628 lines
22 KiB
C
628 lines
22 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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#endif
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/*
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* Including any server header might define the macro _XSERVER64 on 64 bit machines.
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* That macro must _NOT_ be defined for Xlib client code, otherwise bad things happen.
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* So let's undef that macro if necessary.
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*/
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#ifdef _XSERVER64
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#undef _XSERVER64
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#endif
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#include <sys/types.h>
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#include <sys/time.h>
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#include <limits.h>
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#include <X11/Xatom.h>
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#include "internal.h"
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#include "winclipboard.h"
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/*
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* Constants
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*/
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#define WIN_POLL_TIMEOUT 1
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#ifndef WM_CLIPBOARDUPDATE
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#define WM_CLIPBOARDUPDATE 0x031D
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#endif
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/*
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* Process X events up to specified timeout
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*/
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static int
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winProcessXEventsTimeout(HWND hwnd, Window iWindow, Display * pDisplay,
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ClipboardConversionData *data, ClipboardAtoms *atoms, int iTimeoutSec)
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{
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int iConnNumber;
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struct timeval tv;
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int iReturn;
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DWORD dwStopTime = GetTickCount() + iTimeoutSec * 1000;
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winDebug("winProcessXEventsTimeout () - pumping X events for %d seconds\n",
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iTimeoutSec);
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/* Get our connection number */
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iConnNumber = ConnectionNumber(pDisplay);
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/* Loop for X events */
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while (1) {
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fd_set fdsRead;
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long remainingTime;
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/* Process X events */
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iReturn = winClipboardFlushXEvents(hwnd, iWindow, pDisplay, data, atoms);
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winDebug("winProcessXEventsTimeout () - winClipboardFlushXEvents returned %d\n", iReturn);
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if ((WIN_XEVENTS_NOTIFY_DATA == iReturn) || (WIN_XEVENTS_NOTIFY_TARGETS == iReturn) || (WIN_XEVENTS_FAILED == iReturn)) {
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/* Bail out */
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return iReturn;
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}
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/* We need to ensure that all pending requests are sent */
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XFlush(pDisplay);
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/* Setup the file descriptor set */
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FD_ZERO(&fdsRead);
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FD_SET(iConnNumber, &fdsRead);
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/* Adjust timeout */
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remainingTime = dwStopTime - GetTickCount();
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tv.tv_sec = remainingTime / 1000;
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tv.tv_usec = (remainingTime % 1000) * 1000;
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winDebug("winProcessXEventsTimeout () - %ld milliseconds left\n",
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remainingTime);
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/* Break out if no time left */
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if (remainingTime <= 0)
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return WIN_XEVENTS_SUCCESS;
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/* Wait for an X event */
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iReturn = select(iConnNumber + 1, /* 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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&tv); /* Timeout */
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if (iReturn < 0) {
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ErrorF("winProcessXEventsTimeout - 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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if (!FD_ISSET(iConnNumber, &fdsRead)) {
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winDebug("winProcessXEventsTimeout - Spurious wake, select() returned %d\n", iReturn);
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}
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}
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return WIN_XEVENTS_SUCCESS;
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}
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/*
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* Process a given Windows message
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*/
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LRESULT CALLBACK
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winClipboardWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
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{
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static HWND s_hwndNextViewer;
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static Bool s_fCBCInitialized;
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static Display *pDisplay;
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static Window iWindow;
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static ClipboardAtoms *atoms;
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static Bool fRunning;
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/* Branch on message type */
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switch (message) {
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case WM_DESTROY:
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{
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winDebug("winClipboardWindowProc - WM_DESTROY\n");
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if (g_fHasModernClipboardApi)
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{
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/* Remove clipboard listener */
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g_fpRemoveClipboardFormatListener(hwnd);
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}
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else
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{
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/* Remove ourselves from the clipboard chain */
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ChangeClipboardChain(hwnd, s_hwndNextViewer);
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}
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s_hwndNextViewer = NULL;
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}
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return 0;
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case WM_WM_QUIT:
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{
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winDebug("winClipboardWindowProc - WM_WM_QUIT\n");
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fRunning = FALSE;
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PostQuitMessage(0);
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}
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return 0;
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case WM_CREATE:
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{
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ClipboardWindowCreationParams *cwcp = (ClipboardWindowCreationParams *)((CREATESTRUCT *)lParam)->lpCreateParams;
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winDebug("winClipboardWindowProc - WM_CREATE\n");
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pDisplay = cwcp->pClipboardDisplay;
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iWindow = cwcp->iClipboardWindow;
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atoms = cwcp->atoms;
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fRunning = TRUE;
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if (g_fHasModernClipboardApi)
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{
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g_fpAddClipboardFormatListener(hwnd);
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}
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else
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{
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HWND first, next;
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DWORD error_code = 0;
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first = GetClipboardViewer(); /* Get handle to first viewer in chain. */
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if (first == hwnd)
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return 0; /* Make sure it's not us! */
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/* Add ourselves to the clipboard viewer chain */
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next = SetClipboardViewer(hwnd);
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error_code = GetLastError();
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if (SUCCEEDED(error_code) && (next == first)) /* SetClipboardViewer must have succeeded, and the handle */
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s_hwndNextViewer = next; /* it returned must have been the first window in the chain */
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else
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s_fCBCInitialized = FALSE;
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}
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}
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return 0;
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case WM_CHANGECBCHAIN:
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{
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winDebug("winClipboardWindowProc - WM_CHANGECBCHAIN: wParam(%p) "
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"lParam(%p) s_hwndNextViewer(%p)\n",
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(HWND)wParam, (HWND)lParam, s_hwndNextViewer);
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if ((HWND) wParam == s_hwndNextViewer) {
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s_hwndNextViewer = (HWND) lParam;
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if (s_hwndNextViewer == hwnd) {
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s_hwndNextViewer = NULL;
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ErrorF("winClipboardWindowProc - WM_CHANGECBCHAIN: "
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"attempted to set next window to ourselves.");
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}
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}
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else if (s_hwndNextViewer)
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SendMessage(s_hwndNextViewer, message, wParam, lParam);
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}
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winDebug("winClipboardWindowProc - WM_CHANGECBCHAIN: Exit\n");
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return 0;
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case WM_WM_REINIT:
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{
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/* Ensure that we're in the clipboard chain. Some apps,
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* WinXP's remote desktop for one, don't play nice with the
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* chain. This message is called whenever we receive a
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* WM_ACTIVATEAPP message to ensure that we continue to
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* receive clipboard messages.
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*
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* It might be possible to detect if we're still in the chain
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* by calling SendMessage (GetClipboardViewer(),
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* WM_DRAWCLIPBOARD, 0, 0); and then seeing if we get the
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* WM_DRAWCLIPBOARD message. That, however, might be more
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* expensive than just putting ourselves back into the chain.
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*/
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HWND first, next;
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DWORD error_code = 0;
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winDebug("winClipboardWindowProc - WM_WM_REINIT: Enter\n");
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if (g_fHasModernClipboardApi)
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{
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return 0;
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}
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first = GetClipboardViewer(); /* Get handle to first viewer in chain. */
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if (first == hwnd)
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return 0; /* Make sure it's not us! */
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winDebug(" WM_WM_REINIT: Replacing us(%p) with %p at head "
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"of chain\n", hwnd, s_hwndNextViewer);
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s_fCBCInitialized = FALSE;
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ChangeClipboardChain(hwnd, s_hwndNextViewer);
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s_hwndNextViewer = NULL;
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s_fCBCInitialized = FALSE;
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winDebug(" WM_WM_REINIT: Putting us back at head of chain.\n");
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first = GetClipboardViewer(); /* Get handle to first viewer in chain. */
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if (first == hwnd)
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return 0; /* Make sure it's not us! */
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next = SetClipboardViewer(hwnd);
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error_code = GetLastError();
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if (SUCCEEDED(error_code) && (next == first)) /* SetClipboardViewer must have succeeded, and the handle */
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s_hwndNextViewer = next; /* it returned must have been the first window in the chain */
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else
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s_fCBCInitialized = FALSE;
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}
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winDebug("winClipboardWindowProc - WM_WM_REINIT: Exit\n");
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return 0;
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case WM_DRAWCLIPBOARD:
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case WM_CLIPBOARDUPDATE:
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{
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static Bool s_fProcessingDrawClipboard = FALSE;
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int iReturn;
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if (message == WM_DRAWCLIPBOARD)
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Enter\n");
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else
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winDebug("winClipboardWindowProc - WM_CLIPBOARDUPDATE: Enter\n");
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if (!g_fHasModernClipboardApi)
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{
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/*
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* We've occasionally seen a loop in the clipboard chain.
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* Try and fix it on the first hint of recursion.
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*/
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if (!s_fProcessingDrawClipboard) {
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s_fProcessingDrawClipboard = TRUE;
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}
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else {
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/* Attempt to break the nesting by getting out of the chain, twice?, and then fix and bail */
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s_fCBCInitialized = FALSE;
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ChangeClipboardChain(hwnd, s_hwndNextViewer);
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winFixClipboardChain();
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ErrorF("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
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"Nested calls detected. Re-initing.\n");
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n");
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s_fProcessingDrawClipboard = FALSE;
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return 0;
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}
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/* Bail on first message */
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if (!s_fCBCInitialized) {
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s_fCBCInitialized = TRUE;
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s_fProcessingDrawClipboard = FALSE;
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n");
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return 0;
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}
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}
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/*
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* NOTE: We cannot bail out when NULL == GetClipboardOwner ()
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* because some applications deal with the clipboard in a manner
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* that causes the clipboard owner to be NULL when they are in
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* fact taking ownership. One example of this is the Win32
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* native compile of emacs.
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*/
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/* Bail when we still own the clipboard */
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if (hwnd == GetClipboardOwner()) {
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
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"We own the clipboard, returning.\n");
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n");
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s_fProcessingDrawClipboard = FALSE;
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if (s_hwndNextViewer)
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SendMessage(s_hwndNextViewer, message, wParam, lParam);
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return 0;
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}
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/* Bail when shutting down */
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if (!fRunning)
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return 0;
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/*
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* Do not take ownership of the X11 selections when something
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* other than CF_TEXT or CF_UNICODETEXT has been copied
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* into the Win32 clipboard.
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*/
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if (!IsClipboardFormatAvailable(CF_TEXT)
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&& !IsClipboardFormatAvailable(CF_UNICODETEXT)) {
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
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"Clipboard does not contain CF_TEXT nor "
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"CF_UNICODETEXT.\n");
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/*
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* We need to make sure that the X Server has processed
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* previous XSetSelectionOwner messages.
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*/
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XSync(pDisplay, FALSE);
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winDebug("winClipboardWindowProc - XSync done.\n");
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/* Release PRIMARY selection if owned */
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iReturn = XGetSelectionOwner(pDisplay, XA_PRIMARY);
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if (iReturn == iWindow) {
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
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"PRIMARY selection is owned by us.\n");
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XSetSelectionOwner(pDisplay, XA_PRIMARY, None, CurrentTime);
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}
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else if (BadWindow == iReturn || BadAtom == iReturn)
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ErrorF("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
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"XGetSelectionOwner failed for PRIMARY: %d\n",
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iReturn);
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/* Release CLIPBOARD selection if owned */
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iReturn = XGetSelectionOwner(pDisplay, atoms->atomClipboard);
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if (iReturn == iWindow) {
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
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"CLIPBOARD selection is owned by us, releasing\n");
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XSetSelectionOwner(pDisplay, atoms->atomClipboard, None, CurrentTime);
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}
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else if (BadWindow == iReturn || BadAtom == iReturn)
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ErrorF("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
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"XGetSelectionOwner failed for CLIPBOARD: %d\n",
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iReturn);
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n");
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s_fProcessingDrawClipboard = FALSE;
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if (s_hwndNextViewer)
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SendMessage(s_hwndNextViewer, message, wParam, lParam);
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return 0;
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}
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/* Reassert ownership of PRIMARY */
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iReturn = XSetSelectionOwner(pDisplay,
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XA_PRIMARY, 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("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
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"Could not reassert ownership of PRIMARY\n");
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}
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else {
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
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"Reasserted ownership of PRIMARY\n");
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}
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/* Reassert ownership of the CLIPBOARD */
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iReturn = XSetSelectionOwner(pDisplay,
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atoms->atomClipboard, iWindow, CurrentTime);
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if (iReturn == BadAtom || iReturn == BadWindow ||
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XGetSelectionOwner(pDisplay, atoms->atomClipboard) != iWindow) {
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ErrorF("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
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"Could not reassert ownership of CLIPBOARD\n");
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}
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else {
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD - "
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"Reasserted ownership of CLIPBOARD\n");
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}
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/* Flush the pending SetSelectionOwner event now */
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XFlush(pDisplay);
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s_fProcessingDrawClipboard = FALSE;
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}
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winDebug("winClipboardWindowProc - WM_DRAWCLIPBOARD: Exit\n");
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/* Pass the message on the next window in the clipboard viewer chain */
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if (s_hwndNextViewer)
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SendMessage(s_hwndNextViewer, message, wParam, lParam);
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return 0;
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case WM_DESTROYCLIPBOARD:
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/*
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* NOTE: Intentionally do nothing.
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* Changes in the Win32 clipboard are handled by WM_DRAWCLIPBOARD
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* above. We only process this message to conform to the specs
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* for delayed clipboard rendering in Win32. You might think
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* that we need to release ownership of the X11 selections, but
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* we do not, because a WM_DRAWCLIPBOARD message will closely
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* follow this message and reassert ownership of the X11
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* selections, handling the issue for us.
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*/
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winDebug("winClipboardWindowProc - WM_DESTROYCLIPBOARD - Ignored.\n");
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return 0;
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case WM_RENDERALLFORMATS:
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winDebug("winClipboardWindowProc - WM_RENDERALLFORMATS - Hello.\n");
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/*
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WM_RENDERALLFORMATS is sent as we are shutting down, to render the
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clipboard so it's contents remains available to other applications.
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Unfortunately, this can't work without major changes. The server is
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already waiting for us to stop, so we can't ask for the rendering of
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clipboard text now.
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*/
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return 0;
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case WM_RENDERFORMAT:
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{
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int iReturn;
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Bool fConvertToUnicode;
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Bool pasted = FALSE;
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Atom selection;
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ClipboardConversionData data;
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int best_target = 0;
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winDebug("winClipboardWindowProc - WM_RENDERFORMAT %d - Hello.\n",
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(int)wParam);
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/* Flag whether to convert to Unicode or not */
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fConvertToUnicode = (CF_UNICODETEXT == wParam);
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selection = winClipboardGetLastOwnedSelectionAtom(atoms);
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if (selection == None) {
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ErrorF("winClipboardWindowProc - no monitored selection is owned\n");
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goto fake_paste;
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}
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winDebug("winClipboardWindowProc - requesting targets for selection from owner\n");
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/* Request the selection's supported conversion targets */
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XConvertSelection(pDisplay,
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selection,
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atoms->atomTargets,
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atoms->atomLocalProperty,
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iWindow, CurrentTime);
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/* Process X events */
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data.fUseUnicode = fConvertToUnicode;
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iReturn = winProcessXEventsTimeout(hwnd,
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iWindow,
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pDisplay,
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&data,
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atoms,
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WIN_POLL_TIMEOUT);
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if (WIN_XEVENTS_NOTIFY_TARGETS != iReturn) {
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ErrorF
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("winClipboardWindowProc - timed out waiting for WIN_XEVENTS_NOTIFY_TARGETS\n");
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goto fake_paste;
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}
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|
|
/* Choose the most preferred target */
|
|
{
|
|
struct target_priority
|
|
{
|
|
Atom target;
|
|
unsigned int priority;
|
|
};
|
|
|
|
struct target_priority target_priority_table[] =
|
|
{
|
|
{ atoms->atomCompoundText, 0 },
|
|
#ifdef X_HAVE_UTF8_STRING
|
|
{ atoms->atomUTF8String, 1 },
|
|
#endif
|
|
{ XA_STRING, 2 },
|
|
};
|
|
|
|
int best_priority = INT_MAX;
|
|
|
|
int i,j;
|
|
for (i = 0 ; data.targetList[i] != 0; i++)
|
|
{
|
|
for (j = 0; j < sizeof(target_priority_table)/sizeof(struct target_priority); j ++)
|
|
{
|
|
if ((data.targetList[i] == target_priority_table[j].target) &&
|
|
(target_priority_table[j].priority < best_priority))
|
|
{
|
|
best_target = target_priority_table[j].target;
|
|
best_priority = target_priority_table[j].priority;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
free(data.targetList);
|
|
data.targetList = 0;
|
|
|
|
winDebug("winClipboardWindowProc - best target is %d\n", best_target);
|
|
|
|
/* No useful targets found */
|
|
if (best_target == 0)
|
|
goto fake_paste;
|
|
|
|
winDebug("winClipboardWindowProc - requesting selection from owner\n");
|
|
|
|
/* Request the selection contents */
|
|
XConvertSelection(pDisplay,
|
|
selection,
|
|
best_target,
|
|
atoms->atomLocalProperty,
|
|
iWindow, CurrentTime);
|
|
|
|
/* Process X events */
|
|
iReturn = winProcessXEventsTimeout(hwnd,
|
|
iWindow,
|
|
pDisplay,
|
|
&data,
|
|
atoms,
|
|
WIN_POLL_TIMEOUT);
|
|
|
|
/*
|
|
* winProcessXEventsTimeout had better have seen a notify event,
|
|
* or else we are dealing with a buggy or old X11 app.
|
|
*/
|
|
if (WIN_XEVENTS_NOTIFY_DATA != iReturn) {
|
|
ErrorF
|
|
("winClipboardWindowProc - timed out waiting for WIN_XEVENTS_NOTIFY_DATA\n");
|
|
}
|
|
else {
|
|
pasted = TRUE;
|
|
}
|
|
|
|
/*
|
|
* If we couldn't get the data from the X clipboard, we
|
|
* have to paste some fake data to the Win32 clipboard to
|
|
* satisfy the requirement that we write something to it.
|
|
*/
|
|
fake_paste:
|
|
if (!pasted)
|
|
{
|
|
/* Paste no data, to satisfy required call to SetClipboardData */
|
|
SetClipboardData(CF_UNICODETEXT, NULL);
|
|
SetClipboardData(CF_TEXT, NULL);
|
|
}
|
|
|
|
winDebug("winClipboardWindowProc - WM_RENDERFORMAT - Returning.\n");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Let Windows perform default processing for unhandled messages */
|
|
return DefWindowProc(hwnd, message, wParam, lParam);
|
|
}
|
|
|
|
/*
|
|
* Process any pending Windows messages
|
|
*/
|
|
|
|
Bool
|
|
winClipboardFlushWindowsMessageQueue(HWND hwnd)
|
|
{
|
|
MSG msg;
|
|
|
|
/* Flush the messaging window queue */
|
|
/* NOTE: Do not pass the hwnd of our messaging window to PeekMessage,
|
|
* as this will filter out many non-window-specific messages that
|
|
* are sent to our thread, such as WM_QUIT.
|
|
*/
|
|
while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
|
|
/* Dispatch the message if not WM_QUIT */
|
|
if (msg.message == WM_QUIT)
|
|
return FALSE;
|
|
else
|
|
DispatchMessage(&msg);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|