1 /****************************************************************************
2  * Copyright 2019,2020 Thomas E. Dickey                                     *
3  * Copyright 2002-2016,2017 Free Software Foundation, Inc.                  *
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29 
30 /****************************************************************************
31  *  Author: Thomas Dickey 2002                                              *
32  ****************************************************************************/
33 
34 /*
35 **	lib_ins_wch.c
36 **
37 **	The routine wins_wch().
38 **
39 */
40 
41 #include <curses.priv.h>
42 
43 MODULE_ID("$Id: lib_ins_wch.c,v 1.24 2020/02/02 23:34:34 tom Exp $")
44 
45 /*
46  * Insert the given character, updating the current location to simplify
47  * inserting a string.
48  */
49 NCURSES_EXPORT(int)
50 _nc_insert_wch(WINDOW *win, const cchar_t *wch)
51 {
52     int cells = _nc_wacs_width(CharOf(CHDEREF(wch)));
53     int code = OK;
54 
55     if (cells < 0) {
56 	code = winsch(win, (chtype) CharOf(CHDEREF(wch)));
57     } else {
58 	if (cells == 0)
59 	    cells = 1;
60 
61 	if (win->_curx <= win->_maxx) {
62 	    int cell;
63 	    struct ldat *line = &(win->_line[win->_cury]);
64 	    NCURSES_CH_T *end = &(line->text[win->_curx]);
65 	    NCURSES_CH_T *temp1 = &(line->text[win->_maxx]);
66 	    NCURSES_CH_T *temp2 = temp1 - cells;
67 
68 	    CHANGED_TO_EOL(line, win->_curx, win->_maxx);
69 	    while (temp1 > end)
70 		*temp1-- = *temp2--;
71 
72 	    *temp1 = _nc_render(win, *wch);
73 	    for (cell = 1; cell < cells; ++cell) {
74 		SetWidecExt(temp1[cell], cell);
75 	    }
76 
77 	    win->_curx = (NCURSES_SIZE_T) (win->_curx + cells);
78 	}
79     }
80     return code;
81 }
82 
83 NCURSES_EXPORT(int)
84 wins_wch(WINDOW *win, const cchar_t *wch)
85 {
86     int code = ERR;
87 
88     T((T_CALLED("wins_wch(%p, %s)"), (void *) win, _tracecchar_t(wch)));
89 
90     if (win != 0) {
91 	NCURSES_SIZE_T oy = win->_cury;
92 	NCURSES_SIZE_T ox = win->_curx;
93 
94 	code = _nc_insert_wch(win, wch);
95 
96 	win->_curx = ox;
97 	win->_cury = oy;
98 	_nc_synchook(win);
99     }
100     returnCode(code);
101 }
102 
103 NCURSES_EXPORT(int)
104 wins_nwstr(WINDOW *win, const wchar_t *wstr, int n)
105 {
106     int code = ERR;
107 
108     T((T_CALLED("wins_nwstr(%p,%s,%d)"),
109        (void *) win, _nc_viswbufn(wstr, n), n));
110 
111     if (win != 0
112 	&& wstr != 0) {
113 	if (n < 1)
114 	    n = (int) wcslen(wstr);
115 	code = OK;
116 
117 	if (n > 0) {
118 	    const wchar_t *cp;
119 	    SCREEN *sp = _nc_screen_of(win);
120 	    NCURSES_SIZE_T oy = win->_cury;
121 	    NCURSES_SIZE_T ox = win->_curx;
122 
123 	    for (cp = wstr; ((cp - wstr) < n) && *cp; cp++) {
124 		int len = _nc_wacs_width(*cp);
125 
126 		if ((len >= 0 && len != 1) || !is7bits(*cp)) {
127 		    cchar_t tmp_cchar;
128 		    wchar_t tmp_wchar = *cp;
129 		    memset(&tmp_cchar, 0, sizeof(tmp_cchar));
130 		    (void) setcchar(&tmp_cchar,
131 				    &tmp_wchar,
132 				    WA_NORMAL,
133 				    (short) 0,
134 				    (void *) 0);
135 		    code = _nc_insert_wch(win, &tmp_cchar);
136 		} else {
137 		    /* tabs, other ASCII stuff */
138 		    code = _nc_insert_ch(sp, win, (chtype) (*cp));
139 		}
140 		if (code != OK)
141 		    break;
142 	    }
143 
144 	    win->_curx = ox;
145 	    win->_cury = oy;
146 	    _nc_synchook(win);
147 	}
148     }
149     returnCode(code);
150 }
151