stylint/src/checks/quotePref.js

A linter for stylus

'use strict'

var stringRe = /(?=["'])(?:"[^"\\]*(?:\\[\s\S][^"\\]*)*"|'[^'\\]*(?:\\[\s\S][^'\\]*)*')/g


/**
 * @description check that quote style is consistent with config
 * @param  {string} [line] curr line being linted
 * @param {string} [origLine] curr line before being stripped
 * @return {boolean} true if in order, false if not
 */
var quotePref = function( line, origLine ) {
	if ( origLine.indexOf( '"' ) === -1 &&
			origLine.indexOf( "'" ) === -1 ) {
		return
	}

	stringRe.lastIndex = 0

	var badQuotes = false
	var hasInnerQuote = true
	var match

	// for each quote match, check err
	while ( ( match = stringRe.exec( origLine ) ) !== null ) {
		// just checks the first inner quote, most common case
		// almost certainly not the best way to do this
		var content = match[0].slice( 1, -1 )

		// if '' quotes preferred and match starts with double "" quote
		if ( this.state.conf === 'single' && match[0].indexOf( '"' ) === 0 ) {
			// "" is allowed when it's cases like "Someone's string here"
			hasInnerQuote = content.indexOf( "'" ) !== -1

			if ( !hasInnerQuote ) {
				badQuotes = true
				this.msg( 'preferred quote style is ' + this.state.conf + ' quotes', match[0].indexOf( '"' ) )
			}
		}
		// if "" quotes preferred and match start with single '' quote
		else if ( this.state.conf === 'double' && match[0].indexOf( "'" ) === 0 ) {
			// "" is allowed when it's cases like "Someone's string here"
			hasInnerQuote = content.indexOf( '"' ) !== -1

			if ( !hasInnerQuote ) {
				badQuotes = true
				this.msg( 'preferred quote style is ' + this.state.conf + ' quotes', match[0].indexOf( "'" ) )
			}
		}
	}

	return badQuotes
}

module.exports = quotePref