ncurses/base/lib_insch.c

   1 /****************************************************************************
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  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  *
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  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: Sven Verdoolaege                                                *
  33  *     and: Thomas E. Dickey                                                *
  34  ****************************************************************************/
  35
  36 /*
  37 **      lib_insch.c
  38 **
  39 **      The routine winsch().
  40 **
  41 */
  42
  43 #include <curses.priv.h>
  44 #include <ctype.h>
  45
  46 MODULE_ID("$Id: lib_insch.c,v 1.27 2009/04/18 23:53:33 tom Exp $")
  47
  48 /*
  49  * Insert the given character, updating the current location to simplify
  50  * inserting a string.
  51  */
  52 NCURSES_EXPORT(int)
  53 _nc_insert_ch(WINDOW *win, chtype ch)
  54 {
  55     int code = OK;
  56     NCURSES_CH_T wch;
  57     int count;
  58     NCURSES_CONST char *s;
  59 #if NCURSES_SP_FUNCS || USE_REENTRANT
  60     SCREEN *sp = _nc_screen_of(win);
  61 #endif
  62     int tabsize =
  63 #if USE_REENTRANT
  64     sp->_TABSIZE
  65 #else
  66     TABSIZE
  67 #endif
  68      ;
  69     switch (ch) {
  70     case '\t':
  71         for (count = (tabsize - (win->_curx % tabsize)); count > 0; count--) {
  72             if ((code = _nc_insert_ch(win, ' ')) != OK)
  73                 break;
  74         }
  75         break;
  76     case '\n':
  77     case '\r':
  78     case '\b':
  79         SetChar2(wch, ch);
  80         _nc_waddch_nosync(win, wch);
  81         break;
  82     default:
  83         if (
  84 #if USE_WIDEC_SUPPORT
  85                WINDOW_EXT(win, addch_used) == 0 &&
  86 #endif
  87                is8bits(ChCharOf(ch)) &&
  88                isprint(ChCharOf(ch))) {
  89             if (win->_curx <= win->_maxx) {
  90                 struct ldat *line = &(win->_line[win->_cury]);
  91                 NCURSES_CH_T *end = &(line->text[win->_curx]);
  92                 NCURSES_CH_T *temp1 = &(line->text[win->_maxx]);
  93                 NCURSES_CH_T *temp2 = temp1 - 1;
  94
  95                 SetChar2(wch, ch);
  96
  97                 CHANGED_TO_EOL(line, win->_curx, win->_maxx);
  98                 while (temp1 > end)
  99                     *temp1-- = *temp2--;
 100
 101                 *temp1 = _nc_render(win, wch);
 102                 win->_curx++;
 103             }
 104         } else if (is8bits(ChCharOf(ch)) && iscntrl(ChCharOf(ch))) {
 105             s = NCURSES_SP_NAME(unctrl) (NCURSES_SP_ARGx ChCharOf(ch));
 106             while (*s != '\0') {
 107                 code = _nc_insert_ch(win, ChAttrOf(ch) | UChar(*s));
 108                 if (code != OK)
 109                     break;
 110                 ++s;
 111             }
 112         }
 113 #if USE_WIDEC_SUPPORT
 114         else {
 115             /*
 116              * Handle multibyte characters here
 117              */
 118             SetChar2(wch, ch);
 119             wch = _nc_render(win, wch);
 120             count = _nc_build_wch(win, &wch);
 121             if (count > 0) {
 122                 code = wins_wch(win, &wch);
 123             } else if (count == -1) {
 124                 /* handle EILSEQ */
 125                 if (is8bits(ch)) {
 126                     s = NCURSES_SP_NAME(unctrl) (NCURSES_SP_ARGx ChCharOf(ch));
 127                     while (*s != '\0') {
 128                         code = _nc_insert_ch(win, ChAttrOf(ch) | UChar(*s));
 129                         if (code != OK)
 130                             break;
 131                         ++s;
 132                     }
 133                 } else {
 134                     code = ERR;
 135                 }
 136             }
 137         }
 138 #endif
 139         break;
 140     }
 141     return code;
 142 }
 143
 144 NCURSES_EXPORT(int)
 145 winsch(WINDOW *win, chtype c)
 146 {
 147     NCURSES_SIZE_T oy;
 148     NCURSES_SIZE_T ox;
 149     int code = ERR;
 150
 151     T((T_CALLED("winsch(%p, %s)"), win, _tracechtype(c)));
 152
 153     if (win != 0) {
 154         oy = win->_cury;
 155         ox = win->_curx;
 156
 157         code = _nc_insert_ch(win, c);
 158
 159         win->_curx = ox;
 160         win->_cury = oy;
 161         _nc_synchook(win);
 162     }
 163     returnCode(code);
 164 }