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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
let aside = text => text
let mark = text => text
let highlight = text => text
if (color) {
let { bold, gray, red } = pico.createColors(true)
mark = text => bold(red(text))
aside = text => gray(text)
if (terminalHighlight) {
highlight = text => terminalHighlight(text)
}
}
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
return lines
.slice(start, end)
.map((line, index) => {
let number = start + 1 + index
let gutter = ' ' + (' ' + number).slice(-maxWidth) + ' | '
if (number === this.line) {
if (line.length > 160) {
let padding = 20
let subLineStart = Math.max(0, this.column - padding)
let subLineEnd = Math.max(
this.column + padding,
this.endColumn + padding
)
let subLine = line.slice(subLineStart, subLineEnd)
let spacing =
aside(gutter.replace(/\d/g, ' ')) +
line
.slice(0, Math.min(this.column - 1, padding - 1))
.replace(/[^\t]/g, ' ')
return (
mark('>') +
aside(gutter) +
highlight(subLine) +
'\n ' +
spacing +
mark('^')
)
}
let spacing =
aside(gutter.replace(/\d/g, ' ')) +
line.slice(0, this.column - 1).replace(/[^\t]/g, ' ')
return (
mark('>') +
aside(gutter) +
highlight(line) +
'\n ' +
spacing +
mark('^')
)
}
return ' ' + aside(gutter) + highlight(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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