1 files changed, 417 insertions, 0 deletions

diff --git a/src/kernel/qeventloop_x11.cpp b/src/kernel/qeventloop_x11.cpp
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+++ b/src/kernel/qeventloop_x11.cpp
@@ -0,0 +1,417 @@
+/****************************************************************************
+**
+** Implementation of TQEventLoop class
+**
+** Copyright (C) 2000-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of the kernel module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing retquirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at [email protected].
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
+** included in the packaging of this file.  Licensees holding valid TQt
+** Commercial licenses may use this file in accordance with the TQt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#include "qeventloop_p.h" // includes qplatformdefs.h
+#include "qeventloop.h"
+#include "qapplication.h"
+#include "qbitarray.h"
+#include "qcolor_p.h"
+#include "qt_x11_p.h"
+
+#if defined(QT_THREAD_SUPPORT)
+#  include "qmutex.h"
+#endif // QT_THREAD_SUPPORT
+
+#include <errno.h>
+
+
+// resolve the conflict between X11's FocusIn and TQEvent::FocusIn
+#undef FocusOut
+#undef FocusIn
+
+static const int XKeyPress = KeyPress;
+static const int XKeyRelease = KeyRelease;
+#undef KeyPress
+#undef KeyRelease
+
+// from qapplication.cpp
+extern bool qt_is_gui_used;
+
+// from qeventloop_unix.cpp
+extern timeval *qt_wait_timer();
+extern void cleanupTimers();
+
+// ### this needs to go away at some point...
+typedef void (*VFPTR)();
+typedef TQValueList<VFPTR> TQVFuncList;
+void qt_install_preselect_handler( VFPTR );
+void qt_remove_preselect_handler( VFPTR );
+static TQVFuncList *qt_preselect_handler = 0;
+void qt_install_postselect_handler( VFPTR );
+void qt_remove_postselect_handler( VFPTR );
+static TQVFuncList *qt_postselect_handler = 0;
+
+void qt_install_preselect_handler( VFPTR handler )
+{
+    if ( !qt_preselect_handler )
+	qt_preselect_handler = new TQVFuncList;
+    qt_preselect_handler->append( handler );
+}
+void qt_remove_preselect_handler( VFPTR handler )
+{
+    if ( qt_preselect_handler ) {
+	TQVFuncList::Iterator it = qt_preselect_handler->find( handler );
+	if ( it != qt_preselect_handler->end() )
+		qt_preselect_handler->remove( it );
+    }
+}
+void qt_install_postselect_handler( VFPTR handler )
+{
+    if ( !qt_postselect_handler )
+	qt_postselect_handler = new TQVFuncList;
+    qt_postselect_handler->prepend( handler );
+}
+void qt_remove_postselect_handler( VFPTR handler )
+{
+    if ( qt_postselect_handler ) {
+	TQVFuncList::Iterator it = qt_postselect_handler->find( handler );
+	if ( it != qt_postselect_handler->end() )
+		qt_postselect_handler->remove( it );
+    }
+}
+
+
+void TQEventLoop::init()
+{
+    // initialize the common parts of the event loop
+    pipe( d->thread_pipe );
+    fcntl(d->thread_pipe[0], F_SETFD, FD_CLOEXEC);
+    fcntl(d->thread_pipe[1], F_SETFD, FD_CLOEXEC);
+
+    d->sn_highest = -1;
+
+    // intitialize the X11 parts of the event loop
+    d->xfd = -1;
+    if ( qt_is_gui_used )
+        d->xfd = XConnectionNumber( TQPaintDevice::x11AppDisplay() );
+}
+
+void TQEventLoop::cleanup()
+{
+    // cleanup the common parts of the event loop
+    close( d->thread_pipe[0] );
+    close( d->thread_pipe[1] );
+    cleanupTimers();
+
+    // cleanup the X11 parts of the event loop
+    d->xfd = -1;
+}
+
+bool TQEventLoop::processEvents( ProcessEventsFlags flags )
+{
+    // process events from the X server
+    XEvent event;
+    int	   nevents = 0;
+
+#if defined(QT_THREAD_SUPPORT)
+    TQMutexLocker locker( TQApplication::qt_mutex );
+#endif
+
+    // handle gui and posted events
+    if ( qt_is_gui_used ) {
+	TQApplication::sendPostedEvents();
+
+	// Two loops so that posted events accumulate
+	while ( XPending( TQPaintDevice::x11AppDisplay() ) ) {
+	    // also flushes output buffer
+	    while ( XPending( TQPaintDevice::x11AppDisplay() ) ) {
+		if ( d->shortcut ) {
+		    return FALSE;
+		}
+
+		XNextEvent( TQPaintDevice::x11AppDisplay(), &event );
+
+		if ( flags & ExcludeUserInput ) {
+		    switch ( event.type ) {
+		    case ButtonPress:
+		    case ButtonRelease:
+		    case MotionNotify:
+		    case XKeyPress:
+		    case XKeyRelease:
+		    case EnterNotify:
+		    case LeaveNotify:
+			continue;
+
+		    case ClientMessage:
+			{
+			    // from qapplication_x11.cpp
+			    extern Atom qt_wm_protocols;
+			    extern Atom qt_wm_take_focus;
+			    extern Atom qt_qt_scrolldone;
+
+			    // only keep the wm_take_focus and
+			    // qt_qt_scrolldone protocols, discard all
+			    // other client messages
+			    if ( event.xclient.format != 32 )
+				continue;
+
+			    if ( event.xclient.message_type == qt_wm_protocols ||
+				 (Atom) event.xclient.data.l[0] == qt_wm_take_focus )
+				break;
+			    if ( event.xclient.message_type == qt_qt_scrolldone )
+				break;
+			}
+
+		    default: break;
+		    }
+		}
+
+		nevents++;
+		if ( qApp->x11ProcessEvent( &event ) == 1 )
+		    return TRUE;
+	    }
+	}
+    }
+
+    if ( d->shortcut ) {
+	return FALSE;
+    }
+
+    TQApplication::sendPostedEvents();
+
+    const uint exclude_all = ExcludeSocketNotifiers | 0x08;
+    // 0x08 == ExcludeTimers for X11 only
+    if ( nevents > 0 && ( flags & exclude_all ) == exclude_all &&
+	 ( flags & WaitForMore ) ) {
+	return TRUE;
+    }
+
+    // don't block if exitLoop() or exit()/tquit() has been called.
+    bool canWait = d->exitloop || d->tquitnow ? FALSE : (flags & WaitForMore);
+
+    // Process timers and socket notifiers - the common UNIX stuff
+
+    // return the maximum time we can wait for an event.
+    static timeval zerotm;
+    timeval *tm = 0;
+    if ( ! ( flags & 0x08 ) ) {			// 0x08 == ExcludeTimers for X11 only
+	tm = qt_wait_timer();			// wait for timer or X event
+	if ( !canWait ) {
+	    if ( !tm )
+		tm = &zerotm;
+	    tm->tv_sec  = 0;			// no time to wait
+	    tm->tv_usec = 0;
+	}
+    }
+
+    int highest = 0;
+    if ( ! ( flags & ExcludeSocketNotifiers ) ) {
+	// return the highest fd we can wait for input on
+	if ( d->sn_highest >= 0 ) {			// has socket notifier(s)
+	    if ( d->sn_vec[0].list && ! d->sn_vec[0].list->isEmpty() )
+		d->sn_vec[0].select_fds = d->sn_vec[0].enabled_fds;
+	    else
+		FD_ZERO( &d->sn_vec[0].select_fds );
+
+	    if ( d->sn_vec[1].list && ! d->sn_vec[1].list->isEmpty() )
+		d->sn_vec[1].select_fds = d->sn_vec[1].enabled_fds;
+	    else
+		FD_ZERO( &d->sn_vec[1].select_fds );
+
+	    if ( d->sn_vec[2].list && ! d->sn_vec[2].list->isEmpty() )
+		d->sn_vec[2].select_fds = d->sn_vec[2].enabled_fds;
+	    else
+		FD_ZERO( &d->sn_vec[2].select_fds );
+	} else {
+	    FD_ZERO( &d->sn_vec[0].select_fds );
+
+	    FD_ZERO( &d->sn_vec[1].select_fds );
+	    FD_ZERO( &d->sn_vec[2].select_fds );
+	}
+
+	highest = d->sn_highest;
+    } else {
+        FD_ZERO( &d->sn_vec[0].select_fds );
+	FD_ZERO( &d->sn_vec[1].select_fds );
+	FD_ZERO( &d->sn_vec[2].select_fds );
+    }
+
+    if ( qt_is_gui_used ) {
+	// select for events on the event socket - only on X11
+	FD_SET( d->xfd, &d->sn_vec[0].select_fds );
+	highest = TQMAX( highest, d->xfd );
+    }
+
+    FD_SET( d->thread_pipe[0], &d->sn_vec[0].select_fds );
+    highest = TQMAX( highest, d->thread_pipe[0] );
+
+    if ( canWait )
+	emit aboutToBlock();
+
+    if ( qt_preselect_handler ) {
+	TQVFuncList::Iterator it, end = qt_preselect_handler->end();
+	for ( it = qt_preselect_handler->begin(); it != end; ++it )
+	    (**it)();
+    }
+
+    // unlock the GUI mutex and select.  when we return from this function, there is
+    // something for us to do
+#if defined(QT_THREAD_SUPPORT)
+    locker.mutex()->unlock();
+#endif
+
+    int nsel;
+    do {
+	nsel = select( highest + 1,
+		       &d->sn_vec[0].select_fds,
+		       &d->sn_vec[1].select_fds,
+		       &d->sn_vec[2].select_fds,
+		       tm );
+    } while (nsel == -1 && (errno == EINTR || errno == EAGAIN));
+
+    // relock the GUI mutex before processing any pending events
+#if defined(QT_THREAD_SUPPORT)
+    locker.mutex()->lock();
+#endif
+
+    // we are awake, broadcast it
+    emit awake();
+    emit qApp->guiThreadAwake();
+
+    if (nsel == -1) {
+	if (errno == EBADF) {
+	    // it seems a socket notifier has a bad fd... find out
+	    // which one it is and disable it
+	    fd_set fdset;
+	    zerotm.tv_sec = zerotm.tv_usec = 0l;
+
+	    for (int type = 0; type < 3; ++type) {
+		TQPtrList<TQSockNot> *list = d->sn_vec[type].list;
+		if (!list) continue;
+
+		TQSockNot *sn = list->first();
+		while (sn) {
+		    FD_ZERO(&fdset);
+		    FD_SET(sn->fd, &fdset);
+
+		    int ret = -1;
+		    do {
+			switch (type) {
+			case 0: // read
+			    ret = select(sn->fd + 1, &fdset, 0, 0, &zerotm);
+			    break;
+			case 1: // write
+			    ret = select(sn->fd + 1, 0, &fdset, 0, &zerotm);
+			    break;
+			case 2: // except
+			    ret = select(sn->fd + 1, 0, 0, &fdset, &zerotm);
+			    break;
+			}
+		    } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
+
+		    if (ret == -1 && errno == EBADF) {
+			// disable the invalid socket notifier
+			static const char *t[] = { "Read", "Write", "Exception" };
+			qWarning("TQSocketNotifier: invalid socket %d and type '%s', disabling...",
+				 sn->fd, t[type]);
+			sn->obj->setEnabled(FALSE);
+		    }
+
+		    sn = list->next();
+		}
+	    }
+	} else {
+	    // EINVAL... shouldn't happen, so let's complain to stderr
+	    // and hope someone sends us a bug report
+	    perror( "select" );
+	}
+    }
+
+    // some other thread woke us up... consume the data on the thread pipe so that
+    // select doesn't immediately return next time
+    if ( nsel > 0 && FD_ISSET( d->thread_pipe[0], &d->sn_vec[0].select_fds ) ) {
+	char c;
+	::read( d->thread_pipe[0], &c, 1 );
+    }
+
+    if ( qt_postselect_handler ) {
+	TQVFuncList::Iterator it, end = qt_postselect_handler->end();
+	for ( it = qt_postselect_handler->begin(); it != end; ++it )
+	    (**it)();
+    }
+
+    // activate socket notifiers
+    if ( ! ( flags & ExcludeSocketNotifiers ) && nsel > 0 && d->sn_highest >= 0 ) {
+	// if select says data is ready on any socket, then set the socket notifier
+	// to pending
+	int i;
+	for ( i=0; i<3; i++ ) {
+	    if ( ! d->sn_vec[i].list )
+		continue;
+
+	    TQPtrList<TQSockNot> *list = d->sn_vec[i].list;
+	    TQSockNot *sn = list->first();
+	    while ( sn ) {
+		if ( FD_ISSET( sn->fd, &d->sn_vec[i].select_fds ) )
+		    setSocketNotifierPending( sn->obj );
+		sn = list->next();
+	    }
+	}
+
+	nevents += activateSocketNotifiers();
+    }
+
+    // activate timers
+    if ( ! ( flags & 0x08 ) ) {
+	// 0x08 == ExcludeTimers for X11 only
+	nevents += activateTimers();
+    }
+
+    // color approx. optimization - only on X11
+    qt_reset_color_avail();
+
+    // return true if we handled events, false otherwise
+    return (nevents > 0);
+}
+
+bool TQEventLoop::hasPendingEvents() const
+{
+    extern uint qGlobalPostedEventsCount(); // from qapplication.cpp
+    return ( qGlobalPostedEventsCount() || XPending( TQPaintDevice::x11AppDisplay() ) );
+}
+
+void TQEventLoop::appStartingUp()
+{
+    if ( qt_is_gui_used )
+        d->xfd = XConnectionNumber( TQPaintDevice::x11AppDisplay() );
+}
+
+void TQEventLoop::appClosingDown()
+{
+    d->xfd = -1;
+}