1 /* $NetBSD: screen.c,v 1.23 2010/06/10 05:24:55 dholland Exp $ */
2
3 /*
4 * Copyright (c) 1981, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)screen.c 8.2 (blymn) 11/27/2001";
36 #else
37 __RCSID("$NetBSD: screen.c,v 1.23 2010/06/10 05:24:55 dholland Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include <stdlib.h>
42
43 #include "curses.h"
44 #include "curses_private.h"
45
46 /*
47 * set_term --
48 * Change the term to the given screen.
49 *
50 */
51 SCREEN *
set_term(SCREEN * new)52 set_term(SCREEN *new)
53 {
54 SCREEN *old_screen = _cursesi_screen;
55
56 if (_cursesi_screen != NULL) {
57 /* save changes made to the current screen... */
58 old_screen->echoit = __echoit;
59 old_screen->pfast = __pfast;
60 old_screen->rawmode = __rawmode;
61 old_screen->noqch = __noqch;
62 old_screen->COLS = COLS;
63 old_screen->LINES = LINES;
64 old_screen->COLORS = COLORS;
65 old_screen->COLOR_PAIRS = COLOR_PAIRS;
66 old_screen->GT = __GT;
67 old_screen->NONL = __NONL;
68 old_screen->UPPERCASE = __UPPERCASE;
69 }
70
71 _cursesi_screen = new;
72
73 __echoit = new->echoit;
74 __pfast = new->pfast;
75 __rawmode = new->rawmode;
76 __noqch = new->noqch;
77 COLS = new->COLS;
78 LINES = new->LINES;
79 COLORS = new->COLORS;
80 COLOR_PAIRS = new->COLOR_PAIRS;
81 __GT = new->GT;
82 __NONL = new->NONL;
83 __UPPERCASE = new->UPPERCASE;
84
85 _cursesi_resetterm(new);
86
87 curscr = new->curscr;
88 clearok(curscr, new->clearok);
89 stdscr = new->stdscr;
90 __virtscr = new->__virtscr;
91
92 _cursesi_reset_acs(new);
93 #ifdef HAVE_WCHAR
94 _cursesi_reset_wacs(new);
95 #endif /* HAVE_WCHAR */
96
97 #ifdef DEBUG
98 __CTRACE(__CTRACE_SCREEN, "set_term: LINES = %d, COLS = %d\n",
99 LINES, COLS);
100 #endif
101
102 return old_screen;
103 }
104
105 /*
106 * newterm --
107 * Set up a new screen.
108 *
109 */
110 SCREEN *
newterm(char * type,FILE * outfd,FILE * infd)111 newterm(char *type, FILE *outfd, FILE *infd)
112 {
113 SCREEN *new_screen;
114 char *sp;
115
116 sp = type;
117 if ((type == NULL) && (sp = getenv("TERM")) == NULL)
118 return NULL;
119
120 if ((new_screen = calloc(1, sizeof(SCREEN))) == NULL)
121 return NULL;
122
123 #ifdef DEBUG
124 __CTRACE(__CTRACE_INIT, "newterm\n");
125 #endif
126
127 new_screen->infd = infd;
128 new_screen->outfd = outfd;
129 new_screen->echoit = new_screen->nl = 1;
130 new_screen->pfast = new_screen->rawmode = new_screen->noqch = 0;
131 new_screen->nca = A_NORMAL;
132 new_screen->color_type = COLOR_NONE;
133 new_screen->COLOR_PAIRS = 0;
134 new_screen->old_mode = 2;
135 new_screen->stdbuf = NULL;
136 new_screen->stdscr = NULL;
137 new_screen->curscr = NULL;
138 new_screen->__virtscr = NULL;
139 new_screen->curwin = 0;
140 new_screen->notty = FALSE;
141 new_screen->half_delay = FALSE;
142 new_screen->resized = 0;
143 new_screen->unget_len = 32;
144
145 if ((new_screen->unget_list =
146 malloc(sizeof(wchar_t) * new_screen->unget_len)) == NULL) {
147 goto error_exit;
148 }
149 new_screen->unget_pos = 0;
150
151 if (_cursesi_gettmode(new_screen) == ERR)
152 goto error_exit;
153
154 if (_cursesi_setterm((char *)sp, new_screen) == ERR)
155 goto error_exit;
156
157 /* Need either homing or cursor motion for refreshes */
158 if (!t_cursor_home(new_screen->term) &&
159 !t_cursor_address(new_screen->term))
160 goto error_exit;
161
162 new_screen->winlistp = NULL;
163
164 if ((new_screen->curscr = __newwin(new_screen, 0,
165 0, 0, 0, FALSE)) == NULL)
166 goto error_exit;
167
168 if ((new_screen->stdscr = __newwin(new_screen, 0,
169 0, 0, 0, FALSE)) == NULL) {
170 delwin(new_screen->curscr);
171 goto error_exit;
172 }
173
174 clearok(new_screen->stdscr, 1);
175
176 if ((new_screen->__virtscr = __newwin(new_screen, 0,
177 0, 0, 0, FALSE)) == NULL) {
178 delwin(new_screen->curscr);
179 delwin(new_screen->stdscr);
180 goto error_exit;
181 }
182
183 __init_getch(new_screen);
184 __init_acs(new_screen);
185 #ifdef HAVE_WCHAR
186 __init_get_wch( new_screen );
187 __init_wacs(new_screen);
188 #endif /* HAVE_WCHAR */
189
190 __set_stophandler();
191 __set_winchhandler();
192
193 /*
194 * bleh - it seems that apps expect the first newterm to set
195 * up the curses screen.... emulate this.
196 */
197 if (_cursesi_screen == NULL || _cursesi_screen->endwin) {
198 set_term(new_screen);
199 }
200
201 #ifdef DEBUG
202 __CTRACE(__CTRACE_SCREEN, "newterm: LINES = %d, COLS = %d\n",
203 LINES, COLS);
204 #endif
205 __startwin(new_screen);
206
207 return new_screen;
208
209 error_exit:
210 free(new_screen);
211 return NULL;
212 }
213
214 /*
215 * delscreen --
216 * Free resources used by the given screen and destroy it.
217 *
218 */
219 void
delscreen(SCREEN * screen)220 delscreen(SCREEN *screen)
221 {
222 struct __winlist *list;
223
224 #ifdef DEBUG
225 __CTRACE(__CTRACE_SCREEN, "delscreen(%p)\n", screen);
226 #endif
227 /* free up the terminfo stuff */
228 del_curterm(screen->term);
229
230 /* walk the window list and kill all the parent windows */
231 while ((list = screen->winlistp) != NULL) {
232 delwin(list->winp);
233 if (list == screen->winlistp)
234 /* sanity - abort if window didn't remove itself */
235 break;
236 }
237
238 /* free the storage of the keymaps */
239 _cursesi_free_keymap(screen->base_keymap);
240
241 free(screen->stdbuf);
242 screen->stdbuf = NULL;
243 if (_cursesi_screen == screen)
244 _cursesi_screen = NULL;
245 free(screen);
246 }
247