understand other URL schemes too (#73)

src/internal/parser.pegjs

@@ -389,6 +389,11 @@ altUrlFormat
 {
 	return text();
 }
+// URL scheme as defined in https://url.spec.whatwg.org/#url-scheme-string
+	/ [a-zA-Z] [-a-zA-Z0-9+.]* ":" (!(">" / _) CHAR)+
+{
+	return text();
+}
 
 // inline: link
 
@@ -412,6 +417,11 @@ linkLabelPart
 
 linkUrl
 	= url { return text(); }
+// URL scheme as defined in https://url.spec.whatwg.org/#url-scheme-string
+	/ [a-zA-Z] [-a-zA-Z0-9+.]* ":" (!(")" / _) CHAR)+
+{
+	return text();
+}
 
 // inline: fn
 

test/parser.ts

@@ -882,6 +882,22 @@ hoge`;
 			];
 			assert.deepStrictEqual(mfm.parse(input), output);
 		});
+
+		it('do not match other schemes in url withouth angle brackets', () => {
+			const input = 'oops:url';
+			const output = [
+				TEXT('oops:url'),
+			];
+			assert.deepStrictEqual(mfm.parse(input), output);
+		});
+
+		it('match other schemes in url with angle brackets', () => {
+			const input = '<gemini://example.com>';
+			const output = [
+				N_URL('gemini://example.com', true),
+			];
+			assert.deepStrictEqual(mfm.parse(input), output);
+		});
 	});
 
 	describe('link', () => {
@@ -962,6 +978,16 @@ hoge`;
 			];
 			assert.deepStrictEqual(mfm.parse(input), output);
 		});
+
+		it('match other schemes without angle brackets', () => {
+			const input = '[send email](mailto:[email protected]?subject=test)';
+			const output = [
+				LINK(false, 'mailto:[email protected]?subject=test', [
+					TEXT('send email')
+				]),
+			];
+			assert.deepStrictEqual(mfm.parse(input), output);
+		});
 	});
 
 	describe('fn v1', () => {