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taskmanager.cpp

/*****************************************************************

Copyright (c) 2000 Matthias Elter <elter@kde.org>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

******************************************************************/

#include <kglobal.h>
#include <klocale.h>
#include <kdebug.h>
#include <kconfig.h>
#include <kiconloader.h>
#include <kwinmodule.h>
#include <netwm.h>
#include <qtimer.h>
#include <qimage.h>

#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>

#include "taskmanager.h"
#include "taskmanager.moc"

template class QPtrList<Task>;

// Hack: create a global KWinModule without a parent. We
// can't make it a child of TaskManager because more than one
// TaskManager might be created. We can't make it a class
// variable without changing Task, which also uses it.
// So, we'll leak a little memory, but it's better than crashing.
// The real problem is that KWinModule should be a singleton.
KWinModule* kwin_module = NULL;

TaskManager::TaskManager(QObject *parent, const char *name)
    : QObject(parent, name), _active(0), _startup_info( NULL )
{
    if ( kwin_module == NULL )
        kwin_module = new KWinModule();

    KGlobal::locale()->insertCatalogue("libtaskmanager");
    connect(kwin_module, SIGNAL(windowAdded(WId)), SLOT(windowAdded(WId)));
    connect(kwin_module, SIGNAL(windowRemoved(WId)), SLOT(windowRemoved(WId)));
    connect(kwin_module, SIGNAL(activeWindowChanged(WId)), SLOT(activeWindowChanged(WId)));
    connect(kwin_module, SIGNAL(currentDesktopChanged(int)), SLOT(currentDesktopChanged(int)));
    connect(kwin_module, SIGNAL(windowChanged(WId,unsigned int)), SLOT(windowChanged(WId,unsigned int)));

    // register existing windows
    const QValueList<WId> windows = kwin_module->windows();
    for (QValueList<WId>::ConstIterator it = windows.begin(); it != windows.end(); ++it )
      windowAdded(*it);

    // set active window
    WId win = kwin_module->activeWindow();
    activeWindowChanged(win);

    configure_startup();
}

TaskManager::~TaskManager()
{
    KGlobal::locale()->removeCatalogue("libtaskmanager");
}

void TaskManager::configure_startup()
{
    KConfig c("klaunchrc", true);
    c.setGroup("FeedbackStyle");
    if (!c.readBoolEntry("TaskbarButton", true))
        return;
    _startup_info = new KStartupInfo( KStartupInfo::CleanOnCantDetect, this );
    connect( _startup_info,
        SIGNAL( gotNewStartup( const KStartupInfoId&, const KStartupInfoData& )),
        SLOT( gotNewStartup( const KStartupInfoId&, const KStartupInfoData& )));
    connect( _startup_info,
        SIGNAL( gotStartupChange( const KStartupInfoId&, const KStartupInfoData& )),
        SLOT( gotStartupChange( const KStartupInfoId&, const KStartupInfoData& )));
    connect( _startup_info,
        SIGNAL( gotRemoveStartup( const KStartupInfoId&, const KStartupInfoData& )),
        SLOT( gotRemoveStartup( const KStartupInfoId& )));
    c.setGroup( "TaskbarButtonSettings" );
    _startup_info->setTimeout( c.readUnsignedNumEntry( "Timeout", 30 ));
}

00101 Task* TaskManager::findTask(WId w)
{
    for (Task* t = _tasks.first(); t != 0; t = _tasks.next())
        if (t->window() == w  || t->hasTransient(w))
            return t;
    return 0;
}

void TaskManager::windowAdded(WId w )
{
    NETWinInfo info (qt_xdisplay(),  w, qt_xrootwin(),
                 NET::WMWindowType | NET::WMPid | NET::WMState );

    // ignore NET::Tool and other special window types
    NET::WindowType wType = info.windowType( NET::NormalMask | NET::DesktopMask | NET::DockMask
      | NET::ToolbarMask | NET::MenuMask | NET::DialogMask | NET::OverrideMask
      | NET::TopMenuMask | NET::UtilityMask | NET::SplashMask );
    if ( wType != NET::Normal
        && wType != NET::Override
        && wType != NET::Unknown
        && wType != NET::Dialog
      && wType != NET::Utility)
      return;

    // ignore windows that want to be ignored by the taskbar
    if ((info.state() & NET::SkipTaskbar) != 0) {
        _skiptaskbar_windows.push_front( w ); // remember them though
      return;
    }

    Window transient_for_tmp;
    if (XGetTransientForHint( qt_xdisplay(), (Window) w, &transient_for_tmp )) {
        WId transient_for = (WId) transient_for_tmp;

        // check if it's transient for a skiptaskbar window
        if( _skiptaskbar_windows.contains( transient_for ))
            return;

        // lets see if this is a transient for an existing task
        if( transient_for != qt_xrootwin()
            && transient_for != 0
            && wType != NET::Utility ) {

            Task* t = findTask(transient_for);
            if (t) {
              if (t->window() != w) {
                t->addTransient(w, info);
                    // kdDebug() << "TM: Transient " << w << " added for Task: " << t->window() << endl;
                }
              return;
            }
      }
    }

    Task* t = new Task(w, this);
    _tasks.append(t);

    // kdDebug() << "TM: Task added for WId: " << w << endl;

    emit taskAdded(t);
}

void TaskManager::windowRemoved(WId w )
{
    _skiptaskbar_windows.remove( w );
    // find task
    Task* t = findTask(w);
    if (!t) return;

    if (t->window() == w) {
        _tasks.removeRef(t);

        emit taskRemoved(t);

        if(t == _active) _active = 0;
        delete t;
        //kdDebug() << "TM: Task for WId " << w << " removed." << endl;
    }
    else {
        t->removeTransient( w );
        //kdDebug() << "TM: Transient " << w << " for Task " << t->window() << " removed." << endl;
    }
}

void TaskManager::windowChanged(WId w, unsigned int dirty)
{
    if( dirty & NET::WMState ) {
        NETWinInfo info ( qt_xdisplay(),  w, qt_xrootwin(), NET::WMState );
        if ( (info.state() & NET::SkipTaskbar) != 0 ) {
            windowRemoved( w );
            _skiptaskbar_windows.push_front( w );
            return;
        }
        else {
            _skiptaskbar_windows.remove( w );
            if( !findTask( w ))
                windowAdded( w ); // skipTaskBar state was removed, so add this window
        }
    }

    // check if any state we are interested in is marked dirty
    if(!(dirty & (NET::WMVisibleName|NET::WMName|NET::WMVisibleIconName|NET::WMIconName|NET::WMState
                    |NET::WMIcon|NET::XAWMState|NET::WMDesktop)) )
        return;

    // find task
    Task* t = findTask( w );
    if (!t) return;

    //kdDebug() << "TaskManager::windowChanged " << w << " " << dirty << endl;

    if( dirty & NET::WMState )
        t->updateDemandsAttentionState( w );

    // refresh icon pixmap if necessary
    if (dirty & NET::WMIcon)
        t->refresh(true);
    else
        t->refresh();

    if(dirty & (NET::WMDesktop|NET::WMState|NET::XAWMState))
        emit windowChanged(w); // moved to different desktop or is on all or change in iconification/withdrawnnes
}

void TaskManager::activeWindowChanged(WId w )
{
    //kdDebug() << "TaskManager::activeWindowChanged" << endl;

    Task* t = findTask( w );
    if (!t) {
        if (_active) {
            _active->setActive(false);
            _active = 0;
        }
    }
    else {
        if (_active)
            _active->setActive(false);

        _active = t;
        _active->setActive(true);
    }
}

void TaskManager::currentDesktopChanged(int desktop)
{
    emit desktopChanged(desktop);
}

void TaskManager::gotNewStartup( const KStartupInfoId& id, const KStartupInfoData& data )
{
    Startup* s = new Startup( id, data, this );
    _startups.append(s);

    emit startupAdded(s);
}

void TaskManager::gotStartupChange( const KStartupInfoId& id, const KStartupInfoData& data )
{
    for( Startup* s = _startups.first(); s != 0; s = _startups.next()) {
        if ( s->id() == id ) {
            s->update( data );
            return;
        }
    }
}

void TaskManager::gotRemoveStartup( const KStartupInfoId& id )
{
    killStartup( id );
}

void TaskManager::killStartup( const KStartupInfoId& id )
{
    Startup* s = 0;
    for(s = _startups.first(); s != 0; s = _startups.next()) {
        if (s->id() == id)
            break;
    }
    if (s == 0) return;

    _startups.removeRef(s);
    emit startupRemoved(s);
    delete s;
}

void TaskManager::killStartup(Startup* s)
{
    if (s == 0) return;

    _startups.removeRef(s);
    emit startupRemoved(s);
    delete s;
}

00296 QString TaskManager::desktopName(int desk) const
{
    return kwin_module->desktopName(desk);
}

int TaskManager::numberOfDesktops() const
{
    return kwin_module->numberOfDesktops();
}

00306 bool TaskManager::isOnTop(const Task* task)
{
    if(!task) return false;

    for (QValueList<WId>::ConstIterator it = kwin_module->stackingOrder().fromLast();
         it != kwin_module->stackingOrder().end(); --it ) {
      for (Task* t = _tasks.first(); t != 0; t = _tasks.next() ) {
          if ( (*it) == t->window() ) {
            if ( t == task )
                return true;
            if ( !t->isIconified() && (t->isAlwaysOnTop() == task->isAlwaysOnTop()) )
                return false;
            break;
          }
      }
    }
    return false;
}

Task::Task(WId win, TaskManager * parent, const char *name)
  : QObject(parent, name),
    _active(false), _win(win),
    _lastWidth(0), _lastHeight(0), _lastResize(false), _lastIcon(),
    _thumbSize(0.2), _thumb(), _grab()
{
    _info = KWin::windowInfo(_win);

    // try to load icon via net_wm
    _pixmap = KWin::icon(_win, 16, 16, true);

    // try to guess the icon from the classhint
    if(_pixmap.isNull())
      KGlobal::instance()->iconLoader()->loadIcon(className().lower(),
                                      KIcon::Small,KIcon::Small,
                                      KIcon::DefaultState, 0, true);

    // load xapp icon
    if (_pixmap.isNull())
      _pixmap = SmallIcon("kcmx");
}

Task::~Task()
{
}

void Task::refresh(bool icon)
{
    _info = KWin::windowInfo(_win);
    if (icon) {

        // try to load icon via net_wm
        _pixmap = KWin::icon(_win, 16, 16, true);

        // try to guess the icon from the classhint
        if(_pixmap.isNull())
            KGlobal::instance()->iconLoader()->loadIcon(className().lower(), KIcon::Small,
                                                        KIcon::Small, KIcon::DefaultState, 0, true);

        // load xapp icon
        if (_pixmap.isNull())
            _pixmap = SmallIcon("kcmx");

      _lastIcon.resize(0,0);
      emit iconChanged();
    }
    emit changed(); // always changed ?  ... :(
}

void Task::setActive(bool a)
{
    _active = a;
    emit changed();
    if ( a )
      emit activated();
    else
      emit deactivated();
}

00384 bool Task::isMaximized() const
{
    return(_info.state() & NET::Max);
}

00389 bool Task::isMinimized() const
{
    return _info.isMinimized();
}

00394 bool Task::isIconified() const
{
    return _info.isMinimized();
}

00399 bool Task::isAlwaysOnTop() const
{
    return (_info.state() & NET::StaysOnTop);
}

00404 bool Task::isShaded() const
{
    return (_info.state() & NET::Shaded);
}

00409 bool Task::isOnCurrentDesktop() const
{
    return (_info.isOnCurrentDesktop());
}

00414 bool Task::isOnAllDesktops() const
{
    return _info.onAllDesktops();
}

00419 bool Task::isActive() const
{
    return _active;
}

00424 bool Task::isOnTop() const
{
    return taskManager()->isOnTop( this );
}

00429 bool Task::isModified() const
{
  static QString modStr = QString::fromUtf8("[") + i18n("modified") + QString::fromUtf8("]");
  int modStrPos = _info.visibleName().find(modStr);

  return ( modStrPos != -1 );
}

bool Task::demandsAttention() const
{
    return (_info.state() & NET::DemandsAttention)
        || _transients_demanding_attention.count() > 0;
}

void Task::updateDemandsAttentionState( WId w )
{
    if( window() != w ) { // 'w' is a transient for this task
        NETWinInfo i( qt_xdisplay(), w, qt_xrootwin(), NET::WMState );
        if( i.state() & NET::DemandsAttention ) {
            if( !_transients_demanding_attention.contains( w )) {
                _transients_demanding_attention.append( w );
            }
        } else {
            _transients_demanding_attention.remove( w );
        }
    }
}

void Task::addTransient( WId w, const NETWinInfo& info )
{
    _transients.append( w );
    if( info.state() & NET::DemandsAttention )
        {
        _transients_demanding_attention.append( w );
        emit changed();
        }
}

void Task::removeTransient( WId w )
{
    _transients.remove( w );
    _transients_demanding_attention.remove( w );
}

QString Task::className()
{
    XClassHint hint;
    if(XGetClassHint(qt_xdisplay(), _win, &hint)) {
      QString nh( hint.res_name );
      XFree( hint.res_name );
      XFree( hint.res_class );
      return nh;
    }
    return QString::null;
}

QString Task::classClass()
{
    XClassHint hint;
    if(XGetClassHint(qt_xdisplay(), _win, &hint)) {
      QString ch( hint.res_class );
      XFree( hint.res_name );
      XFree( hint.res_class );
      return ch;
    }
    return QString::null;
}

00497 QPixmap Task::icon( int width, int height, bool allowResize )
{
  if ( (width == _lastWidth)
       && (height == _lastHeight)
       && (allowResize == _lastResize )
       && (!_lastIcon.isNull()) )
    return _lastIcon;

  QPixmap newIcon = KWin::icon( _win, width, height, allowResize );
  if ( !newIcon.isNull() ) {
    _lastIcon = newIcon;
    _lastWidth = width;
    _lastHeight = height;
    _lastResize = allowResize;
  }

  return newIcon;
}

00516 QPixmap Task::bestIcon( int size, bool &isStaticIcon )
{
  QPixmap pixmap;
  isStaticIcon = false;

  switch( size ) {
  case KIcon::SizeSmall:
    {
      pixmap = icon( 16, 16, true  );

      // Icon of last resort
      if( pixmap.isNull() ) {
      pixmap = KGlobal::iconLoader()->loadIcon( "go",
                                      KIcon::NoGroup,
                                      KIcon::SizeSmall );
      isStaticIcon = true;
      }
    }
    break;
  case KIcon::SizeMedium:
    {
      //
      // Try 34x34 first for KDE 2.1 icons with shadows, if we don't
      // get one then try 32x32.
      //
      pixmap = icon( 34, 34, false  );

      if ( ( pixmap.width() != 34 ) || ( pixmap.height() != 34 ) ) {
      if ( ( pixmap.width() != 32 ) || ( pixmap.height() != 32 ) ) {
        pixmap = icon( 32, 32, true  );
      }
      }

      // Icon of last resort
      if( pixmap.isNull() ) {
      pixmap = KGlobal::iconLoader()->loadIcon( "go",
                                      KIcon::NoGroup,
                                      KIcon::SizeMedium );
      isStaticIcon = true;
      }
    }
    break;
  case KIcon::SizeLarge:
    {
      // If there's a 48x48 icon in the hints then use it
      pixmap = icon( size, size, false  );

      // If not, try to get one from the classname
      if ( pixmap.isNull() || pixmap.width() != size || pixmap.height() != size ) {
      pixmap = KGlobal::iconLoader()->loadIcon( className(),
                                      KIcon::NoGroup,
                                      size,
                                      KIcon::DefaultState,
                                      0L,
                                      true );
      isStaticIcon = true;
      }

      // If we still don't have an icon then scale the one in the hints
      if ( pixmap.isNull() || ( pixmap.width() != size ) || ( pixmap.height() != size ) ) {
      pixmap = icon( size, size, true  );
      isStaticIcon = false;
      }

      // Icon of last resort
      if( pixmap.isNull() ) {
      pixmap = KGlobal::iconLoader()->loadIcon( "go",
                                      KIcon::NoGroup,
                                      size );
      isStaticIcon = true;
      }
    }
  }

  return pixmap;
}

00593 bool Task::idMatch( const QString& id1, const QString& id2 )
{
  if ( id1.isEmpty() || id2.isEmpty() )
    return false;

  if ( id1.contains( id2 ) > 0 )
    return true;

  if ( id2.contains( id1 ) > 0 )
    return true;

  return false;
}


00608 void Task::maximize()
{
    KWin::WindowInfo info = KWin::windowInfo( _win, NET::WMState | NET::XAWMState | NET::WMDesktop );
    bool on_current = info.isOnCurrentDesktop();
    if( !on_current )
        KWin::setCurrentDesktop( info.desktop());
    if( info.isMinimized())
        KWin::deIconifyWindow( _win );
    NETWinInfo ni( qt_xdisplay(),  _win, qt_xrootwin(), NET::WMState );
    ni.setState( NET::Max, NET::Max );
    if( !on_current )
        KWin::forceActiveWindow( _win );
}

00622 void Task::restore()
{
    KWin::WindowInfo info = KWin::windowInfo( _win, NET::WMState | NET::XAWMState | NET::WMDesktop );
    bool on_current = info.isOnCurrentDesktop();
    if( !on_current )
        KWin::setCurrentDesktop( info.desktop());
    if( info.isMinimized())
        KWin::deIconifyWindow( _win );
    NETWinInfo ni( qt_xdisplay(),  _win, qt_xrootwin(), NET::WMState );
    ni.setState( 0, NET::Max );
    if( !on_current )
        KWin::forceActiveWindow( _win );
}

00636 void Task::iconify()
{
    KWin::iconifyWindow( _win );
}

00641 void Task::close()
{
    NETRootInfo ri( qt_xdisplay(),  NET::CloseWindow );
    ri.closeWindowRequest( _win );
}

00647 void Task::raise()
{
//    kdDebug(1210) << "Task::raise(): " << name() << endl;
    KWin::raiseWindow( _win );
}

00653 void Task::lower()
{
//    kdDebug(1210) << "Task::lower(): " << name() << endl;
    KWin::lowerWindow( _win );
}

00659 void Task::activate()
{
//    kdDebug(1210) << "Task::activate():" << name() << endl;
    WId w = _win;
    if( _transients_demanding_attention.count() > 0 )
        w = _transients_demanding_attention.last();
    KWin::forceActiveWindow( w );
}

00668 void Task::activateRaiseOrIconify()
{
    if ( !isActive() || isIconified() ) {
        activate();
    } else if ( !isOnTop() ) {
       raise();
    } else {
       iconify();
    }
}

00679 void Task::toDesktop(int desk)
{
    NETWinInfo ni(qt_xdisplay(), _win, qt_xrootwin(), NET::WMDesktop);
    if (desk == 0) {
        if (_info.onAllDesktops()) {
            ni.setDesktop(kwin_module->currentDesktop());
            KWin::forceActiveWindow(_win);
        }
        else
            ni.setDesktop(NETWinInfo::OnAllDesktops);
        return;
    }
    ni.setDesktop(desk);
    if(desk == kwin_module->currentDesktop())
        KWin::forceActiveWindow(_win);
}

00696 void Task::toCurrentDesktop()
{
    toDesktop(kwin_module->currentDesktop());
}

00701 void Task::setAlwaysOnTop(bool stay)
{
    NETWinInfo ni( qt_xdisplay(),  _win, qt_xrootwin(), NET::WMState);
    if(stay)
        ni.setState( NET::StaysOnTop, NET::StaysOnTop );
    else
        ni.setState( 0, NET::StaysOnTop );
}

void Task::toggleAlwaysOnTop()
{
    setAlwaysOnTop( !isAlwaysOnTop() );
}

00715 void Task::setShaded(bool shade)
{
    NETWinInfo ni( qt_xdisplay(),  _win, qt_xrootwin(), NET::WMState);
    if(shade)
        ni.setState( NET::Shaded, NET::Shaded );
    else
        ni.setState( 0, NET::Shaded );
}

void Task::toggleShaded()
{
    setShaded( !isShaded() );
}

00729 void Task::publishIconGeometry(QRect rect)
{
    NETWinInfo ni( qt_xdisplay(),  _win, qt_xrootwin(), 0 );
    NETRect r;
    r.pos.x = rect.x();
    r.pos.y = rect.y();
    r.size.width = rect.width();
    r.size.height = rect.height();
    ni.setIconGeometry(r);
}

00740 void Task::updateThumbnail()
{
  if ( !isOnCurrentDesktop() )
    return;
  if ( !isActive() )
    return;
  if ( !_grab.isNull() ) // We're already processing one...
    return;

   //
   // We do this as a two stage process to remove the delay caused
   // by the thumbnail generation. This makes things much smoother
   // on slower machines.
   //
  QWidget *rootWin = qApp->desktop();
  QRect geom = _info.geometry();
   _grab = QPixmap::grabWindow( rootWin->winId(),
                        geom.x(), geom.y(),
                        geom.width(), geom.height() );

   if ( !_grab.isNull() )
     QTimer::singleShot( 200, this, SLOT( generateThumbnail() ) );
}

void Task::generateThumbnail()
{
   if ( _grab.isNull() )
      return;

   QImage img = _grab.convertToImage();

   double width = img.width();
   double height = img.height();
   width = width * _thumbSize;
   height = height * _thumbSize;

   img = img.smoothScale( qRound(width), qRound(height) );
   _thumb = img;
   _grab.resize( 0, 0 ); // Makes grab a null image.

   emit thumbnailChanged();
}

Startup::Startup( const KStartupInfoId& id, const KStartupInfoData& data,
    QObject * parent, const char *name)
    : QObject(parent, name), _id( id ), _data( data )
{
}

Startup::~Startup()
{

}

void Startup::update( const KStartupInfoData& data )
{
    _data.update( data );
    emit changed();
}

int TaskManager::currentDesktop() const
{
    return kwin_module->currentDesktop();
}

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