fix(editor/treesitter): avoid unnecessary transition from Java to JNI

Author: itsaky

editor-treesitter/src/main/java/io/github/rosemoe/sora/editor/ts/TsScopedVariables.kt

@@ -111,9 +111,7 @@ class TsScopedVariables(tree: TSTree, text: UTF16String, val spec: TsLanguageSpe
             scopeStack.push(newScope)
           } else if (pattern in spec.localsDefinitionIndices) {
             val scope = scopeStack.peek()
-            val utf16Name = text.subseqChars(startIndex, endIndex)
-            val name = utf16Name.toString()
-            utf16Name.close()
+            val name = text.substringChars(startIndex, endIndex)
             val scopedVar = ScopedVariable(
               name,
               if (scope.forMembers) scope.startIndex else startIndex,

editor-treesitter/src/main/java/io/github/rosemoe/sora/editor/ts/predicate/builtin/Utils.kt

@@ -54,7 +54,7 @@ fun getCaptureContent(
 ) = match.captures.filter { tsQuery.getCaptureNameForId(it.index) == captureName }
   .map { capture ->
     when (text) {
-      is UTF16String -> text.subseqBytes(capture.node.startByte, capture.node.endByte).use(UTF16String::toString)
+      is UTF16String -> text.substringBytes(capture.node.startByte, capture.node.endByte)
       is Content -> text.substring(capture.node.startByte shr 1, capture.node.endByte shr 1)
       else -> text.substring(capture.node.startByte shr 1, capture.node.endByte shr 1)
     }