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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 | |