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index.js 4.60 KiB
"use strict";
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.codeFrameColumns = codeFrameColumns;
exports.default = _default;
var _highlight = require("@babel/highlight");
let deprecationWarningShown = false;
function getDefs(chalk) {
  return {
    gutter: chalk.grey,
    marker: chalk.red.bold,
    message: chalk.red.bold
const NEWLINE = /\r\n|[\n\r\u2028\u2029]/;
function getMarkerLines(loc, source, opts) {
  const startLoc = Object.assign({
    column: 0,
    line: -1
  }, loc.start);
  const endLoc = Object.assign({}, startLoc, loc.end);
  const {
    linesAbove = 2,
    linesBelow = 3
  } = opts || {};
  const startLine = startLoc.line;
  const startColumn = startLoc.column;
  const endLine = endLoc.line;
  const endColumn = endLoc.column;
  let start = Math.max(startLine - (linesAbove + 1), 0);
  let end = Math.min(source.length, endLine + linesBelow);
  if (startLine === -1) {
    start = 0;
  if (endLine === -1) {
    end = source.length;
  const lineDiff = endLine - startLine;
  const markerLines = {};
  if (lineDiff) {
    for (let i = 0; i <= lineDiff; i++) {
      const lineNumber = i + startLine;
      if (!startColumn) {
        markerLines[lineNumber] = true;
      } else if (i === 0) {
        const sourceLength = source[lineNumber - 1].length;
        markerLines[lineNumber] = [startColumn, sourceLength - startColumn + 1];
      } else if (i === lineDiff) {
        markerLines[lineNumber] = [0, endColumn];
      } else {
        const sourceLength = source[lineNumber - i].length;
        markerLines[lineNumber] = [0, sourceLength];
  } else {
    if (startColumn === endColumn) {
      if (startColumn) {
        markerLines[startLine] = [startColumn, 0];
} else { markerLines[startLine] = true; } } else { markerLines[startLine] = [startColumn, endColumn - startColumn]; } } return { start, end, markerLines }; } function codeFrameColumns(rawLines, loc, opts = {}) { const highlighted = (opts.highlightCode || opts.forceColor) && (0, _highlight.shouldHighlight)(opts); const chalk = (0, _highlight.getChalk)(opts); const defs = getDefs(chalk); const maybeHighlight = (chalkFn, string) => { return highlighted ? chalkFn(string) : string; }; const lines = rawLines.split(NEWLINE); const { start, end, markerLines } = getMarkerLines(loc, lines, opts); const hasColumns = loc.start && typeof loc.start.column === "number"; const numberMaxWidth = String(end).length; const highlightedLines = highlighted ? (0, _highlight.default)(rawLines, opts) : rawLines; let frame = highlightedLines.split(NEWLINE).slice(start, end).map((line, index) => { const number = start + 1 + index; const paddedNumber = ` ${number}`.slice(-numberMaxWidth); const gutter = ` ${paddedNumber} |`; const hasMarker = markerLines[number]; const lastMarkerLine = !markerLines[number + 1]; if (hasMarker) { let markerLine = ""; if (Array.isArray(hasMarker)) { const markerSpacing = line.slice(0, Math.max(hasMarker[0] - 1, 0)).replace(/[^\t]/g, " "); const numberOfMarkers = hasMarker[1] || 1; markerLine = ["\n ", maybeHighlight(defs.gutter, gutter.replace(/\d/g, " ")), " ", markerSpacing, maybeHighlight(defs.marker, "^").repeat(numberOfMarkers)].join(""); if (lastMarkerLine && opts.message) { markerLine += " " + maybeHighlight(defs.message, opts.message); } } return [maybeHighlight(defs.marker, ">"), maybeHighlight(defs.gutter, gutter), line.length > 0 ? ` ${line}` : "", markerLine].join(""); } else { return ` ${maybeHighlight(defs.gutter, gutter)}${line.length > 0 ? ` ${line}` : ""}`; } }).join("\n"); if (opts.message && !hasColumns) { frame = `${" ".repeat(numberMaxWidth + 1)}${opts.message}\n${frame}`; } if (highlighted) { return chalk.reset(frame); } else { return frame; } }
function _default(rawLines, lineNumber, colNumber, opts = {}) { if (!deprecationWarningShown) { deprecationWarningShown = true; const message = "Passing lineNumber and colNumber is deprecated to @babel/code-frame. Please use `codeFrameColumns`."; if (process.emitWarning) { process.emitWarning(message, "DeprecationWarning"); } else { const deprecationError = new Error(message); deprecationError.name = "DeprecationWarning"; console.warn(new Error(message)); } } colNumber = Math.max(colNumber, 0); const location = { start: { column: colNumber, line: lineNumber } }; return codeFrameColumns(rawLines, location, opts); }