snapshot of https://github.com/toeverything/AFFiNE.git (canary, 2026-09-16; blobs > 131072B omitted)

blocksuite/framework/global/src/gfx/model/point-location.ts

@@ -0,0 +1,94 @@
+import { type IVec, Vec } from './vec.js';
+
+/**
+ * PointLocation is an implementation of IVec with in/out vectors and tangent.
+ * This is useful when dealing with path.
+ */
+export class PointLocation extends Array<number> implements IVec {
+  _in: IVec = [0, 0];
+
+  _out: IVec = [0, 0];
+
+  // the tangent belongs to the point on the element outline
+  _tangent: IVec = [0, 0];
+
+  [0]: number;
+
+  [1]: number;
+
+  get absIn() {
+    return Vec.add(this, this._in);
+  }
+
+  get absOut() {
+    return Vec.add(this, this._out);
+  }
+
+  get in() {
+    return this._in;
+  }
+
+  set in(value: IVec) {
+    this._in = value;
+  }
+
+  override get length() {
+    return super.length as 2;
+  }
+
+  get out() {
+    return this._out;
+  }
+
+  set out(value: IVec) {
+    this._out = value;
+  }
+
+  get tangent() {
+    return this._tangent;
+  }
+
+  set tangent(value: IVec) {
+    this._tangent = value;
+  }
+
+  constructor(
+    point: IVec = [0, 0],
+    tangent: IVec = [0, 0],
+    inVec: IVec = [0, 0],
+    outVec: IVec = [0, 0]
+  ) {
+    super(2);
+    this[0] = point[0];
+    this[1] = point[1];
+    this._tangent = tangent;
+    this._in = inVec;
+    this._out = outVec;
+  }
+
+  static fromVec(vec: IVec) {
+    const point = new PointLocation();
+    point[0] = vec[0];
+    point[1] = vec[1];
+    return point;
+  }
+
+  clone() {
+    return new PointLocation(
+      this as unknown as IVec,
+      this._tangent,
+      this._in,
+      this._out
+    );
+  }
+
+  setVec(vec: IVec) {
+    this[0] = vec[0];
+    this[1] = vec[1];
+    return this;
+  }
+
+  toVec(): IVec {
+    return [this[0], this[1]];
+  }
+}