tokenize.js 31 KB

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  1. "use strict";
  2. exports.__esModule = true;
  3. exports.default = tokenizer;
  4. var SINGLE_QUOTE = '\''.charCodeAt(0);
  5. var DOUBLE_QUOTE = '"'.charCodeAt(0);
  6. var BACKSLASH = '\\'.charCodeAt(0);
  7. var SLASH = '/'.charCodeAt(0);
  8. var NEWLINE = '\n'.charCodeAt(0);
  9. var SPACE = ' '.charCodeAt(0);
  10. var FEED = '\f'.charCodeAt(0);
  11. var TAB = '\t'.charCodeAt(0);
  12. var CR = '\r'.charCodeAt(0);
  13. var OPEN_SQUARE = '['.charCodeAt(0);
  14. var CLOSE_SQUARE = ']'.charCodeAt(0);
  15. var OPEN_PARENTHESES = '('.charCodeAt(0);
  16. var CLOSE_PARENTHESES = ')'.charCodeAt(0);
  17. var OPEN_CURLY = '{'.charCodeAt(0);
  18. var CLOSE_CURLY = '}'.charCodeAt(0);
  19. var SEMICOLON = ';'.charCodeAt(0);
  20. var ASTERISK = '*'.charCodeAt(0);
  21. var COLON = ':'.charCodeAt(0);
  22. var AT = '@'.charCodeAt(0);
  23. var RE_AT_END = /[ \n\t\r\f{}()'"\\;/[\]#]/g;
  24. var RE_WORD_END = /[ \n\t\r\f(){}:;@!'"\\\][#]|\/(?=\*)/g;
  25. var RE_BAD_BRACKET = /.[\\/("'\n]/;
  26. var RE_HEX_ESCAPE = /[a-f0-9]/i;
  27. function tokenizer(input, options) {
  28. if (options === void 0) {
  29. options = {};
  30. }
  31. var css = input.css.valueOf();
  32. var ignore = options.ignoreErrors;
  33. var code, next, quote, lines, last, content, escape;
  34. var nextLine, nextOffset, escaped, escapePos, prev, n, currentToken;
  35. var length = css.length;
  36. var offset = -1;
  37. var line = 1;
  38. var pos = 0;
  39. var buffer = [];
  40. var returned = [];
  41. function unclosed(what) {
  42. throw input.error('Unclosed ' + what, line, pos - offset);
  43. }
  44. function endOfFile() {
  45. return returned.length === 0 && pos >= length;
  46. }
  47. function nextToken(opts) {
  48. if (returned.length) return returned.pop();
  49. if (pos >= length) return;
  50. var ignoreUnclosed = opts ? opts.ignoreUnclosed : false;
  51. code = css.charCodeAt(pos);
  52. if (code === NEWLINE || code === FEED || code === CR && css.charCodeAt(pos + 1) !== NEWLINE) {
  53. offset = pos;
  54. line += 1;
  55. }
  56. switch (code) {
  57. case NEWLINE:
  58. case SPACE:
  59. case TAB:
  60. case CR:
  61. case FEED:
  62. next = pos;
  63. do {
  64. next += 1;
  65. code = css.charCodeAt(next);
  66. if (code === NEWLINE) {
  67. offset = next;
  68. line += 1;
  69. }
  70. } while (code === SPACE || code === NEWLINE || code === TAB || code === CR || code === FEED);
  71. currentToken = ['space', css.slice(pos, next)];
  72. pos = next - 1;
  73. break;
  74. case OPEN_SQUARE:
  75. case CLOSE_SQUARE:
  76. case OPEN_CURLY:
  77. case CLOSE_CURLY:
  78. case COLON:
  79. case SEMICOLON:
  80. case CLOSE_PARENTHESES:
  81. var controlChar = String.fromCharCode(code);
  82. currentToken = [controlChar, controlChar, line, pos - offset];
  83. break;
  84. case OPEN_PARENTHESES:
  85. prev = buffer.length ? buffer.pop()[1] : '';
  86. n = css.charCodeAt(pos + 1);
  87. if (prev === 'url' && n !== SINGLE_QUOTE && n !== DOUBLE_QUOTE && n !== SPACE && n !== NEWLINE && n !== TAB && n !== FEED && n !== CR) {
  88. next = pos;
  89. do {
  90. escaped = false;
  91. next = css.indexOf(')', next + 1);
  92. if (next === -1) {
  93. if (ignore || ignoreUnclosed) {
  94. next = pos;
  95. break;
  96. } else {
  97. unclosed('bracket');
  98. }
  99. }
  100. escapePos = next;
  101. while (css.charCodeAt(escapePos - 1) === BACKSLASH) {
  102. escapePos -= 1;
  103. escaped = !escaped;
  104. }
  105. } while (escaped);
  106. currentToken = ['brackets', css.slice(pos, next + 1), line, pos - offset, line, next - offset];
  107. pos = next;
  108. } else {
  109. next = css.indexOf(')', pos + 1);
  110. content = css.slice(pos, next + 1);
  111. if (next === -1 || RE_BAD_BRACKET.test(content)) {
  112. currentToken = ['(', '(', line, pos - offset];
  113. } else {
  114. currentToken = ['brackets', content, line, pos - offset, line, next - offset];
  115. pos = next;
  116. }
  117. }
  118. break;
  119. case SINGLE_QUOTE:
  120. case DOUBLE_QUOTE:
  121. quote = code === SINGLE_QUOTE ? '\'' : '"';
  122. next = pos;
  123. do {
  124. escaped = false;
  125. next = css.indexOf(quote, next + 1);
  126. if (next === -1) {
  127. if (ignore || ignoreUnclosed) {
  128. next = pos + 1;
  129. break;
  130. } else {
  131. unclosed('string');
  132. }
  133. }
  134. escapePos = next;
  135. while (css.charCodeAt(escapePos - 1) === BACKSLASH) {
  136. escapePos -= 1;
  137. escaped = !escaped;
  138. }
  139. } while (escaped);
  140. content = css.slice(pos, next + 1);
  141. lines = content.split('\n');
  142. last = lines.length - 1;
  143. if (last > 0) {
  144. nextLine = line + last;
  145. nextOffset = next - lines[last].length;
  146. } else {
  147. nextLine = line;
  148. nextOffset = offset;
  149. }
  150. currentToken = ['string', css.slice(pos, next + 1), line, pos - offset, nextLine, next - nextOffset];
  151. offset = nextOffset;
  152. line = nextLine;
  153. pos = next;
  154. break;
  155. case AT:
  156. RE_AT_END.lastIndex = pos + 1;
  157. RE_AT_END.test(css);
  158. if (RE_AT_END.lastIndex === 0) {
  159. next = css.length - 1;
  160. } else {
  161. next = RE_AT_END.lastIndex - 2;
  162. }
  163. currentToken = ['at-word', css.slice(pos, next + 1), line, pos - offset, line, next - offset];
  164. pos = next;
  165. break;
  166. case BACKSLASH:
  167. next = pos;
  168. escape = true;
  169. while (css.charCodeAt(next + 1) === BACKSLASH) {
  170. next += 1;
  171. escape = !escape;
  172. }
  173. code = css.charCodeAt(next + 1);
  174. if (escape && code !== SLASH && code !== SPACE && code !== NEWLINE && code !== TAB && code !== CR && code !== FEED) {
  175. next += 1;
  176. if (RE_HEX_ESCAPE.test(css.charAt(next))) {
  177. while (RE_HEX_ESCAPE.test(css.charAt(next + 1))) {
  178. next += 1;
  179. }
  180. if (css.charCodeAt(next + 1) === SPACE) {
  181. next += 1;
  182. }
  183. }
  184. }
  185. currentToken = ['word', css.slice(pos, next + 1), line, pos - offset, line, next - offset];
  186. pos = next;
  187. break;
  188. default:
  189. if (code === SLASH && css.charCodeAt(pos + 1) === ASTERISK) {
  190. next = css.indexOf('*/', pos + 2) + 1;
  191. if (next === 0) {
  192. if (ignore || ignoreUnclosed) {
  193. next = css.length;
  194. } else {
  195. unclosed('comment');
  196. }
  197. }
  198. content = css.slice(pos, next + 1);
  199. lines = content.split('\n');
  200. last = lines.length - 1;
  201. if (last > 0) {
  202. nextLine = line + last;
  203. nextOffset = next - lines[last].length;
  204. } else {
  205. nextLine = line;
  206. nextOffset = offset;
  207. }
  208. currentToken = ['comment', content, line, pos - offset, nextLine, next - nextOffset];
  209. offset = nextOffset;
  210. line = nextLine;
  211. pos = next;
  212. } else {
  213. RE_WORD_END.lastIndex = pos + 1;
  214. RE_WORD_END.test(css);
  215. if (RE_WORD_END.lastIndex === 0) {
  216. next = css.length - 1;
  217. } else {
  218. next = RE_WORD_END.lastIndex - 2;
  219. }
  220. currentToken = ['word', css.slice(pos, next + 1), line, pos - offset, line, next - offset];
  221. buffer.push(currentToken);
  222. pos = next;
  223. }
  224. break;
  225. }
  226. pos++;
  227. return currentToken;
  228. }
  229. function back(token) {
  230. returned.push(token);
  231. }
  232. return {
  233. back: back,
  234. nextToken: nextToken,
  235. endOfFile: endOfFile
  236. };
  237. }
  238. module.exports = exports.default;
  239. //# 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&&\n          n !== FEED && n !== CR\n        ) {\n          next = pos\n          do {\n            escaped = false\n            next = css.indexOf(')', next + 1)\n            if (next === -1) {\n              if (ignore || ignoreUnclosed) {\n                next = pos\n                break\n              } else {\n                unclosed('bracket')\n              }\n            }\n            escapePos = next\n            while (css.charCodeAt(escapePos - 1) === BACKSLASH) {\n              escapePos -= 1\n              escaped = !escaped\n            }\n          } while (escaped)\n\n          currentToken = ['brackets', css.slice(pos, next + 1),\n            line, pos - offset,\n            line, next - offset\n          ]\n\n          pos = next\n        } else {\n          next = css.indexOf(')', pos + 1)\n          content = css.slice(pos, next + 1)\n\n          if (next === -1 || RE_BAD_BRACKET.test(content)) {\n            currentToken = ['(', '(', line, pos - offset]\n          } else {\n            currentToken = ['brackets', content,\n              line, pos - offset,\n              line, next - offset\n            ]\n            pos = next\n          }\n        }\n\n        break\n\n      case SINGLE_QUOTE:\n      case DOUBLE_QUOTE:\n        quote = code === SINGLE_QUOTE ? '\\'' : '\"'\n        next = pos\n        do {\n          escaped = false\n          next = css.indexOf(quote, next + 1)\n          if (next === -1) {\n            if (ignore || ignoreUnclosed) {\n              next = pos + 1\n              break\n            } else {\n              unclosed('string')\n            }\n          }\n          escapePos = next\n          while (css.charCodeAt(escapePos - 1) === BACKSLASH) {\n            escapePos -= 1\n            escaped = !escaped\n          }\n        } while (escaped)\n\n        content = css.slice(pos, next + 1)\n        lines = content.split('\\n')\n        last = lines.length - 1\n\n        if (last > 0) {\n          nextLine = line + last\n          nextOffset = next - lines[last].length\n        } else {\n          nextLine = line\n          nextOffset = offset\n        }\n\n        currentToken = ['string', css.slice(pos, next + 1),\n          line, pos - offset,\n          nextLine, next - nextOffset\n        ]\n\n        offset = nextOffset\n        line = nextLine\n        pos = next\n        break\n\n      case AT:\n        RE_AT_END.lastIndex = pos + 1\n        RE_AT_END.test(css)\n        if (RE_AT_END.lastIndex === 0) {\n          next = css.length - 1\n        } else {\n          next = RE_AT_END.lastIndex - 2\n        }\n\n        currentToken = ['at-word', css.slice(pos, next + 1),\n          line, pos - offset,\n          line, next - offset\n        ]\n\n        pos = next\n        break\n\n      case BACKSLASH:\n        next = pos\n        escape = true\n        while (css.charCodeAt(next + 1) === BACKSLASH) {\n          next += 1\n          escape = !escape\n        }\n        code = css.charCodeAt(next + 1)\n        if (\n          escape &&\n          code !== SLASH &&\n          code !== SPACE &&\n          code !== NEWLINE &&\n          code !== TAB &&\n          code !== CR &&\n          code !== FEED\n        ) {\n          next += 1\n          if (RE_HEX_ESCAPE.test(css.charAt(next))) {\n            while (RE_HEX_ESCAPE.test(css.charAt(next + 1))) {\n              next += 1\n            }\n            if (css.charCodeAt(next + 1) === SPACE) {\n              next += 1\n            }\n          }\n        }\n\n        currentToken = ['word', css.slice(pos, next + 1),\n          line, pos - offset,\n          line, next - offset\n        ]\n\n        pos = next\n        break\n\n      default:\n        if (code === SLASH && css.charCodeAt(pos + 1) === ASTERISK) {\n          next = css.indexOf('*/', pos + 2) + 1\n          if (next === 0) {\n            if (ignore || ignoreUnclosed) {\n              next = css.length\n            } else {\n              unclosed('comment')\n            }\n          }\n\n          content = css.slice(pos, next + 1)\n          lines = content.split('\\n')\n          last = lines.length - 1\n\n          if (last > 0) {\n            nextLine = line + last\n            nextOffset = next - lines[last].length\n          } else {\n            nextLine = line\n            nextOffset = offset\n          }\n\n          currentToken = ['comment', content,\n            line, pos - offset,\n            nextLine, next - nextOffset\n          ]\n\n          offset = nextOffset\n          line = nextLine\n          pos = next\n        } else {\n          RE_WORD_END.lastIndex = pos + 1\n          RE_WORD_END.test(css)\n          if (RE_WORD_END.lastIndex === 0) {\n            next = css.length - 1\n          } else {\n            next = RE_WORD_END.lastIndex - 2\n          }\n\n          currentToken = ['word', css.slice(pos, next + 1),\n            line, pos - offset,\n            line, next - offset\n          ]\n\n          buffer.push(currentToken)\n\n          pos = next\n        }\n\n        break\n    }\n\n    pos++\n    return currentToken\n  }\n\n  function back (token) {\n    returned.push(token)\n  }\n\n  return {\n    back,\n    nextToken,\n    endOfFile\n  }\n}\n"],"file":"tokenize.js"}