avalon-loader/deindent.js

A single-file webpack loader for avalon.js

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Evan You @yyx990803
*/
var splitRE = /\r?\n/g;
var emptyRE = /^\s*$/;
var needFixRE = /^(\r?\n)*[\t\s]/;

module.exports = function deindent( str ) {
	if ( !needFixRE.test( str ) ) {
		return str;
	}
	var lines = str.split( splitRE );
	var min = Infinity;
	var type,
		cur,
		c;
	for ( var i = 0; i < lines.length; i++ ) {
		var line = lines[ i ];
		if ( !emptyRE.test( line ) ) {
			if ( !type ) {
				c = line.charAt( 0 );
				if ( c === ' ' || c === '\t' ) {
					type = c;
					cur = count( line, type );
					if ( cur < min ) {
						min = cur;
					}
				} else {
					return str;
				}
			} else {
				cur = count( line, type );
				if ( cur < min ) {
					min = cur;
				}
			}
		}
	}
	return lines.map( function ( line ) {
		return line.slice( min );
	} ).join( '\n' );
};

function count( line, type ) {
	var i = 0;
	while ( line.charAt( i ) === type ) {
		i++;
	}
	return i;
}