From c96634e00b409aeb203f6234e9a319ed8d05a9e2 Mon Sep 17 00:00:00 2001
From: eternal-flame-AD <yume@yumechi.jp>
Date: Wed, 12 Nov 2025 17:55:42 -0600
Subject: [PATCH] enhance: support text escaping (#152)

Signed-off-by: eternal-flame-AD <yume@yumechi.jp>
---
 src/internal/parser.ts |  8 +++++++-
 test/parser.ts         | 26 ++++++++++++++++++++++++--
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/src/internal/parser.ts b/src/internal/parser.ts
index 2eaf89c..286b1ed 100644
--- a/src/internal/parser.ts
+++ b/src/internal/parser.ts
@@ -16,6 +16,7 @@ type Args = Record<string, string | true>;
 const space = P.regexp(/[\u0020\u3000\t]/);
 const alphaAndNum = P.regexp(/[a-z0-9]/i);
 const newLine = P.alt([P.crlf, P.cr, P.lf]);
+const asciiPunctuation = P.regexp(/[!#$%&'()*+,-./:;<=>?@\[\\\]^_`{|}~]/);
 
 function seqOrText<Parsers extends P.Parser<unknown>[]>(...parsers: Parsers): P.Parser<SeqParseResult<Parsers> | string> {
 	return new P.Parser<SeqParseResult<Parsers> | string>((input, index, state) => {
@@ -794,5 +795,10 @@ export const language = P.createLanguage<TypeTable>({
 		});
 	},
 
-	text: () => P.char,
+	text: () => {
+		return P.alt([
+			P.seq(P.str('\\'), asciiPunctuation).select(1),
+			P.char,
+		]);
+	},
 });
diff --git a/test/parser.ts b/test/parser.ts
index 0f7575a..56c9790 100644
--- a/test/parser.ts
+++ b/test/parser.ts
@@ -303,14 +303,14 @@ hoge`;
 		test('行末以外に閉じタグがある場合はマッチしない', () => {
 			const input = '\\[aaa\\]after';
 			const output = [
-				TEXT('\\[aaa\\]after')
+				TEXT('[aaa]after')
 			];
 			assert.deepStrictEqual(mfm.parse(input), output);
 		});
 		test('行頭以外に開始タグがある場合はマッチしない', () => {
 			const input = 'before\\[aaa\\]';
 			const output = [
-				TEXT('before\\[aaa\\]')
+				TEXT('before[aaa]')
 			];
 			assert.deepStrictEqual(mfm.parse(input), output);
 		});
@@ -1086,6 +1086,28 @@ hoge`;
 			assert.deepStrictEqual(mfm.parse(input), output);
 		});
 
+		test('with escaped text', () => {
+			const input = 'Ai said: ["Misskey.io \\[is\\] the official instance"](https://xn--931a.moe/).';
+			const output = [
+				TEXT('Ai said: '),
+				LINK(false, 'https://xn--931a.moe/', [
+					TEXT('"Misskey.io [is] the official instance"')
+				]),
+				TEXT('.')
+			];
+			assert.deepStrictEqual(mfm.parse(input), output);
+		});
+
+		test('with double escaped text', () => {
+			const input = 'Ai said: ["Misskey.io \\\\[is\\\\] the official instance"](https://xn--931a.moe/).';
+			const output = [
+				TEXT('Ai said: '),
+				LINK(false, 'https://xn--931a.moe/', [
+					TEXT('"Misskey.io \\[is\\] the official instance"')
+				]),
+			];
+		});
+
 		test('with angle brackets url', () => {
 			const input = '[official instance](<https://misskey.io/@ai>).';
 			const output = [