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nsxivmain.c

485 lines · 9.2 KB · C

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1/* sxiv: main.c
2 * Copyright (c) 2011 Bert Muennich <muennich at informatik.hu-berlin.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19#include <stdlib.h>
20#include <stdio.h>
21#include <string.h>
22#include <dirent.h>
23#include <sys/select.h>
24#include <sys/stat.h>
25
26#include <X11/Xlib.h>
27#include <X11/Xutil.h>
28#include <X11/keysym.h>
29
30#include "image.h"
31#include "options.h"
32#include "util.h"
33#include "window.h"
34
35void update_title();
36int check_append(const char*);
37void read_dir_rec(const char*);
38void run();
39
40img_t img;
41win_t win;
42
43#define DNAME_CNT 512
44#define FNAME_CNT 4096
45const char **filenames;
46int filecnt, fileidx;
47size_t filesize;
48
49#define TITLE_LEN 256
50char win_title[TITLE_LEN];
51
52void cleanup() {
53 static int in = 0;
54
55 if (!in++) {
56 img_free(&img);
57 win_close(&win);
58 }
59}
60
61int load_image() {
62 struct stat fstats;
63
64 if (!stat(filenames[fileidx], &fstats))
65 filesize = fstats.st_size;
66 else
67 filesize = 0;
68
69 return img_load(&img, filenames[fileidx]);
70}
71
72int main(int argc, char **argv) {
73 int i;
74 const char *filename;
75 struct stat fstats;
76
77 parse_options(argc, argv);
78
79 if (!options->filecnt) {
80 print_usage();
81 exit(1);
82 }
83
84 if (options->recursive)
85 filecnt = FNAME_CNT;
86 else
87 filecnt = options->filecnt;
88
89 filenames = (const char**) s_malloc(filecnt * sizeof(const char*));
90 fileidx = 0;
91
92 for (i = 0; i < options->filecnt; ++i) {
93 filename = options->filenames[i];
94 if (!stat(filename, &fstats) && S_ISDIR(fstats.st_mode)) {
95 if (options->recursive)
96 read_dir_rec(filename);
97 else
98 warn("ignoring directory: %s", filename);
99 } else {
100 check_append(filename);
101 }
102 }
103
104 filecnt = fileidx;
105 fileidx = 0;
106
107 if (!filecnt) {
108 fprintf(stderr, "sxiv: no valid image filename given, aborting\n");
109 exit(1);
110 }
111
112 win_open(&win);
113 img_init(&img, &win);
114
115 load_image();
116 img_render(&img, &win);
117 update_title();
118
119 run();
120
121 cleanup();
122
123 return 0;
124}
125
126void update_title() {
127 int n;
128 float size;
129 const char *unit;
130
131 size = filesize;
132 size_readable(&size, &unit);
133
134 n = snprintf(win_title, TITLE_LEN, "sxiv: [%d/%d] <%d%%> (%.2f%s) %s",
135 fileidx + 1, filecnt, (int) (img.zoom * 100.0), size, unit,
136 filenames[fileidx]);
137 if (n >= TITLE_LEN) {
138 win_title[TITLE_LEN - 2] = '.';
139 win_title[TITLE_LEN - 3] = '.';
140 win_title[TITLE_LEN - 4] = '.';
141 }
142
143 win_set_title(&win, win_title);
144}
145
146int check_append(const char *filename) {
147 if (!filename)
148 return 0;
149
150 if (img_check(filename)) {
151 if (fileidx == filecnt) {
152 filecnt *= 2;
153 filenames = (const char**) s_realloc(filenames,
154 filecnt * sizeof(const char*));
155 }
156 filenames[fileidx++] = filename;
157 return 1;
158 } else {
159 return 0;
160 }
161}
162
163void read_dir_rec(const char *dirname) {
164 char *filename;
165 const char **dirnames;
166 int dircnt, diridx;
167 unsigned char first;
168 size_t len;
169 DIR *dir;
170 struct dirent *dentry;
171 struct stat fstats;
172
173 if (!dirname)
174 return;
175
176 dircnt = DNAME_CNT;
177 diridx = first = 1;
178 dirnames = (const char**) s_malloc(dircnt * sizeof(const char*));
179 dirnames[0] = dirname;
180
181 while (diridx > 0) {
182 dirname = dirnames[--diridx];
183 if (!(dir = opendir(dirname))) {
184 warn("could not open directory: %s", dirname);
185 } else {
186 while ((dentry = readdir(dir))) {
187 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
188 continue;
189
190 len = strlen(dirname) + strlen(dentry->d_name) + 2;
191 filename = (char*) s_malloc(len * sizeof(char));
192 snprintf(filename, len, "%s/%s", dirname, dentry->d_name);
193
194 if (!stat(filename, &fstats) && S_ISDIR(fstats.st_mode)) {
195 if (diridx == dircnt) {
196 dircnt *= 2;
197 dirnames = (const char**) s_realloc(dirnames,
198 dircnt * sizeof(const char*));
199 }
200 dirnames[diridx++] = filename;
201 } else {
202 if (!check_append(filename))
203 free(filename);
204 }
205 }
206 closedir(dir);
207 }
208
209 if (!first)
210 free((void*) dirname);
211 else
212 first = 0;
213 }
214
215 free(dirnames);
216}
217
218
219/* event handling */
220
221unsigned char timeout;
222int mox, moy;
223
224void on_keypress(XKeyEvent *kev) {
225 int x, y;
226 unsigned int w, h;
227 char key;
228 KeySym ksym;
229 int changed;
230
231 if (!kev)
232 return;
233
234 XLookupString(kev, &key, 1, &ksym, NULL);
235 changed = 0;
236
237 switch (ksym) {
238 case XK_Escape:
239 cleanup();
240 exit(2);
241 case XK_q:
242 cleanup();
243 exit(0);
244
245 /* navigate image list */
246 case XK_n:
247 case XK_space:
248 if (fileidx + 1 < filecnt) {
249 ++fileidx;
250 changed = load_image();
251 }
252 break;
253 case XK_p:
254 case XK_BackSpace:
255 if (fileidx > 0) {
256 --fileidx;
257 changed = load_image();
258 }
259 break;
260 case XK_bracketleft:
261 if (fileidx != 0) {
262 fileidx = MAX(0, fileidx - 10);
263 changed = load_image();
264 }
265 break;
266 case XK_bracketright:
267 if (fileidx != filecnt - 1) {
268 fileidx = MIN(fileidx + 10, filecnt - 1);
269 changed = load_image();
270 }
271 break;
272 case XK_g:
273 if (fileidx != 0) {
274 fileidx = 0;
275 changed = load_image();
276 }
277 break;
278 case XK_G:
279 if (fileidx != filecnt - 1) {
280 fileidx = filecnt - 1;
281 changed = load_image();
282 }
283 break;
284
285 /* zooming */
286 case XK_plus:
287 case XK_equal:
288 changed = img_zoom_in(&img);
289 break;
290 case XK_minus:
291 changed = img_zoom_out(&img);
292 break;
293 case XK_0:
294 changed = img_zoom(&img, 1.0);
295 break;
296 case XK_w:
297 if ((changed = img_fit_win(&img, &win)))
298 img_center(&img, &win);
299 break;
300
301 /* panning */
302 case XK_h:
303 case XK_Left:
304 changed = img_pan(&img, &win, PAN_LEFT);
305 break;
306 case XK_j:
307 case XK_Down:
308 changed = img_pan(&img, &win, PAN_DOWN);
309 break;
310 case XK_k:
311 case XK_Up:
312 changed = img_pan(&img, &win, PAN_UP);
313 break;
314 case XK_l:
315 case XK_Right:
316 changed = img_pan(&img, &win, PAN_RIGHT);
317 break;
318
319 /* rotation */
320 case XK_less:
321 img_rotate_left(&img, &win);
322 changed = 1;
323 break;
324 case XK_greater:
325 img_rotate_right(&img, &win);
326 changed = 1;
327 break;
328
329 /* control window */
330 case XK_f:
331 win_toggle_fullscreen(&win);
332 /* render on next configurenotify */
333 break;
334 case XK_W:
335 x = win.x + img.x;
336 y = win.y + img.y;
337 w = img.w * img.zoom;
338 h = img.h * img.zoom;
339 if ((changed = win_moveresize(&win, x, y, w, h))) {
340 img.x = x - win.x;
341 img.y = y - win.y;
342 }
343 break;
344
345 /* miscellaneous */
346 case XK_a:
347 img_toggle_antialias(&img);
348 changed = 1;
349 break;
350 case XK_r:
351 changed = load_image();
352 break;
353;
354 }
355
356 if (changed) {
357 img_render(&img, &win);
358 update_title();
359 timeout = 0;
360 }
361}
362
363void on_buttonpress(XButtonEvent *bev) {
364 int changed;
365 unsigned int mask;
366
367 if (!bev)
368 return;
369
370 mask = CLEANMASK(bev->state);
371 changed = 0;
372
373 switch (bev->button) {
374 case Button1:
375 if (fileidx + 1 < filecnt) {
376 ++fileidx;
377 changed = load_image();
378 }
379 break;
380 case Button2:
381 mox = bev->x;
382 moy = bev->y;
383 win_set_cursor(&win, CURSOR_HAND);
384 break;
385 case Button3:
386 if (fileidx > 0) {
387 --fileidx;
388 changed = load_image();
389 }
390 break;
391 case Button4:
392 if (mask == ControlMask)
393 changed = img_zoom_in(&img);
394 else if (mask == ShiftMask)
395 changed = img_pan(&img, &win, PAN_LEFT);
396 else
397 changed = img_pan(&img, &win, PAN_UP);
398 break;
399 case Button5:
400 if (mask == ControlMask)
401 changed = img_zoom_out(&img);
402 else if (mask == ShiftMask)
403 changed = img_pan(&img, &win, PAN_RIGHT);
404 else
405 changed = img_pan(&img, &win, PAN_DOWN);
406 break;
407 case 6:
408 changed = img_pan(&img, &win, PAN_LEFT);
409 break;
410 case 7:
411 changed = img_pan(&img, &win, PAN_RIGHT);
412 break;
413 }
414
415 if (changed) {
416 img_render(&img, &win);
417 update_title();
418 timeout = 0;
419 }
420}
421
422void on_motionnotify(XMotionEvent *mev) {
423 if (!mev)
424 return;
425
426 if (mev->x >= 0 && mev->x <= win.w && mev->y >= 0 && mev->y <= win.h) {
427 if (img_move(&img, &win, mev->x - mox, mev->y - moy))
428 timeout = 1;
429
430 mox = mev->x;
431 moy = mev->y;
432 }
433}
434
435void run() {
436 int xfd;
437 fd_set fds;
438 struct timeval t;
439 XEvent ev;
440
441 timeout = 0;
442
443 while (1) {
444 if (timeout) {
445 t.tv_sec = 0;
446 t.tv_usec = 250;
447 xfd = ConnectionNumber(win.env.dpy);
448 FD_ZERO(&fds);
449 FD_SET(xfd, &fds);
450
451 if (!XPending(win.env.dpy) && !select(xfd + 1, &fds, 0, 0, &t)) {
452 img_render(&img, &win);
453 timeout = 0;
454 }
455 }
456
457 if (!XNextEvent(win.env.dpy, &ev)) {
458 switch (ev.type) {
459 case KeyPress:
460 on_keypress(&ev.xkey);
461 break;
462 case ButtonPress:
463 on_buttonpress(&ev.xbutton);
464 break;
465 case ButtonRelease:
466 if (ev.xbutton.button == Button2)
467 win_set_cursor(&win, CURSOR_ARROW);
468 break;
469 case MotionNotify:
470 on_motionnotify(&ev.xmotion);
471 break;
472 case ConfigureNotify:
473 if (win_configure(&win, &ev.xconfigure)) {
474 img.checkpan = 1;
475 timeout = 1;
476 }
477 break;
478 case ClientMessage:
479 if ((Atom) ev.xclient.data.l[0] == wm_delete_win)
480 return;
481 break;
482 }
483 }
484 }
485}