.exports = exports['default'];