From ec1513229c6f0d1c681058129c43fe02604d99d0 Mon Sep 17 00:00:00 2001
From: bLue <tbdblue@gmail.com>
Date: Wed, 27 Mar 2024 17:06:45 +0800
Subject: [PATCH] fix: Adjust math delimiter to fix markdown import/export
 compatibility issue ( #6650)

---
 shared/editor/nodes/Math.ts      | 4 ++--
 shared/editor/nodes/MathBlock.ts | 4 ++--
 shared/editor/rules/math.ts      | 6 +++---
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/shared/editor/nodes/Math.ts b/shared/editor/nodes/Math.ts
index b9183f33a8a5..83c0911e57d6 100644
--- a/shared/editor/nodes/Math.ts
+++ b/shared/editor/nodes/Math.ts
@@ -69,9 +69,9 @@ export default class Math extends Node {
   }
 
   toMarkdown(state: MarkdownSerializerState, node: ProsemirrorNode) {
-    state.write("$$");
+    state.write("$");
     state.text(node.textContent, false);
-    state.write("$$");
+    state.write("$");
   }
 
   parseMarkdown() {
diff --git a/shared/editor/nodes/MathBlock.ts b/shared/editor/nodes/MathBlock.ts
index fe1b618f68b8..3ffbfd5d170e 100644
--- a/shared/editor/nodes/MathBlock.ts
+++ b/shared/editor/nodes/MathBlock.ts
@@ -41,10 +41,10 @@ export default class MathBlock extends Node {
   }
 
   toMarkdown(state: MarkdownSerializerState, node: ProsemirrorNode) {
-    state.write("$$$\n");
+    state.write("$$\n");
     state.text(node.textContent, false);
     state.ensureNewLine();
-    state.write("$$$");
+    state.write("$$");
     state.closeBlock(node);
   }
 
diff --git a/shared/editor/rules/math.ts b/shared/editor/rules/math.ts
index 48717645cf66..f18191d6beb3 100644
--- a/shared/editor/rules/math.ts
+++ b/shared/editor/rules/math.ts
@@ -6,8 +6,8 @@ export const REGEX_INLINE_MATH_DOLLARS = /\$\$(.+)\$\$/;
 
 export const REGEX_BLOCK_MATH_DOLLARS = /\$\$\$\s+$/;
 
-const inlineMathDelimiter = "$$";
-const blockMathDelimiter = "$$$";
+const inlineMathDelimiter = "$";
+const blockMathDelimiter = "$$";
 
 // test if potential opening or closing delimiter
 // assumes that there is a "$" at state.src[pos]
@@ -85,7 +85,7 @@ function mathInline(state: StateInline, silent: boolean): boolean {
     return true;
   }
 
-  // check if we have empty content (ex. $$$$) do not parse
+  // check if we have empty content (ex. $$) do not parse
   if (match - start === 0) {
     if (!silent) {
       state.pending += inlineMathDelimiter + inlineMathDelimiter;