feat(editor): visualize binding midpoints + support for simple arrows (#10611)

* feat: Force exact center focus point

When the projected point is close to center snap it to the exact center.

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Tests

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Snap to center around side mid point.

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* Trigger CI

* fix: Midpoint outline focus point

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Tests

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Dragging existing arrow reset focus point on outline

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Tests

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* feat: Midpoint indicator

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Rotated mid points

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: No hole

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* feat: Cache hits and scene lookups

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* chore: Remove debug

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Consider hit threshold and inside override too

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Increase outline midpoint sticky distance

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Don't show midpoint indicator when no snapping is possible

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* feat: Indicate lock-in

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* chore: Remove Map caching

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: incorrect threshold

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: threshold setting

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Hit caching

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Simple arrow mid point selection inconsistency

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: cache override

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Precise know dragging with midpoint refactor

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fear: Frame support

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Crossing arrow won't trigger mid point

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Arrow creation point highlight

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Restore types & tests

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* chore: Restore restore.ts

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: restore.ts

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Elbow arrows reliably highlight center point

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Highlight point ordering

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* feat: Bind with focus point across shape

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Lint

* fix: Midpoint and binding alignment

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* chore: Indicator color

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* chore: More knob tuning

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Radius

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* fix: Tests

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>

* simplify point indicators

---------

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>
Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>

packages/excalidraw/data/restore.ts

@@ -82,7 +82,12 @@ import {
   getNormalizedZoom,
 } from "../scene";
 
-import type { AppState, BinaryFiles, LibraryItem } from "../types";
+import type {
+  AppState,
+  BinaryFiles,
+  LibraryItem,
+  NormalizedZoomValue,
+} from "../types";
 import type { ImportedDataState, LegacyAppState } from "./types";
 
 type RestoredAppState = Omit<
@@ -212,6 +217,7 @@ const repairBinding = <T extends ExcalidrawArrowElement>(
               boundElement,
               startOrEnd,
               elementsMap,
+              { value: 1 as NormalizedZoomValue },
             ) || p;
       const { fixedPoint } = calculateFixedPointForNonElbowArrowBinding(
         element,