ncurses 5.7 - patch 20090418
[ncurses.git] / ncurses / base / lib_insch.c
1 /****************************************************************************
2  * Copyright (c) 1998-2008,2009 Free Software Foundation, Inc.              *
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6  * "Software"), to deal in the Software without restriction, including      *
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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    *
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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: 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 }