corpus/round-trip/combinations/directive-link-colon.json

@@ -0,0 +1,107 @@
+{
+  "content": [
+    {
+      "content": [
+        {
+          "marks": [
+            {
+              "type": "underline"
+            },
+            {
+              "attrs": {
+                "href": ":a{"
+              },
+              "type": "link"
+            }
+          ],
+          "text": "x",
+          "type": "text"
+        }
+      ],
+      "type": "paragraph"
+    },
+    {
+      "content": [
+        {
+          "marks": [
+            {
+              "type": "underline"
+            },
+            {
+              "attrs": {
+                "href": "y",
+                "title": ":a{"
+              },
+              "type": "link"
+            }
+          ],
+          "text": "x",
+          "type": "text"
+        }
+      ],
+      "type": "paragraph"
+    },
+    {
+      "content": [
+        {
+          "marks": [
+            {
+              "type": "underline"
+            },
+            {
+              "attrs": {
+                "href": ":a[]{"
+              },
+              "type": "link"
+            }
+          ],
+          "text": "x",
+          "type": "text"
+        }
+      ],
+      "type": "paragraph"
+    },
+    {
+      "content": [
+        {
+          "marks": [
+            {
+              "type": "underline"
+            },
+            {
+              "attrs": {
+                "href": "https://example.com/?q=:emoji{"
+              },
+              "type": "link"
+            }
+          ],
+          "text": "x",
+          "type": "text"
+        }
+      ],
+      "type": "paragraph"
+    },
+    {
+      "content": [
+        {
+          "marks": [
+            {
+              "type": "underline"
+            },
+            {
+              "attrs": {
+                "href": "ab:c{"
+              },
+              "type": "link"
+            }
+          ],
+          "text": "ab:c{",
+          "type": "text"
+        }
+      ],
+      "type": "paragraph"
+    }
+  ],
+  "type": "doc",
+  "version": 1
+}

corpus/round-trip/combinations/directive-link-colon.md

@@ -0,0 +1,9 @@
+:underline[[x](\:a{)]
+
+:underline[[x](y "\:a{")]
+
+:underline[[x](\:a[]{)]
+
+:underline[[x](https://example.com/?q=\:emoji{)]
+
+:underline[[ab\:c{](ab\:c{)]

spec/flavour.md

@@ -48,8 +48,8 @@ normalizes to it through the round-trip.
   title; title in double quotes. A backslash escapes a parenthesis the destination leaves
   unbalanced, and a quote inside the title; a balanced pair stays bare. `<url>` autolink form only
   when the text equals the destination and the destination is a valid CommonMark autolink
-  (absolute URI) — inside an inline directive's `[content]`, one holding no backtick and no
-  unbalanced bracket.
+  (absolute URI) — inside an inline directive's `[content]`, one holding no backtick, no
+  unbalanced bracket and no inline directive opener.
 - Paragraphs on one line — no soft wrapping; a soft line break in input becomes a single space.
 - Entity references in input decode to their characters; output backslash-escapes only where text
   would otherwise parse as syntax, scanning the assembled line rather than each text node: escape
@@ -132,10 +132,10 @@ each a named error naming the spelling to write instead.
 
 **Escaping**: the emitter backslash-escapes whatever literal text would otherwise parse as
 directive syntax — the leading `:` of a would-be directive, `]` inside content, a bracket a link's
-destination and title inside content leave unbalanced and a backtick there that would open a code
-span, a `{` right after a directive's closing `]`, which would otherwise be read as the attributes
-it has none of; outside code spans and code blocks, a backslash before `:` in input yields a
-literal colon.
+destination and title inside content leave unbalanced, a backtick there that would open a code span
+and a `:` there that would open an inline directive, a `{` right after a directive's closing `]`,
+which would otherwise be read as the attributes it has none of; outside code spans and code blocks,
+a backslash before `:` in input yields a literal colon.
 
 **Malformed directives are error results**, named: an unclosed container at end of input, a body
 fence line of the container's length or longer, a bare colon-run line outside any container or

src/markdown/directive-syntax.ts

@@ -56,6 +56,11 @@ export function attributeValue(text: string, kind: AttributeKind): AttributeRead
   return overNested(parsed) ? { refusal: 'nesting' } : { value: { kind, value: parsed } }
 }
 
+export function holdsInlineDirectiveOpener(text: string): boolean {
+  for (let index = text.indexOf(':'); index !== -1; index = text.indexOf(':', index + 1)) if (opensInlineDirective(text, index)) return true
+  return false
+}
+
 export function isBareToken(text: string): boolean {
   return bareToken.test(text)
 }

src/markdown/emit/inline-line.ts

@@ -6,13 +6,13 @@ import { claimsLine, holdsNullCharacter, isAutolink } from '../commonmark-gramma
 import { escapeUnbalanced, spellDestination, spellLinkTarget } from '../link-syntax.ts'
 import { failure, faulted, success, type ConvertErrorPath, type Result } from '../../result.ts'
 import { holdsEntityReference } from '../entity-references.ts'
+import { holdsInlineDirectiveOpener, slotLineEndingFault, spellLeafDirective } from '../directive-syntax.ts'
 import { inlineDirective } from '../../adf/inline-directives.ts'
 import { largestNesting } from '../../nesting.ts'
 import { longestBacktickRun } from '../backtick-runs.ts'
 import { markSpelling, spellMarkAttributes } from '../mark-spellings.ts'
 import { nodeAttrs, nodeContent, nodeMarks } from '../../adf/document.ts'
 import { sameMark } from '../../adf/editor-normal.ts'
-import { slotLineEndingFault, spellLeafDirective } from '../directive-syntax.ts'
 import { spellInlineNodeAttributes } from './inline-directive-spelling.ts'
 import { spellTextDirective } from '../text-directive.ts'
 
@@ -284,7 +284,7 @@ function emitLink(nodes: readonly AdfNode[], mark: AdfMark, depth: number, range
   if (typeof href !== 'string') return success({ carry: range })
   const node = nodes[0]
   const bare = nodes.length === 1 && node !== undefined && node.type === 'text' && node.text === href && nodeMarks(node).length === depth + 1
-  const autolinkHolds = !context.bracketed || (!href.includes('`') && escapeUnbalanced(href, '[', ']') === href)
+  const autolinkHolds = !context.bracketed || (!href.includes('`') && !holdsInlineDirectiveOpener(href) && escapeUnbalanced(href, '[', ']') === href)
   if (bare && autolinkHolds && title === undefined && isAutolink(href) && !holdsEntityReference(href)) return success({ segments: [syntax(`<${href}>`)] })
   const target = spellLinkTarget(href, typeof title === 'string' ? title : undefined, path)
   if (!target.ok) return target

src/markdown/emit/line-escaping.ts

@@ -81,7 +81,8 @@ function escape(segments: readonly InlineSegment[], container: LineContainer): A
         (claimsLineStart(line, index, container) ||
           mergesWithSyntax(scan, escapings, index) ||
           opensConstruct(scan, linkClose, index, escaping === 'bracketed', container, escaped))) ||
-      (escaping === 'bracketed-link-target' && scan.charAt(index) === '`' && opensCodeSpan(scan, index, escaped))
+      (escaping === 'bracketed-link-target' &&
+        ((scan.charAt(index) === '`' && opensCodeSpan(scan, index, escaped)) || (scan.charAt(index) === ':' && opensInlineDirective(scan, index))))
     ) {
       output += '\\'
       escaped.add(index)