From c3e8eab87b51d2e2786ec6c00126bd307d5f754d Mon Sep 17 00:00:00 2001
From: David Anson <david@dlaa.me>
Date: Sun, 28 Jul 2019 16:48:32 -0700
Subject: [PATCH] Update MD038/no-space-in-code to ignore backticks in link
 destinations (fixes #206).

---
 .eslintrc.json                          |  3 ++-
 helpers/helpers.js                      | 17 ++++++++++++++-
 test/spaces_inside_codespan_elements.md | 28 +++++++++++++++++++++++++
 3 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/.eslintrc.json b/.eslintrc.json
index 4f33347f..c63e314e 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -12,6 +12,7 @@
     "array-bracket-spacing": ["error", "always"],
     "array-element-newline": "off",
     "capitalized-comments": "off",
+    "complexity": "off",
     "dot-location": ["error", "property"],
     "func-style": ["error", "declaration"],
     "function-paren-newline": "off",
@@ -22,7 +23,7 @@
     "max-lines": "off",
     "max-lines-per-function": "off",
     "max-params": ["error", 10],
-    "max-statements": ["error", 33],
+    "max-statements": "off",
     "multiline-comment-style": ["error", "separate-lines"],
     "multiline-ternary": "off",
     "newline-per-chained-call": "off",
diff --git a/helpers/helpers.js b/helpers/helpers.js
index a8f1ae60..288972f5 100644
--- a/helpers/helpers.js
+++ b/helpers/helpers.js
@@ -259,10 +259,25 @@ module.exports.forEachInlineCodeSpan =
       let startColumn = -1;
       let tickCount = 0;
       let currentTicks = 0;
+      let state = "normal";
       // Deliberate <= so trailing 0 completes the last span (ex: "text `code`")
       for (; index <= input.length; index++) {
         const char = input[index];
-        if (char === "`") {
+        // Ignore backticks in link destination
+        if ((char === "[") && (state === "normal")) {
+          state = "linkTextOpen";
+        } else if ((char === "]") && (state === "linkTextOpen")) {
+          state = "linkTextClosed";
+        } else if ((char === "(") && (state === "linkTextClosed")) {
+          state = "linkDestinationOpen";
+        } else if (
+          ((char === "(") && (state === "linkDestinationOpen")) ||
+          ((char === ")") && (state === "linkDestinationOpen")) ||
+          (state === "linkTextClosed")) {
+          state = "normal";
+        }
+        // Parse backtick open/close
+        if ((char === "`") && (state !== "linkDestinationOpen")) {
           // Count backticks at start or end of code span
           currentTicks++;
           if ((startIndex === -1) || (startColumn === -1)) {
diff --git a/test/spaces_inside_codespan_elements.md b/test/spaces_inside_codespan_elements.md
index f90e12dd..2412a9d9 100644
--- a/test/spaces_inside_codespan_elements.md
+++ b/test/spaces_inside_codespan_elements.md
@@ -67,3 +67,31 @@ text and ``\`code with ignored escaped \` backticks``
 ``multiple trailing spaces not allowed `  `` text `code` {MD038}
 
 `` ` leading and trailing space allowed for backtick ` `` text `code`
+
+Text [link](https://example.com/link`link) text `code`.
+
+Text [link](https://example.com/link```link) text ```code```.
+
+Text [link](https://example.com/link`link`link`link) text `code`.
+
+Text [link](https://example.com/link "title`title") text `code`.
+
+Text [link](#link`link) text `code`.
+
+Text [link] (#link`link) text `code`. {MD038}
+
+Text [link[link](#link`link) text `code`.
+
+Text [link(link](#link`link) text `code`.
+
+Text [link)link](#link`link) text `code`.
+
+Text [link](#link[link`link) text `code`.
+
+Text [link](#link]link`link) text `code`.
+
+Text [link](#link(link`link) text `code`. {MD038}
+
+Text [`link`](xref:custom.link`1) text `code`.
+
+Text ``code [link](#link`link) code`` text `code`.