Subversion Repositories aysalia

program AyDos;

// Aysalia DOS Launcher

// Revision 2018-12-08

// (C) 2018 Daniel Marschall, ViaThinkSoft

// This launcher does launch DOSBox with the correct *.conf file,

// centers the window and changes the window title and icon at runtime.

uses

  SysUtils,

  ShellAPI,

  Windows,

  Messages;

{$R *.RES}

const

  DOSBOX_EXE = 'DOSBox.exe';

  AYDOS_MNU = 'AyDos.mnu';

  AYDOS_COM = 'AyDos.com';

var

  hPsApiDll: Cardinal = 0;

  hIcon: THandle = 0;

  bCeneredOnce: boolean = false;

(*

function GetModuleFileNameEx(inProcess: THandle; inModule: THandle;

      Filename: PChar; size: DWord): DWord; stdcall;

      external 'psapi.dll' name 'GetModuleFileNameExA';

*)

{$IFDEF UNICODE}

function GetModuleFileNameEx(inProcess: THandle; inModule: THandle; Filename: PWideChar; size: DWord): Integer;

type

  TGetModuleFileNameExFunc = function (inProcess: THandle; inModule: THandle; Filename: PWideChar; size: DWord): DWord; stdcall;

var

  funcGetModuleFileNameEx: TGetModuleFileNameExFunc;

begin

  if hPsApiDll <> 0 then

  begin

    @funcGetModuleFileNameEx := GetProcAddress(hPsApiDll, 'GetModuleFileNameExW');

    if Assigned(funcGetModuleFileNameEx) then

      result := funcGetModuleFileNameEx(inProcess, inModule, Filename, size)

    else

      result := -1;

  end

  else result := -2;

end;

{$ELSE}

function GetModuleFileNameEx(inProcess: THandle; inModule: THandle; Filename: PAnsiChar; size: DWord): Integer;

type

  TGetModuleFileNameExFunc = function (inProcess: THandle; inModule: THandle; Filename: PAnsiChar; size: DWord): DWord; stdcall;

var

  funcGetModuleFileNameEx: TGetModuleFileNameExFunc;

begin

  if hPsApiDll <> 0 then

  begin

    @funcGetModuleFileNameEx := GetProcAddress(hPsApiDll, 'GetModuleFileNameExA');

    if Assigned(funcGetModuleFileNameEx) then

      result := funcGetModuleFileNameEx(inProcess, inModule, Filename, size)

    else

      result := -1;

  end

  else result := -2;

end;

{$ENDIF}

procedure ChangeTitleAndIcon(hWnd: Thandle);

var

  Title: array[0..255] of Char;

const

  TargetWinWidth = 640;

  TargetWinHeight = 480;

resourcestring

  AyDosTitle = 'Aysalia DOS';

  AyDos1Title = 'Aysalia DOS 1';

  AyDos2Title = 'Aysalia DOS 2';

begin

  ZeroMemory(@Title, sizeof(Title));

  GetWindowText(hWnd, @Title, sizeof(Title)-1);

  // Center window (once)

  if (Title = 'DOSBox') and not bCeneredOnce then

  begin

    MoveWindow(hWnd, GetSystemMetrics(SM_CXSCREEN) div 2 - TargetWinWidth div 2,

                     GetSystemMetrics(SM_CYSCREEN) div 2 - TargetWinHeight div 2,

                     TargetWinWidth,

                     TargetWinHeight,

                     true);

    bCeneredOnce := true;

  end;

  // Change window title

  if Pos('AYDOS1', Title) > 0 then

    SetWindowText(hWnd, PChar(AyDos1Title))

  else if Pos('AYDOS2', Title) > 0 then

    SetWindowText(hWnd, PChar(AyDos2Title))

  else if Pos('AYDOS', Title) > 0 then

    SetWindowText(hWnd, PChar(AyDosTitle));

  // Change window and taskbar icon

  if hIcon > 0 then

  begin

    // Change both icons to the same icon handle.

    SendMessage(hWnd, WM_SETICON, ICON_SMALL, hIcon);

    SendMessage(hWnd, WM_SETICON, ICON_BIG, hIcon);

    // This will ensure that the application icon gets changed too.

    SendMessage(GetWindow(hWnd, GW_OWNER), WM_SETICON, ICON_SMALL, hIcon);

    SendMessage(GetWindow(hWnd, GW_OWNER), WM_SETICON, ICON_BIG, hIcon);

  end;

end;

function EnumWindowsProc(Handle: hWnd; dummy: DWORD): BOOL; stdcall;

var

  Title: array[0..255] of Char;

  WinFileName: array[0..MAX_PATH] of Char;

var

  PID: DWORD;

  hProcess: THandle;

  Len: Integer;

begin

  Result := True;

  ZeroMemory(@WinFileName, sizeof(WinFileName));

  GetWindowThreadProcessId(Handle, @PID);

  hProcess := OpenProcess(PROCESS_ALL_ACCESS, False, PID);

  Len := GetModuleFileNameEx(hProcess, 0, WinFileName, sizeof(WinFileName)-1);

  if Len > 0 then

  begin

    // GetModuleFileNameEx is available on newer operating systems;

    // it ensures that we find the correct window by checking its EXE filename.

    if SameText(WinFileName, ExtractFilePath(ParamStr(0)) + DOSBOX_EXE) then

    begin

      Result := False; // stop enumeration

      ChangeTitleAndIcon(Handle);

    end;

  end

  else if Len < 0 then

  begin

    // At Win9x, there is no psapi.dll, so we try it the old fashioned way,

    // finding the window by parts of its title

    ZeroMemory(@Title, sizeof(Title));

    GetWindowText(Handle, Title, sizeof(Title)-1);

    if IsWindowVisible(Handle) then

    begin

      if (title = 'DOSBox') or ((Pos('DOSBox ',   title) > 0) and

                                (Pos('Cpu speed', title) > 0)) then

      begin

        Result := False; // stop enumeration

        ChangeTitleAndIcon(Handle);

      end;

    end;

  end;

end;

function ShellExecuteWait(hWnd: HWND; Operation, FileName, Parameters,

  Directory: PChar; ShowCmd: Integer; lpEnumFunc: TFNWndEnumProc=nil): DWord;

var

  Info: TShellExecuteInfo;

  pInfo: PShellExecuteInfo;

begin

  pInfo := @Info;

  with Info do

  begin

    cbSize       := SizeOf(Info);

    fMask        := SEE_MASK_NOCLOSEPROCESS;

    wnd          := hWnd;

    lpVerb       := Operation;

    lpFile       := FileName;

    lpParameters := PChar(Parameters + #0);

    lpDirectory  := PChar(Directory);

    nShow        := ShowCmd;

    hInstApp     := 0;

  end;

  ShellExecuteEx(pInfo);

  repeat

    result := WaitForSingleObject(Info.hProcess, 10);

    if Assigned(lpEnumFunc) then EnumWindows(lpEnumFunc, 0);

  until (result <> WAIT_TIMEOUT);

end;

function CanRunDosBox: boolean;

var

  windir: array[0..MAX_PATH] of char;

  osVerInfo: TOSVersionInfo;

begin

  osVerInfo.dwOSVersionInfoSize := SizeOf(TOSVersionInfo);

  if GetVersionEx(osVerInfo) then

  begin

    // DOSBox does not work with Windows 95

    // It works on Windows 98 (but the VC++ Runtime must be installed)

    if osVerInfo.dwPlatformId = VER_PLATFORM_WIN32_WINDOWS then

    begin

      result := (osVerInfo.dwMajorVersion > 4) or

               ((osVerInfo.dwMajorVersion = 4) and (osVerInfo.dwMinorVersion >= 10{Win98}));

    end

    else if osVerInfo.dwPlatformId = VER_PLATFORM_WIN32_NT then

    begin

      result := true;

    end

    else

    begin

      // This should not happen

      result := false;

    end;

  end

  else

  begin

    if GetWindowsDirectory(windir, sizeof(windir)) > 0 then

    begin

      // In case GetVersionEx fails, we are trying to see if command.com exists

      result := FileExists(windir + '\command.com');

    end

    else

    begin

      // This should never happen

      result := false;

    end;

  end;

end;

function Main: Integer;

var

  sFile: string;

begin

  if CanRunDosBox then

  begin

    hPsApiDll := LoadLibrary('psapi.dll');

    try

      hIcon := LoadIcon(hInstance, 'MainIcon');

      bCeneredOnce := false;

      ShellExecuteWait(0, 'open', DOSBOX_EXE, '-noconsole -conf DOSBox.conf',

        PChar(ExtractFilePath(ParamStr(0))), SW_NORMAL, @EnumWindowsProc);

      sFile := IncludeTrailingBackslash(ExtractFilePath(ParamStr(0))) + 'stdout.txt';

      if FileExists(sFile) then DeleteFile(PChar(sFile));

      sFile := IncludeTrailingBackslash(ExtractFilePath(ParamStr(0))) + 'stderr.txt';

      if FileExists(sFile) then DeleteFile(PChar(sFile));

    finally

      FreeLibrary(hPsApiDll);

      hPsApiDll := 0;

    end;

  end

  else

  begin

    // SEE_MASK_CLASSNAME cannot be used with pure MZ files (it does only work for NE/PE files!)

    // So we need to do the dirty rename-hack...

    if FileExists(AYDOS_MNU) and not FileExists(AYDOS_COM) then RenameFile(AYDOS_MNU, AYDOS_COM);

    try

      ShellExecuteWait(0, 'open', PChar(AYDOS_COM), '',

        PChar(ExtractFilePath(ParamStr(0))), SW_NORMAL, nil);

    finally

      if FileExists(AYDOS_COM) and not FileExists(AYDOS_MNU) then RenameFile(AYDOS_COM, AYDOS_MNU);

    end;

  end;

  result := 0;

end;

begin

  ExitCode := Main;

end.