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magic-string.es.js
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Created: Mon, Feb 10, 20:46

magic-string.es.js
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	import { encode } from 'sourcemap-codec';

	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 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;
	};

	export { Bundle, SourceMap, MagicString as default };
	//# sourceMappingURL=magic-string.es.js.map

Event Timeline