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Intended for matching brackets.\r\n *\r\n * Without rainbow brackets, this extension can be added dynamically with no downsides.\r\n *\r\n * @param rainbowBrackets Whether to add extra classes to brackets for styling. Defaults\r\n * to `true`. When enabled, adding the extension dynamically will force a rerender to add\r\n * these extra classes.\r\n * @param pairs Which characters to match together. The opening character must be followed\r\n * by the corresponding closing character. Defaults to `\"()[]{}\"`.\r\n */\r\nexport const matchBrackets = (rainbowBrackets = true, pairs = \"()[]{}\") =\u003e {\r\n\tlet bracketIndex: number\r\n\tlet sp: number\r\n\tconst stack: [number, number][] = []\r\n\tconst self: BracketMatcher = editor =\u003e {\r\n\t\teditor.extensions.matchBrackets = self\r\n\t\teditor.on(\"tokenize\", matchBrackets)\r\n\t\tif (rainbowBrackets \u0026\u0026 editor.tokens[0]) editor.update()\r\n\t\telse matchBrackets(editor.tokens)\r\n\t}\r\n\t// @ts-expect-error\r\n\tconst brackets: Bracket[] = (self.brackets = [])\r\n\t// @ts-expect-error\r\n\tconst pairMap: number[] = (self.pairs = [])\r\n\tconst matchBrackets = (tokens: TokenStream) =\u003e {\r\n\t\tpairMap.length = brackets.length = sp = bracketIndex = 0\r\n\t\tmatchRecursive(tokens, 0)\r\n\r\n\t\tif (rainbowBrackets) {\r\n\t\t\tfor (let i = 0, bracket: Bracket; (bracket = brackets[i]); ) {\r\n\t\t\t\tlet alias = bracket[0].alias\r\n\r\n\t\t\t\tbracket[0].alias =\r\n\t\t\t\t\t(alias ? alias + \" \" : \"\") +\r\n\t\t\t\t\t`bracket-${i++ in pairMap ? \"level-\" + (bracket[3] % 12) : \"error\"}`\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n\tconst matchRecursive = (tokens: TokenStream, position: number) =\u003e {\r\n\t\tlet token: string | Token\r\n\t\tlet i = 0\r\n\t\tfor (; (token = tokens[i++]); ) {\r\n\t\t\tlet length = token.length\r\n\t\t\tif (typeof token != \"string\") {\r\n\t\t\t\tlet content = token.content\r\n\r\n\t\t\t\tif (Array.isArray(content)) {\r\n\t\t\t\t\tmatchRecursive(content, position)\r\n\t\t\t\t} else if ((token.alias || token.type) == \"punctuation\") {\r\n\t\t\t\t\tlet bracketType = testBracket(content, pairs, length - 1)\r\n\t\t\t\t\tlet isOpening = bracketType % 2\r\n\t\t\t\t\tif (bracketType) {\r\n\t\t\t\t\t\tbrackets[bracketIndex] = [token, position, position + length, sp, content, !!isOpening]\r\n\r\n\t\t\t\t\t\tif (isOpening) stack[sp++] = [bracketIndex, bracketType + 1]\r\n\t\t\t\t\t\telse {\r\n\t\t\t\t\t\t\tfor (let i = sp, entry: [number, number]; (entry = stack[--i]); ) {\r\n\t\t\t\t\t\t\t\tif (bracketType == entry[1]) {\r\n\t\t\t\t\t\t\t\t\tpairMap[(pairMap[bracketIndex] = entry[0])] = bracketIndex\r\n\t\t\t\t\t\t\t\t\tbrackets[bracketIndex][3] = sp = i\r\n\t\t\t\t\t\t\t\t\tbreak\r\n\t\t\t\t\t\t\t\t}\r\n\t\t\t\t\t\t\t}\r\n\t\t\t\t\t\t}\r\n\t\t\t\t\t\tbracketIndex++\r\n\t\t\t\t\t}\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t\tposition += length\r\n\t\t}\r\n\t}\r\n\r\n\treturn self\r\n}\r\n"],"version":3}