nx
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JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.codeFrameColumns = codeFrameColumns;
// Adapted from https://raw.githubusercontent.com/babel/babel/4108524/packages/babel-code-frame/src/index.js
const chalk = require("chalk");
/**
* Chalk styles for code frame token types.
*/
function getDefs(chalk) {
return {
gutter: chalk.grey,
marker: chalk.red.bold,
message: chalk.red.bold,
};
}
/**
* RegExp to test for newlines in terminal.
*/
const NEWLINE = /\r\n|[\n\r\u2028\u2029]/;
/**
* Extract what lines should be marked and highlighted.
*/
function getMarkerLines(loc, source, opts = {}) {
const startLoc = {
column: 0,
line: -1,
...loc.start,
};
const endLoc = {
...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 defs = getDefs(chalk);
const lines = rawLines.split(NEWLINE);
const { start, end, markerLines } = getMarkerLines(loc, lines, opts);
const numberMaxWidth = String(end).length;
const highlightedLines = opts.highlight ? opts.highlight(rawLines) : 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];
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 ',
defs.gutter(gutter.replace(/\d/g, ' ')),
markerSpacing,
defs.marker('^').repeat(numberOfMarkers),
].join('');
}
return [defs.marker('>'), defs.gutter(gutter), line, markerLine].join('');
}
else {
return ` ${defs.gutter(gutter)}${line}`;
}
})
.join('\n');
return chalk.reset(frame);
}