impr: Refactored forwarder executable and add lots more information to it

main/gui/source/messaging/win.cpp

@@ -0,0 +1,84 @@
+#if defined(OS_WINDOWS)
+
+#include "messaging.hpp"
+
+#include <hex/api/imhex_api.hpp>
+#include <hex/helpers/logger.hpp>
+
+#include <windows.h>
+
+namespace hex::messaging {
+
+    std::optional<HWND> getImHexWindow() {
+
+        HWND imhexWindow = 0;
+        
+        ::EnumWindows([](HWND hWnd, LPARAM ret) -> BOOL {
+            // Get the window name
+            auto length = ::GetWindowTextLength(hWnd);
+            std::string windowName(length + 1, '\x00');
+            ::GetWindowText(hWnd, windowName.data(), windowName.size());
+
+            // Check if the window is visible and if it's an ImHex window
+            if (::IsWindowVisible(hWnd) == TRUE && length != 0) {
+                if (windowName.starts_with("ImHex")) {
+                    // it's our window, return it and stop iteration
+                    *reinterpret_cast<HWND*>(ret) = hWnd;
+                    return FALSE;
+                }
+            }
+
+            // continue iteration
+            return TRUE;
+
+        }, reinterpret_cast<LPARAM>(&imhexWindow));
+
+        if (imhexWindow == 0) return { };
+        else return imhexWindow;
+    }
+
+    void sendToOtherInstance(const std::string &eventName, const std::vector<u8> &eventData) {
+        log::debug("Sending event {} to another instance (not us)", eventName);
+
+        // Get the window we want to send it to
+        HWND imHexWindow = *getImHexWindow();
+
+        // Create the message
+        // TODO actually send all arguments and not just the eventName
+        
+        std::vector<u8> fulleventData(eventName.begin(), eventName.end());
+        fulleventData.push_back('\0');
+
+        fulleventData.insert(fulleventData.end(), eventData.begin(), eventData.end());
+        
+        u8 *data = &fulleventData[0];
+        DWORD dataSize = static_cast<DWORD>(fulleventData.size());
+
+        COPYDATASTRUCT message = {
+            .dwData = 0,
+            .cbData = dataSize,
+            .lpData = data
+        };
+
+        // Send the message
+        SendMessage(imHexWindow, WM_COPYDATA, reinterpret_cast<WPARAM>(imHexWindow), reinterpret_cast<LPARAM>(&message));
+
+    }
+
+    bool setupNative() {
+
+        constexpr static auto UniqueMutexId = "ImHex/a477ea68-e334-4d07-a439-4f159c683763";
+
+        // check if an ImHex instance is already running by opening a global mutex
+        HANDLE globalMutex = OpenMutex(MUTEX_ALL_ACCESS, FALSE, UniqueMutexId);
+        if (globalMutex == nullptr) {
+            // If no ImHex instance is running, create a new global mutex
+            globalMutex = CreateMutex(nullptr, FALSE, UniqueMutexId);
+            return true;
+        } else {
+            return false;
+        }
+    }
+}
+
+#endif