feat: Implement Canvas file export functionality and enhance Markdown export process
- Added support for exporting `.canvas` files by rendering them to images and generating corresponding `.canvas.md` files. - Updated the export logic to handle both Markdown and Canvas files, including file type checks and notifications. - Improved resource management by ensuring assets are copied correctly and links are updated in the exported content. - Refactored settings to change default export paths from 'docs' to 'wiki' for better organization. - Created detailed implementation notes and flowcharts to document the export processes and core functionalities.
This commit is contained in:
@@ -4,7 +4,7 @@
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"version": "0.1.0",
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"minAppVersion": "0.15.0",
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"description": "Export Obsidian notes to VitePress with asset management",
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"author": "Your Name",
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"authorUrl": "https://github.com/yourusername",
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"author": "nan",
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"authorUrl": "https://github.com/icrdr",
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"isDesktopOnly": false
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}
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@@ -1,424 +0,0 @@
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# VitePress Exporter 架构设计
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## 概述
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VitePress Exporter 是一个 Obsidian 插件,用于将笔记和资源导出到 VitePress 格式。核心功能包括:
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- 导出 Markdown 文件到 `docs/` 目录
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- 复制图片等资源到 `docs/assets/` 目录
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- 将 Obsidian Canvas 渲染为图片
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## 技术栈
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- **语言**: TypeScript
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- **构建工具**: esbuild
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- **包管理器**: pnpm
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- **Obsidian API**: Plugin, Workspace, TFile, Vault, MetadataCache
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## 核心架构
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### 1. 导出流程
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```
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用户触发导出
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↓
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exportCurrentNote()
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↓
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exportNote(file)
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↓
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processAssets(content, file)
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├─→ 扫描嵌入和链接(使用 MetadataCache)
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├─→ 处理 Canvas 文件 (captureCanvas)
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│ ├─→ 打开 Canvas 文件
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│ ├─→ 获取 Canvas 对象
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│ └─→ exportCanvasWithInternalAPI
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│ ├─→ 设置 zoom = 0 (100%)
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│ ├─→ 调用 takeScreenshot
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│ └─→ 保存图片
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└─→ 复制资源文件
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├─→ 使用 binary 模式读取
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└─→ 写入到 docs/assets/
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↓
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updateLinksInContent() / updateCanvasLinksInContent()
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↓
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写入 docs/ 目录(使用 binary 模式)
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```
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### 2. 文件结构
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```
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vitepress-exporter/
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├── src/
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│ ├── main.ts # 主插件源代码
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│ └── settings.ts # 设置相关代码
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├── manifest.json # 插件清单
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├── package.json # 项目配置
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├── esbuild.config.mjs # 构建配置
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├── tsconfig.json # TypeScript 配置
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└── notes/ # 开发文档
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├── architecture.md # 本文档
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├── canvas-rendering.md # Canvas 渲染详细说明
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└── flowchart.md # 流程图
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```
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### 3. 关键类和方法
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#### VitePressExporterPlugin
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主插件类,继承自 `Plugin`:
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```typescript
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class VitePressExporterPlugin extends Plugin {
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settings: VitePressExporterSettings;
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// 生命周期
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async onload() // 插件加载,注册命令和菜单
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onunload() // 插件卸载
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// 设置管理
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async loadSettings() // 加载设置
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async saveSettings() // 保存设置
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// 导出功能
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async exportCurrentNote() // 导出当前笔记
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async exportNote(file) // 导出单个笔记
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// 资源处理
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async processAssets(content, file) // 处理资源文件和 Canvas
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// Canvas 渲染
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async captureCanvas(canvasFile) // 捕获 Canvas 为图片
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async exportCanvasWithInternalAPI(canvas, canvasFile) // 使用内部 API
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// 链接更新
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updateLinksInContent(content, sourceFile, assetPath, newFileName) // 更新资源链接
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updateCanvasLinksInContent(content, canvasFile, canvasPath, imageFileName) // 更新 Canvas 链接
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}
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```
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## Canvas 渲染架构
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### 核心决策
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**使用 Obsidian Canvas 内部 API**,而不是自己实现渲染逻辑:
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- ✅ `canvas.takeScreenshot()` - 直接截图
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- ✅ `canvas.getViewportBBox()` - 获取边界框
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- ✅ `canvas.zoom` - 控制缩放(对数刻度)
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- ✅ `canvas.requestFrame()` - 触发重绘
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**为什么不使用第三方库**:
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- ❌ `html-to-image` - 需要滑动窗口,代码复杂
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- ❌ `dom-to-image-more` - 维护不活跃
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- ✅ Obsidian 内部 API - 兼容性好,代码简洁
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### Zoom 对数刻度
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**关键发现**:`canvas.zoom` 使用对数刻度(base 2)
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```typescript
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zoom = 0 → scale = 2^0 = 1.0 (100%)
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zoom = 1 → scale = 2^1 = 2.0 (200%)
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zoom = -1 → scale = 2^-1 = 0.5 (50%)
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```
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**重要**:设置 `zoom = 0` 获得准确的 100% 缩放,不要设置 `zoom = 1.0`!
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### 文件路径处理
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`takeScreenshot` 需要绝对文件系统路径:
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```typescript
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// 1. 获取 vault 的完整路径
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const vaultBasePath = vault.adapter.basePath;
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// 2. 构建临时文件的绝对路径
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const tempFullPath = `${vaultBasePath}/temp_canvas_${Date.now()}.png`;
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// 3. 调用 takeScreenshot(需要绝对路径)
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await canvas.takeScreenshot(tempFullPath, false);
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// 4. 使用相对路径读取(vault API)
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const imageBuffer = await vault.adapter.readBinary(tempFileName);
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// 5. 删除临时文件
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await vault.adapter.remove(tempFileName);
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// 6. 写入到正确位置(相对路径)
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await vault.adapter.writeBinary(finalPath, imageBuffer);
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```
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## 资源处理
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### 资源类型
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1. **嵌入资源** (`![[image.png]]`)
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- 图片、PDF 等非 Markdown 文件
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- 自动复制到 `docs/assets/`
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- 使用 binary 模式保留原始内容
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2. **Canvas 文件** (`![[diagram.canvas]]`)
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- 使用内部 API 渲染为 PNG 图片
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- 替换为 `<Viewer src="assets/diagram.png" />`
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3. **普通链接** (`[[other-file]]`)
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- Markdown 文件不复制
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- 其他资源文件会被复制
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### 资源扫描机制
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使用 Obsidian 的 `MetadataCache` API:
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```typescript
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const cache = metadataCache.getCache(sourceFile.path);
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// 嵌入文件
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if (cache.embeds) {
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for (const embed of cache.embeds) {
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const resolvedLink = metadataCache.getFirstLinkpathDest(embed.link, sourceFile.path);
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// 检查是否是 Canvas 或其他资源
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}
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}
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// 普通链接
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if (cache.links) {
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for (const link of cache.links) {
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const resolvedLink = metadataCache.getFirstLinkpathDest(link.link, sourceFile.path);
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// 只复制非 Markdown 文件
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}
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}
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```
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### 路径更新
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资源链接会自动更新为相对于 `docs/` 的路径:
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**Markdown 格式**:
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```markdown
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之前: 
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之后: 
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```
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**Wikilink 格式**:
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```markdown
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之前: ![[images/screenshot.png]]
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之后: ![[assets/screenshot.png]]
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```
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**Canvas 特殊处理**:
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```markdown
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之前: ![[diagram.canvas]]
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之后: <Viewer src="assets/diagram.png" />
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```
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### 路径解析策略
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支持多种路径格式的智能匹配:
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```typescript
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const possiblePaths = [
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assetPath, // 完整路径
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assetPath.substring(sourceDir.length + 1), // 相对路径
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encodeURI(assetPath), // URL 编码
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encodeURI(assetPath.substring(sourceDir.length + 1)),
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sourceFile.name, // 文件名
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encodeURI(sourceFile.name)
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];
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||||
```
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## 配置
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||||
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||||
### 插件设置
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||||
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```typescript
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interface VitePressExporterSettings {
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docsPath: string; // 默认: 'docs'
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||||
assetsPath: string; // 默认: 'docs/assets'
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||||
}
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||||
```
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||||
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||||
### Obsidian 配置
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||||
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||||
插件通过 Obsidian 的设置界面配置:
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||||
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||||
1. 设置 → 社区插件 → VitePress Exporter → 选项
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||||
2. 配置 `Docs path` 和 `Assets path`
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3. 保存设置
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||||
## 文件读写
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||||
### Binary 模式
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||||
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||||
所有文件操作都使用 binary 模式,以保留原始格式:
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||||
|
||||
```typescript
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||||
// 读取文件
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||||
const contentBuffer = await vault.readBinary(file);
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||||
const content = new TextDecoder().decode(contentBuffer);
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||||
|
||||
// 写入文件
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||||
const updatedBuffer = new TextEncoder().encode(updatedContent);
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||||
await vault.adapter.writeBinary(docsPath, updatedBuffer.buffer);
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||||
```
|
||||
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||||
**优势**:
|
||||
- 保留行尾空格
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||||
- 保留特殊字符
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||||
- 不修改原始格式
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||||
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||||
## 错误处理
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||||
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||||
### Canvas 渲染失败
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||||
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||||
当 Canvas 渲染失败时,会在控制台输出错误信息,但不会中断整个导出流程:
|
||||
|
||||
```typescript
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||||
try {
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||||
const renderedImage = await this.captureCanvas(canvasFile);
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||||
if (renderedImage) {
|
||||
// 成功处理
|
||||
}
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||||
} catch (error) {
|
||||
console.error(`Failed to render canvas ${canvasPath}:`, error);
|
||||
}
|
||||
// 继续处理其他文件
|
||||
```
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||||
|
||||
### 资源复制失败
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||||
|
||||
单个资源文件复制失败不会影响其他文件:
|
||||
|
||||
```typescript
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||||
try {
|
||||
// 复制资源
|
||||
} catch (error) {
|
||||
console.error(`Failed to copy asset ${assetPath}:`, error);
|
||||
}
|
||||
// 继续处理下一个资源
|
||||
```
|
||||
|
||||
## 性能考虑
|
||||
|
||||
### 优化策略
|
||||
|
||||
1. **使用 MetadataCache**
|
||||
- 快速获取文件的嵌入和链接信息
|
||||
- 避免手动解析 Markdown
|
||||
|
||||
2. **批量处理**
|
||||
- 一次性收集所有需要处理的文件
|
||||
- 批量复制和更新
|
||||
|
||||
3. **异步操作**
|
||||
- 所有文件操作都是异步的
|
||||
- 不阻塞 UI 线程
|
||||
|
||||
4. **Binary 模式**
|
||||
- 减少字符串转换开销
|
||||
- 直接操作二进制数据
|
||||
|
||||
### 预期性能
|
||||
|
||||
- 小笔记(< 10 个资源):< 1 秒
|
||||
- 中等笔记(10-50 个资源):< 3 秒
|
||||
- 大笔记(> 50 个资源或多个 Canvas):< 10 秒
|
||||
|
||||
## 触发方式
|
||||
|
||||
插件提供三种导出触发方式:
|
||||
|
||||
1. **命令面板**
|
||||
- `Export current note to VitePress`
|
||||
|
||||
2. **文件菜单**
|
||||
- 右键点击文件 → `Export to VitePress`
|
||||
|
||||
3. **编辑器菜单**
|
||||
- 右键点击编辑器 → `Export to VitePress`
|
||||
|
||||
## 未来扩展
|
||||
|
||||
### 可能的功能
|
||||
|
||||
1. **批量导出**
|
||||
- 导出整个文件夹
|
||||
- 导出所有笔记
|
||||
|
||||
2. **高级配置**
|
||||
- 自定义图片格式(PNG/JPEG/WebP)
|
||||
- 图片质量控制
|
||||
- 自定义链接替换规则
|
||||
|
||||
3. **VitePress 集成**
|
||||
- 自动生成 frontmatter
|
||||
- 自动创建索引页面
|
||||
- 集成 VitePress 构建流程
|
||||
|
||||
4. **更多资源类型**
|
||||
- 支持视频嵌入
|
||||
- 支持音频文件
|
||||
- 支持其他特殊格式
|
||||
|
||||
## 维护指南
|
||||
|
||||
### 修改导出逻辑
|
||||
|
||||
主要导出逻辑在 `exportNote()` 方法中:
|
||||
|
||||
```typescript
|
||||
async exportNote(file: TFile) {
|
||||
// 1. 读取文件(binary 模式)
|
||||
const contentBuffer = await vault.readBinary(file);
|
||||
const content = new TextDecoder().decode(contentBuffer);
|
||||
|
||||
// 2. 处理资源
|
||||
const updatedContent = await this.processAssets(content, file);
|
||||
|
||||
// 3. 写入文件(binary 模式)
|
||||
const updatedBuffer = new TextEncoder().encode(updatedContent);
|
||||
await vault.adapter.writeBinary(docsPath, updatedBuffer.buffer);
|
||||
}
|
||||
```
|
||||
|
||||
### 添加新的资源类型
|
||||
|
||||
在 `processAssets()` 方法中添加:
|
||||
|
||||
```typescript
|
||||
if (cache.embeds) {
|
||||
for (const embed of cache.embeds) {
|
||||
const resolvedLink = metadataCache.getFirstLinkpathDest(embed.link, sourceFile.path);
|
||||
if (resolvedLink) {
|
||||
if (resolvedLink.extension === 'canvas') {
|
||||
// Canvas 处理
|
||||
} else if (resolvedLink.extension === 'newtype') {
|
||||
// 处理新类型
|
||||
} else {
|
||||
// 普通资源
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### 调试技巧
|
||||
|
||||
1. **启用详细日志**
|
||||
```typescript
|
||||
console.log('Processing assets for file:', sourceFile.path);
|
||||
console.log('Cache:', cache);
|
||||
console.log('Assets to copy:', Array.from(assetsToCopy));
|
||||
```
|
||||
|
||||
2. **使用 Obsidian 开发者工具**
|
||||
- `Ctrl+Shift+I` 打开控制台
|
||||
- 查看日志输出
|
||||
|
||||
3. **测试单个功能**
|
||||
- 创建最小测试用例
|
||||
- 逐步验证每个步骤
|
||||
|
||||
## 相关文档
|
||||
|
||||
- [Canvas 渲染详细说明](./canvas-rendering.md) - Canvas 渲染的实现细节
|
||||
- [执行流程图](./flowchart.md) - 完整的导出流程图
|
||||
- [Obsidian API 文档](https://github.com/obsidianmd/obsidian-api) - 官方 API
|
||||
@@ -1,411 +0,0 @@
|
||||
# VitePress Exporter 执行流程
|
||||
|
||||
## 插件概述
|
||||
|
||||
VitePress Exporter 是一个 Obsidian 插件,用于将当前笔记导出到 VitePress 文档系统,包括资源文件管理和 Canvas 渲染功能。
|
||||
|
||||
## 完整执行流程图
|
||||
|
||||
```mermaid
|
||||
flowchart TD
|
||||
Start([用户触发导出]) --> CheckActiveFile{检查当前文件}
|
||||
CheckActiveFile -->|没有活动文件| ShowError1[显示错误提示]
|
||||
CheckActiveFile -->|不是 md 文件| ShowError2[显示错误提示]
|
||||
CheckActiveFile -->|是 md 文件| ReadFile[读取文件内容<br/>使用 binary 模式]
|
||||
|
||||
ReadFile --> ProcessAssets[处理资源文件<br/>processAssets]
|
||||
ProcessAssets --> GetCache[获取文件元数据缓存<br/>metadataCache.getCache]
|
||||
|
||||
GetCache --> CheckCache{缓存是否存在}
|
||||
CheckCache -->|否| ReturnContent[返回原内容]
|
||||
CheckCache -->|是| InitializeSets[初始化集合<br/>assetsToCopy, canvasFiles]
|
||||
|
||||
InitializeSets --> ScanEmbeds[扫描嵌入文件<br/>cache.embeds]
|
||||
ScanEmbeds --> CheckEmbed{有嵌入文件?}
|
||||
CheckEmbed -->|否| ScanLinks
|
||||
CheckEmbed -->|是| ResolveEmbed[解析嵌入路径<br/>getFirstLinkpathDest]
|
||||
|
||||
ResolveEmbed --> CheckCanvas{是 canvas 文件?}
|
||||
CheckCanvas -->|是| AddToCanvasSet[添加到 canvasFiles]
|
||||
CheckCanvas -->|否| AddToAssetsSet[添加到 assetsToCopy]
|
||||
AddToCanvasSet --> ScanEmbeds
|
||||
AddToAssetsSet --> ScanEmbeds
|
||||
|
||||
ScanEmbeds --> ScanLinks[扫描链接文件<br/>cache.links]
|
||||
ScanLinks --> CheckLink{有链接文件?}
|
||||
CheckLink -->|否| ProcessCanvasFiles
|
||||
CheckLink -->|是| ResolveLink[解析链接路径<br/>getFirstLinkpathDest]
|
||||
|
||||
ResolveLink --> CheckMD{是 md 文件?}
|
||||
CheckMD -->|是| SkipLink[跳过]
|
||||
CheckMD -->|否| AddToAssetsSet
|
||||
SkipLink --> ScanLinks
|
||||
AddToAssetsSet --> ScanLinks
|
||||
|
||||
ScanLinks --> ProcessCanvasFiles[处理 Canvas 文件]
|
||||
ProcessCanvasFiles --> CheckCanvasEmpty{有 Canvas 文件?}
|
||||
|
||||
CheckCanvasEmpty -->|否| ProcessAssetFiles
|
||||
CheckCanvasEmpty -->|是| GetCanvasFile[获取 Canvas 文件对象]
|
||||
|
||||
GetCanvasFile --> CaptureCanvas[captureCanvas]
|
||||
CaptureCanvas --> OpenFile[打开 Canvas 文件<br/>activeLeaf.openFile]
|
||||
|
||||
OpenFile --> GetCanvas[获取 Canvas 对象<br/>activeLeaf.view.canvas]
|
||||
GetCanvas --> CheckCanvasObj{Canvas 对象存在?}
|
||||
|
||||
CheckCanvasObj -->|否| NextCanvas
|
||||
CheckCanvasObj -->|是| ExportInternalAPI[exportCanvasWithInternalAPI]
|
||||
|
||||
ExportInternalAPI --> GetBBox[获取视口边界框<br/>getViewportBBox]
|
||||
GetBBox --> SetZoom[设置 zoom = 0<br/>100% 缩放]
|
||||
|
||||
SetZoom --> RequestFrame[请求重绘<br/>requestFrame]
|
||||
RequestFrame --> WaitRender[等待渲染<br/>100ms + rAF]
|
||||
|
||||
WaitRender --> TakeScreenshot[调用 takeScreenshot<br/>使用绝对路径]
|
||||
TakeScreenshot --> WaitWrite[等待文件写入<br/>100ms]
|
||||
|
||||
WaitWrite --> ReadTemp[读取临时文件<br/>readBinary]
|
||||
ReadTemp --> CheckBuffer{读取成功?}
|
||||
|
||||
CheckBuffer -->|否| LogError1[记录错误]
|
||||
CheckBuffer -->|是| RemoveTemp[删除临时文件]
|
||||
|
||||
RemoveTemp --> WriteFinal[写入最终位置<br/>writeBinary]
|
||||
WriteFinal --> UpdateCanvasLinks[更新 Canvas 链接<br/>updateCanvasLinksInContent]
|
||||
|
||||
UpdateCanvasLinks --> NextCanvas{还有 Canvas?}
|
||||
LogError1 --> NextCanvas
|
||||
NextCanvas -->|是| GetCanvasFile
|
||||
NextCanvas -->|否| ProcessAssetFiles
|
||||
|
||||
subgraph 资源复制流程
|
||||
ProcessAssetFiles[处理资源文件] --> CheckAssets{有资源文件?}
|
||||
CheckAssets -->|否| WriteDocs
|
||||
CheckAssets -->|是| GetAssetFile[获取资源文件对象]
|
||||
|
||||
GetAssetFile --> ReadAsset[读取资源文件<br/>readBinary binary 模式]
|
||||
ReadAsset --> MkdirAssets[创建 assets 目录<br/>mkdir]
|
||||
|
||||
MkdirAssets --> WriteAsset[写入到 docs/assets<br/>writeBinary binary 模式]
|
||||
WriteAsset --> UpdateLinks[更新资源链接<br/>updateLinksInContent]
|
||||
|
||||
UpdateLinks --> NextAsset{还有资源?}
|
||||
NextAsset -->|是| GetAssetFile
|
||||
NextAsset -->|否| WriteDocs
|
||||
end
|
||||
|
||||
WriteDocs[写入到 docs 目录<br/>writeBinary binary 模式] --> Success[显示成功提示]
|
||||
Success --> End([结束])
|
||||
|
||||
ShowError1 --> End
|
||||
ShowError2 --> End
|
||||
ReturnContent --> WriteDocs
|
||||
|
||||
style Start fill:#e1f5e1
|
||||
style End fill:#ffe1e1
|
||||
style Success fill:#e1f5e1
|
||||
style ShowError1 fill:#ffe1e1
|
||||
style ShowError2 fill:#ffe1e1
|
||||
style ProcessCanvasFiles fill:#fff4e1
|
||||
style ProcessAssetFiles fill:#e1f0ff
|
||||
style ExportInternalAPI fill:#ffe1ff
|
||||
```
|
||||
|
||||
## 核心功能模块
|
||||
|
||||
### 1. 导出流程
|
||||
|
||||
**触发方式**:
|
||||
- 命令面板:`Export current note to VitePress`
|
||||
- 文件右键菜单:`Export to VitePress`
|
||||
- 编辑器右键菜单:`Export to VitePress`
|
||||
|
||||
**文件验证**:
|
||||
- 检查活动文件是否存在
|
||||
- 验证文件扩展名是否为 `md`
|
||||
|
||||
**内容读取**:
|
||||
- 使用 `vault.readBinary()` 读取文件
|
||||
- 保留原始格式(包括行尾空格)
|
||||
|
||||
### 2. 资源处理
|
||||
|
||||
**扫描机制**:
|
||||
- 使用 `metadataCache.getCache()` 获取文件元数据
|
||||
- 扫描 `cache.embeds` 获取嵌入文件
|
||||
- 扫描 `cache.links` 获取链接文件
|
||||
|
||||
**文件分类**:
|
||||
- Canvas 文件:扩展名为 `.canvas`
|
||||
- 普通资源:非 Markdown 文件
|
||||
- Markdown 文件:不复制
|
||||
|
||||
**路径解析**:
|
||||
- 使用 `metadataCache.getFirstLinkpathDest()` 解析路径
|
||||
- 支持相对路径和绝对路径
|
||||
|
||||
### 3. Canvas 渲染
|
||||
|
||||
**打开文件**:
|
||||
- 使用 `workspace.getLeaf()` 获取 leaf
|
||||
- 调用 `activeLeaf.openFile()` 打开 Canvas
|
||||
- 从 `activeLeaf.view.canvas` 获取 Canvas 对象
|
||||
|
||||
**渲染过程**:
|
||||
- 获取视口边界框 `getViewportBBox()`
|
||||
- 设置 `zoom = 0`(100% 缩放)
|
||||
- 请求重绘 `requestFrame()`
|
||||
- 等待渲染完成(100ms + requestAnimationFrame)
|
||||
- 调用 `takeScreenshot(绝对路径)` 截图
|
||||
|
||||
**文件处理**:
|
||||
- 保存到临时文件(绝对路径)
|
||||
- 读取临时文件(相对路径)
|
||||
- 删除临时文件
|
||||
- 写入到最终位置
|
||||
|
||||
### 4. 链接更新
|
||||
|
||||
**Markdown 格式**:
|
||||
```markdown
|
||||
之前: 
|
||||
之后: 
|
||||
```
|
||||
|
||||
**Wikilink 格式**:
|
||||
```markdown
|
||||
之前: ![[path/to/image.png]]
|
||||
之后: ![[assets/image.png]]
|
||||
```
|
||||
|
||||
**Canvas 特殊处理**:
|
||||
```markdown
|
||||
之前: ![[diagram.canvas]]
|
||||
之后: <Viewer src="assets/diagram.png" />
|
||||
```
|
||||
|
||||
**路径匹配**:
|
||||
- 支持多种格式(绝对、相对、URL 编码)
|
||||
- 使用正则表达式匹配和替换
|
||||
- 转换为相对路径
|
||||
|
||||
### 5. 文件写入
|
||||
|
||||
**Binary 模式**:
|
||||
- 使用 `TextEncoder.encode()` 转换内容
|
||||
- 调用 `vault.adapter.writeBinary()` 写入
|
||||
- 保留原始格式
|
||||
|
||||
## 关键方法说明
|
||||
|
||||
### exportCurrentNote()
|
||||
导出当前活动笔记
|
||||
|
||||
```typescript
|
||||
async exportCurrentNote() {
|
||||
const activeFile = this.app.workspace.getActiveFile();
|
||||
if (!activeFile) {
|
||||
new Notice('No active file found');
|
||||
return;
|
||||
}
|
||||
if (activeFile.extension !== 'md') {
|
||||
new Notice('Current file is not a markdown file');
|
||||
return;
|
||||
}
|
||||
await this.exportNote(activeFile);
|
||||
}
|
||||
```
|
||||
|
||||
### exportNote(file)
|
||||
执行导出逻辑
|
||||
|
||||
```typescript
|
||||
async exportNote(file: TFile) {
|
||||
// 1. 读取文件(binary 模式)
|
||||
const contentBuffer = await vault.readBinary(file);
|
||||
const content = new TextDecoder().decode(contentBuffer);
|
||||
|
||||
// 2. 处理资源
|
||||
const updatedContent = await this.processAssets(content, file);
|
||||
|
||||
// 3. 写入文件(binary 模式)
|
||||
const docsPath = `${this.settings.docsPath}/${file.name}`;
|
||||
const updatedBuffer = new TextEncoder().encode(updatedContent);
|
||||
await vault.adapter.writeBinary(docsPath, updatedBuffer.buffer);
|
||||
}
|
||||
```
|
||||
|
||||
### processAssets(content, file)
|
||||
处理资源文件
|
||||
|
||||
```typescript
|
||||
async processAssets(content: string, sourceFile: TFile): Promise<string> {
|
||||
const cache = metadataCache.getCache(sourceFile.path);
|
||||
if (!cache) return content;
|
||||
|
||||
const assetsToCopy = new Set<string>();
|
||||
const canvasFiles = new Set<string>();
|
||||
|
||||
// 收集嵌入文件
|
||||
if (cache.embeds) {
|
||||
for (const embed of cache.embeds) {
|
||||
const resolvedLink = metadataCache.getFirstLinkpathDest(embed.link, sourceFile.path);
|
||||
if (resolvedLink) {
|
||||
if (resolvedLink.extension === 'canvas') {
|
||||
canvasFiles.add(resolvedLink.path);
|
||||
} else {
|
||||
assetsToCopy.add(resolvedLink.path);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// 收集链接文件
|
||||
if (cache.links) {
|
||||
for (const link of cache.links) {
|
||||
const resolvedLink = metadataCache.getFirstLinkpathDest(link.link, sourceFile.path);
|
||||
if (resolvedLink && resolvedLink.extension !== 'md') {
|
||||
assetsToCopy.add(resolvedLink.path);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// 处理 Canvas 文件
|
||||
for (const canvasPath of canvasFiles) {
|
||||
const renderedImage = await this.captureCanvas(canvasFile);
|
||||
if (renderedImage) {
|
||||
// 写入并更新链接
|
||||
}
|
||||
}
|
||||
|
||||
// 复制资源文件
|
||||
for (const assetPath of assetsToCopy) {
|
||||
const assetContent = await vault.readBinary(sourceFile);
|
||||
await vault.adapter.writeBinary(destPath, assetContent);
|
||||
content = this.updateLinksInContent(content, ...);
|
||||
}
|
||||
|
||||
return content;
|
||||
}
|
||||
```
|
||||
|
||||
### captureCanvas(canvasFile)
|
||||
捕获 Canvas 为图片
|
||||
|
||||
```typescript
|
||||
async captureCanvas(canvasFile: TFile): Promise<Uint8Array | null> {
|
||||
const activeLeaf = this.app.workspace.getLeaf();
|
||||
await activeLeaf.openFile(canvasFile);
|
||||
|
||||
const canvas = activeLeaf.view.canvas;
|
||||
if (!canvas) return null;
|
||||
|
||||
return await this.exportCanvasWithInternalAPI(canvas, canvasFile);
|
||||
}
|
||||
```
|
||||
|
||||
## 数据流图
|
||||
|
||||
```
|
||||
用户触发
|
||||
↓
|
||||
exportCurrentNote()
|
||||
↓
|
||||
exportNote(file)
|
||||
↓
|
||||
readBinary(file) → content
|
||||
↓
|
||||
processAssets(content, file)
|
||||
├─→ metadataCache.getCache() → cache
|
||||
├─→ 收集文件 → canvasFiles, assetsToCopy
|
||||
├─→ 处理 Canvas
|
||||
│ ├─→ captureCanvas()
|
||||
│ ├─→ takeScreenshot()
|
||||
│ └─→ updateCanvasLinksInContent()
|
||||
└─→ 复制资源
|
||||
├─→ readBinary()
|
||||
├─→ writeBinary()
|
||||
└─→ updateLinksInContent()
|
||||
↓
|
||||
updatedContent
|
||||
↓
|
||||
TextEncoder.encode() → buffer
|
||||
↓
|
||||
writeBinary(docsPath, buffer)
|
||||
↓
|
||||
完成
|
||||
```
|
||||
|
||||
## 错误处理
|
||||
|
||||
### 文件验证失败
|
||||
- 没有活动文件 → 显示 Notice
|
||||
- 文件不是 Markdown → 显示 Notice
|
||||
|
||||
### Canvas 渲染失败
|
||||
- 捕获异常并记录日志
|
||||
- 继续处理其他文件
|
||||
- 不中断整个导出流程
|
||||
|
||||
### 资源复制失败
|
||||
- 捕获异常并记录日志
|
||||
- 继续处理下一个资源
|
||||
- 不影响其他文件
|
||||
|
||||
## 性能特点
|
||||
|
||||
### 优化策略
|
||||
|
||||
1. **使用 MetadataCache**
|
||||
- 快速获取文件关系
|
||||
- 避免手动解析
|
||||
|
||||
2. **Binary 模式**
|
||||
- 减少字符串转换
|
||||
- 保留原始格式
|
||||
|
||||
3. **异步操作**
|
||||
- 所有文件操作异步
|
||||
- 不阻塞 UI
|
||||
|
||||
4. **错误隔离**
|
||||
- 单个文件失败不影响其他
|
||||
- 继续处理后续文件
|
||||
|
||||
### 时间复杂度
|
||||
|
||||
- 文件读取:O(n)
|
||||
- 资源扫描:O(e + l) 其中 e=嵌入数,l=链接数
|
||||
- Canvas 渲染:O(c) 其中 c=Canvas 数量
|
||||
- 资源复制:O(a) 其中 a=资源数量
|
||||
|
||||
总体:O(n + e + l + c + a)
|
||||
|
||||
## 配置选项
|
||||
|
||||
用户可以在插件设置中配置:
|
||||
|
||||
- **docsPath**: 导出文档目录(默认: `docs`)
|
||||
- **assetsPath**: 资源文件目录(默认: `docs/assets`)
|
||||
|
||||
## 未来改进方向
|
||||
|
||||
1. **批量导出**
|
||||
- 导出整个文件夹
|
||||
- 导出多个选中的文件
|
||||
|
||||
2. **进度显示**
|
||||
- 显示导出进度条
|
||||
- 显示当前处理的文件
|
||||
|
||||
3. **更多配置**
|
||||
- 自定义图片格式
|
||||
- 自定义链接转换规则
|
||||
- 排除特定文件类型
|
||||
|
||||
4. **性能优化**
|
||||
- 并行处理资源
|
||||
- 缓存已渲染的 Canvas
|
||||
- 增量导出(只处理修改的文件)
|
||||
375
notes/implementation.md
Normal file
375
notes/implementation.md
Normal file
@@ -0,0 +1,375 @@
|
||||
## 核心功能
|
||||
|
||||
1. **Markdown 文件导出**:将 `.md` 文件导出到 VitePress 的 docs 目录,自动处理资源文件
|
||||
2. **Canvas 文件导出**:将 `.canvas` 文件渲染为图片并生成对应的 `.canvas.md` 文件
|
||||
3. **资源文件管理**:自动复制和处理图片、Canvas 等资源文件
|
||||
4. **路径规则配置**:支持多种目录结构和命名规则
|
||||
|
||||
## 主要流程
|
||||
|
||||
### 整体架构流程
|
||||
|
||||
```mermaid
|
||||
graph TB
|
||||
Start[用户触发导出] --> CheckType{检查文件类型}
|
||||
CheckType -->|Canvas 文件| CanvasFlow[Canvas 导出流程]
|
||||
CheckType -->|Markdown 文件| MarkdownFlow[Markdown 导出流程]
|
||||
|
||||
CanvasFlow --> RenderCanvas[渲染 Canvas 为图片]
|
||||
RenderCanvas --> SaveImage[保存图片到 assetsPath]
|
||||
SaveImage --> GenerateCanvasMD[生成 .canvas.md 文件]
|
||||
GenerateCanvasMD --> WriteCanvas[写入文件]
|
||||
WriteCanvas --> End[完成]
|
||||
|
||||
MarkdownFlow --> ReadContent[读取文件内容]
|
||||
ReadContent --> ProcessAssets[扫描并处理资源]
|
||||
ProcessAssets --> CollectLinks[收集链接和嵌入]
|
||||
CollectLinks --> Separate{分类资源}
|
||||
|
||||
Separate -->|Canvas 文件| RenderCanvas
|
||||
Separate -->|普通资源| CopyAssets[复制资源到 assetsPath]
|
||||
|
||||
CopyAssets --> UpdateLinks[更新内容中的链接]
|
||||
RenderCanvas --> UpdateCanvasLinks[更新 Canvas 链接为 Viewer 组件]
|
||||
|
||||
UpdateCanvasLinks --> CalculatePath[计算输出路径]
|
||||
UpdateLinks --> CalculatePath
|
||||
|
||||
CalculatePath --> ApplyRules{应用路径规则}
|
||||
ApplyRules --> PreserveFolder[preserveFolderStructure?]
|
||||
PreserveFolder -->|是| KeepStructure[保留文件夹结构]
|
||||
PreserveFolder -->|否| Flatten[扁平化]
|
||||
|
||||
KeepStructure --> NestNote{nestNoteFolder?}
|
||||
Flatten --> NestNote
|
||||
|
||||
NestNote -->|是| CreateIndex[创建 index.md]
|
||||
NestNote -->|否| UseFilename[使用原文件名]
|
||||
|
||||
CreateIndex --> WriteMD[写入 Markdown 文件]
|
||||
UseFilename --> WriteMD
|
||||
|
||||
WriteMD --> End
|
||||
```
|
||||
|
||||
### 资源处理流程
|
||||
|
||||
```mermaid
|
||||
graph TB
|
||||
Start[processAssets 开始] --> GetCache[获取文件缓存]
|
||||
GetCache --> CheckCache{缓存存在?}
|
||||
CheckCache -->|否| ReturnContent[返回原内容]
|
||||
CheckCache -->|是| CollectStart[收集资源]
|
||||
|
||||
CollectStart --> ScanEmbeds[扫描 embeds]
|
||||
ScanEmbeds --> CheckEmbed{是 Canvas?}
|
||||
CheckEmbed -->|是| AddCanvas[添加到 canvasFiles]
|
||||
CheckEmbed -->|否| AddAsset[添加到 assetsToCopy]
|
||||
|
||||
AddCanvas --> ScanLinks[扫描 links]
|
||||
AddAsset --> ScanLinks
|
||||
|
||||
ScanLinks --> CheckLink{是本地资源?}
|
||||
CheckLink -->|是| AddAsset
|
||||
CheckLink -->|否| ProcessCanvas
|
||||
|
||||
ProcessCanvas[处理 Canvas 文件] --> RenderEach[遍历每个 Canvas]
|
||||
RenderEach --> CallRender[调用 renderCanvas]
|
||||
CallRender --> SavePNG[保存为 PNG]
|
||||
SavePNG --> UpdateCanvasLink[更新为 Viewer 组件]
|
||||
|
||||
UpdateCanvasLink --> CopyAssets[复制普通资源]
|
||||
CopyAssets --> CopyEach[遍历每个资源]
|
||||
CopyEach --> ReadBinary[Binary 模式读取]
|
||||
ReadBinary --> WriteAsset[写入 assetsPath]
|
||||
WriteAsset --> UpdateAssetLink[更新资源链接]
|
||||
|
||||
UpdateAssetLink --> ReturnContent[返回更新后的内容]
|
||||
```
|
||||
|
||||
### Canvas 渲染流程
|
||||
|
||||
```mermaid
|
||||
graph TB
|
||||
Start[renderCanvas 开始] --> OpenFile[打开 Canvas 文件]
|
||||
OpenFile --> GetCanvas[获取 Canvas 对象]
|
||||
GetCanvas --> CheckCanvas{Canvas 存在?}
|
||||
CheckCanvas -->|否| ReturnNull[返回 null]
|
||||
CheckCanvas -->|是| CalcSystem[计算系统参数]
|
||||
|
||||
CalcSystem --> GetZoom[获取缩放级别]
|
||||
GetZoom --> CalcPixel[计算设备像素比]
|
||||
CalcPixel --> CalcScale[计算缩放校正系数]
|
||||
|
||||
CalcScale --> GetNodes[获取所有节点]
|
||||
GetNodes --> CalcBBox[计算边界框]
|
||||
CalcBBox --> CalcSize[计算宽度和高度]
|
||||
|
||||
CalcSize --> CalcLimit{计算缩放限制}
|
||||
CalcLimit --> CheckLimit{超过 16284px?}
|
||||
CheckLimit -->|是| UseLimit[使用限制值]
|
||||
CheckLimit -->|否| UseZoom[使用原始缩放]
|
||||
|
||||
UseLimit --> PrepareCanvas[准备 Canvas 环境]
|
||||
UseZoom --> PrepareCanvas
|
||||
|
||||
PrepareCanvas --> DeselectAll[取消选择]
|
||||
DeselectAll --> AddScreenshotting[添加截图样式]
|
||||
AddScreenshotting --> AppendToBody[附加到 body]
|
||||
|
||||
AppendToBody --> SetPosition[设置位置]
|
||||
SetPosition --> CalcViewport[计算视口]
|
||||
CalcViewport --> SetCanvasZoom[设置 Canvas 缩放]
|
||||
SetCanvasZoom --> RequestFrame[请求帧]
|
||||
|
||||
RequestFrame --> WaitRender[等待渲染完成]
|
||||
WaitRender --> CalcTiles[计算分块数量]
|
||||
CalcTiles --> CreateFinalCanvas[创建最终 Canvas]
|
||||
|
||||
CreateFinalCanvas --> RenderLoop[渲染循环]
|
||||
RenderLoop --> SetViewport[设置视口位置]
|
||||
SetViewport --> RequestTileFrame[请求分块帧]
|
||||
RequestTileFrame --> WaitTile[等待渲染]
|
||||
WaitTile --> CapturePage[捕获页面]
|
||||
CapturePage --> ConvertToPNG[转换为 PNG]
|
||||
ConvertToPNG --> DrawToFinal[绘制到最终 Canvas]
|
||||
DrawToFinal --> CheckNext{还有分块?}
|
||||
CheckNext -->|是| SetViewport
|
||||
CheckNext -->|否| ConvertFinal[转换最终 Canvas]
|
||||
|
||||
ConvertFinal --> ToBlob[转换为 Blob]
|
||||
ToBlob --> ToArrayBuffer[转换为 ArrayBuffer]
|
||||
ToArrayBuffer -> ToUint8Array[转换为 Uint8Array]
|
||||
ToUint8Array --> ReturnResult[返回结果]
|
||||
|
||||
ReturnResult --> Cleanup[清理环境]
|
||||
Cleanup --> RestoreStyles[恢复样式]
|
||||
RestoreStyles --> ResetCanvas[重置 Canvas]
|
||||
ResetCanvas --> End[结束]
|
||||
|
||||
ReturnNull --> End
|
||||
```
|
||||
|
||||
## 核心方法说明
|
||||
|
||||
### 1. exportCurrentNote()
|
||||
**位置**:main.ts:75-89
|
||||
|
||||
**功能**:导出当前活动的文件
|
||||
- 获取活动文件
|
||||
- 验证文件类型(md 或 canvas)
|
||||
- 调用 exportNote()
|
||||
|
||||
### 2. exportNote()
|
||||
**位置**:main.ts:92-135
|
||||
|
||||
**功能**:导出单个文件的主入口
|
||||
- 判断文件类型并分发到不同的处理逻辑
|
||||
- Markdown 文件:读取内容 → 处理资源 → 计算路径 → 写入文件
|
||||
- Canvas 文件:调用 exportCanvasFile()
|
||||
|
||||
### 3. exportCanvasFile()
|
||||
**位置**:main.ts:138-192
|
||||
|
||||
**功能**:专门处理 Canvas 文件导出
|
||||
1. 渲染 Canvas 为 PNG 图片
|
||||
2. 保存图片到 assetsPath(扁平化)
|
||||
3. 计算 .canvas.md 文件路径
|
||||
4. 生成包含 `<Viewer>` 组件的 Markdown 内容
|
||||
5. 写入文件
|
||||
|
||||
**路径规则示例**:
|
||||
```typescript
|
||||
// 保留文件夹 + 嵌套
|
||||
notes/测试用.canvas → docs/notes/测试用.canvas/index.md
|
||||
|
||||
// 仅嵌套
|
||||
notes/测试用.canvas → docs/测试用.canvas/index.md
|
||||
|
||||
// 保留文件夹
|
||||
notes/测试用.canvas → docs/notes/测试用.canvas.md
|
||||
|
||||
// 默认
|
||||
notes/测试用.canvas → docs/测试用.canvas.md
|
||||
```
|
||||
|
||||
### 4. processAssets()
|
||||
**位置**:main.ts:195-308
|
||||
|
||||
**功能**:扫描并处理 Markdown 文件中的资源
|
||||
|
||||
**处理流程**:
|
||||
1. 使用 metadataCache 获取文件的 embeds 和 links
|
||||
2. 分类资源:Canvas 文件 vs 普通资源
|
||||
3. 处理 Canvas:渲染为图片并更新链接为 `<Viewer>` 组件
|
||||
4. 复制普通资源到 assetsPath
|
||||
5. 更新内容中的所有资源链接
|
||||
|
||||
**链接格式支持**:
|
||||
- Markdown 格式:``
|
||||
- Wikilink 格式:`![[path]]`
|
||||
|
||||
### 5. renderCanvas()
|
||||
**位置**:main.ts:368-556
|
||||
|
||||
**功能**:使用 Obsidian 内部 API 将 Canvas 渲染为 PNG 图片
|
||||
|
||||
**技术要点**:
|
||||
- 使用 Electron 的 `webContents.capturePage()` API
|
||||
- 分块渲染:处理大型 Canvas(避免超过 16284px 限制)
|
||||
- 缩放校正:考虑系统缩放和设备像素比
|
||||
- 像素级精确:使用 binary 模式保留原始格式
|
||||
|
||||
**分块渲染算法**:
|
||||
```typescript
|
||||
// 计算分块数量
|
||||
const cols = Math.ceil((bbox.maxX - bbox.minX) / tileWidth);
|
||||
const rows = Math.ceil((bbox.maxY - bbox.minY) / tileHeight);
|
||||
|
||||
// 逐个渲染分块并拼接
|
||||
for (let row = 0; row < rows; row++) {
|
||||
for (let col = 0; col < cols; col++) {
|
||||
// 设置视口位置
|
||||
canvas.x = canvas.tx = startX + col * tileWidth;
|
||||
canvas.y = canvas.ty = startY + row * tileHeight;
|
||||
|
||||
// 捕获并绘制
|
||||
const capturedData = await webContents.capturePage(...);
|
||||
ctx.drawImage(img, col * O * s, row * F * s);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### 6. updateLinksInContent()
|
||||
**位置**:main.ts:311-364
|
||||
|
||||
**功能**:更新内容中的资源链接
|
||||
|
||||
**智能匹配**:
|
||||
尝试多种可能的路径格式:
|
||||
- 完整路径:`notes/image.png`
|
||||
- 相对路径:`image.png`
|
||||
- URL 编码:`notes%2Fimage.png`
|
||||
- 文件名:`image.png`
|
||||
|
||||
**统一输出**:
|
||||
所有资源链接转换为根路径:`/filename.png`
|
||||
|
||||
### 7. updateCanvasLinksInContent()
|
||||
**位置**:main.ts:593-648
|
||||
|
||||
**功能**:将 Canvas 链接转换为 `<Viewer>` 组件
|
||||
|
||||
**转换规则**:
|
||||
```markdown
|
||||
 → <Viewer src="/测试用.canvas.png" />
|
||||
![[测试用.canvas]] → <Viewer src="/测试用.canvas.png" />
|
||||
```
|
||||
|
||||
## 配置选项
|
||||
|
||||
### settings.ts
|
||||
|
||||
```typescript
|
||||
interface vitepressExporterSettings {
|
||||
docsPath: string; // VitePress docs 目录路径,默认 'docs'
|
||||
assetsPath: string; // 资源目录路径,默认 'docs/public'
|
||||
nestNoteFolder: boolean; // 是否为每个笔记创建文件夹,默认 true
|
||||
preserveFolderStructure: boolean; // 是否保留原始文件夹结构,默认 true
|
||||
}
|
||||
```
|
||||
|
||||
### 路径规则矩阵
|
||||
|
||||
| preserveFolderStructure | nestNoteFolder | 输入 | 输出 |
|
||||
|---------|---------|------|------|
|
||||
| true | true | notes/test.md | docs/notes/test/index.md |
|
||||
| true | false | notes/test.md | docs/notes/test.md |
|
||||
| false | true | notes/test.md | docs/test/index.md |
|
||||
| false | false | notes/test.md | docs/test.md |
|
||||
|
||||
## 技术实现要点
|
||||
|
||||
### 1. Binary 模式文件操作
|
||||
|
||||
使用 binary 模式保留文件原始格式:
|
||||
```typescript
|
||||
// 读取
|
||||
const contentBuffer = await vault.readBinary(file);
|
||||
const content = new TextDecoder().decode(contentBuffer);
|
||||
|
||||
// 写入
|
||||
const buffer = new TextEncoder().encode(content);
|
||||
await vault.adapter.writeBinary(path, buffer.buffer);
|
||||
```
|
||||
|
||||
### 2. Obsidian 元数据缓存
|
||||
|
||||
使用 `metadataCache` 解析链接:
|
||||
```typescript
|
||||
const cache = metadataCache.getCache(sourceFile.path);
|
||||
const resolvedLink = metadataCache.getFirstLinkpathDest(link, sourceFile.path);
|
||||
```
|
||||
|
||||
### 3. Electron API 集成
|
||||
|
||||
使用 Obsidian 内部的 Electron API:
|
||||
```typescript
|
||||
const electron = window.electron?.remote;
|
||||
const webContents = electron?.getCurrentWebContents();
|
||||
const capturedData = await webContents.capturePage({ x, y, width, height });
|
||||
```
|
||||
|
||||
### 4. 链接解析兼容性
|
||||
|
||||
支持多种链接格式:
|
||||
- 绝对路径和相对路径
|
||||
- URL 编码和未编码
|
||||
- Markdown 标准格式和 Obsidian Wikilink
|
||||
|
||||
### 5. Canvas 渲染优化
|
||||
|
||||
- **分块渲染**:避免单个 Canvas 过大
|
||||
- **异步处理**:使用 `requestAnimationFrame` 确保渲染完成
|
||||
- **缩放校正**:考虑系统 DPI 设置
|
||||
- **内存管理**:及时释放临时对象(URL.revokeObjectURL)
|
||||
|
||||
## 文件结构
|
||||
|
||||
```
|
||||
.obsidian/plugins/vitepress-exporter/
|
||||
├── src/
|
||||
│ ├── main.ts # 主插件逻辑(650 行)
|
||||
│ └── settings.ts # 设置定义和 UI
|
||||
├── notes/ # 文档和说明
|
||||
├── manifest.json # 插件清单
|
||||
└── package.json # 依赖管理
|
||||
```
|
||||
|
||||
## 依赖项
|
||||
|
||||
- **Obsidian API**:插件框架
|
||||
- **Electron**:Canvas 渲染(桌面版)
|
||||
- **TypeScript**:类型安全
|
||||
|
||||
## 使用场景
|
||||
|
||||
1. **从 Obsidian 迁移到 VitePress**:将个人知识库转换为静态网站
|
||||
2. **技术文档发布**:在 Obsidian 中编写,发布到 VitePress
|
||||
3. **Canvas 可视化**:将 Obsidian Canvas 导出为交互式图片
|
||||
4. **自动化工作流**:结合 CI/CD 实现自动部署
|
||||
|
||||
## 局限性
|
||||
|
||||
1. **平台依赖**:Canvas 渲染仅支持桌面版 Obsidian(需要 Electron)
|
||||
2. **VitePress 特定**:生成的 `<Viewer>` 组件需要在 VitePress 中配置
|
||||
3. **链接转换**:复杂的链接语法可能需要手动调整
|
||||
4. **大型 Canvas**:分块渲染可能耗时较长
|
||||
|
||||
## 未来改进方向
|
||||
|
||||
1. **增量导出**:只导出修改过的文件
|
||||
2. **批量导出**:支持一次性导出整个文件夹
|
||||
3. **配置预设**:保存常用的导出配置
|
||||
4. **错误恢复**:更完善的错误处理和回滚机制
|
||||
5. **性能优化**:并行处理多个文件
|
||||
@@ -1,397 +0,0 @@
|
||||
# Canvas 渲染系统实现
|
||||
|
||||
## 技术栈
|
||||
|
||||
- **渲染方式**: Obsidian Canvas 内部 API (`takeScreenshot`)
|
||||
- **缩放控制**: `canvas.zoom` 属性(对数刻度)
|
||||
- **语言**: TypeScript
|
||||
|
||||
## 核心实现
|
||||
|
||||
### 1. Canvas 捕获流程
|
||||
|
||||
```typescript
|
||||
async renderCanvas(canvasFile: TFile): Promise<Uint8Array | null> {
|
||||
// 1. 获取活动 leaf
|
||||
const activeLeaf = this.app.workspace.getLeaf();
|
||||
if (!activeLeaf) return null;
|
||||
|
||||
// 2. 打开 Canvas 文件
|
||||
await activeLeaf.openFile(canvasFile);
|
||||
|
||||
// 3. 获取 Canvas 对象
|
||||
const canvas = activeLeaf.view.canvas;
|
||||
if (!canvas) return null;
|
||||
|
||||
// 4. 使用内部 API 导出
|
||||
return await this.exportCanvasWithInternalAPI(canvas, canvasFile);
|
||||
}
|
||||
```
|
||||
|
||||
### 2. 使用 Canvas 内部 API
|
||||
|
||||
```typescript
|
||||
async exportCanvasWithInternalAPI(
|
||||
canvas: any,
|
||||
canvasFile: TFile
|
||||
): Promise<Uint8Array | null> {
|
||||
try {
|
||||
// 1. 获取边界框
|
||||
const bbox = canvas.getViewportBBox();
|
||||
const contentWidth = bbox.maxX - bbox.minX;
|
||||
const contentHeight = bbox.maxY - bbox.minY;
|
||||
|
||||
// 2. 设置 zoom = 0 (100% 缩放)
|
||||
const oldZoom = canvas.zoom;
|
||||
canvas.zoom = 0; // 对数刻度:2^0 = 1.0 (100%)
|
||||
|
||||
// 3. 请求重绘
|
||||
canvas.requestFrame();
|
||||
await new Promise(resolve => setTimeout(resolve, 100));
|
||||
await new Promise(resolve => requestAnimationFrame(resolve));
|
||||
|
||||
// 4. 生成文件路径
|
||||
const tempFileName = `temp_canvas_${Date.now()}.png`;
|
||||
const finalFileName = canvasFile.name.replace(".canvas", ".png");
|
||||
const finalPath = `${this.settings.assetsPath}/${finalFileName}`;
|
||||
|
||||
// 5. 获取 vault 绝对路径
|
||||
const vaultBasePath = vault.adapter.basePath;
|
||||
const tempFullPath = `${vaultBasePath}/${tempFileName}`;
|
||||
|
||||
// 6. 调用 takeScreenshot(需要绝对路径)
|
||||
await canvas.takeScreenshot(tempFullPath, false);
|
||||
|
||||
// 7. 等待文件写入完成
|
||||
await new Promise(resolve => setTimeout(resolve, 100));
|
||||
|
||||
// 8. 读取临时文件(使用相对路径)
|
||||
const imageBuffer = await vault.adapter.readBinary(tempFileName);
|
||||
|
||||
if (!imageBuffer || imageBuffer.byteLength === 0) {
|
||||
console.error("Failed to read temporary file");
|
||||
return null;
|
||||
}
|
||||
|
||||
// 9. 删除临时文件
|
||||
await vault.adapter.remove(tempFileName);
|
||||
|
||||
// 10. 写入到最终位置
|
||||
await vault.adapter.writeBinary(finalPath, imageBuffer);
|
||||
|
||||
// 11. 返回 Uint8Array
|
||||
return new Uint8Array(imageBuffer);
|
||||
|
||||
} catch (error) {
|
||||
console.error("exportCanvasWithInternalAPI failed:", error);
|
||||
return null;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### 3. Canvas Zoom 对数刻度
|
||||
|
||||
**关键发现**:`canvas.zoom` 使用对数刻度(base 2)
|
||||
|
||||
| zoom 值 | 缩放比例 | 说明 |
|
||||
|---------|----------|------|
|
||||
| 0 | 100% (2^0) | 原始尺寸,我们要设置的值 |
|
||||
| 1 | 200% (2^1) | 放大 2 倍 |
|
||||
| -1 | 50% (2^-1) | 缩小一半 |
|
||||
| -1.76 | ~30% | Obsidian 默认缩放 |
|
||||
|
||||
**重要**:不要设置 `zoom = 1.0`,这会让 Canvas 放大到 200%!应该设置 `zoom = 0`。
|
||||
|
||||
### 4. 链接更新
|
||||
|
||||
Canvas 引用会被转换为 Viewer 组件:
|
||||
|
||||
```typescript
|
||||
updateCanvasLinksInContent(content: string, canvasFile: TFile, canvasPath: string, imageFileName: string): string {
|
||||
// 支持多种路径格式
|
||||
const possiblePaths = [
|
||||
canvasPath, // 完整路径
|
||||
canvasPath.substring(sourceDir.length + 1), // 相对路径
|
||||
encodeURI(canvasPath), // URL 编码
|
||||
canvasFile.name, // 文件名
|
||||
canvasFile.name.replace('.canvas', ''), // 不带扩展名
|
||||
];
|
||||
|
||||
// 替换 Markdown 格式
|
||||
const markdownRegex = /!\[([^\]]*)\]\(([^)]+)\)/g;
|
||||
content = content.replace(markdownRegex, (match, alt, path) => {
|
||||
if (path匹配) {
|
||||
const relativePath = this.settings.assetsPath.replace('docs/', '');
|
||||
return `<Viewer src="${relativePath}/${imageFileName}" />`;
|
||||
}
|
||||
return match;
|
||||
});
|
||||
|
||||
// 替换 Wikilink 格式
|
||||
const wikilinkRegex = /!\[\[([^\]]+)\]\]/g;
|
||||
content = content.replace(wikilinkRegex, (match, link) => {
|
||||
if (link匹配) {
|
||||
const relativePath = this.settings.assetsPath.replace('docs/', '');
|
||||
return `<Viewer src="${relativePath}/${imageFileName}" />`;
|
||||
}
|
||||
return match;
|
||||
});
|
||||
|
||||
return content;
|
||||
}
|
||||
```
|
||||
|
||||
## 渲染流程
|
||||
|
||||
```
|
||||
1. 打开 Canvas 文件
|
||||
└─> activeLeaf.openFile(canvasFile)
|
||||
|
||||
2. 获取 Canvas 对象
|
||||
└─> activeLeaf.view.canvas
|
||||
|
||||
3. 调用 exportCanvasWithInternalAPI
|
||||
├─> 获取视口边界框
|
||||
├─> 设置 zoom = 0 (100%)
|
||||
├─> 请求重绘
|
||||
├─> 等待 100ms + requestAnimationFrame
|
||||
├─> 调用 takeScreenshot(绝对路径)
|
||||
├─> 读取临时文件
|
||||
├─> 删除临时文件
|
||||
└─> 写入到 docs/assets/
|
||||
|
||||
4. 更新内容中的链接
|
||||
└─> 转换为 <Viewer src="assets/xxx.png" />
|
||||
```
|
||||
|
||||
## 在资源处理中的集成
|
||||
|
||||
Canvas 渲染是资源处理流程的一部分:
|
||||
|
||||
```typescript
|
||||
async processAssets(content: string, sourceFile: TFile): Promise<string> {
|
||||
const cache = metadataCache.getCache(sourceFile.path);
|
||||
const canvasFiles = new Set<string>();
|
||||
|
||||
// 1. 收集 Canvas 文件
|
||||
if (cache.embeds) {
|
||||
for (const embed of cache.embeds) {
|
||||
const resolvedLink = metadataCache.getFirstLinkpathDest(embed.link, sourceFile.path);
|
||||
if (resolvedLink?.extension === 'canvas') {
|
||||
canvasFiles.add(resolvedLink.path);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// 2. 渲染每个 Canvas
|
||||
for (const canvasPath of canvasFiles) {
|
||||
try {
|
||||
const canvasFile = vault.getAbstractFileByPath(canvasPath);
|
||||
if (canvasFile instanceof TFile) {
|
||||
const renderedImage = await this.captureCanvas(canvasFile);
|
||||
if (renderedImage) {
|
||||
const imageFileName = canvasFile.name.replace('.canvas', '.png');
|
||||
const imagePath = `${this.settings.assetsPath}/${imageFileName}`;
|
||||
|
||||
// 确保 assets 目录存在
|
||||
await vault.adapter.mkdir(this.settings.assetsPath);
|
||||
|
||||
// 写入渲染的图片
|
||||
await vault.adapter.writeBinary(imagePath, renderedImage.buffer);
|
||||
|
||||
// 更新内容中的 canvas 引用
|
||||
content = this.updateCanvasLinksInContent(content, canvasFile, canvasPath, imageFileName);
|
||||
}
|
||||
}
|
||||
} catch (error) {
|
||||
console.error(`Failed to render canvas ${canvasPath}:`, error);
|
||||
}
|
||||
}
|
||||
|
||||
return content;
|
||||
}
|
||||
```
|
||||
|
||||
## 优势
|
||||
|
||||
1. **完全使用 Obsidian 内部 API**
|
||||
- 不依赖第三方库(html-to-image)
|
||||
- 兼容性好,Obsidian 升级时应该能正常工作
|
||||
- 代码简洁,维护方便
|
||||
|
||||
2. **正确的缩放控制**
|
||||
- 使用对数刻度的 `zoom` 属性
|
||||
- 设置 `zoom = 0` 获得准确的 100% 缩放
|
||||
- 每个元素都是原始尺寸
|
||||
|
||||
3. **路径处理灵活**
|
||||
- 支持多种路径格式(绝对、相对、URL 编码)
|
||||
- 自动转换为正确的相对路径
|
||||
- 支持 Markdown 和 Wikilink 两种格式
|
||||
|
||||
4. **错误隔离**
|
||||
- 单个 Canvas 渲染失败不影响其他文件
|
||||
- 在控制台输出详细错误信息
|
||||
- 继续处理后续资源
|
||||
|
||||
## 测试方法
|
||||
|
||||
### 1. 基本功能测试
|
||||
|
||||
创建测试 Canvas 文件:
|
||||
- 小尺寸: 800x600
|
||||
- 大尺寸: 4000x3000
|
||||
- 包含多个节点和连接
|
||||
|
||||
### 2. 验证步骤
|
||||
|
||||
1. **创建测试笔记**,包含 Canvas 引用
|
||||
```markdown
|
||||
# 测试笔记
|
||||
|
||||
这是一个 Canvas:
|
||||
![[test.canvas]]
|
||||
```
|
||||
|
||||
2. **执行导出命令**
|
||||
|
||||
3. **检查控制台输出**:
|
||||
```
|
||||
Processing assets for file: test.md
|
||||
Canvas files to render: ['test.canvas']
|
||||
Successfully rendered canvas: test.canvas -> docs/assets/test.png
|
||||
```
|
||||
|
||||
4. **检查输出文件**:
|
||||
- 图片位置:`docs/assets/test.png`
|
||||
- 图片尺寸应该等于 Canvas 的实际内容尺寸
|
||||
- 文字清晰,没有缩水
|
||||
- 导出后的笔记内容被更新
|
||||
|
||||
### 3. 路径格式测试
|
||||
|
||||
测试各种路径格式的 Canvas 引用:
|
||||
|
||||
```markdown
|
||||
![[test.canvas]] # 文件名
|
||||
![[folder/test.canvas]] # 相对路径
|
||||
 # Markdown 格式
|
||||
 # Markdown 相对路径
|
||||
![[test.canvas|别名]] # 带别名
|
||||
 # URL 编码
|
||||
```
|
||||
|
||||
所有格式都应该被正确识别和转换。
|
||||
|
||||
## API 参考
|
||||
|
||||
### Canvas 内部方法
|
||||
|
||||
| 方法 | 参数 | 返回值 | 说明 |
|
||||
|------|------|--------|------|
|
||||
| `getViewportBBox()` | - | `{minX, minY, maxX, maxY}` | 获取视口边界框 |
|
||||
| `takeScreenshot(path, privacy)` | `path: string`, `privacy: boolean` | `Promise<void>` | 截图并保存到文件 |
|
||||
| `requestFrame()` | - | - | 请求重绘 |
|
||||
| `zoom` 属性 | - | `number` | 对数刻度缩放(0 = 100%) |
|
||||
|
||||
### Workspace API
|
||||
|
||||
| 方法 | 参数 | 返回值 | 说明 |
|
||||
|------|------|--------|------|
|
||||
| `getLeaf()` | - | `WorkspaceLeaf` | 获取活动 leaf |
|
||||
| `openFile(file)` | `TFile` | `Promise<void>` | 打开文件 |
|
||||
|
||||
### Vault API
|
||||
|
||||
| 方法 | 参数 | 返回值 | 说明 |
|
||||
|------|------|--------|------|
|
||||
| `adapter.readBinary(path)` | `string` | `Promise<ArrayBuffer>` | 读取二进制文件 |
|
||||
| `adapter.writeBinary(path, data)` | `string, ArrayBuffer` | `Promise<void>` | 写入二进制文件 |
|
||||
| `adapter.mkdir(path)` | `string` | `Promise<void>` | 创建目录 |
|
||||
| `adapter.remove(path)` | `string` | `Promise<void>` | 删除文件 |
|
||||
|
||||
### 重要常量
|
||||
|
||||
- `zoom = 0` → 100% 缩放
|
||||
- `zoom = 1` → 200% 缩放
|
||||
- `zoom = -1` → 50% 缩放
|
||||
- `zoom = Math.log2(scale)` → zoom 和缩放的转换公式
|
||||
|
||||
## 已知问题
|
||||
|
||||
1. **临时文件处理**
|
||||
- `takeScreenshot` 需要**绝对文件系统路径**
|
||||
- 必须先保存到临时文件,然后读取并移动
|
||||
- 临时文件会自动清理
|
||||
|
||||
2. **路径获取**
|
||||
- 使用 `vault.adapter.basePath` 获取 vault 的完整路径
|
||||
- 这是 Obsidian 的内部 API,可能在未来版本中变化
|
||||
|
||||
3. **同步问题**
|
||||
- 需要等待 `takeScreenshot` 完成
|
||||
- 使用 `setTimeout` 和 `requestAnimationFrame` 确保渲染完成
|
||||
- 时间可能需要根据实际情况调整
|
||||
|
||||
## 故障排除
|
||||
|
||||
### Canvas 渲染失败
|
||||
|
||||
**问题**:Canvas 没有被渲染成图片
|
||||
|
||||
**可能原因**:
|
||||
1. Canvas 文件路径不正确
|
||||
2. Canvas 对象获取失败
|
||||
3. `takeScreenshot` 调用失败
|
||||
4. 临时文件读写权限问题
|
||||
|
||||
**解决方法**:
|
||||
- 检查控制台日志
|
||||
- 确认 Canvas 文件存在且可打开
|
||||
- 检查文件系统权限
|
||||
|
||||
### 图片质量差
|
||||
|
||||
**问题**:渲染的图片模糊或尺寸不正确
|
||||
|
||||
**可能原因**:
|
||||
- zoom 值设置不正确
|
||||
- Canvas 节点被折叠
|
||||
|
||||
**解决方法**:
|
||||
- 确认 `zoom = 0`(100%)
|
||||
- 检查 Canvas 是否有折叠的节点
|
||||
- 增加等待时间确保完全渲染
|
||||
|
||||
### 链接没有更新
|
||||
|
||||
**问题**:导出后 Canvas 引用没有被替换
|
||||
|
||||
**可能原因**:
|
||||
- 路径格式不支持
|
||||
- 正则表达式不匹配
|
||||
|
||||
**解决方法**:
|
||||
- 检查链接格式(Markdown vs Wikilink)
|
||||
- 查看控制台日志确认路径匹配
|
||||
- 添加更多路径格式支持
|
||||
|
||||
## 未来改进
|
||||
|
||||
1. **进度反馈**
|
||||
- 添加渲染进度提示
|
||||
- 显示 Canvas 尺寸和预计时间
|
||||
|
||||
2. **错误处理**
|
||||
- 更详细的错误信息
|
||||
- 降级方案(如果 takeScreenshot 不可用)
|
||||
|
||||
3. **性能优化**
|
||||
- 缓存已渲染的 Canvas
|
||||
- 避免重复截图
|
||||
- 并行处理多个 Canvas
|
||||
|
||||
4. **更多格式**
|
||||
- 支持 JPEG、WebP 等格式
|
||||
- 可配置的图片质量
|
||||
- 可配置的分辨率
|
||||
70
src/main.ts
70
src/main.ts
@@ -23,7 +23,7 @@ export default class vitepressExporterPlugin extends Plugin {
|
||||
this.registerEvent(
|
||||
// @ts-ignore
|
||||
this.app.workspace.on("file-menu", (menu: Menu, file: TFile) => {
|
||||
if (file.extension === "md") {
|
||||
if (file.extension === "md" || file.extension === "canvas") {
|
||||
|
||||
menu.addItem((item: MenuItem) => {
|
||||
item
|
||||
@@ -80,8 +80,8 @@ export default class vitepressExporterPlugin extends Plugin {
|
||||
return;
|
||||
}
|
||||
|
||||
if (activeFile.extension !== 'md') {
|
||||
new Notice('Current file is not a Markdown file');
|
||||
if (activeFile.extension !== 'md' && activeFile.extension !== 'canvas') {
|
||||
new Notice('Current file is not a Markdown or canvas file');
|
||||
return;
|
||||
}
|
||||
|
||||
@@ -90,6 +90,11 @@ export default class vitepressExporterPlugin extends Plugin {
|
||||
|
||||
// 导出单个笔记
|
||||
async exportNote(file: TFile) {
|
||||
if (file.extension === 'canvas') {
|
||||
await this.exportCanvasFile(file);
|
||||
return;
|
||||
}
|
||||
|
||||
const { vault } = this.app;
|
||||
|
||||
// 使用 binary 模式读取文件以保留原始格式(包括行尾空格)
|
||||
@@ -129,6 +134,63 @@ export default class vitepressExporterPlugin extends Plugin {
|
||||
console.warn(`Exported ${file.name} to ${docsPath}`);
|
||||
}
|
||||
|
||||
// 导出 canvas 文件
|
||||
async exportCanvasFile(file: TFile) {
|
||||
const { vault } = this.app;
|
||||
|
||||
// 1. 渲染 canvas 为图片
|
||||
const renderedImage = await this.renderCanvas(file);
|
||||
if (!renderedImage) {
|
||||
new Notice(`Failed to render canvas: ${file.name}`);
|
||||
return;
|
||||
}
|
||||
|
||||
// 2. 保存图片到 assetsPath (扁平化存储)
|
||||
const imageFileName = file.name + '.png';
|
||||
const imagePath = `${this.settings.assetsPath}/${imageFileName}`;
|
||||
|
||||
// 确保目标目录存在
|
||||
await vault.adapter.mkdir(this.settings.assetsPath);
|
||||
|
||||
// 写入渲染的图片
|
||||
await vault.adapter.writeBinary(imagePath, renderedImage.buffer);
|
||||
|
||||
console.debug(`Successfully rendered canvas: ${file.path} -> ${imagePath}`);
|
||||
|
||||
// 3. 计算 .canvas.md 文件的输出路径(复用现有逻辑)
|
||||
const fileNameWithoutExt = file.name.replace('.canvas', '');
|
||||
const filePathWithoutExt = file.path.replace('.canvas', '');
|
||||
|
||||
let docsPath: string;
|
||||
if (this.settings.preserveFolderStructure && this.settings.nestNoteFolder) {
|
||||
// 保留文件夹 + 嵌套: notes/some-note.canvas > docs/notes/some-note.canvas/index.md
|
||||
docsPath = `${this.settings.docsPath}/${filePathWithoutExt}.canvas/index.md`;
|
||||
} else if (this.settings.preserveFolderStructure) {
|
||||
// 保留文件夹结构: notes/some-note.canvas > docs/notes/some-note.canvas.md
|
||||
docsPath = `${this.settings.docsPath}/${filePathWithoutExt}.md`;
|
||||
} else if (this.settings.nestNoteFolder) {
|
||||
// 嵌套文件夹: notes/some-note.canvas > docs/some-note.canvas/index.md
|
||||
docsPath = `${this.settings.docsPath}/${fileNameWithoutExt}.canvas/index.md`;
|
||||
} else {
|
||||
// 默认: notes/some-note.canvas > docs/some-note.canvas.md
|
||||
docsPath = `${this.settings.docsPath}/${fileNameWithoutExt}.canvas.md`;
|
||||
}
|
||||
|
||||
// 4. 确保 .canvas.md 目标目录存在
|
||||
const targetDir = docsPath.substring(0, docsPath.lastIndexOf('/'));
|
||||
await vault.adapter.mkdir(targetDir);
|
||||
|
||||
// 5. 生成 .canvas.md 内容
|
||||
const content = `<Viewer src="/${imageFileName}" />`;
|
||||
|
||||
// 6. 写入 .canvas.md 文件
|
||||
const contentBuffer = new TextEncoder().encode(content);
|
||||
await vault.adapter.writeBinary(docsPath, contentBuffer.buffer);
|
||||
|
||||
console.warn(`Exported ${file.name} to ${docsPath}`);
|
||||
new Notice(`Exported ${file.name} to ${docsPath}`);
|
||||
}
|
||||
|
||||
// 处理资源文件
|
||||
async processAssets(content: string, sourceFile: TFile): Promise<string> {
|
||||
const { vault, metadataCache } = this.app;
|
||||
@@ -188,7 +250,7 @@ export default class vitepressExporterPlugin extends Plugin {
|
||||
if (canvasFile instanceof TFile) {
|
||||
const renderedImage = await this.renderCanvas(canvasFile);
|
||||
if (renderedImage) {
|
||||
const imageFileName = canvasFile.name.replace('.canvas', '.png');
|
||||
const imageFileName = canvasFile.name + '.png';
|
||||
// 图片保存到 docs/assets/
|
||||
const imagePath = `${this.settings.assetsPath}/${imageFileName}`;
|
||||
|
||||
|
||||
@@ -9,8 +9,8 @@ export interface vitepressExporterSettings {
|
||||
}
|
||||
|
||||
export const DEFAULT_SETTINGS: vitepressExporterSettings = {
|
||||
docsPath: 'docs',
|
||||
assetsPath: 'docs/public',
|
||||
docsPath: 'wiki',
|
||||
assetsPath: 'wiki/public',
|
||||
nestNoteFolder: true,
|
||||
preserveFolderStructure: true
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user