iter(g02): 新增 image 图片组件
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@@ -0,0 +1,37 @@
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import { h } from '@ui-arch/frame';
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import type { ImageProps } from './types.js';
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/*** 图片:缩略图展示,点击 / 回车打开遮罩大图预览(Esc 或点击遮罩关闭),样式只消费 --ua-* 令牌 ***/
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export function image(props: ImageProps): HTMLElement {
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const style = props.width ? `width:${props.width}px` : '';
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return h('img', {
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class: 'ua-image',
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src: props.src,
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alt: props.alt ?? '',
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style,
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tabindex: '0', // 可聚焦,键盘用户回车预览
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role: 'button',
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'aria-label': '预览图片',
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onclick: () => openViewer(props.src, props.alt),
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onkeydown: (e: KeyboardEvent) => e.key === 'Enter' && openViewer(props.src, props.alt),
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});
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}
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/*** 打开全屏遮罩预览层;关闭时自清理、解绑键盘并归还焦点 ***/
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function openViewer(src: string, alt?: string): void {
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const prev = document.activeElement as HTMLElement | null; // 焦点归还目标
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const mask = h(
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'div',
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{ class: 'ua-image-mask', role: 'dialog', 'aria-modal': 'true', 'aria-label': '图片预览' },
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h('img', { class: 'ua-image-full', src, alt: alt ?? '' }),
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);
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const close = () => {
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mask.remove(); // 卫语句式自清理:遮罩移除 + 键盘解绑 + 焦点归还
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document.removeEventListener('keydown', onKey);
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prev?.focus?.();
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};
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const onKey = (e: KeyboardEvent) => e.key === 'Escape' && close();
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mask.addEventListener('click', close);
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document.addEventListener('keydown', onKey);
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document.body.appendChild(mask);
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}
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@@ -15,6 +15,7 @@ export { card } from './card.js';
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export { badge } from './badge.js';
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export { tag } from './tag.js';
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export { avatar } from './avatar.js';
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export { image } from './image.js';
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export { alert } from './alert.js';
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export { toast, showToast } from './toast.js';
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export { tooltip } from './tooltip.js';
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@@ -233,6 +233,13 @@ export interface TagProps {
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onClose?: () => void; // 关闭回调(调用方自行从数据源移除该项)
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}
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/*** 图片入参 ***/
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export interface ImageProps {
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src: string; // 图片地址(缩略图与大图共用)
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alt?: string; // 替代文本;缺省空串
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width?: number; // 缩略图宽度像素,高度自适应;缺省走样式默认
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}
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/*** 提示条入参 ***/
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export interface AlertProps {
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message: string; // 提示内容
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