postcss-url-parser.js 4.7 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", {
  3. value: true
  4. });
  5. exports.default = void 0;
  6. var _postcss = _interopRequireDefault(require("postcss"));
  7. var _postcssValueParser = _interopRequireDefault(require("postcss-value-parser"));
  8. var _utils = require("../utils");
  9. function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
  10. const pluginName = 'postcss-url-parser';
  11. const isUrlFunc = /url/i;
  12. const isImageSetFunc = /^(?:-webkit-)?image-set$/i;
  13. const needParseDecl = /(?:url|(?:-webkit-)?image-set)\(/i;
  14. function getNodeFromUrlFunc(node) {
  15. return node.nodes && node.nodes[0];
  16. }
  17. function walkUrls(parsed, callback) {
  18. parsed.walk(node => {
  19. if (node.type !== 'function') {
  20. return;
  21. }
  22. if (isUrlFunc.test(node.value)) {
  23. const {
  24. nodes
  25. } = node;
  26. const isStringValue = nodes.length !== 0 && nodes[0].type === 'string';
  27. const url = isStringValue ? nodes[0].value : _postcssValueParser.default.stringify(nodes);
  28. callback(getNodeFromUrlFunc(node), url, false, isStringValue); // Do not traverse inside `url`
  29. // eslint-disable-next-line consistent-return
  30. return false;
  31. }
  32. if (isImageSetFunc.test(node.value)) {
  33. for (const nNode of node.nodes) {
  34. const {
  35. type,
  36. value
  37. } = nNode;
  38. if (type === 'function' && isUrlFunc.test(value)) {
  39. const {
  40. nodes
  41. } = nNode;
  42. const isStringValue = nodes.length !== 0 && nodes[0].type === 'string';
  43. const url = isStringValue ? nodes[0].value : _postcssValueParser.default.stringify(nodes);
  44. callback(getNodeFromUrlFunc(nNode), url, false, isStringValue);
  45. }
  46. if (type === 'string') {
  47. callback(nNode, value, true, true);
  48. }
  49. } // Do not traverse inside `image-set`
  50. // eslint-disable-next-line consistent-return
  51. return false;
  52. }
  53. });
  54. }
  55. var _default = _postcss.default.plugin(pluginName, options => (css, result) => {
  56. const importsMap = new Map();
  57. const replacementsMap = new Map();
  58. let hasHelper = false;
  59. css.walkDecls(decl => {
  60. if (!needParseDecl.test(decl.value)) {
  61. return;
  62. }
  63. const parsed = (0, _postcssValueParser.default)(decl.value);
  64. walkUrls(parsed, (node, url, needQuotes, isStringValue) => {
  65. // https://www.w3.org/TR/css-syntax-3/#typedef-url-token
  66. if (url.replace(/^[\s]+|[\s]+$/g, '').length === 0) {
  67. result.warn(`Unable to find uri in '${decl ? decl.toString() : decl.value}'`, {
  68. node: decl
  69. });
  70. return;
  71. }
  72. if (options.filter && !options.filter(url)) {
  73. return;
  74. }
  75. const splittedUrl = url.split(/(\?)?#/);
  76. const [urlWithoutHash, singleQuery, hashValue] = splittedUrl;
  77. const hash = singleQuery || hashValue ? `${singleQuery ? '?' : ''}${hashValue ? `#${hashValue}` : ''}` : '';
  78. const normalizedUrl = (0, _utils.normalizeUrl)(urlWithoutHash, isStringValue);
  79. const importKey = normalizedUrl;
  80. let importName = importsMap.get(importKey);
  81. if (!importName) {
  82. importName = `___CSS_LOADER_URL_IMPORT_${importsMap.size}___`;
  83. importsMap.set(importKey, importName);
  84. if (!hasHelper) {
  85. const urlToHelper = require.resolve('../runtime/getUrl.js');
  86. result.messages.push({
  87. pluginName,
  88. type: 'import',
  89. value: {
  90. importName: '___CSS_LOADER_GET_URL_IMPORT___',
  91. url: options.urlHandler ? options.urlHandler(urlToHelper) : urlToHelper
  92. }
  93. });
  94. hasHelper = true;
  95. }
  96. result.messages.push({
  97. pluginName,
  98. type: 'import',
  99. value: {
  100. importName,
  101. url: options.urlHandler ? options.urlHandler(normalizedUrl) : normalizedUrl
  102. }
  103. });
  104. }
  105. const replacementKey = JSON.stringify({
  106. importKey,
  107. hash,
  108. needQuotes
  109. });
  110. let replacementName = replacementsMap.get(replacementKey);
  111. if (!replacementName) {
  112. replacementName = `___CSS_LOADER_URL_REPLACEMENT_${replacementsMap.size}___`;
  113. replacementsMap.set(replacementKey, replacementName);
  114. result.messages.push({
  115. pluginName,
  116. type: 'url-replacement',
  117. value: {
  118. replacementName,
  119. importName,
  120. hash,
  121. needQuotes
  122. }
  123. });
  124. } // eslint-disable-next-line no-param-reassign
  125. node.type = 'word'; // eslint-disable-next-line no-param-reassign
  126. node.value = replacementName;
  127. }); // eslint-disable-next-line no-param-reassign
  128. decl.value = parsed.toString();
  129. });
  130. });
  131. exports.default = _default;