From 2660a8b454ec86250fc7679df95f76441fb84aad Mon Sep 17 00:00:00 2001
From: bobzel <zzzman@gmail.com>
Date: Tue, 2 May 2023 12:37:04 -0400
Subject: fixed ink erasing when stroke intersects at endpoint.  attempted
 performance improvement as well.  bug fix for selecting strokes that are not
 active.

---
 .../collectionFreeForm/CollectionFreeFormView.tsx  | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

(limited to 'src/client/views/collections/collectionFreeForm')

diff --git a/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx b/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
index bab42e560..9cc732008 100644
--- a/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
+++ b/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
@@ -821,6 +821,7 @@ export class CollectionFreeFormView extends CollectionSubView<Partial<collection
         this._lastY = e.clientY;
     };
 
+    _eraserLock = 0;
     /**
      * Erases strokes by intersecting them with an invisible "eraser stroke".
      *  By default this iterates through all intersected ink strokes, determines their segmentation, draws back the non-intersected segments,
@@ -830,6 +831,7 @@ export class CollectionFreeFormView extends CollectionSubView<Partial<collection
     @action
     onEraserMove = (e: PointerEvent, down: number[], delta: number[]) => {
         const currPoint = { X: e.clientX, Y: e.clientY };
+        if (this._eraserLock) return false; // bcz: should be fixed by putting it on a queue to be processed after the last eraser movement is processed.
         this.getEraserIntersections({ X: currPoint.X - delta[0], Y: currPoint.Y - delta[1] }, currPoint).forEach(intersect => {
             if (!this._deleteList.includes(intersect.inkView)) {
                 this._deleteList.push(intersect.inkView);
@@ -837,12 +839,15 @@ export class CollectionFreeFormView extends CollectionSubView<Partial<collection
                 SetActiveInkColor(StrCast(intersect.inkView.rootDoc.color?.toString()) || 'black');
                 // create a new curve by appending all curves of the current segment together in order to render a single new stroke.
                 if (!e.shiftKey) {
+                    this._eraserLock++;
                     this.segmentInkStroke(intersect.inkView, intersect.t).forEach(segment =>
-                        GestureOverlay.Instance.dispatchGesture(
+                        this.forceStrokeGesture(
+                            e,
                             GestureUtils.Gestures.Stroke,
                             segment.reduce((data, curve) => [...data, ...curve.points.map(p => intersect.inkView.ComponentView?.ptToScreen?.({ X: p.x, Y: p.y }) ?? { X: 0, Y: 0 })], [] as PointData[])
                         )
                     );
+                    setTimeout(() => this._eraserLock--);
                 }
                 // Lower ink opacity to give the user a visual indicator of deletion.
                 intersect.inkView.layoutDoc.opacity = 0.5;
@@ -851,6 +856,9 @@ export class CollectionFreeFormView extends CollectionSubView<Partial<collection
         });
         return false;
     };
+    forceStrokeGesture = (e: PointerEvent, gesture: GestureUtils.Gestures, points: InkData, text?: any) => {
+        this.onGesture(e, new GestureUtils.GestureEvent(gesture, points, GestureOverlay.getBounds(points), text));
+    };
 
     @action
     onPointerMove = (e: PointerEvent): boolean => {
@@ -929,7 +937,7 @@ export class CollectionFreeFormView extends CollectionSubView<Partial<collection
                     const docCurveTVal = t + Math.floor(i / 4);
                     if (excludeT < startSegmentT || excludeT > docCurveTVal) {
                         const localStartTVal = startSegmentT - Math.floor(i / 4);
-                        segment.push(inkSegment.split(localStartTVal < 0 ? 0 : localStartTVal, t));
+                        t !== (localStartTVal < 0 ? 0 : localStartTVal) && segment.push(inkSegment.split(localStartTVal < 0 ? 0 : localStartTVal, t));
                         segment.length && segments.push(segment);
                     }
                     // start a new segment from the intersection t value
@@ -979,11 +987,21 @@ export class CollectionFreeFormView extends CollectionSubView<Partial<collection
                     if (ink?.Document === otherInk.props.Document && neighboringSegment) continue;
 
                     const otherCurve = new Bezier(otherCtrlPts.slice(j, j + 4).map(p => ({ x: p.X, y: p.Y })));
+                    const c0 = otherCurve.get(0);
+                    const c1 = otherCurve.get(1);
+                    const apt = curve.project(c0);
+                    const bpt = curve.project(c1);
+                    if (apt.d !== undefined && apt.d < 1 && apt.t !== undefined && !tVals.includes(apt.t)) {
+                        tVals.push(apt.t);
+                    }
                     this.bintersects(curve, otherCurve).forEach((val: string | number, i: number) => {
                         // Converting the Bezier.js Split type to a t-value number.
                         const t = +val.toString().split('/')[0];
                         if (i % 2 === 0 && !tVals.includes(t)) tVals.push(t); // bcz: Hack!  don't know why but intersection points are doubled from bezier.js (but not identical).
                     });
+                    if (bpt.d !== undefined && bpt.d < 1 && bpt.t !== undefined && !tVals.includes(bpt.t)) {
+                        tVals.push(bpt.t);
+                    }
                 }
             });
         return tVals;
-- 
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