468 lines
14 KiB
C
468 lines
14 KiB
C
/*
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*Copyright (C) 2003-2004 Harold L Hunt II All Rights Reserved.
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*Copyright (C) Colin Harrison 2005-2008
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*
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*Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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*"Software"), to deal in the Software without restriction, including
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*without limitation the rights to use, copy, modify, merge, publish,
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*distribute, sublicense, and/or sell copies of the Software, and to
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*permit persons to whom the Software is furnished to do so, subject to
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*the following conditions:
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*
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*The above copyright notice and this permission notice shall be
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*included in all copies or substantial portions of the Software.
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*
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*THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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*EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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*MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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*NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
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*ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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*CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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*WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*Except as contained in this notice, the name of the copyright holder(s)
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*and author(s) shall not be used in advertising or otherwise to promote
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*the sale, use or other dealings in this Software without prior written
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*authorization from the copyright holder(s) and author(s).
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*
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* Authors: Harold L Hunt II
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* Colin Harrison
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*/
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#ifdef HAVE_XWIN_CONFIG_H
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#include <xwin-config.h>
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#else
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#define HAS_WINSOCK 1
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#endif
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#include <sys/types.h>
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#include <signal.h>
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#include "winclipboard.h"
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#ifdef __CYGWIN__
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#include <errno.h>
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#endif
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#include "misc.h"
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/*
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* References to external symbols
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*/
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extern Bool g_fUnicodeClipboard;
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extern Bool g_fClipboardStarted;
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extern Bool g_fClipboardLaunched;
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extern Bool g_fClipboard;
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extern HWND g_hwndClipboard;
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extern void *g_pClipboardDisplay;
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extern Window g_iClipboardWindow;
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/*
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* Global variables
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*/
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static jmp_buf g_jmpEntry;
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static int clipboardRestarts = 0;
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static XIOErrorHandler g_winClipboardOldIOErrorHandler;
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static pthread_t g_winClipboardProcThread;
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Bool g_fUseUnicode = FALSE;
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/*
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* Local function prototypes
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*/
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static int
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winClipboardErrorHandler(Display * pDisplay, XErrorEvent * pErr);
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static int
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winClipboardIOErrorHandler(Display * pDisplay);
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/*
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* Main thread function
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*/
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void *
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winClipboardProc(void *pvNotUsed)
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{
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Atom atomClipboard;
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int iReturn;
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HWND hwnd = NULL;
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int iConnectionNumber = 0;
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#ifdef HAS_DEVWINDOWS
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int fdMessageQueue = 0;
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#else
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struct timeval tvTimeout;
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#endif
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fd_set fdsRead;
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int iMaxDescriptor;
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Display *pDisplay = NULL;
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Window iWindow = None;
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int iRetries;
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Bool fUseUnicode;
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char szDisplay[512];
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int iSelectError;
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winDebug("winClipboardProc - Hello\n");
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++clipboardRestarts;
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/* Do we use Unicode clipboard? */
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fUseUnicode = g_fUnicodeClipboard;
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/* Save the Unicode support flag in a global */
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g_fUseUnicode = fUseUnicode;
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/* Allow multiple threads to access Xlib */
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if (XInitThreads() == 0) {
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ErrorF("winClipboardProc - XInitThreads failed.\n");
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goto winClipboardProc_Exit;
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}
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/* See if X supports the current locale */
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if (XSupportsLocale() == False) {
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ErrorF("winClipboardProc - Warning: Locale not supported by X.\n");
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}
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/* Set error handler */
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XSetErrorHandler(winClipboardErrorHandler);
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g_winClipboardProcThread = pthread_self();
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g_winClipboardOldIOErrorHandler =
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XSetIOErrorHandler(winClipboardIOErrorHandler);
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/* Set jump point for Error exits */
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iReturn = setjmp(g_jmpEntry);
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/* Check if we should continue operations */
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if (iReturn != WIN_JMP_ERROR_IO && iReturn != WIN_JMP_OKAY) {
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/* setjmp returned an unknown value, exit */
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ErrorF("winClipboardProc - setjmp returned: %d exiting\n", iReturn);
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goto winClipboardProc_Exit;
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}
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else if (iReturn == WIN_JMP_ERROR_IO) {
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/* TODO: Cleanup the Win32 window and free any allocated memory */
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ErrorF("winClipboardProc - setjmp returned for IO Error Handler.\n");
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pthread_exit(NULL);
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}
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/* Use our generated cookie for authentication */
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winSetAuthorization();
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/* Initialize retry count */
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iRetries = 0;
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/* Setup the display connection string x */
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/*
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* NOTE: Always connect to screen 0 since we require that screen
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* numbers start at 0 and increase without gaps. We only need
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* to connect to one screen on the display to get events
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* for all screens on the display. That is why there is only
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* one clipboard client thread.
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*/
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snprintf(szDisplay, 512, "127.0.0.1:%s.0", display);
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/* Print the display connection string */
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ErrorF("winClipboardProc - DISPLAY=%s\n", szDisplay);
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/* Open the X display */
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do {
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pDisplay = XOpenDisplay(szDisplay);
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if (pDisplay == NULL) {
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ErrorF("winClipboardProc - Could not open display, "
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"try: %d, sleeping: %d\n", iRetries + 1, WIN_CONNECT_DELAY);
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++iRetries;
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sleep(WIN_CONNECT_DELAY);
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continue;
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}
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else
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break;
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}
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while (pDisplay == NULL && iRetries < WIN_CONNECT_RETRIES);
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/* Make sure that the display opened */
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if (pDisplay == NULL) {
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ErrorF("winClipboardProc - Failed opening the display, giving up\n");
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goto winClipboardProc_Done;
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}
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/* Save the display in the screen privates */
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g_pClipboardDisplay = pDisplay;
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ErrorF("winClipboardProc - XOpenDisplay () returned and "
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"successfully opened the display.\n");
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/* Get our connection number */
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iConnectionNumber = ConnectionNumber(pDisplay);
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#ifdef HAS_DEVWINDOWS
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/* Open a file descriptor for the windows message queue */
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fdMessageQueue = open(WIN_MSG_QUEUE_FNAME, O_RDONLY);
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if (fdMessageQueue == -1) {
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ErrorF("winClipboardProc - Failed opening %s\n", WIN_MSG_QUEUE_FNAME);
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goto winClipboardProc_Done;
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}
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/* Find max of our file descriptors */
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iMaxDescriptor = max(fdMessageQueue, iConnectionNumber) + 1;
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#else
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iMaxDescriptor = iConnectionNumber + 1;
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#endif
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/* Create atom */
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atomClipboard = XInternAtom(pDisplay, "CLIPBOARD", False);
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/* Create a messaging window */
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iWindow = XCreateSimpleWindow(pDisplay,
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DefaultRootWindow(pDisplay),
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1, 1,
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500, 500,
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0,
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BlackPixel(pDisplay, 0),
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BlackPixel(pDisplay, 0));
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if (iWindow == 0) {
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ErrorF("winClipboardProc - Could not create an X window.\n");
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goto winClipboardProc_Done;
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}
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XStoreName(pDisplay, iWindow, "xwinclip");
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/* Select event types to watch */
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if (XSelectInput(pDisplay, iWindow, PropertyChangeMask) == BadWindow)
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ErrorF("winClipboardProc - XSelectInput generated BadWindow "
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"on messaging window\n");
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/* Save the window in the screen privates */
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g_iClipboardWindow = iWindow;
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/* Create Windows messaging window */
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hwnd = winClipboardCreateMessagingWindow();
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/* Save copy of HWND in screen privates */
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g_hwndClipboard = hwnd;
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/* Assert ownership of selections if Win32 clipboard is owned */
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if (NULL != GetClipboardOwner()) {
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/* PRIMARY */
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iReturn = XSetSelectionOwner(pDisplay, XA_PRIMARY,
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iWindow, CurrentTime);
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if (iReturn == BadAtom || iReturn == BadWindow ||
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XGetSelectionOwner(pDisplay, XA_PRIMARY) != iWindow) {
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ErrorF("winClipboardProc - Could not set PRIMARY owner\n");
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goto winClipboardProc_Done;
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}
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/* CLIPBOARD */
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iReturn = XSetSelectionOwner(pDisplay, atomClipboard,
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iWindow, CurrentTime);
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if (iReturn == BadAtom || iReturn == BadWindow ||
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XGetSelectionOwner(pDisplay, atomClipboard) != iWindow) {
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ErrorF("winClipboardProc - Could not set CLIPBOARD owner\n");
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goto winClipboardProc_Done;
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}
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}
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/* Pre-flush X events */
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/*
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* NOTE: Apparently you'll freeze if you don't do this,
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* because there may be events in local data structures
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* already.
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*/
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winClipboardFlushXEvents(hwnd, iWindow, pDisplay, fUseUnicode);
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/* Pre-flush Windows messages */
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if (!winClipboardFlushWindowsMessageQueue(hwnd))
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return 0;
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/* Signal that the clipboard client has started */
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g_fClipboardStarted = TRUE;
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/* Loop for X events */
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while (1) {
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/* Setup the file descriptor set */
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/*
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* NOTE: You have to do this before every call to select
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* because select modifies the mask to indicate
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* which descriptors are ready.
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*/
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FD_ZERO(&fdsRead);
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FD_SET(iConnectionNumber, &fdsRead);
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#ifdef HAS_DEVWINDOWS
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FD_SET(fdMessageQueue, &fdsRead);
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#else
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tvTimeout.tv_sec = 0;
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tvTimeout.tv_usec = 100;
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#endif
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/* Wait for a Windows event or an X event */
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iReturn = select(iMaxDescriptor, /* Highest fds number */
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&fdsRead, /* Read mask */
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NULL, /* No write mask */
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NULL, /* No exception mask */
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#ifdef HAS_DEVWINDOWS
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NULL /* No timeout */
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#else
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&tvTimeout /* Set timeout */
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#endif
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);
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#ifndef HAS_WINSOCK
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iSelectError = errno;
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#else
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iSelectError = WSAGetLastError();
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#endif
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if (iReturn < 0) {
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#ifndef HAS_WINSOCK
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if (iSelectError == EINTR)
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#else
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if (iSelectError == WSAEINTR)
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#endif
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continue;
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ErrorF("winClipboardProc - Call to select () failed: %d. "
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"Bailing.\n", iReturn);
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break;
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}
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/* Branch on which descriptor became active */
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if (FD_ISSET(iConnectionNumber, &fdsRead)) {
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/* Process X events */
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winClipboardFlushXEvents(hwnd, iWindow, pDisplay, fUseUnicode);
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}
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#ifdef HAS_DEVWINDOWS
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/* Check for Windows event ready */
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if (FD_ISSET(fdMessageQueue, &fdsRead))
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#else
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if (1)
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#endif
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{
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/* Process Windows messages */
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if (!winClipboardFlushWindowsMessageQueue(hwnd)) {
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ErrorF("winClipboardProc - "
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"winClipboardFlushWindowsMessageQueue trapped "
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"WM_QUIT message, exiting main loop.\n");
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break;
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}
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}
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}
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winClipboardProc_Exit:
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/* disable the clipboard, which means the thread will die */
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g_fClipboard = FALSE;
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winClipboardProc_Done:
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/* Close our Windows window */
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if (g_hwndClipboard) {
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/* Destroy the Window window (hwnd) */
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winDebug("winClipboardProc - Destroy Windows window\n");
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PostMessage(g_hwndClipboard, WM_DESTROY, 0, 0);
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winClipboardFlushWindowsMessageQueue(g_hwndClipboard);
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}
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/* Close our X window */
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if (pDisplay && iWindow) {
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iReturn = XDestroyWindow(pDisplay, iWindow);
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if (iReturn == BadWindow)
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ErrorF("winClipboardProc - XDestroyWindow returned BadWindow.\n");
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else
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ErrorF("winClipboardProc - XDestroyWindow succeeded.\n");
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}
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#ifdef HAS_DEVWINDOWS
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/* Close our Win32 message handle */
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if (fdMessageQueue)
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close(fdMessageQueue);
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#endif
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#if 0
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/*
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* FIXME: XCloseDisplay hangs if we call it, as of 2004/03/26. The
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* XSync and XSelectInput calls did not help.
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*/
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/* Discard any remaining events */
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XSync(pDisplay, TRUE);
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/* Select event types to watch */
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XSelectInput(pDisplay, DefaultRootWindow(pDisplay), None);
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/* Close our X display */
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if (pDisplay) {
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XCloseDisplay(pDisplay);
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}
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#endif
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/* global clipboard variable reset */
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g_fClipboardLaunched = FALSE;
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g_fClipboardStarted = FALSE;
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g_iClipboardWindow = None;
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g_pClipboardDisplay = NULL;
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g_hwndClipboard = NULL;
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/* checking if we need to restart */
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if (clipboardRestarts >= WIN_CLIPBOARD_RETRIES) {
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/* terminates clipboard thread but the main server still lives */
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ErrorF
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("winClipboardProc - the clipboard thread has restarted %d times and seems to be unstable, disabling clipboard integration\n",
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clipboardRestarts);
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g_fClipboard = FALSE;
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return NULL;
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}
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if (g_fClipboard) {
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sleep(WIN_CLIPBOARD_DELAY);
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ErrorF("winClipboardProc - trying to restart clipboard thread \n");
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/* Create the clipboard client thread */
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if (!winInitClipboard()) {
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ErrorF("winClipboardProc - winClipboardInit failed.\n");
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return NULL;
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}
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winDebug("winClipboardProc - winInitClipboard returned.\n");
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/* Flag that clipboard client has been launched */
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g_fClipboardLaunched = TRUE;
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}
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else {
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ErrorF("winClipboardProc - Clipboard disabled - Exit from server \n");
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/* clipboard thread has exited, stop server as well */
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raise(SIGTERM);
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}
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return NULL;
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}
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/*
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* winClipboardErrorHandler - Our application specific error handler
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*/
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static int
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winClipboardErrorHandler(Display * pDisplay, XErrorEvent * pErr)
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{
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char pszErrorMsg[100];
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XGetErrorText(pDisplay, pErr->error_code, pszErrorMsg, sizeof(pszErrorMsg));
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ErrorF("winClipboardErrorHandler - ERROR: \n\t%s\n"
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"\tSerial: %lu, Request Code: %d, Minor Code: %d\n",
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pszErrorMsg, pErr->serial, pErr->request_code, pErr->minor_code);
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return 0;
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}
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/*
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* winClipboardIOErrorHandler - Our application specific IO error handler
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*/
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static int
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winClipboardIOErrorHandler(Display * pDisplay)
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{
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ErrorF("winClipboardIOErrorHandler!\n");
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if (pthread_equal(pthread_self(), g_winClipboardProcThread)) {
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/* Restart at the main entry point */
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longjmp(g_jmpEntry, WIN_JMP_ERROR_IO);
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}
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if (g_winClipboardOldIOErrorHandler)
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g_winClipboardOldIOErrorHandler(pDisplay);
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return 0;
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}
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