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build/node_modules/source-list-map/lib/fromStringWithSourceMap.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+var base64VLQ = require("./base64-vlq");
+var SourceNode = require("./SourceNode");
+var CodeNode = require("./CodeNode");
+var SourceListMap = require("./SourceListMap");
+
+module.exports = function fromStringWithSourceMap(code, map) {
+	var sources = map.sources;
+	var sourcesContent = map.sourcesContent;
+	var mappings = map.mappings.split(";");
+	var lines = code.split("\n");
+	var nodes = [];
+	var currentNode = null;
+	var currentLine = 1;
+	var currentSourceIdx = 0;
+	var currentSourceNodeLine;
+	mappings.forEach(function(mapping, idx) {
+		var 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 };
+		var lineAdded = false;
+		while(mapping.rest)
+			lineAdded = processMapping(mapping, line, lineAdded) || lineAdded;
+		if(!lineAdded)
+			addCode(line);
+	});
+	if(mappings.length < lines.length) {
+		var 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);
+		var sourceIdx = mapping.value + currentSourceIdx;
+		currentSourceIdx = sourceIdx;
+
+		if(mapping.rest && mapping.rest[0] !== ",") {
+			base64VLQ.decode(mapping.rest, mapping);
+			var linePosition = mapping.value + currentLine;
+			currentLine = linePosition;
+		} else {
+			var linePosition = currentLine;
+		}
+
+		if(mapping.rest) {
+			var 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;
+		}
+	}
+	function addCode(generatedCode) {
+		if(currentNode && currentNode instanceof CodeNode) {
+			currentNode.addGeneratedCode(generatedCode);
+		} else if(currentNode && currentNode instanceof SourceNode && !generatedCode.trim()) {
+			currentNode.generatedCode += 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.generatedCode += generatedCode;
+			currentSourceNodeLine++;
+		} else {
+			currentNode = new SourceNode(generatedCode, source, originalSource, linePosition);
+			currentSourceNodeLine = linePosition + 1;
+			nodes.push(currentNode);
+		}
+	}
+};