ncurses/base/lib_bkgd.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2011,2012 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  *     and: Juergen Pfeifer                         1997                    *
  33  *     and: Sven Verdoolaege                        2000                    *
  34  *     and: Thomas E. Dickey                        1996-on                 *
  35  ****************************************************************************/
  36
  37 #include <curses.priv.h>
  38
  39 MODULE_ID("$Id: lib_bkgd.c,v 1.48 2012/12/09 01:01:19 tom Exp $")
  40
  41 /*
  42  * Set the window's background information.
  43  */
  44 #if USE_WIDEC_SUPPORT
  45 NCURSES_EXPORT(void)
  46 #else
  47 static NCURSES_INLINE void
  48 #endif
  49 wbkgrndset(WINDOW *win, const ARG_CH_T ch)
  50 {
  51     T((T_CALLED("wbkgdset(%p,%s)"), (void *) win, _tracech_t(ch)));
  52
  53     if (win) {
  54         attr_t off = AttrOf(win->_nc_bkgd);
  55         attr_t on = AttrOf(CHDEREF(ch));
  56
  57         toggle_attr_off(WINDOW_ATTRS(win), off);
  58         toggle_attr_on(WINDOW_ATTRS(win), on);
  59
  60 #if NCURSES_EXT_COLORS
  61         {
  62             int pair;
  63
  64             if ((pair = GetPair(win->_nc_bkgd)) != 0)
  65                 SET_WINDOW_PAIR(win, 0);
  66             if ((pair = GetPair(CHDEREF(ch))) != 0)
  67                 SET_WINDOW_PAIR(win, pair);
  68         }
  69 #endif
  70
  71         if (CharOf(CHDEREF(ch)) == L('\0')) {
  72             SetChar(win->_nc_bkgd, BLANK_TEXT, AttrOf(CHDEREF(ch)));
  73             if_EXT_COLORS(SetPair(win->_nc_bkgd, GetPair(CHDEREF(ch))));
  74         } else {
  75             win->_nc_bkgd = CHDEREF(ch);
  76         }
  77 #if USE_WIDEC_SUPPORT
  78         /*
  79          * If we're compiled for wide-character support, _bkgrnd is the
  80          * preferred location for the background information since it stores
  81          * more than _bkgd.  Update _bkgd each time we modify _bkgrnd, so the
  82          * macro getbkgd() will work.
  83          */
  84         {
  85             cchar_t wch;
  86             int tmp;
  87
  88             memset(&wch, 0, sizeof(wch));
  89             (void) wgetbkgrnd(win, &wch);
  90             tmp = _nc_to_char((wint_t) CharOf(wch));
  91
  92             win->_bkgd = (((tmp == EOF) ? ' ' : (chtype) tmp)
  93                           | (AttrOf(wch) & ALL_BUT_COLOR)
  94                           | (chtype) ColorPair(GET_WINDOW_PAIR(win)));
  95         }
  96 #endif
  97     }
  98     returnVoid;
  99 }
 100
 101 NCURSES_EXPORT(void)
 102 wbkgdset(WINDOW *win, chtype ch)
 103 {
 104     NCURSES_CH_T wch;
 105     SetChar2(wch, ch);
 106     wbkgrndset(win, CHREF(wch));
 107 }
 108
 109 /*
 110  * Set the window's background information and apply it to each cell.
 111  */
 112 #if USE_WIDEC_SUPPORT
 113 NCURSES_EXPORT(int)
 114 #else
 115 static NCURSES_INLINE int
 116 #undef wbkgrnd
 117 #endif
 118 wbkgrnd(WINDOW *win, const ARG_CH_T ch)
 119 {
 120     int code = ERR;
 121     int x, y;
 122
 123     T((T_CALLED("wbkgd(%p,%s)"), (void *) win, _tracech_t(ch)));
 124
 125     if (win) {
 126         NCURSES_CH_T new_bkgd = CHDEREF(ch);
 127         NCURSES_CH_T old_bkgrnd;
 128
 129         memset(&old_bkgrnd, 0, sizeof(old_bkgrnd));
 130         wgetbkgrnd(win, &old_bkgrnd);
 131
 132         (void) wbkgrndset(win, CHREF(new_bkgd));
 133         (void) wattrset(win, (int) AttrOf(win->_nc_bkgd));
 134
 135         for (y = 0; y <= win->_maxy; y++) {
 136             for (x = 0; x <= win->_maxx; x++) {
 137                 if (CharEq(win->_line[y].text[x], old_bkgrnd)) {
 138                     win->_line[y].text[x] = win->_nc_bkgd;
 139                 } else {
 140                     NCURSES_CH_T wch = win->_line[y].text[x];
 141                     RemAttr(wch, (~(A_ALTCHARSET | A_CHARTEXT)));
 142                     win->_line[y].text[x] = _nc_render(win, wch);
 143                 }
 144             }
 145         }
 146         touchwin(win);
 147         _nc_synchook(win);
 148         code = OK;
 149     }
 150     returnCode(code);
 151 }
 152
 153 NCURSES_EXPORT(int)
 154 wbkgd(WINDOW *win, chtype ch)
 155 {
 156     NCURSES_CH_T wch;
 157     SetChar2(wch, ch);
 158     return wbkgrnd(win, CHREF(wch));
 159 }