Chore: replace `react-popper` with `@floating-ui/react` in `DataSourcePicker` (#82528)

* replace react-popper with floating-ui in DataSourcePicker

* don't need {force:true}

e2e/various-suite/exemplars.spec.ts

@@ -10,7 +10,7 @@ const addDataSource = () => {
       e2e.components.DataSource.Prometheus.configPage.exemplarsAddButton().click();
       e2e.components.DataSource.Prometheus.configPage.internalLinkSwitch().check({ force: true });
       e2e.components.DataSource.Prometheus.configPage.connectionSettings().type('http://prom-url:9090');
-      e2e.components.DataSourcePicker.inputV2().click({ force: true }).should('have.focus');
+      e2e.components.DataSourcePicker.inputV2().click().should('have.focus');
 
       cy.contains('gdev-tempo').scrollIntoView().should('be.visible').click();
     },

public/app/features/datasources/components/picker/DataSourcePicker.tsx

@@ -1,9 +1,9 @@
 import { css } from '@emotion/css';
+import { autoUpdate, flip, offset, shift, size, useFloating } from '@floating-ui/react';
 import { useDialog } from '@react-aria/dialog';
 import { FocusScope } from '@react-aria/focus';
 import { useOverlay } from '@react-aria/overlays';
 import React, { useCallback, useEffect, useRef, useState } from 'react';
-import { usePopper } from 'react-popper';
 import { Observable } from 'rxjs';
 
 import { DataSourceInstanceSettings, GrafanaTheme2 } from '@grafana/data';
@@ -21,7 +21,6 @@ import { useDatasource } from '../../hooks';
 import { DataSourceList } from './DataSourceList';
 import { DataSourceLogo, DataSourceLogoPlaceHolder } from './DataSourceLogo';
 import { DataSourceModal } from './DataSourceModal';
-import { applyMaxSize, maxSize } from './popperModifiers';
 import { dataSourceLabel, matchDataSourceWithSearch } from './utils';
 
 const INTERACTION_EVENT_NAME = 'dashboards_dspicker_clicked';
@@ -81,8 +80,6 @@ export function DataSourcePicker(props: DataSourcePickerProps) {
 
   // Used to position the popper correctly and to bring back the focus when navigating from footer to input
   const [markerElement, setMarkerElement] = useState<HTMLInputElement | null>();
-  // Used to position the popper correctly
-  const [selectorElement, setSelectorElement] = useState<HTMLDivElement | null>();
   // Used to move the focus to the footer when tabbing from the input
   const [footerRef, setFooterRef] = useState<HTMLElement | null>();
   const currentDataSourceInstanceSettings = useDatasource(current);
@@ -91,20 +88,43 @@ export function DataSourcePicker(props: DataSourcePickerProps) {
   const prefixIcon =
     filterTerm && isOpen ? <DataSourceLogoPlaceHolder /> : <DataSourceLogo dataSource={currentValue} />;
 
-  const popper = usePopper(markerElement, selectorElement, {
+  // the order of middleware is important!
-    placement: 'bottom-start',
+  const middleware = [
-    modifiers: [
+    offset(4),
-      {
+    size({
-        name: 'offset',
+      apply({ availableHeight, elements }) {
-        options: {
+        const margin = 20;
-          offset: [0, 4],
+        const minSize = 200;
-        },
+        elements.floating.style.maxHeight = `${Math.max(minSize, availableHeight - margin)}px`;
+        elements.floating.style.minHeight = `${minSize}px`;
       },
-      maxSize,
+    }),
-      applyMaxSize,
+    flip({
-    ],
+      fallbackStrategy: 'initialPlacement',
+      // see https://floating-ui.com/docs/flip#combining-with-shift
+      crossAxis: false,
+      boundary: document.body,
+    }),
+    shift(),
+  ];
+
+  const { refs, floatingStyles } = useFloating({
+    open: isOpen,
+    placement: 'bottom-start',
+    onOpenChange: setOpen,
+    middleware,
+    whileElementsMounted: autoUpdate,
+    strategy: 'fixed',
   });
 
+  const handleReference = useCallback(
+    (element: HTMLInputElement | null) => {
+      refs.setReference(element);
+      setMarkerElement(element);
+    },
+    [refs]
+  );
+
   const onClose = useCallback(() => {
     setFilterTerm('');
     setOpen(false);
@@ -215,7 +235,7 @@ export function DataSourcePicker(props: DataSourcePickerProps) {
             openDropdown();
             setFilterTerm(e.currentTarget.value);
           }}
-          ref={setMarkerElement}
+          ref={handleReference}
           disabled={disabled}
         ></Input>
       </div>
@@ -225,9 +245,8 @@ export function DataSourcePicker(props: DataSourcePickerProps) {
           <div ref={ref} {...overlayProps} {...dialogProps}>
             <PickerContent
               {...restProps}
-              {...popper.attributes.popper}
+              style={floatingStyles}
-              style={popper.styles.popper}
+              ref={refs.setFloating}
-              ref={setSelectorElement}
               footerRef={setFooterRef}
               current={currentValue}
               filterTerm={filterTerm}

public/app/features/datasources/components/picker/popperModifiers.ts

@@ -1,42 +0,0 @@
-import { detectOverflow, Modifier, ModifierArguments } from '@popperjs/core';
-
-const MODAL_MARGIN = 20;
-const FLIP_THRESHOLD = 200;
-
-export const maxSize: Modifier<'maxSize', {}> = {
-  name: 'maxSize',
-  enabled: true,
-  phase: 'main',
-  requires: ['offset', 'preventOverflow', 'flip'],
-  fn({ state, name, options }: ModifierArguments<{}>) {
-    const overflow = detectOverflow(state, options);
-    const { x, y } = state.modifiersData.preventOverflow || { x: 0, y: 0 };
-    const { width: contentW, height: contentH } = state.rects.popper;
-    const { width: triggerW } = state.rects.reference;
-    const [basePlacement] = state.placement.split('-');
-
-    const widthProp = basePlacement === 'left' ? 'left' : 'right';
-    const heightProp = basePlacement === 'top' ? 'top' : 'bottom';
-
-    state.modifiersData[name] = {
-      maxWidth: contentW - overflow[widthProp] - x,
-      maxHeight: contentH - overflow[heightProp] - y,
-      minWidth: triggerW,
-    };
-  },
-};
-
-export const applyMaxSize: Modifier<'applyMaxSize', {}> = {
-  name: 'applyMaxSize',
-  enabled: true,
-  phase: 'beforeWrite',
-  requires: ['maxSize'],
-  fn({ state }: ModifierArguments<{}>) {
-    const { maxHeight, maxWidth, minWidth } = state.modifiersData.maxSize;
-
-    state.styles.popper.maxHeight ??= `${maxHeight - MODAL_MARGIN}px`;
-    state.styles.popper.minHeight ??= `${FLIP_THRESHOLD}px`;
-    state.styles.popper.maxWidth ??= maxWidth;
-    state.styles.popper.minWidth ??= minWidth;
-  },
-};