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							- /*
 
- 	MIT License http://www.opensource.org/licenses/mit-license.php
 
- 	Author Tobias Koppers @sokra
 
- */
 
- "use strict";
 
- var Source = require("./Source");
 
- var SourceNode = require("source-map").SourceNode;
 
- class Replacement {
 
- 	constructor(start, end, content, insertIndex, name) {
 
- 		this.start = start;
 
- 		this.end = end;
 
- 		this.content = content;
 
- 		this.insertIndex = insertIndex;
 
- 		this.name = name;
 
- 	}
 
- }
 
- class ReplaceSource extends Source {
 
- 	constructor(source, name) {
 
- 		super();
 
- 		this._source = source;
 
- 		this._name = name;
 
- 		/** @type {Replacement[]} */
 
- 		this.replacements = [];
 
- 	}
 
- 	replace(start, end, newValue, name) {
 
- 		if(typeof newValue !== "string")
 
- 			throw new Error("insertion must be a string, but is a " + typeof newValue);
 
- 		this.replacements.push(new Replacement(start, end, newValue, this.replacements.length, name));
 
- 	}
 
- 	insert(pos, newValue, name) {
 
- 		if(typeof newValue !== "string")
 
- 			throw new Error("insertion must be a string, but is a " + typeof newValue + ": " + newValue);
 
- 		this.replacements.push(new Replacement(pos, pos - 1, newValue, this.replacements.length, name));
 
- 	}
 
- 	source(options) {
 
- 		return this._replaceString(this._source.source());
 
- 	}
 
- 	original() {
 
- 		return this._source;
 
- 	}
 
- 	_sortReplacements() {
 
- 		this.replacements.sort(function(a, b) {
 
- 			var diff = b.end - a.end;
 
- 			if(diff !== 0)
 
- 				return diff;
 
- 			diff = b.start - a.start;
 
- 			if(diff !== 0)
 
- 				return diff;
 
- 			return b.insertIndex - a.insertIndex;
 
- 		});
 
- 	}
 
- 	_replaceString(str) {
 
- 		if(typeof str !== "string")
 
- 			throw new Error("str must be a string, but is a " + typeof str + ": " + str);
 
- 		this._sortReplacements();
 
- 		var result = [str];
 
- 		this.replacements.forEach(function(repl) {
 
- 			var remSource = result.pop();
 
- 			var splitted1 = this._splitString(remSource, Math.floor(repl.end + 1));
 
- 			var splitted2 = this._splitString(splitted1[0], Math.floor(repl.start));
 
- 			result.push(splitted1[1], repl.content, splitted2[0]);
 
- 		}, this);
 
- 		// write out result array in reverse order
 
- 		let resultStr = "";
 
- 		for(let i = result.length - 1; i >= 0; --i) {
 
- 			resultStr += result[i];
 
- 		}
 
- 		return resultStr;
 
- 	}
 
- 	node(options) {
 
- 		var node = this._source.node(options);
 
- 		if(this.replacements.length === 0) {
 
- 			return node;
 
- 		}
 
- 		this._sortReplacements();
 
- 		var replace = new ReplacementEnumerator(this.replacements);
 
- 		var output = [];
 
- 		var position = 0;
 
- 		var sources = Object.create(null);
 
- 		var sourcesInLines = Object.create(null);
 
- 		// We build a new list of SourceNodes in "output"
 
- 		// from the original mapping data
 
- 		var result = new SourceNode();
 
- 		// We need to add source contents manually
 
- 		// because "walk" will not handle it
 
- 		node.walkSourceContents(function(sourceFile, sourceContent) {
 
- 			result.setSourceContent(sourceFile, sourceContent);
 
- 			sources["$" + sourceFile] = sourceContent;
 
- 		});
 
- 		var replaceInStringNode = this._replaceInStringNode.bind(this, output, replace, function getOriginalSource(mapping) {
 
- 			var key = "$" + mapping.source;
 
- 			var lines = sourcesInLines[key];
 
- 			if(!lines) {
 
- 				var source = sources[key];
 
- 				if(!source) return null;
 
- 				lines = source.split("\n").map(function(line) {
 
- 					return line + "\n";
 
- 				});
 
- 				sourcesInLines[key] = lines;
 
- 			}
 
- 			// line is 1-based
 
- 			if(mapping.line > lines.length) return null;
 
- 			var line = lines[mapping.line - 1];
 
- 			return line.substr(mapping.column);
 
- 		});
 
- 		node.walk(function(chunk, mapping) {
 
- 			position = replaceInStringNode(chunk, position, mapping);
 
- 		});
 
- 		// If any replacements occur after the end of the original file, then we append them
 
- 		// directly to the end of the output
 
- 		var remaining = replace.footer();
 
- 		if(remaining) {
 
- 			output.push(remaining);
 
- 		}
 
- 		result.add(output);
 
- 		return result;
 
- 	}
 
- 	listMap(options) {
 
- 		this._sortReplacements();
 
- 		var map = this._source.listMap(options);
 
- 		var currentIndex = 0;
 
- 		var replacements = this.replacements;
 
- 		var idxReplacement = replacements.length - 1;
 
- 		var removeChars = 0;
 
- 		map = map.mapGeneratedCode(function(str) {
 
- 			var newCurrentIndex = currentIndex + str.length;
 
- 			if(removeChars > str.length) {
 
- 				removeChars -= str.length;
 
- 				str = "";
 
- 			} else {
 
- 				if(removeChars > 0) {
 
- 					str = str.substr(removeChars);
 
- 					currentIndex += removeChars;
 
- 					removeChars = 0;
 
- 				}
 
- 				var finalStr = "";
 
- 				while(idxReplacement >= 0 && replacements[idxReplacement].start < newCurrentIndex) {
 
- 					var repl = replacements[idxReplacement];
 
- 					var start = Math.floor(repl.start);
 
- 					var end = Math.floor(repl.end + 1);
 
- 					var before = str.substr(0, Math.max(0, start - currentIndex));
 
- 					if(end <= newCurrentIndex) {
 
- 						var after = str.substr(Math.max(0, end - currentIndex));
 
- 						finalStr += before + repl.content;
 
- 						str = after;
 
- 						currentIndex = Math.max(currentIndex, end);
 
- 					} else {
 
- 						finalStr += before + repl.content;
 
- 						str = "";
 
- 						removeChars = end - newCurrentIndex;
 
- 					}
 
- 					idxReplacement--;
 
- 				}
 
- 				str = finalStr + str;
 
- 			}
 
- 			currentIndex = newCurrentIndex;
 
- 			return str;
 
- 		});
 
- 		var extraCode = "";
 
- 		while(idxReplacement >= 0) {
 
- 			extraCode += replacements[idxReplacement].content;
 
- 			idxReplacement--;
 
- 		}
 
- 		if(extraCode) {
 
- 			map.add(extraCode);
 
- 		}
 
- 		return map;
 
- 	}
 
- 	_splitString(str, position) {
 
- 		return position <= 0 ? ["", str] : [str.substr(0, position), str.substr(position)];
 
- 	}
 
- 	_replaceInStringNode(output, replace, getOriginalSource, node, position, mapping) {
 
- 		var original = undefined;
 
- 		do {
 
- 			var splitPosition = replace.position - position;
 
- 			// If multiple replaces occur in the same location then the splitPosition may be
 
- 			// before the current position for the subsequent splits. Ensure it is >= 0
 
- 			if(splitPosition < 0) {
 
- 				splitPosition = 0;
 
- 			}
 
- 			if(splitPosition >= node.length || replace.done) {
 
- 				if(replace.emit) {
 
- 					var nodeEnd = new SourceNode(
 
- 						mapping.line,
 
- 						mapping.column,
 
- 						mapping.source,
 
- 						node,
 
- 						mapping.name
 
- 					);
 
- 					output.push(nodeEnd);
 
- 				}
 
- 				return position + node.length;
 
- 			}
 
- 			var originalColumn = mapping.column;
 
- 			// Try to figure out if generated code matches original code of this segement
 
- 			// If this is the case we assume that it's allowed to move mapping.column
 
- 			// Because getOriginalSource can be expensive we only do it when neccessary
 
- 			var nodePart;
 
- 			if(splitPosition > 0) {
 
- 				nodePart = node.slice(0, splitPosition);
 
- 				if(original === undefined) {
 
- 					original = getOriginalSource(mapping);
 
- 				}
 
- 				if(original && original.length >= splitPosition && original.startsWith(nodePart)) {
 
- 					mapping.column += splitPosition;
 
- 					original = original.substr(splitPosition);
 
- 				}
 
- 			}
 
- 			var emit = replace.next();
 
- 			if(!emit) {
 
- 				// Stop emitting when we have found the beginning of the string to replace.
 
- 				// Emit the part of the string before splitPosition
 
- 				if(splitPosition > 0) {
 
- 					var nodeStart = new SourceNode(
 
- 						mapping.line,
 
- 						originalColumn,
 
- 						mapping.source,
 
- 						nodePart,
 
- 						mapping.name
 
- 					);
 
- 					output.push(nodeStart);
 
- 				}
 
- 				// Emit the replacement value
 
- 				if(replace.value) {
 
- 					output.push(new SourceNode(
 
- 						mapping.line,
 
- 						mapping.column,
 
- 						mapping.source,
 
- 						replace.value,
 
- 						mapping.name || replace.name
 
- 					));
 
- 				}
 
- 			}
 
- 			// Recurse with remainder of the string as there may be multiple replaces within a single node
 
- 			node = node.substr(splitPosition);
 
- 			position += splitPosition;
 
- 		} while (true);
 
- 	}
 
- }
 
- class ReplacementEnumerator {
 
- 	/**
 
- 	 * @param {Replacement[]} replacements list of replacements
 
- 	 */
 
- 	constructor(replacements) {
 
- 		this.replacements = replacements || [];
 
- 		this.index = this.replacements.length;
 
- 		this.done = false;
 
- 		this.emit = false;
 
- 		// Set initial start position
 
- 		this.next();
 
- 	}
 
- 	next() {
 
- 		if(this.done)
 
- 			return true;
 
- 		if(this.emit) {
 
- 			// Start point found. stop emitting. set position to find end
 
- 			var repl = this.replacements[this.index];
 
- 			var end = Math.floor(repl.end + 1);
 
- 			this.position = end;
 
- 			this.value = repl.content;
 
- 			this.name = repl.name;
 
- 		} else {
 
- 			// End point found. start emitting. set position to find next start
 
- 			this.index--;
 
- 			if(this.index < 0) {
 
- 				this.done = true;
 
- 			} else {
 
- 				var nextRepl = this.replacements[this.index];
 
- 				var start = Math.floor(nextRepl.start);
 
- 				this.position = start;
 
- 			}
 
- 		}
 
- 		if(this.position < 0)
 
- 			this.position = 0;
 
- 		this.emit = !this.emit;
 
- 		return this.emit;
 
- 	}
 
- 	footer() {
 
- 		if(!this.done && !this.emit)
 
- 			this.next(); // If we finished _replaceInNode mid emit we advance to next entry
 
- 		if(this.done) {
 
- 			return [];
 
- 		} else {
 
- 			var resultStr = "";
 
- 			for(var i = this.index; i >= 0; i--) {
 
- 				var repl = this.replacements[i];
 
- 				// this doesn't need to handle repl.name, because in SourceMaps generated code
 
- 				// without pointer to original source can't have a name
 
- 				resultStr += repl.content;
 
- 			}
 
- 			return resultStr;
 
- 		}
 
- 	}
 
- }
 
- require("./SourceAndMapMixin")(ReplaceSource.prototype);
 
- module.exports = ReplaceSource;
 
 
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