SYNERGY-1088 Windows client ignores prevent sleeping option

src/lib/platform/MSWindowsPowerManager.cpp

@@ -0,0 +1,37 @@
+/*
+ * synergy -- mouse and keyboard sharing utility
+ * Copyright (C) 2012-2021 Symless Ltd.
+ * Copyright (C) 2008 Volker Lanz (vl@fidra.de)
+ *
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file LICENSE that should have accompanied this file.
+ *
+ * This package 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 "MSWindowsPowerManager.h"
+#include "arch/win32/ArchMiscWindows.h"
+
+MSWindowsPowerManager::~MSWindowsPowerManager()
+{
+    enableSleep();
+}
+
+void MSWindowsPowerManager::disableSleep()
+{
+    ArchMiscWindows::addBusyState(ArchMiscWindows::kSYSTEM);
+    ArchMiscWindows::addBusyState(ArchMiscWindows::kDISPLAY);
+}
+
+void MSWindowsPowerManager::enableSleep()
+{
+    // allow the system to enter power saving mode
+    ArchMiscWindows::removeBusyState(ArchMiscWindows::kSYSTEM);
+    ArchMiscWindows::removeBusyState(ArchMiscWindows::kDISPLAY);
+}

src/lib/platform/MSWindowsPowerManager.h

@@ -0,0 +1,38 @@
+/*
+ * synergy -- mouse and keyboard sharing utility
+ * Copyright (C) 2012-2021 Symless Ltd.
+ * Copyright (C) 2008 Volker Lanz (vl@fidra.de)
+ *
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file LICENSE that should have accompanied this file.
+ *
+ * This package 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/>.
+ */
+#ifndef MSWINDOWSPOWERMANAGER_H
+#define MSWINDOWSPOWERMANAGER_H
+
+
+class MSWindowsPowerManager
+{
+public:
+    ~MSWindowsPowerManager();
+
+    /**
+     * @brief Prevents the system from sleep automatically
+     */
+    void disableSleep();
+
+     /**
+      * @brief Enable automatically sleeping
+      */
+     void enableSleep();
+};
+
+#endif // MSWINDOWSPOWERMANAGER_H

src/lib/platform/MSWindowsScreen.cpp

@@ -164,6 +164,10 @@ MSWindowsScreen::MSWindowsScreen(
             LOG((CLOG_ERR "failed to get desktop path, no drop target available, error=%d", GetLastError()));
         }
 
+        if (App::instance().argsBase().m_preventSleep) {
+            m_powerManager.disableSleep();
+        }
+
         OleInitialize(0);
         m_dropWindow = createDropWindow(m_class, "DropWindow");
         m_dropTarget = new MSWindowsDropTarget();
@@ -248,11 +252,6 @@ MSWindowsScreen::enable()
         // watch jump zones
         m_hook.setMode(kHOOK_WATCH_JUMP_ZONE);
     }
-
-    if (App::instance().argsBase().m_preventSleep) {
-        ArchMiscWindows::addBusyState(ArchMiscWindows::kSYSTEM);
-        ArchMiscWindows::addBusyState(ArchMiscWindows::kDISPLAY);
-    }
 }
 
 void
@@ -268,11 +267,6 @@ MSWindowsScreen::disable()
         // enable special key sequences on win95 family
         enableSpecialKeys(true);
     }
-    else {
-        // allow the system to enter power saving mode
-        ArchMiscWindows::removeBusyState(ArchMiscWindows::kSYSTEM);
-        ArchMiscWindows::removeBusyState(ArchMiscWindows::kDISPLAY);
-    }
 
     // tell key state
     m_keyState->disable();

src/lib/platform/MSWindowsScreen.h

@@ -19,6 +19,7 @@
 #pragma once
 
 #include "platform/MSWindowsHook.h"
+#include "platform/MSWindowsPowerManager.h"
 #include "synergy/PlatformScreen.h"
 #include "synergy/DragInformation.h"
 #include "platform/synwinhk.h"
@@ -374,4 +375,5 @@ private:
     // -1 for natural scrolling direction, 1 otherwise
     SInt32                    m_scrollDirectionMouse = 1;
     SInt32                    m_scrollDirectionTouchpad = 1;
+    MSWindowsPowerManager     m_powerManager;
 };