Files
ele-HeiXiu/electron/main/ipc/canvas/thumbnail.ts
YoungestSongMo 136a17c0bf feat: 任务列表右键菜单回调 + 主进程下载 + sharp 缩略图 + IPC 精简重构
- 任务右键菜单:实现打开输出目录(inputs/outputs/.cache 结构)、
    复制资源链接、重新编辑、再次生成、拉取结果、重新下载、收藏、删除记录
  - 主进程下载:通过 Electron net 模块绕过 CORS,支持 CDN 媒体文件下载
  - sharp 缩略图:替换 nativeImage,支持 4K/8K+ 大尺寸素材的流式处理
  - IPC 精简:40+ 冗余通道 → 15 个分组通道,移除未使用的 preload 桥接方法
  - 任务存储:新增收藏字段、schema 迁移、task-store 持久化
  - 清理废弃模块:canvas-ipc / updater / request / pricing

refactor: IPC/Preload/Services 模块化拆分 — 单一职责 + 向后兼容

  主要变更:
  - shared/constants/ipc-channels.ts → ipc/ 模块 (base/storage/canvas/updater)
  - electron/preload.ts → preload/ 模块 (base/safe-storage/file-storage/canvas)
  - electron/main/ipc/canvas-ipc.ts → canvas/ 模块 (types/walk/sidecar/mime/thumbnail)
  - electron/main/ipc/storage-ipc.ts → 提取 utils/ (path/download/thumbnail)
  - electron/main/updater.ts → updater/ 模块 (provider/platform-updaters)
  - src/services/request.ts → request/ 模块 (token/interceptors/methods)
  - src/shared/utils/pricing.ts → pricing/ 模块 (types/helpers/format/calculate/fields)
  - src/modules/home/center/views/ModelInputForm.tsx → 提取 utils + DependentFormItem

  架构优化:
  - 所有拆分均保持向后兼容(旧导入路径仍可用)
  - TypeScript 编译通过 ✓
  - 每个模块单一职责,平均 ~130 行
2026-07-03 11:13:36 +08:00

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// ============================================================
// canvas/thumbnail.ts — 画布缩略图生成
//
// 职责:
// - 生成画布专用缩略图(返回 base64 数据)
// - 支持缓存优先策略(.cache 目录)
//
// 优先级:
// 1. .cache/{filename}.webp — 预生成 WEBP 缩略图(最快)
// 2. .cache/{filename} — 预生成 PNG 缩略图
// 3. sharp — 实时缩放(可选依赖)
// 4. 原始文件字节 — 浏览器端缩放回退
// ============================================================
import fs from 'node:fs';
import path from 'node:path';
import sharp from 'sharp';
import { getMimeType } from './mime';
import type { ThumbnailResult } from './types';
/**
* 生成画布缩略图。
*
* @param filePath - 源文件路径
* @param size - 缩略图尺寸
* @returns 缩略图数据base64
*/
export async function generateCanvasThumbnail(
filePath: string,
size: number,
): Promise<ThumbnailResult> {
const dir = path.dirname(filePath);
const baseName = path.basename(filePath);
const cacheDir = path.join(dir, '.cache');
// ── 优先级 1.cache/{filename}.webp ──
const cachedWebp = path.join(cacheDir, `${baseName}.webp`);
if (fs.existsSync(cachedWebp)) {
const buffer = fs.readFileSync(cachedWebp);
return {
data: buffer.toString('base64'),
mimeType: 'image/webp',
width: 0,
height: 0,
};
}
// ── 优先级 2.cache/{filename}PNG 副本) ──
const cachedPng = path.join(cacheDir, baseName);
if (fs.existsSync(cachedPng)) {
const buffer = fs.readFileSync(cachedPng);
return {
data: buffer.toString('base64'),
mimeType: 'image/png',
width: 0,
height: 0,
};
}
if (sharp) {
const image = sharp(filePath);
const metadata = await image.metadata();
const resized = await image
.resize(size, size, { fit: 'inside', withoutEnlargement: true })
.jpeg({ quality: 85 })
.toBuffer();
return {
data: resized.toString('base64'),
mimeType: 'image/jpeg',
width: metadata.width || 0,
height: metadata.height || 0,
};
}
// ── 优先级 4回退原始文件 ──
const buffer = fs.readFileSync(filePath);
const mimeType = getMimeType(filePath);
return {
data: buffer.toString('base64'),
mimeType,
width: 0,
height: 0,
};
}