feat(ui): disable copy to clipboard when layer is empty

invokeai/frontend/web/src/features/controlLayers/components/common/CanvasEntityMenuItemsCopyToClipboard.tsx

@@ -2,6 +2,7 @@ import { MenuItem } from '@invoke-ai/ui-library';
 import { useEntityAdapterSafe } from 'features/controlLayers/contexts/EntityAdapterContext';
 import { useEntityIdentifierContext } from 'features/controlLayers/contexts/EntityIdentifierContext';
 import { useCopyLayerToClipboard } from 'features/controlLayers/hooks/useCopyLayerToClipboard';
+import { useEntityIsEmpty } from 'features/controlLayers/hooks/useEntityIsEmpty';
 import { useIsEntityInteractable } from 'features/controlLayers/hooks/useEntityIsInteractable';
 import { memo, useCallback } from 'react';
 import { useTranslation } from 'react-i18next';
@@ -12,6 +13,7 @@ export const CanvasEntityMenuItemsCopyToClipboard = memo(() => {
   const entityIdentifier = useEntityIdentifierContext();
   const adapter = useEntityAdapterSafe(entityIdentifier);
   const isInteractable = useIsEntityInteractable(entityIdentifier);
+  const isEmpty = useEntityIsEmpty(entityIdentifier);
   const copyLayerToClipboard = useCopyLayerToClipboard();
 
   const onClick = useCallback(() => {
@@ -19,7 +21,7 @@ export const CanvasEntityMenuItemsCopyToClipboard = memo(() => {
   }, [copyLayerToClipboard, adapter]);
 
   return (
-    <MenuItem onClick={onClick} icon={<PiCopyBold />} isDisabled={!isInteractable}>
+    <MenuItem onClick={onClick} icon={<PiCopyBold />} isDisabled={!isInteractable || isEmpty}>
       {t('common.clipboard')}
     </MenuItem>
   );

invokeai/frontend/web/src/features/controlLayers/hooks/useEntityIsEmpty.ts

@@ -0,0 +1,11 @@
+import { useAppSelector } from 'app/store/storeHooks';
+import { buildSelectHasObjects } from 'features/controlLayers/store/selectors';
+import type { CanvasEntityIdentifier } from 'features/controlLayers/store/types';
+import { useMemo } from 'react';
+
+export const useEntityIsEmpty = (entityIdentifier: CanvasEntityIdentifier) => {
+  const selectHasObjects = useMemo(() => buildSelectHasObjects(entityIdentifier), [entityIdentifier]);
+  const hasObjects = useAppSelector(selectHasObjects);
+
+  return !hasObjects;
+};

invokeai/frontend/web/src/features/controlLayers/store/selectors.ts

@@ -349,6 +349,27 @@ export const buildSelectIsSelected = (entityIdentifier: CanvasEntityIdentifier)
   );
 };
 
+/**
+ * Builds a selector that selects if the entity is empty.
+ *
+ * Reference images are considered empty if the IP adapter is empty.
+ *
+ * Other entities are considered empty if they have no objects.
+ */
+export const buildSelectHasObjects = (entityIdentifier: CanvasEntityIdentifier) => {
+  return createSelector(selectCanvasSlice, (canvas) => {
+    const entity = selectEntity(canvas, entityIdentifier);
+
+    if (!entity) {
+      return false;
+    }
+    if (entity.type === 'reference_image') {
+      return entity.ipAdapter.image !== null;
+    }
+    return entity.objects.length > 0;
+  });
+};
+
 export const selectWidth = createSelector(selectCanvasSlice, (canvas) => canvas.bbox.rect.width);
 export const selectHeight = createSelector(selectCanvasSlice, (canvas) => canvas.bbox.rect.height);
 export const selectAspectRatioID = createSelector(selectCanvasSlice, (canvas) => canvas.bbox.aspectRatio.id);