Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdebase@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 472 insertions, 0 deletions

diff --git a/nsplugins/viewer/qxteventloop.cpp b/nsplugins/viewer/qxteventloop.cpp
new file mode 100644
index 000000000..856cfe67c
--- /dev/null
+++ b/nsplugins/viewer/qxteventloop.cpp
@@ -0,0 +1,472 @@
+/****************************************************************************
+** Implementation of QWidget class
+**
+** Created : 931031
+**
+** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
+**
+** This file is part of the Xt extension of the Qt GUI Toolkit.
+**
+** This file may be distributed under the terms of the Q Public License
+** as defined by Trolltech AS of Norway and appearing in the file
+** LICENSE.QPL included in the packaging of this file.
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.
+**
+** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
+** licenses may use this file in accordance with the Qt Commercial License
+** Agreement provided with the Software.
+**
+** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+**
+** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
+**   information about Qt Commercial License Agreements.
+** See http://www.trolltech.com/qpl/ for QPL licensing information.
+** See http://www.trolltech.com/gpl/ for GPL licensing information.
+**
+** Contact info@trolltech.com if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+#include <config.h>
+
+#include "qxteventloop.h"
+
+#if QT_VERSION >= 0x030100
+
+#include <qapplication.h>
+#include <qwidgetintdict.h>
+#include <kglobal.h>
+
+// resolve the conflict between X11's FocusIn and QEvent::FocusIn
+const int XFocusOut = FocusOut;
+const int XFocusIn = FocusIn;
+#undef FocusOut
+#undef FocusIn
+
+const int XKeyPress = KeyPress;
+const int XKeyRelease = KeyRelease;
+#undef KeyPress
+#undef KeyRelease
+
+Boolean qmotif_event_dispatcher( XEvent *event );
+
+class QXtEventLoopPrivate
+{
+public:
+    QXtEventLoopPrivate();
+
+    void hookMeUp();
+    void unhook();
+
+    XtAppContext appContext, ownContext;
+    QMemArray<XtEventDispatchProc> dispatchers;
+    QWidgetIntDict mapper;
+
+    QIntDict<QSocketNotifier> socknotDict;
+    bool activate_timers;
+    XtIntervalId timerid;
+
+    // arguments for Xt display initialization
+    const char* applicationClass;
+    XrmOptionDescRec* options;
+    int numOptions;
+};
+static QXtEventLoopPrivate *static_d = 0;
+static XEvent* last_xevent = 0;
+
+
+/*! \internal
+  Redeliver the given XEvent to Xt.
+
+  Rationale: An XEvent handled by Qt does not go through the Xt event
+  handlers, and the internal state of Xt/Motif widgets will not be
+  updated.  This function should only be used if an event delivered by
+  Qt to a QWidget needs to be sent to an Xt/Motif widget.
+*/
+bool QXtEventLoop::redeliverEvent( XEvent *event )
+{
+    // redeliver the event to Xt, NOT through Qt
+    if ( static_d->dispatchers[ event->type ]( event ) )
+	return TRUE;
+    return FALSE;
+}
+
+
+/*!\internal
+ */
+XEvent* QXtEventLoop::lastEvent()
+{
+    return last_xevent;
+}
+
+
+QXtEventLoopPrivate::QXtEventLoopPrivate()
+    : appContext(NULL), ownContext(NULL),
+      activate_timers(FALSE), timerid(0)
+{
+}
+
+void QXtEventLoopPrivate::hookMeUp()
+{
+    // worker to plug Qt into Xt (event dispatchers)
+    // and Xt into Qt (QXtEventLoopEventLoop)
+
+    // ### TODO extensions?
+    dispatchers.resize( LASTEvent );
+    dispatchers.fill( 0 );
+    int et;
+    for ( et = 2; et < LASTEvent; et++ )
+	dispatchers[ et ] =
+	    XtSetEventDispatcher( QPaintDevice::x11AppDisplay(),
+				  et, ::qmotif_event_dispatcher );
+}
+
+void QXtEventLoopPrivate::unhook()
+{
+    // unhook Qt from Xt (event dispatchers)
+    // unhook Xt from Qt? (QXtEventLoopEventLoop)
+
+    // ### TODO extensions?
+    int et;
+    for ( et = 2; et < LASTEvent; et++ )
+	(void) XtSetEventDispatcher( QPaintDevice::x11AppDisplay(),
+				     et, dispatchers[ et ] );
+    dispatchers.resize( 0 );
+
+    /*
+      We cannot destroy the app context here because it closes the X
+      display, something QApplication does as well a bit later.
+      if ( ownContext )
+          XtDestroyApplicationContext( ownContext );
+     */
+    appContext = ownContext = 0;
+}
+
+extern bool qt_try_modal( QWidget *, XEvent * ); // defined in qapplication_x11.cpp
+Boolean qmotif_event_dispatcher( XEvent *event )
+{
+    QApplication::sendPostedEvents();
+
+    QWidgetIntDict *mapper = &static_d->mapper;
+    QWidget* qMotif = mapper->find( event->xany.window );
+    if ( !qMotif && QWidget::find( event->xany.window) == 0 ) {
+	// event is not for Qt, try Xt
+	Display* dpy = QPaintDevice::x11AppDisplay();
+	Widget w = XtWindowToWidget( dpy, event->xany.window );
+	while ( w && ! ( qMotif = mapper->find( XtWindow( w ) ) ) ) {
+	    if ( XtIsShell( w ) ) {
+		break;
+	    }
+	    w = XtParent( w );
+	}
+
+	if ( qMotif &&
+	     ( event->type == XKeyPress || event->type == XKeyRelease ) )  {
+	    // remap key events
+	    event->xany.window = qMotif->winId();
+	}
+    }
+
+    last_xevent = event;
+    bool delivered = ( qApp->x11ProcessEvent( event ) != -1 );
+    last_xevent = 0;
+    if ( qMotif ) {
+	switch ( event->type ) {
+	case EnterNotify:
+	case LeaveNotify:
+	    event->xcrossing.focus = False;
+	    delivered = FALSE;
+	    break;
+	case XKeyPress:
+	case XKeyRelease:
+	    delivered = TRUE;
+	    break;
+	case XFocusIn:
+	case XFocusOut:
+	    delivered = FALSE;
+	    break;
+	default:
+	    delivered = FALSE;
+	    break;
+	}
+    }
+
+    if ( delivered )
+	return True;
+
+
+    if ( QApplication::activePopupWidget() )
+	// we get all events through the popup grabs.  discard the event
+	return True;
+
+    if ( qMotif && QApplication::activeModalWidget() ) {
+	if ( !qt_try_modal(qMotif, event) )
+	    return True;
+
+    }
+
+    if ( static_d->dispatchers[ event->type ]( event ) )
+	// Xt handled the event.
+	return True;
+
+    return False;
+}
+
+
+
+/*!
+    \class QXtEventLoop
+    \brief The QXtEventLoop class is the core behind the Motif Extension.
+
+    \extension Motif
+
+    QXtEventLoop only provides a few public functions, but is the brains
+    behind the integration.  QXtEventLoop is responsible for initializing
+    the Xt toolkit and the Xt application context.  It does not open a
+    connection to the X server, this is done by using QApplication.
+
+    The only member function in QXtEventLoop that depends on an X server
+    connection is QXtEventLoop::initialize(). QXtEventLoop must be created before
+    QApplication.
+
+    Example usage of QXtEventLoop and QApplication:
+
+    \code
+    static char *resources[] = {
+	...
+    };
+
+    int main(int argc, char **argv)
+    {
+	QXtEventLoop integrator( "AppClass" );
+	XtAppSetFallbackResources( integrator.applicationContext(),
+				   resources );
+	QApplication app( argc, argv );
+
+	...
+
+	return app.exec();
+    }
+    \endcode
+*/
+
+/*!
+  Creates QXtEventLoop, which allows Qt and Xt/Motif integration.
+
+  If \a context is NULL, QXtEventLoop creates a default application context
+  itself. The context is accessible through applicationContext().
+
+  All arguments passed to this function (\a applicationClass, \a
+  options and \a numOptions) are used to call XtDisplayInitialize()
+  after QApplication has been constructed.
+*/
+
+
+
+QXtEventLoop::QXtEventLoop( const char *applicationClass, XtAppContext context, XrmOptionDescRec *options , int numOptions)
+{
+#if defined(QT_CHECK_STATE)
+    if ( static_d )
+	qWarning( "QXtEventLoop: should only have one QXtEventLoop instance!" );
+#endif
+
+    d = static_d = new QXtEventLoopPrivate;
+    XtToolkitInitialize();
+    if ( context )
+	d->appContext = context;
+    else
+	d->ownContext = d->appContext = XtCreateApplicationContext();
+
+    d->applicationClass = applicationClass;
+    d->options = options;
+    d->numOptions = numOptions;
+}
+
+
+/*!
+  Destroys QXtEventLoop.
+*/
+QXtEventLoop::~QXtEventLoop()
+{
+  //   d->unhook();
+    delete d;
+}
+
+/*!
+  Returns the application context.
+*/
+XtAppContext QXtEventLoop::applicationContext() const
+{
+    return d->appContext;
+}
+
+
+void QXtEventLoop::appStartingUp()
+{
+    int argc = qApp->argc();
+    XtDisplayInitialize( d->appContext,
+			 QPaintDevice::x11AppDisplay(),
+			 qApp->name(),
+			 d->applicationClass,
+			 d->options,
+			 d->numOptions,
+			 &argc,
+			 qApp->argv() );
+    d->hookMeUp();
+}
+
+void QXtEventLoop::appClosingDown()
+{
+    d->unhook();
+}
+
+
+/*!\internal
+ */
+void QXtEventLoop::registerWidget( QWidget* w )
+{
+    if ( !static_d )
+	return;
+    static_d->mapper.insert( w->winId(), w );
+}
+
+
+/*!\internal
+ */
+void QXtEventLoop::unregisterWidget( QWidget* w )
+{
+    if ( !static_d )
+	return;
+    static_d->mapper.remove( w->winId() );
+}
+
+
+/*! \internal
+ */
+void qmotif_socknot_handler( XtPointer pointer, int *, XtInputId *id )
+{
+    QXtEventLoop *eventloop = (QXtEventLoop *) pointer;
+    QSocketNotifier *socknot = static_d->socknotDict.find( *id );
+    if ( ! socknot ) // this shouldn't happen
+	return;
+    eventloop->setSocketNotifierPending( socknot );
+}
+
+/*! \reimp
+ */
+void QXtEventLoop::registerSocketNotifier( QSocketNotifier *notifier )
+{
+    XtInputMask mask;
+    switch ( notifier->type() ) {
+    case QSocketNotifier::Read:
+	mask = XtInputReadMask;
+	break;
+
+    case QSocketNotifier::Write:
+	mask = XtInputWriteMask;
+	break;
+
+    case QSocketNotifier::Exception:
+	mask = XtInputExceptMask;
+	break;
+
+    default:
+	qWarning( "QXtEventLoopEventLoop: socket notifier has invalid type" );
+	return;
+    }
+
+    XtInputId id = XtAppAddInput( d->appContext,
+				  notifier->socket(), (XtPointer) mask,
+				  qmotif_socknot_handler, this );
+    d->socknotDict.insert( id, notifier );
+
+    QEventLoop::registerSocketNotifier( notifier );
+}
+
+/*! \reimp
+ */
+void QXtEventLoop::unregisterSocketNotifier( QSocketNotifier *notifier )
+{
+    QIntDictIterator<QSocketNotifier> it( d->socknotDict );
+    while ( it.current() && notifier != it.current() )
+	++it;
+    if ( ! it.current() ) {
+	// this shouldn't happen
+	qWarning( "QXtEventLoopEventLoop: failed to unregister socket notifier" );
+	return;
+    }
+
+    XtRemoveInput( it.currentKey() );
+    d->socknotDict.remove( it.currentKey() );
+
+    QEventLoop::unregisterSocketNotifier( notifier );
+}
+
+/*! \internal
+ */
+void qmotif_timeout_handler( XtPointer, XtIntervalId * )
+{
+    static_d->activate_timers = TRUE;
+    static_d->timerid = 0;
+}
+
+/*! \reimp
+ */
+bool QXtEventLoop::processEvents( ProcessEventsFlags flags )
+{
+    // Qt uses posted events to do lots of delayed operations, like repaints... these
+    // need to be delivered before we go to sleep
+    QApplication::sendPostedEvents();
+
+    // make sure we fire off Qt's timers
+    int ttw = timeToWait();
+    if ( d->timerid != 0 ) {
+	XtRemoveTimeOut( d->timerid );
+    }
+    d->timerid = 0;
+    if ( ttw != -1 ) {
+	d->timerid =
+	    XtAppAddTimeOut( d->appContext, ttw,
+			     qmotif_timeout_handler, 0 );
+    }
+
+    // get the pending event mask from Xt and process the next event
+    XtInputMask pendingmask = XtAppPending( d->appContext );
+    XtInputMask mask = pendingmask;
+    if ( pendingmask & XtIMTimer ) {
+	mask &= ~XtIMTimer;
+	// zero timers will starve the Xt X event dispatcher... so process
+	// something *instead* of a timer first...
+	if ( mask != 0 )
+	    XtAppProcessEvent( d->appContext, mask );
+	// and process a timer afterwards
+	mask = pendingmask & XtIMTimer;
+    }
+
+    if ( ( flags & WaitForMore ) )
+	XtAppProcessEvent( d->appContext, XtIMAll );
+    else
+	XtAppProcessEvent( d->appContext, mask );
+
+    int nevents = 0;
+    if ( ! ( flags & ExcludeSocketNotifiers ) )
+	nevents += activateSocketNotifiers();
+
+    if ( d->activate_timers ) {
+	nevents += activateTimers();
+    }
+    d->activate_timers = FALSE;
+
+    return ( (flags & WaitForMore) || ( pendingmask != 0 ) || nevents > 0 );
+}
+
+#include "qxteventloop.moc"
+
+#endif
+