1 files changed, 38 insertions, 0 deletions
diff --git a/packages/markdown-it-14.1.0/lib/rules_inline/fragments_join.mjs b/packages/markdown-it-14.1.0/lib/rules_inline/fragments_join.mjs
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+++ b/packages/markdown-it-14.1.0/lib/rules_inline/fragments_join.mjs
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+// Clean up tokens after emphasis and strikethrough postprocessing:
+// merge adjacent text nodes into one and re-calculate all token levels
+//
+// This is necessary because initially emphasis delimiter markers (*, _, ~)
+// are treated as their own separate text tokens. Then emphasis rule either
+// leaves them as text (needed to merge with adjacent text) or turns them
+// into opening/closing tags (which messes up levels inside).
+//
+
+export default function fragments_join (state) {
+  let curr, last
+  let level = 0
+  const tokens = state.tokens
+  const max = state.tokens.length
+
+  for (curr = last = 0; curr < max; curr++) {
+    // re-calculate levels after emphasis/strikethrough turns some text nodes
+    // into opening/closing tags
+    if (tokens[curr].nesting < 0) level-- // closing tag
+    tokens[curr].level = level
+    if (tokens[curr].nesting > 0) level++ // opening tag
+
+    if (tokens[curr].type === 'text' &&
+        curr + 1 < max &&
+        tokens[curr + 1].type === 'text') {
+      // collapse two adjacent text nodes
+      tokens[curr + 1].content = tokens[curr].content + tokens[curr + 1].content
+    } else {
+      if (curr !== last) { tokens[last] = tokens[curr] }
+
+      last++
+    }
+  }
+
+  if (curr !== last) {
+    tokens.length = last
+  }
+}