[SuperEditor][Android] Show expanded handles when expanding the selec…

…tion (Resolves superlistapp#1937) (superlistapp#2014)

super_editor/lib/src/default_editor/document_gestures_touch_android.dart

@@ -1345,6 +1345,7 @@ class SuperEditorAndroidControlsOverlayManagerState extends State<SuperEditorAnd
     _controlsController = SuperEditorAndroidControlsScope.rootOf(context);
     // TODO: Replace Cupertino aligner with a generic aligner because this code runs on Android.
     _toolbarAligner = CupertinoPopoverToolbarAligner();
+    widget.selection.addListener(_onSelectionChange);
   }
 
   @override
@@ -1383,7 +1384,12 @@ class SuperEditorAndroidControlsOverlayManagerState extends State<SuperEditorAnd
   bool get wantsToDisplayMagnifier => _controlsController!.shouldShowMagnifier.value;
 
   void _onSelectionChange() {
-    if (widget.selection.value?.isCollapsed == true &&
+    final selection = widget.selection.value;
+    if (selection == null) {
+      return;
+    }
+
+    if (selection.isCollapsed &&
         _controlsController!.shouldShowExpandedHandles.value == true &&
         _dragHandleType == null) {
       // The selection is collapsed, but the expanded handles are visible and the user isn't dragging a handle.
@@ -1397,6 +1403,17 @@ class SuperEditorAndroidControlsOverlayManagerState extends State<SuperEditorAnd
         ..hideToolbar()
         ..blinkCaret();
     }
+
+    if (!selection.isCollapsed && _controlsController!.shouldShowCollapsedHandle.value == true) {
+      // The selection is expanded, but the collapsed handle is visible. This can happen when the
+      // selection is collapsed and the user taps the "Select All" button. There isn't any situation
+      // where the collapsed handle should be visible when the selection is expanded. Hide the collapsed
+      // handle and show the expanded handles.
+      _controlsController!
+        ..hideCollapsedHandle()
+        ..showExpandedHandles()
+        ..hideMagnifier();
+    }
   }
 
   void _toggleToolbarOnCollapsedHandleTap() {

super_editor/test/super_editor/mobile/super_editor_android_overlay_controls_test.dart

@@ -214,6 +214,26 @@ void main() {
       expect(SuperEditorInspector.isCaretVisible(), isTrue);
     });
 
+    testWidgetsOnAndroid("shows expanded handles when expanding the selection", (tester) async {
+      final context = await _pumpSingleParagraphApp(tester);
+
+      // Place the caret at the beginning of the paragraph.
+      await tester.placeCaretInParagraph("1", 0);
+      await tester.pump();
+
+      // Ensure the collapsed handle is visible and the expanded handles aren't visible.
+      expect(SuperEditorInspector.findMobileCaretDragHandle(), findsOneWidget);
+      expect(SuperEditorInspector.findMobileExpandedDragHandles(), findsNothing);
+
+      // Select all of the text.
+      context.findEditContext().commonOps.selectAll();
+      await tester.pump();
+
+      // Ensure the handles are visible and the collapsed handle isn't visible.
+      expect(SuperEditorInspector.findMobileExpandedDragHandles(), findsNWidgets(2));
+      expect(SuperEditorInspector.findMobileCaretDragHandle(), findsNothing);
+    });
+
     testWidgetsOnAndroid("hides expanded handles and toolbar when deleting an expanded selection", (tester) async {
       // Configure BlinkController to animate, otherwise it won't blink. We want to make sure
       // the caret blinks after deleting the content.
@@ -545,8 +565,8 @@ void main() {
   });
 }
 
-Future<void> _pumpSingleParagraphApp(WidgetTester tester) async {
-  await tester
+Future<TestDocumentContext> _pumpSingleParagraphApp(WidgetTester tester) async {
+  return await tester
       .createDocument()
       // Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor...
       .withSingleParagraph()