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56 lines
2.3 KiB
TypeScript
56 lines
2.3 KiB
TypeScript
// Loaded from https://deno.land/x/graphql_deno@v15.0.0/lib/language/printLocation.js
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import { getLocation } from './location.js';
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/**
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* Render a helpful description of the location in the GraphQL Source document.
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*/
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export function printLocation(location) {
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return printSourceLocation(location.source, getLocation(location.source, location.start));
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}
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/**
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* Render a helpful description of the location in the GraphQL Source document.
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*/
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export function printSourceLocation(source, sourceLocation) {
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const firstLineColumnOffset = source.locationOffset.column - 1;
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const body = whitespace(firstLineColumnOffset) + source.body;
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const lineIndex = sourceLocation.line - 1;
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const lineOffset = source.locationOffset.line - 1;
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const lineNum = sourceLocation.line + lineOffset;
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const columnOffset = sourceLocation.line === 1 ? firstLineColumnOffset : 0;
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const columnNum = sourceLocation.column + columnOffset;
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const locationStr = `${source.name}:${lineNum}:${columnNum}\n`;
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const lines = body.split(/\r\n|[\n\r]/g);
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const locationLine = lines[lineIndex]; // Special case for minified documents
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if (locationLine.length > 120) {
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const subLineIndex = Math.floor(columnNum / 80);
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const subLineColumnNum = columnNum % 80;
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const subLines = [];
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for (let i = 0; i < locationLine.length; i += 80) {
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subLines.push(locationLine.slice(i, i + 80));
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}
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return locationStr + printPrefixedLines([[`${lineNum}`, subLines[0]], ...subLines.slice(1, subLineIndex + 1).map(subLine => ['', subLine]), [' ', whitespace(subLineColumnNum - 1) + '^'], ['', subLines[subLineIndex + 1]]]);
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}
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return locationStr + printPrefixedLines([// Lines specified like this: ["prefix", "string"],
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[`${lineNum - 1}`, lines[lineIndex - 1]], [`${lineNum}`, locationLine], ['', whitespace(columnNum - 1) + '^'], [`${lineNum + 1}`, lines[lineIndex + 1]]]);
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}
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function printPrefixedLines(lines) {
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const existingLines = lines.filter(([_, line]) => line !== undefined);
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const padLen = Math.max(...existingLines.map(([prefix]) => prefix.length));
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return existingLines.map(([prefix, line]) => leftPad(padLen, prefix) + (line ? ' | ' + line : ' |')).join('\n');
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}
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function whitespace(len) {
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return Array(len + 1).join(' ');
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}
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function leftPad(len, str) {
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return whitespace(len - str.length) + str;
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} |