Method indent

src/MagicString.js:207–293

(indentStr, options)

	}

	indent(indentStr, options) {
		const pattern = /^[^\r\n]/gm;

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

		if (indentStr === undefined) {
			this._ensureindentStr();
			indentStr = this.indentStr || '\t';
		}

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

		options = options || {};

		// Process exclusion ranges
		const isExcluded = {};

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

		let shouldIndentNextCharacter = options.indentStart !== false;
		const replacer = (match) => {
			if (shouldIndentNextCharacter) return `${indentStr}${match}`;
			shouldIndentNextCharacter = true;
			return match;
		};

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

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

		while (chunk) {
			const 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]) {