修改禁引可视域

‘liusuyi’

2023-10-30 3c450768402293d86350e8420f365210c83233fa

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