ZacharyZhang-NYandClaude Opus 5.5
bcce34cda1
MyGo v0.5.5 returns ui.Element as a checked value handle instead of a
pointer. Migrated with `mygo migrate-ui`, then fixed what the codemod
leaves to review:
- Element nil checks become .Valid(); absent elements are ui.Element{}.
- Input handlers and paint callbacks run outside the build pass, where
elements expire and Context methods are inert: read IsDisabled into a
local during the build, keep a ui.Handle for Focus, use c.Services()
for clipboard access, create ui.Local state during the build.
- Add core.AutoFocus: v0.5.5 records an overlay's opener after its
content builds, so same-frame autofocus lost focus restore on close.
It focuses one frame later; cascader rows defer their focus likewise.
- core.OverlayLayer identifies build passes by the root element, not
c.Now(), which repeats across passes and under the Tester clock.
- Context menus survive the opening press counted as PressedOutside;
split button tooltip no longer reorders its open menu; disabled
menubar rows pass presses to the panel; Form defers blur-started
async checks so the growing message no longer moves Submit away
from the release; Combobox drops its disabled copy now that MyGo
blocks typing under a disabled wrapper (canary flipped to a guard).
- The Tester clock is virtual: tests use Advance/Now instead of
time.Sleep/time.Now and read element state inside the view. The web
mirror advances the clock to wall time before each frame and input.
- AGENTS.md and docs describe the value Element API and the new pin.
Snapshot goldens are darwin-only and were not re-verified here.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
43 lines
1.2 KiB
Markdown
43 lines
1.2 KiB
Markdown
# 212 LinkPreviewCard 链接预览卡片
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## 用途
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显示链接的站点、标题、描述与缩略图；元数据由调用方获取。整张卡片是一个按钮，悬停显示完整地址。
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## 最小示例
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```go
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p := chat.LinkPreview{URL: "https://example.com", Title: "The Palace", Site: "example.com"}
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if chat.LinkPreviewCard(c, p).Clicked() {
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fmt.Println("open", p.URL)
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}
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```
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签名：`func LinkPreviewCard(c *ui.Context, p LinkPreview) ui.Element`
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## 参数
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `URL` | `string` | 必填 | 链接地址，作为悬停提示。 |
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| `Title` | `string` | 必填 | 标题，最多两行，AccentText 色。 |
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| `Description` | `string` | "" | 描述，最多两行。 |
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| `Site` | `string` | URL | 站点名；为空时显示 URL。 |
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| `Thumbnail` | `ui.ImageSource` | nil | 缩略图，64×64 裁切显示。 |
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## 状态
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悬停时底色加深；聚焦时显示焦点环。
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## 事件
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`Clicked()`：点击或 Enter、Space；打开链接由调用方完成。
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## 键盘操作
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Tab 聚焦，Enter 或 Space 触发。
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## 限制
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- 组件不联网：标题、描述与缩略图都由调用方提供。
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