iter(g43): select/menu/popover/image 的 Esc 接入统一弹层栈
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@@ -1,11 +1,13 @@
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import { effect, h, signal } from '@ui-arch/frame';
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import type { MenuItem, MenuProps } from './types.js';
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import { flip } from './position.js';
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import { pushOverlay } from './overlay.js';
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/*** 下拉菜单:触发器 + 自绘弹层,项支持禁用 / 危险 / 分隔线;点项 / 点外部 / Esc 关闭,↑↓ 环形导航 + Home/End 跳转 + 键入快跳 ***/
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export function menu(props: MenuProps): HTMLElement {
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// —— 状态集中声明 ——
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const open = signal(false); // 弹层开合
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let releaseEsc: (() => void) | null = null; // Esc 栈注销函数:展开期间占一层,收起即释放
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const place = signal<'top' | 'bottom'>('bottom'); // 实际生效方位:打开时按视口空间自动翻转
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const focusables: HTMLButtonElement[] = []; // 可聚焦项(跳过分隔线与禁用项),供键盘导航
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const labels: string[] = []; // 与 focusables 平行的条目文案,供键入快跳
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@@ -72,12 +74,6 @@ export function menu(props: MenuProps): HTMLElement {
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};
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root.addEventListener('keydown', (e: KeyboardEvent) => {
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if (e.key === 'Escape') {
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e.stopPropagation(); // 只关本层:不再冒泡去关外层的弹窗/抽屉
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open(false);
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trigger.focus(); // 收起后焦点回到触发器,键盘流不断
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return;
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}
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if (e.key === 'Home' && open()) { e.preventDefault(); focusables[0]?.focus(); return; } // Home 跳首项
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if (e.key === 'End' && open()) { e.preventDefault(); focusables[focusables.length - 1]?.focus(); return; } // End 跳末项
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if (e.key !== 'ArrowDown' && e.key !== 'ArrowUp') {
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@@ -100,7 +96,14 @@ export function menu(props: MenuProps): HTMLElement {
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open(false); // 点外部收起
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});
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effect(() => open()); // 建立依赖,保证开合信号生效
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effect(() => {
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if (open()) {
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releaseEsc ??= pushOverlay(() => { open(false); trigger.focus(); }); // 入 Esc 栈:与弹窗/抽屉共用同一套逐层关闭
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} else {
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releaseEsc?.();
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releaseEsc = null;
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}
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});
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effect(() => { if (open()) place(flip(trigger, pop, 'bottom')); }); // 每次打开重算方位:空间不足自动翻转
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return root;
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}
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