'use strict'
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let pico = require('picocolors')
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let terminalHighlight = require('./terminal-highlight')
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class CssSyntaxError extends Error {
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constructor(message, line, column, source, file, plugin) {
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super(message)
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this.name = 'CssSyntaxError'
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this.reason = message
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if (file) {
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this.file = file
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}
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if (source) {
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this.source = source
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}
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if (plugin) {
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this.plugin = plugin
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}
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if (typeof line !== 'undefined' && typeof column !== 'undefined') {
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if (typeof line === 'number') {
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this.line = line
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this.column = column
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} else {
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this.line = line.line
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this.column = line.column
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this.endLine = column.line
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this.endColumn = column.column
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}
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}
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this.setMessage()
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if (Error.captureStackTrace) {
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Error.captureStackTrace(this, CssSyntaxError)
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}
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}
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setMessage() {
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this.message = this.plugin ? this.plugin + ': ' : ''
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this.message += this.file ? this.file : '<css input>'
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if (typeof this.line !== 'undefined') {
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this.message += ':' + this.line + ':' + this.column
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}
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this.message += ': ' + this.reason
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}
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showSourceCode(color) {
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if (!this.source) return ''
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let css = this.source
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if (color == null) color = pico.isColorSupported
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let aside = text => text
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let mark = text => text
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let highlight = text => text
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if (color) {
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let { bold, gray, red } = pico.createColors(true)
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mark = text => bold(red(text))
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aside = text => gray(text)
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if (terminalHighlight) {
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highlight = text => terminalHighlight(text)
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}
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}
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let lines = css.split(/\r?\n/)
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let start = Math.max(this.line - 3, 0)
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let end = Math.min(this.line + 2, lines.length)
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let maxWidth = String(end).length
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return lines
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.slice(start, end)
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.map((line, index) => {
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let number = start + 1 + index
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let gutter = ' ' + (' ' + number).slice(-maxWidth) + ' | '
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if (number === this.line) {
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if (line.length > 160) {
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let padding = 20
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let subLineStart = Math.max(0, this.column - padding)
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let subLineEnd = Math.max(
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this.column + padding,
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this.endColumn + padding
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)
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let subLine = line.slice(subLineStart, subLineEnd)
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let spacing =
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aside(gutter.replace(/\d/g, ' ')) +
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line
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.slice(0, Math.min(this.column - 1, padding - 1))
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.replace(/[^\t]/g, ' ')
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return (
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mark('>') +
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aside(gutter) +
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highlight(subLine) +
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'\n ' +
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spacing +
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mark('^')
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)
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}
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let spacing =
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aside(gutter.replace(/\d/g, ' ')) +
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line.slice(0, this.column - 1).replace(/[^\t]/g, ' ')
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return (
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mark('>') +
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aside(gutter) +
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highlight(line) +
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'\n ' +
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spacing +
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mark('^')
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)
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}
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return ' ' + aside(gutter) + highlight(line)
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})
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.join('\n')
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}
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toString() {
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let code = this.showSourceCode()
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if (code) {
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code = '\n\n' + code + '\n'
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}
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return this.name + ': ' + this.message + code
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}
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}
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module.exports = CssSyntaxError
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CssSyntaxError.default = CssSyntaxError
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