refactor(nodes): only trigger dragging flag when a change has occured

Signed-off-by: braks <78412429+bcakmakoglu@users.noreply.github.com>

packages/core/src/auto-imports.d.ts

@@ -176,7 +176,6 @@ declare global {
   const until: typeof import('@vueuse/core')['until']
   const updateEdge: typeof import('./utils/graph')['updateEdge']
   const updateEdgeAction: typeof import('./utils/store')['updateEdgeAction']
-  const updatePosition: typeof import('./utils/drag')['updatePosition']
   const useActions: typeof import('./store/actions')['useActions']
   const useActiveElement: typeof import('@vueuse/core')['useActiveElement']
   const useAsyncQueue: typeof import('@vueuse/core')['useAsyncQueue']

packages/core/src/composables/useDrag.ts

@@ -3,7 +3,7 @@ import { drag } from 'd3-drag'
 import { select } from 'd3-selection'
 import type { Ref } from 'vue'
 import type { MaybeRef } from '@vueuse/core'
-import type { NodeDragEvent, NodeDragItem, SnapGrid, XYPosition } from '~/types'
+import type { CoordinateExtent, NodeDragEvent, NodeDragItem, SnapGrid, XYPosition } from '~/types'
 
 export type UseDragEvent = D3DragEvent<HTMLDivElement, null, SubjectPosition>
 
@@ -90,8 +90,6 @@ function useDrag(params: UseDragParams) {
                   getNode: $$(getNode),
                 })
                 onStart(event.sourceEvent, currentNode, nodes)
-
-                dragging.value = true
               }
             })
             .on('drag', (event: UseDragEvent) => {
@@ -99,19 +97,32 @@ function useDrag(params: UseDragParams) {
 
               const mousePos = getMousePosition(event, snapGrid)
 
+              let hasChange = false
+
               // skip events without movement
               if ((lastPos.x !== mousePos.x || lastPos.y !== mousePos.y) && dragItems) {
                 lastPos = mousePos
-                dragItems = dragItems.map((n) =>
-                  updatePosition(
-                    n,
-                    mousePos,
-                    !!snapGrid ?? snapToGrid,
-                    snapGrid ?? globalSnapGrid,
-                    n.parentNode ? getNode(n.parentNode) : undefined,
-                    nodeExtent,
-                  ),
-                )
+
+                dragItems = dragItems.map((n) => {
+                  const nextPosition = { x: mousePos.x - n.distance.x, y: mousePos.y - n.distance.y }
+
+                  if (snapToGrid && snapGrid) {
+                    const [snapX, snapY] = snapGrid
+                    nextPosition.x = snapX * Math.round(nextPosition.x / snapX)
+                    nextPosition.y = snapY * Math.round(nextPosition.y / snapY)
+                  }
+
+                  const currentExtent = applyExtent(n, nodeExtent, n.parentNode ? getNode(n.parentNode) : undefined)
+
+                  // we want to make sure that we only fire a change event when there is a changes
+                  hasChange = hasChange || n.position.x !== nextPosition.x || n.position.y !== nextPosition.y
+
+                  n.position = currentExtent ? clampPosition(nextPosition, currentExtent as CoordinateExtent) : nextPosition
+
+                  return n
+                })
+
+                if (!hasChange) return
 
                 updateNodePositions(dragItems, true, true)
 

packages/core/src/utils/drag.ts

@@ -1,5 +1,5 @@
 import type { Ref } from 'vue'
-import type { ComputedGetters, CoordinateExtent, Getters, GraphNode, NodeDragItem, SnapGrid, XYPosition } from '~/types'
+import type { ComputedGetters, CoordinateExtent, Getters, GraphNode, NodeDragItem, XYPosition } from '~/types'
 
 export function hasSelector(target: Element, selector: string, node: Ref<Element>): boolean {
   let current = target
@@ -58,28 +58,6 @@ export function getEventHandlerParams({
   return [id ? extendedDragItems.find((n) => n.id === id)! : extendedDragItems[0], extendedDragItems]
 }
 
-export function updatePosition(
-  dragItem: NodeDragItem,
-  mousePos: XYPosition,
-  snapToGrid?: boolean,
-  snapGrid?: SnapGrid,
-  parent?: GraphNode,
-  nodeExtent?: CoordinateExtent,
-): NodeDragItem {
-  const nextPosition = { x: mousePos.x - dragItem.distance.x, y: mousePos.y - dragItem.distance.y }
-  if (snapToGrid && snapGrid) {
-    const [snapX, snapY] = snapGrid
-    nextPosition.x = snapX * Math.round(nextPosition.x / snapX)
-    nextPosition.y = snapY * Math.round(nextPosition.y / snapY)
-  }
-
-  const currentExtent = applyExtent(dragItem, nodeExtent, parent)
-
-  dragItem.position = currentExtent ? clampPosition(nextPosition, currentExtent as CoordinateExtent) : nextPosition
-
-  return dragItem
-}
-
 export function applyExtent<T extends NodeDragItem | GraphNode>(item: T, extent?: CoordinateExtent, parent?: GraphNode) {
   const currentExtent = item.extent ?? extent
   let nextExtent = currentExtent