iter(g46): 新增 transfer 穿梭框组件

2026-10-26 12:08:24 +08:00
parent a650b6d91e
commit 1fe76e26b5
12 changed files with 398 additions and 10 deletions
@@ -44,3 +44,4 @@ export { modal } from './modal.js';
 export { drawer } from './drawer.js';
 export { form, formItem } from './form.js';
 export { dataTable } from './dataTable.js';
+export { transfer } from './transfer.js';
@@ -0,0 +1,113 @@
+import { effect, h, signal } from '@ui-arch/frame';
+import type { Signal } from '@ui-arch/frame';
+import { button } from './button.js';
+import type { TransferItem, TransferProps } from './types.js';
+
+/*** 单栏句柄：容器 / 列表 / 计数 / 全选框，供同步函数统一刷新 ***/
+interface Pane {
+  root: HTMLElement;     // 栏容器
+  list: HTMLElement;     // 条目滚动区
+  foot: HTMLElement;     // 底部计数
+  all: HTMLInputElement; // 全选框（支持半选三态）
+}
+
+/*** 穿梭框：左右两栏勾选后整体搬运，targetKeys 信号双向绑定，搜索词逐栏过滤、行内不重建保住焦点 ***/
+export function transfer(props: TransferProps): HTMLElement {
+  // —— 状态集中声明 ——
+  const sides: ['left', 'right'] = ['left', 'right']; // 固定两栏，避免各处手写左右字符串
+  const target: Signal<string[]> = props.targetKeys ?? signal<string[]>([]); // 右侧集合：外部受控优先
+  const picks = { left: signal<string[]>([]), right: signal<string[]>([]) } as Record<'left' | 'right', Signal<string[]>>; // 两栏勾选 key
+  const queries = { left: signal(''), right: signal('') } as Record<'left' | 'right', Signal<string>>; // 两栏搜索词
+  const boxes = { left: new Map<string, HTMLInputElement>(), right: new Map<string, HTMLInputElement>() } as Record<'left' | 'right', Map<string, HTMLInputElement>>; // key → 勾选框，回填用
+  const sigs = { left: '', right: '' } as Record<'left' | 'right', string>; // 上次渲染的条目签名，变化才重建行
+  const panes = {} as Record<'left' | 'right', Pane>; // 两栏句柄，建栏后填充
+  const titles = props.titles ?? ['待选列表', '已选列表']; // 栏标题
+  const searchable = props.searchable !== false; // 缺省开启搜索
+
+  /*** 归属判定：key 在右侧集合里即算已选 ***/
+  const isTarget = (key: string): boolean => target().includes(key);
+
+  /*** 按归属 + 搜索词筛出本栏可见条目，顺序沿用 dataSource ***/
+  const visible = (sd: 'left' | 'right'): TransferItem[] => {
+    const q = queries[sd]().trim().toLowerCase(); // 大小写不敏感的包含匹配
+    return props.dataSource.filter((it) => (sd === 'right' ? isTarget(it.key) : !isTarget(it.key)) && (q ? it.label.toLowerCase().includes(q) : true));
+  };
+
+  /*** 搬移：把源栏勾选整体送入目标栏，搬完清空两栏勾选并回传 ***/
+  const move = (dir: 'right' | 'left'): void => {
+    const from = dir === 'right' ? picks.left() : picks.right(); // 源栏勾选
+    if (!from.length) return; // 卫语句：没勾选不动作
+    const set = new Set(target());
+    for (const key of from) dir === 'right' ? set.add(key) : set.delete(key);
+    target([...set]);
+    picks.left([]); // 搬运后两栏勾选都清空，避免误操作
+    picks.right([]);
+    props.onChange?.([...set]);
+  };
+
+  /*** 重建某栏条目行：仅在归属或搜索词变化时调用，勾选态变化不重建以保住焦点 ***/
+  const renderRows = (sd: 'left' | 'right', items: TransferItem[]): void => {
+    const map = boxes[sd];
+    map.clear();
+    const rows = items.map((it) => {
+      const box = h('input', { type: 'checkbox', class: 'ua-transfer-box' }) as HTMLInputElement;
+      box.disabled = it.disabled === true; // 禁用条目：原生勾选框即不可点
+      box.addEventListener('change', () => {
+        const set = new Set(picks[sd]());
+        box.checked ? set.add(it.key) : set.delete(it.key); // 用户操作写回信号
+        picks[sd]([...set]);
+      });
+      map.set(it.key, box);
+      const row = h('li', { class: 'ua-transfer-item' }, h('label', { class: 'ua-transfer-label' }, box, h('span', {}, it.label)));
+      if (it.disabled) row.classList.add('is-disabled');
+      return row;
+    });
+    panes[sd].list.replaceChildren(...rows);
+    if (!rows.length) panes[sd].list.append(h('li', { class: 'ua-transfer-empty' }, '无匹配条目')); // 空态兜底
+  };
+
+  /*** 造一栏：标题 + 全选 + 搜索 + 列表 + 计数 ***/
+  const makePane = (sd: 'left' | 'right'): Pane => {
+    const all = h('input', { type: 'checkbox', class: 'ua-transfer-all', 'aria-label': `全选${titles[sd === 'left' ? 0 : 1]}` }) as HTMLInputElement;
+    all.addEventListener('change', () => {
+      const keys = visible(sd).filter((it) => !it.disabled).map((it) => it.key); // 禁用条目不参与全选
+      const set = new Set(picks[sd]());
+      keys.forEach((k) => (all.checked ? set.add(k) : set.delete(k)));
+      picks[sd]([...set]);
+    });
+    const search = searchable ? (h('input', { type: 'search', class: 'ua-transfer-search', placeholder: '搜索条目', 'aria-label': `搜索${titles[sd === 'left' ? 0 : 1]}` }) as HTMLInputElement) : null;
+    search?.addEventListener('input', () => queries[sd](search.value));
+    const list = h('ul', { class: 'ua-transfer-list', role: 'group', 'aria-label': titles[sd === 'left' ? 0 : 1] }) as HTMLElement;
+    if (props.height) list.style.height = `${props.height}px`; // 固定高度，超出滚动
+    const foot = h('div', { class: 'ua-transfer-foot' });
+    const root = h('div', { class: 'ua-transfer-pane' }, h('div', { class: 'ua-transfer-head' }, h('span', { class: 'ua-transfer-title' }, titles[sd === 'left' ? 0 : 1]), all), search, list, foot) as HTMLElement;
+    return { root, list, foot, all };
+  };
+
+  /*** 全量刷新：按需重建行 + 回填勾选态 + 全选三态 + 计数 ***/
+  const sync = (): void => {
+    for (const sd of sides) {
+      const pane = panes[sd];
+      if (!pane) continue; // 卫语句：首绘时另一栏还没建好
+      const items = visible(sd);
+      const sig = items.map((it) => it.key).join('|');
+      if (sig !== sigs[sd]) { sigs[sd] = sig; renderRows(sd, items); } // 条目集合变了才重建
+      const picked = new Set(picks[sd]());
+      for (const [key, box] of boxes[sd]) box.checked = picked.has(key);
+      const usable = items.filter((it) => !it.disabled).length; // 可勾选条数（全选基数）
+      pane.all.checked = usable > 0 && picked.size >= usable;
+      pane.all.indeterminate = picked.size > 0 && picked.size < usable; // 半选：部分勾选
+      pane.foot.textContent = `已勾选 ${picked.size} / 共 ${items.length} 条`;
+    }
+  };
+
+  panes.left = makePane('left');
+  panes.right = makePane('right');
+  // 中间操作列：两个方向按钮，无勾选时禁用（信号驱动，零手动同步）
+  const toRight = button({ label: '→', variant: 'ghost', disabled: () => !picks.left().length, onClick: () => move('right') });
+  const toLeft = button({ label: '←', variant: 'ghost', disabled: () => !picks.right().length, onClick: () => move('left') });
+  const ops = h('div', { class: 'ua-transfer-ops' }, h('span', { class: 'ua-transfer-ops-hint' }, '移动'), toRight, toLeft);
+
+  effect(sync);
+  return h('div', { class: 'ua-transfer' }, panes.left.root, ops, panes.right.root) as HTMLElement;
+}
@@ -478,4 +478,21 @@ export interface CarouselProps {
  onChange?: (index: number) => void; // 切换回调（点击/箭头/键盘/自动都触发）
 }

+/*** 穿梭框条目 ***/
+export interface TransferItem {
+  key: string;        // 唯一键：左右搬运按 key 记，不记下标
+  label: string;      // 显示文案
+  disabled?: boolean; // 禁用：不可勾选、不参与全选、不参与搬运
+}
+
+/*** 穿梭框入参 ***/
+export interface TransferProps {
+  dataSource: TransferItem[];          // 全量条目：左右两栏都由它按归属派生
+  targetKeys?: Signal<string[]>;       // 右侧集合信号；不传则组件内部维护
+  titles?: [string, string];           // 左右栏标题；缺省「待选列表 / 已选列表」
+  searchable?: boolean;                // 是否显示搜索框；缺省 true
+  height?: number;                     // 列表区固定高度像素；缺省走样式表 220
+  onChange?: (keys: string[]) => void; // 右侧集合变化回调（搬运后触发，传副本）
+}
+
 export type { ColumnDef, RowKey }; // 再导出常用内核类型，方便调用方