feat(Breadcrumbs): new component

src/components/lab/Breadcrumbs/BreadcrumbItem.tsx

@@ -0,0 +1,91 @@
+import React from 'react';
+
+import type {Href, RouterOptions} from '../../types';
+import {filterDOMProps} from '../../utils/filterDOMProps';
+
+import type {BreadcrumbsItemProps} from './Breadcrumbs';
+import {b, shouldClientNavigate} from './utils';
+
+interface BreadcrumbItemProps extends BreadcrumbsItemProps {
+    onAction?: () => void;
+    title?: string;
+    isCurrent?: boolean;
+    isMenu?: boolean;
+    disabled?: boolean;
+    navigate?: (href: Href, routerOptions: RouterOptions | undefined) => void;
+}
+export function BreadcrumbItem(props: BreadcrumbItemProps) {
+    const Element = props.href ? 'a' : 'span';
+    const domProps = filterDOMProps(props, {labelable: true});
+
+    let title = props.title;
+    if (!title && typeof props.children === 'string') {
+        title = props.children;
+    }
+
+    const handleAction = (event: React.MouseEvent | React.KeyboardEvent) => {
+        if (props.disabled || props.isCurrent) {
+            event.preventDefault();
+            return;
+        }
+
+        if (typeof props.onAction === 'function') {
+            props.onAction();
+        }
+
+        const target = event.currentTarget;
+        if (typeof props.navigate === 'function' && target instanceof HTMLAnchorElement) {
+            if (props.href && !event.isDefaultPrevented() && shouldClientNavigate(target, event)) {
+                event.preventDefault();
+                props.navigate(props.href, props.routerOptions);
+            }
+        }
+    };
+
+    const isDisabled = props.disabled || props.isCurrent;
+    let linkProps: React.AllHTMLAttributes<HTMLElement> = {
+        title,
+        onClick: handleAction,
+        'aria-disabled': isDisabled ? true : undefined,
+    };
+    if (Element === 'a') {
+        linkProps.href = props.href;
+        linkProps.target = props.target;
+        linkProps.rel = props.target === '_blank' && !props.rel ? 'noopener noreferrer' : props.rel;
+    } else {
+        linkProps.role = 'link';
+        linkProps.tabIndex = isDisabled ? undefined : 0;
+        linkProps.onKeyDown = (event: React.KeyboardEvent) => {
+            if (event.key === 'Enter') {
+                handleAction(event);
+            }
+        };
+    }
+
+    if (props.isCurrent) {
+        linkProps['aria-current'] = 'page';
+    }
+
+    if (props.isMenu) {
+        linkProps = {};
+    }
+
+    return (
+        <Element
+            {...domProps}
+            {...linkProps}
+            className={
+                props.isMenu
+                    ? undefined
+                    : b('link', {
+                          'is-current': props.isCurrent,
+                          'is-disabled': isDisabled && !props.isCurrent,
+                      })
+            }
+        >
+            {props.children}
+        </Element>
+    );
+}
+
+BreadcrumbItem.displayName = 'Breadcrumbs.Item';

src/components/lab/Breadcrumbs/Breadcrumbs.scss

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+@use '../../variables';
+@use '../../../../styles/mixins';
+
+$block: '.#{variables.$ns}breadcrumbs2';
+
+#{$block} {
+    &__list {
+        display: flex;
+        flex-wrap: nowrap;
+        justify-content: flex-start;
+
+        list-style-type: none;
+        margin: 0;
+        padding: 0;
+    }
+
+    &__list-item {
+        position: relative;
+        display: flex;
+        align-items: center;
+        justify-content: flex-start;
+
+        height: 24px;
+        white-space: nowrap;
+        color: var(--g-color-text-primary);
+
+        &:last-child {
+            font-weight: var(--g-text-accent-font-weight);
+            overflow: hidden;
+
+            #{$block}__link {
+                @include mixins.overflow-ellipsis();
+            }
+        }
+
+        &_calculating:last-child {
+            overflow: visible;
+        }
+    }
+
+    &__link {
+        cursor: default;
+        position: relative;
+        text-decoration: none;
+        outline: none;
+        touch-action: manipulation;
+        -webkit-tap-highlight-color: transparent;
+
+        height: 24px;
+        line-height: 24px;
+        vertical-align: middle;
+        padding: 0 var(--g-spacing-2);
+        border-radius: var(--g-focus-border-radius);
+
+        color: inherit;
+
+        &_is-disabled {
+            color: var(--g-color-text-hint);
+        }
+
+        &:not([aria-disabled]) {
+            cursor: pointer;
+
+            &:hover {
+                color: var(--g-color-text-link-hover);
+            }
+        }
+
+        &:focus-visible {
+            outline: 2px solid var(--g-color-line-focus);
+            outline-offset: -2px;
+        }
+    }
+
+    &__divider {
+        display: flex;
+        align-items: center;
+        color: var(--g-color-text-secondary);
+    }
+
+    &__more-button {
+        --g-button-border-radius: var(--g-focus-border-radius);
+        --g-button-focus-outline-offset: -2px;
+    }
+
+    &__popup_staircase {
+        $menu: '.#{variables.$ns}menu';
+        $staircaseLength: 10;
+        #{$menu} {
+            #{$menu}__list-item {
+                #{$menu}__item[class] {
+                    padding-inline-start: 8px * $staircaseLength;
+                }
+            }
+
+            @for $i from 0 through $staircaseLength {
+                #{$menu}__list-item:nth-child(#{$i}) {
+                    #{$menu}__item[class] {
+                        padding-inline-start: 8px * $i;
+                    }
+                }
+            }
+        }
+    }
+}