aboutsummaryrefslogtreecommitdiff
path: root/node_modules/postcss/node_modules/source-map/lib/util.js
diff options
context:
space:
mode:
Diffstat (limited to 'node_modules/postcss/node_modules/source-map/lib/util.js')
-rw-r--r--node_modules/postcss/node_modules/source-map/lib/util.js488
1 files changed, 488 insertions, 0 deletions
diff --git a/node_modules/postcss/node_modules/source-map/lib/util.js b/node_modules/postcss/node_modules/source-map/lib/util.js
new file mode 100644
index 0000000..3ca92e5
--- /dev/null
+++ b/node_modules/postcss/node_modules/source-map/lib/util.js
@@ -0,0 +1,488 @@
+/* -*- Mode: js; js-indent-level: 2; -*- */
+/*
+ * Copyright 2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ */
+
+/**
+ * This is a helper function for getting values from parameter/options
+ * objects.
+ *
+ * @param args The object we are extracting values from
+ * @param name The name of the property we are getting.
+ * @param defaultValue An optional value to return if the property is missing
+ * from the object. If this is not specified and the property is missing, an
+ * error will be thrown.
+ */
+function getArg(aArgs, aName, aDefaultValue) {
+ if (aName in aArgs) {
+ return aArgs[aName];
+ } else if (arguments.length === 3) {
+ return aDefaultValue;
+ } else {
+ throw new Error('"' + aName + '" is a required argument.');
+ }
+}
+exports.getArg = getArg;
+
+var urlRegexp = /^(?:([\w+\-.]+):)?\/\/(?:(\w+:\w+)@)?([\w.-]*)(?::(\d+))?(.*)$/;
+var dataUrlRegexp = /^data:.+\,.+$/;
+
+function urlParse(aUrl) {
+ var match = aUrl.match(urlRegexp);
+ if (!match) {
+ return null;
+ }
+ return {
+ scheme: match[1],
+ auth: match[2],
+ host: match[3],
+ port: match[4],
+ path: match[5]
+ };
+}
+exports.urlParse = urlParse;
+
+function urlGenerate(aParsedUrl) {
+ var url = '';
+ if (aParsedUrl.scheme) {
+ url += aParsedUrl.scheme + ':';
+ }
+ url += '//';
+ if (aParsedUrl.auth) {
+ url += aParsedUrl.auth + '@';
+ }
+ if (aParsedUrl.host) {
+ url += aParsedUrl.host;
+ }
+ if (aParsedUrl.port) {
+ url += ":" + aParsedUrl.port
+ }
+ if (aParsedUrl.path) {
+ url += aParsedUrl.path;
+ }
+ return url;
+}
+exports.urlGenerate = urlGenerate;
+
+/**
+ * Normalizes a path, or the path portion of a URL:
+ *
+ * - Replaces consecutive slashes with one slash.
+ * - Removes unnecessary '.' parts.
+ * - Removes unnecessary '<dir>/..' parts.
+ *
+ * Based on code in the Node.js 'path' core module.
+ *
+ * @param aPath The path or url to normalize.
+ */
+function normalize(aPath) {
+ var path = aPath;
+ var url = urlParse(aPath);
+ if (url) {
+ if (!url.path) {
+ return aPath;
+ }
+ path = url.path;
+ }
+ var isAbsolute = exports.isAbsolute(path);
+
+ var parts = path.split(/\/+/);
+ for (var part, up = 0, i = parts.length - 1; i >= 0; i--) {
+ part = parts[i];
+ if (part === '.') {
+ parts.splice(i, 1);
+ } else if (part === '..') {
+ up++;
+ } else if (up > 0) {
+ if (part === '') {
+ // The first part is blank if the path is absolute. Trying to go
+ // above the root is a no-op. Therefore we can remove all '..' parts
+ // directly after the root.
+ parts.splice(i + 1, up);
+ up = 0;
+ } else {
+ parts.splice(i, 2);
+ up--;
+ }
+ }
+ }
+ path = parts.join('/');
+
+ if (path === '') {
+ path = isAbsolute ? '/' : '.';
+ }
+
+ if (url) {
+ url.path = path;
+ return urlGenerate(url);
+ }
+ return path;
+}
+exports.normalize = normalize;
+
+/**
+ * Joins two paths/URLs.
+ *
+ * @param aRoot The root path or URL.
+ * @param aPath The path or URL to be joined with the root.
+ *
+ * - If aPath is a URL or a data URI, aPath is returned, unless aPath is a
+ * scheme-relative URL: Then the scheme of aRoot, if any, is prepended
+ * first.
+ * - Otherwise aPath is a path. If aRoot is a URL, then its path portion
+ * is updated with the result and aRoot is returned. Otherwise the result
+ * is returned.
+ * - If aPath is absolute, the result is aPath.
+ * - Otherwise the two paths are joined with a slash.
+ * - Joining for example 'http://' and 'www.example.com' is also supported.
+ */
+function join(aRoot, aPath) {
+ if (aRoot === "") {
+ aRoot = ".";
+ }
+ if (aPath === "") {
+ aPath = ".";
+ }
+ var aPathUrl = urlParse(aPath);
+ var aRootUrl = urlParse(aRoot);
+ if (aRootUrl) {
+ aRoot = aRootUrl.path || '/';
+ }
+
+ // `join(foo, '//www.example.org')`
+ if (aPathUrl && !aPathUrl.scheme) {
+ if (aRootUrl) {
+ aPathUrl.scheme = aRootUrl.scheme;
+ }
+ return urlGenerate(aPathUrl);
+ }
+
+ if (aPathUrl || aPath.match(dataUrlRegexp)) {
+ return aPath;
+ }
+
+ // `join('http://', 'www.example.com')`
+ if (aRootUrl && !aRootUrl.host && !aRootUrl.path) {
+ aRootUrl.host = aPath;
+ return urlGenerate(aRootUrl);
+ }
+
+ var joined = aPath.charAt(0) === '/'
+ ? aPath
+ : normalize(aRoot.replace(/\/+$/, '') + '/' + aPath);
+
+ if (aRootUrl) {
+ aRootUrl.path = joined;
+ return urlGenerate(aRootUrl);
+ }
+ return joined;
+}
+exports.join = join;
+
+exports.isAbsolute = function (aPath) {
+ return aPath.charAt(0) === '/' || urlRegexp.test(aPath);
+};
+
+/**
+ * Make a path relative to a URL or another path.
+ *
+ * @param aRoot The root path or URL.
+ * @param aPath The path or URL to be made relative to aRoot.
+ */
+function relative(aRoot, aPath) {
+ if (aRoot === "") {
+ aRoot = ".";
+ }
+
+ aRoot = aRoot.replace(/\/$/, '');
+
+ // It is possible for the path to be above the root. In this case, simply
+ // checking whether the root is a prefix of the path won't work. Instead, we
+ // need to remove components from the root one by one, until either we find
+ // a prefix that fits, or we run out of components to remove.
+ var level = 0;
+ while (aPath.indexOf(aRoot + '/') !== 0) {
+ var index = aRoot.lastIndexOf("/");
+ if (index < 0) {
+ return aPath;
+ }
+
+ // If the only part of the root that is left is the scheme (i.e. http://,
+ // file:///, etc.), one or more slashes (/), or simply nothing at all, we
+ // have exhausted all components, so the path is not relative to the root.
+ aRoot = aRoot.slice(0, index);
+ if (aRoot.match(/^([^\/]+:\/)?\/*$/)) {
+ return aPath;
+ }
+
+ ++level;
+ }
+
+ // Make sure we add a "../" for each component we removed from the root.
+ return Array(level + 1).join("../") + aPath.substr(aRoot.length + 1);
+}
+exports.relative = relative;
+
+var supportsNullProto = (function () {
+ var obj = Object.create(null);
+ return !('__proto__' in obj);
+}());
+
+function identity (s) {
+ return s;
+}
+
+/**
+ * Because behavior goes wacky when you set `__proto__` on objects, we
+ * have to prefix all the strings in our set with an arbitrary character.
+ *
+ * See https://github.com/mozilla/source-map/pull/31 and
+ * https://github.com/mozilla/source-map/issues/30
+ *
+ * @param String aStr
+ */
+function toSetString(aStr) {
+ if (isProtoString(aStr)) {
+ return '$' + aStr;
+ }
+
+ return aStr;
+}
+exports.toSetString = supportsNullProto ? identity : toSetString;
+
+function fromSetString(aStr) {
+ if (isProtoString(aStr)) {
+ return aStr.slice(1);
+ }
+
+ return aStr;
+}
+exports.fromSetString = supportsNullProto ? identity : fromSetString;
+
+function isProtoString(s) {
+ if (!s) {
+ return false;
+ }
+
+ var length = s.length;
+
+ if (length < 9 /* "__proto__".length */) {
+ return false;
+ }
+
+ if (s.charCodeAt(length - 1) !== 95 /* '_' */ ||
+ s.charCodeAt(length - 2) !== 95 /* '_' */ ||
+ s.charCodeAt(length - 3) !== 111 /* 'o' */ ||
+ s.charCodeAt(length - 4) !== 116 /* 't' */ ||
+ s.charCodeAt(length - 5) !== 111 /* 'o' */ ||
+ s.charCodeAt(length - 6) !== 114 /* 'r' */ ||
+ s.charCodeAt(length - 7) !== 112 /* 'p' */ ||
+ s.charCodeAt(length - 8) !== 95 /* '_' */ ||
+ s.charCodeAt(length - 9) !== 95 /* '_' */) {
+ return false;
+ }
+
+ for (var i = length - 10; i >= 0; i--) {
+ if (s.charCodeAt(i) !== 36 /* '$' */) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+/**
+ * Comparator between two mappings where the original positions are compared.
+ *
+ * Optionally pass in `true` as `onlyCompareGenerated` to consider two
+ * mappings with the same original source/line/column, but different generated
+ * line and column the same. Useful when searching for a mapping with a
+ * stubbed out mapping.
+ */
+function compareByOriginalPositions(mappingA, mappingB, onlyCompareOriginal) {
+ var cmp = strcmp(mappingA.source, mappingB.source);
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ cmp = mappingA.originalLine - mappingB.originalLine;
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ cmp = mappingA.originalColumn - mappingB.originalColumn;
+ if (cmp !== 0 || onlyCompareOriginal) {
+ return cmp;
+ }
+
+ cmp = mappingA.generatedColumn - mappingB.generatedColumn;
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ cmp = mappingA.generatedLine - mappingB.generatedLine;
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ return strcmp(mappingA.name, mappingB.name);
+}
+exports.compareByOriginalPositions = compareByOriginalPositions;
+
+/**
+ * Comparator between two mappings with deflated source and name indices where
+ * the generated positions are compared.
+ *
+ * Optionally pass in `true` as `onlyCompareGenerated` to consider two
+ * mappings with the same generated line and column, but different
+ * source/name/original line and column the same. Useful when searching for a
+ * mapping with a stubbed out mapping.
+ */
+function compareByGeneratedPositionsDeflated(mappingA, mappingB, onlyCompareGenerated) {
+ var cmp = mappingA.generatedLine - mappingB.generatedLine;
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ cmp = mappingA.generatedColumn - mappingB.generatedColumn;
+ if (cmp !== 0 || onlyCompareGenerated) {
+ return cmp;
+ }
+
+ cmp = strcmp(mappingA.source, mappingB.source);
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ cmp = mappingA.originalLine - mappingB.originalLine;
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ cmp = mappingA.originalColumn - mappingB.originalColumn;
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ return strcmp(mappingA.name, mappingB.name);
+}
+exports.compareByGeneratedPositionsDeflated = compareByGeneratedPositionsDeflated;
+
+function strcmp(aStr1, aStr2) {
+ if (aStr1 === aStr2) {
+ return 0;
+ }
+
+ if (aStr1 === null) {
+ return 1; // aStr2 !== null
+ }
+
+ if (aStr2 === null) {
+ return -1; // aStr1 !== null
+ }
+
+ if (aStr1 > aStr2) {
+ return 1;
+ }
+
+ return -1;
+}
+
+/**
+ * Comparator between two mappings with inflated source and name strings where
+ * the generated positions are compared.
+ */
+function compareByGeneratedPositionsInflated(mappingA, mappingB) {
+ var cmp = mappingA.generatedLine - mappingB.generatedLine;
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ cmp = mappingA.generatedColumn - mappingB.generatedColumn;
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ cmp = strcmp(mappingA.source, mappingB.source);
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ cmp = mappingA.originalLine - mappingB.originalLine;
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ cmp = mappingA.originalColumn - mappingB.originalColumn;
+ if (cmp !== 0) {
+ return cmp;
+ }
+
+ return strcmp(mappingA.name, mappingB.name);
+}
+exports.compareByGeneratedPositionsInflated = compareByGeneratedPositionsInflated;
+
+/**
+ * Strip any JSON XSSI avoidance prefix from the string (as documented
+ * in the source maps specification), and then parse the string as
+ * JSON.
+ */
+function parseSourceMapInput(str) {
+ return JSON.parse(str.replace(/^\)]}'[^\n]*\n/, ''));
+}
+exports.parseSourceMapInput = parseSourceMapInput;
+
+/**
+ * Compute the URL of a source given the the source root, the source's
+ * URL, and the source map's URL.
+ */
+function computeSourceURL(sourceRoot, sourceURL, sourceMapURL) {
+ sourceURL = sourceURL || '';
+
+ if (sourceRoot) {
+ // This follows what Chrome does.
+ if (sourceRoot[sourceRoot.length - 1] !== '/' && sourceURL[0] !== '/') {
+ sourceRoot += '/';
+ }
+ // The spec says:
+ // Line 4: An optional source root, useful for relocating source
+ // files on a server or removing repeated values in the
+ // “sources” entry. This value is prepended to the individual
+ // entries in the “source” field.
+ sourceURL = sourceRoot + sourceURL;
+ }
+
+ // Historically, SourceMapConsumer did not take the sourceMapURL as
+ // a parameter. This mode is still somewhat supported, which is why
+ // this code block is conditional. However, it's preferable to pass
+ // the source map URL to SourceMapConsumer, so that this function
+ // can implement the source URL resolution algorithm as outlined in
+ // the spec. This block is basically the equivalent of:
+ // new URL(sourceURL, sourceMapURL).toString()
+ // ... except it avoids using URL, which wasn't available in the
+ // older releases of node still supported by this library.
+ //
+ // The spec says:
+ // If the sources are not absolute URLs after prepending of the
+ // “sourceRoot”, the sources are resolved relative to the
+ // SourceMap (like resolving script src in a html document).
+ if (sourceMapURL) {
+ var parsed = urlParse(sourceMapURL);
+ if (!parsed) {
+ throw new Error("sourceMapURL could not be parsed");
+ }
+ if (parsed.path) {
+ // Strip the last path component, but keep the "/".
+ var index = parsed.path.lastIndexOf('/');
+ if (index >= 0) {
+ parsed.path = parsed.path.substring(0, index + 1);
+ }
+ }
+ sourceURL = join(urlGenerate(parsed), sourceURL);
+ }
+
+ return normalize(sourceURL);
+}
+exports.computeSourceURL = computeSourceURL;
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-05 20:50:33 +0000