/*
 *Copyright (C) 2003-2004 Harold L Hunt II All Rights Reserved.
 *
 *Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 *"Software"), to deal in the Software without restriction, including
 *without limitation the rights to use, copy, modify, merge, publish,
 *distribute, sublicense, and/or sell copies of the Software, and to
 *permit persons to whom the Software is furnished to do so, subject to
 *the following conditions:
 *
 *The above copyright notice and this permission notice shall be
 *included in all copies or substantial portions of the Software.
 *
 *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
 *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *Except as contained in this notice, the name of Harold L Hunt II
 *shall not be used in advertising or otherwise to promote the sale, use
 *or other dealings in this Software without prior written authorization
 *from Harold L Hunt II.
 *
 * Authors:	Harold L Hunt II
 */

#ifdef HAVE_XWIN_CONFIG_H
#include <xwin-config.h>
#endif
#include "win.h"
#include "winmsg.h"


/*
 * References to external symbols
 */

extern int			g_iNumScreens;
extern winScreenInfo		g_ScreenInfo[];
extern Bool			g_fXdmcpEnabled;


/*
 * Prototypes
 */

Bool
winValidateArgs (void);


/*
 * winValidateArgs - Look for invalid argument combinations
 */

Bool
winValidateArgs (void)
{
  int		i;
  int		iMaxConsecutiveScreen = 0;
  BOOL		fHasNormalScreen0 = FALSE;

  /*
   * Check for a malformed set of -screen parameters.
   * Examples of malformed parameters:
   *	XWin -screen 1
   *	XWin -screen 0 -screen 2
   *	XWin -screen 1 -screen 2
   */
  for (i = 0; i < MAXSCREENS; i++)
    {
      if (g_ScreenInfo[i].fExplicitScreen)
	iMaxConsecutiveScreen = i + 1;
    }
  winErrorFVerb (2, "winValidateArgs - g_iNumScreens: %d "
		 "iMaxConsecutiveScreen: %d\n",
		 g_iNumScreens, iMaxConsecutiveScreen);
  if (g_iNumScreens < iMaxConsecutiveScreen)
    {
      ErrorF ("winValidateArgs - Malformed set of screen parameter(s).  "
	      "Screens must be specified consecutively starting with "
	      "screen 0.  That is, you cannot have only a screen 1, nor "
	      "could you have screen 0 and screen 2.  You instead must "
	      "have screen 0, or screen 0 and screen 1, respectively.  Of "
	      "you can specify as many screens as you want from 0 up to "
	      "%d.\n", MAXSCREENS - 1);
      return FALSE;
    }

  /* Loop through all screens */
  for (i = 0; i < g_iNumScreens; ++i)
    {
      /*
       * Check for any combination of
       * -multiwindow, -mwextwm, and -rootless.
       */
      {
	int		iCount = 0;

	/* Count conflicting options */
#ifdef XWIN_MULTIWINDOW
	if (g_ScreenInfo[i].fMultiWindow)
	  ++iCount;
#endif
#ifdef XWIN_MULTIWINDOWEXTWM
	if (g_ScreenInfo[i].fMWExtWM)
	  ++iCount;
#endif
	if (g_ScreenInfo[i].fRootless)
	  ++iCount;

	/* Check if the first screen is without rootless and multiwindow */ 
	if (iCount == 0 && i == 0)
	  fHasNormalScreen0 = TRUE;  

	/* Fail if two or more conflicting options */
	if (iCount > 1)
	  {
	    ErrorF ("winValidateArgs - Only one of -multiwindow, -mwextwm, "
		    "and -rootless can be specific at a time.\n");
	    return FALSE;
	  }
      }

      /* Check for -multiwindow or -mwextwm and Xdmcp */
      /* allow xdmcp if screen 0 is normal. */
      if (g_fXdmcpEnabled && !fHasNormalScreen0
	  && (FALSE
#ifdef XWIN_MULTIWINDOW
	      || g_ScreenInfo[i].fMultiWindow
#endif
#ifdef XWIN_MULTIWINDOWEXTWM
	      || g_ScreenInfo[i].fMWExtWM
#endif
	      )
	  )
	{
	  ErrorF ("winValidateArgs - Xdmcp (-query, -broadcast, or -indirect) "
		  "is invalid with -multiwindow or -mwextwm.\n");
	  return FALSE;
	}

      /* Check for -multiwindow, -mwextwm, or -rootless and fullscreen */
      if (g_ScreenInfo[i].fFullScreen
	  && (FALSE
#ifdef XWIN_MULTIWINDOW
	      || g_ScreenInfo[i].fMultiWindow
#endif
#ifdef XWIN_MULTIWINDOWEXTWM
	      || g_ScreenInfo[i].fMWExtWM
#endif
	      || g_ScreenInfo[i].fRootless)
	  )
	{
	  ErrorF ("winValidateArgs - -fullscreen is invalid with "
		  "-multiwindow, -mwextwm, or -rootless.\n");
	  return FALSE;
	}
      
      /* Check for !fullscreen and any fullscreen-only parameters */
      if (!g_ScreenInfo[i].fFullScreen
	  && (g_ScreenInfo[i].dwRefreshRate != WIN_DEFAULT_BPP
	      || g_ScreenInfo[i].dwBPP != WIN_DEFAULT_REFRESH))
	{
	  ErrorF ("winValidateArgs - -refresh and -depth are only valid "
		  "with -fullscreen.\n");
	  return FALSE;
	}

      /* Check for fullscreen and any non-fullscreen parameters */
      if (g_ScreenInfo[i].fFullScreen
	  && (g_ScreenInfo[i].fScrollbars
	      || !g_ScreenInfo[i].fDecoration
	      || g_ScreenInfo[i].fLessPointer))
	{
	  ErrorF ("winValidateArgs - -fullscreen is invalid with "
		  "-scrollbars, -nodecoration, or -lesspointer.\n");
	  return FALSE;
	}
    }

  winDebug ("winValidateArgs - Returning.\n");

  return TRUE;
}
