made IsClosed a static function. fixed warnings and errors.

1 files changed, 4 insertions, 3 deletions

diff --git a/src/client/views/InkTangentHandles.tsx b/src/client/views/InkTangentHandles.tsx
index 4f1a406c2..8f7bef936 100644
--- a/src/client/views/InkTangentHandles.tsx
+++ b/src/client/views/InkTangentHandles.tsx
@@ -11,6 +11,7 @@ import { Transform } from "../util/Transform";
 import { UndoManager } from "../util/UndoManager";
 import { Colors } from "./global/globalEnums";
 import { InkStrokeProperties } from "./InkStrokeProperties";
+import { InkingStroke } from "./InkingStroke";
 
 export interface InkHandlesProps {
     inkDoc: Doc;
@@ -53,8 +54,8 @@ export class InkTangentHandles extends React.Component<InkHandlesProps> {
      */
     @action
     onBreakTangent = (controlIndex: number) => {
-        const closed = this.props.screenCtrlPoints.lastElement().X === this.props.screenCtrlPoints[0].X && this.props.screenCtrlPoints.lastElement().Y === this.props.screenCtrlPoints[0].Y;
-        var brokenIndices = Cast(this.props.inkDoc.brokenInkIndices, listSpec("number"));
+        const closed = InkingStroke.IsClosed(this.props.screenCtrlPoints);
+        const brokenIndices = Cast(this.props.inkDoc.brokenInkIndices, listSpec("number"));
         if (!brokenIndices?.includes(controlIndex) &&
             ((controlIndex > 0 && controlIndex < this.props.screenCtrlPoints.length - 1) || closed)) {
             if (brokenIndices) brokenIndices.push(controlIndex);
@@ -70,7 +71,7 @@ export class InkTangentHandles extends React.Component<InkHandlesProps> {
         const data = this.props.screenCtrlPoints;
         const tangentHandles: HandlePoint[] = [];
         const tangentLines: HandleLine[] = [];
-        const closed = data.lastElement().X === data[0].X && data.lastElement().Y === data[0].Y;
+        const closed = InkingStroke.IsClosed(data);
         if (data.length >= 4) {
             for (let i = 0; i <= data.length - 4; i += 4) {
                 tangentHandles.push({ ...data[i + 1], I: i + 1, dot1: i, dot2: i === 0 ? (closed ? data.length - 1 : i) : i - 1 });