rxvt-unicode/src/command.C

/*--------------------------------*-C-*---------------------------------*
 * File:        command.C
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 1992      John Bovey, University of Kent at Canterbury <jdb@ukc.ac.uk>
 *                              - original version
 * Copyright (c) 1994      Robert Nation <nation@rocket.sanders.lockheed.com>
 *                              - extensive modifications
 * Copyright (c) 1995      Garrett D'Amore <garrett@netcom.com>
 *                              - vt100 printing
 * Copyright (c) 1995      Steven Hirsch <hirsch@emba.uvm.edu>
 *                              - X11 mouse report mode and support for
 *                                DEC "private mode" save/restore functions.
 * Copyright (c) 1995      Jakub Jelinek <jj@gnu.ai.mit.edu>
 *                              - key-related changes to handle Shift+function
 *                                keys properly.
 * Copyright (c) 1997      MJ Olesen <olesen@me.queensu.ca>
 *                              - extensive modifications
 * Copyright (c) 1997      Raul Garcia Garcia <rgg@tid.es>
 *                              - modification and cleanups for Solaris 2.x
 *                                and Linux 1.2.x
 * Copyright (c) 1997,1998 Oezguer Kesim <kesim@math.fu-berlin.de>
 * Copyright (c) 1998-2001 Geoff Wing <gcw@pobox.com>
 *                              - extensive modifications
 * Copyright (c) 1998      Alfredo K. Kojima <kojima@windowmaker.org>
 * Copyright (c) 2001      Marius Gedminas
 *                              - Ctrl/Mod4+Tab works like Meta+Tab (options)
 * Copyright (c) 2003      Rob McMullen <robm@flipturn.org>
 * Copyright (c) 2003-2004 Marc Lehmann <pcg@goof.com>
 *
 * 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.
 *----------------------------------------------------------------------*/

/*{{{ includes: */
#include "../config.h"          /* NECESSARY */
#include "rxvt.h"               /* NECESSARY */
#include "version.h"
#include "command.h"

#include <wchar.h>

/*----------------------------------------------------------------------*/

#define IS_CONTROL(ch) !((ch) & 0xffffff60UL)

// exception thrown when the command parser runs out of input data
class out_of_input { } out_of_input;

#ifndef NO_FRILLS

#define ISO_14755_KEYCODE_VALID 0x80000000UL
#define ISO_14755_ACTIVE        0x40000000UL
#define ISO_14755_ESCAPE_NEXT   0x20000000UL

static unsigned short iso14755_symtab[] = {
  // keysym,            unicode
  XK_Left,              0x2190,
  XK_KP_Left,           0x2190,
  XK_Up,                0x2191,
  XK_KP_Up,             0x2191,
  XK_Right,             0x2192,
  XK_KP_Right,          0x2192,
  XK_Down,              0x2193,
  XK_KP_Down,           0x2193,
  XK_Linefeed,          0x21b4,
  XK_Return,            0x21b5,
  XK_KP_Enter,          0x21b5,

  XK_Prior,             0x21de,
  XK_Next,              0x21df,
  XK_Tab,               0x21e5,
  XK_ISO_Left_Tab,      0x21e6,
  XK_Shift_L,           0x21e7,
  XK_Shift_R,           0x21e7,

  XK_Shift_Lock,        0x21eb,
  XK_ISO_Lock,          0x21eb,
  XK_ISO_Lock,          0x21eb,
  XK_Caps_Lock,         0x21ec,
  XK_Num_Lock,          0x21ed,
  XK_ISO_Level3_Shift,  0x21ee,
  XK_ISO_Level3_Lock,   0x21ef,
  XK_ISO_Group_Lock,    0x21f0,
  XK_Home,              0x21f1,
  XK_End,               0x21f2,

  XK_Execute,           0x2318,
  XK_Begin,             0x2320,
  XK_Delete,            0x2326,
  XK_Clear,             0x2327,
  XK_BackSpace,         0x232b,
  XK_Insert,            0x2380,
  XK_Control_L,         0x2388,
  XK_Control_R,         0x2388,
  XK_Pause,             0x2389,
  XK_Break,             0x238a,
  XK_Escape,            0x238b,
  XK_Undo,              0x238c,
  XK_Print,             0x2399,

  XK_space,             0x2423,
  XK_KP_Space,          0x2422,
  0,
};

void
rxvt_term::commit_iso14755 ()
{
  wchar_t ch[2];

  ch[0] = iso14755buf & 0x1fffffffUL; // actually, unicode needs a 0x1fffff mask
  ch[1] = 0;

  if (iso14755buf & ISO_14755_KEYCODE_VALID)
    {
      char mb[16];
      int len;

      // allow verbatim 0-bytes and control-bytes to be entered
      if (ch[0] >= 0x20)
        len = wcstombs (mb, ch, 16);
      else
        {
          mb[0] = ch[0];
          len = 1;
        }

      if (len > 0)
        tt_write ((unsigned char *)mb, len);
      else
        scr_bell ();
    }

  iso14755buf = 0;
}

int
rxvt_term::hex_keyval (XKeyEvent &ev)
{
  // check wether this event corresponds to a hex digit
  // if the modifiers had not been pressed.
  for (int index = 0; index < 8; index++)
    {
      KeySym k = XLookupKeysym (&ev, index);

      if (k >= XK_KP_0 && k <= XK_KP_9) return k - XK_KP_0;
      else if (k >= XK_0 && k <= XK_9)  return k - XK_0;
      else if (k >= XK_a && k <= XK_f)  return k - XK_a + 10;
      else if (k >= XK_A && k <= XK_F)  return k - XK_A + 10;
    }

  return -1;
}
#endif

/*{{{ Convert the keypress event into a string */
void
rxvt_term::lookup_key (XKeyEvent &ev)
{
  int ctrl, meta, shft, len;
  unsigned int newlen;
  KeySym keysym;
#ifdef DEBUG_CMD
  static int debug_key = 1;     /* accessible by a debugger only */
#endif
  int valid_keysym;
  unsigned char kbuf[KBUFSZ];

  /*
   * use Num_Lock to toggle Keypad on/off.  If Num_Lock is off, allow an
   * escape sequence to toggle the Keypad.
   *
   * Always permit `shift' to override the current setting
   */
  shft = (ev.state & ShiftMask);
  ctrl = (ev.state & ControlMask);
  meta = (ev.state & ModMetaMask);

  if (numlock_state || (ev.state & ModNumLockMask))
    {
      numlock_state = (ev.state & ModNumLockMask);
      PrivMode ((!numlock_state), PrivMode_aplKP);
    }

  kbuf[0] = 0;

#ifdef USE_XIM
  if (Input_Context)
    {
      Status status_return;

#if 0
#ifdef X_HAVE_UTF8_STRING
      if (enc_utf8 && 0) // currently disabled, doesn't seem to work, nor is useful
        len = Xutf8LookupString (Input_Context, &ev, (char *)kbuf,
                                 KBUFSZ, &keysym, &status_return);
      else
#endif
#endif
        {
          wchar_t wkbuf[KBUFSZ + 1];

          // the XOpenIM manpage lies about hardcoding the locale
          // at the point of XOpenIM, so temporarily switch locales
          if (rs[Rs_imLocale])
            SET_LOCALE (rs[Rs_imLocale]);
          // assume wchar_t == unicode or better
          len = XwcLookupString (Input_Context, &ev, wkbuf,
                                 KBUFSZ, &keysym, &status_return);
          if (rs[Rs_imLocale])
            SET_LOCALE (locale);

          if (status_return == XLookupChars
              || status_return == XLookupBoth)
            {
              /* make sure the user can type ctrl-@, i.e. NUL */
              if (len == 1 && *wkbuf == 0)
                {
                  kbuf[0] = 0;
                  len = 1;
                }
              else
                {
                  wkbuf[len] = 0;
                  len = wcstombs ((char *)kbuf, wkbuf, KBUFSZ);
                  if (len < 0)
                    len = 0;
                }
            }
          else
            len = 0;
        }

      valid_keysym = status_return == XLookupKeySym
                     || status_return == XLookupBoth;
    }
  else
#endif
    {
      len = XLookupString (&ev, (char *)kbuf, KBUFSZ, &keysym, &compose);
      valid_keysym = keysym != NoSymbol;
    }

  if (valid_keysym)
    {
      if (TermWin.saveLines)
        {
#ifdef UNSHIFTED_SCROLLKEYS
          if (!ctrl && !meta)
#else
          if (IS_SCROLL_MOD)
#endif
            {
              int lnsppg;

#ifdef PAGING_CONTEXT_LINES
              lnsppg = TermWin.nrow - PAGING_CONTEXT_LINES;
#else
              lnsppg = TermWin.nrow * 4 / 5;
#endif
              if (keysym == XK_Prior)
                {
                  scr_page (UP, lnsppg);
                  return;
                }
              else if (keysym == XK_Next)
                {
                  scr_page (DN, lnsppg);
                  return;
                }
            }
#ifdef SCROLL_ON_UPDOWN_KEYS
          if (IS_SCROLL_MOD)
            {
              if (keysym == XK_Up)
                {
                  scr_page (UP, 1);
                  return;
                }
              else if (keysym == XK_Down)
                {
                  scr_page (DN, 1);
                  return;
                }
            }
#endif
#ifdef SCROLL_ON_HOMEEND_KEYS
          if (IS_SCROLL_MOD)
            {
              if (keysym == XK_Home)
                {
                  scr_move_to (0, 1);
                  return;
                }
              else if (keysym == XK_End)
                {
                  scr_move_to (1, 0);
                  return;
                }
            }
#endif
        }

      if (shft)
        {
          /* Shift + F1 - F10 generates F11 - F20 */
          if (keysym >= XK_F1 && keysym <= XK_F10)
            {
              keysym += (XK_F11 - XK_F1);
              shft = 0; /* turn off Shift */
            }
          else if (!ctrl && !meta && (PrivateModes & PrivMode_ShiftKeys))
            {
              switch (keysym)
                {
                    /* normal XTerm key bindings */
                  case XK_Insert:       /* Shift+Insert = paste mouse selection */
                    selection_request (ev.time, 0, 0);
                    return;
#if TODO // TODO
                    /* rxvt extras */
                  case XK_KP_Add:       /* Shift+KP_Add = bigger font */
                    change_font (FONT_UP);
                    return;
                  case XK_KP_Subtract:  /* Shift+KP_Subtract = smaller font */
                    change_font (FONT_DN);
                    return;
#endif
                }
            }
        }

#ifndef NO_FRILLS
      // ISO 14755 support
      if (shft && ctrl)
        {
          int hv;

          if (keysym == XK_space || keysym == XK_KP_Space
              || keysym == XK_Return || keysym == XK_KP_Enter)
            {
              commit_iso14755 ();
              return;
            }
          else if ((hv = hex_keyval (ev)) >= 0)
            {
              iso14755buf = (iso14755buf << 4) | hv | ISO_14755_KEYCODE_VALID;
              return;
            }
          else
            iso14755buf = 0;
        }
      else if ((ctrl && (keysym == XK_Shift_L || keysym == XK_Shift_R))
               || (shft && (keysym == XK_Control_L || keysym == XK_Control_R)))
        iso14755buf |= ISO_14755_ACTIVE;
#endif
      
#ifdef PRINTPIPE
      if (keysym == XK_Print)
        {
          scr_printscreen (ctrl | shft);
          return;
        }
#endif

      if (keysym >= 0xFF00 && keysym <= 0xFFFF)
        {
#ifdef KEYSYM_RESOURCE
          if (! (shft | ctrl) && Keysym_map[keysym & 0xFF] != NULL)
            {
              unsigned int    l;
              const unsigned char *kbuf0;

              kbuf0 = (Keysym_map[keysym & 0xFF]);
              l = (unsigned int)*kbuf0++;

              /* escape prefix */
              if (meta
# ifdef META8_OPTION
                  && meta_char == C0_ESC
# endif
                 )
                {
                  const unsigned char ch = C0_ESC;
                  tt_write (&ch, 1);
                }

              tt_write (kbuf0, l);
              return;
            }
          else
#endif
            {
              newlen = 1;
              switch (keysym)
                {
#ifndef NO_BACKSPACE_KEY
                  case XK_BackSpace:
                    if (PrivateModes & PrivMode_HaveBackSpace)
                      {
                        kbuf[0] = (!! (PrivateModes & PrivMode_BackSpace)
                                   ^ !!ctrl) ? '\b' : '\177';
                        kbuf[1] = '\0';
                      }
                    else
                      STRCPY (kbuf, key_backspace);
                    break;
#endif
#ifndef NO_DELETE_KEY
                  case XK_Delete:
                    STRCPY (kbuf, key_delete);
                    break;
#endif
                  case XK_Tab:
                    if (shft)
                      STRCPY (kbuf, "\033[Z");
                    else
                      {
#ifdef CTRL_TAB_MAKES_META
                        if (ctrl)
                          meta = 1;
#endif
#ifdef MOD4_TAB_MAKES_META
                        if (ev.state & Mod4Mask)
                          meta = 1;
#endif
                        newlen = 0;
                      }
                    break;

#ifdef XK_KP_Left
                  case XK_KP_Up:        /* \033Ox or standard */
                  case XK_KP_Down:      /* \033Or or standard */
                  case XK_KP_Right:     /* \033Ov or standard */
                  case XK_KP_Left:      /* \033Ot or standard */
                    if ((PrivateModes & PrivMode_aplKP) ? !shft : shft)
                      {
                        STRCPY (kbuf, "\033OZ");
                        kbuf[2] = "txvr"[keysym - XK_KP_Left];
                        break;
                      }
                    else
                      /* translate to std. cursor key */
                      keysym = XK_Left + (keysym - XK_KP_Left);
                    /* FALLTHROUGH */
#endif
                  case XK_Up:   /* "\033[A" */
                  case XK_Down: /* "\033[B" */
                  case XK_Right:        /* "\033[C" */
                  case XK_Left: /* "\033[D" */
                    STRCPY (kbuf, "\033[Z");
                    kbuf[2] = "DACB"[keysym - XK_Left];
                    /* do Shift first */
                    if (shft)
                      kbuf[2] = "dacb"[keysym - XK_Left];
                    else if (ctrl)
                      {
                        kbuf[1] = 'O';
                        kbuf[2] = "dacb"[keysym - XK_Left];
                      }
                    else if (PrivateModes & PrivMode_aplCUR)
                      kbuf[1] = 'O';
                    break;

#ifndef UNSHIFTED_SCROLLKEYS
# ifdef XK_KP_Prior
                  case XK_KP_Prior:
                    /* allow shift to override */
                    if ((PrivateModes & PrivMode_aplKP) ? !shft : shft)
                      {
                        STRCPY (kbuf, "\033Oy");
                        break;
                      }
                    /* FALLTHROUGH */
# endif
                  case XK_Prior:
                    STRCPY (kbuf, "\033[5~");
                    break;
# ifdef XK_KP_Next
                  case XK_KP_Next:
                    /* allow shift to override */
                    if ((PrivateModes & PrivMode_aplKP) ? !shft : shft)
                      {
                        STRCPY (kbuf, "\033Os");
                        break;
                      }
                    /* FALLTHROUGH */
# endif
                  case XK_Next:
                    STRCPY (kbuf, "\033[6~");
                    break;
#endif
                  case XK_KP_Enter:
                    /* allow shift to override */
                    if ((PrivateModes & PrivMode_aplKP) ? !shft : shft)
                      {
                        STRCPY (kbuf, "\033OM");
                      }
                    else
                      {
                        kbuf[0] = '\r';
                        kbuf[1] = '\0';
                      }
                    break;

#ifdef XK_KP_Begin
                  case XK_KP_Begin:
                    STRCPY (kbuf, "\033Ou");
                    break;

                  case XK_KP_Insert:
                    STRCPY (kbuf, "\033Op");
                    break;

                  case XK_KP_Delete:
                    STRCPY (kbuf, "\033On");
                    break;
#endif
                  case XK_KP_F1:        /* "\033OP" */
                  case XK_KP_F2:        /* "\033OQ" */
                  case XK_KP_F3:        /* "\033OR" */
                  case XK_KP_F4:        /* "\033OS" */
                    STRCPY (kbuf, "\033OP");
                    kbuf[2] += (keysym - XK_KP_F1);
                    break;

                  case XK_KP_Multiply:  /* "\033Oj" : "*" */
                  case XK_KP_Add:       /* "\033Ok" : "+" */
                  case XK_KP_Separator: /* "\033Ol" : "," */
                  case XK_KP_Subtract:  /* "\033Om" : "-" */
                  case XK_KP_Decimal:   /* "\033On" : "." */
                  case XK_KP_Divide:    /* "\033Oo" : "/" */
                  case XK_KP_0:         /* "\033Op" : "0" */
                  case XK_KP_1:         /* "\033Oq" : "1" */
                  case XK_KP_2:         /* "\033Or" : "2" */
                  case XK_KP_3:         /* "\033Os" : "3" */
                  case XK_KP_4:         /* "\033Ot" : "4" */
                  case XK_KP_5:         /* "\033Ou" : "5" */
                  case XK_KP_6:         /* "\033Ov" : "6" */
                  case XK_KP_7:         /* "\033Ow" : "7" */
                  case XK_KP_8:         /* "\033Ox" : "8" */
                  case XK_KP_9:         /* "\033Oy" : "9" */
                    /* allow shift to override */
                    if ((PrivateModes & PrivMode_aplKP) ? !shft : shft)
                      {
                        STRCPY (kbuf, "\033Oj");
                        kbuf[2] += (keysym - XK_KP_Multiply);
                      }
                    else
                      {
                        kbuf[0] = ('*' + (keysym - XK_KP_Multiply));
                        kbuf[1] = '\0';
                      }
                    break;

                  case XK_Find:
                    STRCPY (kbuf, "\033[1~");
                    break;
                  case XK_Insert:
                    STRCPY (kbuf, "\033[2~");
                    break;
#ifdef DXK_Remove               /* support for DEC remove like key */
                  case DXK_Remove:
                    /* FALLTHROUGH */
#endif
                  case XK_Execute:
                    STRCPY (kbuf, "\033[3~");
                    break;
                  case XK_Select:
                    STRCPY (kbuf, "\033[4~");
                    break;
#ifdef XK_KP_End
                  case XK_KP_End:
                    /* allow shift to override */
                    if ((PrivateModes & PrivMode_aplKP) ? !shft : shft)
                      {
                        STRCPY (kbuf, "\033Oq");
                        break;
                      }
                    /* FALLTHROUGH */
#endif
                  case XK_End:
                    STRCPY (kbuf, KS_END);
                    break;
#ifdef XK_KP_Home
                  case XK_KP_Home:
                    /* allow shift to override */
                    if ((PrivateModes & PrivMode_aplKP) ? !shft : shft)
                      {
                        STRCPY (kbuf, "\033Ow");
                        break;
                      }
                    /* FALLTHROUGH */
#endif
                  case XK_Home:
                    STRCPY (kbuf, KS_HOME);
                    break;

#define FKEY(n, fkey)                                                   \
    sprintf ((char *)kbuf,"\033[%2d~", (int) ((n) + (keysym - fkey)))

                  case XK_F1:   /* "\033[11~" */
                  case XK_F2:   /* "\033[12~" */
                  case XK_F3:   /* "\033[13~" */
                  case XK_F4:   /* "\033[14~" */
                  case XK_F5:   /* "\033[15~" */
                    FKEY (11, XK_F1);
                    break;
                  case XK_F6:   /* "\033[17~" */
                  case XK_F7:   /* "\033[18~" */
                  case XK_F8:   /* "\033[19~" */
                  case XK_F9:   /* "\033[20~" */
                  case XK_F10:  /* "\033[21~" */
                    FKEY (17, XK_F6);
                    break;
                  case XK_F11:  /* "\033[23~" */
                  case XK_F12:  /* "\033[24~" */
                  case XK_F13:  /* "\033[25~" */
                  case XK_F14:  /* "\033[26~" */
                    FKEY (23, XK_F11);
                    break;
                  case XK_F15:  /* "\033[28~" */
                  case XK_F16:  /* "\033[29~" */
                    FKEY (28, XK_F15);
                    break;
                  case XK_Help: /* "\033[28~" */
                    FKEY (28, XK_Help);
                    break;
                  case XK_Menu: /* "\033[29~" */
                    FKEY (29, XK_Menu);
                    break;
                  case XK_F17:  /* "\033[31~" */
                  case XK_F18:  /* "\033[32~" */
                  case XK_F19:  /* "\033[33~" */
                  case XK_F20:  /* "\033[34~" */
                  case XK_F21:  /* "\033[35~" */
                  case XK_F22:  /* "\033[36~" */
                  case XK_F23:  /* "\033[37~" */
                  case XK_F24:  /* "\033[38~" */
                  case XK_F25:  /* "\033[39~" */
                  case XK_F26:  /* "\033[40~" */
                  case XK_F27:  /* "\033[41~" */
                  case XK_F28:  /* "\033[42~" */
                  case XK_F29:  /* "\033[43~" */
                  case XK_F30:  /* "\033[44~" */
                  case XK_F31:  /* "\033[45~" */
                  case XK_F32:  /* "\033[46~" */
                  case XK_F33:  /* "\033[47~" */
                  case XK_F34:  /* "\033[48~" */
                  case XK_F35:  /* "\033[49~" */
                    FKEY (31, XK_F17);
                    break;
#undef FKEY
                  default:
                    newlen = 0;
                    break;
                }
              if (newlen)
                len = STRLEN (kbuf);
            }

          /*
           * Pass meta for all function keys, if 'meta' option set
           */
#ifdef META8_OPTION
          if (meta && (meta_char == 0x80) && len > 0)
            kbuf[len - 1] |= 0x80;
#endif

        }
      else if (ctrl && keysym == XK_minus)
        {
          len = 1;
          kbuf[0] = '\037';     /* Ctrl-Minus generates ^_ (31) */
        }
      else
        {
#ifdef META8_OPTION
          /* set 8-bit on */
          if (meta && (meta_char == 0x80))
            {
              unsigned char  *ch;

              for (ch = kbuf; ch < kbuf + len; ch++)
                *ch |= 0x80;

              meta = 0;
            }
#endif
          /* nil */ ;
        }
    }

  if (len <= 0)
    return;                     /* not mapped */

  if (Options & Opt_scrollTtyKeypress)
    if (TermWin.view_start)
      {
        TermWin.view_start = 0;
        want_refresh = 1;
      }

  /*
   * these modifications only affect the static keybuffer
   * pass Shift/Control indicators for function keys ending with `~'
   *
   * eg,
   *   Prior = "ESC[5~"
   *   Shift+Prior = "ESC[5$"
   *   Ctrl+Prior = "ESC[5^"
   *   Ctrl+Shift+Prior = "ESC[5@"
   * Meta adds an Escape prefix (with META8_OPTION, if meta == <escape>).
   */
  if (kbuf[0] == C0_ESC && kbuf[1] == '[' && kbuf[len - 1] == '~')
    kbuf[len - 1] = (shft ? (ctrl ? '@' : '$') : (ctrl ? '^' : '~'));

  /* escape prefix */
  if (meta
#ifdef META8_OPTION
      && meta_char == C0_ESC
#endif
     )
    {
      const unsigned char ch = C0_ESC;
      tt_write (&ch, 1);
    }

#if defined(DEBUG_CMD)
  /* Display keyboard buffer contents */
  unsigned char *p;
  int i;

  fprintf (stderr, "key 0x%04X [%d]: `", (unsigned int)keysym, len);
  for (i = 0, p = kbuf; i < len; i++, p++)
    fprintf (stderr, (*p >= ' ' && *p < '\177' ? "%c" : "\\%03o"), *p);
  fprintf (stderr, "'\n");
#endif                          /* DEBUG_CMD */
  tt_write (kbuf, (unsigned int)len);
}
/*}}} */

#if (MENUBAR_MAX)
/*{{{ rxvt_cmd_write (), rxvt_cmd_getc () */
/* attempt to `write' count to the input buffer */
unsigned int
rxvt_term::cmd_write (const unsigned char *str, unsigned int count)
{
  unsigned int n, s;

  n = cmdbuf_ptr - cmdbuf_base;
  s = cmdbuf_base + CBUFSIZ - 1 - cmdbuf_endp;

  if (n > 0 && s < count)
    {
      MEMMOVE (cmdbuf_base, cmdbuf_ptr,
              (unsigned int) (cmdbuf_endp - cmdbuf_ptr));
      cmdbuf_ptr = cmdbuf_base;
      cmdbuf_endp -= n;
      s += n;
    }

  if (count > s)
    {
      rxvt_warn ("data loss: cmd_write too large, continuing.\n");
      count = s;
    }

  for (; count--;)
    *cmdbuf_endp++ = *str++;

  cmd_parse ();

  return 0;
}
#endif                          /* MENUBAR_MAX */

void
rxvt_term::flush ()
{
#ifdef TRANSPARENT
  if (want_full_refresh)
    {
      want_full_refresh = 0;
      scr_clear ();
      scr_touch (false);
    }
#endif

  if (want_refresh)
    {
      scr_refresh (refresh_type);
      scrollbar_show (1);
#ifdef USE_XIM
      IMSendSpot ();
#endif
    }

  display->flush ();

  flush_ev.stop ();
}

void
rxvt_term::check_cb (check_watcher &w)
{
  SET_R (this);
  SET_LOCALE (locale);

  display->flush ();

  if (want_refresh && !flush_ev.active)
    flush_ev.start (NOW + 0.01);
}

void
rxvt_term::flush_cb (time_watcher &w)
{
  SET_R (this);
  SET_LOCALE (locale);

  refresh_limit = 1;
  refresh_count = 0;
  flush ();
}

#ifdef CURSOR_BLINK
void
rxvt_term::cursor_blink_cb (time_watcher &w)
{
  hidden_cursor = !hidden_cursor;
  want_refresh = 1;

  w.start (w.at + BLINK_INTERVAL);
}
#endif

#ifdef TEXT_BLINK
void
rxvt_term::text_blink_cb (time_watcher &w)
{
  if (scr_refresh_rend (RS_Blink, RS_Blink))
    {
      hidden_text = !hidden_text;
      want_refresh = 1;
      w.start (w.at + TEXT_BLINK_INTERVAL);
    }
}
#endif

#ifndef NO_SCROLLBAR_BUTTON_CONTINUAL_SCROLLING
void
rxvt_term::cont_scroll_cb (time_watcher &w)
{
  if ((scrollbar_isUp() || scrollbar_isDn()) &&
      scr_page (scrollbar_isUp() ? UP : DN, 1))
    {
      refresh_type |= SMOOTH_REFRESH;
      want_refresh = 1;
      w.start (w.at + SCROLLBAR_CONTINUOUS_DELAY);
    }
}
#endif

#ifdef SELECTION_SCROLLING
void
rxvt_term::sel_scroll_cb (time_watcher &w)
{
  if (scr_page (scroll_selection_dir, scroll_selection_lines))
    {
      selection_extend (selection_save_x, selection_save_y, selection_save_state);
      refresh_type |= SMOOTH_REFRESH;
      want_refresh = 1;
      w.start (w.at + SCROLLBAR_CONTINUOUS_DELAY);
    }
}
#endif

#if defined(MOUSE_WHEEL) && defined(MOUSE_SLIP_WHEELING)
void
rxvt_term::slip_wheel_cb (time_watcher &w)
{
  if (mouse_slip_wheel_speed == 0
      || mouse_slip_wheel_speed < 0 ? scr_page (DN, -mouse_slip_wheel_speed)
                                    : scr_page (UP,  mouse_slip_wheel_speed))
    {
      refresh_type |= SMOOTH_REFRESH;
      want_refresh = 1;
      w.start (w.at + SCROLLBAR_CONTINUOUS_DELAY);
    }
}
#endif

bool
rxvt_term::pty_fill ()
{
  ssize_t n = cmdbuf_endp - cmdbuf_ptr;

  if (CBUFSIZ == n)
    {
      rxvt_warn ("pty_fill on full buffer, draining input, continuing.\n");
      n = 0;
    }

  memmove (cmdbuf_base, cmdbuf_ptr, n);
  cmdbuf_ptr = cmdbuf_base;
  cmdbuf_endp = cmdbuf_ptr + n;

  n = read (cmd_fd, cmdbuf_endp, CBUFSIZ - n);

  if (n > 0)
    {
      cmdbuf_endp += n;
      return true;
    }
  else if (n < 0 && errno != EAGAIN)
    destroy ();
  
  return false;
}

void
rxvt_term::pty_cb (io_watcher &w, short revents)
{
  SET_R (this);
  SET_LOCALE (locale);

  if (revents & EVENT_WRITE)
    tt_write (0, 0);
  else if (revents & EVENT_READ)
    // loop, but don't allow a single term to monopolize us
    while (pty_fill ())
      if (cmd_parse ())
        break;
}

void
rxvt_term::pointer_unblank ()
{
  XDefineCursor (display->display, TermWin.vt, TermWin_cursor);
  recolour_cursor ();

#ifdef POINTER_BLANK
  hidden_pointer = 0;

  if (Options & Opt_pointerBlank)
    pointer_ev.start (NOW + pointerBlankDelay);
#endif
}

#ifdef POINTER_BLANK
void
rxvt_term::pointer_blank ()
{
  if (! (Options & Opt_pointerBlank))
    return;

  XDefineCursor (display->display, TermWin.vt, blank_cursor);
  XFlush (display->display);

  hidden_pointer = 1;
}

void
rxvt_term::pointer_cb (time_watcher &w)
{
  SET_R (this);
  SET_LOCALE (locale);

  pointer_blank ();
}
#endif

void
rxvt_term::mouse_report (XButtonEvent &ev)
{
  int button_number, key_state = 0;
  int x, y;

  x = ev.x;
  y = ev.y;
  pixel_position (&x, &y);

  if (MEvent.button == AnyButton)
    {
      button_number = 3;
    }
  else
    {
      button_number = MEvent.button - Button1;
      /* add 0x3D for wheel events, like xterm does */
      if (button_number >= 3)
        button_number += (64 - 3);
    }

  if (PrivateModes & PrivMode_MouseX10)
    {
      /*
       * do not report ButtonRelease
       * no state info allowed
       */
      key_state = 0;
      if (button_number == 3)
        return;
    }
  else
    {
      /* XTerm mouse reporting needs these values:
       *   4 = Shift
       *   8 = Meta
       *  16 = Control
       * plus will add in our own Double-Click reporting
       *  32 = Double Click
       */
      key_state = ((MEvent.state & ShiftMask) ? 4 : 0)
                  + ((MEvent.state & ModMetaMask) ? 8 : 0)
                  + ((MEvent.state & ControlMask) ? 16 : 0);
#ifdef MOUSE_REPORT_DOUBLECLICK
      key_state += ((MEvent.clicks > 1) ? 32 : 0);
#endif

    }

#ifdef DEBUG_MOUSEREPORT
  fprintf (stderr, "Mouse [");
  if (key_state & 16)
    fputc ('C', stderr);
  if (key_state & 4)
    fputc ('S', stderr);
  if (key_state & 8)
    fputc ('A', stderr);
  if (key_state & 32)
    fputc ('2', stderr);
  fprintf (stderr, "]: <%d>, %d/%d\n",
          button_number,
          x + 1,
          y + 1);
#else
  tt_printf ("\033[M%c%c%c",
            (32 + button_number + key_state),
            (32 + x + 1),
            (32 + y + 1));
#endif
}

#ifdef USING_W11LIB
void
rxvt_W11_process_x_event (XEvent *ev)
{
  rxvt_t *r = rxvt_get_r ();

  x_cb (*ev);
}
#endif

/*{{{ process an X event */
void
rxvt_term::x_cb (XEvent &ev)
{
  SET_R (this);
  SET_LOCALE (locale);

#if defined(CURSOR_BLINK)
  if ((Options & Opt_cursorBlink) && ev.type == KeyPress)
    {
      if (hidden_cursor)
        {
          hidden_cursor = 0;
          want_refresh = 1;
        }

      cursor_blink_ev.start (NOW + BLINK_INTERVAL);
    }
#endif

#if defined(POINTER_BLANK)
  if ((Options & Opt_pointerBlank) && pointerBlankDelay > 0)
    {
      if (ev.type == MotionNotify
          || ev.type == ButtonPress
          || ev.type == ButtonRelease)
        if (hidden_pointer)
          pointer_unblank ();

      if (ev.type == KeyPress && hidden_pointer == 0)
        pointer_blank ();
    }
#endif

#ifdef USE_XIM
  if (XFilterEvent (&ev, None))
    return;
#endif

  Window          unused_root, unused_child;
  int             unused_root_x, unused_root_y;
  unsigned int    unused_mask;

#ifdef DEBUG_X
  const char *const eventnames[] =
    {                           /* mason - this matches my system */
      "",
      "",
      "KeyPress",
      "KeyRelease",
      "ButtonPress",
      "ButtonRelease",
      "MotionNotify",
      "EnterNotify",
      "LeaveNotify",
      "FocusIn",
      "FocusOut",
      "KeymapNotify",
      "Expose",
      "GraphicsExpose",
      "NoExpose",
      "VisibilityNotify",
      "CreateNotify",
      "DestroyNotify",
      "UnmapNotify",
      "MapNotify",
      "MapRequest",
      "ReparentNotify",
      "ConfigureNotify",
      "ConfigureRequest",
      "GravityNotify",
      "ResizeRequest",
      "CirculateNotify",
      "CirculateRequest",
      "PropertyNotify",
      "SelectionClear",
      "SelectionRequest",
      "SelectionNotify",
      "ColormapNotify",
      "ClientMessage",
      "MappingNotify"
    };
#endif

#ifdef DEBUG_X
  struct timeval  tp;
  struct tm      *ltt;
  (void)gettimeofday (&tp, NULL);
  ltt = localtime (& (tp.tv_sec));
  D_X ((stderr, "Event: %-16s %-7s %08lx (%4d-%02d-%02d %02d:%02d:%02d.%.6ld) %s %lu", eventnames[ev.type], (ev.xany.window == TermWin.parent[0] ? "parent" : (ev.xany.window == TermWin.vt ? "vt" : (ev.xany.window == scrollBar.win ? "scroll" : (ev.xany.window == menuBar.win ? "menubar" : "UNKNOWN")))), (ev.xany.window == TermWin.parent[0] ? TermWin.parent[0] : (ev.xany.window == TermWin.vt ? TermWin.vt : (ev.xany.window == scrollBar.win ? scrollBar.win : (ev.xany.window == menuBar.win ? menuBar.win : 0)))), ltt->tm_year + 1900, ltt->tm_mon + 1, ltt->tm_mday, ltt->tm_hour, ltt->tm_min, ltt->tm_sec, tp.tv_usec, ev.xany.send_event ? "S" : " ", ev.xany.serial));
#endif

  switch (ev.type)
    {
      case KeyPress:
        if (!(iso14755buf & ISO_14755_ESCAPE_NEXT))
          lookup_key (ev.xkey);

        break;

      case KeyRelease:
        {
#if (defined(MOUSE_WHEEL) && defined(MOUSE_SLIP_WHEELING)) || !defined (NO_FRILLS)
          KeySym ks;

          ks = XLookupKeysym (&ev.xkey, ev.xkey.state & ShiftMask ? 1 : 0); // sorry, only shift supported :/
#endif

#ifndef NO_FRILLS
          // ISO 14755 support
          if (iso14755buf)
            if (iso14755buf & ISO_14755_ESCAPE_NEXT)
              {
                // iso14755 part 5.2 handling: release time
                // first: controls
                if ((ev.xkey.state & ControlMask)
                     && ((ks >= 0x40 && ks <= 0x5f)
                         || (ks >= 0x61 && ks <= 0x7f)))
                  {
                    iso14755buf = ISO_14755_KEYCODE_VALID | 0x2400 | (ks & 0x1f);
                    commit_iso14755 ();
                    return; // case-break;
                  }

                for (unsigned short *i = iso14755_symtab; i[0]; i+= 2)
                  if (i[0] == ks)
                    {
                      iso14755buf = ISO_14755_KEYCODE_VALID | i[1];
                      commit_iso14755 ();
                      return; // case-break;
                    }

                iso14755buf = 0;
                scr_bell ();
                break;
              }
            else if ((ev.xkey.state & (ShiftMask | ControlMask)) != (ShiftMask | ControlMask))
              {
                if (iso14755buf & ISO_14755_KEYCODE_VALID)
                  commit_iso14755 ();
                else if (iso14755buf & ISO_14755_ACTIVE)
                  iso14755buf = ISO_14755_ESCAPE_NEXT; // iso14755 part 5.2: remember empty begin/end pair
              }
#endif

#if defined(MOUSE_WHEEL) && defined(MOUSE_SLIP_WHEELING)
          if (!(ev.xkey.state & ControlMask))
            slip_wheel_ev.stop ();
          else if (ks == XK_Control_L || ks == XK_Control_R)
            mouse_slip_wheel_speed = 0;
#endif
          break;
        }

      case ButtonPress:
        button_press (ev.xbutton);
        break;

      case ButtonRelease:
        button_release (ev.xbutton);
        break;

      case ClientMessage:
        if (ev.xclient.format == 32
            && (Atom)ev.xclient.data.l[0] == xa[XA_WMDELETEWINDOW])
          destroy ();
#ifdef OFFIX_DND
        /* OffiX Dnd (drag 'n' drop) protocol */
        else if (ev.xclient.message_type == xa[XA_DNDPROTOCOL]
                 && (ev.xclient.data.l[0] == DndFile
                     || ev.xclient.data.l[0] == DndDir
                     || ev.xclient.data.l[0] == DndLink))
          {
            /* Get Dnd data */
            Atom ActualType;
            int ActualFormat;
            unsigned char *data;
            unsigned long Size, RemainingBytes;

            XGetWindowProperty (display->display, display->root,
                               xa[XA_DNDSELECTION],
                               0L, 1000000L,
                               False, AnyPropertyType,
                               &ActualType, &ActualFormat,
                               &Size, &RemainingBytes,
                               &data);
            XChangeProperty (display->display, display->root,
                            XA_CUT_BUFFER0, XA_STRING,
                            8, PropModeReplace,
                            data, STRLEN (data));
            XFree (data);
            selection_paste (display->root, XA_CUT_BUFFER0, True);
            XSetInputFocus (display->display, display->root, RevertToNone, CurrentTime);
          }
#endif                          /* OFFIX_DND */
        break;

      case MappingNotify:
        XRefreshKeyboardMapping (&ev.xmapping);
        break;

        /*
         * XXX: this is not the _current_ arrangement
         * Here's my conclusion:
         * If the window is completely unobscured, use bitblt's
         * to scroll. Even then, they're only used when doing partial
         * screen scrolling. When partially obscured, we have to fill
         * in the GraphicsExpose parts, which means that after each refresh,
         * we need to wait for the graphics expose or Noexpose events,
         * which ought to make things real slow!
         */
      case VisibilityNotify:
        switch (ev.xvisibility.state)
          {
            case VisibilityUnobscured:
              refresh_type = FAST_REFRESH;
              break;
            case VisibilityPartiallyObscured:
              refresh_type = SLOW_REFRESH;
              break;
            default:
              refresh_type = NO_REFRESH;
              break;
          }
        break;

      case FocusIn:
        if (!TermWin.focus)
          {
            TermWin.focus = 1;
            want_refresh = 1;
#ifdef USE_XIM
            if (Input_Context != NULL)
              XSetICFocus (Input_Context);
#endif
#ifdef CURSOR_BLINK
            if (Options & Opt_cursorBlink)
              cursor_blink_ev.start (NOW + BLINK_INTERVAL);
#endif
#ifdef OFF_FOCUS_FADING
            if (rs[Rs_fade])
              {
                PixColors = PixColorsFocused;
                set_colorfgbg ();
                scr_clear ();
                scr_touch (true);
              }
#endif

          }
        break;

      case FocusOut:
        if (TermWin.focus)
          {
            TermWin.focus = 0;
            want_refresh = 1;
#ifdef USE_XIM
            if (Input_Context != NULL)
              XUnsetICFocus (Input_Context);
#endif
#ifdef CURSOR_BLINK
            if (Options & Opt_cursorBlink)
              cursor_blink_ev.stop ();
            hidden_cursor = 0;
#endif
#ifdef OFF_FOCUS_FADING
            if (rs[Rs_fade])
              {
                PixColors = PixColorsUnFocused;
                set_colorfgbg ();
                scr_clear ();
                scr_touch (true);
              }
#endif

          }
        break;

      case ConfigureNotify:
        if (ev.xconfigure.window == TermWin.parent[0])
          {
            int height, width;

            do
              { /* Wrap lots of configures into one */
                width = ev.xconfigure.width;
                height = ev.xconfigure.height;
                D_SIZE ((stderr, "Size: ConfigureNotify: %4d x %4d", width, height));
              }
            while (XCheckTypedWindowEvent (display->display, ev.xconfigure.window, ConfigureNotify, &ev));

            if (szHint.width != width || szHint.height != height)
              resize_all_windows (width, height, 1);

#ifdef TRANSPARENT              /* XXX: maybe not needed - leave in for now */
            if (Options & Opt_transparent)
              {
                check_our_parents ();
                if (am_transparent)
                  want_refresh = want_full_refresh = 1;
              }
#endif
          }
        break;

      case PropertyNotify:
        if (ev.xproperty.atom == xa[XA_VT_SELECTION]
            && ev.xproperty.state == PropertyNewValue)
          selection_property (ev.xproperty.window, ev.xproperty.atom);

        break;

      case SelectionClear:
        selection_clear ();
        break;

      case SelectionNotify:
        if (selection_wait == Sel_normal)
          selection_paste (ev.xselection.requestor,
                           ev.xselection.property, True);
        break;

      case SelectionRequest:
        selection_send (ev.xselectionrequest);
        break;

      case UnmapNotify:
        TermWin.mapped = 0;
#ifdef TEXT_BLINK
        text_blink_ev.stop ();
#endif
        break;

      case MapNotify:
        TermWin.mapped = 1;
#ifdef TEXT_BLINK
        text_blink_ev.start (NOW + TEXT_BLINK_INTERVAL);
#endif
        break;

#ifdef TRANSPARENT
      case ReparentNotify:
        rootwin_cb (ev);
        break;
#endif                          /* TRANSPARENT */

      case GraphicsExpose:
      case Expose:
        if (ev.xany.window == TermWin.vt)
          {
            do
              scr_expose (ev.xexpose.x, ev.xexpose.y,
                          ev.xexpose.width, ev.xexpose.height, False);
            while (XCheckTypedWindowEvent (display->display, TermWin.vt, ev.xany.type, &ev));

            ev.xany.type = ev.xany.type == Expose ? GraphicsExpose : Expose;

            while (XCheckTypedWindowEvent (display->display, TermWin.vt, ev.xany.type, &ev))
              scr_expose (ev.xexpose.x, ev.xexpose.y,
                          ev.xexpose.width, ev.xexpose.height, False);

            scr_refresh (refresh_type);
          }
        else
          {
            XEvent unused_event;

            while (XCheckTypedWindowEvent (display->display, ev.xany.window, Expose, &unused_event))
              ;
            while (XCheckTypedWindowEvent (display->display, ev.xany.window, GraphicsExpose, &unused_event))
              ;

            if (isScrollbarWindow (ev.xany.window))
              {
                scrollBar.setIdle ();
                scrollbar_show (0);
              }
#ifdef MENUBAR
            if (menubar_visible () && isMenuBarWindow (ev.xany.window))
              menubar_expose ();
#endif

#ifdef TRANSPARENT
            if (am_transparent && ev.xany.window == TermWin.parent[0])
              XClearWindow (display->display, ev.xany.window);
#endif
          }
        break;

      case MotionNotify:
#ifdef POINTER_BLANK
        if (hidden_pointer)
          pointer_unblank ();
#endif
#if MENUBAR
        if (isMenuBarWindow (ev.xany.window))
          {
            menubar_control (ev.xbutton);
            break;
          }
#endif
        if ((PrivateModes & PrivMode_mouse_report) && ! (bypass_keystate))
          break;

        if (ev.xany.window == TermWin.vt)
          {
            if ((ev.xbutton.state & (Button1Mask | Button3Mask)))
              {
                while (XCheckTypedWindowEvent (display->display, TermWin.vt, MotionNotify, &ev))
                  ;

                XQueryPointer (display->display, TermWin.vt,
                              &unused_root, &unused_child,
                              &unused_root_x, &unused_root_y,
                              & (ev.xbutton.x), & (ev.xbutton.y),
                              &unused_mask);
#ifdef MOUSE_THRESHOLD
                /* deal with a `jumpy' mouse */
                if ((ev.xmotion.time - MEvent.time) > MOUSE_THRESHOLD)
                  {
#endif
                    selection_extend ((ev.xbutton.x), (ev.xbutton.y),
                                      (ev.xbutton.state & Button3Mask) ? 2 : 0);
#ifdef SELECTION_SCROLLING
                    if (ev.xbutton.y < TermWin.int_bwidth
                        || Pixel2Row (ev.xbutton.y) > (TermWin.nrow-1))
                      {
                        int dist;

                        /* don't clobber the current delay if we are
                         * already in the middle of scrolling.
                         */
                        if (!sel_scroll_ev.active)
                          sel_scroll_ev.start (NOW + SCROLLBAR_INITIAL_DELAY);

                        /* save the event params so we can highlight
                         * the selection in the pending-scroll loop
                         */
                        selection_save_x=ev.xbutton.x;
                        selection_save_y=ev.xbutton.y;
                        selection_save_state=
                          (ev.xbutton.state & Button3Mask) ? 2 : 0;

                        /* calc number of lines to scroll */
                        if (ev.xbutton.y<TermWin.int_bwidth)
                          {
                            scroll_selection_dir = UP;
                            dist = TermWin.int_bwidth - ev.xbutton.y;
                          }
                        else
                          {
                            scroll_selection_dir = DN;
                            dist = ev.xbutton.y -
                                   (TermWin.int_bwidth + TermWin.height);
                          }
                        scroll_selection_lines= (Pixel2Height (dist)/
                                                SELECTION_SCROLL_LINE_SPEEDUP)+1;
                        MIN_IT (scroll_selection_lines,
                               SELECTION_SCROLL_MAX_LINES);
                      }
                    else
                      {
                        /* we are within the text window, so we
                         * shouldn't be scrolling
                         */
                        if (sel_scroll_ev.active)
                          sel_scroll_ev.stop();
                      }
#endif
#ifdef MOUSE_THRESHOLD

                  }
#endif

              }
          }
        else if (isScrollbarWindow (ev.xany.window) && scrollbar_isMotion ())
          {
            while (XCheckTypedWindowEvent (display->display, scrollBar.win,
                                          MotionNotify, &ev)) ;
            XQueryPointer (display->display, scrollBar.win,
                          &unused_root, &unused_child,
                          &unused_root_x, &unused_root_y,
                          & (ev.xbutton.x), & (ev.xbutton.y),
                          &unused_mask);
            scr_move_to (scrollbar_position (ev.xbutton.y) - csrO,
                         scrollbar_size ());
            scr_refresh (refresh_type);
            refresh_limit = 0;
            scrollbar_show (1);
          }
        break;
    }
}

#if TRANSPARENT
void
rxvt_term::rootwin_cb (XEvent &ev)
{
  SET_R (this);
  SET_LOCALE (locale);

  switch (ev.type)
    {
      case PropertyNotify:
        /*
         * if user used some Esetroot compatible prog to set the root bg,
         * use the property to determine the pixmap.  We use it later on.
         */
        if (xa[XA_XROOTPMAPID] == 0)
          xa[XA_XROOTPMAPID] = XInternAtom (display->display, "_XROOTPMAP_ID", False);

        if (ev.xproperty.atom != xa[XA_XROOTPMAPID])
          return;

        /* FALLTHROUGH */
      case ReparentNotify:
        if ((Options & Opt_transparent) && check_our_parents () && am_transparent)
          want_refresh = want_full_refresh = 1;
        break;
    }
}
#endif

void
rxvt_term::button_press (XButtonEvent &ev)
{
  int reportmode = 0, clickintime;

  bypass_keystate = ev.state & (ModMetaMask | ShiftMask);
  if (!bypass_keystate)
    reportmode = !! (PrivateModes & PrivMode_mouse_report);
  /*
   * VT window processing of button press
   */
  if (ev.window == TermWin.vt)
    {
      clickintime = ev.time - MEvent.time < MULTICLICK_TIME;
      if (reportmode)
        {
          /* mouse report from vt window */
          /* save the xbutton state (for ButtonRelease) */
          MEvent.state = ev.state;
#ifdef MOUSE_REPORT_DOUBLECLICK
          if (ev.button == MEvent.button && clickintime)
            {
              /* same button, within alloted time */
              MEvent.clicks++;
              if (MEvent.clicks > 1)
                {
                  /* only report double clicks */
                  MEvent.clicks = 2;
                  mouse_report (ev);

                  /* don't report the release */
                  MEvent.clicks = 0;
                  MEvent.button = AnyButton;
                }
            }
          else
            {
              /* different button, or time expired */
              MEvent.clicks = 1;
              MEvent.button = ev.button;
              mouse_report (ev);
            }
#else
          MEvent.button = ev.button;
          mouse_report (ev);
#endif                          /* MOUSE_REPORT_DOUBLECLICK */

        }
      else
        {
          if (ev.button != MEvent.button)
            MEvent.clicks = 0;
          switch (ev.button)
            {
              case Button1:
                /* allow shift+left click to extend selection */
                if (ev.state & ShiftMask && ! (PrivateModes & PrivMode_mouse_report))
                  {
                    if (MEvent.button == Button1 && clickintime)
                      selection_rotate (ev.x, ev.y);
                    else
                      selection_extend (ev.x, ev.y, 1);
                  }
                else
                  {
                    if (MEvent.button == Button1 && clickintime)
                      MEvent.clicks++;
                    else
                      MEvent.clicks = 1;

                    selection_click (MEvent.clicks, ev.x, ev.y);
                  }

                MEvent.button = Button1;
                break;

              case Button3:
                if (MEvent.button == Button3 && clickintime)
                  selection_rotate (ev.x, ev.y);
                else
                  selection_extend (ev.x, ev.y, 1);
                MEvent.button = Button3;
                break;
            }
        }
      MEvent.time = ev.time;
      return;
    }

  /*
   * Scrollbar window processing of button press
   */
  if (isScrollbarWindow (ev.window))
    {
      scrollBar.setIdle ();
      /*
       * Rxvt-style scrollbar:
       * move up if mouse is above slider
       * move dn if mouse is below slider
       *
       * XTerm-style scrollbar:
       * Move display proportional to pointer location
       * pointer near top -> scroll one line
       * pointer near bot -> scroll full page
       */
#ifndef NO_SCROLLBAR_REPORT
      if (reportmode)
        {
          /*
           * Mouse report disabled scrollbar:
           * arrow buttons - send up/down
           * click on scrollbar - send pageup/down
           */
          if ((scrollBar.style == R_SB_NEXT
               && scrollbarnext_upButton (ev.y))
              || (scrollBar.style == R_SB_RXVT
                  && scrollbarrxvt_upButton (ev.y)))
            tt_printf ("\033[A");
          else if ((scrollBar.style == R_SB_NEXT
                    && scrollbarnext_dnButton (ev.y))
                   || (scrollBar.style == R_SB_RXVT
                       && scrollbarrxvt_dnButton (ev.y)))
            tt_printf ("\033[B");
          else
            switch (ev.button)
              {
                case Button2:
                  tt_printf ("\014");
                  break;
                case Button1:
                  tt_printf ("\033[6~");
                  break;
                case Button3:
                  tt_printf ("\033[5~");
                  break;
              }
        }
      else
#endif                          /* NO_SCROLLBAR_REPORT */

        {
          char            upordown = 0;

          if (scrollBar.style == R_SB_NEXT)
            {
              if (scrollbarnext_upButton (ev.y))
                upordown = -1;  /* up */
              else if (scrollbarnext_dnButton (ev.y))
                upordown = 1;   /* down */
            }
          else if (scrollBar.style == R_SB_RXVT)
            {
              if (scrollbarrxvt_upButton (ev.y))
                upordown = -1;  /* up */
              else if (scrollbarrxvt_dnButton (ev.y))
                upordown = 1;   /* down */
            }
          if (upordown)
            {
#ifndef NO_SCROLLBAR_BUTTON_CONTINUAL_SCROLLING
              cont_scroll_ev.start (NOW + SCROLLBAR_INITIAL_DELAY);
#endif
              if (scr_page (upordown < 0 ? UP : DN, 1))
                {
                  if (upordown < 0)
                    scrollBar.setUp ();
                  else
                    scrollBar.setDn ();
                }
            }
          else
            switch (ev.button)
              {
                case Button2:
                  switch (scrollbar_align)
                    {
                      case R_SB_ALIGN_TOP:
                        csrO = 0;
                        break;
                      case R_SB_ALIGN_CENTRE:
                        csrO = (scrollBar.bot - scrollBar.top) / 2;
                        break;
                      case R_SB_ALIGN_BOTTOM:
                        csrO = scrollBar.bot - scrollBar.top;
                        break;
                    }

                  if (scrollBar.style == R_SB_XTERM
                      || scrollbar_above_slider (ev.y)
                      || scrollbar_below_slider (ev.y))
                    scr_move_to (scrollbar_position (ev.y) - csrO, scrollbar_size ());

                  scrollBar.setMotion ();
                  break;

                case Button1:
                  if (scrollbar_align == R_SB_ALIGN_CENTRE)
                    csrO = ev.y - scrollBar.top;
                  /* FALLTHROUGH */

                case Button3:
                  if (scrollBar.style != R_SB_XTERM)
                    {
                      if (scrollbar_above_slider (ev.y))
# ifdef RXVT_SCROLL_FULL
                        scr_page (UP, TermWin.nrow - 1);
# else
                        scr_page (UP, TermWin.nrow / 4);
# endif
                      else if (scrollbar_below_slider (ev.y))
# ifdef RXVT_SCROLL_FULL
                        scr_page (DN, TermWin.nrow - 1);
# else
                        scr_page (DN, TermWin.nrow / 4);
# endif
                      else
                        scrollBar.setMotion ();
                    }
                  else
                    {
                      scr_page ((ev.button == Button1 ? DN : UP),
                                (TermWin.nrow
                                 * scrollbar_position (ev.y)
                                 / scrollbar_size ()));
                    }

                  break;
              }
        }
      return;
    }
#if MENUBAR
  /*
   * Menubar window processing of button press
   */
  if (isMenuBarWindow (ev.window))
    menubar_control (ev);
#endif
}

void
rxvt_term::button_release (XButtonEvent &ev)
{
  int reportmode = 0;

  csrO = 0;             /* reset csr Offset */
  if (!bypass_keystate)
    reportmode = !! (PrivateModes & PrivMode_mouse_report);

  if (scrollbar_isUpDn ())
    {
      scrollBar.setIdle ();
      scrollbar_show (0);
#ifndef NO_SCROLLBAR_BUTTON_CONTINUAL_SCROLLING
      refresh_type &= ~SMOOTH_REFRESH;
#endif

    }
#ifdef SELECTION_SCROLLING
  if (sel_scroll_ev.active)
    sel_scroll_ev.stop();
#endif
  if (ev.window == TermWin.vt)
    {
      if (reportmode)
        {
          /* mouse report from vt window */
          /* don't report release of wheel "buttons" */
          if (ev.button >= 4)
            return;
#ifdef MOUSE_REPORT_DOUBLECLICK
          /* only report the release of 'slow' single clicks */
          if (MEvent.button != AnyButton
              && (ev.button != MEvent.button
                  || (ev.time - MEvent.time
                      > MULTICLICK_TIME / 2)))
            {
              MEvent.clicks = 0;
              MEvent.button = AnyButton;
              mouse_report (ev);
            }
#else                           /* MOUSE_REPORT_DOUBLECLICK */
          MEvent.button = AnyButton;
          mouse_report (ev);
#endif                          /* MOUSE_REPORT_DOUBLECLICK */
          return;
        }
      /*
       * dumb hack to compensate for the failure of click-and-drag
       * when overriding mouse reporting
       */
      if (PrivateModes & PrivMode_mouse_report
          && bypass_keystate
          && ev.button == Button1 && MEvent.clicks <= 1)
        selection_extend (ev.x, ev.y, 0);

      switch (ev.button)
        {
          case Button1:
          case Button3:
            selection_make (ev.time);
            break;
          case Button2:
            selection_request (ev.time, ev.x, ev.y);
            break;
#ifdef MOUSE_WHEEL
          case Button4:
          case Button5:
            {
              int i;
              page_dirn v;

              v = ev.button == Button4 ? UP : DN;

              if (ev.state & ShiftMask)
                i = 1;
              else if (Options & Opt_mouseWheelScrollPage)
                i = TermWin.nrow - 1;
              else
                i = 5;

# ifdef MOUSE_SLIP_WHEELING
              if (ev.state & ControlMask)
                {
                  mouse_slip_wheel_speed += v ? -1 : 1;
                  if (mouse_slip_wheel_speed < -TermWin.nrow) mouse_slip_wheel_speed = -TermWin.nrow;
                  if (mouse_slip_wheel_speed > +TermWin.nrow) mouse_slip_wheel_speed = +TermWin.nrow;

                  if (slip_wheel_ev.at < NOW)
                    slip_wheel_ev.at = NOW + SCROLLBAR_CONTINUOUS_DELAY;

                  slip_wheel_ev.start ();
                }
              else
                {
# endif
# ifdef JUMP_MOUSE_WHEEL
                  scr_page (v, i);
                  scr_refresh (SMOOTH_REFRESH);
                  scrollbar_show (1);
# else
                  while (i--)
                    {
                      scr_page (v, 1);
                      scr_refresh (SMOOTH_REFRESH);
                      scrollbar_show (1);
                    }
# endif
# ifdef MOUSE_SLIP_WHEELING
                }
#endif
            }
            break;
#endif
        }
    }
#ifdef MENUBAR
  else if (isMenuBarWindow (ev.window))
    menubar_control (ev);
#endif
}

#ifdef TRANSPARENT
#if TINTING
/* taken from aterm-0.4.2 */

typedef uint32_t RUINT32T;

void ShadeXImage(rxvt_display *display, XImage* srcImage, int shade, int rm, int gm, int bm)
{
  int sh_r, sh_g, sh_b;
  RUINT32T mask_r, mask_g, mask_b;
  RUINT32T *lookup, *lookup_r, *lookup_g, *lookup_b;
  unsigned int lower_lim_r, lower_lim_g, lower_lim_b;
  unsigned int upper_lim_r, upper_lim_g, upper_lim_b;
  int i;

  Visual* visual = display->visual;

  if( visual->c_class != TrueColor || srcImage->format != ZPixmap ) return ;

  /* for convenience */
  mask_r = visual->red_mask;
  mask_g = visual->green_mask;
  mask_b = visual->blue_mask;

  /* boring lookup table pre-initialization */
  switch (srcImage->bits_per_pixel) {
    case 15:
      if ((mask_r != 0x7c00) ||
          (mask_g != 0x03e0) ||
          (mask_b != 0x001f))
        return;
        lookup = (RUINT32T *) malloc (sizeof (RUINT32T)*(32+32+32));
        lookup_r = lookup;
        lookup_g = lookup+32;
        lookup_b = lookup+32+32;
        sh_r = 10;
        sh_g = 5;
        sh_b = 0;
      break;
    case 16:
      if ((mask_r != 0xf800) ||
          (mask_g != 0x07e0) ||
          (mask_b != 0x001f))
        return;
        lookup = (RUINT32T *) malloc (sizeof (RUINT32T)*(32+64+32));
        lookup_r = lookup;
        lookup_g = lookup+32;
        lookup_b = lookup+32+64;
        sh_r = 11;
        sh_g = 5;
        sh_b = 0;
      break;
    case 24:
      if ((mask_r != 0xff0000) ||
          (mask_g != 0x00ff00) ||
          (mask_b != 0x0000ff))
        return;
        lookup = (RUINT32T *) malloc (sizeof (RUINT32T)*(256+256+256));
        lookup_r = lookup;
        lookup_g = lookup+256;
        lookup_b = lookup+256+256;
        sh_r = 16;
        sh_g = 8;
        sh_b = 0;
      break;
    case 32:
      if ((mask_r != 0xff0000) ||
          (mask_g != 0x00ff00) ||
          (mask_b != 0x0000ff))
        return;
        lookup = (RUINT32T *) malloc (sizeof (RUINT32T)*(256+256+256));
        lookup_r = lookup;
        lookup_g = lookup+256;
        lookup_b = lookup+256+256;
        sh_r = 16;
        sh_g = 8;
        sh_b = 0;
      break;
    default:
      return; /* we do not support this color depth */
  }

  /* prepare limits for color transformation (each channel is handled separately) */
  if (shade < 0) {
    shade = -shade;
    if (shade < 0) shade = 0;
    if (shade > 100) shade = 100;

    lower_lim_r = 65535-rm;
    lower_lim_g = 65535-gm;
    lower_lim_b = 65535-bm;

    lower_lim_r = 65535-(unsigned int)(((RUINT32T)lower_lim_r)*((RUINT32T)shade)/100);
    lower_lim_g = 65535-(unsigned int)(((RUINT32T)lower_lim_g)*((RUINT32T)shade)/100);
    lower_lim_b = 65535-(unsigned int)(((RUINT32T)lower_lim_b)*((RUINT32T)shade)/100);

    upper_lim_r = upper_lim_g = upper_lim_b = 65535;
  } else {
    if (shade < 0) shade = 0;
    if (shade > 100) shade = 100;

    lower_lim_r = lower_lim_g = lower_lim_b = 0;

    upper_lim_r = (unsigned int)((((RUINT32T)rm)*((RUINT32T)shade))/100);
    upper_lim_g = (unsigned int)((((RUINT32T)gm)*((RUINT32T)shade))/100);
    upper_lim_b = (unsigned int)((((RUINT32T)bm)*((RUINT32T)shade))/100);
  }

  /* switch red and blue bytes if necessary, we need it for some weird XServers like XFree86 3.3.3.1 */
  if ((srcImage->bits_per_pixel == 24) && (mask_r >= 0xFF0000 ))
  {
    unsigned int tmp;

    tmp = lower_lim_r;
    lower_lim_r = lower_lim_b;
    lower_lim_b = tmp;

    tmp = upper_lim_r;
    upper_lim_r = upper_lim_b;
    upper_lim_b = tmp;
  }

  /* fill our lookup tables */
  for (i = 0; i <= mask_r>>sh_r; i++)
  {
    RUINT32T tmp;
    tmp = ((RUINT32T)i)*((RUINT32T)(upper_lim_r-lower_lim_r));
    tmp += ((RUINT32T)(mask_r>>sh_r))*((RUINT32T)lower_lim_r);
    lookup_r[i] = (tmp/65535)<<sh_r;
  }
  for (i = 0; i <= mask_g>>sh_g; i++)
  {
    RUINT32T tmp;
    tmp = ((RUINT32T)i)*((RUINT32T)(upper_lim_g-lower_lim_g));
    tmp += ((RUINT32T)(mask_g>>sh_g))*((RUINT32T)lower_lim_g);
    lookup_g[i] = (tmp/65535)<<sh_g;
  }
  for (i = 0; i <= mask_b>>sh_b; i++)
  {
    RUINT32T tmp;
    tmp = ((RUINT32T)i)*((RUINT32T)(upper_lim_b-lower_lim_b));
    tmp += ((RUINT32T)(mask_b>>sh_b))*((RUINT32T)lower_lim_b);
    lookup_b[i] = (tmp/65535)<<sh_b;
  }

  /* apply table to input image (replacing colors by newly calculated ones) */
  switch (srcImage->bits_per_pixel)
  {
    case 15:
    {
      unsigned short *p1, *pf, *p, *pl;
      p1 = (unsigned short *) srcImage->data;
      pf = (unsigned short *) (srcImage->data + srcImage->height * srcImage->bytes_per_line);
      while (p1 < pf)
      {
        p = p1;
        pl = p1 + srcImage->width;
        for (; p < pl; p++)
        {
          *p = lookup_r[(*p & 0x7c00)>>10] |
               lookup_g[(*p & 0x03e0)>> 5] |
               lookup_b[(*p & 0x001f)];
        }
        p1 = (unsigned short *) ((char *) p1 + srcImage->bytes_per_line);
      }
      break;
    }
    case 16:
    {
      unsigned short *p1, *pf, *p, *pl;
      p1 = (unsigned short *) srcImage->data;
      pf = (unsigned short *) (srcImage->data + srcImage->height * srcImage->bytes_per_line);
      while (p1 < pf)
      {
        p = p1;
        pl = p1 + srcImage->width;
        for (; p < pl; p++)
        {
          *p = lookup_r[(*p & 0xf800)>>11] |
               lookup_g[(*p & 0x07e0)>> 5] |
               lookup_b[(*p & 0x001f)];
        }
        p1 = (unsigned short *) ((char *) p1 + srcImage->bytes_per_line);
      }
      break;
    }
    case 24:
    {
      unsigned char *p1, *pf, *p, *pl;
      p1 = (unsigned char *) srcImage->data;
      pf = (unsigned char *) (srcImage->data + srcImage->height * srcImage->bytes_per_line);
      while (p1 < pf)
      {
        p = p1;
        pl = p1 + srcImage->width * 3;
        for (; p < pl; p += 3)
        {
          p[0] = lookup_r[(p[0] & 0xff0000)>>16];
          p[1] = lookup_r[(p[1] & 0x00ff00)>> 8];
          p[2] = lookup_r[(p[2] & 0x0000ff)];
        }
        p1 = (unsigned char *) ((char *) p1 + srcImage->bytes_per_line);
      }
      break;
    }
    case 32:
    {
      RUINT32T *p1, *pf, *p, *pl;
      p1 = (RUINT32T *) srcImage->data;
      pf = (RUINT32T *) (srcImage->data + srcImage->height * srcImage->bytes_per_line);

      while (p1 < pf)
      {
        p = p1;
        pl = p1 + srcImage->width;
        for (; p < pl; p++)
        {
          *p = lookup_r[(*p & 0xff0000)>>16] |
               lookup_g[(*p & 0x00ff00)>> 8] |
               lookup_b[(*p & 0x0000ff)] |
               (*p & ~0xffffff);
        }
        p1 = (RUINT32T *) ((char *) p1 + srcImage->bytes_per_line);
      }
      break;
    }
  }

  free (lookup);
}
#endif

/*
 * Check our parents are still who we think they are.
 * Do transparency updates if required
 */
int
rxvt_term::check_our_parents ()
{
  int i, pchanged, aformat, have_pixmap, rootdepth;
  unsigned long nitems, bytes_after;
  Atom atype;
  unsigned char *prop = NULL;
  Window root, oldp, *list;
  Pixmap rootpixmap = None;
  XWindowAttributes wattr, wrootattr;

  pchanged = 0;

  if (!(Options & Opt_transparent))
    return pchanged;    /* Don't try any more */

  XGetWindowAttributes (display->display, display->root, &wrootattr);
  rootdepth = wrootattr.depth;

  XGetWindowAttributes (display->display, TermWin.parent[0], &wattr);

  if (rootdepth != wattr.depth)
    {
      if (am_transparent)
        {
          pchanged = 1;
          XSetWindowBackground (display->display, TermWin.vt, PixColorsFocused[Color_bg]);
          am_transparent = am_pixmap_trans = 0;
        }

      return pchanged;  /* Don't try any more */
    }

  /* Get all X ops out of the queue so that our information is up-to-date. */
  XSync (display->display, False);

  /*
   * Make the frame window set by the window manager have
   * the root background. Some window managers put multiple nested frame
   * windows for each client, so we have to take care about that.
   */
  i = (xa[XA_XROOTPMAPID]
       && XGetWindowProperty (display->display, display->root, xa[XA_XROOTPMAPID],
                              0L, 1L, False, XA_PIXMAP, &atype, &aformat,
                              &nitems, &bytes_after, &prop) == Success);

  if (!i || prop == NULL)
     i = (xa[XA_XSETROOTID]
          && XGetWindowProperty (display->display, display->root, xa[XA_XSETROOTID],
                                 0L, 1L, False, XA_PIXMAP, &atype, &aformat,
                                 &nitems, &bytes_after, &prop) == Success);

  if (!i || prop == NULL
#if TINTING
      || !rs[Rs_color + Color_tint]
#endif
      )
    have_pixmap = 0;
  else
    {
      have_pixmap = 1;
      rootpixmap = *(Pixmap *)prop;
      XFree (prop);
    }

  if (have_pixmap)
    {
      /*
       * Copy display->root pixmap transparency
       */
      int sx, sy, nx, ny;
      unsigned int nw, nh;
      Window cr;
      XImage *image;
      GC gc;
      XGCValues gcvalue;

      XTranslateCoordinates (display->display, TermWin.parent[0], display->root,
                             0, 0, &sx, &sy, &cr);
      nw = (unsigned int)szHint.width;
      nh = (unsigned int)szHint.height;
      nx = ny = 0;

      if (sx < 0)
        {
          nw += sx;
          nx = -sx;
          sx = 0;
        }

      if (sy < 0)
        {
          nh += sy;
          ny = -sy;
          sy = 0;
        }

      MIN_IT (nw, (unsigned int) (wrootattr.width - sx));
      MIN_IT (nh, (unsigned int) (wrootattr.height - sy));
      allowedxerror = -1;
      image = XGetImage (display->display, rootpixmap, sx, sy, nw, nh, AllPlanes, ZPixmap);

      /* XXX: handle BadMatch - usually because we're outside the pixmap */
      /* XXX: may need a delay here? */
      allowedxerror = 0;

      if (image == NULL)
        {
          if (am_transparent && am_pixmap_trans)
            {
              pchanged = 1;
              if (TermWin.pixmap != None)
                {
                  XFreePixmap (display->display, TermWin.pixmap);
                  TermWin.pixmap = None;
                }
            }

          am_pixmap_trans = 0;
        }
      else
        {
          if (TermWin.pixmap != None)
            XFreePixmap (display->display, TermWin.pixmap);

#if TINTING
          if (ISSET_PIXCOLOR (Color_tint))
            {
              unsigned short rm, gm, bm;
              int shade = rs[Rs_shade] ? atoi (rs[Rs_shade]) : 100;

              PixColorsFocused[Color_tint].get (display, rm, gm, bm);

              ShadeXImage (display, image, shade, rm, gm, bm);
            }
#endif

          TermWin.pixmap = XCreatePixmap (display->display, TermWin.vt,
                                          szHint.width, szHint.height, image->depth);
          gc = XCreateGC (display->display, TermWin.vt, 0UL, &gcvalue);
          XPutImage (display->display, TermWin.pixmap, gc, image, 0, 0,
                     nx, ny, image->width, image->height);
          XFreeGC (display->display, gc);
          XDestroyImage (image);
          XSetWindowBackgroundPixmap (display->display, TermWin.parent[0], TermWin.pixmap);
          XClearWindow (display->display, TermWin.parent[0]);

          if (!am_transparent || !am_pixmap_trans)
            pchanged = 1;

          am_transparent = am_pixmap_trans = 1;
        }
    }

  if (!am_pixmap_trans)
    {
      unsigned int n;
      /*
       * InheritPixmap transparency
       */
      D_X ((stderr, "InheritPixmap Seeking to  %08lx", display->root));
      for (i = 1; i < (int) (sizeof (TermWin.parent) / sizeof (Window)); i++)
        {
          oldp = TermWin.parent[i];
          XQueryTree (display->display, TermWin.parent[i - 1], &root,
                      &TermWin.parent[i], &list, &n);
          XFree (list);
          D_X ((stderr, "InheritPixmap Parent[%d] = %08lx", i, TermWin.parent[i]));

          if (TermWin.parent[i] == display->root)
            {
              if (oldp != None)
                pchanged = 1;

              break;
            }

          if (oldp != TermWin.parent[i])
            pchanged = 1;
        }

      n = 0;

      if (pchanged)
        {
          for (; n < (unsigned int)i; n++)
            {
              XGetWindowAttributes (display->display, TermWin.parent[n], &wattr);
              D_X ((stderr, "InheritPixmap Checking Parent[%d]: %s", n, (wattr.depth == rootdepth && wattr.class != InputOnly) ? "OK" : "FAIL"));
              if (wattr.depth != rootdepth || wattr.c_class == InputOnly)
                {
                  n = (int) (sizeof (TermWin.parent) / sizeof (Window)) + 1;
                  break;
                }
            }
        }

      if (n > (int) (sizeof (TermWin.parent) / sizeof (TermWin.parent[0])))
        {
          D_X ((stderr, "InheritPixmap Turning off"));
          XSetWindowBackground (display->display, TermWin.parent[0], PixColorsFocused[Color_fg]);
          XSetWindowBackground (display->display, TermWin.vt, PixColorsFocused[Color_bg]);
          am_transparent = 0;
          /* XXX: also turn off Opt_transparent? */
        }
      else
        {
#if WAIT_FOR_WM
          /* wait (an arbitrary period) for the WM to do its thing
           * needed for fvwm2.2.2 (and before?) */
          sleep (1);
#endif
          D_X ((stderr, "InheritPixmap Turning on (%d parents)", i - 1));
          for (n = 0; n < (unsigned int)i; n++)
            {
              XSetWindowBackgroundPixmap (display->display, TermWin.parent[n], ParentRelative);
              XClearWindow (display->display, TermWin.parent[n]);
            }

          XSetWindowBackgroundPixmap (display->display, TermWin.vt, ParentRelative);
          am_transparent = 1;
        }

      for (; i < (int) (sizeof (TermWin.parent) / sizeof (Window)); i++)
        TermWin.parent[i] = None;
    }

  // this is experimental
  if (scrollBar.win)
    {
      XSetWindowBackgroundPixmap (display->display, scrollBar.win, ParentRelative);
      XClearWindow (display->display, scrollBar.win);
      scrollBar.setIdle ();
      scrollbar_show (0);
    }

  return pchanged;
}
#endif

/*}}} */

bool
rxvt_term::cmd_parse ()
{
  bool flag = false;
  unicode_t ch = NOCHAR;
  unsigned char *seq_begin; // remember start of esc-sequence here

  for (;;)
    {
      if (ch == NOCHAR)
        {
          seq_begin = cmdbuf_ptr;
          ch = next_char ();
        }

      if (ch == NOCHAR) // TODO: improve
        break;

      if (!IS_CONTROL (ch) || ch == C0_LF || ch == C0_CR || ch == C0_HT)
        {
          /* Read a text string from the input buffer */
          unicode_t buf[UBUFSIZ];
          bool refreshnow = false;
          int nlines = 0;
          unicode_t *str = buf;

          for (;;)
            {
              if (ch == NOCHAR || (IS_CONTROL (ch) && ch != C0_LF && ch != C0_CR && ch != C0_HT))
                break;

              *str++ = ch;

              if (ch == C0_LF)
                {
                  nlines++;
                  refresh_count++;

                  if (!(Options & Opt_jumpScroll)
                      || (refresh_count >= refresh_limit * (TermWin.nrow - 1)))
                    {
                      refreshnow = true;
                      ch = NOCHAR;
                      break;
                    }

                  // scr_add_lines only works for nlines <= TermWin.nrow - 1.
                  if (nlines >= TermWin.nrow - 1)
                    {
                      scr_add_lines (buf, nlines, str - buf);
                      nlines = 0;
                      str = buf;
                    }
                }

              if (str >= buf + UBUFSIZ)
                {
                  ch = NOCHAR;
                  break;
                }

              seq_begin = cmdbuf_ptr;
              ch = next_char ();
            }

          scr_add_lines (buf, nlines, str - buf);

          /*
           * If there have been a lot of new lines, then update the screen
           * What the heck I'll cheat and only refresh less than every page-full.
           * the number of pages between refreshes is refresh_limit, which
           * is incremented here because we must be doing flat-out scrolling.
           */
          if (refreshnow)
            {
              if ((Options & Opt_jumpScroll) && refresh_limit < REFRESH_PERIOD)
                refresh_limit++;
              else
                {
                  flag = true;
                  scr_refresh (refresh_type);
                }
            }

        }
      else
        {
          try
            {
              process_nonprinting (ch);
            }
          catch (const class out_of_input &o)
            {
              // we ran out of input, retry later
              cmdbuf_ptr = seq_begin;
              break;
            }

          ch = NOCHAR;
        }
    }

  return flag;
}

// read the next octet
unicode_t
rxvt_term::next_octet ()
{
  return cmdbuf_ptr < cmdbuf_endp
         ? *cmdbuf_ptr++
         : NOCHAR;
}

// read the next character
unicode_t
rxvt_term::next_char ()
{
  while (cmdbuf_ptr < cmdbuf_endp)
    {
      // assume 7-bit to be ascii ALWAYS
      if (*cmdbuf_ptr <= 0x7f && *cmdbuf_ptr != 0x1b)
        return *cmdbuf_ptr++;

      wchar_t wc;
      size_t len = mbrtowc (&wc, (char *)cmdbuf_ptr, cmdbuf_endp - cmdbuf_ptr, mbstate);

      if (len == (size_t)-2)
        {
          // the mbstate stores incomplete sequences. didn't know this :/
          cmdbuf_ptr = cmdbuf_endp;
          break;
        }

      if (len == (size_t)-1)
        return *cmdbuf_ptr++; // the _occasional_ latin1 character is allowed to slip through

      // assume wchar == unicode
      cmdbuf_ptr += len;
      return wc;
    }

  return NOCHAR;
}

/* rxvt_cmd_getc () - Return next input character */
/*
 * Return the next input character after first passing any keyboard input
 * to the command.
 */
unicode_t
rxvt_term::cmd_getc ()
{
  unicode_t c = next_char ();

  if (c == NOCHAR)
    throw out_of_input;

  return c;
}

unicode_t
rxvt_term::cmd_get8 ()
{
  unicode_t c = next_octet ();

  if (c == NOCHAR)
    throw out_of_input;

  return c;
}

/*{{{ print pipe */
/*----------------------------------------------------------------------*/
#ifdef PRINTPIPE
FILE *
rxvt_term::popen_printer ()
{
  FILE *stream = popen (rs[Rs_print_pipe], "w");

  if (stream == NULL)
    rxvt_warn ("can't open printer pipe, not printing.\n");

  return stream;
}

int
rxvt_term::pclose_printer (FILE *stream)
{
  fflush (stream);
  return pclose (stream);
}

/*
 * simulate attached vt100 printer
 */
void
rxvt_term::process_print_pipe ()
{
  int done;
  FILE *fd;

  if ((fd = popen_printer ()) == NULL)
    return;

  /*
   * Send all input to the printer until either ESC[4i or ESC[?4i
   * is received.
   */
  for (done = 0; !done;)
    {
      unsigned char buf[8];
      unicode_t ch;
      unsigned int i, len;

      if ((ch = cmd_getc ()) != C0_ESC)
        {
          if (putc (ch, fd) == EOF)
            break;              /* done = 1 */
        }
      else
        {
          len = 0;
          buf[len++] = ch;

          if ((buf[len++] = cmd_getc ()) == '[')
            {
              if ((ch = cmd_getc ()) == '?')
                {
                  buf[len++] = '?';
                  ch = cmd_getc ();
                }
              if ((buf[len++] = ch) == '4')
                {
                  if ((buf[len++] = cmd_getc ()) == 'i')
                    break;      /* done = 1 */
                }
            }
          
          for (i = 0; i < len; i++)
            if (putc (buf[i], fd) == EOF)
              {
                done = 1;
                break;
              }
        }
    }

  pclose_printer (fd);
}
#endif                          /* PRINTPIPE */
/*}}} */

/* *INDENT-OFF* */
enum {
  C1_40 = 0x40,
          C1_41 , C1_BPH, C1_NBH, C1_44 , C1_NEL, C1_SSA, C1_ESA,
  C1_HTS, C1_HTJ, C1_VTS, C1_PLD, C1_PLU, C1_RI , C1_SS2, C1_SS3,
  C1_DCS, C1_PU1, C1_PU2, C1_STS, C1_CCH, C1_MW , C1_SPA, C1_EPA,
  C1_SOS, C1_59 , C1_SCI, C1_CSI, CS_ST , C1_OSC, C1_PM , C1_APC,
};
/* *INDENT-ON* */

/*{{{ process non-printing single characters */
void
rxvt_term::process_nonprinting (unicode_t ch)
{
  switch (ch)
    {
      case C0_ESC:
        process_escape_seq ();
        break;
      case C0_ENQ:      /* terminal Status */
        if (rs[Rs_answerbackstring])
          tt_write ((const unsigned char *)rs[Rs_answerbackstring],
                    (unsigned int)STRLEN (rs[Rs_answerbackstring]));
        else
          tt_write ((unsigned char *)VT100_ANS,
                    (unsigned int)STRLEN (VT100_ANS));
        break;
      case C0_BEL:      /* bell */
        scr_bell ();
        break;
      case C0_BS:               /* backspace */
        scr_backspace ();
        break;
      case C0_HT:               /* tab */
        scr_tab (1);
        break;
      case C0_CR:               /* carriage return */
        scr_gotorc (0, 0, R_RELATIVE);
        break;
      case C0_VT:               /* vertical tab, form feed */
      case C0_FF:
      case C0_LF:               /* line feed */
        scr_index (UP);
        break;
      case C0_SO:               /* shift out - acs */
        scr_charset_choose (1);
        break;
      case C0_SI:               /* shift in - acs */
        scr_charset_choose (0);
        break;

#ifdef EIGHT_BIT_CONTROLS
      // 8-bit controls
      case 0x90:        /* DCS */
        process_dcs_seq ();
        break;
      case 0x9b:        /* CSI */
        process_csi_seq ();
        break;
      case 0x9d:        /* CSI */
        process_osc_seq ();
        break;
#endif
    }
}
/*}}} */


/*{{{ process VT52 escape sequences */
void
rxvt_term::process_escape_vt52 (unicode_t ch)
{
  int row, col;

  switch (ch)
    {
      case 'A':         /* cursor up */
        scr_gotorc (-1, 0, R_RELATIVE | C_RELATIVE);
        break;
      case 'B':         /* cursor down */
        scr_gotorc (1, 0, R_RELATIVE | C_RELATIVE);
        break;
      case 'C':         /* cursor right */
        scr_gotorc (0, 1, R_RELATIVE | C_RELATIVE);
        break;
      case 'D':         /* cursor left */
        scr_gotorc (0, -1, R_RELATIVE | C_RELATIVE);
        break;
      case 'H':         /* cursor home */
        scr_gotorc (0, 0, 0);
        break;
      case 'I':         /* cursor up and scroll down if needed */
        scr_index (DN);
        break;
      case 'J':         /* erase to end of screen */
        scr_erase_screen (0);
        break;
      case 'K':         /* erase to end of line */
        scr_erase_line (0);
        break;
      case 'Y':                 /* move to specified row and col */
        /* full command is 'ESC Y row col' where row and col
         * are encoded by adding 32 and sending the ascii
         * character.  eg. SPACE = 0, '+' = 13, '0' = 18,
         * etc. */
        row = cmd_getc () - ' ';
        col = cmd_getc () - ' ';
        scr_gotorc (row, col, 0);
        break;
      case 'Z':         /* identify the terminal type */
        tt_printf ("\033/Z");   /* I am a VT100 emulating a VT52 */
        break;
      case '<':         /* turn off VT52 mode */
        PrivMode (0, PrivMode_vt52);
        break;
      case 'F':         /* use special graphics character set */
      case 'G':           /* use regular character set */
        /* unimplemented */
        break;
      case '=':         /* use alternate keypad mode */
      case '>':           /* use regular keypad mode */
        /* unimplemented */
        break;
    }
}
/*}}} */


/*{{{ process escape sequences */
void
rxvt_term::process_escape_seq ()
{
  unicode_t ch = cmd_getc ();

  if (PrivateModes & PrivMode_vt52)
    {
      process_escape_vt52 (ch);
      return;
    }

  switch (ch)
    {
        /* case 1:        do_tek_mode (); break; */
      case '#':
        if (cmd_getc () == '8')
          scr_E ();
        break;
      case '(':
        scr_charset_set (0, (unsigned int)cmd_getc ());
        break;
      case ')':
        scr_charset_set (1, (unsigned int)cmd_getc ());
        break;
      case '*':
        scr_charset_set (2, (unsigned int)cmd_getc ());
        break;
      case '+':
        scr_charset_set (3, (unsigned int)cmd_getc ());
        break;
#ifndef NO_FRILLS
      case '6':
        scr_backindex ();
        break;
#endif
      case '7':
        scr_cursor (SAVE);
        break;
      case '8':
        scr_cursor (RESTORE);
        break;
#ifndef NO_FRILLS
      case '9':
        scr_forwardindex ();
        break;
#endif
      case '=':
      case '>':
        PrivMode ((ch == '='), PrivMode_aplKP);
        break;

      case C1_40:
        cmd_getc ();
        break;
      case C1_44:
        scr_index (UP);
        break;

        /* 8.3.87: NEXT LINE */
      case C1_NEL:              /* ESC E */
        {
          unicode_t nlcr[] = { C0_LF, C0_CR };
          scr_add_lines (nlcr, 1, 2);
        }
        break;

        /* kidnapped escape sequence: Should be 8.3.48 */
      case C1_ESA:              /* ESC G */
        process_graphics ();
        break;

        /* 8.3.63: CHARACTER TABULATION SET */
      case C1_HTS:              /* ESC H */
        scr_set_tab (1);
        break;

        /* 8.3.105: REVERSE LINE FEED */
      case C1_RI:                       /* ESC M */
        scr_index (DN);
        break;

        /* 8.3.142: SINGLE-SHIFT TWO */
      /*case C1_SS2: scr_single_shift (2);   break; */

        /* 8.3.143: SINGLE-SHIFT THREE */
      /*case C1_SS3: scr_single_shift (3);   break; */

        /* 8.3.27: DEVICE CONTROL STRING */
      case C1_DCS:              /* ESC P */
        process_dcs_seq ();
        break;

        /* 8.3.110: SINGLE CHARACTER INTRODUCER */
      case C1_SCI:              /* ESC Z */
        tt_write ((const unsigned char *)ESCZ_ANSWER,
                 (unsigned int) (sizeof (ESCZ_ANSWER) - 1));
        break;                  /* steal obsolete ESC [ c */

        /* 8.3.16: CONTROL SEQUENCE INTRODUCER */
      case C1_CSI:              /* ESC [ */
        process_csi_seq ();
        break;

        /* 8.3.90: OPERATING SYSTEM COMMAND */
      case C1_OSC:              /* ESC ] */
        process_osc_seq ();
        break;

        /* 8.3.106: RESET TO INITIAL STATE */
      case 'c':
        mbstate.reset ();
        scr_poweron ();
        scrollbar_show (1);
        break;

        /* 8.3.79: LOCKING-SHIFT TWO (see ISO2022) */
      case 'n':
        scr_charset_choose (2);
        break;

        /* 8.3.81: LOCKING-SHIFT THREE (see ISO2022) */
      case 'o':
        scr_charset_choose (3);
        break;
    }
}
/*}}} */

/*{{{ process CONTROL SEQUENCE INTRODUCER (CSI) sequences `ESC[' */
/* *INDENT-OFF* */
enum {
  CSI_ICH = 0x40,
           CSI_CUU, CSI_CUD, CSI_CUF, CSI_CUB, CSI_CNL, CSI_CPL, CSI_CHA,
  CSI_CUP, CSI_CHT, CSI_ED , CSI_EL , CSI_IL , CSI_DL , CSI_EF , CSI_EA ,
  CSI_DCH, CSI_SEE, CSI_CPR, CSI_SU , CSI_SD , CSI_NP , CSI_PP , CSI_CTC,
  CSI_ECH, CSI_CVT, CSI_CBT, CSI_SRS, CSI_PTX, CSI_SDS, CSI_SIMD, CSI_5F,
  CSI_HPA, CSI_HPR, CSI_REP, CSI_DA , CSI_VPA, CSI_VPR, CSI_HVP, CSI_TBC,
  CSI_SM , CSI_MC , CSI_HPB, CSI_VPB, CSI_RM , CSI_SGR, CSI_DSR, CSI_DAQ,
  CSI_70 , CSI_71 , CSI_72 , CSI_73 , CSI_74 , CSI_75 , CSI_76 , CSI_77 ,
  CSI_78 , CSI_79 , CSI_7A , CSI_7B , CSI_7C , CSI_7D , CSI_7E , CSI_7F
};

#define make_byte(b7,b6,b5,b4,b3,b2,b1,b0)                      \
    (((b7) << 7) | ((b6) << 6) | ((b5) << 5) | ((b4) << 4)      \
     | ((b3) << 3) | ((b2) << 2) | ((b1) << 1) | (b0))
#define get_byte_array_bit(array, bit)                          \
    (!! ((array)[ (bit) / 8] & (128 >> ((bit) & 7))))

const unsigned char csi_defaults[] =
  {
    make_byte (1,1,1,1,1,1,1,1),        /* @, A, B, C, D, E, F, G, */
    make_byte (1,1,0,0,1,1,0,0),        /* H, I, J, K, L, M, N, O, */
    make_byte (1,0,1,1,1,1,1,0),        /* P, Q, R, S, T, U, V, W, */
    make_byte (1,1,1,0,0,0,1,0),        /* X, Y, Z, [, \, ], ^, _, */
    make_byte (1,1,1,0,1,1,1,0),        /* `, a, b, c, d, e, f, g, */
    make_byte (0,0,1,1,0,0,0,0),        /* h, i, j, k, l, m, n, o, */
    make_byte (0,0,0,0,0,0,0,0),        /* p, q, r, s, t, u, v, w, */
    make_byte (0,0,0,0,0,0,0,0),        /* x, y, z, {, |, }, ~,    */
  };
/* *INDENT-ON* */

void
rxvt_term::process_csi_seq ()
{
  unicode_t ch, priv, i;
  unsigned int nargs, p;
  int n, ndef;
  int arg[ESC_ARGS];

  for (nargs = ESC_ARGS; nargs > 0;)
    arg[--nargs] = 0;

  priv = 0;
  ch = cmd_getc ();
  if (ch >= '<' && ch <= '?')
    {   /* '<' '=' '>' '?' */
      priv = ch;
      ch = cmd_getc ();
    }

  /* read any numerical arguments */
  for (n = -1; ch < CSI_ICH; )
    {
      if (isdigit (ch))
        {
          if (n < 0)
            n = ch - '0';
          else
            n = n * 10 + ch - '0';
        }
      else if (ch == ';')
        {
          if (nargs < ESC_ARGS)
            arg[nargs++] = n;
          n = -1;
        }
      else if (IS_CONTROL (ch))
        process_nonprinting (ch);

      ch = cmd_getc ();
    }

  if (ch > CSI_7F)
    return;

  if (nargs < ESC_ARGS)
    arg[nargs++] = n;

  i = ch - CSI_ICH;
  ndef = get_byte_array_bit (csi_defaults, i);
  for (p = 0; p < nargs; p++)
    if (arg[p] == -1)
      arg[p] = ndef;

#ifdef DEBUG_CMD
  fprintf (stderr, "CSI ");
  for (p = 0; p < nargs; p++)
    fprintf (stderr, "%d%s", arg[p], p < nargs - 1 ? ";" : "");
  fprintf (stderr, "%c\n", ch);
#endif

  /*
   * private mode handling
   */
  if (priv)
    {
      switch (priv)
        {
          case '>':
            if (ch == CSI_DA)   /* secondary device attributes */
              tt_printf ("\033[>%d;%-.8s;0c", 'R', VSTRING);
            break;
          case '?':
            if (ch == 'h' || ch == 'l' || ch == 'r' || ch == 's' || ch == 't')
              process_terminal_mode (ch, priv, nargs, arg);
            break;
        }
      return;
    }

  switch (ch)
    {
        /*
         * ISO/IEC 6429:1992 (E) CSI sequences (defaults in parentheses)
         */
#ifdef PRINTPIPE
      case CSI_MC:              /* 8.3.83: (0) MEDIA COPY */
        switch (arg[0])
          {
            case 0:                     /* initiate transfer to primary aux device */
              scr_printscreen (0);
              break;
            case 5:                     /* start relay to primary aux device */
              process_print_pipe ();
              break;
          }
        break;
#endif

      case CSI_CUU:             /* 8.3.22: (1) CURSOR UP */
      case CSI_VPR:             /* 8.3.161: (1) LINE POSITION FORWARD */
        arg[0] = -arg[0];
        /* FALLTHROUGH */
      case CSI_CUD:             /* 8.3.19: (1) CURSOR DOWN */
      case CSI_VPB:             /* 8.3.160: (1) LINE POSITION BACKWARD */
        scr_gotorc (arg[0], 0, RELATIVE);
        break;

      case CSI_CUB:             /* 8.3.18: (1) CURSOR LEFT */
      case CSI_HPB:             /* 8.3.59: (1) CHARACTER POSITION BACKWARD */
#ifdef ISO6429
        arg[0] = -arg[0];
#else                           /* emulate common DEC VTs */
        arg[0] = arg[0] ? -arg[0] : -1;
#endif
        /* FALLTHROUGH */
      case CSI_CUF:             /* 8.3.20: (1) CURSOR RIGHT */
      case CSI_HPR:             /* 8.3.60: (1) CHARACTER POSITION FORWARD */
#ifdef ISO6429
        scr_gotorc (0, arg[0], RELATIVE);
#else                           /* emulate common DEC VTs */
        scr_gotorc (0, arg[0] ? arg[0] : 1, RELATIVE);
#endif
        break;

      case CSI_CPL:             /* 8.3.13: (1) CURSOR PRECEDING LINE */
        arg[0] = -arg[0];
        /* FALLTHROUGH */
      case CSI_CNL:             /* 8.3.12: (1) CURSOR NEXT LINE */
        scr_gotorc (arg[0], 0, R_RELATIVE);
        break;

      case CSI_CHA:             /* 8.3.9: (1) CURSOR CHARACTER ABSOLUTE */
      case CSI_HPA:             /* 8.3.58: (1) CURSOR POSITION ABSOLUTE */
        scr_gotorc (0, arg[0] - 1, R_RELATIVE);
        break;

      case CSI_VPA:             /* 8.3.159: (1) LINE POSITION ABSOLUTE */
        scr_gotorc (arg[0] - 1, 0, C_RELATIVE);
        break;

      case CSI_CUP:             /* 8.3.21: (1,1) CURSOR POSITION */
      case CSI_HVP:             /* 8.3.64: (1,1) CHARACTER AND LINE POSITION */
        scr_gotorc (arg[0] - 1, nargs < 2 ? 0 : (arg[1] - 1), 0);
        break;

      case CSI_CBT:             /* 8.3.7: (1) CURSOR BACKWARD TABULATION */
        arg[0] = -arg[0];
        /* FALLTHROUGH */
      case CSI_CHT:             /* 8.3.10: (1) CURSOR FORWARD TABULATION */
        scr_tab (arg[0]);
        break;

      case CSI_ED:              /* 8.3.40: (0) ERASE IN PAGE */
        scr_erase_screen (arg[0]);
        break;

      case CSI_EL:              /* 8.3.42: (0) ERASE IN LINE */
        scr_erase_line (arg[0]);
        break;

      case CSI_ICH:             /* 8.3.65: (1) INSERT CHARACTER */
        scr_insdel_chars (arg[0], INSERT);
        break;

      case CSI_IL:              /* 8.3.68: (1) INSERT LINE */
        scr_insdel_lines (arg[0], INSERT);
        break;

      case CSI_DL:              /* 8.3.33: (1) DELETE LINE */
        scr_insdel_lines (arg[0], DELETE);
        break;

      case CSI_ECH:             /* 8.3.39: (1) ERASE CHARACTER */
        scr_insdel_chars (arg[0], ERASE);
        break;

      case CSI_DCH:             /* 8.3.26: (1) DELETE CHARACTER */
        scr_insdel_chars (arg[0], DELETE);
        break;

      case CSI_SD:              /* 8.3.114: (1) SCROLL DOWN */
        arg[0] = -arg[0];
        /* FALLTHROUGH */
      case CSI_SU:              /* 8.3.148: (1) SCROLL UP */
        scr_scroll_text (screen.tscroll, screen.bscroll, arg[0], 0);
        break;

      case CSI_DA:              /* 8.3.24: (0) DEVICE ATTRIBUTES */
        tt_write ((const unsigned char *)VT100_ANS,
                 (unsigned int) (sizeof (VT100_ANS) - 1));
        break;

      case CSI_SGR:             /* 8.3.118: (0) SELECT GRAPHIC RENDITION */
        process_sgr_mode (nargs, arg);
        break;

      case CSI_DSR:             /* 8.3.36: (0) DEVICE STATUS REPORT */
        switch (arg[0])
          {
            case 5:                     /* DSR requested */
              tt_printf ("\033[0n");
              break;
            case 6:                     /* CPR requested */
              scr_report_position ();
              break;
            case 7:                     /* unofficial extension */
              if (Options & Opt_insecure)
                tt_printf ("%-.250s\n", rs[Rs_display_name]);
              break;
            case 8:                     /* unofficial extension */
              process_xterm_seq (XTerm_title, RESNAME "-" VERSION, CHAR_ST);
              break;
          }
        break;

      case CSI_TBC:             /* 8.3.155: (0) TABULATION CLEAR */
        switch (arg[0])
          {
            case 0:                     /* char tab stop cleared at active position */
              scr_set_tab (0);
              break;
              /* case 1: */             /* line tab stop cleared in active line */
              /* case 2: */             /* char tab stops cleared in active line */
            case 3:                     /* all char tab stops are cleared */
              /* case 4: */             /* all line tab stops are cleared */
            case 5:                     /* all tab stops are cleared */
              scr_set_tab (-1);
              break;
          }
        break;

      case CSI_CTC:             /* 8.3.17: (0) CURSOR TABULATION CONTROL */
        switch (arg[0])
          {
            case 0:                     /* char tab stop set at active position */
              scr_set_tab (1);
              break;            /* = ESC H */
              /* case 1: */             /* line tab stop set at active line */
            case 2:                     /* char tab stop cleared at active position */
              scr_set_tab (0);
              break;            /* = ESC [ 0 g */
              /* case 3: */             /* line tab stop cleared at active line */
              /* case 4: */             /* char tab stops cleared at active line */
            case 5:                     /* all char tab stops are cleared */
              scr_set_tab (-1);
              break;            /* = ESC [ 3 g */
              /* case 6: */             /* all line tab stops are cleared */
          }
        break;

      case CSI_RM:              /* 8.3.107: RESET MODE */
        if (arg[0] == 4)
          scr_insert_mode (0);
        break;

      case CSI_SM:              /* 8.3.126: SET MODE */
        if (arg[0] == 4)
          scr_insert_mode (1);
        break;

        /*
         * PRIVATE USE beyond this point.  All CSI_7? sequences here
         */
      case CSI_72:              /* DECSTBM: set top and bottom margins */
        if (nargs == 1)
          scr_scroll_region (arg[0] - 1, MAX_ROWS - 1);
        else if (nargs == 0 || arg[0] >= arg[1])
          scr_scroll_region (0, MAX_ROWS - 1);
        else
          scr_scroll_region (arg[0] - 1, arg[1] - 1);
        break;

      case CSI_73:
        scr_cursor (SAVE);
        break;
      case CSI_75:
        scr_cursor (RESTORE);
        break;

#ifndef NO_FRILLS
      case CSI_74:
        process_window_ops (arg, nargs);
        break;
#endif

      case CSI_78:              /* DECREQTPARM */
        if (arg[0] == 0 || arg[0] == 1)
          tt_printf ("\033[%d;1;1;128;128;1;0x", arg[0] + 2);
        break;

      default:
        break;
    }
}
/*}}} */

#ifndef NO_FRILLS
/* ARGSUSED */
void
rxvt_term::process_window_ops (const int *args, unsigned int nargs)
{
  int x, y;
  XWindowAttributes wattr;
  Window wdummy;

  if (nargs == 0)
    return;

  switch (args[0])
    {
      /*
       * commands
       */
      case 1:                   /* deiconify window */
        XMapWindow (display->display, TermWin.parent[0]);
        break;
      case 2:                   /* iconify window */
        XIconifyWindow (display->display, TermWin.parent[0],
                       DefaultScreen (display->display));
        break;
      case 3:                   /* set position (pixels) */
        XMoveWindow (display->display, TermWin.parent[0], args[1], args[2]);
        break;
      case 4:                   /* set size (pixels) */
        set_widthheight ((unsigned int)args[2], (unsigned int)args[1]);
        break;
      case 5:                   /* raise window */
        XRaiseWindow (display->display, TermWin.parent[0]);
        break;
      case 6:                   /* lower window */
        XLowerWindow (display->display, TermWin.parent[0]);
        break;
      case 7:                   /* refresh window */
        scr_touch (true);
        break;
      case 8:                   /* set size (chars) */
        set_widthheight ((unsigned int) (args[2] * TermWin.fwidth),
                         (unsigned int) (args[1] * TermWin.fheight));
        break;

      //case 9: NYI, TODO, restore maximized window or maximize window
      default:
        if (args[0] >= 24)      /* set height (chars) */
          set_widthheight ((unsigned int)TermWin.width,
                           (unsigned int) (args[1] * TermWin.fheight));
        break;


      /*
       * reports - some output format copied from XTerm
       */
      case 11:                  /* report window state */
        XGetWindowAttributes (display->display, TermWin.parent[0], &wattr);
        tt_printf ("\033[%dt", wattr.map_state == IsViewable ? 1 : 2);
        break;
      case 13:                  /* report window position */
        XGetWindowAttributes (display->display, TermWin.parent[0], &wattr);
        XTranslateCoordinates (display->display, TermWin.parent[0], wattr.root,
                               -wattr.border_width, -wattr.border_width,
                               &x, &y, &wdummy);
        tt_printf ("\033[3;%d;%dt", x, y);
        break;
      case 14:                  /* report window size (pixels) */
        XGetWindowAttributes (display->display, TermWin.parent[0], &wattr);
        tt_printf ("\033[4;%d;%dt", wattr.height, wattr.width);
        break;
      case 18:                  /* report text area size (chars) */
        tt_printf ("\033[8;%d;%dt", TermWin.nrow, TermWin.ncol);
        break;
      case 19:                  /* report window size (chars) */
        tt_printf ("\033[9;%d;%dt", TermWin.nrow, TermWin.ncol);
        break;
      case 20:                  /* report icon label */
        {
          char *s;
          XGetIconName (display->display, TermWin.parent[0], &s);
          tt_printf ("\033]L%-.250s\234", (Options & Opt_insecure) && s ? s : "");      /* 8bit ST */
          XFree (s);
        }
        break;
      case 21:                  /* report window title */
        {
          char *s;
          XFetchName (display->display, TermWin.parent[0], &s);
          tt_printf ("\033]l%-.250s\234", (Options & Opt_insecure) && s ? s : "");      /* 8bit ST */
          XFree (s);
        }
        break;
    }
}
#endif

/*----------------------------------------------------------------------*/
/*
 * get input up until STRING TERMINATOR (or BEL)
 * ends_how is terminator used. returned input must be free()'d
 */
unsigned char *
rxvt_term::get_to_st (unicode_t &ends_how)
{
  unicode_t prev = 0, ch;
  unsigned int n = 0;
  unsigned char *s;
  unsigned char string[STRING_MAX];

  while ((ch = cmd_getc ()) != NOCHAR)
    {
      if (prev == C0_ESC)
        {
          if (ch == 0x5c)       /* 7bit ST */
            break;
          else
            return NULL;
        }
      else if (ch == C0_BEL || ch == CHAR_ST)
        break;
      else if (ch < 0x20)
        return NULL;    /* other control character - exit */

      if (n >= sizeof (string) - 1)
        // stop at some sane length
        return NULL;

      if (ch == C0_SYN)
        {
          string[n++] = cmd_get8 ();
          prev = 0;
        }
      else
        string[n++] = prev = ch;
    }

  string[n++] = '\0';

  if ((s = (unsigned char *)rxvt_malloc (n)) == NULL)
    return NULL;

  ends_how = (ch == 0x5c ? C0_ESC : ch);
  STRNCPY (s, string, n);
  return s;
}

/*----------------------------------------------------------------------*/
/*
 * process DEVICE CONTROL STRING `ESC P ... (ST|BEL)' or `0x90 ... (ST|BEL)'
 */
void
rxvt_term::process_dcs_seq ()
{
  unsigned char *s;
  unicode_t eh;

  /*
   * Not handled yet
   */
  s = get_to_st (eh);
  if (s)
    free (s);

  return;
}

/*----------------------------------------------------------------------*/
/*
 * process OPERATING SYSTEM COMMAND sequence `ESC ] Ps ; Pt (ST|BEL)'
 */
void
rxvt_term::process_osc_seq ()
{
  unicode_t ch, eh;
  int arg;

  ch = cmd_getc ();
  for (arg = 0; isdigit (ch); ch = cmd_getc ())
    arg = arg * 10 + (ch - '0');

  if (ch == ';')
    {
      unsigned char *s = get_to_st (eh);

      if (s)
        {
          process_xterm_seq (arg, (char *)s, eh);
          free (s);
        }
    }
}

void
rxvt_term::process_color_seq (int report, int color, const char *str, unsigned char resp)
{
  if (str[0] == '?' && !str[1])
    {
      unsigned short r, g, b;
      PixColorsFocused[color].get (display, r, g, b);
      tt_printf ("\033]%d;rgb:%04x/%04x/%04x%c", report, r, g, b, resp);
    }
  else
    set_window_color (color, str);
}

/*
 * XTerm escape sequences: ESC ] Ps;Pt (ST|BEL)
 *       0 = change iconName/title
 *       1 = change iconName
 *       2 = change title
 *       4 = change color
 *      10 = change fg color
 *      11 = change bg color
 *      12 = change text color
 *      13 = change mouse foreground color 
 *      17 = change highlight character colour
 *      18 = change bold character color
 *      19 = change underlined character color 
 *      46 = change logfile (not implemented)
 *      50 = change font
 *
 * rxvt extensions:
 *      20 = bg pixmap
 *      39 = change default fg color
 *      49 = change default bg color
 *      55 = dump scrollback buffer and all of screen
 *     701 = change locale
 *     702 = find font
 *     703 = menu
 */
void
rxvt_term::process_xterm_seq (int op, const char *str, unsigned char resp)
{
  int changed = 0;
  int color;
  char *buf, *name;
  bool query = str[0] == '?' && !str[1];

  assert (str != NULL);
  switch (op)
    {
      case XTerm_name:
        set_title (str);
        /* FALLTHROUGH */
      case XTerm_iconName:
        set_icon_name (str);
        break;
      case XTerm_title:
        set_title (str);
        break;
      case XTerm_property:
        if (str[0] == '?')
          {
            Atom prop = XInternAtom (display->display, str + 1, True);
            Atom actual_type;
            int actual_format;
            unsigned long nitems;
            unsigned long bytes_after;
            unsigned char *value = 0;
            const char *str = "";

            if (prop
                && XGetWindowProperty (display->display, TermWin.parent[0],
                                       prop, 0, 1<<16, 0, AnyPropertyType,
                                       &actual_type, &actual_format,
                                       &nitems, &bytes_after, &value) == Success
                && actual_type != None
                && actual_format == 8)
              str = (const char *)(value);

            tt_printf ("\033]%d;%s%c", XTerm_property, str, resp);

            XFree (value);
          }
        else
          {
            char *eq = strchr (str, '='); // constness lost, but verified to be ok

            if (eq)
              {
                *eq = 0;
                XChangeProperty (display->display, TermWin.parent[0],
                                 display->atom (str), XA_STRING, 8,
                                 PropModeReplace, (unsigned char *)eq + 1,
                                 strlen (eq + 1));
              }
            else
              XDeleteProperty (display->display, TermWin.parent[0],
                               display->atom (str));
          }
        break;

      case XTerm_Color:
        for (buf = (char *)str; buf && *buf;)
          {
            if ((name = STRCHR (buf, ';')) == NULL)
              break;

            *name++ = '\0';
            color = atoi (buf);

            if (color < 0 || color >= TOTAL_COLORS)
              break;

            if ((buf = STRCHR (name, ';')) != NULL)
              *buf++ = '\0';

            if (name[0] == '?' && !name[1])
              {
                unsigned short r, g, b;
                PixColorsFocused[color + minCOLOR].get (display, r, g, b);
                tt_printf ("\033]%d;%d;rgb:%04x/%04x/%04x%c", XTerm_Color, color, r, g, b, resp);
              }
            else
              set_window_color (color + minCOLOR, name);
          }
        break;
      case XTerm_Color00:
        process_color_seq (XTerm_Color00, Color_fg, str, resp);
        break;
      case XTerm_Color01:
        process_color_seq (XTerm_Color00, Color_bg, str, resp);
        break;
#ifndef NO_CURSORCOLOR
      case XTerm_Color_cursor:
        process_color_seq (XTerm_Color_cursor, Color_cursor, str, resp);
        break;
#endif
      case XTerm_Color_pointer_fg:
        process_color_seq (XTerm_Color_pointer_fg, Color_pointer_fg, str, resp);
        break;
      case XTerm_Color_pointer_bg:
        process_color_seq (XTerm_Color_pointer_bg, Color_pointer_bg, str, resp);
        break;
#ifndef NO_BOLD_UNDERLINE_REVERSE
      case XTerm_Color_BD:
        process_color_seq (XTerm_Color_BD, Color_BD, str, resp);
        break;
      case XTerm_Color_UL:
        process_color_seq (XTerm_Color_UL, Color_UL, str, resp);
        break;
      case XTerm_Color_RV:
        process_color_seq (XTerm_Color_RV, Color_RV, str, resp);
        break;
#endif

      case XTerm_Pixmap:
        if (*str != ';')
          {
#if XPM_BACKGROUND
            scale_pixmap ("");  /* reset to default scaling */
            set_bgPixmap (str); /* change pixmap */
#endif
            scr_touch (true);
          }
        while ((str = STRCHR (str, ';')) != NULL)
          {
            str++;
#if XPM_BACKGROUND
            changed += scale_pixmap (str);
#endif

          }
        if (changed)
          {
#ifdef XPM_BACKGROUND
            resize_pixmap ();
#endif
            scr_touch (true);
          }
        break;

      case XTerm_restoreFG:
        set_window_color (Color_fg, str);
        break;
      case XTerm_restoreBG:
        set_window_color (Color_bg, str);
        break;

      case XTerm_logfile:
        // TODO, when secure mode?
        break;

      case XTerm_font:
        if (query)
          tt_printf ("\33]%d;%-.250s%c", XTerm_font,
                     (Options & Opt_insecure) && TermWin.fontset->fontdesc
                       ? TermWin.fontset->fontdesc : "",
                     resp);
        else
          change_font (str);
        break;

#ifndef NO_FRILLS
      case XTerm_locale:
        if (query)
          tt_printf ("\33]%d;%-.250s%c", XTerm_locale, (Options & Opt_insecure) ? locale : "", resp);
        else
          {
            set_locale (str);
# ifdef USE_XIM
            im_cb ();
# endif
          }
        break;

      case XTerm_findfont:
        {
          int fid = TermWin.fontset->find_font (atoi (str));
          tt_printf ("\33]%d;%d;%-.250s%c", XTerm_findfont,
                     fid,
                     (Options & Opt_insecure) ? (*TermWin.fontset)[fid]->name : "",
                     resp);
        }
        break;
#endif

#ifdef MENUBAR
     case XTerm_Menu:
       if (Options & Opt_insecure)
         menubar_dispatch (const_cast<char *>(str)); // casting away constness is checked
       break;
#endif
#if 0
      case XTerm_dumpscreen:    /* no error notices */
        {
          int fd;
          if ((fd = open (str, O_RDWR | O_CREAT | O_EXCL, 0600)) >= 0)
            {
              scr_dump (fd);
              close (fd);
            }
        }
        break;
#endif
    }
}
/*----------------------------------------------------------------------*/

/*{{{ process DEC private mode sequences `ESC [ ? Ps mode' */
/*
 * mode can only have the following values:
 *      'l' = low
 *      'h' = high
 *      's' = save
 *      'r' = restore
 *      't' = toggle
 * so no need for fancy checking
 */
int
rxvt_term::privcases (int mode, unsigned long bit)
{
  int state;

  if (mode == 's')
    {
      SavedModes |= (PrivateModes & bit);
      return -1;
    }
  else
    {
      if (mode == 'r')
        state = (SavedModes & bit) ? 1 : 0;     /* no overlapping */
      else
        state = (mode == 't') ? ! (PrivateModes & bit) : mode;
      PrivMode (state, bit);
    }

  return state;
}

/* we're not using priv _yet_ */
void
rxvt_term::process_terminal_mode (int mode, int priv __attribute__ ((unused)), unsigned int nargs, const int *arg)
{
  unsigned int i, j;
  int state;

  static const struct
    {
      const int       argval;
      const unsigned long bit;
    }

  argtopriv[] = {
                  { 1, PrivMode_aplCUR },
                  { 2, PrivMode_vt52 },
                  { 3, PrivMode_132 },
                  { 4, PrivMode_smoothScroll },
                  { 5, PrivMode_rVideo },
                  { 6, PrivMode_relOrigin },
                  { 7, PrivMode_Autowrap },
                  { 9, PrivMode_MouseX10 },
#ifdef menuBar_esc
                  { menuBar_esc, PrivMode_menuBar },
#endif
#ifdef scrollBar_esc
                  { scrollBar_esc, PrivMode_scrollBar },
#endif
                 // 18, 19 printing-related
                  { 25, PrivMode_VisibleCursor },
                 // 30 show scrollbar rxvt. extension
                  { 35, PrivMode_ShiftKeys }, // rxvt extension
                  { 40, PrivMode_132OK },
                 // 41 xterm more fixes NYI
                 // 45 margin bell NYI
                 // 46 start logging
                  { 47, PrivMode_Screen },
                  { 66, PrivMode_aplKP },
#ifndef NO_BACKSPACE_KEY
                  { 67, PrivMode_BackSpace },
#endif
                  { 1000, PrivMode_MouseX11 },
                 // 1001 Use Hilite Mouse Tracking. NYI, TODO
                 // 1002 Use Cell Motion Mouse Tracking. NYI, TODO
                 // 1003 Use All Motion Mouse Tracking. NYI, TODO
                  { 1010, PrivMode_TtyOutputInh }, // rxvt extension
                  { 1011, PrivMode_Keypress }, // rxvt extension
                 // 1035 enable modifiers for alt, numlock NYI
                 // 1036 send ESC for meta keys NYI
                 // 1037 send DEL for keypad delete NYI
                  { 1047, PrivMode_Screen },
                 // 1048 save and restore cursor
                  { 1049, PrivMode_Screen }, /* xterm extension, clear screen on ti rather than te */
                 // 1051, 1052, 1060, 1061 keyboard emulation NYI
                };

  if (nargs == 0)
    return;

  /* make lo/hi boolean */
  if (mode == 'l')
    mode = 0;           /* reset */
  else if (mode == 'h')
    mode = 1;           /* set */

  for (i = 0; i < nargs; i++)
    {
      state = -1;

      /* basic handling */
      for (j = 0; j < (sizeof (argtopriv)/sizeof (argtopriv[0])); j++)
        if (argtopriv[j].argval == arg[i])
          {
            state = privcases (mode, argtopriv[j].bit);
            break;
          }

      /* extra handling for values with state unkept  */
      switch (arg[i])
        {
          case 1048:            /* alternative cursor save */
            if (Options & Opt_secondaryScreen)
              if (mode == 0)
                scr_cursor (RESTORE);
              else if (mode == 1)
                scr_cursor (SAVE);
            break;
        }

      if (state >= 0)
        /* extra handling for values with valid 0 or 1 state */
        switch (arg[i])
          {
              /* case 1:        - application cursor keys */
            case 2:                     /* VT52 mode */
              /* oddball mode.  should be set regardless of set/reset
               * parameter.  Return from VT52 mode with an ESC < from
               * within VT52 mode
               */
              PrivMode (1, PrivMode_vt52);
              break;
            case 3:                     /* 80/132 */
              if (PrivateModes & PrivMode_132OK)
                set_widthheight (((state ? 132 : 80) * TermWin.fwidth), TermWin.height);
              break;
            case 4:                     /* smooth scrolling */
              if (state)
                Options &= ~Opt_jumpScroll;
              else
                Options |= Opt_jumpScroll;
              break;
            case 5:                     /* reverse video */
              scr_rvideo_mode (state);
              break;
            case 6:                     /* relative/absolute origins  */
              scr_relative_origin (state);
              break;
            case 7:                     /* autowrap */
              scr_autowrap (state);
              break;
            /* case 8:  - auto repeat, can't do on a per window basis */
            case 9:                     /* X10 mouse reporting */
              if (state)                /* orthogonal */
                PrivateModes &= ~PrivMode_MouseX11;
              break;
#ifdef menuBar_esc
            case menuBar_esc:
#ifdef MENUBAR
              map_menuBar (state);
#endif
              break;
#endif
#ifdef scrollBar_esc
            case scrollBar_esc:
              if (scrollbar_mapping (state))
                {
                  resize_all_windows (0, 0, 0);
                  scr_touch (true);
                }
              break;
#endif
            case 25:            /* visible/invisible cursor */
              scr_cursor_visible (state);
              break;
            /* case 35: - shift keys */
            /* case 40: - 80 <--> 132 mode */
            case 47:            /* secondary screen */
              scr_change_screen (state);
              break;
            /* case 66: - application key pad */
            /* case 67: - backspace key */
            case 1000:          /* X11 mouse reporting */
              if (state)                /* orthogonal */
                PrivateModes &= ~PrivMode_MouseX10;
              break;
#if 0
            case 1001:
              break;            /* X11 mouse highlighting */
#endif
            case 1010:          /* scroll to bottom on TTY output inhibit */
              if (state)
                Options &= ~Opt_scrollTtyOutput;
              else
                Options |= Opt_scrollTtyOutput;
              break;
            case 1011:          /* scroll to bottom on key press */
              if (state)
                Options |= Opt_scrollTtyKeypress;
              else
                Options &= ~Opt_scrollTtyKeypress;
              break;
            case 1047:          /* secondary screen w/ clearing last */
              if (Options & Opt_secondaryScreen)
                if (current_screen != PRIMARY)
                  scr_erase_screen (2);
              scr_change_screen (state);
              break;
            case 1049:          /* secondary screen w/ clearing first */
              scr_change_screen (state);
              if (Options & Opt_secondaryScreen)
                if (current_screen != PRIMARY)
                  scr_erase_screen (2);
              break;
            default:
              break;
          }
    }
}
/*}}} */

/*{{{ process sgr sequences */
void
rxvt_term::process_sgr_mode (unsigned int nargs, const int *arg)
{
  unsigned int i;
  short rendset;
  int rendstyle;

  if (nargs == 0)
    {
      scr_rendition (0, ~RS_None);
      return;
    }

  for (i = 0; i < nargs; i++)
    {
      rendset = -1;
      switch (arg[i])
        {
          case 0:
            rendset = 0, rendstyle = ~RS_None;
            break;
          case 1:
            rendset = 1, rendstyle = RS_Bold;
            break;
          //case 2: // faint or second colour
          case 4:
            rendset = 1, rendstyle = RS_Uline;
            break;
          case 5: // slowly blinking
          case 6: // rapidly blinking
            rendset = 1, rendstyle = RS_Blink;
            break;
          //case 6: // scoansi light background
          case 7:
            rendset = 1, rendstyle = RS_RVid;
            break;
          case 8:
            // invisible. NYI
            break;
          //case 9: // crossed out
          //case 10: // scoansi acs off, primary font
          //case 11: // scoansi acs on, first alt font
          //case 12: // scoansi acs on, |0x80, second alt font
          //...
          //case 19: // ninth alt font
          //case 20: // gothic
          case 21: // disable bold, faint
            rendset = 0, rendstyle = RS_Bold;
            break;
          case 22:
            rendset = 0, rendstyle = RS_Bold;
            break;
          //case 23: disable italic
          case 24:
            rendset = 0, rendstyle = RS_Uline;
            break;
          case 25:
            rendset = 0, rendstyle = RS_Blink;
            break;
          case 27:
            rendset = 0, rendstyle = RS_RVid;
            break;
          //case 28: // visible. NYI
          //case 29: // not crossed-out
        }

      if (rendset != -1)
        {
          scr_rendition (rendset, rendstyle);
          continue;             /* for (;i;) */
        }

      switch (arg[i])
        {
          case 30:
          case 31:              /* set fg color */
          case 32:
          case 33:
          case 34:
          case 35:
          case 36:
          case 37:
            scr_color ((unsigned int) (minCOLOR + (arg[i] - 30)), Color_fg);
            break;
#ifdef TTY_256COLOR
          case 38:
            if (nargs > i + 2 && arg[i + 1] == 5)
              {
                scr_color ((unsigned int) (minCOLOR + arg[i + 2]), Color_fg);
                i += 2;
              }
            break;
#endif
          case 39:              /* default fg */
            scr_color (Color_fg, Color_fg);
            break;

          case 40:
          case 41:              /* set bg color */
          case 42:
          case 43:
          case 44:
          case 45:
          case 46:
          case 47:
            scr_color ((unsigned int) (minCOLOR + (arg[i] - 40)), Color_bg);
            break;
#ifdef TTY_256COLOR
          case 48:
            if (nargs > i + 2 && arg[i + 1] == 5)
              {
                scr_color ((unsigned int) (minCOLOR + arg[i + 2]), Color_bg);
                i += 2;
              }
            break;
#endif
          case 49:              /* default bg */
            scr_color (Color_bg, Color_bg);
            break;

#ifndef NO_BRIGHTCOLOR
          case 90:
          case 91:              /* set bright fg color */
          case 92:
          case 93:
          case 94:
          case 95:
          case 96:
          case 97:
            scr_color ((unsigned int) (minBrightCOLOR + (arg[i] - 90)),
                       Color_fg);
            break;
          case 100:
          case 101:             /* set bright bg color */
          case 102:
          case 103:
          case 104:
          case 105:
          case 106:
          case 107:
            scr_color ((unsigned int) (minBrightCOLOR + (arg[i] - 100)),
                       Color_bg);
            break;
#endif

        }
    }
}
/*}}} */

/*{{{ (do not) process Rob Nation's own graphics mode sequences */
void
rxvt_term::process_graphics ()
{
  unicode_t ch, cmd = cmd_getc ();

  if (cmd == 'Q')
    {           /* query graphics */
      tt_printf ("\033G0\n");   /* no graphics */
      return;
    }
  /* swallow other graphics sequences until terminating ':' */
  do
    ch = cmd_getc ();
  while (ch != ':');
}
/*}}} */

/* ------------------------------------------------------------------------- */

/*
 * Send printf () formatted output to the command.
 * Only use for small amounts of data.
 */
void
rxvt_term::tt_printf (const char *fmt,...)
{
  va_list arg_ptr;
  unsigned char buf[256];

  va_start (arg_ptr, fmt);
  vsnprintf ((char *)buf, 256, fmt, arg_ptr);
  va_end (arg_ptr);
  tt_write (buf, STRLEN (buf));
}

/* ---------------------------------------------------------------------- */
/* Write data to the pty as typed by the user, pasted with the mouse,
 * or generated by us in response to a query ESC sequence.
 */
void
rxvt_term::tt_write (const unsigned char *data, unsigned int len)
{
  enum { MAX_PTY_WRITE = 255 }; // minimum MAX_INPUT

  if (len)
    {
      if (v_buflen == 0)
        {
          ssize_t written = write (cmd_fd, data, min (MAX_PTY_WRITE, len));

          if ((unsigned int)written == len)
            return;

          data += written;
          len -= written;
        }


      v_buffer = (unsigned char *)realloc (v_buffer, v_buflen + len);

      memcpy (v_buffer + v_buflen, data, len);
      v_buflen += len;
    }

  for (;;)
    {
      int written = write (cmd_fd, v_buffer, min (MAX_PTY_WRITE, v_buflen));

      if (written > 0)
        {
          v_buflen -= written;

          if (v_buflen == 0)
            {
              free (v_buffer);
              v_buffer = 0;
              v_buflen = 0;

              pty_ev.set (EVENT_READ);
              return;
            }

          memmove (v_buffer, v_buffer + written, v_buflen);
        }
      else if (written != -1 || (errno != EAGAIN && errno != EINTR))
        // original code just ignores this...
        destroy ();
      else
        {
          pty_ev.set (EVENT_READ | EVENT_WRITE);
          return;
        }
    }
}

/*----------------------- end-of-file (C source) -----------------------*/

Revision:	1.131
Committed:	Fri Aug 13 22:38:57 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-3_6
Changes since 1.120:	+233 -74 lines
Log Message:	* empty log message *