--- /dev/null
+/* -*- 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
+ */
+
+var SourceMapGenerator = require('./source-map-generator').SourceMapGenerator;
+var util = require('./util');
+
+// Matches a Windows-style `\r\n` newline or a `\n` newline used by all other
+// operating systems these days (capturing the result).
+var REGEX_NEWLINE = /(\r?\n)/;
+
+// Newline character code for charCodeAt() comparisons
+var NEWLINE_CODE = 10;
+
+// Private symbol for identifying `SourceNode`s when multiple versions of
+// the source-map library are loaded. This MUST NOT CHANGE across
+// versions!
+var isSourceNode = "$$$isSourceNode$$$";
+
+/**
+ * SourceNodes provide a way to abstract over interpolating/concatenating
+ * snippets of generated JavaScript source code while maintaining the line and
+ * column information associated with the original source code.
+ *
+ * @param aLine The original line number.
+ * @param aColumn The original column number.
+ * @param aSource The original source's filename.
+ * @param aChunks Optional. An array of strings which are snippets of
+ * generated JS, or other SourceNodes.
+ * @param aName The original identifier.
+ */
+function SourceNode(aLine, aColumn, aSource, aChunks, aName) {
+ this.children = [];
+ this.sourceContents = {};
+ this.line = aLine == null ? null : aLine;
+ this.column = aColumn == null ? null : aColumn;
+ this.source = aSource == null ? null : aSource;
+ this.name = aName == null ? null : aName;
+ this[isSourceNode] = true;
+ if (aChunks != null) this.add(aChunks);
+}
+
+/**
+ * Creates a SourceNode from generated code and a SourceMapConsumer.
+ *
+ * @param aGeneratedCode The generated code
+ * @param aSourceMapConsumer The SourceMap for the generated code
+ * @param aRelativePath Optional. The path that relative sources in the
+ * SourceMapConsumer should be relative to.
+ */
+SourceNode.fromStringWithSourceMap =
+ function SourceNode_fromStringWithSourceMap(aGeneratedCode, aSourceMapConsumer, aRelativePath) {
+ // The SourceNode we want to fill with the generated code
+ // and the SourceMap
+ var node = new SourceNode();
+
+ // All even indices of this array are one line of the generated code,
+ // while all odd indices are the newlines between two adjacent lines
+ // (since `REGEX_NEWLINE` captures its match).
+ // Processed fragments are accessed by calling `shiftNextLine`.
+ var remainingLines = aGeneratedCode.split(REGEX_NEWLINE);
+ var remainingLinesIndex = 0;
+ var shiftNextLine = function() {
+ var lineContents = getNextLine();
+ // The last line of a file might not have a newline.
+ var newLine = getNextLine() || "";
+ return lineContents + newLine;
+
+ function getNextLine() {
+ return remainingLinesIndex < remainingLines.length ?
+ remainingLines[remainingLinesIndex++] : undefined;
+ }
+ };
+
+ // We need to remember the position of "remainingLines"
+ var lastGeneratedLine = 1, lastGeneratedColumn = 0;
+
+ // The generate SourceNodes we need a code range.
+ // To extract it current and last mapping is used.
+ // Here we store the last mapping.
+ var lastMapping = null;
+
+ aSourceMapConsumer.eachMapping(function (mapping) {
+ if (lastMapping !== null) {
+ // We add the code from "lastMapping" to "mapping":
+ // First check if there is a new line in between.
+ if (lastGeneratedLine < mapping.generatedLine) {
+ // Associate first line with "lastMapping"
+ addMappingWithCode(lastMapping, shiftNextLine());
+ lastGeneratedLine++;
+ lastGeneratedColumn = 0;
+ // The remaining code is added without mapping
+ } else {
+ // There is no new line in between.
+ // Associate the code between "lastGeneratedColumn" and
+ // "mapping.generatedColumn" with "lastMapping"
+ var nextLine = remainingLines[remainingLinesIndex];
+ var code = nextLine.substr(0, mapping.generatedColumn -
+ lastGeneratedColumn);
+ remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn -
+ lastGeneratedColumn);
+ lastGeneratedColumn = mapping.generatedColumn;
+ addMappingWithCode(lastMapping, code);
+ // No more remaining code, continue
+ lastMapping = mapping;
+ return;
+ }
+ }
+ // We add the generated code until the first mapping
+ // to the SourceNode without any mapping.
+ // Each line is added as separate string.
+ while (lastGeneratedLine < mapping.generatedLine) {
+ node.add(shiftNextLine());
+ lastGeneratedLine++;
+ }
+ if (lastGeneratedColumn < mapping.generatedColumn) {
+ var nextLine = remainingLines[remainingLinesIndex];
+ node.add(nextLine.substr(0, mapping.generatedColumn));
+ remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn);
+ lastGeneratedColumn = mapping.generatedColumn;
+ }
+ lastMapping = mapping;
+ }, this);
+ // We have processed all mappings.
+ if (remainingLinesIndex < remainingLines.length) {
+ if (lastMapping) {
+ // Associate the remaining code in the current line with "lastMapping"
+ addMappingWithCode(lastMapping, shiftNextLine());
+ }
+ // and add the remaining lines without any mapping
+ node.add(remainingLines.splice(remainingLinesIndex).join(""));
+ }
+
+ // Copy sourcesContent into SourceNode
+ aSourceMapConsumer.sources.forEach(function (sourceFile) {
+ var content = aSourceMapConsumer.sourceContentFor(sourceFile);
+ if (content != null) {
+ if (aRelativePath != null) {
+ sourceFile = util.join(aRelativePath, sourceFile);
+ }
+ node.setSourceContent(sourceFile, content);
+ }
+ });
+
+ return node;
+
+ function addMappingWithCode(mapping, code) {
+ if (mapping === null || mapping.source === undefined) {
+ node.add(code);
+ } else {
+ var source = aRelativePath
+ ? util.join(aRelativePath, mapping.source)
+ : mapping.source;
+ node.add(new SourceNode(mapping.originalLine,
+ mapping.originalColumn,
+ source,
+ code,
+ mapping.name));
+ }
+ }
+ };
+
+/**
+ * Add a chunk of generated JS to this source node.
+ *
+ * @param aChunk A string snippet of generated JS code, another instance of
+ * SourceNode, or an array where each member is one of those things.
+ */
+SourceNode.prototype.add = function SourceNode_add(aChunk) {
+ if (Array.isArray(aChunk)) {
+ aChunk.forEach(function (chunk) {
+ this.add(chunk);
+ }, this);
+ }
+ else if (aChunk[isSourceNode] || typeof aChunk === "string") {
+ if (aChunk) {
+ this.children.push(aChunk);
+ }
+ }
+ else {
+ throw new TypeError(
+ "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
+ );
+ }
+ return this;
+};
+
+/**
+ * Add a chunk of generated JS to the beginning of this source node.
+ *
+ * @param aChunk A string snippet of generated JS code, another instance of
+ * SourceNode, or an array where each member is one of those things.
+ */
+SourceNode.prototype.prepend = function SourceNode_prepend(aChunk) {
+ if (Array.isArray(aChunk)) {
+ for (var i = aChunk.length-1; i >= 0; i--) {
+ this.prepend(aChunk[i]);
+ }
+ }
+ else if (aChunk[isSourceNode] || typeof aChunk === "string") {
+ this.children.unshift(aChunk);
+ }
+ else {
+ throw new TypeError(
+ "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
+ );
+ }
+ return this;
+};
+
+/**
+ * Walk over the tree of JS snippets in this node and its children. The
+ * walking function is called once for each snippet of JS and is passed that
+ * snippet and the its original associated source's line/column location.
+ *
+ * @param aFn The traversal function.
+ */
+SourceNode.prototype.walk = function SourceNode_walk(aFn) {
+ var chunk;
+ for (var i = 0, len = this.children.length; i < len; i++) {
+ chunk = this.children[i];
+ if (chunk[isSourceNode]) {
+ chunk.walk(aFn);
+ }
+ else {
+ if (chunk !== '') {
+ aFn(chunk, { source: this.source,
+ line: this.line,
+ column: this.column,
+ name: this.name });
+ }
+ }
+ }
+};
+
+/**
+ * Like `String.prototype.join` except for SourceNodes. Inserts `aStr` between
+ * each of `this.children`.
+ *
+ * @param aSep The separator.
+ */
+SourceNode.prototype.join = function SourceNode_join(aSep) {
+ var newChildren;
+ var i;
+ var len = this.children.length;
+ if (len > 0) {
+ newChildren = [];
+ for (i = 0; i < len-1; i++) {
+ newChildren.push(this.children[i]);
+ newChildren.push(aSep);
+ }
+ newChildren.push(this.children[i]);
+ this.children = newChildren;
+ }
+ return this;
+};
+
+/**
+ * Call String.prototype.replace on the very right-most source snippet. Useful
+ * for trimming whitespace from the end of a source node, etc.
+ *
+ * @param aPattern The pattern to replace.
+ * @param aReplacement The thing to replace the pattern with.
+ */
+SourceNode.prototype.replaceRight = function SourceNode_replaceRight(aPattern, aReplacement) {
+ var lastChild = this.children[this.children.length - 1];
+ if (lastChild[isSourceNode]) {
+ lastChild.replaceRight(aPattern, aReplacement);
+ }
+ else if (typeof lastChild === 'string') {
+ this.children[this.children.length - 1] = lastChild.replace(aPattern, aReplacement);
+ }
+ else {
+ this.children.push(''.replace(aPattern, aReplacement));
+ }
+ return this;
+};
+
+/**
+ * Set the source content for a source file. This will be added to the SourceMapGenerator
+ * in the sourcesContent field.
+ *
+ * @param aSourceFile The filename of the source file
+ * @param aSourceContent The content of the source file
+ */
+SourceNode.prototype.setSourceContent =
+ function SourceNode_setSourceContent(aSourceFile, aSourceContent) {
+ this.sourceContents[util.toSetString(aSourceFile)] = aSourceContent;
+ };
+
+/**
+ * Walk over the tree of SourceNodes. The walking function is called for each
+ * source file content and is passed the filename and source content.
+ *
+ * @param aFn The traversal function.
+ */
+SourceNode.prototype.walkSourceContents =
+ function SourceNode_walkSourceContents(aFn) {
+ for (var i = 0, len = this.children.length; i < len; i++) {
+ if (this.children[i][isSourceNode]) {
+ this.children[i].walkSourceContents(aFn);
+ }
+ }
+
+ var sources = Object.keys(this.sourceContents);
+ for (var i = 0, len = sources.length; i < len; i++) {
+ aFn(util.fromSetString(sources[i]), this.sourceContents[sources[i]]);
+ }
+ };
+
+/**
+ * Return the string representation of this source node. Walks over the tree
+ * and concatenates all the various snippets together to one string.
+ */
+SourceNode.prototype.toString = function SourceNode_toString() {
+ var str = "";
+ this.walk(function (chunk) {
+ str += chunk;
+ });
+ return str;
+};
+
+/**
+ * Returns the string representation of this source node along with a source
+ * map.
+ */
+SourceNode.prototype.toStringWithSourceMap = function SourceNode_toStringWithSourceMap(aArgs) {
+ var generated = {
+ code: "",
+ line: 1,
+ column: 0
+ };
+ var map = new SourceMapGenerator(aArgs);
+ var sourceMappingActive = false;
+ var lastOriginalSource = null;
+ var lastOriginalLine = null;
+ var lastOriginalColumn = null;
+ var lastOriginalName = null;
+ this.walk(function (chunk, original) {
+ generated.code += chunk;
+ if (original.source !== null
+ && original.line !== null
+ && original.column !== null) {
+ if(lastOriginalSource !== original.source
+ || lastOriginalLine !== original.line
+ || lastOriginalColumn !== original.column
+ || lastOriginalName !== original.name) {
+ map.addMapping({
+ source: original.source,
+ original: {
+ line: original.line,
+ column: original.column
+ },
+ generated: {
+ line: generated.line,
+ column: generated.column
+ },
+ name: original.name
+ });
+ }
+ lastOriginalSource = original.source;
+ lastOriginalLine = original.line;
+ lastOriginalColumn = original.column;
+ lastOriginalName = original.name;
+ sourceMappingActive = true;
+ } else if (sourceMappingActive) {
+ map.addMapping({
+ generated: {
+ line: generated.line,
+ column: generated.column
+ }
+ });
+ lastOriginalSource = null;
+ sourceMappingActive = false;
+ }
+ for (var idx = 0, length = chunk.length; idx < length; idx++) {
+ if (chunk.charCodeAt(idx) === NEWLINE_CODE) {
+ generated.line++;
+ generated.column = 0;
+ // Mappings end at eol
+ if (idx + 1 === length) {
+ lastOriginalSource = null;
+ sourceMappingActive = false;
+ } else if (sourceMappingActive) {
+ map.addMapping({
+ source: original.source,
+ original: {
+ line: original.line,
+ column: original.column
+ },
+ generated: {
+ line: generated.line,
+ column: generated.column
+ },
+ name: original.name
+ });
+ }
+ } else {
+ generated.column++;
+ }
+ }
+ });
+ this.walkSourceContents(function (sourceFile, sourceContent) {
+ map.setSourceContent(sourceFile, sourceContent);
+ });
+
+ return { code: generated.code, map: map };
+};
+
+exports.SourceNode = SourceNode;
projects / dotfiles / .git / blobdiff