fix clippy

Author: alanpoon

src/shared/image_viewer.rs

@@ -288,8 +288,10 @@ live_design! {
 }
 
 /// Actions emitted by the `ImageViewer` widget.
-#[derive(Debug)]
+#[derive(Clone, Debug, DefaultNone)]
 pub enum ImageViewerAction {
+    /// No action.
+    None,
     /// Display the ImageViewer widget based on the LoadState.
     Show(LoadState),
     /// Close the ImageViewer widget.
@@ -443,30 +445,26 @@ impl Widget for ImageViewer {
         if let Event::Signal = event {
             let mut to_remove = false;
             if let Some((_background_task_id, receiver)) = &mut self.receiver {
-                match receiver.try_recv() {
-                    Ok(image_buffer_res) => {
-                        match image_buffer_res {
-                            Ok(image_buffer) => {
-                                let rotated_image = self.view.rotated_image(ids!(rotated_image));
-                                let texture = image_buffer.into_new_texture(cx);
-                                rotated_image.set_texture(cx, Some(texture));
-                                to_remove = true;
-                                cx.action(ImageViewerAction::Show(LoadState::FinishedBackgroundDecoding));
-                            
-                            }
-                            Err(error) => {
-                                let error = match error {
-                                    ImageError::JpgDecode(_) | ImageError::PngDecode(_) => ImageViewerError::UnsupportedFormat,
-                                    ImageError::EmptyData => ImageViewerError::BadData,
-                                    ImageError::PathNotFound(_) => ImageViewerError::NotFound,
-                                    ImageError::UnsupportedFormat => ImageViewerError::UnsupportedFormat,
-                                    _ => ImageViewerError::BadData,
-                                };
-                                cx.action(ImageViewerAction::Show(LoadState::Error(error)));
-                            }
+                if let Ok(image_buffer) = receiver.try_recv() {
+                    match image_buffer {
+                        Ok(image_buffer) => {
+                            let rotated_image = self.view.rotated_image(ids!(rotated_image));
+                            let texture = image_buffer.into_new_texture(cx);
+                            rotated_image.set_texture(cx, Some(texture));
+                            to_remove = true;
+                            cx.action(ImageViewerAction::Show(LoadState::FinishedBackgroundDecoding));
+                        }
+                        Err(error) => {
+                            let error = match error {
+                                ImageError::JpgDecode(_) | ImageError::PngDecode(_) => ImageViewerError::UnsupportedFormat,
+                                ImageError::EmptyData => ImageViewerError::BadData,
+                                ImageError::PathNotFound(_) => ImageViewerError::NotFound,
+                                ImageError::UnsupportedFormat => ImageViewerError::UnsupportedFormat,
+                                _ => ImageViewerError::BadData,
+                            };
+                            cx.action(ImageViewerAction::Show(LoadState::Error(error)));
                         }
                     }
-                    Err(_) => {}
                 }
             }
             if to_remove {
@@ -540,7 +538,7 @@ impl ImageViewer {
         // Clear the rotated image texture with a white background
         if let Ok(image_buffer) = ImageBuffer::new(&[255], 1, 1) {
             let texture = image_buffer.into_new_texture(cx);
-            let _ = self.view.rotated_image(ids!(rotated_image)).set_texture(cx, Some(texture));
+            self.view.rotated_image(ids!(rotated_image)).set_texture(cx, Some(texture));
             self.view.rotated_image(ids!(rotated_image)).redraw(cx);
         }
         self.animator_cut(cx, ids!(mode.upright));
@@ -727,7 +725,7 @@ impl ImageViewerRef {
 }
 
 /// Represents the possible states of an image load operation.
-#[derive(Debug,)]
+#[derive(Debug, Clone)]
 pub enum LoadState {
     /// The image is currently being loaded with its loading image texture and its image size.
     /// This texture is usually the image texture that's being selected.