1 /*
2 *Copyright (C) 2003-2004 Harold L Hunt II All Rights Reserved.
3 *
4 *Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 *"Software"), to deal in the Software without restriction, including
7 *without limitation the rights to use, copy, modify, merge, publish,
8 *distribute, sublicense, and/or sell copies of the Software, and to
9 *permit persons to whom the Software is furnished to do so, subject to
10 *the following conditions:
11 *
12 *The above copyright notice and this permission notice shall be
13 *included in all copies or substantial portions of the Software.
14 *
15 *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
19 *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
20 *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 *
23 *Except as contained in this notice, the name of Harold L Hunt II
24 *shall not be used in advertising or otherwise to promote the sale, use
25 *or other dealings in this Software without prior written authorization
26 *from Harold L Hunt II.
27 *
28 * Authors: Harold L Hunt II
29 */
30
31 #ifdef HAVE_XWIN_CONFIG_H
32 #include <xwin-config.h>
33 #endif
34
35 #include <unistd.h>
36 #include <pthread.h>
37
38 #include "win.h"
39 #include "winclipboard/winclipboard.h"
40 #include "windisplay.h"
41
42 #define WIN_CLIPBOARD_RETRIES 40
43 #define WIN_CLIPBOARD_DELAY 1
44
45 /*
46 * Local variables
47 */
48
49 static pthread_t g_ptClipboardProc;
50
51 /*
52 *
53 */
54 static void *
winClipboardThreadProc(void * arg)55 winClipboardThreadProc(void *arg)
56 {
57 char szDisplay[512];
58 int clipboardRestarts = 0;
59
60 while (1)
61 {
62 Bool fShutdown;
63
64 ++clipboardRestarts;
65
66 /* Use our generated cookie for authentication */
67 winSetAuthorization();
68
69 /* Setup the display connection string */
70 /*
71 * NOTE: Always connect to screen 0 since we require that screen
72 * numbers start at 0 and increase without gaps. We only need
73 * to connect to one screen on the display to get events
74 * for all screens on the display. That is why there is only
75 * one clipboard client thread.
76 */
77 winGetDisplayName(szDisplay, 0);
78
79 /* Print the display connection string */
80 ErrorF("winClipboardThreadProc - DISPLAY=%s\n", szDisplay);
81
82 /* Flag that clipboard client has been launched */
83 g_fClipboardStarted = TRUE;
84
85 fShutdown = winClipboardProc(g_fUnicodeClipboard, szDisplay);
86
87 /* Flag that clipboard client has stopped */
88 g_fClipboardStarted = FALSE;
89
90 if (fShutdown)
91 break;
92
93 /* checking if we need to restart */
94 if (clipboardRestarts >= WIN_CLIPBOARD_RETRIES) {
95 /* terminates clipboard thread but the main server still lives */
96 ErrorF("winClipboardProc - the clipboard thread has restarted %d times and seems to be unstable, disabling clipboard integration\n", clipboardRestarts);
97 g_fClipboard = FALSE;
98 break;
99 }
100
101 sleep(WIN_CLIPBOARD_DELAY);
102 ErrorF("winClipboardProc - trying to restart clipboard thread \n");
103 }
104
105 return NULL;
106 }
107
108 /*
109 * Intialize the Clipboard module
110 */
111
112 Bool
winInitClipboard(void)113 winInitClipboard(void)
114 {
115 winDebug("winInitClipboard ()\n");
116
117 /* Spawn a thread for the Clipboard module */
118 if (pthread_create(&g_ptClipboardProc, NULL, winClipboardThreadProc, NULL)) {
119 /* Bail if thread creation failed */
120 ErrorF("winInitClipboard - pthread_create failed.\n");
121 return FALSE;
122 }
123
124 return TRUE;
125 }
126
127 void
winClipboardShutdown(void)128 winClipboardShutdown(void)
129 {
130 /* Close down clipboard resources */
131 if (g_fClipboard && g_fClipboardStarted) {
132 /* Synchronously destroy the clipboard window */
133 winClipboardWindowDestroy();
134
135 /* Wait for the clipboard thread to exit */
136 pthread_join(g_ptClipboardProc, NULL);
137
138 g_fClipboardStarted = FALSE;
139
140 winDebug("winClipboardShutdown - Clipboard thread has exited.\n");
141 }
142 }
143