HIsheR
55 lines
3.6 KiB
TypeScript
55 lines
3.6 KiB
TypeScript
import { h } from '@ui-arch/frame';
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import type { JsonViewerProps } from './types.js';
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// 值类型归类：数组 / 对象算分支，其余算叶子（null 单独一类，避免被 typeof 报成 object）
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type JsonKind = 'array' | 'object' | 'string' | 'number' | 'boolean' | 'null';
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const kindOf = (v: unknown): JsonKind => (v === null ? 'null' : Array.isArray(v) ? 'array' : typeof v === 'object' ? 'object' : (typeof v as JsonKind));
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/*** 叶子值文案：字符串补引号，其余按字面；null 用灰字斜体在样式层区分 ***/
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function leafText(v: unknown): string {
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return typeof v === 'string' ? `"${v}"` : String(v);
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}
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/*** 分支摘要：收起时也要看得出里面有多少内容，否则无法判断值不值得展开 ***/
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function summaryOf(v: unknown): string {
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if (Array.isArray(v)) return `${v.length} 项`;
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const n = Object.keys(v as Record<string, unknown>).length; // 对象分支：按自有键计数
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return `${n} 个键`;
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}
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/*** JSON 树查看：按层折叠展示任意值，数组 / 对象可展开收起，叶子按类型着色；只读、不解析编辑 ***/
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export function jsonViewer(props: JsonViewerProps): HTMLElement {
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const rootLabel = props.rootLabel ?? 'root'; // 根标签：贴顶那一行的键名
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const openDepth = props.depth ?? 2; // 默认展开层数：2 层能看出一级结构又不至于刷屏
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const root = h('div', { class: 'ua-json', role: 'tree', 'aria-label': props.ariaLabel ?? 'JSON 数据' }) as HTMLDivElement;
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if (props.maxHeight !== undefined) root.style.maxHeight = `${props.maxHeight}px`; // 只在给了上限时才限高，缺省随内容
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/*** 单行渲染：分支行带开关与计数摘要，叶子行只带类型类名 ***/
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const row = (key: string, value: unknown, level: number, path: string): HTMLElement => {
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const kind = kindOf(value);
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const branch = kind === 'array' || kind === 'object';
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const label = h('span', { class: 'ua-json-key' }, key); // 键名：数组下标也用 key 位展示
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if (!branch) {
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return h('div', { class: 'ua-json-row is-leaf', role: 'treeitem' }, label, h('span', { class: 'ua-json-colon' }, ':'), h('span', { class: `ua-json-val ua-json-${kind}` }, leafText(value)));
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}
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const box = h('div', { class: 'ua-json-children', role: 'group' }); // 子节点容器：收起时整块隐藏，DOM 保留折叠态
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const caret = h('span', { class: 'ua-json-caret', 'aria-hidden': 'true' }, '▸'); // 开关图标：方向由 aria-expanded 决定样式
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const toggle = h('button', {
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type: 'button',
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class: 'ua-json-toggle',
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'aria-expanded': () => String(!box.hidden),
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'aria-label': () => `${box.hidden ? '展开' : '收起'} ${path}`,
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onClick: () => { box.hidden = !box.hidden; }, // 只翻 hidden：样式按 :has 或 aria-expanded 跟随
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}, caret, label, h('span', { class: 'ua-json-colon' }, ':'), h('span', { class: 'ua-json-sum' }, `${kind === 'array' ? '[' : '{'}${summaryOf(value)}${kind === 'array' ? ']' : '}'}`));
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const entries: [string, unknown][] = kind === 'array'
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? (value as unknown[]).map((v, i) => [String(i), v]) // 数组下标转字符串，走同一套行渲染
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: Object.entries(value as Record<string, unknown>);
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for (const [k, v] of entries) box.append(row(k, v, level + 1, `${path}.${k}`)); // 递归：路径用点号拼接，报给读屏时能定位
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box.hidden = level >= openDepth; // 超出默认层数的一律先收起，用户按需展开
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return h('div', { class: 'ua-json-branch', role: 'treeitem', 'aria-level': String(level + 1) }, toggle, box);
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};
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root.append(row(rootLabel, props.value, 0, rootLabel));
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return root;
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}
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