source: psi/trunk/src/psiapplication.cpp

/*
 * psiapplication.cpp - subclass of QApplication to do some workarounds
 * Copyright (C) 2003  Michail Pishchagin
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "psiapplication.h"

#ifdef Q_WS_MAC
#include<Carbon/Carbon.h>
#endif

#ifdef Q_WS_X11
#include <time.h>
#include <sys/time.h>

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/SM/SMlib.h>

// Atoms required for monitoring the freedesktop.org notification area
static Atom manager_atom = 0;
static Atom tray_selection_atom = 0;
Window root_window = 0;
Window tray_owner = None;

//static Atom atom_KdeNetUserTime;
static Atom kde_net_wm_user_time = 0;

//#if QT_VERSION > 0x030201
//#warning "Possibly, now it's time to clean up some 'focus stealing prevention' workaround code"
//#endif

Time   qt_x_last_input_time = CurrentTime;
//extern Time qt_x_time;

#ifdef KeyPress
#ifndef FIXX11H_KeyPress
#define FIXX11H_KeyPress
const int XKeyPress = KeyPress;
#undef KeyPress
const int KeyPress = XKeyPress;
#endif
#undef KeyPress
#endif
#endif

// mblsha:
// currently this file contains some Anti-"focus steling prevention" code by
// Lubos Lunak (l.lunak@kde.org)
//
// This should resolve all bugs with KWin3 and old Qt, but maybe it'll be useful for
// other window managers?

#ifdef Q_WS_X11
//#undef Q_WS_X11
#endif

#ifdef Q_WS_X11
void setTrayOwnerWindow(Display *dsp)
{
        /* This code is basically trying to mirror what happens in
         * eggtrayicon.c:egg_tray_icon_update_manager_window()
         */
        // ignore events from the old tray owner
        if (tray_owner != None)
        {
                XSelectInput(dsp, tray_owner, 0);
        }

        // obtain the Window handle for the new tray owner
        XGrabServer(dsp);
        tray_owner = XGetSelectionOwner(dsp, tray_selection_atom);

        // we have to be able to spot DestroyNotify messages on the tray owner
        if (tray_owner != None)
        {
                XSelectInput(dsp, tray_owner, StructureNotifyMask|PropertyChangeMask);
        }
        XUngrabServer(dsp);
        XFlush(dsp);
}

#endif

#ifdef Q_WS_PM
// support for the Innotek Font Engine (Freetype 2) library
// (so far, we use it directly here rather than making Qt/2 Freetype2-aware,
// because ft2lib has some problems (e.g. font transformations) that makes it
// dangerous to enable it globally in Qt)
#include <qlibrary.h>
typedef VOID (APIENTRY *Ft2EnableFontEngine_T)( BOOL fEnable );
static Ft2EnableFontEngine_T Ft2EnableFontEngine = 0;
static QLibrary ft2lib( "ft2lib.dll" );
#endif

//----------------------------------------------------------------------------
// PsiApplication
//----------------------------------------------------------------------------

PsiApplication::PsiApplication(int &argc, char **argv, bool GUIenabled)
: QApplication(argc, argv, GUIenabled)
{
        init(GUIenabled);
}

PsiApplication::~PsiApplication()
{
}

void PsiApplication::init(bool GUIenabled)
{
        Q_UNUSED(GUIenabled);
#ifdef Q_WS_PM
        // enable ft2lib when appropriate
        if ( GUIenabled ) {
                Ft2EnableFontEngine =
                        (Ft2EnableFontEngine_T) ft2lib.resolve( "Ft2EnableFontEngine" );
                if ( Ft2EnableFontEngine ) {
                        // enable Innotek Font Engine
                        Ft2EnableFontEngine( TRUE );
                }
        }
#endif
#ifdef Q_WS_X11
        if ( GUIenabled ) {
                const int max = 20;
                Atom* atoms[max];
                char* names[max];
                Atom atoms_return[max];
                int n = 0;

                //atoms[n] = &atom_KdeNetUserTime;
                //names[n++] = (char *) "_KDE_NET_USER_TIME";

                atoms[n] = &kde_net_wm_user_time;
                names[n++] = (char *) "_NET_WM_USER_TIME";
                atoms[n] = &manager_atom;
                names[n++] = (char *) "MANAGER";

                Display *dsp = qt_xdisplay();

                XInternAtoms( dsp, names, n, false, atoms_return );

                for (int i = 0; i < n; i++ )
                        *atoms[i] = atoms_return[i];

                // get the selection type we'll use to locate the notification tray
                char buf[32];
                snprintf(buf, sizeof(buf), "_NET_SYSTEM_TRAY_S%d", XScreenNumberOfScreen( XDefaultScreenOfDisplay(dsp) ));
                tray_selection_atom = XInternAtom(dsp, buf, false);

                // make a note of the window handle for the root window
                root_window = QApplication::desktop()->winId();

                XWindowAttributes attr;

                // this is actually futile, since Qt overrides it at some
                // unknown point in the near future.
                XGetWindowAttributes(dsp, root_window, &attr);
                XSelectInput(dsp, root_window, attr.your_event_mask | StructureNotifyMask);

                setTrayOwnerWindow(dsp);
        }
#endif
}

bool PsiApplication::notify(QObject *receiver, QEvent *event)
{
#ifdef Q_WS_X11
        if( event->type() == QEvent::Show && receiver->isWidgetType())
        {
                QWidget* w = static_cast< QWidget* >( receiver );
                if( w->isTopLevel() && qt_x_last_input_time != CurrentTime ) // CurrentTime means no input event yet
                        XChangeProperty( qt_xdisplay(), w->winId(), kde_net_wm_user_time, XA_CARDINAL,
                                         32, PropModeReplace, (unsigned char*)&qt_x_last_input_time, 1 );
        }
        if( event->type() == QEvent::Hide && receiver->isWidgetType())
        {
                QWidget* w = static_cast< QWidget* >( receiver );
                if( w->isTopLevel() && w->winId() != 0 )
                        XDeleteProperty( qt_xdisplay(), w->winId(), kde_net_wm_user_time );
        }
#endif
        return QApplication::notify(receiver, event);
}

#ifdef Q_WS_X11
bool PsiApplication::x11EventFilter( XEvent *_event )
{
        switch ( _event->type ) {

                case ClientMessage:
                        if (_event->xclient.window == root_window && _event->xclient.message_type == manager_atom)
                        {
                                // A new notification area application has
                                // announced its presence
                                setTrayOwnerWindow(_event->xclient.display);
                                newTrayOwner();
                        }
                        break;
                        
                case DestroyNotify:
                        if (_event->xdestroywindow.event == tray_owner)
                        {
                                // there is now no known notification area.
                                // We're still looking out for the MANAGER
                                // message sent to the root window, at which
                                // point we'll have another look to see
                                // whether a notification area is available.
                                tray_owner = 0;
                                trayOwnerDied();
                        }
                        break;

                case ButtonPress:
                case XKeyPress:
                {
                        if( _event->type == ButtonPress )
                                qt_x_last_input_time = _event->xbutton.time;
                        else // KeyPress
                                qt_x_last_input_time = _event->xkey.time;
                        QWidget *w = activeWindow();
                        if( w ) {
                                XChangeProperty( qt_xdisplay(), w->winId(), kde_net_wm_user_time, XA_CARDINAL,
                                                 32, PropModeReplace, (unsigned char*)&qt_x_last_input_time, 1 );
                                /*timeval tv;
                                gettimeofday( &tv, NULL );
                                unsigned long now = tv.tv_sec * 10 + tv.tv_usec / 100000;
                                XChangeProperty(qt_xdisplay(), w->winId(),
                                                atom_KdeNetUserTime, XA_CARDINAL,
                                                32, PropModeReplace, (unsigned char *)&now, 1);*/
                        }
                        break;
                }

                default:
                        break;
        }

        // process the event normally
        return false;
}
#endif

#ifdef Q_WS_MAC
bool PsiApplication::macEventFilter( EventHandlerCallRef, EventRef inEvent )
{
        UInt32 eclass = GetEventClass(inEvent);
        int etype = GetEventKind(inEvent);
        if(eclass == 'eppc' && etype == kEventAppleEvent) {
                dockActivated();
        }
        return false;
}
#endif