build: added script for creating MacOSX app bundle

This change makes it possible to create a MacOSX app bundle of either Debug or Release builds:
* The script setup/MacOSX/bundle_install.sh is configured by cmake to be placed in the apps Debug and Release folders.
* Execution of bundle_install.sh creates the bundle file structure and copies binaries, libs, frameworks and resources
into it.
* The script uses install_name_tool to reconfigure the dynamic library paths and framework paths of the binary, so they
won't point to the system libraries, but to the locations in the bundle instead.
* An Info.plist file is also configured by cmake and placed in the bundle by the script. Note: It is named
bundle_info.plist in the Debug and Release folders after configuration so the start of the binary during developement
does not use it.
* When opening the bundle it is assured via setup() in src/app/platform_includes/includesMac.h that the working
directory of the binary is set to .app/Contents/Resources so the paths to the data files are evaluated correctly.

fortune cookie message = Dein Einsatz wird in Kürze belohnt werden.

src/app/CMakeLists.txt

@@ -1,6 +1,10 @@
 add_files(
 	APP_FILES
 
+	platform_includes/includesDefault.h
+	platform_includes/includesMac.h
+	platform_includes/includesWindows.h
+
 	qt/element/QtCodeFile.cpp
 	qt/element/QtCodeFile.h
 	qt/element/QtButton.cpp
@@ -39,6 +43,5 @@ add_files(
 	qt/QtWidgetWrapper.cpp
 	qt/QtWidgetWrapper.h
 
-	includesWindows.h
 	main.cpp
 )

src/app/includes.h.in

@@ -1,7 +0,0 @@
-#ifndef INCLUDES_H
-#define INCLUDES_H
-
-// platform specific includes
-@PLATFORM_INCLUDES@
-
-#endif // INCLUDES_H

src/app/main.cpp

@@ -3,12 +3,14 @@
 #include <QApplication>
 
 #include "Application.h"
-#include "includes.h"
+#include "includes.h" // defines 'void setup()'
 #include "qt/QtGuiFactory.h"
 #include "qt/utility/utilityQt.h"
 
 int main(int argc, char *argv[])
 {
+	setup();
+
 	QApplication qtApp(argc, argv);
 	QtGuiFactory guiFactory;
 

src/app/platform_includes/includes.h.in

@@ -0,0 +1,9 @@
+#ifndef INCLUDES_H
+#define INCLUDES_H
+
+void setup();
+
+// platform specific include
+#include "platform_includes/@PLATFORM_INCLUDE@"
+
+#endif // INCLUDES_H

src/app/platform_includes/includesDefault.h

@@ -0,0 +1,8 @@
+#ifndef INCLUDES_DEFAULT_H
+#define INCLUDES_DEFAULT_H
+
+void setup()
+{
+}
+
+#endif // INCLUDES_DEFAULT_H

src/app/platform_includes/includesMac.h

@@ -0,0 +1,34 @@
+#ifndef INCLUDES_MAC_H
+#define INCLUDES_MAC_H
+
+#include <CoreFoundation/CoreFoundation.h>
+
+void setup()
+{
+	// ----------------------------------------------------------------------------
+	// This makes relative paths work in C++ in Xcode by changing directory to the Resources folder inside the .app bundle
+	// source: http://stackoverflow.com/questions/516200/relative-paths-not-working-in-xcode-c
+	CFBundleRef mainBundle = CFBundleGetMainBundle();
+	if (!mainBundle)
+	{
+		return;
+	}
+
+	CFStringRef bundleIdentifier = CFBundleGetIdentifier(mainBundle);
+	// std::cout << CFStringGetCStringPtr(id, kCFStringEncodingASCII) << std::endl;
+	if (!bundleIdentifier)
+	{
+		return;
+	}
+
+	CFURLRef resourcesURL = CFBundleCopyResourcesDirectoryURL(mainBundle);
+	char path[PATH_MAX];
+	if (CFURLGetFileSystemRepresentation(resourcesURL, TRUE, (UInt8 *)path, PATH_MAX))
+	{
+		chdir(path);
+	}
+	CFRelease(resourcesURL);
+	// ----------------------------------------------------------------------------
+}
+
+#endif // INCLUDES_MAC_H

src/app/platform_includes/includesWindows.h

@@ -3,4 +3,8 @@
 
 #include "vld.h"
 
+void setup()
+{
+}
+
 #endif // INCLUDES_WINDOWS_H