From 173aaca316daae968fc82cbaa1e333610ec847a4 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Mon, 18 Nov 2019 15:25:51 +0100
Subject: [server] Periodically deactivate xscreensaver when clients are
 connected

---
 src/server/util/platform/screensaver.cpp | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

(limited to 'src/server/util/platform/screensaver.cpp')

diff --git a/src/server/util/platform/screensaver.cpp b/src/server/util/platform/screensaver.cpp
index cdd6ee1..569a4a3 100644
--- a/src/server/util/platform/screensaver.cpp
+++ b/src/server/util/platform/screensaver.cpp
@@ -3,6 +3,7 @@
 #include <QX11Info>
 #include <QStringList>
 #include <QProcess>
+#include <QTimer>
 #include <X11/Xlib.h>
 
 #ifdef X11_Xscreensaver_FOUND
@@ -17,6 +18,7 @@ namespace {
 	Display *display = nullptr;
 	bool extensionSupported = false;
 	bool dpmsSupported = false;
+	QTimer *timer = nullptr;
 
 	bool init()
 	{
@@ -51,16 +53,25 @@ namespace ScreenSaver {
 			return;
 		}
 #endif
-		// TODO: Maybe try some fallback, call xset, or trigger some event periodically
+		if (allow) {
+			if (timer != nullptr) {
+				timer->stop();
+			}
+		} else {
+			if (timer == nullptr) {
+				timer = new QTimer;
+				QObject::connect(timer, &QTimer::timeout, forceUnlockAndScreenOn);
+			}
+			timer->setSingleShot(false);
+			timer->start(55000);
+		}
 	}
 
 	void forceUnlockAndScreenOn()
 	{
 		if (!init())
 			return;
-		QProcess process;
-		process.start("xscreensaver-command", QStringList() << "-deactivate");
-		process.waitForFinished(100);
+		QProcess::startDetached("xscreensaver-command", QStringList() << "-deactivate");
 #ifdef X11_dpms_FOUND
 		CARD16 power_level;
 		BOOL state;
-- 
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