feat(AvatarStack): add component

CODEOWNERS

@@ -3,6 +3,7 @@
 /src/components/Alert @IsaevAlexandr
 /src/components/ArrowToggle @Marginy605
 /src/components/Avatar @DakEnviy
+/src/components/AvatarStack @ogonkov
 #/src/components/Breadcrumbs
 /src/components/Button @amje
 /src/components/Card @Lunory

package.json

@@ -108,7 +108,7 @@
         "lint": "run-p lint:*",
         "typecheck": "tsc --noEmit",
         "prepublishOnly": "npm run build && npm pkg delete engines",
-        "playwright:install": "playwright install --with-deps",
+        "playwright:install": "playwright install chromium webkit --with-deps",
         "playwright": "playwright test --config=playwright/playwright.config.ts",
         "playwright:update": "npm run playwright -- -u",
         "playwright:docker": "./scripts/playwright-docker.sh 'npm run playwright'",

src/components/AvatarStack/AvatarStack.scss

@@ -0,0 +1,61 @@
+@use '../../../styles/mixins';
+@use '../Avatar/variables' as avatar-variables;
+@use '../variables';
+
+$block: '.#{variables.$ns}avatar-stack';
+
+#{$block} {
+    --_--more-button-size: #{avatar-variables.$default-size};
+    --_--more-button-border-width: 1px;
+
+    display: inline-flex;
+    justify-content: flex-end;
+    flex-direction: row-reverse;
+
+    margin: 0;
+    padding: 0;
+
+    &_overlap-size_s {
+        --_--overlap: var(--g-spacing-1);
+    }
+
+    &_overlap-size_m {
+        --_--overlap: var(--g-spacing-2);
+    }
+
+    &_overlap-size_l {
+        --_--overlap: var(--g-spacing-3);
+    }
+
+    &__item {
+        display: flex;
+        z-index: 0;
+        border-radius: 100%;
+
+        &:not(:first-child) {
+            margin-inline-end: calc(-1 * var(--_--overlap));
+        }
+    }
+
+    &__more-button {
+        @include mixins.button-reset;
+
+        border-radius: 100%;
+
+        width: var(--_--more-button-size);
+        height: var(--_--more-button-size);
+
+        &:focus-visible {
+            outline: var(--g-color-line-focus) solid 2px;
+            outline-offset: 0;
+        }
+
+        &_size {
+            @each $size-name, $size-value in avatar-variables.$sizes {
+                &_#{$size-name} {
+                    --_--more-button-size: #{$size-value};
+                }
+            }
+        }
+    }
+}

src/components/AvatarStack/AvatarStack.tsx

@@ -0,0 +1,69 @@
+import React from 'react';
+
+import {Avatar} from '../Avatar';
+import {block} from '../utils/cn';
+
+import {AvatarStackItem} from './AvatarStackItem';
+import {AvatarStackMoreButton} from './AvatarStackMoreButton';
+import i18n from './i18n';
+import type {AvatarStackProps} from './types';
+
+import './AvatarStack.scss';
+
+const b = block('avatar-stack');
+
+const AvatarStackComponent = ({
+    max = 3,
+    overlapSize = 's',
+    size,
+    children,
+    className,
+    renderMore,
+}: AvatarStackProps) => {
+    const visibleItems: React.ReactElement[] = [];
+    let moreItems = 0;
+
+    React.Children.forEach(children, (child) => {
+        if (!React.isValidElement(child)) {
+            return;
+        }
+
+        const item = <AvatarStackItem key={visibleItems.length}>{child}</AvatarStackItem>;
+
+        if (visibleItems.length <= max) {
+            visibleItems.unshift(item);
+        } else {
+            moreItems += 1;
+        }
+    });
+
+    const hasMoreButton = moreItems > 0;
+    /** Avatars + more button, or just avatars, when avatars count is equal to `max` or less */
+    const normalOverflow = moreItems >= 1;
+
+    return (
+        // Safari remove role=list with some styles, applied to li items, so we need
+        // to restore role manually
+        // eslint-disable-next-line jsx-a11y/no-redundant-roles
+        <ul className={b({'overlap-size': overlapSize}, className)} role={'list'}>
+            {hasMoreButton ? (
+                <AvatarStackItem key="more-button">
+                    {renderMore ? (
+                        renderMore({count: moreItems})
+                    ) : (
+                        <Avatar
+                            text={`+${moreItems}`}
+                            aria-label={i18n('more', {count: moreItems})}
+                            size={size}
+                        />
+                    )}
+                </AvatarStackItem>
+            ) : null}
+            {normalOverflow ? visibleItems.slice(0, max) : visibleItems}
+        </ul>
+    );
+};
+
+AvatarStackComponent.displayName = 'AvatarStack';
+
+export const AvatarStack = Object.assign(AvatarStackComponent, {MoreButton: AvatarStackMoreButton});

src/components/AvatarStack/AvatarStackItem.tsx

@@ -0,0 +1,13 @@
+import React from 'react';
+
+import {block} from '../utils/cn';
+
+const b = block('avatar-stack');
+
+type Props = React.PropsWithChildren<{}>;
+
+export const AvatarStackItem = ({children}: Props) => {
+    return <li className={b('item')}>{children}</li>;
+};
+
+AvatarStackItem.displayName = 'AvatarStack.Item';

src/components/AvatarStack/AvatarStackMoreButton.tsx

@@ -0,0 +1,39 @@
+import React from 'react';
+
+import type {AvatarSize} from '../Avatar';
+import {Avatar, DEFAULT_AVATAR_SIZE} from '../Avatar';
+import {block} from '../utils/cn';
+
+import i18n from './i18n';
+
+const b = block('avatar-stack');
+
+export type AvatarStackMoreButtonProps = Pick<
+    React.HTMLProps<HTMLButtonElement>,
+    'className' | 'onClick' | 'aria-label'
+> & {
+    size?: AvatarSize;
+    count: number;
+};
+
+export const AvatarStackMoreButton = React.forwardRef<
+    HTMLButtonElement,
+    AvatarStackMoreButtonProps
+>(({className, size = DEFAULT_AVATAR_SIZE, onClick, count, 'aria-label': ariaLabel}, ref) => {
+    return (
+        <button
+            ref={ref}
+            type="button"
+            className={b('more-button', {size}, className)}
+            onClick={onClick}
+        >
+            <Avatar
+                text={`+${count}`}
+                size={size}
+                aria-label={ariaLabel || i18n('more', {count})}
+            />
+        </button>
+    );
+});
+
+AvatarStackMoreButton.displayName = 'AvatarStack.MoreButton';

src/components/AvatarStack/README.md

@@ -0,0 +1,52 @@
+<!--GITHUB_BLOCK-->
+
+# AvatarStack
+
+<!--/GITHUB_BLOCK-->
+
+```ts
+import {AvatarStack} from '@gravity-ui/uikit';
+```
+
+Stack of images with overlap over next image and optional control. This is usually users avatars.
+
+## Usage
+
+Component is not limit you to what components to render, basic usage is:
+
+```tsx
+<AvatarStack>
+  <Avatar imgUrl={`https://i.pravatar.cc/150?u=login1`} />
+  <Avatar imgUrl={`https://i.pravatar.cc/150?u=login2`} />
+  <Avatar imgUrl={`https://i.pravatar.cc/150?u=login3`} />
+</AvatarStack>
+```
+
+## Properties
+
+| Name        | Description                                                                                                                                                        |                        Type                        | Default |
+| :---------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------- | :------------------------------------------------: | :-----: |
+| max         | How much avatars should be visible before more button. If avatars count is only 1 short from `max`, than more button would be replaced with avatar.                |                      `number`                      |    3    |
+| overlapSize | How much each item should overlap next one. `s` recommended for `Avatar`'s of sizes `xs`-`m`, `m` recomended for `l` size avatars and `l` overlap for `xl` avatars |                   `s`, `m`, `l`                    |   `s`   |
+| size        | Size for control displaying extra avatars. Value same to `Avatar` size.                                                                                            |                    `AvatarSize`                    |         |
+| className   | Class name of root DOM node                                                                                                                                        |                      `string`                      |         |
+| children    | List of avatars, probably with some extra wrappers                                                                                                                 |                     `Object[]`                     |         |
+| renderMore  | Custom render for control displaying extra avatars                                                                                                                 | `function(options: {count: number}): ReactElement` |         |
+
+### AvatarStack.MoreButton
+
+Component for overriding more button
+
+```tsx
+<AvatarStack
+  renderMore={({count}) => (
+    <Tooltip content={'More users'}>
+      <AvatarStack.MoreButton count={count} />
+    </Tooltip>
+  )}
+>
+  <Avatar imgUrl={`https://i.pravatar.cc/150?u=login1`} />
+  <Avatar imgUrl={`https://i.pravatar.cc/150?u=login2`} />
+  <Avatar imgUrl={`https://i.pravatar.cc/150?u=login3`} />
+</AvatarStack>
+```

src/components/AvatarStack/__tests__/AvatarStack.visual.test.tsx

@@ -0,0 +1,25 @@
+import React from 'react';
+
+import {test} from '~playwright/core';
+
+import {AvatarStackStories} from './stories';
+
+test.describe('AvatarStack', () => {
+    test('render story <SingleItem>', async ({mount, expectScreenshot}) => {
+        await mount(<AvatarStackStories.SingleItem randomAvatar={false} />);
+
+        await expectScreenshot();
+    });
+
+    test('render story <MoreButton>', async ({mount, expectScreenshot}) => {
+        await mount(<AvatarStackStories.MoreButton randomAvatar={false} />);
+
+        await expectScreenshot();
+    });
+
+    test('render story <MoreButtonOmit>', async ({mount, expectScreenshot}) => {
+        await mount(<AvatarStackStories.MoreButtonOmit randomAvatar={false} />);
+
+        await expectScreenshot();
+    });
+});

src/components/AvatarStack/__tests__/stories.ts

@@ -0,0 +1,5 @@
+import {composeStories} from '@storybook/react';
+
+import * as CSFStories from '../__stories__/AvatarStack.stories';
+
+export const AvatarStackStories = composeStories(CSFStories);

src/components/AvatarStack/i18n/en.json

@@ -0,0 +1,3 @@
+{
+  "more": ["and {{count}} more", "and {{count}} more", "and {{count}} more"]
+}

src/components/AvatarStack/i18n/index.ts

@@ -0,0 +1,8 @@
+import {addComponentKeysets} from '../../utils/addComponentKeysets';
+
+import en from './en.json';
+import ru from './ru.json';
+
+const COMPONENT = 'AvatarStack';
+
+export default addComponentKeysets({en, ru}, COMPONENT);

src/components/AvatarStack/i18n/ru.json

@@ -0,0 +1,3 @@
+{
+  "more": ["И eщё {{count}}", "И eщё {{count}}", "И eщё {{count}}"]
+}

src/components/AvatarStack/index.ts

@@ -0,0 +1,2 @@
+export {AvatarStack} from './AvatarStack';
+export type {AvatarStackProps, AvatarStackOverlapSize} from './types';

src/components/AvatarStack/types.ts

@@ -0,0 +1,41 @@
+import type React from 'react';
+
+import type {AvatarSize} from '../Avatar';
+
+export type AvatarStackOverlapSize = 's' | 'm' | 'l';
+
+export interface AvatarStackProps {
+    /** Amount of avatars to be shown before more button. Default 3. */
+    max?: number;
+    /**
+     * How much each avatar should overlap next one
+     * | Avatar sizes | Recommended overlap |
+     * | :----------: | :-----------------: |
+     * | `xs`-`m`     | `s`                 |
+     * | `l`          | `m`                 |
+     * | `xl`         | `l`                 |
+     */
+    overlapSize?: AvatarStackOverlapSize;
+    /**
+     * Size for control displaying count of extra avatars
+     */
+    size?: AvatarSize;
+    className?: string;
+    /**
+     * Children would be wrapped for "stacking"
+     * @example
+     * <AvatarStack>
+     *     <Avatar/>
+     *     <Tooltip content="Some info"><Avatar/></Tooltip>
+     * </AvatarStack>
+     */
+    children?: React.ReactNode;
+    /**
+     * Custom render for control displaying extra data
+     * @example
+     * <AvatarStack renderMore={({count}) => <Button>+{count}</Button>}>
+     *     <Avatar/>
+     * </AvatarStack>
+     */
+    renderMore?: (options: {count: number}) => React.ReactElement;
+}

src/components/index.ts

@@ -19,6 +19,7 @@ export * from './Divider';
 export * from './DropdownMenu';
 export * from './Hotkey';
 export * from './Icon';
+export * from './AvatarStack';
 export * from './Label';
 export * from './Link';
 export * from './List';