1 | /* |
---|
2 | * neercs console-based window manager |
---|
3 | * Copyright (c) 2006 Sam Hocevar <sam@zoy.org> |
---|
4 | * 2008 Jean-Yves Lamoureux <jylam@lnxscene.org> |
---|
5 | * 2008 Pascal Terjan <pterjan@linuxfr.org> |
---|
6 | * All Rights Reserved |
---|
7 | * |
---|
8 | * $Id: client.c 3939 2009-11-18 14:40:39Z jylam $ |
---|
9 | * |
---|
10 | * This program is free software. It comes without any warranty, to |
---|
11 | * the extent permitted by applicable law. You can redistribute it |
---|
12 | * and/or modify it under the terms of the Do What The Fuck You Want |
---|
13 | * To Public License, Version 2, as published by Sam Hocevar. See |
---|
14 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
---|
15 | */ |
---|
16 | |
---|
17 | #include "config.h" |
---|
18 | |
---|
19 | #include <stdio.h> |
---|
20 | #include <string.h> |
---|
21 | #include <stdlib.h> |
---|
22 | #include <unistd.h> |
---|
23 | #include <fcntl.h> |
---|
24 | #include <signal.h> |
---|
25 | #include <sys/ioctl.h> |
---|
26 | #include <sys/types.h> |
---|
27 | #include <sys/wait.h> |
---|
28 | #include <sys/time.h> |
---|
29 | #include <time.h> |
---|
30 | #include <pwd.h> |
---|
31 | |
---|
32 | #include <errno.h> |
---|
33 | #include <caca.h> |
---|
34 | #include <caca.h> |
---|
35 | |
---|
36 | #include "neercs.h" |
---|
37 | |
---|
38 | #define NEERCS_RECV_BUFSIZE 128*1024 |
---|
39 | |
---|
40 | |
---|
41 | int start_client(struct screen_list * screen_list) |
---|
42 | { |
---|
43 | char *sess = NULL; |
---|
44 | create_socket(screen_list, SOCK_CLIENT); |
---|
45 | while ((sess = connect_socket(screen_list, SOCK_SERVER)) == NULL) |
---|
46 | usleep(100); |
---|
47 | free(sess); |
---|
48 | |
---|
49 | /* Create main canvas and associated caca window */ |
---|
50 | screen_list->cv = caca_create_canvas(0, 0); |
---|
51 | screen_list->dp = caca_create_display(screen_list->cv); |
---|
52 | |
---|
53 | if (!screen_list->dp) |
---|
54 | return -3; |
---|
55 | |
---|
56 | caca_set_display_time(screen_list->dp, screen_list->delay * 1000); |
---|
57 | caca_set_cursor(screen_list->dp, 1); |
---|
58 | |
---|
59 | request_attach(screen_list); |
---|
60 | |
---|
61 | return 0; |
---|
62 | } |
---|
63 | |
---|
64 | |
---|
65 | |
---|
66 | void mainloop(struct screen_list *screen_list) |
---|
67 | { |
---|
68 | char *buf = NULL; |
---|
69 | |
---|
70 | screen_list->last_key_time = get_us(); |
---|
71 | |
---|
72 | for (;;) |
---|
73 | { |
---|
74 | caca_event_t ev; |
---|
75 | int ret = 0; |
---|
76 | ssize_t n; |
---|
77 | if (!screen_list) |
---|
78 | goto end; |
---|
79 | if (!buf) |
---|
80 | buf = malloc(NEERCS_RECV_BUFSIZE); |
---|
81 | if (!buf) |
---|
82 | { |
---|
83 | debug("Failed to allocate memory"); |
---|
84 | goto end; |
---|
85 | } |
---|
86 | if (screen_list->socket[SOCK_CLIENT] |
---|
87 | && (n = |
---|
88 | read(screen_list->socket[SOCK_CLIENT], buf, |
---|
89 | NEERCS_RECV_BUFSIZE - 1)) > 0) |
---|
90 | { |
---|
91 | buf[n] = 0; |
---|
92 | debug("Received from server: %s", buf); |
---|
93 | if (!strncmp("DETACH", buf, 6)) |
---|
94 | { |
---|
95 | ret = 1; |
---|
96 | break; |
---|
97 | } |
---|
98 | else if (!strncmp("UPDATE ", buf, 7)) |
---|
99 | { |
---|
100 | int x, y; |
---|
101 | ssize_t l2 = 0, lb = 0; |
---|
102 | char *buf2; |
---|
103 | size_t l = 0; |
---|
104 | /* FIXME check the length before calling atoi */ |
---|
105 | x = atoi(buf + 8); |
---|
106 | y = atoi(buf + 19); |
---|
107 | /* 0 means we have valid data but incomplete, so read the rest |
---|
108 | */ |
---|
109 | while (l == 0) |
---|
110 | { |
---|
111 | buf2 = realloc(buf, l2 + NEERCS_RECV_BUFSIZE); |
---|
112 | if (!buf2) |
---|
113 | { |
---|
114 | debug("Failed to allocate memory"); |
---|
115 | goto end; |
---|
116 | } |
---|
117 | buf = buf2; |
---|
118 | fcntl(screen_list->socket[SOCK_CLIENT], F_SETFL, 0); |
---|
119 | lb = read(screen_list->socket[SOCK_CLIENT], buf + l2, |
---|
120 | NEERCS_RECV_BUFSIZE - 1); |
---|
121 | if (lb < 0) |
---|
122 | { |
---|
123 | debug |
---|
124 | ("Failed to read the end of the refresh message (%s)", |
---|
125 | strerror(errno)); |
---|
126 | l = -1; |
---|
127 | } |
---|
128 | else |
---|
129 | { |
---|
130 | l2 += lb; |
---|
131 | #if defined HAVE_CACA_DIRTY_RECTANGLES |
---|
132 | l = caca_import_area_from_memory(screen_list->cv, x, y, |
---|
133 | buf, l2, "caca"); |
---|
134 | #else |
---|
135 | l = caca_import_memory(screen_list->cv, buf, l2, |
---|
136 | "caca"); |
---|
137 | #endif |
---|
138 | } |
---|
139 | } |
---|
140 | fcntl(screen_list->socket[SOCK_CLIENT], F_SETFL, O_NONBLOCK); |
---|
141 | } |
---|
142 | else if (!strncmp("REFRESH ", buf, 8)) |
---|
143 | { |
---|
144 | int dt, x, y; |
---|
145 | /* FIXME check the length before calling atoi */ |
---|
146 | x = atoi(buf + 8); |
---|
147 | y = atoi(buf + 19); |
---|
148 | caca_gotoxy(screen_list->cv, x, y); |
---|
149 | caca_refresh_display(screen_list->dp); |
---|
150 | dt = caca_get_display_time(screen_list->dp); |
---|
151 | debug("refreshtime=%dms (limit %d, requested %d)", dt / 1000, |
---|
152 | screen_list->delay, screen_list->requested_delay); |
---|
153 | /* Adjust refresh delay so that the server do not compute |
---|
154 | useless things */ |
---|
155 | if (dt > 2 * 1000 * screen_list->delay |
---|
156 | && screen_list->delay <= 100) |
---|
157 | { |
---|
158 | screen_list->delay *= 2; |
---|
159 | send_delay(screen_list); |
---|
160 | } |
---|
161 | else if (dt < screen_list->delay * 1000 * 1.2 && |
---|
162 | screen_list->delay >= |
---|
163 | 3 * screen_list->requested_delay / 2) |
---|
164 | { |
---|
165 | screen_list->delay = 2 * screen_list->delay / 3; |
---|
166 | send_delay(screen_list); |
---|
167 | } |
---|
168 | } |
---|
169 | else if (!strncmp("CURSOR ", buf, 7)) |
---|
170 | { |
---|
171 | caca_set_cursor(screen_list->dp, atoi(buf + 7)); |
---|
172 | } |
---|
173 | else if (!strncmp("TITLE ", buf, 6)) |
---|
174 | { |
---|
175 | caca_set_display_title(screen_list->dp, buf + 6); |
---|
176 | caca_refresh_display(screen_list->dp); |
---|
177 | } |
---|
178 | else |
---|
179 | { |
---|
180 | debug("Unknown message received from server: %s", buf); |
---|
181 | } |
---|
182 | } |
---|
183 | |
---|
184 | if (ret) |
---|
185 | break; |
---|
186 | |
---|
187 | ret = caca_get_event(screen_list->dp, |
---|
188 | CACA_EVENT_KEY_PRESS |
---|
189 | | CACA_EVENT_RESIZE |
---|
190 | | CACA_EVENT_QUIT, &ev, 10000); |
---|
191 | if (ret) |
---|
192 | ret = send_event(ev, screen_list); |
---|
193 | |
---|
194 | if (ret) |
---|
195 | break; |
---|
196 | } |
---|
197 | |
---|
198 | end: |
---|
199 | if (buf) |
---|
200 | free(buf); |
---|
201 | |
---|
202 | } |
---|