forked from zhurui/management
103 lines
3.0 KiB
JavaScript
103 lines
3.0 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 SourceNode = require("./SourceNode");
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const CodeNode = require("./CodeNode");
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const SourceListMap = require("./SourceListMap");
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module.exports = function fromStringWithSourceMap(code, map) {
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const sources = map.sources;
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const sourcesContent = map.sourcesContent;
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const mappings = map.mappings.split(";");
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const lines = code.split("\n");
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const nodes = [];
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let currentNode = null;
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let currentLine = 1;
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let currentSourceIdx = 0;
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let currentSourceNodeLine;
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function addCode(generatedCode) {
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if(currentNode && currentNode instanceof CodeNode) {
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currentNode.addGeneratedCode(generatedCode);
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} else if(currentNode && currentNode instanceof SourceNode && !generatedCode.trim()) {
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currentNode.addGeneratedCode(generatedCode);
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currentSourceNodeLine++;
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} else {
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currentNode = new CodeNode(generatedCode);
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nodes.push(currentNode);
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}
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}
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function addSource(generatedCode, source, originalSource, linePosition) {
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if(currentNode && currentNode instanceof SourceNode &&
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currentNode.source === source &&
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currentSourceNodeLine === linePosition
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) {
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currentNode.addGeneratedCode(generatedCode);
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currentSourceNodeLine++;
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} else {
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currentNode = new SourceNode(generatedCode, source, originalSource, linePosition);
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currentSourceNodeLine = linePosition + 1;
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nodes.push(currentNode);
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}
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}
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mappings.forEach(function(mapping, idx) {
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let line = lines[idx];
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if(typeof line === 'undefined') return;
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if(idx !== lines.length - 1) line += "\n";
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if(!mapping)
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return addCode(line);
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mapping = { value: 0, rest: mapping };
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let lineAdded = false;
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while(mapping.rest)
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lineAdded = processMapping(mapping, line, lineAdded) || lineAdded;
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if(!lineAdded)
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addCode(line);
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});
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if(mappings.length < lines.length) {
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let idx = mappings.length;
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while(!lines[idx].trim() && idx < lines.length-1) {
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addCode(lines[idx] + "\n");
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idx++;
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}
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addCode(lines.slice(idx).join("\n"));
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}
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return new SourceListMap(nodes);
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function processMapping(mapping, line, ignore) {
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if(mapping.rest && mapping.rest[0] !== ",") {
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base64VLQ.decode(mapping.rest, mapping);
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}
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if(!mapping.rest)
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return false;
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if(mapping.rest[0] === ",") {
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mapping.rest = mapping.rest.substr(1);
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return false;
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}
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base64VLQ.decode(mapping.rest, mapping);
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const sourceIdx = mapping.value + currentSourceIdx;
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currentSourceIdx = sourceIdx;
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let linePosition;
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if(mapping.rest && mapping.rest[0] !== ",") {
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base64VLQ.decode(mapping.rest, mapping);
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linePosition = mapping.value + currentLine;
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currentLine = linePosition;
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} else {
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linePosition = currentLine;
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}
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if(mapping.rest) {
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const next = mapping.rest.indexOf(",");
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mapping.rest = next === -1 ? "" : mapping.rest.substr(next);
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}
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if(!ignore) {
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addSource(line, sources ? sources[sourceIdx] : null, sourcesContent ? sourcesContent[sourceIdx] : null, linePosition)
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return true;
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}
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}
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};
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