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refactor: use getLocFromIndex in no-invalid-label-refs #546

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Merged
merged 3 commits into from
Oct 2, 2025
+26 −35
Merged

refactor: use getLocFromIndex in no-invalid-label-refs #546

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ca88087
refactor: use `getLocFromIndex` in `no-invalid-label-refs`
lumirlumir Oct 1, 2025
a1231c5
wip
lumirlumir Oct 1, 2025
ae1b887
Update src/rules/no-invalid-label-refs.js
lumirlumir Oct 1, 2025
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47 changes: 12 additions & 35 deletions src/rules/no-invalid-label-refs.js
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@
// Imports
//-----------------------------------------------------------------------------

import { findOffsets, illegalShorthandTailPattern } from "../util.js";
import { illegalShorthandTailPattern } from "../util.js";

//-----------------------------------------------------------------------------
// Type Definitions
Expand All @@ -17,33 +17,30 @@ import { findOffsets, illegalShorthandTailPattern } from "../util.js";
* @import { Position } from "unist";
* @import { Text } from "mdast";
* @import { MarkdownRuleDefinition } from "../types.js";
* @import { MarkdownSourceCode } from "../index.js";
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This change was motivated by #366 (comment).

The Parameters<MarkdownRuleDefinition['create']>[0]['sourceCode'] expression was needed due to a collision between rollup and tools/dedupe-types at the time, but since @eslint/markdown no longer uses rollup, it's now safe to use ../index.js.

* @typedef {"invalidLabelRef"} NoInvalidLabelRefsMessageIds
* @typedef {[]} NoInvalidLabelRefsOptions
* @typedef {MarkdownRuleDefinition<{ RuleOptions: NoInvalidLabelRefsOptions, MessageIds: NoInvalidLabelRefsMessageIds }>} NoInvalidLabelRefsRuleDefinition
* @typedef {Parameters<MarkdownRuleDefinition['create']>[0]['sourceCode']} SourceCode
*/

//-----------------------------------------------------------------------------
// Helpers
//-----------------------------------------------------------------------------

// matches i.e., [foo][bar]
/** matches i.e., `[foo][bar]` */
const labelPattern = /\]\[([^\]]+)\]/u;

/**
* Finds missing references in a node.
* @param {Text} node The node to check.
* @param {SourceCode} sourceCode The Markdown source code object.
* @param {MarkdownSourceCode} sourceCode The Markdown source code object.
* @returns {Array<{label:string,position:Position}>} The missing references.
*/
function findInvalidLabelReferences(node, sourceCode) {
const nodeText = sourceCode.getText(node);
const docText = sourceCode.text;
const invalid = [];
let startIndex = 0;
const offset = node.position.start.offset;
const nodeStartLine = node.position.start.line;
const nodeStartColumn = node.position.start.column;

/*
* This loop works by searching the string inside the node for the next
Expand All @@ -66,16 +63,16 @@ function findInvalidLabelReferences(node, sourceCode) {
}

/*
* Calculate the match index relative to just the node and
* to the entire document text.
* Adjust `labelPattern` match index to the full source code.
*/
const nodeMatchIndex = startIndex + match.index;
const docMatchIndex = offset + nodeMatchIndex;
const startOffset =
startIndex + match.index + node.position.start.offset;
const endOffset = startOffset + match[0].length;

/*
* Search the entire document text to find the preceding open bracket.
*/
const lastOpenBracketIndex = docText.lastIndexOf("[", docMatchIndex);
const lastOpenBracketIndex = docText.lastIndexOf("[", startOffset);

if (lastOpenBracketIndex === -1) {
startIndex += match.index + match[0].length;
Expand All @@ -87,34 +84,14 @@ function findInvalidLabelReferences(node, sourceCode) {
* take that into account when calculating the line and column offsets.
*/
const label = docText
.slice(lastOpenBracketIndex, docMatchIndex + match[0].length)
.slice(lastOpenBracketIndex, endOffset)
.match(/!?\[([^\]]+)\]/u)[1];

// find location of [ in the document text
const { lineOffset: startLineOffset, columnOffset: startColumnOffset } =
findOffsets(nodeText, nodeMatchIndex + 1);

// find location of [ in the document text
const { lineOffset: endLineOffset, columnOffset: endColumnOffset } =
findOffsets(nodeText, nodeMatchIndex + match[0].length);

const startLine = nodeStartLine + startLineOffset;
const startColumn = nodeStartColumn + startColumnOffset;
const endLine = nodeStartLine + endLineOffset;
const endColumn =
(endLine === startLine ? nodeStartColumn : 1) + endColumnOffset;

invalid.push({
label: label.trim(),
position: {
start: {
line: startLine,
column: startColumn,
},
end: {
line: endLine,
column: endColumn,
},
start: sourceCode.getLocFromIndex(startOffset + 1),
end: sourceCode.getLocFromIndex(endOffset),
},
});

Expand Down
13 changes: 13 additions & 0 deletions tests/rules/no-invalid-label-refs.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -206,5 +206,18 @@ ruleTester.run("no-invalid-label-refs", rule, {
},
],
},
{
code: "[*eslint*][ ]",
errors: [
{
messageId: "invalidLabelRef",
data: { label: "*eslint*" },
line: 1,
column: 11,
endLine: 1,
endColumn: 14,
},
],
},
],
});
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