RolePicker: Improve overlay positioning (#92590)

* RolePicker: Improve overlay positioning

* Fix vertical position

* More fixes

public/app/core/components/RolePicker/RolePicker.tsx

@@ -5,7 +5,12 @@ import { Role, OrgRole } from 'app/types';
 
 import { RolePickerInput } from './RolePickerInput';
 import { RolePickerMenu } from './RolePickerMenu';
-import { MENU_MAX_HEIGHT, ROLE_PICKER_MAX_MENU_WIDTH, ROLE_PICKER_WIDTH } from './constants';
+import {
+  MENU_MAX_HEIGHT,
+  ROLE_PICKER_MAX_MENU_WIDTH,
+  ROLE_PICKER_MENU_MAX_WIDTH,
+  ROLE_PICKER_WIDTH,
+} from './constants';
 
 export interface Props {
   basicRole?: OrgRole;
@@ -79,39 +84,38 @@ export const RolePicker = ({
       return {};
     }
     const { bottom, top, left, right } = dimensions;
+
+    const spaceBelow = window.innerHeight - bottom;
+    const spaceAbove = top;
+    const spaceRight = window.innerWidth - right;
+    const spaceLeft = left;
+
     let horizontal = left;
+    let vertical = bottom;
     let menuToLeft = false;
+    let menuToTop = false;
 
-    const distance = window.innerHeight - bottom;
+    // Check vertical space
-    let vertical = bottom + 5;
+    if (spaceBelow < MENU_MAX_HEIGHT && spaceAbove > spaceBelow) {
-    let ToTheSide = false;
+      vertical = top - MENU_MAX_HEIGHT;
-    if (distance < MENU_MAX_HEIGHT + 20) {
+      menuToTop = true;
-      // move the menu above the input if there is not enough space below
-      vertical = top - MENU_MAX_HEIGHT - 50;
-    }
-
-    // check if there is enough space above the input field
-    if (top < MENU_MAX_HEIGHT + 50) {
-      // if not, reset the vertical position
-      vertical = top;
-      // move the menu to the right edge of the input field
-      horizontal = right + 5;
-      // flag to align the menu to the right or left edge of the input field
-      ToTheSide = true;
     }
 
-    /*
+    // Check horizontal space
-     * This expression calculates whether there is enough place
+    if (spaceRight < ROLE_PICKER_MENU_MAX_WIDTH && spaceLeft < ROLE_PICKER_MENU_MAX_WIDTH) {
-     * on the right of the RolePicker input to show/fit the role picker menu and its sub menu AND
+      horizontal = right - ROLE_PICKER_MENU_MAX_WIDTH;
-     * whether there is enough place under the RolePicker input to show/fit
-     * both (the role picker menu and its sub menu) aligned to the left edge of the input.
-     * Otherwise, it aligns the role picker menu to the right.
-     */
-    if (horizontal + ROLE_PICKER_MAX_MENU_WIDTH > window.innerWidth) {
-      horizontal = window.innerWidth - (ToTheSide ? left : right);
       menuToLeft = true;
+    } else {
+      horizontal = Math.max(0, left + (dimensions.width - ROLE_PICKER_MENU_MAX_WIDTH) / 2);
     }
 
+    // Ensure the menu stays within the viewport
+    horizontal = Math.max(0, Math.min(horizontal, window.innerWidth - ROLE_PICKER_MAX_MENU_WIDTH));
+    vertical = Math.max(0, Math.min(vertical, window.innerHeight - MENU_MAX_HEIGHT));
+    if (menuToTop) {
+      // Adjust vertical position to align with the input
+      vertical -= 48;
+    }
     return { horizontal, vertical, menuToLeft };
   };