osx: fix annoying focus behaviour (#689)

OS X has a global menu bar and a per app dock icon. Therefore, all
GUI applications launched from a terminal will become focused - even
if they don’t show any windows. Thereby the terminal loses focus.

Since is it very annoying to re-focus the terminal after each proxmark
client launch, this change makes the client unfocusable during launch
and restores the regular behaviour when a window is created.

client/Makefile

@@ -42,7 +42,7 @@ else
 	ifeq ($(platform),Darwin)
 		LUAPLATFORM = macosx
 		OBJCSRCS = util_darwin.m
-		LDFLAGS += -framework Foundation
+		LDFLAGS += -framework Foundation -framework AppKit
 	else
 		LUALIB +=  -ldl
 		LDLIBS +=  -ltermcap -lncurses

client/proxguiqt.cpp

@@ -26,6 +26,10 @@
 #include <string.h>
 #include "proxgui.h"
 #include <QtGui>
+
+extern "C" {
+#include "util_darwin.h"
+}
 //#include <ctime>
 
 bool g_useOverlays = false;
@@ -60,7 +64,12 @@ void ProxGuiQT::_ShowGraphWindow(void)
 		return;
 
 	if (!plotwidget)
+	{
+#if defined(__MACH__) && defined(__APPLE__)
+		makeFocusable();
+#endif
 		plotwidget = new ProxWidget();
+	}
 
 	plotwidget->show();
 }
@@ -108,6 +117,11 @@ void ProxGuiQT::MainLoop()
 	//start proxmark thread after starting event loop
 	QTimer::singleShot(200, this, SLOT(_StartProxmarkThread()));
 
+#if defined(__MACH__) && defined(__APPLE__)
+	//Prevent the terminal from loosing focus during launch by making the client unfocusable
+	makeUnfocusable();
+#endif
+
 	plotapp->exec();
 }
 

client/util_darwin.h

@@ -14,4 +14,7 @@
 void disableAppNap(const char* reason);
 void enableAppNap();
 
+void makeUnfocusable();
+void makeFocusable();
+
 #endif

client/util_darwin.m

@@ -12,6 +12,7 @@
 
 #import <Foundation/NSString.h>
 #import <Foundation/NSProcessInfo.h>
+#import <AppKit/NSApplication.h>
 
 static id activity = nil;
 
@@ -38,3 +39,17 @@ void enableAppNap() {
 void disableAppNap(const char* reason) { }
 void enableAppNap() { }
 #endif
+
+//OS X Version 10.6 is defined in OS X 10.6 and later
+#if defined(MAC_OS_X_VERSION_10_6)
+void makeUnfocusable() {
+	[NSApp setActivationPolicy:NSApplicationActivationPolicyProhibited];
+}
+
+void makeFocusable() {
+	[NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
+}
+#else
+void makeUnfocusable() { }
+void makeFocusable() { }
+#endif