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nsxivmain.c

178 lines · 3.4 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
22#include <X11/Xlib.h>
23#include <X11/keysym.h>
24
25#include "sxiv.h"
26#include "image.h"
27#include "options.h"
28#include "window.h"
29
30void on_keypress(XEvent*);
31void on_configurenotify(XEvent*);
32void on_expose(XEvent*);
33
34void update_title();
35
36static void (*handler[LASTEvent])(XEvent*) = {
37 [Expose] = on_expose,
38 [ConfigureNotify] = on_configurenotify,
39 [KeyPress] = on_keypress
40};
41
42img_t img;
43win_t win;
44
45const char **filenames;
46unsigned int filecnt;
47unsigned int fileidx;
48
49#define TITLE_LEN 256
50char win_title[TITLE_LEN];
51
52void run() {
53 XEvent ev;
54
55 while (!XNextEvent(win.env.dpy, &ev)) {
56 if (handler[ev.type])
57 handler[ev.type](&ev);
58 }
59}
60
61int main(int argc, char **argv) {
62 int i;
63
64 parse_options(argc, argv);
65
66 if (!options->filecnt) {
67 print_usage();
68 exit(1);
69 }
70
71 if (!(filenames = (const char**) malloc(options->filecnt * sizeof(char*))))
72 DIE("could not allocate memory");
73
74 fileidx = 0;
75 filecnt = 0;
76
77 for (i = 0; i < options->filecnt; ++i) {
78 if (!(img_load(&img, options->filenames[i]) < 0))
79 filenames[filecnt++] = options->filenames[i];
80 }
81
82 if (!filecnt) {
83 fprintf(stderr, "sxiv: no valid image filename given, aborting\n");
84 exit(1);
85 }
86
87 img.zoom = 1.0;
88 img.scalemode = SCALE_MODE;
89
90 win.w = WIN_WIDTH;
91 win.h = WIN_HEIGHT;
92
93 win_open(&win);
94 imlib_init(&win);
95
96 img_load(&img, filenames[fileidx]);
97 img_display(&img, &win);
98 update_title();
99
100 run();
101
102 cleanup();
103
104 return 0;
105}
106
107void cleanup() {
108 static int in = 0;
109
110 if (!in++) {
111 imlib_destroy();
112 win_close(&win);
113 }
114}
115
116void on_keypress(XEvent *ev) {
117 KeySym keysym;
118
119 if (!ev)
120 return;
121
122 keysym = XLookupKeysym(&ev->xkey, 0);
123
124 switch (keysym) {
125 case XK_Escape:
126 cleanup();
127 exit(1);
128 case XK_q:
129 cleanup();
130 exit(0);
131 case XK_n:
132 case XK_space:
133 if (fileidx + 1 < filecnt) {
134 img_load(&img, filenames[++fileidx]);
135 img_display(&img, &win);
136 update_title();
137 }
138 break;
139 case XK_p:
140 case XK_BackSpace:
141 if (fileidx > 0) {
142 img_load(&img, filenames[--fileidx]);
143 img_display(&img, &win);
144 update_title();
145 }
146 break;
147 }
148}
149
150void on_configurenotify(XEvent *ev) {
151 if (!ev)
152 return;
153
154 win_configure(&win, &ev->xconfigure);
155}
156
157void on_expose(XEvent *ev) {
158 if (!ev)
159 return;
160
161 img_render(&img, &win, ev->xexpose.x, ev->xexpose.y,
162 ev->xexpose.width, ev->xexpose.height);
163}
164
165void update_title() {
166 int n;
167
168 n = snprintf(win_title, TITLE_LEN, "sxiv: [%d/%d] <%d%%> %s", fileidx + 1,
169 filecnt, (int) (img.zoom * 100.0), filenames[fileidx]);
170
171 if (n >= TITLE_LEN) {
172 win_title[TITLE_LEN - 2] = '.';
173 win_title[TITLE_LEN - 3] = '.';
174 win_title[TITLE_LEN - 4] = '.';
175 }
176
177 win_set_title(&win, win_title);
178}