[6a3a178] | 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | Author Tobias Koppers @sokra
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| 4 | */
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| 5 | "use strict";
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| 6 |
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| 7 | const base64VLQ = require("./base64-vlq");
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| 8 | const getNumberOfLines = require("./helpers").getNumberOfLines;
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| 9 | const getUnfinishedLine = require("./helpers").getUnfinishedLine;
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| 10 |
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| 11 | const LINE_MAPPING = ";AACA";
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| 12 |
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| 13 | class SourceNode {
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| 14 |
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| 15 | constructor(generatedCode, source, originalSource, startingLine) {
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| 16 | this.generatedCode = generatedCode;
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| 17 | this.originalSource = originalSource;
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| 18 | this.source = source;
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| 19 | this.startingLine = startingLine || 1;
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| 20 | this._numberOfLines = getNumberOfLines(this.generatedCode);
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| 21 | this._endsWithNewLine = generatedCode[generatedCode.length - 1] === "\n";
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| 22 | }
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| 23 |
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| 24 | clone() {
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| 25 | return new SourceNode(this.generatedCode, this.source, this.originalSource, this.startingLine);
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| 26 | }
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| 27 |
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| 28 | getGeneratedCode() {
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| 29 | return this.generatedCode;
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| 30 | }
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| 31 |
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| 32 | addGeneratedCode(code) {
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| 33 | this.generatedCode += code;
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| 34 | this._numberOfLines += getNumberOfLines(code);
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| 35 | this._endsWithNewLine = code[code.length - 1] === "\n";
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| 36 | }
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| 37 |
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| 38 | getMappings(mappingsContext) {
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| 39 | if(!this.generatedCode)
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| 40 | return "";
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| 41 | const lines = this._numberOfLines;
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| 42 | const sourceIdx = mappingsContext.ensureSource(this.source, this.originalSource);
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| 43 | let mappings = "A"; // generated column 0
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| 44 | if(mappingsContext.unfinishedGeneratedLine)
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| 45 | mappings = "," + base64VLQ.encode(mappingsContext.unfinishedGeneratedLine);
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| 46 | mappings += base64VLQ.encode(sourceIdx - mappingsContext.currentSource); // source index
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| 47 | mappings += base64VLQ.encode(this.startingLine - mappingsContext.currentOriginalLine); // original line index
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| 48 | mappings += "A"; // original column 0
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| 49 | mappingsContext.currentSource = sourceIdx;
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| 50 | mappingsContext.currentOriginalLine = this.startingLine + lines - 1;
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| 51 | const unfinishedGeneratedLine = mappingsContext.unfinishedGeneratedLine = getUnfinishedLine(this.generatedCode)
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| 52 | mappings += Array(lines).join(LINE_MAPPING);
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| 53 | if(unfinishedGeneratedLine === 0) {
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| 54 | mappings += ";";
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| 55 | } else {
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| 56 | if(lines !== 0) {
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| 57 | mappings += LINE_MAPPING;
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| 58 | }
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| 59 | mappingsContext.currentOriginalLine++;
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| 60 | }
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| 61 | return mappings;
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| 62 | }
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| 63 |
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| 64 | mapGeneratedCode(fn) {
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| 65 | throw new Error("Cannot map generated code on a SourceMap. Normalize to SingleLineNode first.");
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| 66 | }
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| 67 |
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| 68 | getNormalizedNodes() {
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| 69 | var results = [];
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| 70 | var currentLine = this.startingLine;
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| 71 | var generatedCode = this.generatedCode;
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| 72 | var index = 0;
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| 73 | var indexEnd = generatedCode.length;
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| 74 | while(index < indexEnd) {
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| 75 | // get one generated line
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| 76 | var nextLine = generatedCode.indexOf("\n", index) + 1;
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| 77 | if(nextLine === 0) nextLine = indexEnd;
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| 78 | var lineGenerated = generatedCode.substr(index, nextLine - index);
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| 79 |
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| 80 | results.push(new SingleLineNode(lineGenerated, this.source, this.originalSource, currentLine));
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| 81 |
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| 82 | // move cursors
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| 83 | index = nextLine;
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| 84 | currentLine++;
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| 85 | }
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| 86 | return results;
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| 87 | }
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| 88 |
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| 89 | merge(otherNode) {
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| 90 | if(otherNode instanceof SourceNode) {
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| 91 | return this.mergeSourceNode(otherNode);
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| 92 | } else if(otherNode instanceof SingleLineNode) {
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| 93 | return this.mergeSingleLineNode(otherNode);
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| 94 | }
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| 95 | return false;
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| 96 | }
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| 97 |
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| 98 | mergeSourceNode(otherNode) {
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| 99 | if(this.source === otherNode.source &&
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| 100 | this._endsWithNewLine &&
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| 101 | this.startingLine + this._numberOfLines === otherNode.startingLine) {
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| 102 | this.generatedCode += otherNode.generatedCode;
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| 103 | this._numberOfLines += otherNode._numberOfLines;
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| 104 | this._endsWithNewLine = otherNode._endsWithNewLine;
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| 105 | return this;
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| 106 | }
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| 107 | return false;
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| 108 | }
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| 109 |
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| 110 | mergeSingleLineNode(otherNode) {
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| 111 | if(this.source === otherNode.source &&
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| 112 | this._endsWithNewLine &&
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| 113 | this.startingLine + this._numberOfLines === otherNode.line &&
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| 114 | otherNode._numberOfLines <= 1) {
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| 115 | this.addSingleLineNode(otherNode);
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| 116 | return this;
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| 117 | }
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| 118 | return false;
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| 119 | }
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| 120 |
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| 121 | addSingleLineNode(otherNode) {
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| 122 | this.generatedCode += otherNode.generatedCode;
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| 123 | this._numberOfLines += otherNode._numberOfLines
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| 124 | this._endsWithNewLine = otherNode._endsWithNewLine;
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| 125 | }
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| 126 | }
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| 127 |
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| 128 | module.exports = SourceNode;
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| 129 | const SingleLineNode = require("./SingleLineNode"); // circular dependency
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