Merge pull request 'feat(plugins): 截图前检测 CAD 窗口遮挡并自动置前' (#7) from home-lenovo-legion-r9000/home-ai-dev into main
Reviewed-on: #7
This commit was merged in pull request #7.
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@@ -58,6 +58,11 @@ type: project
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这是 AutoCAD 官方 RX 自动加载机制，比 `acaddoc.lsp` + LISP 更直接。
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- AutoCAD 2020 安装于 `C:/Program Files/Autodesk/AutoCAD 2020/`；用户配置目录
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`C:/Users/gjm/AppData/Roaming/Autodesk/AutoCAD 2020/R23.1/chs/`（`acaddoc.lsp` 已用于 PDF2CAD，勿覆盖）。
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- **改 `cad_mcp_plugins` 后重链接必须先关 CAD**：插件 DLL 被 CAD 进程持有（`LNK1168: cannot open
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...dll for writing`）。模板 `cad-mcp-frame.json` 里的 `"hot_reload": true` **只是占位、代码未实现**，
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`mcp_Tools::clear()`（唯一 `FreeLibrary` 处）仅在 ARX 卸载时调用 → **没有热重载**。
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流程：关 CAD → `cmake --build --preset R230 --config Debug` → 重启 `acad.exe`（`acad.rx` 自动加载）
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→ 轮询 `127.0.0.1:8080` 监听。编译阶段可先行（语法错误会被提前暴露，只有链接会因占用失败）。
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## 验证结论（2026-10-13 实测通过）
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@@ -66,6 +66,69 @@ namespace
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free(pImageCodecInfo);
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return -1;
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}
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// 判断窗口客户区中心点是否被其它窗口遮挡。
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// 原理：取客户区中心换算到屏幕坐标，用 WindowFromPoint 取该点最顶层窗口，
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// 若其根窗口与目标窗口的根窗口不同，即视为被遮挡。
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bool IsWindowOccluded(HWND hwnd)
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{
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if (!hwnd || !::IsWindow(hwnd))
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return false;
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RECT rc;
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if (!::GetClientRect(hwnd, &rc))
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return false;
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POINT pt;
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pt.x = (rc.left + rc.right) / 2;
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pt.y = (rc.top + rc.bottom) / 2;
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::ClientToScreen(hwnd, &pt);
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HWND hAtPoint = ::WindowFromPoint(pt);
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if (!hAtPoint)
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return false;
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return ::GetAncestor(hAtPoint, GA_ROOT) != ::GetAncestor(hwnd, GA_ROOT);
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}
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// 把窗口强制置到前台并重绘。
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// SetForegroundWindow 在调用进程不是前台进程时会被系统忽略，故先用
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// AttachThreadInput 把当前线程与前台线程的输入队列挂接，再设置前台窗口。
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bool ForceWindowForeground(HWND hwnd)
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{
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if (!hwnd || !::IsWindow(hwnd))
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return false;
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if (::IsIconic(hwnd))
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::ShowWindow(hwnd, SW_RESTORE);
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if (!::IsWindowVisible(hwnd))
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::ShowWindow(hwnd, SW_SHOW);
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if (::GetForegroundWindow() == hwnd)
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return true;
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HWND hFore = ::GetForegroundWindow();
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DWORD foreThread = hFore ? ::GetWindowThreadProcessId(hFore, NULL) : 0;
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DWORD thisThread = ::GetCurrentThreadId();
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bool attached = false;
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if (foreThread != 0 && foreThread != thisThread)
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attached = (::AttachThreadInput(foreThread, thisThread, TRUE) != 0);
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::SetWindowPos(hwnd, HWND_TOP, 0, 0, 0, 0,
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SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW);
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::BringWindowToTop(hwnd);
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::SetForegroundWindow(hwnd);
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if (attached)
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::AttachThreadInput(foreThread, thisThread, FALSE);
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// 同步重绘，避免截到旧画面（RDW_UPDATENOW 会立即处理 WM_PAINT）
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::RedrawWindow(hwnd, NULL, NULL,
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RDW_INVALIDATE | RDW_UPDATENOW | RDW_ALLCHILDREN);
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return ::GetForegroundWindow() == hwnd;
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}
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}
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class mcp_Tool_ViewportScreenshot: public mcp_Tool
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@@ -78,7 +141,18 @@ public:
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if (!hWnd)
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return mcp_Tool_Utility::make_error(-32000, L"无法获取CAD绘图区窗口句柄");
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// 2. 初始化 GDI+
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// 2. 确保窗口在前台：GDI 抓屏读的是屏幕内容，被其它窗口遮挡就会截到别的窗口。
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// 先尝试把 CAD 主窗口置前并重绘，再记录是否仍被遮挡。
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bool wasOccluded = IsWindowOccluded(hWnd);
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if (wasOccluded || ::GetForegroundWindow() != ::GetAncestor(hWnd, GA_ROOT))
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{
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HWND hMain = adsw_acadMainWnd();
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ForceWindowForeground(hMain ? hMain : hWnd);
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::Sleep(120); // 留一点时间给 DWM 合成，避免截到旧帧
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}
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bool stillOccluded = IsWindowOccluded(hWnd);
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// 3. 初始化 GDI+
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Gdiplus::GdiplusStartupInput gdiplusStartupInput;
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ULONG_PTR gdiplusToken;
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Gdiplus::GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
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@@ -86,7 +160,7 @@ public:
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std::string base64Result;
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bool success = false;
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// 3. 开始 Windows GDI 抓屏逻辑 (使用花括号限定生命周期)
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// 4. 开始 Windows GDI 抓屏逻辑 (使用花括号限定生命周期)
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{
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RECT rc;
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GetClientRect(hWnd, &rc);
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@@ -139,13 +213,23 @@ public:
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ReleaseDC(hWnd, hdcScreen);
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}
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// 4. 关闭 GDI+
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// 5. 关闭 GDI+
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Gdiplus::GdiplusShutdown(gdiplusToken);
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// 5. 按照 MCP 多模态协议返回数据
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// 6. 按照 MCP 多模态协议返回数据
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if (success)
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{
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return mcp_Tool_Utility::make_mixed_result(L"已成功截取 AutoCAD 当前视口画面。", base64Result, "image/png");
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std::wstring msg = L"已成功截取 AutoCAD 当前视口画面。";
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if (stillOccluded)
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{
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// 窗口被遮挡时 GDI 抓屏会读到遮挡窗口的内容，截图不可靠，显式提示。
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msg += L"（警告：CAD 绘图区可能仍被其它窗口遮挡，截图内容可能不准确）";
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}
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else if (wasOccluded)
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{
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msg += L"（已将 CAD 窗口置前，避免截到遮挡窗口）";
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}
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return mcp_Tool_Utility::make_mixed_result(msg, base64Result, "image/png");
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}
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else
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{
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