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- import { getLocation } from './location.mjs';
- /**
- * Render a helpful description of the location in the GraphQL Source document.
- */
- export function printLocation(location) {
- return printSourceLocation(
- location.source,
- getLocation(location.source, location.start),
- );
- }
- /**
- * Render a helpful description of the location in the GraphQL Source document.
- */
- export function printSourceLocation(source, sourceLocation) {
- const firstLineColumnOffset = source.locationOffset.column - 1;
- const body = ''.padStart(firstLineColumnOffset) + source.body;
- const lineIndex = sourceLocation.line - 1;
- const lineOffset = source.locationOffset.line - 1;
- const lineNum = sourceLocation.line + lineOffset;
- const columnOffset = sourceLocation.line === 1 ? firstLineColumnOffset : 0;
- const columnNum = sourceLocation.column + columnOffset;
- const locationStr = `${source.name}:${lineNum}:${columnNum}\n`;
- const lines = body.split(/\r\n|[\n\r]/g);
- const locationLine = lines[lineIndex]; // Special case for minified documents
- if (locationLine.length > 120) {
- const subLineIndex = Math.floor(columnNum / 80);
- const subLineColumnNum = columnNum % 80;
- const subLines = [];
- for (let i = 0; i < locationLine.length; i += 80) {
- subLines.push(locationLine.slice(i, i + 80));
- }
- return (
- locationStr +
- printPrefixedLines([
- [`${lineNum} |`, subLines[0]],
- ...subLines.slice(1, subLineIndex + 1).map((subLine) => ['|', subLine]),
- ['|', '^'.padStart(subLineColumnNum)],
- ['|', subLines[subLineIndex + 1]],
- ])
- );
- }
- return (
- locationStr +
- printPrefixedLines([
- // Lines specified like this: ["prefix", "string"],
- [`${lineNum - 1} |`, lines[lineIndex - 1]],
- [`${lineNum} |`, locationLine],
- ['|', '^'.padStart(columnNum)],
- [`${lineNum + 1} |`, lines[lineIndex + 1]],
- ])
- );
- }
- function printPrefixedLines(lines) {
- const existingLines = lines.filter(([_, line]) => line !== undefined);
- const padLen = Math.max(...existingLines.map(([prefix]) => prefix.length));
- return existingLines
- .map(([prefix, line]) => prefix.padStart(padLen) + (line ? ' ' + line : ''))
- .join('\n');
- }
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