forked from zhurui/management
94 lines
2.9 KiB
JavaScript
94 lines
2.9 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const base64VLQ = require("./base64-vlq");
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const getNumberOfLines = require("./helpers").getNumberOfLines;
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const getUnfinishedLine = require("./helpers").getUnfinishedLine;
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const LINE_MAPPING = ";AAAA";
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class SingleLineNode {
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constructor(generatedCode, source, originalSource, line) {
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this.generatedCode = generatedCode;
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this.originalSource = originalSource;
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this.source = source;
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this.line = line || 1;
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this._numberOfLines = getNumberOfLines(this.generatedCode);
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this._endsWithNewLine = generatedCode[generatedCode.length - 1] === "\n";
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}
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clone() {
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return new SingleLineNode(this.generatedCode, this.source, this.originalSource, this.line);
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}
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getGeneratedCode() {
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return this.generatedCode;
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}
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getMappings(mappingsContext) {
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if(!this.generatedCode)
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return "";
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const lines = this._numberOfLines;
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const sourceIdx = mappingsContext.ensureSource(this.source, this.originalSource);
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let mappings = "A"; // generated column 0
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if(mappingsContext.unfinishedGeneratedLine)
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mappings = "," + base64VLQ.encode(mappingsContext.unfinishedGeneratedLine);
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mappings += base64VLQ.encode(sourceIdx - mappingsContext.currentSource); // source index
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mappings += base64VLQ.encode(this.line - mappingsContext.currentOriginalLine); // original line index
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mappings += "A"; // original column 0
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mappingsContext.currentSource = sourceIdx;
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mappingsContext.currentOriginalLine = this.line;
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const unfinishedGeneratedLine = mappingsContext.unfinishedGeneratedLine = getUnfinishedLine(this.generatedCode)
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mappings += Array(lines).join(LINE_MAPPING);
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if(unfinishedGeneratedLine === 0) {
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mappings += ";";
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} else {
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if(lines !== 0)
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mappings += LINE_MAPPING;
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}
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return mappings;
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}
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getNormalizedNodes() {
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return [this];
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}
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mapGeneratedCode(fn) {
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const generatedCode = fn(this.generatedCode);
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return new SingleLineNode(generatedCode, this.source, this.originalSource, this.line);
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}
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merge(otherNode) {
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if(otherNode instanceof SingleLineNode) {
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return this.mergeSingleLineNode(otherNode);
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}
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return false;
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}
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mergeSingleLineNode(otherNode) {
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if(this.source === otherNode.source &&
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this.originalSource === otherNode.originalSource) {
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if(this.line === otherNode.line) {
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this.generatedCode += otherNode.generatedCode;
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this._numberOfLines += otherNode._numberOfLines;
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this._endsWithNewLine = otherNode._endsWithNewLine;
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return this;
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} else if(this.line + 1 === otherNode.line &&
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this._endsWithNewLine &&
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this._numberOfLines === 1 &&
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otherNode._numberOfLines <= 1) {
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return new SourceNode(this.generatedCode + otherNode.generatedCode, this.source, this.originalSource, this.line);
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}
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}
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return false;
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}
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}
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module.exports = SingleLineNode;
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const SourceNode = require("./SourceNode"); // circular dependency
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