---
title: "WordNav 组件 — zenit Zig UI"
description: "跨文字系统的按词移动光标。按词跳转遵循 Unicode 词边界，跨越希腊文、西里尔文与 emoji。"
url: https://zenit.z.express/zh/components/wordnav
language: zh-CN
alternate_en: https://zenit.z.express/components/wordnav.md
alternate_es: https://zenit.z.express/es/components/wordnav.md
alternate_ja: https://zenit.z.express/ja/components/wordnav.md
alternate_ko: https://zenit.z.express/ko/components/wordnav.md
alternate_fr: https://zenit.z.express/fr/components/wordnav.md
alternate_de: https://zenit.z.express/de/components/wordnav.md
project: zenit v0.1.0-alpha (Zig 0.15.2, macOS)
source: https://github.com/version-next/zenit
---

# WordNav

`ui.widgets.Textarea`

跨文字系统的按词移动光标。

[Video](https://zenit.z.express/media/stories/wordnav.mp4?v=1fd0aa8709)

**BEHAVIOR CONTRACT**

按词跳转遵循 Unicode 词边界，跨越希腊文、西里尔文与 emoji。

**RECORDED INTERACTION**

Harness 在文本框内按 ⌥← 逐词移动。

`examples/storybook/stories.zig:4575`

```zig
pub fn buildWordNav(scope: *ui.Scope, cx: *ui.Cx) anyerror!*ui.Node {
    const a = cx.allocator;
    const c = try col(cx, 12);
    try c.appendChild(a, try label(cx, "Word navigation — Alt+←/→ jumps whole Greek/Cyrillic words; double-click selects the word; family emoji is one cluster"));

    const ta = try W.Textarea(.{
        .label_text = "Mixed-script sample",
        .value = WORDNAV_TEXT,
        .rows = 3,
        .width = 560,
    }).mount(scope, cx);
    ta.meta.ownership.meta.test_id = "story.wordnav.ta";
    try c.appendChild(a, ta);

    try c.appendChild(a, try label(cx, "Expected Alt+Right stops (byte offsets): 7 14 27 34 40 46 72 75"));
    return c;
}
```

[在 GitHub 查看源码examples/storybook/stories.zig:4575](https://github.com/version-next/zenit/blob/HEAD/examples/storybook/stories.zig#L4575)

这是 Storybook 中该 story 的原样代码（zenit 5f9add5+wip 2026-09-30）。其中 `W` 即 `ui.widgets`，`col` / `row` / `label` 是 Storybook 内的布局小工具。

### TextareaProps

`ui.widgets.Textarea`

[src/ui/components/input/textarea.zig:2092](https://github.com/version-next/zenit/blob/HEAD/src/ui/components/input/textarea.zig#L2092)

```zig
fn Textarea(props: TextareaProps) TextareaBuilder
```

| 字段 | 类型 | 默认值 | 说明 |
| --- | --- | --- | --- |
| `value` | `?[]const u8` | `null` | — |
| `placeholder` | `?[]const u8` | `null` | — |
| `label_text` | `?[]const u8` | `null` | — |
| `helper` | `?[]const u8` | `null` | — |
| `error_msg` | `?[]const u8` | `null` | — |
| `rows` | `u32` | `4` | — |
| `disabled` | `bool` | `false` | — |
| `required` | `bool` | `false` | — |
| `readonly` | `bool` | `false` | — |
| `width` | `?f32` | `null` | — |
| `on_change` | `?core_ui.HandlerRef` | `null` | — |
| `context` | `?*anyopaque` | `null` | — |

### \*Node

`ui.widgets.Textarea`

mount 直接返回 `*Node`，把它 append 到父节点即可。