1 /* $OpenBSD: lib_ins_wch.c,v 1.2 2023/10/17 09:52:09 nicm Exp $ */
2 
3 /****************************************************************************
4  * Copyright 2019,2020 Thomas E. Dickey                                     *
5  * Copyright 2002-2016,2017 Free Software Foundation, Inc.                  *
6  *                                                                          *
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31 
32 /****************************************************************************
33  *  Author: Thomas Dickey 2002                                              *
34  ****************************************************************************/
35 
36 /*
37 **	lib_ins_wch.c
38 **
39 **	The routine wins_wch().
40 **
41 */
42 
43 #include <curses.priv.h>
44 
45 MODULE_ID("$Id: lib_ins_wch.c,v 1.2 2023/10/17 09:52:09 nicm Exp $")
46 
47 /*
48  * Insert the given character, updating the current location to simplify
49  * inserting a string.
50  */
51 NCURSES_EXPORT(int)
52 _nc_insert_wch(WINDOW *win, const cchar_t *wch)
53 {
54     int cells = _nc_wacs_width(CharOf(CHDEREF(wch)));
55     int code = OK;
56 
57     if (cells < 0) {
58 	code = winsch(win, (chtype) CharOf(CHDEREF(wch)));
59     } else {
60 	if (cells == 0)
61 	    cells = 1;
62 
63 	if (win->_curx <= win->_maxx) {
64 	    int cell;
65 	    struct ldat *line = &(win->_line[win->_cury]);
66 	    NCURSES_CH_T *end = &(line->text[win->_curx]);
67 	    NCURSES_CH_T *temp1 = &(line->text[win->_maxx]);
68 	    NCURSES_CH_T *temp2 = temp1 - cells;
69 
70 	    CHANGED_TO_EOL(line, win->_curx, win->_maxx);
71 	    while (temp1 > end)
72 		*temp1-- = *temp2--;
73 
74 	    *temp1 = _nc_render(win, *wch);
75 	    for (cell = 1; cell < cells; ++cell) {
76 		SetWidecExt(temp1[cell], cell);
77 	    }
78 
79 	    win->_curx = (NCURSES_SIZE_T) (win->_curx + cells);
80 	}
81     }
82     return code;
83 }
84 
85 NCURSES_EXPORT(int)
86 wins_wch(WINDOW *win, const cchar_t *wch)
87 {
88     int code = ERR;
89 
90     T((T_CALLED("wins_wch(%p, %s)"), (void *) win, _tracecchar_t(wch)));
91 
92     if (win != 0) {
93 	NCURSES_SIZE_T oy = win->_cury;
94 	NCURSES_SIZE_T ox = win->_curx;
95 
96 	code = _nc_insert_wch(win, wch);
97 
98 	win->_curx = ox;
99 	win->_cury = oy;
100 	_nc_synchook(win);
101     }
102     returnCode(code);
103 }
104 
105 NCURSES_EXPORT(int)
106 wins_nwstr(WINDOW *win, const wchar_t *wstr, int n)
107 {
108     int code = ERR;
109 
110     T((T_CALLED("wins_nwstr(%p,%s,%d)"),
111        (void *) win, _nc_viswbufn(wstr, n), n));
112 
113     if (win != 0
114 	&& wstr != 0) {
115 	if (n < 1)
116 	    n = INT_MAX;
117 	code = OK;
118 
119 	if (n > 0) {
120 	    const wchar_t *cp;
121 	    SCREEN *sp = _nc_screen_of(win);
122 	    NCURSES_SIZE_T oy = win->_cury;
123 	    NCURSES_SIZE_T ox = win->_curx;
124 
125 	    for (cp = wstr; (*cp != L'\0') && ((cp - wstr) < n); cp++) {
126 		int len = _nc_wacs_width(*cp);
127 
128 		if ((len >= 0 && len != 1) || !is7bits(*cp)) {
129 		    cchar_t tmp_cchar;
130 		    wchar_t tmp_wchar = *cp;
131 		    memset(&tmp_cchar, 0, sizeof(tmp_cchar));
132 		    (void) setcchar(&tmp_cchar,
133 				    &tmp_wchar,
134 				    WA_NORMAL,
135 				    (short) 0,
136 				    (void *) 0);
137 		    code = _nc_insert_wch(win, &tmp_cchar);
138 		} else {
139 		    /* tabs, other ASCII stuff */
140 		    code = _nc_insert_ch(sp, win, (chtype) (*cp));
141 		}
142 		if (code != OK)
143 		    break;
144 	    }
145 
146 	    win->_curx = ox;
147 	    win->_cury = oy;
148 	    _nc_synchook(win);
149 	}
150     }
151     returnCode(code);
152 }
153