1 /* $NetBSD: resize.c,v 1.20 2009/07/22 16:57:15 roy Exp $ */
2
3 /*
4 * Copyright (c) 2001
5 * Brett Lymn.
6 *
7 * This code has been donated to The NetBSD Foundation by the Author.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38 #include <sys/cdefs.h>
39 #ifndef lint
40 #if 0
41 static char sccsid[] = "@(#)resize.c blymn 2001/08/26";
42 #else
43 __RCSID("$NetBSD: resize.c,v 1.20 2009/07/22 16:57:15 roy Exp $");
44 #endif
45 #endif /* not lint */
46
47 #include <stdlib.h>
48
49 #include "curses.h"
50 #include "curses_private.h"
51
52 static int __resizeterm(WINDOW *win, int nlines, int ncols);
53 static int __resizewin(WINDOW *win, int nlines, int ncols);
54
55 /*
56 * wresize --
57 * Resize the given window to the new size.
58 */
59 int
wresize(WINDOW * win,int req_nlines,int req_ncols)60 wresize(WINDOW *win, int req_nlines, int req_ncols)
61 {
62 int nlines = req_nlines;
63 int ncols = req_ncols;
64
65 if (win == NULL)
66 return ERR;
67
68 #ifdef DEBUG
69 __CTRACE(__CTRACE_WINDOW, "wresize: (%p, %d, %d)\n",
70 win, nlines, ncols);
71 #endif
72 if (win->orig == NULL) {
73 /* bound "our" windows by the screen size */
74 if (win == curscr || win == __virtscr || win == stdscr) {
75 if (nlines > LINES)
76 nlines = LINES;
77 if (nlines < 1)
78 nlines = 1;
79 if (ncols > COLS)
80 ncols = COLS;
81 if (ncols < 1)
82 ncols = 1;
83 } else {
84 if (win->begy > LINES)
85 win->begy = 0;
86 if (win->begy + nlines > LINES)
87 nlines = 0;
88 if (nlines <= 0)
89 nlines += LINES - win->begy;
90 if (nlines < 1)
91 nlines = 1;
92 if (win->begx > COLS)
93 win->begx = 0;
94 if (win->begx + ncols > COLS)
95 ncols = 0;
96 if (ncols <= 0)
97 ncols += COLS - win->begx;
98 if (ncols < 1)
99 ncols = 1;
100 }
101 } else {
102 /* subwins must fit inside the parent - check this */
103 if (win->begy > win->orig->begy + win->orig->maxy)
104 win->begy = win->orig->begy + win->orig->maxy - 1;
105 if (win->begy + nlines > win->orig->begy + win->orig->maxy)
106 nlines = 0;
107 if (nlines <= 0)
108 nlines += win->orig->begy + win->orig->maxy - win->begy;
109 if (nlines < 1)
110 nlines = 1;
111 if (win->begx > win->orig->begx + win->orig->maxx)
112 win->begx = win->orig->begx + win->orig->maxx - 1;
113 if (win->begx + ncols > win->orig->begx + win->orig->maxx)
114 ncols = 0;
115 if (ncols <= 0)
116 ncols += win->orig->begx + win->orig->maxx - win->begx;
117 if (ncols < 1)
118 ncols = 1;
119 }
120
121 if ((__resizewin(win, nlines, ncols)) == ERR)
122 return ERR;
123
124 win->reqy = req_nlines;
125 win->reqx = req_ncols;
126
127 /* If someone resizes curscr, we must also resize __virtscr */
128 if (win == curscr) {
129 if ((__resizewin(__virtscr, nlines, ncols)) == ERR)
130 return ERR;
131 __virtscr->reqy = req_nlines;
132 __virtscr->reqx = req_ncols;
133 }
134
135 return OK;
136 }
137
138 /*
139 * resizeterm --
140 * Resize the terminal window, resizing the dependent windows.
141 */
142 int
resizeterm(int nlines,int ncols)143 resizeterm(int nlines, int ncols)
144 {
145 WINDOW *win;
146 struct __winlist *list;
147
148 #ifdef DEBUG
149 __CTRACE(__CTRACE_WINDOW, "resizeterm: (%d, %d)\n", nlines, ncols);
150 #endif
151
152 if (__resizeterm(curscr, nlines, ncols) == ERR)
153 return ERR;
154 if (__resizeterm(__virtscr, nlines, ncols) == ERR)
155 return ERR;
156 if (__resizeterm(stdscr, nlines, ncols) == ERR)
157 return ERR;
158
159 LINES = nlines;
160 COLS = ncols;
161
162 /* tweak the flags now that we have updated the LINES and COLS */
163 for (list = _cursesi_screen->winlistp; list != NULL; list = list->nextp) {
164 win = list->winp;
165
166 if (!(win->flags & __ISPAD))
167 __swflags(win);
168 }
169
170 wrefresh(curscr);
171 return OK;
172 }
173
174 /*
175 * __resizeterm
176 * Setup window for resizing.
177 */
178 static int
__resizeterm(WINDOW * win,int nlines,int ncols)179 __resizeterm(WINDOW *win, int nlines, int ncols)
180 {
181 int newlines, newcols;
182
183 newlines = win->reqy;
184 if (win->begy + newlines >= nlines)
185 newlines = 0;
186 if (newlines == 0)
187 newlines = nlines - win->begy;
188
189 newcols = win->reqx;
190 if (win->begx + newcols >= ncols)
191 newcols = 0;
192 if (newcols == 0)
193 newcols = ncols - win->begx;
194
195 return __resizewin(win, newlines, newcols);
196 }
197
198 /*
199 * __resizewin --
200 * Resize the given window.
201 */
202 static int
__resizewin(WINDOW * win,int nlines,int ncols)203 __resizewin(WINDOW *win, int nlines, int ncols)
204 {
205 __LINE *lp, *olp, **newlines, *newlspace;
206 __LDATA *sp;
207 __LDATA *newwspace;
208 int i, j;
209 int y, x;
210 WINDOW *swin;
211
212 #ifdef DEBUG
213 __CTRACE(__CTRACE_WINDOW, "resize: (%p, %d, %d)\n", win, nlines, ncols);
214 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr);
215 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags);
216 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy);
217 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx);
218 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy);
219 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx);
220 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t);
221 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b);
222 #endif
223
224 /*
225 * free up any non-spacing storage before we lose the
226 * pointers...
227 */
228 #ifdef HAVE_WCHAR
229 __cursesi_win_free_nsp(win);
230 #endif
231
232 if (nlines <= 0 || ncols <= 0)
233 nlines = ncols = 0;
234 else {
235 /* Reallocate line pointer array and line space. */
236 newlines = realloc(win->alines, nlines * sizeof(__LINE *));
237 if (newlines == NULL)
238 return ERR;
239 win->alines = newlines;
240
241 newlspace = realloc(win->lspace, nlines * sizeof(__LINE));
242 if (newlspace == NULL)
243 return ERR;
244 win->lspace = newlspace;
245 }
246
247 /* Don't allocate window and line space if it's a subwindow */
248 if (win->orig == NULL) {
249 /*
250 * Allocate window space in one chunk.
251 */
252 if (ncols != 0) {
253 newwspace = realloc(win->wspace,
254 ncols * nlines * sizeof(__LDATA));
255 if (newwspace == NULL)
256 return ERR;
257 win->wspace = newwspace;
258 }
259
260 /*
261 * Point line pointers to line space, and lines themselves into
262 * window space.
263 */
264 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) {
265 win->alines[i] = lp;
266 lp->line = &win->wspace[i * ncols];
267 #ifdef DEBUG
268 lp->sentinel = SENTINEL_VALUE;
269 #endif
270 lp->firstchp = &lp->firstch;
271 lp->lastchp = &lp->lastch;
272 lp->firstch = 0;
273 lp->lastch = ncols - 1;
274 lp->flags = __ISDIRTY;
275 }
276 } else {
277
278 win->ch_off = win->begx - win->orig->begx;
279 /* Point line pointers to line space. */
280 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) {
281 win->alines[i] = lp;
282 olp = win->orig->alines[i + win->begy - win->orig->begy];
283 lp->line = &olp->line[win->ch_off];
284 #ifdef DEBUG
285 lp->sentinel = SENTINEL_VALUE;
286 #endif
287 lp->firstchp = &olp->firstch;
288 lp->lastchp = &olp->lastch;
289 lp->flags = __ISDIRTY;
290 }
291 }
292
293
294 win->cury = win->curx = 0;
295 win->maxy = nlines;
296 win->maxx = ncols;
297 win->scr_b = win->maxy - 1;
298 __swflags(win);
299
300 /*
301 * we must zot the window contents otherwise lines may pick
302 * up attributes from the previous line when the window is
303 * made smaller. The client will redraw the window anyway
304 * so this is no big deal.
305 */
306 for (i = 0; i < win->maxy; i++) {
307 lp = win->alines[i];
308 for (sp = lp->line, j = 0; j < win->maxx; j++, sp++) {
309 sp->attr = 0;
310 #ifndef HAVE_WCHAR
311 sp->ch = win->bch;
312 #else
313 sp->ch = ( wchar_t )btowc(( int ) win->bch );
314 sp->nsp = NULL;
315 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR)
316 return ERR;
317 SET_WCOL( *sp, 1 );
318 #endif /* HAVE_WCHAR */
319 }
320 lp->hash = __hash((char *)(void *)lp->line,
321 (size_t) (ncols * __LDATASIZE));
322 }
323
324 #ifdef DEBUG
325 __CTRACE(__CTRACE_WINDOW, "resize: win->wattr = %08x\n", win->wattr);
326 __CTRACE(__CTRACE_WINDOW, "resize: win->flags = %#.4x\n", win->flags);
327 __CTRACE(__CTRACE_WINDOW, "resize: win->maxy = %d\n", win->maxy);
328 __CTRACE(__CTRACE_WINDOW, "resize: win->maxx = %d\n", win->maxx);
329 __CTRACE(__CTRACE_WINDOW, "resize: win->begy = %d\n", win->begy);
330 __CTRACE(__CTRACE_WINDOW, "resize: win->begx = %d\n", win->begx);
331 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_t = %d\n", win->scr_t);
332 __CTRACE(__CTRACE_WINDOW, "resize: win->scr_b = %d\n", win->scr_b);
333 #endif
334
335 if (win->orig == NULL) {
336 /* bound subwindows to new size and fixup their pointers */
337 for (swin = win->nextp; swin != win; swin = swin->nextp) {
338 y = swin->reqy;
339 if (swin->begy > win->begy + win->maxy)
340 swin->begy = win->begy + win->maxy - 1;
341 if (swin->begy + y > win->begy + win->maxy)
342 y = 0;
343 if (y <= 0)
344 y += win->begy + win->maxy - swin->begy;
345 if (y < 1)
346 y = 1;
347 x = swin->reqx;
348 if (swin->begx > win->begx + win->maxx)
349 swin->begx = win->begx + win->maxx - 1;
350 if (swin->begx + x > win->begx + win->maxx)
351 x = 0;
352 if (x <= 0)
353 x += win->begy + win->maxx - swin->begx;
354 if (x < 1)
355 x = 1;
356 __resizewin(swin, y, x);
357 }
358 }
359
360 return OK;
361 }
362