feat(ui): node delete, copy, paste

invokeai/frontend/web/src/features/nodes/components/Flow.tsx

@@ -2,6 +2,7 @@ import { useToken } from '@chakra-ui/react';
 import { useAppDispatch, useAppSelector } from 'app/store/storeHooks';
 import { contextMenusClosed } from 'features/ui/store/uiSlice';
 import { useCallback } from 'react';
+import { useHotkeys } from 'react-hotkeys-hook';
 import {
   Background,
   OnConnect,
@@ -27,6 +28,8 @@ import {
   nodesDeleted,
   selectedEdgesChanged,
   selectedNodesChanged,
+  selectionCopied,
+  selectionPasted,
   viewportChanged,
 } from '../store/nodesSlice';
 import { CustomConnectionLine } from './CustomConnectionLine';
@@ -121,8 +124,17 @@ export const Flow = () => {
     dispatch(contextMenusClosed());
   }, [dispatch]);
 
+  useHotkeys(['Ctrl+c', 'Meta+c'], () => {
+    dispatch(selectionCopied());
+  });
+
+  useHotkeys(['Ctrl+v', 'Meta+v'], () => {
+    dispatch(selectionPasted());
+  });
+
   return (
     <ReactFlow
+      id="workflow-editor"
       defaultViewport={viewport}
       nodeTypes={nodeTypes}
       edgeTypes={edgeTypes}

invokeai/frontend/web/src/features/nodes/hooks/useBuildNodeData.ts

@@ -14,7 +14,7 @@ import {
   OutputFieldValue,
 } from '../types/types';
 import { buildInputFieldValue } from '../util/fieldValueBuilders';
-import { DRAG_HANDLE_CLASSNAME } from '../types/constants';
+import { DRAG_HANDLE_CLASSNAME, NODE_WIDTH } from '../types/constants';
 
 const templatesSelector = createSelector(
   [(state: RootState) => state.nodes],
@@ -34,10 +34,24 @@ export const useBuildNodeData = () => {
     (type: AnyInvocationType | 'current_image' | 'notes') => {
       const nodeId = uuidv4();
 
+      let _x = window.innerWidth / 2;
+      let _y = window.innerHeight / 2;
+
+      // attempt to center the node in the middle of the flow
+      const rect = document
+        .querySelector('#workflow-editor')
+        ?.getBoundingClientRect();
+
+      if (rect) {
+        _x = rect.width / 2 - NODE_WIDTH / 2;
+        _y = rect.height / 2 - NODE_WIDTH / 2;
+      }
+
       const { x, y } = flow.project({
-        x: window.innerWidth / 2.5,
+        x: _x,
-        y: window.innerHeight / 8,
+        y: _y,
       });
+
       if (type === 'current_image') {
         const node: Node<CurrentImageNodeData> = {
           ...SHARED_NODE_PROPERTIES,

invokeai/frontend/web/src/features/nodes/store/nodesPersistDenylist.ts

@@ -11,4 +11,6 @@ export const nodesPersistDenylist: (keyof NodesState)[] = [
   'selectedNodes',
   'selectedEdges',
   'isReady',
+  'nodesToCopy',
+  'edgesToCopy',
 ];

invokeai/frontend/web/src/features/nodes/store/nodesSlice.ts

@@ -25,6 +25,7 @@ import {
   appSocketInvocationError,
   appSocketInvocationStarted,
 } from 'services/events/actions';
+import { v4 as uuidv4 } from 'uuid';
 import { DRAG_HANDLE_CLASSNAME } from '../types/constants';
 import {
   BooleanInputFieldValue,
@@ -52,6 +53,7 @@ import {
   Workflow,
 } from '../types/types';
 import { NodesState } from './types';
+import { findUnoccupiedPosition } from './util/findUnoccupiedPosition';
 
 export const initialNodesState: NodesState = {
   nodes: [],
@@ -83,6 +85,8 @@ export const initialNodesState: NodesState = {
   nodeExecutionStates: {},
   viewport: { x: 0, y: 0, zoom: 1 },
   mouseOverField: null,
+  nodesToCopy: [],
+  edgesToCopy: [],
 };
 
 type FieldValueAction<T extends InputFieldValue> = PayloadAction<{
@@ -124,6 +128,12 @@ const nodesSlice = createSlice({
       >
     ) => {
       const node = action.payload;
+      const position = findUnoccupiedPosition(
+        state.nodes,
+        node.position.x,
+        node.position.y
+      );
+      node.position = position;
       state.nodes.push(node);
 
       if (!isInvocationNode(node)) {
@@ -595,6 +605,85 @@ const nodesSlice = createSlice({
     ) => {
       state.mouseOverField = action.payload;
     },
+    selectionCopied: (state) => {
+      state.nodesToCopy = state.nodes.filter((n) => n.selected).map(cloneDeep);
+      state.edgesToCopy = state.edges.filter((e) => e.selected).map(cloneDeep);
+    },
+    selectionPasted: (state) => {
+      const newNodes = state.nodesToCopy.map(cloneDeep);
+      const oldNodeIds = newNodes.map((n) => n.data.id);
+      const newEdges = state.edgesToCopy
+        .filter(
+          (e) => oldNodeIds.includes(e.source) && oldNodeIds.includes(e.target)
+        )
+        .map(cloneDeep);
+
+      newEdges.forEach((e) => (e.selected = true));
+
+      newNodes.forEach((node) => {
+        const newNodeId = uuidv4();
+        newEdges.forEach((edge) => {
+          if (edge.source === node.data.id) {
+            edge.source = newNodeId;
+            edge.id = edge.id.replace(node.data.id, newNodeId);
+          }
+          if (edge.target === node.data.id) {
+            edge.target = newNodeId;
+            edge.id = edge.id.replace(node.data.id, newNodeId);
+          }
+        });
+        node.selected = true;
+        node.id = newNodeId;
+        node.data.id = newNodeId;
+
+        const position = findUnoccupiedPosition(
+          state.nodes,
+          node.position.x,
+          node.position.y
+        );
+
+        node.position = position;
+      });
+
+      const nodeAdditions: NodeChange[] = newNodes.map((n) => ({
+        item: n,
+        type: 'add',
+      }));
+      const nodeSelectionChanges: NodeChange[] = state.nodes.map((n) => ({
+        id: n.data.id,
+        type: 'select',
+        selected: false,
+      }));
+
+      const edgeAdditions: EdgeChange[] = newEdges.map((e) => ({
+        item: e,
+        type: 'add',
+      }));
+      const edgeSelectionChanges: EdgeChange[] = state.edges.map((e) => ({
+        id: e.id,
+        type: 'select',
+        selected: false,
+      }));
+
+      state.nodes = applyNodeChanges(
+        nodeAdditions.concat(nodeSelectionChanges),
+        state.nodes
+      );
+
+      state.edges = applyEdgeChanges(
+        edgeAdditions.concat(edgeSelectionChanges),
+        state.edges
+      );
+
+      newNodes.forEach((node) => {
+        state.nodeExecutionStates[node.id] = {
+          status: NodeStatus.PENDING,
+          error: null,
+          progress: null,
+          progressImage: null,
+        };
+      });
+    },
   },
   extraReducers: (builder) => {
     builder.addCase(receivedOpenAPISchema.pending, (state) => {
@@ -703,6 +792,8 @@ export const {
   fieldLabelChanged,
   viewportChanged,
   mouseOverFieldChanged,
+  selectionCopied,
+  selectionPasted,
 } = nodesSlice.actions;
 
 export default nodesSlice.reducer;

invokeai/frontend/web/src/features/nodes/store/types.ts

@@ -31,4 +31,6 @@ export type NodesState = {
   viewport: Viewport;
   isReady: boolean;
   mouseOverField: FieldIdentifier | null;
+  nodesToCopy: Node<NodeData>[];
+  edgesToCopy: Edge<InvocationEdgeExtra>[];
 };

invokeai/frontend/web/src/features/nodes/store/util/findUnoccupiedPosition.ts

@@ -0,0 +1,11 @@
+import { Node } from 'reactflow';
+
+export const findUnoccupiedPosition = (nodes: Node[], x: number, y: number) => {
+  let newX = x;
+  let newY = y;
+  while (nodes.find((n) => n.position.x === newX && n.position.y === newY)) {
+    newX = newX + 50;
+    newY = newY + 50;
+  }
+  return { x: newX, y: newY };
+};