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>
53 lines
3.0 KiB
Markdown
53 lines
3.0 KiB
Markdown
# 321 Terminal · 终端
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## 用途
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显示终端网格：调用方把 PTY 输出写入 `TerminalState.Write`，组件解析 ANSI 样式（`internal.ParseAnsi`）、光标移动与清屏，保留滚动缓冲，支持鼠标选择复制，并把键盘输入编码后交给调用方写回 PTY。PTY 本身由调用方提供。
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## 最小示例
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```go
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var term code.TerminalState
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term.Write("\x1b[1m~/court\x1b[0m $ ls\r\n\x1b[34mdecrees\x1b[0m ledger.txt\r\n$ ")
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view := func(c *ui.Context) {
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core.Use(c, core.Settings{})
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code.Terminal(c, &term, code.TerminalOptions{
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Input: func(data string) { fmt.Printf("to pty: %q\n", data) },
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Resized: func(cols, rows int) { fmt.Println("pty size", cols, rows) },
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}).Size(380, 200)
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}
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ui.Render(view, 400, 300, 1)
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```
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## 参数
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`func Terminal(c *ui.Context, s *TerminalState, opts TerminalOptions) ui.Element`。`TerminalState` 零值是 80×24 空屏，由调用方持有；`Write(data)` 写入输出（须在界面线程，例如经 `Window.Update`），`Resize(cols, rows)`、`Lines()`、`LineText(i)`、`Select(a, b)`、`Selection()`、`ScrollBack(n)`、`Offset()`、`Cursor()`、`Size()` 供程序读取与控制。
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| 字段 | 类型 | 默认值 | 含义 |
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| --- | --- | --- | --- |
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| `Input` | `func(data string)` | nil | 用户输入编码后的字节：文字原样，Enter 为 `\r`，退格 `\x7f`，方向键 `ESC [ A–D`，Ctrl+字母为控制码。 |
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| `Resized` | `func(cols, rows int)` | nil | 网格尺寸随元素大小变化时回调，用于同步 PTY 窗口大小。 |
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| `Scrollback` | `int` | 1000 | 滚动缓冲最多保留的行数；负数 panic。 |
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| `Label` | `string` | 内置“终端” | 无障碍名称。 |
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| `Disabled` | `bool` | false | 不接收任何输入。 |
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## 状态
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默认（Surface 底、细边框）、聚焦（外侧 2 DIP 焦点环，光标为 AccentText 实心块并反白字符）、未聚焦（光标只描边）、选择（Selection 背景）、回看滚动缓冲（隐藏光标）、输入法组合（光标处显示带下划线的组合文字）、禁用。
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## 事件
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`Input`：每次按键、输入文字或粘贴；`Resized`：网格尺寸变化。复制写入系统剪贴板。
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## 键盘操作
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- 焦点在终端时，文字、Enter、Backspace、Tab、Shift+Tab、Escape、方向键、Home/End、Delete、PageUp/PageDown 与 Ctrl+字母都发送给 PTY。
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- 复制：macOS 上 Cmd+C，其他平台 Ctrl+Shift+C（复制选中文字）；粘贴：Cmd+V / Ctrl+Shift+V。
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- Shift+PageUp / Shift+PageDown：翻看滚动缓冲；滚轮同样可用；任意输入回到底部。
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## 限制
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- 状态机覆盖常用序列：SGR 样式、CUU/CUD/CUF/CUB、CHA、CUP、ED（0/1/2/3）、EL、CR/LF/BS/TAB 与 OSC（忽略）。其余 CSI 序列只记录 Debug 日志后忽略；不支持备用屏幕、滚动区域、鼠标上报与宽字符占两格。
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- 需要完整终端仿真时请使用 MyGo 的 `plugins/terminal`（基于 libghostty-vt）。
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- 字形用 `ui.Shape` 逐格排布并按行缓存，等宽字体由系统回退决定。
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