aaac7fed
 liuqimichale
add
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const base64VLQ = require("./base64-vlq");
const getNumberOfLines = require("./helpers").getNumberOfLines;
const getUnfinishedLine = require("./helpers").getUnfinishedLine;
const LINE_MAPPING = ";AAAA";
class SingleLineNode {
constructor(generatedCode, source, originalSource, line) {
this.generatedCode = generatedCode;
this.originalSource = originalSource;
this.source = source;
this.line = line || 1;
this._numberOfLines = getNumberOfLines(this.generatedCode);
this._endsWithNewLine = generatedCode[generatedCode.length - 1] === "\n";
}
clone() {
return new SingleLineNode(this.generatedCode, this.source, this.originalSource, this.line);
}
getGeneratedCode() {
return this.generatedCode;
}
getMappings(mappingsContext) {
if(!this.generatedCode)
return "";
const lines = this._numberOfLines;
const sourceIdx = mappingsContext.ensureSource(this.source, this.originalSource);
let mappings = "A"; // generated column 0
if(mappingsContext.unfinishedGeneratedLine)
mappings = "," + base64VLQ.encode(mappingsContext.unfinishedGeneratedLine);
mappings += base64VLQ.encode(sourceIdx - mappingsContext.currentSource); // source index
mappings += base64VLQ.encode(this.line - mappingsContext.currentOriginalLine); // original line index
mappings += "A"; // original column 0
mappingsContext.currentSource = sourceIdx;
mappingsContext.currentOriginalLine = this.line;
const unfinishedGeneratedLine = mappingsContext.unfinishedGeneratedLine = getUnfinishedLine(this.generatedCode)
mappings += Array(lines).join(LINE_MAPPING);
if(unfinishedGeneratedLine === 0) {
mappings += ";";
} else {
if(lines !== 0)
mappings += LINE_MAPPING;
}
return mappings;
}
getNormalizedNodes() {
return [this];
}
mapGeneratedCode(fn) {
const generatedCode = fn(this.generatedCode);
return new SingleLineNode(generatedCode, this.source, this.originalSource, this.line);
}
merge(otherNode) {
if(otherNode instanceof SingleLineNode) {
return this.mergeSingleLineNode(otherNode);
}
return false;
}
mergeSingleLineNode(otherNode) {
if(this.source === otherNode.source &&
this.originalSource === otherNode.originalSource) {
if(this.line === otherNode.line) {
this.generatedCode += otherNode.generatedCode;
this._numberOfLines += otherNode._numberOfLines;
this._endsWithNewLine = otherNode._endsWithNewLine;
return this;
} else if(this.line + 1 === otherNode.line &&
this._endsWithNewLine &&
this._numberOfLines === 1 &&
otherNode._numberOfLines <= 1) {
return new SourceNode(this.generatedCode + otherNode.generatedCode, this.source, this.originalSource, this.line);
}
}
return false;
}
}
module.exports = SingleLineNode;
const SourceNode = require("./SourceNode"); // circular dependency
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