AppNap: add AppNap support for OS X.

This allows us to disable App Nap while connected to a server.

People have reported problems with Mumble on El Capitan where
App Nap was identified as the culprit.

Fixes #1863

src/mumble/AppNap.h

@@ -0,0 +1,37 @@
+/* Copyright (C) 2015, Mikkel Krautz <mikkel@krautz.dk>
+
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+   - Redistributions in binary form must reproduce the above copyright notice,
+     this list of conditions and the following disclaimer in the documentation
+     and/or other materials provided with the distribution.
+   - Neither the name of the Mumble Developers nor the names of its
+     contributors may be used to endorse or promote products derived from this
+     software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef MUMBLE_MUMBLE_APPNAP_H_
+#define MUMBLE_MUMBLE_APPNAP_H_
+
+/// MUSuppressAppNap suppresses OS X's App Nap feature.
+void MUSuppressAppNap(bool suppress);
+
+#endif

src/mumble/AppNap.mm

@@ -0,0 +1,60 @@
+/* Copyright (C) 2015, Mikkel Krautz <mikkel@krautz.dk>
+
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+   - Redistributions in binary form must reproduce the above copyright notice,
+     this list of conditions and the following disclaimer in the documentation
+     and/or other materials provided with the distribution.
+   - Neither the name of the Mumble Developers nor the names of its
+     contributors may be used to endorse or promote products derived from this
+     software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include "mumble_pch.hpp"
+
+static bool appNapSuppressed = false;
+
+void MUSuppressAppNap(bool suppress) {
+	NSProcessInfo *processInfo = [NSProcessInfo processInfo];
+	if (![processInfo respondsToSelector:@selector(disableAutomaticTermination:)]) {
+		return;
+	}
+
+	if (suppress == appNapSuppressed) {
+		qWarning("AppNap: attempt to set AppNap suppression state to %s while already in that state.", suppress ? "true" : "false");
+		return;
+	}
+
+	QString translatedReason = QApplication::tr("Mumble is currently connected to a server");
+	NSString *reason = const_cast<NSString *>(reinterpret_cast<const NSString *>(CFStringCreateWithCharacters(kCFAllocatorDefault, reinterpret_cast<const UniChar *>(translatedReason.unicode()), translatedReason.length())));
+
+	if (suppress) {
+		[[NSProcessInfo processInfo] disableAutomaticTermination:reason];
+		qWarning("AppNap: suppressed with reason: '%s'", qPrintable(translatedReason));
+	} else {
+		[[NSProcessInfo processInfo] enableAutomaticTermination:reason];
+		qWarning("AppNap: re-enabled, was suppressed with reason: '%s'", qPrintable(translatedReason));
+	}
+
+	appNapSuppressed = suppress;
+
+	[reason release];
+}

src/mumble/MainWindow.cpp

@@ -75,6 +75,10 @@
 #include "TaskList.h"
 #endif
 
+#ifdef Q_OS_MAC
+#include "AppNap.h"
+#endif
+
 #ifdef USE_COCOA
 #include "ConfigDialog_macx.h"
 #endif
@@ -2662,6 +2666,11 @@ void MainWindow::serverConnected() {
 #endif
 	g.iCodecBeta = 0;
 
+#ifdef Q_OS_MAC
+	// Suppress AppNap while we're connected to a server.
+	MUSuppressAppNap(true);
+#endif
+
 	g.l->clearIgnore();
 	g.l->setIgnore(Log::UserJoin);
 	g.l->setIgnore(Log::OtherSelfMute);
@@ -2712,6 +2721,11 @@ void MainWindow::serverDisconnected(QAbstractSocket::SocketError err, QString re
 	qteChat->setEnabled(false);
 	updateTrayIcon();
 
+#ifdef Q_OS_MAC
+	// Remove App Nap suppression now that we're disconnected.
+	MUSuppressAppNap(false);
+#endif
+
 	QString uname, pw, host;
 	unsigned short port;
 	g.sh->getConnectionInfo(host, port, uname, pw);

src/mumble/mumble.pro

@@ -452,9 +452,9 @@ unix {
 
     LIBS += -framework Security -framework SecurityInterface -framework ApplicationServices
 
-    HEADERS *= GlobalShortcut_macx.h ConfigDialogDelegate.h
+    HEADERS *= GlobalShortcut_macx.h ConfigDialogDelegate.h AppNap.h
     SOURCES *= SharedMemory_unix.cpp
-    OBJECTIVE_SOURCES *= TextToSpeech_macx.mm GlobalShortcut_macx.mm os_macx.mm Log_macx.mm
+    OBJECTIVE_SOURCES *= TextToSpeech_macx.mm GlobalShortcut_macx.mm os_macx.mm Log_macx.mm AppNap.mm
 
     !CONFIG(no-cocoa) {
         DEFINES *= USE_COCOA