ncurses/lib_window.c

   1 /****************************************************************************
   2  * Copyright (c) 1998 Free Software Foundation, Inc.                        *
   3  *                                                                          *
   4  * Permission is hereby granted, free of charge, to any person obtaining a  *
   5  * copy of this software and associated documentation files (the            *
   6  * "Software"), to deal in the Software without restriction, including      *
   7  * without limitation the rights to use, copy, modify, merge, publish,      *
   8  * distribute, distribute with modifications, sublicense, and/or sell       *
   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  22  *                                                                          *
  23  * Except as contained in this notice, the name(s) of the above copyright   *
  24  * holders shall not be used in advertising or otherwise to promote the     *
  25  * sale, use or other dealings in this Software without prior written       *
  26  * authorization.                                                           *
  27  ****************************************************************************/
  28
  29 /****************************************************************************
  30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  32  ****************************************************************************/
  33
  34 /*
  35 **      lib_window.c
  36 **
  37 **
  38 */
  39
  40 #include <curses.priv.h>
  41
  42 MODULE_ID("$Id: lib_window.c,v 1.11 1998/02/11 12:13:53 tom Exp $")
  43
  44 void _nc_synchook(WINDOW *win)
  45 /* hook to be called after each window change */
  46 {
  47         if (win->_immed) wrefresh(win);
  48         if (win->_sync) wsyncup(win);
  49 }
  50
  51 int mvderwin(WINDOW *win, int y, int x)
  52 /* move a derived window */
  53 {
  54    WINDOW *orig;
  55    int i;
  56
  57    T((T_CALLED("mvderwin(%p,%d,%d)"), win, y, x));
  58
  59    if (win && (orig = win->_parent))
  60    {
  61       if (win->_parx==x && win->_pary==y)
  62         returnCode(OK);
  63       if (x<0 || y<0)
  64         returnCode(ERR);
  65       if ( (x+getmaxx(win) > getmaxx(orig)) ||
  66            (y+getmaxy(win) > getmaxy(orig)) )
  67         returnCode(ERR);
  68    }
  69    else
  70       returnCode(ERR);
  71    wsyncup(win);
  72    win->_parx = x;
  73    win->_pary = y;
  74    for(i=0;i<getmaxy(win);i++)
  75      win->_line[i].text = &(orig->_line[y++].text[x]);
  76    returnCode(OK);
  77 }
  78
  79 int syncok(WINDOW *win, bool bf)
  80 /* enable/disable automatic wsyncup() on each change to window */
  81 {
  82         T((T_CALLED("syncok(%p,%d)"), win, bf));
  83
  84         if (win) {
  85                 win->_sync = bf;
  86                 returnCode(OK);
  87         } else
  88                 returnCode(ERR);
  89 }
  90
  91 void wsyncup(WINDOW *win)
  92 /* mark changed every cell in win's ancestors that is changed in win */
  93 /* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...)      */
  94 {
  95   WINDOW        *wp;
  96
  97   if (win && win->_parent)
  98     for (wp = win; wp->_parent; wp = wp->_parent)
  99       {
 100         int y;
 101         WINDOW *pp = wp->_parent;
 102
 103         assert((wp->_pary <= pp->_maxy) &&
 104                ((wp->_pary+wp->_maxy) <= pp->_maxy));
 105
 106         for (y = 0; y <= wp->_maxy; y++)
 107           {
 108             int left = wp->_line[y].firstchar;
 109             if (left >= 0) /* line is touched */
 110               {
 111                 /* left & right character in parent window coordinates */
 112                 int right = wp->_line[y].lastchar + wp->_parx;
 113                 left += wp->_parx;
 114
 115                 if (pp->_line[wp->_pary + y].firstchar == _NOCHANGE)
 116                   {
 117                     pp->_line[wp->_pary + y].firstchar = left;
 118                     pp->_line[wp->_pary + y].lastchar  = right;
 119                   }
 120                 else
 121                   {
 122                     if (left < pp->_line[wp->_pary + y].firstchar)
 123                       pp->_line[wp->_pary + y].firstchar = left;
 124                     if (pp->_line[wp->_pary + y].lastchar < right)
 125                       pp->_line[wp->_pary + y].lastchar = right;
 126                   }
 127               }
 128           }
 129       }
 130 }
 131
 132 void wsyncdown(WINDOW *win)
 133 /* mark changed every cell in win that is changed in any of its ancestors */
 134 /* Rewritten by J. Pfeifer, 1-Apr-96 (don't even think that...)           */
 135 {
 136   if (win && win->_parent)
 137     {
 138       WINDOW *pp = win->_parent;
 139       int y;
 140
 141       /* This recursion guarantees, that the changes are propagated down-
 142          wards from the root to our direct parent. */
 143       wsyncdown(pp);
 144
 145       /* and now we only have to propagate the changes from our direct
 146          parent, if there are any. */
 147       assert((win->_pary <= pp->_maxy) &&
 148              ((win->_pary + win->_maxy) <= pp->_maxy));
 149
 150       for (y = 0; y <= win->_maxy; y++)
 151         {
 152           if (pp->_line[win->_pary + y].firstchar >= 0) /* parent changed */
 153             {
 154               /* left and right character in child coordinates */
 155               int left  = pp->_line[win->_pary + y].firstchar - win->_parx;
 156               int right = pp->_line[win->_pary + y].lastchar  - win->_parx;
 157               /* The change maybe outside the childs range */
 158               if (left<0)
 159                 left = 0;
 160               if (right > win->_maxx)
 161                 right = win->_maxx;
 162               if (win->_line[y].firstchar == _NOCHANGE)
 163                 {
 164                   win->_line[y].firstchar = left;
 165                   win->_line[y].lastchar  = right;
 166                 }
 167               else
 168                 {
 169                   if (left < win->_line[y].firstchar)
 170                     win->_line[y].firstchar = left;
 171                   if (win->_line[y].lastchar < right)
 172                     win->_line[y].lastchar = right;
 173                 }
 174             }
 175         }
 176     }
 177 }
 178
 179 void wcursyncup(WINDOW *win)
 180 /* sync the cursor in all derived windows to its value in the base window */
 181 {
 182    WINDOW *wp;
 183    for( wp = win; wp && wp->_parent; wp = wp->_parent ) {
 184       wmove( wp->_parent, wp->_pary + wp->_cury, wp->_parx + wp->_curx );
 185    }
 186 }
 187
 188 WINDOW *dupwin(WINDOW *win)
 189 /* make an exact duplicate of the given window */
 190 {
 191 WINDOW *nwin;
 192 size_t linesize;
 193 int i;
 194
 195         T((T_CALLED("dupwin(%p)"), win));
 196
 197         if ((win==NULL) ||
 198             ((nwin = newwin(win->_maxy + 1, win->_maxx + 1, win->_begy, win->_begx)) == NULL))
 199           returnWin(0);
 200
 201         nwin->_curx        = win->_curx;
 202         nwin->_cury        = win->_cury;
 203         nwin->_maxy        = win->_maxy;
 204         nwin->_maxx        = win->_maxx;
 205         nwin->_begy        = win->_begy;
 206         nwin->_begx        = win->_begx;
 207         nwin->_yoffset     = win->_yoffset;
 208
 209         nwin->_flags       = win->_flags & ~_SUBWIN;
 210         /* Due to the use of newwin(), the clone is not a subwindow.
 211          * The text is really copied into the clone.
 212          */
 213
 214         nwin->_attrs       = win->_attrs;
 215         nwin->_bkgd        = win->_bkgd;
 216
 217         nwin->_clear       = win->_clear;
 218         nwin->_scroll      = win->_scroll;
 219         nwin->_leaveok     = win->_leaveok;
 220         nwin->_use_keypad  = win->_use_keypad;
 221         nwin->_delay       = win->_delay;
 222         nwin->_immed       = win->_immed;
 223         nwin->_sync        = win->_sync;
 224
 225         nwin->_parx        = 0;
 226         nwin->_pary        = 0;
 227         nwin->_parent      = (WINDOW*)0;
 228         /* See above: the clone isn't a subwindow! */
 229
 230         nwin->_regtop      = win->_regtop;
 231         nwin->_regbottom   = win->_regbottom;
 232
 233         linesize = (win->_maxx + 1) * sizeof(chtype);
 234         for (i = 0; i <= nwin->_maxy; i++) {
 235                 memcpy(nwin->_line[i].text, win->_line[i].text, linesize);
 236                 nwin->_line[i].firstchar  = win->_line[i].firstchar;
 237                 nwin->_line[i].lastchar = win->_line[i].lastchar;
 238         }
 239
 240         returnWin(nwin);
 241 }