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(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.MagicString = factory());
})(this, (function () { 'use strict';

	var BitSet = function BitSet(arg) {
		this.bits = arg instanceof BitSet ? arg.bits.slice() : [];
	};

	BitSet.prototype.add = function add (n) {
		this.bits[n >> 5] |= 1 << (n & 31);
	};

	BitSet.prototype.has = function has (n) {
		return !!(this.bits[n >> 5] & (1 << (n & 31)));
	};

	var Chunk = function Chunk(start, end, content) {
		this.start = start;
		this.end = end;
		this.original = content;

		this.intro = '';
		this.outro = '';

		this.content = content;
		this.storeName = false;
		this.edited = false;

		// we make these non-enumerable, for sanity while debugging
		Object.defineProperties(this, {
			previous: { writable: true, value: null },
			next: { writable: true, value: null },
		});
	};

	Chunk.prototype.appendLeft = function appendLeft (content) {
		this.outro += content;
	};

	Chunk.prototype.appendRight = function appendRight (content) {
		this.intro = this.intro + content;
	};

	Chunk.prototype.clone = function clone () {
		var chunk = new Chunk(this.start, this.end, this.original);

		chunk.intro = this.intro;
		chunk.outro = this.outro;
		chunk.content = this.content;
		chunk.storeName = this.storeName;
		chunk.edited = this.edited;

		return chunk;
	};

	Chunk.prototype.contains = function contains (index) {
		return this.start < index && index < this.end;
	};

	Chunk.prototype.eachNext = function eachNext (fn) {
		var chunk = this;
		while (chunk) {
			fn(chunk);
			chunk = chunk.next;
		}
	};

	Chunk.prototype.eachPrevious = function eachPrevious (fn) {
		var chunk = this;
		while (chunk) {
			fn(chunk);
			chunk = chunk.previous;
		}
	};

	Chunk.prototype.edit = function edit (content, storeName, contentOnly) {
		this.content = content;
		if (!contentOnly) {
			this.intro = '';
			this.outro = '';
		}
		this.storeName = storeName;

		this.edited = true;

		return this;
	};

	Chunk.prototype.prependLeft = function prependLeft (content) {
		this.outro = content + this.outro;
	};

	Chunk.prototype.prependRight = function prependRight (content) {
		this.intro = content + this.intro;
	};

	Chunk.prototype.split = function split (index) {
		var sliceIndex = index - this.start;

		var originalBefore = this.original.slice(0, sliceIndex);
		var originalAfter = this.original.slice(sliceIndex);

		this.original = originalBefore;

		var newChunk = new Chunk(index, this.end, originalAfter);
		newChunk.outro = this.outro;
		this.outro = '';

		this.end = index;

		if (this.edited) {
			// TODO is this block necessary?...
			newChunk.edit('', false);
			this.content = '';
		} else {
			this.content = originalBefore;
		}

		newChunk.next = this.next;
		if (newChunk.next) { newChunk.next.previous = newChunk; }
		newChunk.previous = this;
		this.next = newChunk;

		return newChunk;
	};

	Chunk.prototype.toString = function toString () {
		return this.intro + this.content + this.outro;
	};

	Chunk.prototype.trimEnd = function trimEnd (rx) {
		this.outro = this.outro.replace(rx, '');
		if (this.outro.length) { return true; }

		var trimmed = this.content.replace(rx, '');

		if (trimmed.length) {
			if (trimmed !== this.content) {
				this.split(this.start + trimmed.length).edit('', undefined, true);
			}
			return true;
		} else {
			this.edit('', undefined, true);

			this.intro = this.intro.replace(rx, '');
			if (this.intro.length) { return true; }
		}
	};

	Chunk.prototype.trimStart = function trimStart (rx) {
		this.intro = this.intro.replace(rx, '');
		if (this.intro.length) { return true; }

		var trimmed = this.content.replace(rx, '');

		if (trimmed.length) {
			if (trimmed !== this.content) {
				this.split(this.end - trimmed.length);
				this.edit('', undefined, true);
			}
			return true;
		} else {
			this.edit('', undefined, true);

			this.outro = this.outro.replace(rx, '');
			if (this.outro.length) { return true; }
		}
	};

	var charToInteger = {};
	var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
	for (var i = 0; i < chars.length; i++) {
	    charToInteger[chars.charCodeAt(i)] = i;
	}
	function encode(decoded) {
	    var sourceFileIndex = 0; // second field
	    var sourceCodeLine = 0; // third field
	    var sourceCodeColumn = 0; // fourth field
	    var nameIndex = 0; // fifth field
	    var mappings = '';
	    for (var i = 0; i < decoded.length; i++) {
	        var line = decoded[i];
	        if (i > 0)
	            mappings += ';';
	        if (line.length === 0)
	            continue;
	        var generatedCodeColumn = 0; // first field
	        var lineMappings = [];
	        for (var _i = 0, line_1 = line; _i < line_1.length; _i++) {
	            var segment = line_1[_i];
	            var segmentMappings = encodeInteger(segment[0] - generatedCodeColumn);
	            generatedCodeColumn = segment[0];
	            if (segment.length > 1) {
	                segmentMappings +=
	                    encodeInteger(segment[1] - sourceFileIndex) +
	                        encodeInteger(segment[2] - sourceCodeLine) +
	                        encodeInteger(segment[3] - sourceCodeColumn);
	                sourceFileIndex = segment[1];
	                sourceCodeLine = segment[2];
	                sourceCodeColumn = segment[3];
	            }
	            if (segment.length === 5) {
	                segmentMappings += encodeInteger(segment[4] - nameIndex);
	                nameIndex = segment[4];
	            }
	            lineMappings.push(segmentMappings);
	        }
	        mappings += lineMappings.join(',');
	    }
	    return mappings;
	}
	function encodeInteger(num) {
	    var result = '';
	    num = num < 0 ? (-num << 1) | 1 : num << 1;
	    do {
	        var clamped = num & 31;
	        num >>>= 5;
	        if (num > 0) {
	            clamped |= 32;
	        }
	        result += chars[clamped];
	    } while (num > 0);
	    return result;
	}

	var btoa = function () {
		throw new Error('Unsupported environment: `window.btoa` or `Buffer` should be supported.');
	};
	if (typeof window !== 'undefined' && typeof window.btoa === 'function') {
		btoa = function (str) { return window.btoa(unescape(encodeURIComponent(str))); };
	} else if (typeof Buffer === 'function') {
		btoa = function (str) { return Buffer.from(str, 'utf-8').toString('base64'); };
	}

	var SourceMap = function SourceMap(properties) {
		this.version = 3;
		this.file = properties.file;
		this.sources = properties.sources;
		this.sourcesContent = properties.sourcesContent;
		this.names = properties.names;
		this.mappings = encode(properties.mappings);
	};

	SourceMap.prototype.toString = function toString () {
		return JSON.stringify(this);
	};

	SourceMap.prototype.toUrl = function toUrl () {
		return 'data:application/json;charset=utf-8;base64,' + btoa(this.toString());
	};

	function guessIndent(code) {
		var lines = code.split('\n');

		var tabbed = lines.filter(function (line) { return /^\t+/.test(line); });
		var spaced = lines.filter(function (line) { return /^ {2,}/.test(line); });

		if (tabbed.length === 0 && spaced.length === 0) {
			return null;
		}

		// More lines tabbed than spaced? Assume tabs, and
		// default to tabs in the case of a tie (or nothing
		// to go on)
		if (tabbed.length >= spaced.length) {
			return '\t';
		}

		// Otherwise, we need to guess the multiple
		var min = spaced.reduce(function (previous, current) {
			var numSpaces = /^ +/.exec(current)[0].length;
			return Math.min(numSpaces, previous);
		}, Infinity);

		return new Array(min + 1).join(' ');
	}

	function getRelativePath(from, to) {
		var fromParts = from.split(/[/\\]/);
		var toParts = to.split(/[/\\]/);

		fromParts.pop(); // get dirname

		while (fromParts[0] === toParts[0]) {
			fromParts.shift();
			toParts.shift();
		}

		if (fromParts.length) {
			var i = fromParts.length;
			while (i--) { fromParts[i] = '..'; }
		}

		return fromParts.concat(toParts).join('/');
	}

	var toString = Object.prototype.toString;

	function isObject(thing) {
		return toString.call(thing) === '[object Object]';
	}

	function getLocator(source) {
		var originalLines = source.split('\n');
		var lineOffsets = [];

		for (var i = 0, pos = 0; i < originalLines.length; i++) {
			lineOffsets.push(pos);
			pos += originalLines[i].length + 1;
		}

		return function locate(index) {
			var i = 0;
			var j = lineOffsets.length;
			while (i < j) {
				var m = (i + j) >> 1;
				if (index < lineOffsets[m]) {
					j = m;
				} else {
					i = m + 1;
				}
			}
			var line = i - 1;
			var column = index - lineOffsets[line];
			return { line: line, column: column };
		};
	}

	var Mappings = function Mappings(hires) {
		this.hires = hires;
		this.generatedCodeLine = 0;
		this.generatedCodeColumn = 0;
		this.raw = [];
		this.rawSegments = this.raw[this.generatedCodeLine] = [];
		this.pending = null;
	};

	Mappings.prototype.addEdit = function addEdit (sourceIndex, content, loc, nameIndex) {
		if (content.length) {
			var segment = [this.generatedCodeColumn, sourceIndex, loc.line, loc.column];
			if (nameIndex >= 0) {
				segment.push(nameIndex);
			}
			this.rawSegments.push(segment);
		} else if (this.pending) {
			this.rawSegments.push(this.pending);
		}

		this.advance(content);
		this.pending = null;
	};

	Mappings.prototype.addUneditedChunk = function addUneditedChunk (sourceIndex, chunk, original, loc, sourcemapLocations) {
		var originalCharIndex = chunk.start;
		var first = true;

		while (originalCharIndex < chunk.end) {
			if (this.hires || first || sourcemapLocations.has(originalCharIndex)) {
				this.rawSegments.push([this.generatedCodeColumn, sourceIndex, loc.line, loc.column]);
			}

			if (original[originalCharIndex] === '\n') {
				loc.line += 1;
				loc.column = 0;
				this.generatedCodeLine += 1;
				this.raw[this.generatedCodeLine] = this.rawSegments = [];
				this.generatedCodeColumn = 0;
				first = true;
			} else {
				loc.column += 1;
				this.generatedCodeColumn += 1;
				first = false;
			}

			originalCharIndex += 1;
		}

		this.pending = null;
	};

	Mappings.prototype.advance = function advance (str) {
		if (!str) { return; }

		var lines = str.split('\n');

		if (lines.length > 1) {
			for (var i = 0; i < lines.length - 1; i++) {
				this.generatedCodeLine++;
				this.raw[this.generatedCodeLine] = this.rawSegments = [];
			}
			this.generatedCodeColumn = 0;
		}

		this.generatedCodeColumn += lines[lines.length - 1].length;
	};

	var n = '\n';

	var warned = {
		insertLeft: false,
		insertRight: false,
		storeName: false,
	};

	var MagicString = function MagicString(string, options) {
		if ( options === void 0 ) options = {};

		var chunk = new Chunk(0, string.length, string);

		Object.defineProperties(this, {
			original: { writable: true, value: string },
			outro: { writable: true, value: '' },
			intro: { writable: true, value: '' },
			firstChunk: { writable: true, value: chunk },
			lastChunk: { writable: true, value: chunk },
			lastSearchedChunk: { writable: true, value: chunk },
			byStart: { writable: true, value: {} },
			byEnd: { writable: true, value: {} },
			filename: { writable: true, value: options.filename },
			indentExclusionRanges: { writable: true, value: options.indentExclusionRanges },
			sourcemapLocations: { writable: true, value: new BitSet() },
			storedNames: { writable: true, value: {} },
			indentStr: { writable: true, value: guessIndent(string) },
		});

		this.byStart[0] = chunk;
		this.byEnd[string.length] = chunk;
	};

	MagicString.prototype.addSourcemapLocation = function addSourcemapLocation (char) {
		this.sourcemapLocations.add(char);
	};

	MagicString.prototype.append = function append (content) {
		if (typeof content !== 'string') { throw new TypeError('outro content must be a string'); }

		this.outro += content;
		return this;
	};

	MagicString.prototype.appendLeft = function appendLeft (index, content) {
		if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

		this._split(index);

		var chunk = this.byEnd[index];

		if (chunk) {
			chunk.appendLeft(content);
		} else {
			this.intro += content;
		}
		return this;
	};

	MagicString.prototype.appendRight = function appendRight (index, content) {
		if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

		this._split(index);

		var chunk = this.byStart[index];

		if (chunk) {
			chunk.appendRight(content);
		} else {
			this.outro += content;
		}
		return this;
	};

	MagicString.prototype.clone = function clone () {
		var cloned = new MagicString(this.original, { filename: this.filename });

		var originalChunk = this.firstChunk;
		var clonedChunk = (cloned.firstChunk = cloned.lastSearchedChunk = originalChunk.clone());

		while (originalChunk) {
			cloned.byStart[clonedChunk.start] = clonedChunk;
			cloned.byEnd[clonedChunk.end] = clonedChunk;

			var nextOriginalChunk = originalChunk.next;
			var nextClonedChunk = nextOriginalChunk && nextOriginalChunk.clone();

			if (nextClonedChunk) {
				clonedChunk.next = nextClonedChunk;
				nextClonedChunk.previous = clonedChunk;

				clonedChunk = nextClonedChunk;
			}

			originalChunk = nextOriginalChunk;
		}

		cloned.lastChunk = clonedChunk;

		if (this.indentExclusionRanges) {
			cloned.indentExclusionRanges = this.indentExclusionRanges.slice();
		}

		cloned.sourcemapLocations = new BitSet(this.sourcemapLocations);

		cloned.intro = this.intro;
		cloned.outro = this.outro;

		return cloned;
	};

	MagicString.prototype.generateDecodedMap = function generateDecodedMap (options) {
			var this$1$1 = this;

		options = options || {};

		var sourceIndex = 0;
		var names = Object.keys(this.storedNames);
		var mappings = new Mappings(options.hires);

		var locate = getLocator(this.original);

		if (this.intro) {
			mappings.advance(this.intro);
		}

		this.firstChunk.eachNext(function (chunk) {
			var loc = locate(chunk.start);

			if (chunk.intro.length) { mappings.advance(chunk.intro); }

			if (chunk.edited) {
				mappings.addEdit(
					sourceIndex,
					chunk.content,
					loc,
					chunk.storeName ? names.indexOf(chunk.original) : -1
				);
			} else {
				mappings.addUneditedChunk(sourceIndex, chunk, this$1$1.original, loc, this$1$1.sourcemapLocations);
			}

			if (chunk.outro.length) { mappings.advance(chunk.outro); }
		});

		return {
			file: options.file ? options.file.split(/[/\\]/).pop() : null,
			sources: [options.source ? getRelativePath(options.file || '', options.source) : null],
			sourcesContent: options.includeContent ? [this.original] : [null],
			names: names,
			mappings: mappings.raw,
		};
	};

	MagicString.prototype.generateMap = function generateMap (options) {
		return new SourceMap(this.generateDecodedMap(options));
	};

	MagicString.prototype.getIndentString = function getIndentString () {
		return this.indentStr === null ? '\t' : this.indentStr;
	};

	MagicString.prototype.indent = function indent (indentStr, options) {
		var pattern = /^[^\r\n]/gm;

		if (isObject(indentStr)) {
			options = indentStr;
			indentStr = undefined;
		}

		indentStr = indentStr !== undefined ? indentStr : this.indentStr || '\t';

		if (indentStr === '') { return this; } // noop

		options = options || {};

		// Process exclusion ranges
		var isExcluded = {};

		if (options.exclude) {
			var exclusions =
				typeof options.exclude[0] === 'number' ? [options.exclude] : options.exclude;
			exclusions.forEach(function (exclusion) {
				for (var i = exclusion[0]; i < exclusion[1]; i += 1) {
					isExcluded[i] = true;
				}
			});
		}

		var shouldIndentNextCharacter = options.indentStart !== false;
		var replacer = function (match) {
			if (shouldIndentNextCharacter) { return ("" + indentStr + match); }
			shouldIndentNextCharacter = true;
			return match;
		};

		this.intro = this.intro.replace(pattern, replacer);

		var charIndex = 0;
		var chunk = this.firstChunk;

		while (chunk) {
			var end = chunk.end;

			if (chunk.edited) {
				if (!isExcluded[charIndex]) {
					chunk.content = chunk.content.replace(pattern, replacer);

					if (chunk.content.length) {
						shouldIndentNextCharacter = chunk.content[chunk.content.length - 1] === '\n';
					}
				}
			} else {
				charIndex = chunk.start;

				while (charIndex < end) {
					if (!isExcluded[charIndex]) {
						var char = this.original[charIndex];

						if (char === '\n') {
							shouldIndentNextCharacter = true;
						} else if (char !== '\r' && shouldIndentNextCharacter) {
							shouldIndentNextCharacter = false;

							if (charIndex === chunk.start) {
								chunk.prependRight(indentStr);
							} else {
								this._splitChunk(chunk, charIndex);
								chunk = chunk.next;
								chunk.prependRight(indentStr);
							}
						}
					}

					charIndex += 1;
				}
			}

			charIndex = chunk.end;
			chunk = chunk.next;
		}

		this.outro = this.outro.replace(pattern, replacer);

		return this;
	};

	MagicString.prototype.insert = function insert () {
		throw new Error(
			'magicString.insert(...) is deprecated. Use prependRight(...) or appendLeft(...)'
		);
	};

	MagicString.prototype.insertLeft = function insertLeft (index, content) {
		if (!warned.insertLeft) {
			console.warn(
				'magicString.insertLeft(...) is deprecated. Use magicString.appendLeft(...) instead'
			); // eslint-disable-line no-console
			warned.insertLeft = true;
		}

		return this.appendLeft(index, content);
	};

	MagicString.prototype.insertRight = function insertRight (index, content) {
		if (!warned.insertRight) {
			console.warn(
				'magicString.insertRight(...) is deprecated. Use magicString.prependRight(...) instead'
			); // eslint-disable-line no-console
			warned.insertRight = true;
		}

		return this.prependRight(index, content);
	};

	MagicString.prototype.move = function move (start, end, index) {
		if (index >= start && index <= end) { throw new Error('Cannot move a selection inside itself'); }

		this._split(start);
		this._split(end);
		this._split(index);

		var first = this.byStart[start];
		var last = this.byEnd[end];

		var oldLeft = first.previous;
		var oldRight = last.next;

		var newRight = this.byStart[index];
		if (!newRight && last === this.lastChunk) { return this; }
		var newLeft = newRight ? newRight.previous : this.lastChunk;

		if (oldLeft) { oldLeft.next = oldRight; }
		if (oldRight) { oldRight.previous = oldLeft; }

		if (newLeft) { newLeft.next = first; }
		if (newRight) { newRight.previous = last; }

		if (!first.previous) { this.firstChunk = last.next; }
		if (!last.next) {
			this.lastChunk = first.previous;
			this.lastChunk.next = null;
		}

		first.previous = newLeft;
		last.next = newRight || null;

		if (!newLeft) { this.firstChunk = first; }
		if (!newRight) { this.lastChunk = last; }
		return this;
	};

	MagicString.prototype.overwrite = function overwrite (start, end, content, options) {
		if (typeof content !== 'string') { throw new TypeError('replacement content must be a string'); }

		while (start < 0) { start += this.original.length; }
		while (end < 0) { end += this.original.length; }

		if (end > this.original.length) { throw new Error('end is out of bounds'); }
		if (start === end)
			{ throw new Error(
				'Cannot overwrite a zero-length range – use appendLeft or prependRight instead'
			); }

		this._split(start);
		this._split(end);

		if (options === true) {
			if (!warned.storeName) {
				console.warn(
					'The final argument to magicString.overwrite(...) should be an options object. See https://github.com/rich-harris/magic-string'
				); // eslint-disable-line no-console
				warned.storeName = true;
			}

			options = { storeName: true };
		}
		var storeName = options !== undefined ? options.storeName : false;
		var contentOnly = options !== undefined ? options.contentOnly : false;

		if (storeName) {
			var original = this.original.slice(start, end);
			Object.defineProperty(this.storedNames, original, { writable: true, value: true, enumerable: true });
		}

		var first = this.byStart[start];
		var last = this.byEnd[end];

		if (first) {
			var chunk = first;
			while (chunk !== last) {
				if (chunk.next !== this.byStart[chunk.end]) {
					throw new Error('Cannot overwrite across a split point');
				}
				chunk = chunk.next;
				chunk.edit('', false);
			}

			first.edit(content, storeName, contentOnly);
		} else {
			// must be inserting at the end
			var newChunk = new Chunk(start, end, '').edit(content, storeName);

			// TODO last chunk in the array may not be the last chunk, if it's moved...
			last.next = newChunk;
			newChunk.previous = last;
		}
		return this;
	};

	MagicString.prototype.prepend = function prepend (content) {
		if (typeof content !== 'string') { throw new TypeError('outro content must be a string'); }

		this.intro = content + this.intro;
		return this;
	};

	MagicString.prototype.prependLeft = function prependLeft (index, content) {
		if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

		this._split(index);

		var chunk = this.byEnd[index];

		if (chunk) {
			chunk.prependLeft(content);
		} else {
			this.intro = content + this.intro;
		}
		return this;
	};

	MagicString.prototype.prependRight = function prependRight (index, content) {
		if (typeof content !== 'string') { throw new TypeError('inserted content must be a string'); }

		this._split(index);

		var chunk = this.byStart[index];

		if (chunk) {
			chunk.prependRight(content);
		} else {
			this.outro = content + this.outro;
		}
		return this;
	};

	MagicString.prototype.remove = function remove (start, end) {
		while (start < 0) { start += this.original.length; }
		while (end < 0) { end += this.original.length; }

		if (start === end) { return this; }

		if (start < 0 || end > this.original.length) { throw new Error('Character is out of bounds'); }
		if (start > end) { throw new Error('end must be greater than start'); }

		this._split(start);
		this._split(end);

		var chunk = this.byStart[start];

		while (chunk) {
			chunk.intro = '';
			chunk.outro = '';
			chunk.edit('');

			chunk = end > chunk.end ? this.byStart[chunk.end] : null;
		}
		return this;
	};

	MagicString.prototype.lastChar = function lastChar () {
		if (this.outro.length) { return this.outro[this.outro.length - 1]; }
		var chunk = this.lastChunk;
		do {
			if (chunk.outro.length) { return chunk.outro[chunk.outro.length - 1]; }
			if (chunk.content.length) { return chunk.content[chunk.content.length - 1]; }
			if (chunk.intro.length) { return chunk.intro[chunk.intro.length - 1]; }
		} while ((chunk = chunk.previous));
		if (this.intro.length) { return this.intro[this.intro.length - 1]; }
		return '';
	};

	MagicString.prototype.lastLine = function lastLine () {
		var lineIndex = this.outro.lastIndexOf(n);
		if (lineIndex !== -1) { return this.outro.substr(lineIndex + 1); }
		var lineStr = this.outro;
		var chunk = this.lastChunk;
		do {
			if (chunk.outro.length > 0) {
				lineIndex = chunk.outro.lastIndexOf(n);
				if (lineIndex !== -1) { return chunk.outro.substr(lineIndex + 1) + lineStr; }
				lineStr = chunk.outro + lineStr;
			}

			if (chunk.content.length > 0) {
				lineIndex = chunk.content.lastIndexOf(n);
				if (lineIndex !== -1) { return chunk.content.substr(lineIndex + 1) + lineStr; }
				lineStr = chunk.content + lineStr;
			}

			if (chunk.intro.length > 0) {
				lineIndex = chunk.intro.lastIndexOf(n);
				if (lineIndex !== -1) { return chunk.intro.substr(lineIndex + 1) + lineStr; }
				lineStr = chunk.intro + lineStr;
			}
		} while ((chunk = chunk.previous));
		lineIndex = this.intro.lastIndexOf(n);
		if (lineIndex !== -1) { return this.intro.substr(lineIndex + 1) + lineStr; }
		return this.intro + lineStr;
	};

	MagicString.prototype.slice = function slice (start, end) {
			if ( start === void 0 ) start = 0;
			if ( end === void 0 ) end = this.original.length;

		while (start < 0) { start += this.original.length; }
		while (end < 0) { end += this.original.length; }

		var result = '';

		// find start chunk
		var chunk = this.firstChunk;
		while (chunk && (chunk.start > start || chunk.end <= start)) {
			// found end chunk before start
			if (chunk.start < end && chunk.end >= end) {
				return result;
			}

			chunk = chunk.next;
		}

		if (chunk && chunk.edited && chunk.start !== start)
			{ throw new Error(("Cannot use replaced character " + start + " as slice start anchor.")); }

		var startChunk = chunk;
		while (chunk) {
			if (chunk.intro && (startChunk !== chunk || chunk.start === start)) {
				result += chunk.intro;
			}

			var containsEnd = chunk.start < end && chunk.end >= end;
			if (containsEnd && chunk.edited && chunk.end !== end)
				{ throw new Error(("Cannot use replaced character " + end + " as slice end anchor.")); }

			var sliceStart = startChunk === chunk ? start - chunk.start : 0;
			var sliceEnd = containsEnd ? chunk.content.length + end - chunk.end : chunk.content.length;

			result += chunk.content.slice(sliceStart, sliceEnd);

			if (chunk.outro && (!containsEnd || chunk.end === end)) {
				result += chunk.outro;
			}

			if (containsEnd) {
				break;
			}

			chunk = chunk.next;
		}

		return result;
	};

	// TODO deprecate this? not really very useful
	MagicString.prototype.snip = function snip (start, end) {
		var clone = this.clone();
		clone.remove(0, start);
		clone.remove(end, clone.original.length);

		return clone;
	};

	MagicString.prototype._split = function _split (index) {
		if (this.byStart[index] || this.byEnd[index]) { return; }

		var chunk = this.lastSearchedChunk;
		var searchForward = index > chunk.end;

		while (chunk) {
			if (chunk.contains(index)) { return this._splitChunk(chunk, index); }

			chunk = searchForward ? this.byStart[chunk.end] : this.byEnd[chunk.start];
		}
	};

	MagicString.prototype._splitChunk = function _splitChunk (chunk, index) {
		if (chunk.edited && chunk.content.length) {
			// zero-length edited chunks are a special case (overlapping replacements)
			var loc = getLocator(this.original)(index);
			throw new Error(
				("Cannot split a chunk that has already been edited (" + (loc.line) + ":" + (loc.column) + " – \"" + (chunk.original) + "\")")
			);
		}

		var newChunk = chunk.split(index);

		this.byEnd[index] = chunk;
		this.byStart[index] = newChunk;
		this.byEnd[newChunk.end] = newChunk;

		if (chunk === this.lastChunk) { this.lastChunk = newChunk; }

		this.lastSearchedChunk = chunk;
		return true;
	};

	MagicString.prototype.toString = function toString () {
		var str = this.intro;

		var chunk = this.firstChunk;
		while (chunk) {
			str += chunk.toString();
			chunk = chunk.next;
		}

		return str + this.outro;
	};

	MagicString.prototype.isEmpty = function isEmpty () {
		var chunk = this.firstChunk;
		do {
			if (
				(chunk.intro.length && chunk.intro.trim()) ||
				(chunk.content.length && chunk.content.trim()) ||
				(chunk.outro.length && chunk.outro.trim())
			)
				{ return false; }
		} while ((chunk = chunk.next));
		return true;
	};

	MagicString.prototype.length = function length () {
		var chunk = this.firstChunk;
		var length = 0;
		do {
			length += chunk.intro.length + chunk.content.length + chunk.outro.length;
		} while ((chunk = chunk.next));
		return length;
	};

	MagicString.prototype.trimLines = function trimLines () {
		return this.trim('[\\r\\n]');
	};

	MagicString.prototype.trim = function trim (charType) {
		return this.trimStart(charType).trimEnd(charType);
	};

	MagicString.prototype.trimEndAborted = function trimEndAborted (charType) {
		var rx = new RegExp((charType || '\\s') + '+$');

		this.outro = this.outro.replace(rx, '');
		if (this.outro.length) { return true; }

		var chunk = this.lastChunk;

		do {
			var end = chunk.end;
			var aborted = chunk.trimEnd(rx);

			// if chunk was trimmed, we have a new lastChunk
			if (chunk.end !== end) {
				if (this.lastChunk === chunk) {
					this.lastChunk = chunk.next;
				}

				this.byEnd[chunk.end] = chunk;
				this.byStart[chunk.next.start] = chunk.next;
				this.byEnd[chunk.next.end] = chunk.next;
			}

			if (aborted) { return true; }
			chunk = chunk.previous;
		} while (chunk);

		return false;
	};

	MagicString.prototype.trimEnd = function trimEnd (charType) {
		this.trimEndAborted(charType);
		return this;
	};
	MagicString.prototype.trimStartAborted = function trimStartAborted (charType) {
		var rx = new RegExp('^' + (charType || '\\s') + '+');

		this.intro = this.intro.replace(rx, '');
		if (this.intro.length) { return true; }

		var chunk = this.firstChunk;

		do {
			var end = chunk.end;
			var aborted = chunk.trimStart(rx);

			if (chunk.end !== end) {
				// special case...
				if (chunk === this.lastChunk) { this.lastChunk = chunk.next; }

				this.byEnd[chunk.end] = chunk;
				this.byStart[chunk.next.start] = chunk.next;
				this.byEnd[chunk.next.end] = chunk.next;
			}

			if (aborted) { return true; }
			chunk = chunk.next;
		} while (chunk);

		return false;
	};

	MagicString.prototype.trimStart = function trimStart (charType) {
		this.trimStartAborted(charType);
		return this;
	};

	var hasOwnProp = Object.prototype.hasOwnProperty;

	var Bundle = function Bundle(options) {
		if ( options === void 0 ) options = {};

		this.intro = options.intro || '';
		this.separator = options.separator !== undefined ? options.separator : '\n';
		this.sources = [];
		this.uniqueSources = [];
		this.uniqueSourceIndexByFilename = {};
	};

	Bundle.prototype.addSource = function addSource (source) {
		if (source instanceof MagicString) {
			return this.addSource({
				content: source,
				filename: source.filename,
				separator: this.separator,
			});
		}

		if (!isObject(source) || !source.content) {
			throw new Error(
				'bundle.addSource() takes an object with a `content` property, which should be an instance of MagicString, and an optional `filename`'
			);
		}

		['filename', 'indentExclusionRanges', 'separator'].forEach(function (option) {
			if (!hasOwnProp.call(source, option)) { source[option] = source.content[option]; }
		});

		if (source.separator === undefined) {
			// TODO there's a bunch of this sort of thing, needs cleaning up
			source.separator = this.separator;
		}

		if (source.filename) {
			if (!hasOwnProp.call(this.uniqueSourceIndexByFilename, source.filename)) {
				this.uniqueSourceIndexByFilename[source.filename] = this.uniqueSources.length;
				this.uniqueSources.push({ filename: source.filename, content: source.content.original });
			} else {
				var uniqueSource = this.uniqueSources[this.uniqueSourceIndexByFilename[source.filename]];
				if (source.content.original !== uniqueSource.content) {
					throw new Error(("Illegal source: same filename (" + (source.filename) + "), different contents"));
				}
			}
		}

		this.sources.push(source);
		return this;
	};

	Bundle.prototype.append = function append (str, options) {
		this.addSource({
			content: new MagicString(str),
			separator: (options && options.separator) || '',
		});

		return this;
	};

	Bundle.prototype.clone = function clone () {
		var bundle = new Bundle({
			intro: this.intro,
			separator: this.separator,
		});

		this.sources.forEach(function (source) {
			bundle.addSource({
				filename: source.filename,
				content: source.content.clone(),
				separator: source.separator,
			});
		});

		return bundle;
	};

	Bundle.prototype.generateDecodedMap = function generateDecodedMap (options) {
			var this$1$1 = this;
			if ( options === void 0 ) options = {};

		var names = [];
		this.sources.forEach(function (source) {
			Object.keys(source.content.storedNames).forEach(function (name) {
				if (!~names.indexOf(name)) { names.push(name); }
			});
		});

		var mappings = new Mappings(options.hires);

		if (this.intro) {
			mappings.advance(this.intro);
		}

		this.sources.forEach(function (source, i) {
			if (i > 0) {
				mappings.advance(this$1$1.separator);
			}

			var sourceIndex = source.filename ? this$1$1.uniqueSourceIndexByFilename[source.filename] : -1;
			var magicString = source.content;
			var locate = getLocator(magicString.original);

			if (magicString.intro) {
				mappings.advance(magicString.intro);
			}

			magicString.firstChunk.eachNext(function (chunk) {
				var loc = locate(chunk.start);

				if (chunk.intro.length) { mappings.advance(chunk.intro); }

				if (source.filename) {
					if (chunk.edited) {
						mappings.addEdit(
							sourceIndex,
							chunk.content,
							loc,
							chunk.storeName ? names.indexOf(chunk.original) : -1
						);
					} else {
						mappings.addUneditedChunk(
							sourceIndex,
							chunk,
							magicString.original,
							loc,
							magicString.sourcemapLocations
						);
					}
				} else {
					mappings.advance(chunk.content);
				}

				if (chunk.outro.length) { mappings.advance(chunk.outro); }
			});

			if (magicString.outro) {
				mappings.advance(magicString.outro);
			}
		});

		return {
			file: options.file ? options.file.split(/[/\\]/).pop() : null,
			sources: this.uniqueSources.map(function (source) {
				return options.file ? getRelativePath(options.file, source.filename) : source.filename;
			}),
			sourcesContent: this.uniqueSources.map(function (source) {
				return options.includeContent ? source.content : null;
			}),
			names: names,
			mappings: mappings.raw,
		};
	};

	Bundle.prototype.generateMap = function generateMap (options) {
		return new SourceMap(this.generateDecodedMap(options));
	};

	Bundle.prototype.getIndentString = function getIndentString () {
		var indentStringCounts = {};

		this.sources.forEach(function (source) {
			var indentStr = source.content.indentStr;

			if (indentStr === null) { return; }

			if (!indentStringCounts[indentStr]) { indentStringCounts[indentStr] = 0; }
			indentStringCounts[indentStr] += 1;
		});

		return (
			Object.keys(indentStringCounts).sort(function (a, b) {
				return indentStringCounts[a] - indentStringCounts[b];
			})[0] || '\t'
		);
	};

	Bundle.prototype.indent = function indent (indentStr) {
			var this$1$1 = this;

		if (!arguments.length) {
			indentStr = this.getIndentString();
		}

		if (indentStr === '') { return this; } // noop

		var trailingNewline = !this.intro || this.intro.slice(-1) === '\n';

		this.sources.forEach(function (source, i) {
			var separator = source.separator !== undefined ? source.separator : this$1$1.separator;
			var indentStart = trailingNewline || (i > 0 && /\r?\n$/.test(separator));

			source.content.indent(indentStr, {
				exclude: source.indentExclusionRanges,
				indentStart: indentStart, //: trailingNewline || /\r?\n$/.test( separator )  //true///\r?\n/.test( separator )
			});

			trailingNewline = source.content.lastChar() === '\n';
		});

		if (this.intro) {
			this.intro =
				indentStr +
				this.intro.replace(/^[^\n]/gm, function (match, index) {
					return index > 0 ? indentStr + match : match;
				});
		}

		return this;
	};

	Bundle.prototype.prepend = function prepend (str) {
		this.intro = str + this.intro;
		return this;
	};

	Bundle.prototype.toString = function toString () {
			var this$1$1 = this;

		var body = this.sources
			.map(function (source, i) {
				var separator = source.separator !== undefined ? source.separator : this$1$1.separator;
				var str = (i > 0 ? separator : '') + source.content.toString();

				return str;
			})
			.join('');

		return this.intro + body;
	};

	Bundle.prototype.isEmpty = function isEmpty () {
		if (this.intro.length && this.intro.trim()) { return false; }
		if (this.sources.some(function (source) { return !source.content.isEmpty(); })) { return false; }
		return true;
	};

	Bundle.prototype.length = function length () {
		return this.sources.reduce(
			function (length, source) { return length + source.content.length(); },
			this.intro.length
		);
	};

	Bundle.prototype.trimLines = function trimLines () {
		return this.trim('[\\r\\n]');
	};

	Bundle.prototype.trim = function trim (charType) {
		return this.trimStart(charType).trimEnd(charType);
	};

	Bundle.prototype.trimStart = function trimStart (charType) {
		var rx = new RegExp('^' + (charType || '\\s') + '+');
		this.intro = this.intro.replace(rx, '');

		if (!this.intro) {
			var source;
			var i = 0;

			do {
				source = this.sources[i++];
				if (!source) {
					break;
				}
			} while (!source.content.trimStartAborted(charType));
		}

		return this;
	};

	Bundle.prototype.trimEnd = function trimEnd (charType) {
		var rx = new RegExp((charType || '\\s') + '+$');

		var source;
		var i = this.sources.length - 1;

		do {
			source = this.sources[i--];
			if (!source) {
				this.intro = this.intro.replace(rx, '');
				break;
			}
		} while (!source.content.trimEndAborted(charType));

		return this;
	};

	MagicString.Bundle = Bundle;
	MagicString.SourceMap = SourceMap;
	MagicString.default = MagicString; // work around TypeScript bug https://github.com/Rich-Harris/magic-string/pull/121

	return MagicString;

}));
//# sourceMappingURL=magic-string.umd.js.map