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