From 7132d5ac691ac59d2d6ac801c57c7da43c42003b Mon Sep 17 00:00:00 2001
From: Dreamoochy <j.i.ganeev@gmail.com>
Date: Sun, 25 Feb 2024 15:52:41 +0300
Subject: [PATCH] Added Multi Commander support

---
 .../QuickLook.Native32/MultiCommander.cpp     | 98 +++++++++++++++++++
 .../QuickLook.Native32/MultiCommander.h       | 37 +++++++
 2 files changed, 135 insertions(+)
 create mode 100644 QuickLook.Native/QuickLook.Native32/MultiCommander.cpp
 create mode 100644 QuickLook.Native/QuickLook.Native32/MultiCommander.h

diff --git a/QuickLook.Native/QuickLook.Native32/MultiCommander.cpp b/QuickLook.Native/QuickLook.Native32/MultiCommander.cpp
new file mode 100644
index 0000000..025250f
--- /dev/null
+++ b/QuickLook.Native/QuickLook.Native32/MultiCommander.cpp
@@ -0,0 +1,98 @@
+// This file is part of QuickLook program.
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "stdafx.h"
+#include "MultiCommander.h"
+
+HWND     MultiCommander::hMsgWnd          = nullptr;
+HANDLE   MultiCommander::hGetResultEvent  = nullptr;
+PCHAR    MultiCommander::pCurrentItemPath = nullptr;
+
+void MultiCommander::GetSelected(PWCHAR buffer)
+{
+    if (false == PrepareMessageWindow()) { 
+        return;
+    }
+
+    COPYDATASTRUCT cds;
+	cds.dwData = MULTICMD_CPF_GETCURITEMFULL | MULTICMD_CPF_SOURCE;
+	cds.cbData = 0;
+	cds.lpData = nullptr;
+
+    ResetEvent(hGetResultEvent);
+
+    auto ret = SendMessage(
+                   FindWindow(MULTICMD_CLASS, nullptr),
+                   WM_COPYDATA,
+                   reinterpret_cast<WPARAM>(hMsgWnd),
+		           reinterpret_cast<LPARAM>(&cds)
+               );
+
+	if (!ret || WAIT_OBJECT_0 != WaitForSingleObject(hGetResultEvent, 2000)) {
+        return;
+	}
+
+    auto path = reinterpret_cast<PWCHAR>(pCurrentItemPath);
+    wcscpy_s(buffer, wcslen(path) + 1, path);
+
+    delete[] pCurrentItemPath;
+    pCurrentItemPath = nullptr;
+}
+
+bool MultiCommander::PrepareMessageWindow()
+{
+    if (nullptr == hMsgWnd) {
+        WNDCLASSEX wx = {};
+
+        wx.cbSize        = sizeof(WNDCLASSEX);
+        wx.lpfnWndProc   = msgWindowProc;
+        wx.lpszClassName = MULTICMD_MSGWINDOW_CLASS;
+
+        if (RegisterClassEx(&wx))
+            hMsgWnd = CreateWindowEx(0, MULTICMD_MSGWINDOW_CLASS, L"", 0, 0, 0, 0, 0, HWND_MESSAGE, nullptr, nullptr, nullptr);
+
+        if (nullptr == hMsgWnd) {
+            return false;
+        }
+    }
+
+    if (nullptr == hGetResultEvent) {
+        hGetResultEvent = CreateEvent(nullptr, TRUE, FALSE, nullptr);
+    }
+
+    return (nullptr != hGetResultEvent);
+}
+
+LRESULT CALLBACK MultiCommander::msgWindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+    switch (uMsg)
+	{
+		case WM_COPYDATA:
+		{
+            delete[] pCurrentItemPath;
+
+			auto cds = reinterpret_cast<PCOPYDATASTRUCT>(lParam);
+			auto buf = static_cast<PCHAR>(cds->lpData);
+
+			pCurrentItemPath = new CHAR[cds->cbData + 1]{ '\0' };
+			memcpy(pCurrentItemPath, buf, cds->cbData);
+
+            SetEvent(hGetResultEvent);
+            return 0;
+		}
+		default:
+            return DefWindowProc(hWnd, uMsg, wParam, lParam);
+	}
+}
diff --git a/QuickLook.Native/QuickLook.Native32/MultiCommander.h b/QuickLook.Native/QuickLook.Native32/MultiCommander.h
new file mode 100644
index 0000000..44074f3
--- /dev/null
+++ b/QuickLook.Native/QuickLook.Native32/MultiCommander.h
@@ -0,0 +1,37 @@
+// This file is part of QuickLook program.
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#pragma once
+
+#define MULTICMD_CPF_GETCURITEMFULL 0x00000010L // Get full path of current item (file or folder) in focus
+#define MULTICMD_CPF_SOURCE         0x00000400L // Go to the new path in the source panel side
+
+#define MULTICMD_CLASS              L"MultiCommander MainWnd"
+#define MULTICMD_MSGWINDOW_CLASS    L"QuickLook.Native.MultiCmd.MsgWindow"
+
+class MultiCommander
+{
+public:
+	static void GetSelected(PWCHAR buffer);
+    static bool PrepareMessageWindow();
+    MultiCommander() = delete;
+private:
+    static HWND     hMsgWnd;
+	static HANDLE   hGetResultEvent;
+	static PCHAR    pCurrentItemPath;
+
+    static LRESULT CALLBACK msgWindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+};
+