From 770e36c10cd17cdd8619ae5cb39196624204a064 Mon Sep 17 00:00:00 2001
From: Marco Schmid <marco@marcoschmid.me>
Date: Tue, 9 Oct 2018 18:37:51 +0200
Subject: [PATCH] added winapi-call to flush clipboard (#778)

---
 src/RunGui.cpp             |  9 +++++++++
 src/util/WindowsHelper.cpp | 12 ++++++++++++
 src/util/WindowsHelper.hpp |  2 ++
 3 files changed, 23 insertions(+)

diff --git a/src/RunGui.cpp b/src/RunGui.cpp
index e342ca7c1..04cb7985a 100644
--- a/src/RunGui.cpp
+++ b/src/RunGui.cpp
@@ -11,6 +11,10 @@
 #include "singletons/Updates.hpp"
 #include "widgets/dialogs/LastRunCrashDialog.hpp"
 
+#ifdef USEWINSDK
+#    include "util/WindowsHelper.hpp"
+#endif
+
 #ifdef C_USE_BREAKPAD
 #    include <QBreakpadHandler.h>
 #endif
@@ -133,6 +137,11 @@ void runGui(QApplication &a, Paths &paths, Settings &settings)
 
     chatterino::NetworkManager::deinit();
 
+#ifdef USEWINSDK
+	// flushing windows clipboard to keep copied messages
+    flushClipboard();
+#endif
+
     _exit(0);
 }
 }  // namespace chatterino
diff --git a/src/util/WindowsHelper.cpp b/src/util/WindowsHelper.cpp
index 38ca74698..c87d31561 100644
--- a/src/util/WindowsHelper.cpp
+++ b/src/util/WindowsHelper.cpp
@@ -34,6 +34,18 @@ boost::optional<UINT> getWindowDpi(HWND hwnd)
     return boost::none;
 }
 
+typedef HRESULT(CALLBACK *OleFlushClipboard_)();
+
+void flushClipboard()
+{
+    static HINSTANCE ole32 = LoadLibrary(L"Ole32.dll");
+    if (ole32 != nullptr) {
+        if (auto oleFlushClipboard = OleFlushClipboard_(GetProcAddress(ole32, "OleFlushClipboard"))) {
+            oleFlushClipboard();
+        }
+    }
+}
+
 }  // namespace chatterino
 
 #endif
diff --git a/src/util/WindowsHelper.hpp b/src/util/WindowsHelper.hpp
index f02bb1362..6e20b1e73 100644
--- a/src/util/WindowsHelper.hpp
+++ b/src/util/WindowsHelper.hpp
@@ -8,6 +8,8 @@
 namespace chatterino {
 
 boost::optional<UINT> getWindowDpi(HWND hwnd);
+void flushClipboard();
+
 
 }  // namespace chatterino