fix undo

lib/src/views/camera/image_editor/layers/emoji_layer.dart

@@ -68,6 +68,9 @@ class _EmojiLayerState extends State<EmojiLayer> {
                 }
                 if (deleteLayer) {
                   widget.layerData.isDeleted = true;
+                  if (widget.onUpdate != null) {
+                    widget.onUpdate!();
+                  }
                 }
               });
             },

lib/src/views/camera/image_editor/layers/text_layer.dart

@@ -42,6 +42,7 @@ class _TextViewState extends State<TextLayer> {
               MediaQuery.of(context).size.height / 2 -
                   150 +
                   (widget.layerData.textLayersBefore * 40));
+          textController.text = widget.layerData.text;
         });
       });
     }
@@ -135,6 +136,9 @@ class _TextViewState extends State<TextLayer> {
                 textController.text = "";
               }
               elementIsScaled = false;
+              if (widget.onUpdate != null) {
+                widget.onUpdate!();
+              }
               setState(() {});
             },
             onTap: (context

lib/src/views/camera/share_image_editor_view.dart

@@ -283,11 +283,13 @@ class _ShareImageEditorView extends State<ShareImageEditorView> {
       ActionButton(
         FontAwesomeIcons.rotateLeft,
         tooltipText: context.lang.undo,
-        disable: layers.where((x) => x.isDeleted).length <= 2 &&
+        disable: layers.where((x) => !x.isDeleted).length <= 2,
-            removedLayers.isEmpty,
         onPressed: () {
           if (removedLayers.isNotEmpty) {
-            layers.add(removedLayers.removeLast());
+            var lastLayer = removedLayers.removeLast();
+            lastLayer.isDeleted = false;
+            lastLayer.isEditing = false;
+            layers.add(lastLayer);
             setState(() {});
             return;
           }
@@ -496,7 +498,11 @@ class _ShareImageEditorView extends State<ShareImageEditorView> {
                         onUpdate: () {
                           for (final layer in layers) {
                             layer.isEditing = false;
+                            if (layer.isDeleted) {
+                              removedLayers.add(layer);
+                            }
                           }
+                          layers = layers.where((x) => !x.isDeleted).toList();
                           setState(() {});
                         },
                       ),