feat(fuselage): Component Dropdown (#594)

Co-authored-by: juliajforesti <[email protected]>

packages/fuselage-hooks/src/usePosition.ts

@@ -51,18 +51,24 @@ type VariantBoundaries = {
 };
 
 type PositionStyle = {
-  top?: string;
-  left?: string;
+  top: string;
+  left: string;
   position?: 'fixed';
-  zIndex?: '9999';
-  transition?: 'none !important';
-  opacity?: 0 | 1;
+  ZIndex: '9999';
+  transition: 'none !important';
   bottom?: 0;
-  display?: 'flex';
+  display: 'flex';
+};
+
+type PositionEmptyResult = {
+  visibility: 'hidden';
+  top: '-9999px';
+  left: '-9999px';
+  position: 'fixed';
 };
 
 type PositionResult = {
-  style?: PositionStyle;
+  style: PositionStyle | PositionEmptyResult;
   placement?: Placements;
 };
 
@@ -89,6 +95,15 @@ const fallbackOrder = {
   left: 'lrbt',
 } as const;
 
+const emptyStyle: PositionResult = {
+  style: {
+    position: 'fixed',
+    visibility: 'hidden',
+    top: '-9999px',
+    left: '-9999px',
+  },
+};
+
 const getParents = function (element: Element): Array<Element | Window> {
   // Set up a parent array
   const parents = [];
@@ -148,7 +163,7 @@ export const getPositionStyle = ({
   margin?: number;
 }): PositionResult => {
   if (!targetBoundaries) {
-    return {};
+    return emptyStyle;
   }
 
   const { top, left, bottom, right } = container;
@@ -222,8 +237,7 @@ export const getPositionStyle = ({
         bottom: margin,
         display: 'flex',
       }),
-      zIndex: '9999',
-      opacity: 1,
+      ZIndex: '9999',
     },
     placement: `${PlacementMap[placementAttempt]}-${
       PlacementMap[variantsAttempts[0]]
@@ -274,9 +288,9 @@ export const getVariantBoundaries = ({
  * @public
  */
 
-export const usePosition = (
-  reference: RefObject<Element>,
-  target: RefObject<Element>,
+export const usePosition = <T extends Element, R extends Element>(
+  reference: RefObject<R>,
+  target: RefObject<T>,
   options: PositionOptions
 ): PositionResult => {
   const {
@@ -287,7 +301,7 @@ export const usePosition = (
   } = options;
   const container = useRef(containerElement);
 
-  const [style, setStyle] = useDebouncedState<PositionResult>({}, 10);
+  const [style, setStyle] = useDebouncedState<PositionResult>(emptyStyle, 10);
 
   const callback = useMutableCallback(() => {
     const boundaries = target.current.getBoundingClientRect();
@@ -315,6 +329,5 @@ export const usePosition = (
   useBoundingClientRect(target, watch, callback);
   useBoundingClientRect(reference, watch, callback);
   useBoundingClientRect(container, watch, callback);
-
   return style;
 };

packages/fuselage/src/components/Dropdown/Dropdown.stories.tsx

@@ -0,0 +1,37 @@
+import React, { useRef } from 'react';
+
+import { ActionButton, Box } from '..';
+import Option from '../Options/Option/Option';
+import { Dropdown } from './Dropdown';
+
+export default {
+  title: 'Dropdown/Dropdown',
+  component: Dropdown,
+  parameters: {
+    jest: ['Dropdown.spec.tsx'],
+  },
+};
+
+export const Default = () => {
+  const anchor = useRef(null);
+  const target = useRef(null);
+
+  const list = Array.from(new Array(20));
+
+  return (
+    <Box
+      w='400px'
+      h='500px'
+      display='flex'
+      justifyContent='center'
+      alignItems='center'
+    >
+      <ActionButton ref={anchor} icon='doner' />
+      <Dropdown ref={target} reference={anchor} placement='bottom-end'>
+        {list.map((_, i) => (
+          <Option>Example {i + 1}</Option>
+        ))}
+      </Dropdown>
+    </Box>
+  );
+};

packages/fuselage/src/components/Dropdown/Dropdown.tsx

@@ -0,0 +1,34 @@
+import { useMediaQuery, usePosition } from '@rocket.chat/fuselage-hooks';
+import React, { forwardRef, ReactNode, Ref, RefObject } from 'react';
+
+import { DropdownDesktop } from './DropdownDesktop';
+import { DropdownMobile } from './DropdownMobile';
+
+export const Dropdown = forwardRef(function Dropdown<
+  T extends HTMLElement,
+  R extends HTMLElement
+>(
+  {
+    children,
+    reference,
+    placement = 'bottom-start',
+  }: {
+    reference: RefObject<T>;
+    placement?: Parameters<typeof usePosition>[2]['placement'];
+    children: ReactNode;
+  },
+  ref: Ref<R>
+) {
+  const notSmall = useMediaQuery('(min-width: 500px)');
+
+  return notSmall ? (
+    <DropdownDesktop
+      reference={reference}
+      children={children}
+      placement={placement}
+      ref={ref}
+    />
+  ) : (
+    <DropdownMobile children={children} ref={ref} />
+  );
+});

packages/fuselage/src/components/Dropdown/DropdownDesktop.tsx

@@ -0,0 +1,39 @@
+import { usePosition } from '@rocket.chat/fuselage-hooks';
+import React, { forwardRef, ReactNode, Ref, RefObject } from 'react';
+
+import { Box, Tile } from '..';
+
+export const DropdownDesktop = forwardRef(function DropdownDesktop<
+  T extends HTMLElement,
+  R extends HTMLElement
+>(
+  {
+    children,
+    reference,
+    placement = 'bottom-start',
+  }: {
+    reference: RefObject<T>;
+    placement?: Parameters<typeof usePosition>[2]['placement'];
+    children: ReactNode;
+  },
+  ref: Ref<R>
+) {
+  const { style } = usePosition(reference, ref as RefObject<R>, { placement });
+
+  return (
+    <Tile
+      style={style}
+      ref={ref}
+      elevation='2'
+      pi='0'
+      pb='0'
+      display='flex'
+      flexDirection='column'
+      overflow='auto'
+    >
+      <Box flexShrink={1} pb='x16'>
+        {children}
+      </Box>
+    </Tile>
+  );
+});

packages/fuselage/src/components/Dropdown/DropdownMobile.tsx

@@ -0,0 +1,35 @@
+import React, { forwardRef, ReactNode, Ref } from 'react';
+
+import { Box, Tile } from '..';
+
+export const DropdownMobile = forwardRef(function DropdownMobile<
+  R extends HTMLElement
+>(
+  {
+    children,
+  }: {
+    children: ReactNode;
+  },
+  ref: Ref<R>
+) {
+  return (
+    <Tile
+      ref={ref}
+      elevation='2'
+      pi='0'
+      pb='0'
+      w='100%'
+      maxHeight='80%'
+      position='fixed'
+      display='flex'
+      flexDirection='column'
+      overflow='auto'
+      style={{ bottom: 0, left: 0 }}
+      zIndex={2}
+    >
+      <Box flexShrink={1} pb='x16'>
+        {children}
+      </Box>
+    </Tile>
+  );
+});

packages/fuselage/src/components/Dropdown/index.tsx

@@ -0,0 +1 @@
+export * from './Dropdown';

packages/fuselage/src/components/index.ts

@@ -11,6 +11,7 @@ export * from './CheckBox';
 export * from './Chevron';
 export { default as Chip } from './Chip';
 export * from './Divider';
+export * from './Dropdown';
 export * from './EmailInput';
 export * from './Field';
 export * from './FieldGroup';