feat: handle empty link drop in Vue

src/components/searchbox/NodeSearchBoxPopover.vue

@@ -262,17 +262,26 @@ function cancelNextReset(e: CustomEvent<CanvasPointerEvent>) {
 }
 
 function handleDroppedOnCanvas(e: CustomEvent<CanvasPointerEvent>) {
-  disconnectOnReset = true
-  const action = e.detail.shiftKey
+  const pendingAction = searchBoxStore.pendingLinkDropAction
+  searchBoxStore.setPendingLinkDropAction(null)
+
+  const fallbackAction = e.detail.shiftKey
     ? linkReleaseActionShift.value
     : linkReleaseAction.value
+
+  const action =
+    pendingAction ?? fallbackAction ?? LinkReleaseTriggerAction.NO_ACTION
+
+  disconnectOnReset = action !== LinkReleaseTriggerAction.NO_ACTION
+  if (!disconnectOnReset) return
+
+  cancelNextReset(e)
+
   switch (action) {
     case LinkReleaseTriggerAction.SEARCH_BOX:
-      cancelNextReset(e)
       showSearchBox(e.detail)
       break
     case LinkReleaseTriggerAction.CONTEXT_MENU:
-      cancelNextReset(e)
       showContextMenu(e.detail)
       break
     case LinkReleaseTriggerAction.NO_ACTION:

src/lib/litegraph/src/LGraphCanvas.ts

@@ -228,6 +228,16 @@ const cursors = {
   NW: 'nwse-resize'
 } as const
 
+/** A lightweight converter for client<->canvas coordinate transforms. */
+interface PositionConverter {
+  /** Convert a client/pointer position to canvas (graph) space. */
+  clientPosToCanvasPos(pos: Point): Point
+  /** Convert a canvas (graph) position to client space. */
+  canvasPosToClientPos(pos: Point): Point
+  /** Optional hook to refresh internal caches (e.g. bounding rect). */
+  update?(): void
+}
+
 /**
  * This class is in charge of rendering one graph inside a canvas. And provides all the interaction required.
  * Valid callbacks are: onNodeSelected, onNodeDeselected, onShowNodePanel, onNodeDblClicked
@@ -478,11 +488,19 @@ export class LGraphCanvas
     return this._isLowQuality
   }
 
+  /**
+   * Converts pointer/client positions to canvas positions without forcing layout reads.
+   * When present, {@link adjustMouseEvent} will use this instead of DOM queries.
+   */
+  positionConverter?: PositionConverter
+
   options: {
     skip_events?: any
     viewport?: any
     skip_render?: any
     autoresize?: any
+    /** Optional converter for client<->canvas position transforms. */
+    positionConverter?: PositionConverter
   }
 
   background_image: string
@@ -739,6 +757,8 @@ export class LGraphCanvas
   ) {
     options ||= {}
     this.options = options
+    if (options.positionConverter)
+      this.positionConverter = options.positionConverter
 
     // if(graph === undefined)
     // throw ("No graph assigned");
@@ -4453,33 +4473,54 @@ export class LGraphCanvas
   adjustMouseEvent<T extends MouseEvent>(
     e: T & Partial<CanvasPointerExtensions>
   ): asserts e is T & CanvasPointerEvent {
-    let clientX_rel = e.clientX
-    let clientY_rel = e.clientY
+    const { ds, positionConverter } = this
 
-    if (this.canvas) {
-      const b = this.canvas.getBoundingClientRect()
-      clientX_rel -= b.left
-      clientY_rel -= b.top
-    }
+    if (positionConverter) {
+      const [canvasX, canvasY] = positionConverter.clientPosToCanvasPos([
+        e.clientX,
+        e.clientY
+      ])
 
-    e.safeOffsetX = clientX_rel
-    e.safeOffsetY = clientY_rel
+      // safeOffset is relative to the canvas element (like offsetX/Y), not page
+      const safeX = (canvasX + ds.offset[0]) * ds.scale
+      const safeY = (canvasY + ds.offset[1]) * ds.scale
 
-    // TODO: Find a less brittle way to do this
+      e.canvasX = canvasX
+      e.canvasY = canvasY
+      e.safeOffsetX = safeX
+      e.safeOffsetY = safeY
 
-    // Only set deltaX and deltaY if not already set.
-    // If deltaX and deltaY are already present, they are read-only.
-    // Setting them would result browser error => zoom in/out feature broken.
-    if (e.deltaX === undefined)
-      e.deltaX = clientX_rel - this.last_mouse_position[0]
-    if (e.deltaY === undefined)
-      e.deltaY = clientY_rel - this.last_mouse_position[1]
+      if (e.deltaX === undefined) e.deltaX = safeX - this.last_mouse_position[0]
+      if (e.deltaY === undefined) e.deltaY = safeY - this.last_mouse_position[1]
 
-    this.last_mouse_position[0] = clientX_rel
-    this.last_mouse_position[1] = clientY_rel
+      this.last_mouse_position[0] = safeX
+      this.last_mouse_position[1] = safeY
+    } else {
+      // Fallback to DOM rect (legacy path)
+      let clientX_rel = e.clientX
+      let clientY_rel = e.clientY
 
-    e.canvasX = clientX_rel / this.ds.scale - this.ds.offset[0]
-    e.canvasY = clientY_rel / this.ds.scale - this.ds.offset[1]
+      if (this.canvas) {
+        const b = this.canvas.getBoundingClientRect()
+        clientX_rel -= b.left
+        clientY_rel -= b.top
+      }
+
+      e.safeOffsetX = clientX_rel
+      e.safeOffsetY = clientY_rel
+
+      // Only set deltaX and deltaY if not already set.
+      if (e.deltaX === undefined)
+        e.deltaX = clientX_rel - this.last_mouse_position[0]
+      if (e.deltaY === undefined)
+        e.deltaY = clientY_rel - this.last_mouse_position[1]
+
+      this.last_mouse_position[0] = clientX_rel
+      this.last_mouse_position[1] = clientY_rel
+
+      e.canvasX = clientX_rel / ds.scale - ds.offset[0]
+      e.canvasY = clientY_rel / ds.scale - ds.offset[1]
+    }
   }
 
   /**

src/renderer/extensions/vueNodes/composables/useSlotLinkInteraction.ts

@@ -3,6 +3,7 @@ import { onBeforeUnmount } from 'vue'
 
 import { useSharedCanvasPositionConversion } from '@/composables/element/useCanvasPositionConversion'
 import type { LGraph } from '@/lib/litegraph/src/LGraph'
+import type { LGraphCanvas } from '@/lib/litegraph/src/LGraphCanvas'
 import type { LGraphNode } from '@/lib/litegraph/src/LGraphNode'
 import { LLink } from '@/lib/litegraph/src/LLink'
 import type { Reroute } from '@/lib/litegraph/src/Reroute'
@@ -11,7 +12,9 @@ import type {
   INodeInputSlot,
   INodeOutputSlot
 } from '@/lib/litegraph/src/interfaces'
+import type { CanvasPointerEvent } from '@/lib/litegraph/src/types/events'
 import { LinkDirection } from '@/lib/litegraph/src/types/globalEnums'
+import { useSettingStore } from '@/platform/settings/settingStore'
 import { createLinkConnectorAdapter } from '@/renderer/core/canvas/links/linkConnectorAdapter'
 import type { LinkConnectorAdapter } from '@/renderer/core/canvas/links/linkConnectorAdapter'
 import {
@@ -24,6 +27,8 @@ import type { Point } from '@/renderer/core/layout/types'
 import { toPoint } from '@/renderer/core/layout/utils/geometry'
 import { createSlotLinkDragSession } from '@/renderer/extensions/vueNodes/composables/slotLinkDragSession'
 import { app } from '@/scripts/app'
+import { useSearchBoxStore } from '@/stores/workspace/searchBoxStore'
+import { LinkReleaseTriggerAction } from '@/types/searchBoxTypes'
 import { createRafBatch } from '@/utils/rafBatch'
 
 interface SlotInteractionOptions {
@@ -98,6 +103,23 @@ export function useSlotLinkInteraction({
   // Per-drag drag-state cache
   const dragSession = createSlotLinkDragSession()
 
+  const settingStore = useSettingStore()
+  const searchBoxStore = useSearchBoxStore()
+
+  const resolveDropAction = (event: PointerEvent): LinkReleaseTriggerAction => {
+    const baseAction =
+      (settingStore.get('Comfy.LinkRelease.Action') as
+        | LinkReleaseTriggerAction
+        | null
+        | undefined) ?? LinkReleaseTriggerAction.NO_ACTION
+    const shiftAction = settingStore.get('Comfy.LinkRelease.ActionShift') as
+      | LinkReleaseTriggerAction
+      | null
+      | undefined
+
+    return event.shiftKey ? shiftAction ?? baseAction : baseAction
+  }
+
   function candidateFromTarget(
     target: EventTarget | null
   ): SlotDropCandidate | null {
@@ -502,29 +524,46 @@ export function useSlotLinkInteraction({
       return
     }
 
-    // Prefer using the snapped candidate captured during hover for perf + consistency
+    // Prefer using any snapped candidate captured during hover
     const snappedCandidate = state.candidate?.compatible
       ? state.candidate
       : null
 
     let connected = tryConnectToCandidate(snappedCandidate)
 
-    // Fallback to DOM slot under pointer (if any), then node fallback, then reroute
+    //  Then fallback to DOM slot under pointer
     if (!connected) {
       const domCandidate = candidateFromTarget(event.target)
       connected = tryConnectToCandidate(domCandidate)
     }
 
+    // Then fallback to node under pointer
     if (!connected) {
       const nodeCandidate = candidateFromNodeTarget(event.target)
       connected = tryConnectToCandidate(nodeCandidate)
     }
 
+    // Then fallback to reroute under pointer
     if (!connected) connected = tryConnectViaRerouteAtPointer() || connected
 
-    // Drop on canvas: disconnect moving input link(s)
-    if (!connected && !snappedCandidate && state.source.type === 'input') {
-      ensureActiveAdapter()?.disconnectMovingLinks()
+    // Then fallback to dropping on canvas under pointer
+    if (!connected && !snappedCandidate) {
+      const canvas: LGraphCanvas | null = app.canvas
+      const adapter = ensureActiveAdapter()
+      if (adapter && canvas) {
+        const action = resolveDropAction(event)
+        if (action === LinkReleaseTriggerAction.NO_ACTION)
+          adapter.disconnectMovingLinks()
+
+        const adjustMouseEvent: (
+          e: PointerEvent
+        ) => asserts e is PointerEvent & CanvasPointerEvent =
+          canvas.adjustMouseEvent.bind(canvas)
+        adjustMouseEvent(event)
+
+        searchBoxStore.setPendingLinkDropAction(action)
+        canvas.linkConnector?.dropOnNothing(event)
+      }
     }
 
     cleanupInteraction()

src/scripts/app.ts

@@ -903,6 +903,9 @@ export class ComfyApp {
       this.canvasContainer,
       this.canvas
     )
+
+    // Provide high-performance position converter to LGraphCanvas
+    this.canvas.positionConverter = this.#positionConversion
   }
 
   resizeCanvas() {

src/stores/workspace/searchBoxStore.ts

@@ -5,6 +5,7 @@ import { computed, ref, shallowRef } from 'vue'
 import type NodeSearchBoxPopover from '@/components/searchbox/NodeSearchBoxPopover.vue'
 import type { CanvasPointerEvent } from '@/lib/litegraph/src/litegraph'
 import { useSettingStore } from '@/platform/settings/settingStore'
+import type { LinkReleaseTriggerAction } from '@/types/searchBoxTypes'
 
 export const useSearchBoxStore = defineStore('searchBox', () => {
   const settingStore = useSettingStore()
@@ -41,10 +42,17 @@ export const useSearchBoxStore = defineStore('searchBox', () => {
     )
   }
 
+  const pendingLinkDropAction = ref<LinkReleaseTriggerAction | null>(null)
+  function setPendingLinkDropAction(action: LinkReleaseTriggerAction | null) {
+    pendingLinkDropAction.value = action
+  }
+
   return {
     newSearchBoxEnabled,
     setPopoverRef,
     toggleVisible,
-    visible
+    visible,
+    pendingLinkDropAction,
+    setPendingLinkDropAction
   }
 })