fix arabic and rtl support

Author: iskepr

lib/src/code/reg_exp.dart

@@ -1,3 +1,3 @@
 class RegExps {
-  static final wordSplit = RegExp('[^_a-zA-Z0-9]+');
+  static final wordSplit = RegExp(r'[^_a-zA-Z0-9\u0600-\u06FF]+');
 }

lib/src/code_field/code_field.dart

@@ -173,6 +173,7 @@ class CodeField extends StatefulWidget {
   final Color? background;
   final EdgeInsets padding;
   final Decoration? decoration;
+  final TextDirection textDirection;
   final TextSelectionThemeData? textSelectionTheme;
   final FocusNode? focusNode;
 
@@ -196,6 +197,7 @@ class CodeField extends StatefulWidget {
     this.smartQuotesType = SmartQuotesType.disabled,
     this.padding = EdgeInsets.zero,
     GutterStyle? gutterStyle,
+    this.textDirection = TextDirection.ltr,
     this.enabled,
     this.readOnly = false,
     this.cursorColor,
@@ -434,6 +436,7 @@ class _CodeFieldState extends State<CodeField> {
       maxLines: widget.maxLines,
       expands: widget.expands,
       scrollController: _codeScroll,
+      textDirection: widget.textDirection,
       decoration: const InputDecoration(
         isCollapsed: true,
         contentPadding: EdgeInsets.symmetric(vertical: 16),
@@ -464,17 +467,19 @@ class _CodeFieldState extends State<CodeField> {
     return FocusableActionDetector(
       actions: widget.controller.actions,
       shortcuts: _shortcuts,
-      child: Container(
-        decoration: widget.decoration,
-        color: _backgroundCol,
-        key: _codeFieldKey,
-        padding: const EdgeInsets.only(left: 8),
-        child: Row(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            if (widget.gutterStyle.showGutter) _buildGutter(),
-            Expanded(key: _editorKey, child: editingField),
-          ],
+      child: Directionality(
+        textDirection: widget.textDirection,
+        child: Container(
+          decoration: widget.decoration,
+          color: _backgroundCol,
+          key: _codeFieldKey,
+          child: Row(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              if (widget.gutterStyle.showGutter) _buildGutter(),
+              Expanded(key: _editorKey, child: editingField),
+            ],
+          ),
         ),
       ),
     );