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xserver/hw/xwin/winclipboardthread.c

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/*
*Copyright (C) 1994-2000 The XFree86 Project, Inc. All Rights Reserved.
*
*Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
*"Software"), to deal in the Software without restriction, including
*without limitation the rights to use, copy, modify, merge, publish,
*distribute, sublicense, and/or sell copies of the Software, and to
*permit persons to whom the Software is furnished to do so, subject to
*the following conditions:
*
*The above copyright notice and this permission notice shall be
*included in all copies or substantial portions of the Software.
*
*THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
*EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
*MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
*NONINFRINGEMENT. IN NO EVENT SHALL THE XFREE86 PROJECT BE LIABLE FOR
*ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
*CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
*WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*Except as contained in this notice, the name of the XFree86 Project
*shall not be used in advertising or otherwise to promote the sale, use
*or other dealings in this Software without prior written authorization
*from the XFree86 Project.
*
* Authors: Harold L Hunt II
*/
/* $XFree86: xc/programs/Xserver/hw/xwin/winclipboardthread.c,v 1.3 2003/10/02 13:30:10 eich Exp $ */
#include "winclipboard.h"
/*
* References to external symbols
*/
extern Bool g_fCalledSetLocale;
/*
* Global variables
*/
static jmp_buf g_jmpEntry;
static Bool g_shutdown = FALSE;
/*
* Local function prototypes
*/
static int
winClipboardErrorHandler (Display *pDisplay, XErrorEvent *pErr);
static int
winClipboardIOErrorHandler (Display *pDisplay);
/*
* Main thread function
*/
void *
winClipboardProc (void *pArg)
{
Atom atomClipboard, atomClipboardManager;
Atom atomLocalProperty, atomCompoundText;
Atom atomUTF8String, atomTargets;
int iReturn;
HWND hwnd = NULL;
int iConnectionNumber;
int fdMessageQueue;
fd_set fdsRead;
int iMaxDescriptor;
Display *pDisplay;
Window iWindow;
Atom atomDeleteWindow;
Bool fReturn;
int iRetries;
Bool fUnicodeSupport;
char szDisplay[512];
ClipboardProcArgPtr pProcArg = (ClipboardProcArgPtr) pArg;
ErrorF ("winClipboardProc - Hello\n");
/* Check that argument pointer is not invalid */
if (pArg == NULL)
{
ErrorF ("winClipboardProc - pArg is NULL, bailing.\n");
pthread_exit (NULL);
}
ErrorF ("winClipboardProc - Calling pthread_mutex_lock ()\n");
/* Grab the server started mutex - pause until we get it */
iReturn = pthread_mutex_lock (pProcArg->ppmServerStarted);
if (iReturn != 0)
{
ErrorF ("winClipboardProc - pthread_mutex_lock () failed: %d\n",
iReturn);
pthread_exit (NULL);
}
ErrorF ("winClipboardProc - pthread_mutex_lock () returned.\n");
/* Do we have Unicode support? */
fUnicodeSupport = winClipboardDetectUnicodeSupport ();
/* Set the current locale? What does this do? */
if (fUnicodeSupport && !g_fCalledSetLocale)
{
ErrorF ("winClipboardProc - Calling setlocale ()\n");
if (!setlocale (LC_ALL, ""))
{
ErrorF ("winClipboardProc - setlocale () error\n");
pthread_exit (NULL);
}
ErrorF ("winClipboardProc - setlocale () returned\n");
/* See if X supports the current locale */
if (XSupportsLocale () == False)
{
ErrorF ("winClipboardProc - Locale not supported by X\n");
pthread_exit (NULL);
}
}
/* Flag that we have called setlocale */
g_fCalledSetLocale = TRUE;
/* Allow multiple threads to access Xlib */
if (XInitThreads () == 0)
{
ErrorF ("winClipboardProc - XInitThreads failed.\n");
pthread_exit (NULL);
}
ErrorF ("winClipboardProc - XInitThreads () returned.\n");
/* Release the server started mutex */
pthread_mutex_unlock (pProcArg->ppmServerStarted);
ErrorF ("winClipboardProc - pthread_mutex_unlock () returned.\n");
/* Set jump point for Error exits */
iReturn = setjmp (g_jmpEntry);
/* Check if we should continue operations */
if (iReturn != WIN_JMP_ERROR_IO
&& iReturn != WIN_JMP_OKAY)
{
/* setjmp returned an unknown value, exit */
ErrorF ("winClipboardProc - setjmp returned: %d exiting\n",
iReturn);
pthread_exit (NULL);
}
else if (g_shutdown)
{
/* Shutting down, the X server severed out connection! */
ErrorF ("winClipboardProc - Detected shutdown in progress\n");
pthread_exit (NULL);
}
else if (iReturn == WIN_JMP_ERROR_IO)
{
ErrorF ("winClipboardProc - setjmp returned and hwnd: %08x\n", hwnd);
}
/* Initialize retry count */
iRetries = 0;
/* Setup the display connection string x */
snprintf (szDisplay,
512,
"127.0.0.1:%s.%d",
display,
(int) pProcArg->dwScreen);
/* Print the display connection string */
ErrorF ("winClipboardProc - DISPLAY=%s\n", szDisplay);
/* Open the X display */
do
{
pDisplay = XOpenDisplay (szDisplay);
if (pDisplay == NULL)
{
ErrorF ("winClipboardProc - Could not open display, "
"try: %d, sleeping: %d\n",
iRetries + 1, WIN_CONNECT_DELAY);
++iRetries;
sleep (WIN_CONNECT_DELAY);
continue;
}
else
break;
}
while (pDisplay == NULL && iRetries < WIN_CONNECT_RETRIES);
/* Make sure that the display opened */
if (pDisplay == NULL)
{
ErrorF ("winClipboardProc - Failed opening the display, giving up\n");
pthread_exit (NULL);
}
ErrorF ("winClipboardProc - XOpenDisplay () returned and "
"successfully opened the display.\n");
/* Create Windows messaging window */
hwnd = winClipboardCreateMessagingWindow ();
/* Get our connection number */
iConnectionNumber = ConnectionNumber (pDisplay);
/* Open a file descriptor for the windows message queue */
fdMessageQueue = open (WIN_MSG_QUEUE_FNAME, O_RDONLY);
if (fdMessageQueue == -1)
{
ErrorF ("winClipboardProc - Failed opening %s\n", WIN_MSG_QUEUE_FNAME);
pthread_exit (NULL);
}
/* Find max of our file descriptors */
iMaxDescriptor = max (fdMessageQueue, iConnectionNumber) + 1;
/* Select event types to watch */
if (XSelectInput (pDisplay,
DefaultRootWindow (pDisplay),
SubstructureNotifyMask |
StructureNotifyMask |
PropertyChangeMask) == BadWindow)
ErrorF ("winClipboardProc - XSelectInput generated BadWindow "
"on RootWindow\n\n");
/* Create a messaging window */
iWindow = XCreateSimpleWindow (pDisplay,
DefaultRootWindow (pDisplay),
1, 1,
500, 500,
0,
BlackPixel (pDisplay, 0),
BlackPixel (pDisplay, 0));
if (iWindow == 0)
{
ErrorF ("winClipboardProc - Could not create a window\n");
pthread_exit (NULL);
}
/* This looks like our only hope for getting a message before shutdown */
/* Register for WM_DELETE_WINDOW message from window manager */
atomDeleteWindow = XInternAtom (pDisplay, "WM_DELETE_WINDOW", False);
XSetWMProtocols (pDisplay, iWindow, &atomDeleteWindow, 1);
/* Set error handler */
XSetErrorHandler (winClipboardErrorHandler);
XSetIOErrorHandler (winClipboardIOErrorHandler);
/* Create an atom for CLIPBOARD_MANAGER */
atomClipboardManager = XInternAtom (pDisplay, "CLIPBOARD_MANAGER", False);
if (atomClipboardManager == None)
{
ErrorF ("winClipboardProc - Could not create CLIPBOARD_MANAGER atom\n");
pthread_exit (NULL);
}
/* Assert ownership of CLIPBOARD_MANAGER */
iReturn = XSetSelectionOwner (pDisplay, atomClipboardManager,
iWindow, CurrentTime);
if (iReturn == BadAtom || iReturn == BadWindow)
{
ErrorF ("winClipboardProc - Could not set CLIPBOARD_MANAGER owner\n");
pthread_exit (NULL);
}
/* Create an atom for CLIPBOARD */
atomClipboard = XInternAtom (pDisplay, "CLIPBOARD", False);
if (atomClipboard == None)
{
ErrorF ("winClipboardProc - Could not create CLIPBOARD atom\n");
pthread_exit (NULL);
}
/* Assert ownership of CLIPBOARD */
iReturn = XSetSelectionOwner (pDisplay, atomClipboard,
iWindow, CurrentTime);
if (iReturn == BadAtom || iReturn == BadWindow)
{
ErrorF ("winClipboardProc - Could not set CLIPBOARD owner\n");
pthread_exit (NULL);
}
/* Assert ownership of PRIMARY */
iReturn = XSetSelectionOwner (pDisplay, XA_PRIMARY,
iWindow, CurrentTime);
if (iReturn == BadAtom || iReturn == BadWindow)
{
ErrorF ("winClipboardProc - Could not set PRIMARY owner\n");
pthread_exit (NULL);
}
/* Local property to hold pasted data */
atomLocalProperty = XInternAtom (pDisplay, "CYGX_CUT_BUFFER", False);
if (atomLocalProperty == None)
{
ErrorF ("winClipboardProc - Could not create CYGX_CUT_BUFFER atom\n");
pthread_exit (NULL);
}
/* Create an atom for UTF8_STRING */
atomUTF8String = XInternAtom (pDisplay, "UTF8_STRING", False);
if (atomUTF8String == None)
{
ErrorF ("winClipboardProc - Could not create UTF8_STRING atom\n");
pthread_exit (NULL);
}
/* Create an atom for COMPOUND_TEXT */
atomCompoundText = XInternAtom (pDisplay, "COMPOUND_TEXT", False);
if (atomCompoundText == None)
{
ErrorF ("winClipboardProc - Could not create COMPOUND_TEXT atom\n");
pthread_exit (NULL);
}
/* Create an atom for TARGETS */
atomTargets = XInternAtom (pDisplay, "TARGETS", False);
if (atomTargets == None)
{
ErrorF ("winClipboardProc - Could not create TARGETS atom\n");
pthread_exit (NULL);
}
/* Pre-flush X events */
/*
* NOTE: Apparently you'll freeze if you don't do this,
* because there may be events in local data structures
* already.
*/
winClipboardFlushXEvents (hwnd,
atomClipboard,
atomLocalProperty,
atomUTF8String,
atomCompoundText,
atomTargets,
atomDeleteWindow,
iWindow,
pDisplay,
fUnicodeSupport);
/* Pre-flush Windows messages */
if (!winClipboardFlushWindowsMessageQueue (hwnd))
return 0;
/* Loop for X events */
while (1)
{
/* Setup the file descriptor set */
/*
* NOTE: You have to do this before every call to select
* because select modifies the mask to indicate
* which descriptors are ready.
*/
FD_ZERO (&fdsRead);
FD_SET (fdMessageQueue, &fdsRead);
FD_SET (iConnectionNumber, &fdsRead);
/* Wait for a Windows event or an X event */
iReturn = select (iMaxDescriptor, /* Highest fds number */
&fdsRead, /* Read mask */
NULL, /* No write mask */
NULL, /* No exception mask */
NULL); /* No timeout */
if (iReturn <= 0)
{
ErrorF ("winClipboardProc - Call to select () failed: %d. "
"Bailing.\n", iReturn);
break;
}
/* Branch on which descriptor became active */
if (FD_ISSET (iConnectionNumber, &fdsRead))
{
/* X event ready */
#if 0
ErrorF ("winClipboardProc - X event ready\n");
#endif
/* Process X events */
/* Exit when we see that server is shutting down */
fReturn = winClipboardFlushXEvents (hwnd,
atomClipboard,
atomLocalProperty,
atomUTF8String,
atomCompoundText,
atomTargets,
atomDeleteWindow,
iWindow,
pDisplay,
fUnicodeSupport);
if (!fReturn)
{
ErrorF ("winClipboardProc - Caught WM_DELETE_WINDOW - "
"shutting down\n");
break;
}
}
/* Check for Windows event ready */
if (FD_ISSET (fdMessageQueue, &fdsRead))
{
/* Windows event ready */
#if 0
ErrorF ("winClipboardProc - Windows event ready\n");
#endif
/* Process Windows messages */
if (!winClipboardFlushWindowsMessageQueue (hwnd))
break;
}
}
return 0;
}
/*
* winClipboardErrorHandler - Our application specific error handler
*/
static int
winClipboardErrorHandler (Display *pDisplay, XErrorEvent *pErr)
{
char pszErrorMsg[100];
XGetErrorText (pDisplay,
pErr->error_code,
pszErrorMsg,
sizeof (pszErrorMsg));
ErrorF ("winClipboardErrorHandler - ERROR: \n\t%s\n", pszErrorMsg);
if (pErr->error_code == BadWindow
|| pErr->error_code == BadMatch
|| pErr->error_code == BadDrawable)
{
#if 0
pthread_exit (NULL);
#endif
}
#if 0
pthread_exit (NULL);
#endif
return 0;
}
/*
* winClipboardIOErrorHandler - Our application specific IO error handler
*/
static int
winClipboardIOErrorHandler (Display *pDisplay)
{
printf ("\nwinClipboardIOErrorHandler!\n\n");
/* Restart at the main entry point */
longjmp (g_jmpEntry, WIN_JMP_ERROR_IO);
return 0;
}
/*
* Notify the clipboard thread we're exiting and not to reconnect
*/
void
winDeinitClipboard ()
{
ErrorF ("winDeinitClipboard - Noting shutdown in progress\n");
g_shutdown = TRUE;
}
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