Refactoring in pointer down event handler, step 2 (#1887)

* Refactor: introduce pointer down state to replace implicit closure state with an explicit object

* Refactor: use pointer down state for resize handle

* Refactor: use pointer down state for isResizing

* Refactor: use pointer down state for resizing offset

* Refactor: use pointer down state for hit element

* Refactor: move selection handling out of pointer down event handler

* Refactor: move text handling out of pointer down event handler

* Refactor: move linear tools handling out of pointer down event handler

* Refactor: move element creation out of pointer down handler

src/utils.ts

@@ -241,3 +241,10 @@ const RE_RTL_CHECK = new RegExp(`^[^${RS_LTR_CHARS}]*[${RS_RTL_CHARS}]`);
 export const isRTL = (text: string) => {
   return RE_RTL_CHECK.test(text);
 };
+
+export function tupleToCoors(
+  xyTuple: [number, number],
+): { x: number; y: number } {
+  const [x, y] = xyTuple;
+  return { x, y };
+}