void *
winClipboardProc(void *pvNotUsed)
{
Atom atomClipboard, atomClipboardManager;
int iReturn;
HWND hwnd = NULL;
int iConnectionNumber = 0;
#ifdef HAS_DEVWINDOWS
int fdMessageQueue = 0;
#else
struct timeval tvTimeout;
#endif
fd_set fdsRead;
int iMaxDescriptor;
Display *pDisplay = NULL;
Window iWindow = None;
int iRetries;
Bool fUseUnicode;
char szDisplay[512];
int iSelectError;
winDebug("winClipboardProc - Hello\n");
++clipboardRestarts;
/* Do we use Unicode clipboard? */
fUseUnicode = g_fUnicodeClipboard;
/* Save the Unicode support flag in a global */
g_fUseUnicode = fUseUnicode;
/* Allow multiple threads to access Xlib */
if (XInitThreads() == 0) {
ErrorF("winClipboardProc - XInitThreads failed.\n");
goto winClipboardProc_Exit;
}
/* See if X supports the current locale */
if (XSupportsLocale() == False) {
ErrorF("winClipboardProc - Warning: Locale not supported by X.\n");
}
/* Set error handler */
XSetErrorHandler(winClipboardErrorHandler);
g_winClipboardProcThread = pthread_self();
g_winClipboardOldIOErrorHandler =
XSetIOErrorHandler(winClipboardIOErrorHandler);
/* 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);
goto winClipboardProc_Exit;
}
else if (iReturn == WIN_JMP_ERROR_IO) {
/* TODO: Cleanup the Win32 window and free any allocated memory */
ErrorF("winClipboardProc - setjmp returned for IO Error Handler.\n");
pthread_exit(NULL);
}
/* Use our generated cookie for authentication */
winSetAuthorization();
/* Initialize retry count */
iRetries = 0;
/* Setup the display connection string x */
/*
* NOTE: Always connect to screen 0 since we require that screen
* numbers start at 0 and increase without gaps. We only need
* to connect to one screen on the display to get events
* for all screens on the display. That is why there is only
* one clipboard client thread.
*/
snprintf(szDisplay, 512, "127.0.0.1:%s.0", display);
/* 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");
goto winClipboardProc_Done;
}
/* Save the display in the screen privates */
g_pClipboardDisplay = pDisplay;
ErrorF("winClipboardProc - XOpenDisplay () returned and "
"successfully opened the display.\n");
/* Get our connection number */
iConnectionNumber = ConnectionNumber(pDisplay);
#ifdef HAS_DEVWINDOWS
/* 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);
goto winClipboardProc_Done;
}
/* Find max of our file descriptors */
iMaxDescriptor = max(fdMessageQueue, iConnectionNumber) + 1;
#else
iMaxDescriptor = iConnectionNumber + 1;
#endif
/* Create atoms */
atomClipboard = XInternAtom(pDisplay, "CLIPBOARD", False);
atomClipboardManager = XInternAtom(pDisplay, "CLIPBOARD_MANAGER", False);
/* 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 an X window.\n");
goto winClipboardProc_Done;
}
XStoreName(pDisplay, iWindow, "xwinclip");
/* Select event types to watch */
if (XSelectInput(pDisplay, iWindow, PropertyChangeMask) == BadWindow)
ErrorF("winClipboardProc - XSelectInput generated BadWindow "
"on messaging window\n");
/* Save the window in the screen privates */
g_iClipboardWindow = iWindow;
/* Create Windows messaging window */
hwnd = winClipboardCreateMessagingWindow();
/* Save copy of HWND in screen privates */
g_hwndClipboard = hwnd;
/* Assert ownership of selections if Win32 clipboard is owned */
if (NULL != GetClipboardOwner()) {
/* PRIMARY */
iReturn = XSetSelectionOwner(pDisplay, XA_PRIMARY,
iWindow, CurrentTime);
if (iReturn == BadAtom || iReturn == BadWindow ||
XGetSelectionOwner(pDisplay, XA_PRIMARY) != iWindow) {
ErrorF("winClipboardProc - Could not set PRIMARY owner\n");
goto winClipboardProc_Done;
}
/* CLIPBOARD */
iReturn = XSetSelectionOwner(pDisplay, atomClipboard,
iWindow, CurrentTime);
if (iReturn == BadAtom || iReturn == BadWindow ||
XGetSelectionOwner(pDisplay, atomClipboard) != iWindow) {
ErrorF("winClipboardProc - Could not set CLIPBOARD owner\n");
goto winClipboardProc_Done;
}
}
/* 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, iWindow, pDisplay, fUseUnicode);
/* Pre-flush Windows messages */
if (!winClipboardFlushWindowsMessageQueue(hwnd))
return 0;
/* Signal that the clipboard client has started */
g_fClipboardStarted = TRUE;
/* 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(iConnectionNumber, &fdsRead);
#ifdef HAS_DEVWINDOWS
FD_SET(fdMessageQueue, &fdsRead);
#else
tvTimeout.tv_sec = 0;
tvTimeout.tv_usec = 100;
#endif
/* 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 */
#ifdef HAS_DEVWINDOWS
NULL /* No timeout */
#else
&tvTimeout /* Set timeout */
#endif
);
#ifndef HAS_WINSOCK
iSelectError = errno;
#else
iSelectError = WSAGetLastError();
#endif
if (iReturn < 0) {
#ifndef HAS_WINSOCK
if (iSelectError == EINTR)
#else
if (iSelectError == WSAEINTR)
#endif
continue;
ErrorF("winClipboardProc - Call to select () failed: %d. "
"Bailing.\n", iReturn);
break;
}
/* Branch on which descriptor became active */
if (FD_ISSET(iConnectionNumber, &fdsRead)) {
/* Process X events */
/* Exit when we see that server is shutting down */
iReturn = winClipboardFlushXEvents(hwnd,
iWindow, pDisplay, fUseUnicode);
if (WIN_XEVENTS_SHUTDOWN == iReturn) {
ErrorF("winClipboardProc - winClipboardFlushXEvents "
"trapped shutdown event, exiting main loop.\n");
break;
}
}
#ifdef HAS_DEVWINDOWS
/* Check for Windows event ready */
if (FD_ISSET(fdMessageQueue, &fdsRead))
#else
if (1)
#endif
{
/* Process Windows messages */
if (!winClipboardFlushWindowsMessageQueue(hwnd)) {
ErrorF("winClipboardProc - "
"winClipboardFlushWindowsMessageQueue trapped "
"WM_QUIT message, exiting main loop.\n");
break;
}
}
}
winClipboardProc_Exit:
/* disable the clipboard, which means the thread will die */
g_fClipboard = FALSE;
winClipboardProc_Done:
/* Close our Windows window */
if (g_hwndClipboard) {
/* Destroy the Window window (hwnd) */
winDebug("winClipboardProc - Destroy Windows window\n");
PostMessage(g_hwndClipboard, WM_DESTROY, 0, 0);
winClipboardFlushWindowsMessageQueue(g_hwndClipboard);
}
/* Close our X window */
if (pDisplay && iWindow) {
iReturn = XDestroyWindow(pDisplay, iWindow);
if (iReturn == BadWindow)
ErrorF("winClipboardProc - XDestroyWindow returned BadWindow.\n");
else
ErrorF("winClipboardProc - XDestroyWindow succeeded.\n");
}
#ifdef HAS_DEVWINDOWS
/* Close our Win32 message handle */
if (fdMessageQueue)
close(fdMessageQueue);
#endif
#if 0
/*
* FIXME: XCloseDisplay hangs if we call it, as of 2004/03/26. The
* XSync and XSelectInput calls did not help.
*/
/* Discard any remaining events */
XSync(pDisplay, TRUE);
/* Select event types to watch */
XSelectInput(pDisplay, DefaultRootWindow(pDisplay), None);
/* Close our X display */
if (pDisplay) {
XCloseDisplay(pDisplay);
}
#endif
/* global clipboard variable reset */
g_fClipboardLaunched = FALSE;
g_fClipboardStarted = FALSE;
g_iClipboardWindow = None;
g_pClipboardDisplay = NULL;
g_hwndClipboard = NULL;
/* checking if we need to restart */
if (clipboardRestarts >= WIN_CLIPBOARD_RETRIES) {
/* terminates clipboard thread but the main server still lives */
ErrorF
("winClipboardProc - the clipboard thread has restarted %d times and seems to be unstable, disabling clipboard integration\n",
clipboardRestarts);
g_fClipboard = FALSE;
return;
}
if (g_fClipboard) {
sleep(WIN_CLIPBOARD_DELAY);
ErrorF("winClipboardProc - trying to restart clipboard thread \n");
/* Create the clipboard client thread */
if (!winInitClipboard()) {
ErrorF("winClipboardProc - winClipboardInit failed.\n");
return;
}
winDebug("winClipboardProc - winInitClipboard returned.\n");
/* Flag that clipboard client has been launched */
g_fClipboardLaunched = TRUE;
}
else {
ErrorF("winClipboardProc - Clipboard disabled - Exit from server \n");
/* clipboard thread has exited, stop server as well */
kill(getpid(), SIGTERM);
}
return NULL;
}
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;
}