Added code to guess game directory

src/Client/System/GameDirectoryGuesser.cpp

@@ -0,0 +1,61 @@
+#include <Client/System/GameDirectoryGuesser.hpp>
+#include <Shared/Utils/OSDetect.hpp>
+
+#ifdef WOS_WINDOWS
+#	include <windows.h>
+#	include <shlobj.h>
+#elif defined WOS_LINUX
+#	include <pwd.h>
+#	include <unistd.h>
+#	include <cstdlib>
+#endif
+
+std::vector<std::string> GameDirectoryGuesser::getDirectoryList()
+{
+	std::vector<std::string> directories;
+
+#ifdef WOS_WINDOWS
+
+	// TODO: Handle non-ASCII paths better.
+	TCHAR programFilesDirectory[MAX_PATH];
+	TCHAR programFilesX86Directory[MAX_PATH];
+	SHGetFolderPath(nullptr, CSIDL_PROGRAM_FILES, nullptr, 0, programFilesDirectory);
+	SHGetFolderPath(nullptr, CSIDL_PROGRAM_FILESX86, nullptr, 0, programFilesX86Directory);
+
+	std::wstring programFilesW(programFilesDirectory);
+	std::wstring programFilesX86W(programFilesX86Directory);
+
+	std::string programFilesA(programFilesW.begin(), programFilesW.end());
+	std::string programFilesX86A(programFilesX86W.begin(), programFilesX86W.end());
+
+	directories.push_back(programFilesA + "\\Steam\\SteamApps\\common\\Crypt of the NecroDancer");
+	directories.push_back(programFilesX86A + "\\Steam\\SteamApps\\common\\Crypt of the NecroDancer");
+
+#elif defined WOS_LINUX
+
+	// Get user's home directory, if set through $HOME.
+	const char * homeDirectoryPtr = std::getenv("HOME");
+
+	if (homeDirectoryPtr == nullptr)
+	{
+		// Get user's home directory, if not set through $HOME.
+		homeDirectoryPtr = getpwuid(getuid())->pw_dir;
+	}
+
+	if (homeDirectoryPtr != nullptr)
+	{
+		std::string homeDirectory(homeDirectoryPtr);
+
+		// Try all capitalization variants. The exact capitalization depends on when Steam was installed/cleaned.
+		directories.push_back(homeDirectory + "/.local/share/steam/steamapps/common/Crypt of the NecroDancer");
+		directories.push_back(homeDirectory + "/.local/share/Steam/steamapps/common/Crypt of the NecroDancer");
+		directories.push_back(homeDirectory + "/.local/share/steam/SteamApps/common/Crypt of the NecroDancer");
+		directories.push_back(homeDirectory + "/.local/share/Steam/SteamApps/common/Crypt of the NecroDancer");
+	}
+
+#endif
+
+	// TODO: Detect game path for Mac OS X.
+
+	return directories;
+}

src/Client/System/GameDirectoryGuesser.hpp

@@ -0,0 +1,14 @@
+#ifndef SRC_CLIENT_SYSTEM_GAMEDIRECTORYGUESSER_HPP_
+#define SRC_CLIENT_SYSTEM_GAMEDIRECTORYGUESSER_HPP_
+
+#include <string>
+#include <vector>
+
+class GameDirectoryGuesser
+{
+public:
+
+	static std::vector<std::string> getDirectoryList();
+};
+
+#endif

src/Client/System/NEApplication.cpp

@@ -1,4 +1,5 @@
 #include <Client/Graphics/BitmapText.hpp>
+#include <Client/System/GameDirectoryGuesser.hpp>
 #include <Client/System/NEApplication.hpp>
 #include <Client/System/NEInterface.hpp>
 #include <SFML/Graphics/Image.hpp>
@@ -32,15 +33,25 @@ bool NEApplication::chooseGameDirectory()
 		return true;
 	}
 
+	// Check common game directories.
+	for (auto dir : GameDirectoryGuesser::getDirectoryList())
+	{
+		gameDirectory = dir;
+
+		if (checkGameDirectory())
+		{
+			return true;
+		}
+	}
+
 	bool showMessage = false;
 
 	FileChooser fc;
 	fc.setTitle("Select NecroDancer directory");
 
 	MessageBox errorMessage("This is not a valid NecroDancer directory.\n\n"
 		"Please select your NecroDancer installation directory (typically found in "
-		"your SteamApps folder)\nor click \"Cancel\" to exit.", "NecroEdit", MessageBox::Error,
-		MessageBox::OkCancel);
+		"your SteamApps folder)\nor click \"Cancel\" to exit.", "NecroEdit", MessageBox::Error, MessageBox::OkCancel);
 
 	do
 	{
@@ -66,7 +77,8 @@ bool NEApplication::chooseGameDirectory()
 
 		showMessage = true;
 
-	} while (!checkGameDirectory());
+	}
+	while (!checkGameDirectory());
 
 	return true;
 }
@@ -174,7 +186,7 @@ int NEApplication::init(const std::vector<std::string>& args)
 		fontError.show();
 		return LoadErrorFont;
 	}
-	
+
 	setTextureSmoothingEnabled(false);
 
 	open();
@@ -187,9 +199,9 @@ void NEApplication::printUsage(const std::string & exeName)
 	std::cout << "Usage: " << exeName << " [Options] [Dungeon File]" << std::endl;
 	std::cout << "Options:" << std::endl;
 	std::cout << "-g / --game-directory [dir]: Specify [dir] as containing the game's executable and resource files"
-			<< std::endl;
+		<< std::endl;
 	std::cout << "-r / --resource-directory [dir]: Specify [dir] as containing the editor's resource files"
-			<< std::endl;
+		<< std::endl;
 	std::cout << "-h / --help: Show this help" << std::endl;
 	std::cout << "--: Treat following arguments as dungeon file to load, rather than as options" << std::endl;
 }