478 lines
12 KiB
C
478 lines
12 KiB
C
/*
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*Copyright (C) 2003-2004 Harold L Hunt II All Rights Reserved.
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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 Harold L Hunt II
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*shall not be used in advertising or otherwise to promote the sale, use
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*or other dealings in this Software without prior written authorization
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*from Harold L Hunt II.
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*
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* Authors: Harold L Hunt II
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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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#endif
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#include <sys/types.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 "X11/Xauth.h"
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/*
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* Constants
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*/
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#define AUTH_NAME "MIT-MAGIC-COOKIE-1"
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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 unsigned long serverGeneration;
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#if defined(XCSECURITY)
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extern unsigned int g_uiAuthDataLen;
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extern char *g_pAuthData;
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#endif
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extern Bool g_fClipboardStarted;
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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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Bool g_fUnicodeSupport = FALSE;
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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, atomClipboardManager;
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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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ErrorF ("winClipboardProc - Hello\n");
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/* Do we have Unicode support? */
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g_fUnicodeSupport = winClipboardDetectUnicodeSupport ();
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/* Do we use Unicode clipboard? */
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fUseUnicode = g_fUnicodeClipboard && g_fUnicodeSupport;
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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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{
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ErrorF ("winClipboardProc - XInitThreads failed.\n");
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pthread_exit (NULL);
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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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{
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ErrorF ("winClipboardProc - Locale not supported by X. Exiting.\n");
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pthread_exit (NULL);
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}
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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
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&& iReturn != WIN_JMP_OKAY)
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{
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/* setjmp returned an unknown value, exit */
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ErrorF ("winClipboardProc - setjmp returned: %d exiting\n",
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iReturn);
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pthread_exit (NULL);
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}
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else if (iReturn == WIN_JMP_ERROR_IO)
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{
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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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#if defined(XCSECURITY)
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/* Use our generated cookie for authentication */
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XSetAuthorization (AUTH_NAME,
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strlen (AUTH_NAME),
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g_pAuthData,
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g_uiAuthDataLen);
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#endif
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/* Set error handler */
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XSetErrorHandler (winClipboardErrorHandler);
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XSetIOErrorHandler (winClipboardIOErrorHandler);
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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,
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512,
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"127.0.0.1:%s.0",
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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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{
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pDisplay = XOpenDisplay (szDisplay);
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if (pDisplay == NULL)
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{
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ErrorF ("winClipboardProc - Could not open display, "
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"try: %d, sleeping: %d\n",
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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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{
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ErrorF ("winClipboardProc - Failed opening the display, giving up\n");
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pthread_exit (NULL);
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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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{
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ErrorF ("winClipboardProc - Failed opening %s\n", WIN_MSG_QUEUE_FNAME);
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pthread_exit (NULL);
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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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/* Select event types to watch */
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if (XSelectInput (pDisplay,
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DefaultRootWindow (pDisplay),
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SubstructureNotifyMask |
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StructureNotifyMask |
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PropertyChangeMask) == BadWindow)
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ErrorF ("winClipboardProc - XSelectInput generated BadWindow "
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"on RootWindow\n\n");
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/* Create atoms */
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atomClipboard = XInternAtom (pDisplay, "CLIPBOARD", False);
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atomClipboardManager = XInternAtom (pDisplay, "CLIPBOARD_MANAGER", 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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{
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ErrorF ("winClipboardProc - Could not create an X window.\n");
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pthread_exit (NULL);
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}
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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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{
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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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{
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ErrorF ("winClipboardProc - Could not set PRIMARY owner\n");
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pthread_exit (NULL);
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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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{
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ErrorF ("winClipboardProc - Could not set CLIPBOARD owner\n");
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pthread_exit (NULL);
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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,
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iWindow,
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pDisplay,
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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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{
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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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{
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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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{
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/* Process X events */
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/* Exit when we see that server is shutting down */
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iReturn = winClipboardFlushXEvents (hwnd,
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iWindow,
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pDisplay,
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fUseUnicode);
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if (WIN_XEVENTS_SHUTDOWN == iReturn)
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{
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ErrorF ("winClipboardProc - winClipboardFlushXEvents "
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"trapped shutdown event, exiting main loop.\n");
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break;
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}
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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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{
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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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/* Close our X window */
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if (pDisplay && iWindow)
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{
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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,
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DefaultRootWindow (pDisplay),
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None);
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/* Close our X display */
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if (pDisplay)
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{
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XCloseDisplay (pDisplay);
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}
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#endif
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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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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,
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pErr->error_code,
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pszErrorMsg,
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sizeof (pszErrorMsg));
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ErrorF ("winClipboardErrorHandler - ERROR: \n\t%s\n"
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"\tSerial: %d, Request Code: %d, Minor Code: %d\n",
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pszErrorMsg,
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pErr->serial,
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pErr->request_code,
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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 ("\nwinClipboardIOErrorHandler!\n\n");
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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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return 0;
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}
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