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78 lines
3.7 KiB
Markdown
78 lines
3.7 KiB
Markdown
# 组件系统模块（Component System Module）
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本目录提供组件系统的模块化基础，用于支持内置组件管理与第三方扩展接入。
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This directory provides the modular foundation for built-in component management and third-party extension integration.
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## 核心文件职责（Core Files）
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- `BuiltInComponentIds.cs`：内置组件 ID 常量（例如 `Clock`）。
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Built-in component ID constants (for example `Clock`).
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- `DesktopComponentDefinition.cs`：组件元数据定义（名称、类别、最小尺寸、可放置区域等）。
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Component metadata model (name, category, minimum size, placement permissions).
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- `ComponentPlacementRules.cs`：组件放置规则（最小尺寸、状态栏高度限制、网格边界约束）。
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Placement rules (minimum size, status-bar height rule, grid clamping).
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- `ComponentRegistry.cs`：组件注册中心，负责内置组件与扩展组件合并。
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Registry that merges built-in and extension components.
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- `Extensions/IComponentExtensionProvider.cs`：扩展提供者接口契约。
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Extension provider interface contract.
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- `Extensions/JsonComponentExtensionProvider.cs`：基于 JSON 的扩展加载器。
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JSON-based extension loader.
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## 第三方扩展契约（Extension Contract）
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- 第三方可通过实现 `IComponentExtensionProvider` 提供组件定义。
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Third parties can provide component definitions via `IComponentExtensionProvider`.
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- 当前内置了 JSON 提供者，运行时扫描目录：
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Built-in JSON provider scans at runtime:
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- `Extensions/Components/*.json`（相对应用输出目录）
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`Extensions/Components/*.json` (relative to app output directory)
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## 加载流程（Load Flow）
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1. `ComponentRegistry.CreateDefault()` 先注册内置组件。
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Register built-in components first via `ComponentRegistry.CreateDefault()`.
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2. 调用 `.RegisterExtensions(...)` 合并扩展组件。
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Merge extension components via `.RegisterExtensions(...)`.
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3. 主窗口通过注册中心校验组件合法性与放置权限。
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Main window validates component identity and placement permission through the registry.
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## JSON 清单格式（Manifest Schema）
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JSON 文件为数组，每一项代表一个组件定义。
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The JSON file is an array, where each item represents one component definition.
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```json
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[
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{
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"id": "Weather",
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"displayName": "Weather",
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"iconKey": "WeatherSunny",
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"category": "Status",
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"minWidthCells": 1,
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"minHeightCells": 1,
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"allowStatusBarPlacement": true,
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"allowDesktopPlacement": true
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}
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]
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```
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字段说明（Field notes）：
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- `id`：组件唯一 ID（建议英文、稳定不变）。
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Unique component ID (prefer stable English key).
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- `displayName`：显示名。
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Display name.
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- `iconKey`：图标键（由上层 UI 解释）。
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Icon key resolved by UI layer.
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- `category`：组件分类。
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Component category.
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- `minWidthCells` / `minHeightCells`：最小占格，必须满足 `>= 1`。
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Minimum cell size, must satisfy `>= 1`.
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- `allowStatusBarPlacement`：是否允许放到顶部状态栏。
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Whether placing in top status bar is allowed.
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- `allowDesktopPlacement`：是否允许放到桌面区域。
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Whether placing in desktop area is allowed.
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## 放置规则摘要（Placement Rules Summary）
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- 最小尺寸约束：`minWidthCells >= 1` 且 `minHeightCells >= 1`。
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Minimum size constraint: `minWidthCells >= 1` and `minHeightCells >= 1`.
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- 状态栏约束：状态栏组件高度必须为 `1` 格。
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Status bar constraint: component height must be exactly `1` cell.
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- 越界约束：所有组件坐标会被网格边界钳制（clamp）。
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Out-of-bounds constraint: component coordinates are clamped to grid bounds.
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