fix(autoformatting): prevent autoformatting when the first underscore…

… is preceded by a non-whitespace character (#262)
StackExchange · Jan 30, 2024 · 5e45ac2 · 5e45ac2
1 parent 3b55b95
commit 5e45ac2
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Showing 2 changed files with 4 additions and 2 deletions.
diff --git a/src/rich-text/inputrules.ts b/src/rich-text/inputrules.ts
@@ -15,9 +15,9 @@ const strongRegexAsterisks = /\*\*(\S(?:|.*?\S))\*\*$/;
 // matches: *some text*, but not **text* or * text *
 export const emphasisRegexAsterisk = /\*([^*\s]([^*])*[^*\s]|[^*\s])\*$/;
 // matches: __some text__, but not __ text __
-const strongRegexUnderscores = /__(\S(?:|.*?\S))__$/;
+const strongRegexUnderscores = /(?<!\S)__(\S(?:|.*?\S))__$/;
 // matches: _some text_, but not __text_ or _ text _
-const emphasisRegexUnderscore = /_([^_\s]([^_])*[^_\s]|[^_\s])_$/;
+const emphasisRegexUnderscore = /(?<!\S)_([^_\s]([^_])*[^_\s]|[^_\s])_$/;
 // matches: [ *any* thing ]( any thing )
 const linkRegex = /\[(.+)\]\((.+)\)$/;
 

diff --git a/test/rich-text/inputrules.test.ts b/test/rich-text/inputrules.test.ts
@@ -99,6 +99,7 @@ describe("mark input rules", () => {
         ["__not a match_", false],
         ["_ no-match_", false],
         ["_no-match _", false],
+        ["text_no-match_", false],
     ];
     // eslint-disable-next-line jest/expect-expect
     it.each(emphasisUnderlineTests)(
@@ -123,6 +124,7 @@ describe("mark input rules", () => {
         ["__should match__", true],
         ["__ no-match__", false],
         ["__no-match __", false],
+        ["text__no-match__", false],
     ];
     // eslint-disable-next-line jest/expect-expect
     it.each(boldUnderlineTests)(