Files F101488270

css-syntax-error.js
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Created: Mon, Feb 10, 22:51

css-syntax-error.js
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	'use strict'

	let pico = require('picocolors')

	let terminalHighlight = require('./terminal-highlight')

	class CssSyntaxError extends Error {
	constructor(message, line, column, source, file, plugin) {
	super(message)
	this.name = 'CssSyntaxError'
	this.reason = message

	if (file) {
	this.file = file
	}
	if (source) {
	this.source = source
	}
	if (plugin) {
	this.plugin = plugin
	}
	if (typeof line !== 'undefined' && typeof column !== 'undefined') {
	if (typeof line === 'number') {
	this.line = line
	this.column = column
	} else {
	this.line = line.line
	this.column = line.column
	this.endLine = column.line
	this.endColumn = column.column
	}
	}

	this.setMessage()

	if (Error.captureStackTrace) {
	Error.captureStackTrace(this, CssSyntaxError)
	}
	}

	setMessage() {
	this.message = this.plugin ? this.plugin + ': ' : ''
	this.message += this.file ? this.file : '<css input>'
	if (typeof this.line !== 'undefined') {
	this.message += ':' + this.line + ':' + this.column
	}
	this.message += ': ' + this.reason
	}

	showSourceCode(color) {
	if (!this.source) return ''

	let css = this.source
	if (color == null) color = pico.isColorSupported
	if (terminalHighlight) {
	if (color) css = terminalHighlight(css)
	}

	let lines = css.split(/\r?\n/)
	let start = Math.max(this.line - 3, 0)
	let end = Math.min(this.line + 2, lines.length)

	let maxWidth = String(end).length

	let mark, aside
	if (color) {
	let { bold, red, gray } = pico.createColors(true)
	mark = text => bold(red(text))
	aside = text => gray(text)
	} else {
	mark = aside = str => str
	}

	return lines
	.slice(start, end)
	.map((line, index) => {
	let number = start + 1 + index
	let gutter = ' ' + (' ' + number).slice(-maxWidth) + ' \| '
	if (number === this.line) {
	let spacing =
	aside(gutter.replace(/\d/g, ' ')) +
	line.slice(0, this.column - 1).replace(/[^\t]/g, ' ')
	return mark('>') + aside(gutter) + line + '\n ' + spacing + mark('^')
	}
	return ' ' + aside(gutter) + line
	})
	.join('\n')
	}

	toString() {
	let code = this.showSourceCode()
	if (code) {
	code = '\n\n' + code + '\n'
	}
	return this.name + ': ' + this.message + code
	}
	}

	module.exports = CssSyntaxError
	CssSyntaxError.default = CssSyntaxError

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