Re-implement MD038 to handle multi-line spans better and rely less on RegExp.

This commit is contained in:
David Anson 2019-01-30 22:09:20 -08:00
parent 3b49414183
commit ff50da3b42
7 changed files with 235 additions and 40 deletions

View file

@ -70,7 +70,7 @@
"max-lines-per-function": "off",
"max-nested-callbacks": "error",
"max-params": ["error", 9],
"max-statements": ["error", 22],
"max-statements": ["error", 33],
"max-statements-per-line": "error",
"multiline-comment-style": ["error", "separate-lines"],
"multiline-ternary": "off",

View file

@ -4,49 +4,42 @@
const shared = require("./shared");
const inlineCodeSpansRe = /(?:^|[^\\])((`+)((?:[\s\S]*?[^`])|)\2(?!`))/g;
const startRe = /^\s([^`]|$)/;
const endRe = /[^`]\s$/;
module.exports = {
"names": [ "MD038", "no-space-in-code" ],
"description": "Spaces inside code span elements",
"tags": [ "whitespace", "code" ],
"function": function MD038(params, onError) {
let lastParent = null;
shared.forEachInlineChild(params, "code_inline",
function forToken(token, parent) {
if (lastParent !== parent) {
lastParent = parent;
inlineCodeSpansRe.lastIndex = 0;
}
const match = inlineCodeSpansRe.exec(parent.content);
const content = (match || [])[3];
const leftError = /^\s([^`]|$)/.test(content);
const rightError = /[^`]\s$/.test(content);
if (leftError || rightError) {
const inlineCodeSpan = match[1];
const leftContent = parent.content.substr(0,
match.index + (match[0].length - inlineCodeSpan.length));
const leftContentLines = leftContent.split(shared.newLineRe);
const inlineCodeSpanLines = inlineCodeSpan.split(shared.newLineRe);
let range = [
leftContentLines[leftContentLines.length - 1].length + 1,
inlineCodeSpanLines[0].length
];
if (leftError) {
shared.addErrorContext(onError, token.lineNumber,
inlineCodeSpan, true, false, range);
} else {
if (inlineCodeSpanLines.length > 1) {
range = [
1,
inlineCodeSpanLines[inlineCodeSpanLines.length - 1].length
];
shared.filterTokens(params, "inline", (token) => {
if (token.children.some((child) => child.type === "code_inline")) {
const tokenLines = params.lines.slice(token.map[0], token.map[1]);
shared.forEachInlineCodeSpan(
tokenLines.join("\n"),
(code, lineIndex, columnIndex, tickCount) => {
let rangeIndex = columnIndex - tickCount;
let rangeLength = code.length + (2 * tickCount);
let rangeLineOffset = 0;
const codeLines = code.split(shared.newLineRe);
const left = startRe.test(code);
const right = !left && endRe.test(code);
if (right && (codeLines.length > 1)) {
rangeIndex = 0;
rangeLineOffset = codeLines.length - 1;
}
shared.addErrorContext(onError,
token.lineNumber + content.split(shared.newLineRe).length - 1,
inlineCodeSpan, false, true, range);
}
}
});
if (left || right) {
if (codeLines.length > 1) {
rangeLength = codeLines[rangeLineOffset].length + tickCount;
}
const context = tokenLines[lineIndex + rangeLineOffset]
.substring(rangeIndex, rangeIndex + rangeLength);
shared.addErrorContext(
onError, token.lineNumber + lineIndex + rangeLineOffset,
context, left, right, [ rangeIndex + 1, rangeLength ]);
}
});
}
});
}
};

View file

@ -239,6 +239,69 @@ module.exports.forEachHeading = function forEachHeading(params, callback) {
});
};
// Calls the provided function for each inline code span's content
module.exports.forEachInlineCodeSpan =
function forEachInlineCodeSpan(input, callback) {
let currentLine = 0;
let currentColumn = 0;
let index = 0;
while (index < input.length) {
let startIndex = -1;
let startLine = -1;
let startColumn = -1;
let tickCount = 0;
let currentTicks = 0;
// Deliberate <= so trailing 0 completes the last span (ex: "text `code`")
for (; index <= input.length; index++) {
const char = input[index];
if (char === "`") {
// Count backticks at start or end of code span
currentTicks++;
if ((startIndex === -1) || (startColumn === -1)) {
startIndex = index + 1;
}
} else {
if ((startIndex >= 0) &&
(startColumn >= 0) &&
(tickCount === currentTicks)) {
// Found end backticks; invoke callback for code span
callback(
input.substring(startIndex, index - currentTicks),
startLine, startColumn, tickCount);
startIndex = -1;
startColumn = -1;
} else if ((startIndex >= 0) && (startColumn === -1)) {
// Found start backticks
tickCount = currentTicks;
startLine = currentLine;
startColumn = currentColumn;
}
// Not in backticks
currentTicks = 0;
}
if (char === "\n") {
// On next line
currentLine++;
currentColumn = 0;
} else if ((char === "\\") &&
((startIndex === -1) || (startColumn === -1))) {
// Escape character outside code, skip next
index++;
currentColumn += 2;
} else {
// On next column
currentColumn++;
}
}
if (startIndex >= 0) {
// Restart loop after unmatched start backticks (ex: "`text``code``")
index = startIndex;
currentLine = startLine;
currentColumn = startColumn;
}
}
};
// Returns (nested) lists as a flat array (in order)
module.exports.flattenLists = function flattenLists() {
return tokenCache.flattenedLists;

View file

@ -46,3 +46,13 @@ text.
* List
---
Text
text ```code
span code
span code ``` text
text
text text ```` code
span code
span```` text
text.

View file

@ -185,7 +185,7 @@
"ruleDescription": "Spaces inside code span elements",
"ruleInformation": "https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/Rules.md#md038",
"errorDetail": null,
"errorContext": "` code\nspan`",
"errorContext": "` code",
"errorRange": [ 6, 6 ]
},
{
@ -194,9 +194,27 @@
"ruleDescription": "Spaces inside code span elements",
"ruleInformation": "https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/Rules.md#md038",
"errorDetail": null,
"errorContext": "`code\nspan `",
"errorContext": "span `",
"errorRange": [ 1, 7 ]
},
{
"lineNumber": 53,
"ruleNames": [ "MD038", "no-space-in-code" ],
"ruleDescription": "Spaces inside code span elements",
"ruleInformation": "https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/Rules.md#md038",
"errorDetail": null,
"errorContext": "span code ```",
"errorRange": [ 1, 13 ]
},
{
"lineNumber": 55,
"ruleNames": [ "MD038", "no-space-in-code" ],
"ruleDescription": "Spaces inside code span elements",
"ruleInformation": "https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/Rules.md#md038",
"errorDetail": null,
"errorContext": "```` code",
"errorRange": [ 11, 9 ]
},
{
"lineNumber": 19,
"ruleNames": [ "MD039", "no-space-in-links" ],

View file

@ -56,3 +56,13 @@ text `code
span code
span ` text {MD038}
text.
Text
text `code
span code
span ` text {MD038}
text
text ` code {MD038}
span code
span` text
text.

View file

@ -1420,6 +1420,107 @@ module.exports.trimLeftRight = function trimLeftRight(test) {
test.done();
};
module.exports.forEachInlineCodeSpan = function forEachInlineCodeSpan(test) {
test.expect(94);
const testCases =
[
[
"`code`",
[ [ "code", 0, 1, 1 ] ]
],
[
"text `code` text",
[ [ "code", 0, 6, 1 ] ]
],
[
"text `code` text `edoc`",
[
[ "code", 0, 6, 1 ],
[ "edoc", 0, 18, 1 ]
]
],
[
"text `code` text `edoc` text",
[
[ "code", 0, 6, 1 ],
[ "edoc", 0, 18, 1 ]
]
],
[
"text ``code`code`` text",
[ [ "code`code", 0, 7, 2 ] ]
],
[
"`code `` code`",
[ [ "code `` code", 0, 1, 1 ] ]
],
[
"`code\\`text`",
[ [ "code\\", 0, 1, 1 ] ]
],
[
"``\ncode\n``",
[ [ "\ncode\n", 0, 2, 2 ] ]
],
[
"text\n`code`\ntext",
[ [ "code", 1, 1, 1 ] ]
],
[
"text\ntext\n`code`\ntext\n`edoc`\ntext",
[
[ "code", 2, 1, 1 ],
[ "edoc", 4, 1, 1 ]
]
],
[
"text `code\nedoc` text",
[ [ "code\nedoc", 0, 6, 1 ] ]
],
[
"> text `code` text",
[ [ "code", 0, 8, 1 ] ]
],
[
"> text\n> `code`\n> text",
[ [ "code", 1, 3, 1 ] ]
],
[
"> text\n> `code\n> edoc`\n> text",
[ [ "code\n> edoc", 1, 3, 1 ] ]
],
[
"```text``",
[]
],
[
"text `text text",
[]
],
[
"`text``code``",
[ [ "code", 0, 7, 2 ] ]
],
[
"text \\` text `code`",
[ [ "code", 0, 14, 1 ] ]
]
];
testCases.forEach((testCase) => {
const [ input, expecteds ] = testCase;
shared.forEachInlineCodeSpan(input, (code, line, column, ticks) => {
const [ expectedCode, expectedLine, expectedColumn, expectedTicks ] =
expecteds.shift();
test.equal(code, expectedCode, input);
test.equal(line, expectedLine, input);
test.equal(column, expectedColumn, input);
test.equal(ticks, expectedTicks, input);
});
test.equal(expecteds.length, 0, "length");
});
test.done();
};
module.exports.configSingle = function configSingle(test) {
test.expect(2);
markdownlint.readConfig("./test/config/config-child.json",