Merge pull request #26853 from software-mansion-labs/ts-migration/cal…

…culateAnchorPosition

[TS migration] Migrate 'calculateAnchorPosition.js' lib to TypeScript

src/libs/calculateAnchorPosition.ts

@@ -0,0 +1,32 @@
+/* eslint-disable no-console */
+import {ValueOf} from 'type-fest';
+import {View} from 'react-native';
+import CONST from '../CONST';
+
+type AnchorOrigin = {
+    horizontal: ValueOf<typeof CONST.MODAL.ANCHOR_ORIGIN_HORIZONTAL>;
+    vertical: ValueOf<typeof CONST.MODAL.ANCHOR_ORIGIN_VERTICAL>;
+    shiftVertical?: number;
+};
+
+type AnchorPosition = {
+    horizontal: number;
+    vertical: number;
+};
+
+/**
+ * Gets the x,y position of the passed in component for the purpose of anchoring another component to it.
+ */
+export default function calculateAnchorPosition(anchorComponent: View, anchorOrigin?: AnchorOrigin): Promise<AnchorPosition> {
+    return new Promise((resolve) => {
+        if (!anchorComponent) {
+            return resolve({horizontal: 0, vertical: 0});
+        }
+        anchorComponent.measureInWindow((x, y, width, height) => {
+            if (anchorOrigin?.vertical === CONST.MODAL.ANCHOR_ORIGIN_VERTICAL.TOP && anchorOrigin?.horizontal === CONST.MODAL.ANCHOR_ORIGIN_HORIZONTAL.LEFT) {
+                return resolve({horizontal: x, vertical: y + height + (anchorOrigin?.shiftVertical ?? 0)});
+            }
+            return resolve({horizontal: x + width, vertical: y});
+        });
+    });
+}