feat: implement workspaces

2022-04-04 21:42:48 +02:00
parent cc96739c38
commit cd817b7f53
153 changed files with 8970 additions and 1191 deletions
@@ -0,0 +1,95 @@
+import { Position } from '~/types'
+
+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]
+}
+
+export function getSimpleBezierPath({
+  sourceX,
+  sourceY,
+  sourcePosition = Position.Bottom,
+  targetX,
+  targetY,
+  targetPosition = Position.Top,
+}: GetSimpleBezierPathParams): string {
+  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,
+  })
+  return `M${sourceX},${sourceY} C${sourceControlX},${sourceControlY} ${targetControlX},${targetControlY} ${targetX},${targetY}`
+}
+
+// @TODO: this function will recalculate the control points
+// one option is to let getXXXPath() return center points
+// but will introduce breaking changes
+// the getCenter() of other types of edges might need to change, too
+export function getSimpleBezierCenter({
+  sourceX,
+  sourceY,
+  sourcePosition = Position.Bottom,
+  targetX,
+  targetY,
+  targetPosition = Position.Top,
+}: GetSimpleBezierPathParams): [number, number, number, 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,
+  })
+  // cubic bezier t=0.5 mid point, not the actual mid point, but easy to calculate
+  // https://stackoverflow.com/questions/67516101/how-to-find-distance-mid-point-of-bezier-curve
+  const centerX = sourceX * 0.125 + sourceControlX * 0.375 + targetControlX * 0.375 + targetX * 0.125
+  const centerY = sourceY * 0.125 + sourceControlY * 0.375 + targetControlY * 0.375 + targetY * 0.125
+  const xOffset = Math.abs(centerX - sourceX)
+  const yOffset = Math.abs(centerY - sourceY)
+  return [centerX, centerY, xOffset, yOffset]
+}