lib_insch.c revision 166124 
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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
46MODULE_ID("$Id: lib_insch.c,v 1.24 2005/02/26 19:27:28 tom Exp $")
47
48/*
49 * Insert the given character, updating the current location to simplify
50 * inserting a string.
51 */
52NCURSES_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
60    switch (ch) {
61    case '\t':
62	for (count = (TABSIZE - (win->_curx % TABSIZE)); count > 0; count--) {
63	    if ((code = _nc_insert_ch(win, ' ')) != OK)
64		break;
65	}
66	break;
67    case '\n':
68    case '\r':
69    case '\b':
70	SetChar2(wch, ch);
71	_nc_waddch_nosync(win, wch);
72	break;
73    default:
74	if (
75#if USE_WIDEC_SUPPORT
76	       WINDOW_EXT(win, addch_used) == 0 &&
77#endif
78	       is8bits(ChCharOf(ch)) &&
79	       isprint(ChCharOf(ch))) {
80	    if (win->_curx <= win->_maxx) {
81		struct ldat *line = &(win->_line[win->_cury]);
82		NCURSES_CH_T *end = &(line->text[win->_curx]);
83		NCURSES_CH_T *temp1 = &(line->text[win->_maxx]);
84		NCURSES_CH_T *temp2 = temp1 - 1;
85
86		SetChar2(wch, ch);
87
88		CHANGED_TO_EOL(line, win->_curx, win->_maxx);
89		while (temp1 > end)
90		    *temp1-- = *temp2--;
91
92		*temp1 = _nc_render(win, wch);
93		win->_curx++;
94	    }
95	} else if (is8bits(ChCharOf(ch)) && iscntrl(ChCharOf(ch))) {
96	    s = unctrl(ChCharOf(ch));
97	    while (*s != '\0') {
98		if ((code = _nc_insert_ch(win, ChAttrOf(ch) | UChar(*s))) != OK)
99		    break;
100		++s;
101	    }
102	}
103#if USE_WIDEC_SUPPORT
104	else {
105	    /*
106	     * Handle multibyte characters here
107	     */
108	    SetChar2(wch, ch);
109	    wch = _nc_render(win, wch);
110	    if (_nc_build_wch(win, &wch) >= 0)
111		code = wins_wch(win, &wch);
112	}
113#endif
114	break;
115    }
116    return code;
117}
118
119NCURSES_EXPORT(int)
120winsch(WINDOW *win, chtype c)
121{
122    NCURSES_SIZE_T oy;
123    NCURSES_SIZE_T ox;
124    int code = ERR;
125
126    T((T_CALLED("winsch(%p, %s)"), win, _tracechtype(c)));
127
128    if (win != 0) {
129	oy = win->_cury;
130	ox = win->_curx;
131
132	code = _nc_insert_ch(win, c);
133
134	win->_curx = ox;
135	win->_cury = oy;
136	_nc_synchook(win);
137    }
138    returnCode(code);
139}
140