/* Ch-Drive command for OS/2 operating system
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  
   
   */

#include <config.h>
#ifndef __os2__
#error This file is for the OS/2 operating systems.
#else

#define INCL_DOSDEVICES   /* Device values */
#define INCL_DOSERRORS    /* Error values */
#include <os2.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "tty.h"
#include "mad.h"
#include "util.h"
#include "win.h"
#include "color.h"
#include "dlg.h"
#include "widget.h"
#include "dialog.h"	/* For do_refresh() */

#include "dir.h"
#include "panel.h"		/* Needed for the externs */
#include "file.h"
#include "main.h"
#include "drive.h"

struct Dlg_head *drive_dlg;
WPanel *this_panel;

static int drive_dlg_callback (Dlg_head *h, int Par, int Msg);
static void drive_dlg_refresh (void);
static void drive_cmd();

#define B_DRIVE_BASE 100

void drive_cmd_a(WPanel *p)
{
    this_panel = left_panel;
    /* .ado: Drive change can only be done within view_listing */
    if (p == this_panel) {
       if (get_current_type() != view_listing) {
          return;
       } /* endif */
    } else {
       if (get_other_type() != view_listing) {
          return;
       } /* endif */
    } /* endif */
    drive_cmd();
}


void drive_cmd_b(WPanel *p)
{                                  
    this_panel = right_panel;
    /* .ado: Drive change can only be done within view_listing */
    if (p == this_panel) {
       if (get_current_type() != view_listing) {
          return;
       } /* endif */
    } else {
       if (get_other_type() != view_listing) {
          return;
       } /* endif */
    } /* endif */
    drive_cmd();
}


void drive_chg(WPanel *panel)
{
    this_panel  = panel;
    drive_cmd();
}

#define MAX_LGH      13

static void drive_cmd()			
{
   register int     i;
   register int     j;
   int     nDrivesAvail = 0;            /* Available drives */
   int     nNewDrive;                   /* New drive */
   char    szTempBuf[7];
   ULONG   uDriveNum = 0;               /* Drive number (A=1, B=2 ...) */
   ULONG   uDriveMap = 0;               /* Mapping */
   char    sDrvs[26];                   /* Char-Mapping */
   char    curDisk;

   // Dialogbox position 
   int  x_pos;									/* X-Position for the dialog */
   int  y_pos = (LINES-6)/2-3;                 /* Center on y */
   int  y_height;
   int  x_width;

   int  m_drv;
   void *widget;

   APIRET  rc        = NO_ERROR;        /* Return code */

   memset(sDrvs, (char) 0, 26);
   rc = DosQueryCurrentDisk(&uDriveNum, &uDriveMap);
   
   if (rc != NO_ERROR) {
      message(0, " ERROR ", " Internal Error with drive_cmd ");
      return;
   } /* endif */

   j = 0;
   for (i=0; i < 26; i++) {
      if ( (uDriveMap<<(31-i)) >> 31) {
         sDrvs[j++] = (char) ((int) 'A' + i);
         nDrivesAvail++;
      } /* endif */
   } /* endfor */

   /* Create Dialog */
   do_refresh ();

   m_drv = ((nDrivesAvail > MAX_LGH) ? MAX_LGH: nDrivesAvail);
   x_pos = this_panel->widget.x + (this_panel->widget.cols - m_drv*3)/2 + 2;	/* Center on x, relative to panel */

   if (nDrivesAvail > MAX_LGH) {
        y_height = 8;
        x_width  = 33;
   } else {
        y_height = 6;
	x_width  = (nDrivesAvail - 1) * 2 + 9;
   }

   drive_dlg = create_dlg (y_pos, x_pos,
                           y_height, 
                           x_width, 
                           dialog_colors,
                           drive_dlg_callback, 
                           "[ChDrive]", 
                           "drive", 
                           DLG_NONE);

   x_set_dialog_title (drive_dlg, "Change Drive");

   if (nDrivesAvail>MAX_LGH) {
      for (i = 0; i < nDrivesAvail - MAX_LGH; i++) {
         sprintf(szTempBuf, "%c", sDrvs[nDrivesAvail-i-1]);
         add_widgetl (drive_dlg, 
                      button_new (5, (m_drv-i-1)*2+4 - (MAX_LGH*2 - nDrivesAvail) * 2, 
                              B_DRIVE_BASE+((int) szTempBuf[0] - (int) 'A'), 
                              HIDDEN_BUTTON,
                              szTempBuf,
                              0, NULL, NULL),
                      XV_WLAY_RIGHTOF); 
      }
   }
   /* Add a button for each drive */
   for (i = 0; i < m_drv; i++) {
    	sprintf (szTempBuf, "%c", sDrvs[m_drv-i-1]);
        add_widgetl(drive_dlg, 
                    button_new (3, 
                               (m_drv-i-1)*2+4, 
                               B_DRIVE_BASE+((int)szTempBuf[0] - (int) 'A'), 
                               HIDDEN_BUTTON,
                               szTempBuf,
                               0, 
                               NULL,
                               NULL), 
                   XV_WLAY_RIGHTOF);
    }

   run_dlg(drive_dlg);   

   /* do action */
   if (drive_dlg->ret_value != B_CANCEL) {
	nNewDrive = drive_dlg->ret_value - B_DRIVE_BASE;
        curDisk = (char) (nNewDrive + (int) 'A');
        rc = DosSetDefaultDisk(nNewDrive + 1);
        if (rc != NO_ERROR) {
           message(1, " Error ", " Invalid Drive %c: \n", curDisk);
        } else {
           getcwd(this_panel->cwd, sizeof(this_panel->cwd) - 2);
           // if getcwd returns NULL --> error!
           // rc = DosQueryCurrentDisk(&uDriveNum, &uDriveMap);
           if (toupper(curDisk) == toupper(*(this_panel->cwd)))  {
                clean_dir (&this_panel->dir, this_panel->count);
                this_panel->count = do_load_dir (&this_panel->dir, 
                                                this_panel->sort_type, 
                                                this_panel->reverse, 
                                                this_panel->case_sensitive, 
                                                this_panel->filter);
                this_panel->top_file = 0;
                this_panel->selected = 0;
                this_panel->marked = 0;
                this_panel->total = 0;
                show_dir(this_panel);
                reread_cmd();
           } /* endif */
           // rc = DosSetDefaultDisk(uDriveNum);
       }
   }
   destroy_dlg (drive_dlg);
   repaint_screen ();
}

static int drive_dlg_callback (Dlg_head *h, int Par, int Msg)
{
    char buffer [10];
    
    switch (Msg) {
#ifndef HAVE_X
    case DLG_DRAW:
	drive_dlg_refresh ();
	break;
#endif
    }
    return 0;
}

static void drive_dlg_refresh (void)
{
    attrset (dialog_colors[0]);
    dlg_erase (drive_dlg);
    draw_box (drive_dlg, 1, 1, drive_dlg->lines-2, drive_dlg->cols-2);

    attrset (dialog_colors[2]);
    dlg_move (drive_dlg, 1, drive_dlg->cols/2 - 7);
    addstr (" Change Drive ");
}

#endif