refactor(core,edges): replace edge utils with existing @xyflow/system exports (#1547)

* refactor(core,edges): replace edge helpers with xyflow/system exports

Signed-off-by: braks <[email protected]>

* chore(core): cleanup

Signed-off-by: braks <[email protected]>

* chore(changeset): add

Signed-off-by: braks <[email protected]>

* chore(core): cleanup exports

Signed-off-by: braks <[email protected]>

---------

Signed-off-by: braks <[email protected]>

Author: bcakmakoglu

.changeset/ten-snails-flash.md

@@ -0,0 +1,5 @@
+---
+"@vue-flow/core": minor
+---
+
+Replace existing edge utils with ones that are already provided by `@xyflow/system` and re-export them

packages/core/src/components/ConnectionLine/index.ts

@@ -1,10 +1,11 @@
 import { computed, defineComponent, h, inject } from 'vue'
+import { getBezierPath, getSmoothStepPath } from '@xyflow/system'
 import type { HandleElement } from '../../types'
 import { ConnectionLineType, ConnectionMode, Position } from '../../types'
 import { getHandlePosition, getMarkerId } from '../../utils'
 import { useVueFlow } from '../../composables'
 import { Slots } from '../../context'
-import { getBezierPath, getSimpleBezierPath, getSmoothStepPath } from '../Edges/utils'
+import { getSimpleBezierPath } from '../Edges/SimpleBezierEdge'
 
 const oppositePosition = {
   [Position.Left]: Position.Right,

packages/core/src/components/Edges/BezierEdge.ts

@@ -1,8 +1,8 @@
 import { defineComponent, h } from 'vue'
+import { getBezierPath } from '@xyflow/system'
 import type { BezierEdgeProps } from '../../types'
 import { Position } from '../../types'
 import BaseEdge from './BaseEdge.vue'
-import { getBezierPath } from './utils'
 
 const BezierEdge = defineComponent<BezierEdgeProps>({
   name: 'BezierEdge',

packages/core/src/components/Edges/SimpleBezierEdge.ts

@@ -1,8 +1,99 @@
 import { defineComponent, h } from 'vue'
+import { getBezierEdgeCenter } from '@xyflow/system'
 import type { SimpleBezierEdgeProps } from '../../types'
 import { Position } from '../../types'
 import BaseEdge from './BaseEdge.vue'
-import { getSimpleBezierPath } from './utils'
+
+export interface GetSimpleBezierPathParams {
+  sourceX: number
+  sourceY: number
+  sourcePosition?: Position
+  targetX: number
+  targetY: number
+  targetPosition?: Position
+}
+
+interface GetControlParams {
+  pos: Position
+  x1: number
+  y1: number
+  x2: number
+  y2: number
+}
+
+function getControl({ pos, x1, y1, x2, y2 }: GetControlParams): [number, number] {
+  let ctX: number, ctY: number
+  switch (pos) {
+    case Position.Left:
+    case Position.Right:
+      ctX = 0.5 * (x1 + x2)
+      ctY = y1
+      break
+    case Position.Top:
+    case Position.Bottom:
+      ctX = x1
+      ctY = 0.5 * (y1 + y2)
+      break
+  }
+  return [ctX, ctY]
+}
+
+/**
+ * Get a simple bezier path from source to target handle (no curvature)
+ * @public
+ *
+ * @param simpleBezierPathParams
+ * @param simpleBezierPathParams.sourceX - The x position of the source handle
+ * @param simpleBezierPathParams.sourceY - The y position of the source handle
+ * @param simpleBezierPathParams.sourcePosition - The position of the source handle (default: Position.Bottom)
+ * @param simpleBezierPathParams.targetX - The x position of the target handle
+ * @param simpleBezierPathParams.targetY - The y position of the target handle
+ * @param simpleBezierPathParams.targetPosition - The position of the target handle (default: Position.Top)
+ * @returns A path string you can use in an SVG, the labelX and labelY position (center of path) and offsetX, offsetY between source handle and label
+ */
+export function getSimpleBezierPath({
+  sourceX,
+  sourceY,
+  sourcePosition = Position.Bottom,
+  targetX,
+  targetY,
+  targetPosition = Position.Top,
+}: GetSimpleBezierPathParams): [path: string, labelX: number, labelY: number, offsetX: number, offsetY: number] {
+  const [sourceControlX, sourceControlY] = getControl({
+    pos: sourcePosition,
+    x1: sourceX,
+    y1: sourceY,
+    x2: targetX,
+    y2: targetY,
+  })
+
+  const [targetControlX, targetControlY] = getControl({
+    pos: targetPosition,
+    x1: targetX,
+    y1: targetY,
+    x2: sourceX,
+    y2: sourceY,
+  })
+
+  const [labelX, labelY, offsetX, offsetY] = getBezierEdgeCenter({
+    sourceX,
+    sourceY,
+    targetX,
+    targetY,
+    sourceControlX,
+    sourceControlY,
+    targetControlX,
+    targetControlY,
+  })
+
+  return [
+    `M${sourceX},${sourceY} C${sourceControlX},${sourceControlY} ${targetControlX},${targetControlY} ${targetX},${targetY}`,
+    labelX,
+    labelY,
+    offsetX,
+    offsetY,
+  ]
+}
 
 const SimpleBezierEdge = defineComponent<SimpleBezierEdgeProps>({
   name: 'SimpleBezierEdge',

packages/core/src/components/Edges/SmoothStepEdge.ts

@@ -1,8 +1,8 @@
 import { defineComponent, h } from 'vue'
+import { getSmoothStepPath } from '@xyflow/system'
 import type { SmoothStepEdgeProps } from '../../types'
 import { Position } from '../../types'
 import BaseEdge from './BaseEdge.vue'
-import { getSmoothStepPath } from './utils'
 
 const SmoothStepEdge = defineComponent<SmoothStepEdgeProps>({
   name: 'SmoothStepEdge',

packages/core/src/components/Edges/StraightEdge.ts

@@ -1,7 +1,7 @@
 import { defineComponent, h } from 'vue'
+import { getStraightPath } from '@xyflow/system'
 import type { StraightEdgeProps } from '../../types'
 import BaseEdge from './BaseEdge.vue'
-import { getStraightPath } from './utils'
 
 const StraightEdge = defineComponent<StraightEdgeProps>({
   name: 'StraightEdge',