activation.cpp

00001 /*****************************************************************
00002  KWin - the KDE window manager
00003  This file is part of the KDE project.
00004 
00005 Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
00006 Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org>
00007 
00008 You can Freely distribute this program under the GNU General Public
00009 License. See the file "COPYING" for the exact licensing terms.
00010 ******************************************************************/
00011 
00012 /*
00013 
00014  This file contains things relevant to window activation and focus
00015  stealing prevention.
00016 
00017 */
00018 
00019 #include "client.h"
00020 #include "workspace.h"
00021 
00022 #include <fixx11h.h>
00023 #include <qpopupmenu.h>
00024 #include <kxerrorhandler.h>
00025 #include <kstartupinfo.h>
00026 #include <kstringhandler.h>
00027 #include <klocale.h>
00028 
00029 #include "notifications.h"
00030 #include "atoms.h"
00031 #include "group.h"
00032 #include "rules.h"
00033 
00034 extern Time qt_x_time;
00035 
00036 namespace KWinInternal
00037 {
00038 
00039 /*
00040  Prevention of focus stealing:
00041 
00042  KWin tries to prevent unwanted changes of focus, that would result
00043  from mapping a new window. Also, some nasty applications may try
00044  to force focus change even in cases when ICCCM 4.2.7 doesn't allow it
00045  (e.g. they may try to activate their main window because the user
00046  definitely "needs" to see something happened - misusing
00047  of QWidget::setActiveWindow() may be such case).
00048 
00049  There are 4 ways how a window may become active:
00050  - the user changes the active window (e.g. focus follows mouse, clicking
00051    on some window's titlebar) - the change of focus will
00052    be done by KWin, so there's nothing to solve in this case
00053  - the change of active window will be requested using the _NET_ACTIVE_WINDOW
00054    message (handled in RootInfo::changeActiveWindow()) - such requests
00055    will be obeyed, because this request is meant mainly for e.g. taskbar
00056    asking the WM to change the active window as a result of some user action.
00057    Normal applications should use this request only rarely in special cases.
00058    See also below the discussion of _NET_ACTIVE_WINDOW_TRANSFER.
00059  - the change of active window will be done by performing XSetInputFocus()
00060    on a window that's not currently active. ICCCM 4.2.7 describes when
00061    the application may perform change of input focus. In order to handle
00062    misbehaving applications, KWin will try to detect focus changes to
00063    windows that don't belong to currently active application, and restore
00064    focus back to the currently active window, instead of activating the window
00065    that got focus (unfortunately there's no way to FocusChangeRedirect similar
00066    to e.g. SubstructureRedirect, so there will be short time when the focus
00067    will be changed). The check itself that's done is
00068    Workspace::allowClientActivation() (see below).
00069  - a new window will be mapped - this is the most complicated case. If
00070    the new window belongs to the currently active application, it may be safely
00071    mapped on top and activated. The same if there's no active window,
00072    or the active window is the desktop. These checks are done by
00073    Workspace::allowClientActivation().
00074     Following checks need to compare times. One time is the timestamp
00075    of last user action in the currently active window, the other time is
00076    the timestamp of the action that originally caused mapping of the new window
00077    (e.g. when the application was started). If the first time is newer than
00078    the second one, the window will not be activated, as that indicates
00079    futher user actions took place after the action leading to this new
00080    mapped window. This check is done by Workspace::allowClientActivation().
00081     There are several ways how to get the timestamp of action that caused
00082    the new mapped window (done in Client::readUserTimeMapTimestamp()) :
00083      - the window may have the _NET_WM_USER_TIME property. This way
00084        the application may either explicitly request that the window is not
00085        activated (by using 0 timestamp), or the property contains the time
00086        of last user action in the application.
00087      - KWin itself tries to detect time of last user action in every window,
00088        by watching KeyPress and ButtonPress events on windows. This way some
00089        events may be missed (if they don't propagate to the toplevel window),
00090        but it's good as a fallback for applications that don't provide
00091        _NET_WM_USER_TIME, and missing some events may at most lead
00092        to unwanted focus stealing.
00093      - the timestamp may come from application startup notification.
00094        Application startup notification, if it exists for the new mapped window,
00095        should include time of the user action that caused it.
00096      - if there's no timestamp available, it's checked whether the new window
00097        belongs to some already running application - if yes, the timestamp
00098        will be 0 (i.e. refuse activation)
00099      - if the window is from session restored window, the timestamp will
00100        be 0 too, unless this application was the active one at the time
00101        when the session was saved, in which case the window will be
00102        activated if there wasn't any user interaction since the time
00103        KWin was started.
00104      - as the last resort, the _KDE_NET_USER_CREATION_TIME timestamp
00105        is used. For every toplevel window that is created (see CreateNotify
00106        handling), this property is set to the at that time current time.
00107        Since at this time it's known that the new window doesn't belong
00108        to any existing application (better said, the application doesn't
00109        have any other window mapped), it is either the very first window
00110        of the application, or its the only window of the application
00111        that was hidden before. The latter case is handled by removing
00112        the property from windows before withdrawing them, making
00113        the timestamp empty for next mapping of the window. In the sooner
00114        case, the timestamp will be used. This helps in case when
00115        an application is launched without application startup notification,
00116        it creates its mainwindow, and starts its initialization (that
00117        may possibly take long time). The timestamp used will be older
00118        than any user action done after launching this application.
00119      - if no timestamp is found at all, the window is activated.
00120     The check whether two windows belong to the same application (same
00121    process) is done in Client::belongToSameApplication(). Not 100% reliable,
00122    but hopefully 99,99% reliable.
00123 
00124  As a somewhat special case, window activation is always enabled when
00125  session saving is in progress. When session saving, the session
00126  manager allows only one application to interact with the user.
00127  Not allowing window activation in such case would result in e.g. dialogs
00128  not becoming active, so focus stealing prevention would cause here
00129  more harm than good.
00130 
00131  Windows that attempted to become active but KWin prevented this will
00132  be marked as demanding user attention. They'll get
00133  the _NET_WM_STATE_DEMANDS_ATTENTION state, and the taskbar should mark
00134  them specially (blink, etc.). The state will be reset when the window
00135  eventually really becomes active.
00136 
00137  There are one more ways how a window can become obstrusive, window stealing
00138  focus: By showing above the active window, by either raising itself,
00139  or by moving itself on the active desktop.
00140      - KWin will refuse raising non-active window above the active one,
00141          unless they belong to the same application. Applications shouldn't
00142          raise their windows anyway (unless the app wants to raise one
00143          of its windows above another of its windows).
00144      - KWin activates windows moved to the current desktop (as that seems
00145          logical from the user's point of view, after sending the window
00146          there directly from KWin, or e.g. using pager). This means
00147          applications shouldn't send their windows to another desktop
00148          (SELI TODO - but what if they do?)
00149 
00150  Special cases I can think of:
00151     - konqueror reusing, i.e. kfmclient tells running Konqueror instance
00152         to open new window
00153         - without focus stealing prevention - no problem
00154         - with ASN (application startup notification) - ASN is forwarded,
00155             and because it's newer than the instance's user timestamp,
00156             it takes precedence
00157         - without ASN - user timestamp needs to be reset, otherwise it would
00158             be used, and it's old; moreover this new window mustn't be detected
00159             as window belonging to already running application, or it wouldn't
00160             be activated - see Client::sameAppWindowRoleMatch() for the (rather ugly)
00161             hack
00162     - konqueror preloading, i.e. window is created in advance, and kfmclient
00163         tells this Konqueror instance to show it later
00164         - without focus stealing prevention - no problem
00165         - with ASN - ASN is forwarded, and because it's newer than the instance's
00166             user timestamp, it takes precedence
00167         - without ASN - user timestamp needs to be reset, otherwise it would
00168             be used, and it's old; also, creation timestamp is changed to
00169             the time the instance starts (re-)initializing the window,
00170             this ensures creation timestamp will still work somewhat even in this case
00171     - KUniqueApplication - when the window is already visible, and the new instance
00172         wants it to activate
00173         - without focus stealing prevention - _NET_ACTIVE_WINDOW - no problem
00174         - with ASN - ASN is forwarded, and set on the already visible window, KWin
00175             treats the window as new with that ASN
00176         - without ASN - _NET_ACTIVE_WINDOW as application request is used,
00177                 and there's no really usable timestamp, only timestamp
00178                 from the time the (new) application instance was started,
00179                 so KWin will activate the window *sigh*
00180                 - the bad thing here is that there's absolutely no chance to recognize
00181                     the case of starting this KUniqueApp from Konsole (and thus wanting
00182                     the already visible window to become active) from the case
00183                     when something started this KUniqueApp without ASN (in which case
00184                     the already visible window shouldn't become active)
00185                 - the only solution is using ASN for starting applications, at least silent
00186                     (i.e. without feedback)
00187     - when one application wants to activate another application's window (e.g. KMail
00188         activating already running KAddressBook window ?)
00189         - without focus stealing prevention - _NET_ACTIVE_WINDOW - no problem
00190         - with ASN - can't be here, it's the KUniqueApp case then
00191         - without ASN - _NET_ACTIVE_WINDOW as application request should be used,
00192             KWin will activate the new window depending on the timestamp and
00193             whether it belongs to the currently active application
00194 
00195  _NET_ACTIVE_WINDOW usage:
00196  data.l[0]= 1 ->app request
00197           = 2 ->pager request
00198           = 0 - backwards compatibility
00199  data.l[1]= timestamp
00200 */
00201 
00202 
00203 //****************************************
00204 // Workspace
00205 //****************************************
00206 
00207 
00216 void Workspace::setActiveClient( Client* c, allowed_t )
00217     {
00218     if ( active_client == c )
00219         return;
00220     if( active_popup && active_popup_client != c && set_active_client_recursion == 0 ) 
00221         closeActivePopup();
00222     StackingUpdatesBlocker blocker( this );
00223     ++set_active_client_recursion;
00224     if( active_client != NULL )
00225         { // note that this may call setActiveClient( NULL ), therefore the recursion counter
00226         active_client->setActive( false, !c || !c->isModal() || c != active_client->transientFor() );
00227         }
00228     active_client = c;
00229     Q_ASSERT( c == NULL || c->isActive());
00230     if( active_client != NULL )
00231         last_active_client = active_client;
00232     if ( active_client ) 
00233         {
00234         updateFocusChains( active_client, FocusChainMakeFirst );
00235         active_client->demandAttention( false );
00236         }
00237     pending_take_activity = NULL;
00238 
00239     updateCurrentTopMenu();
00240     updateToolWindows( false );
00241     if( c )
00242         disableGlobalShortcutsForClient( c->rules()->checkDisableGlobalShortcuts( false ));
00243     else
00244         disableGlobalShortcutsForClient( false );
00245 
00246     updateStackingOrder(); // e.g. fullscreens have different layer when active/not-active
00247 
00248     rootInfo->setActiveWindow( active_client? active_client->window() : 0 );
00249     updateColormap();
00250     --set_active_client_recursion;
00251     }
00252 
00264 void Workspace::activateClient( Client* c, bool force )
00265     {
00266     if( c == NULL )
00267         {
00268         focusToNull();
00269         setActiveClient( NULL, Allowed );
00270         return;
00271         }
00272     raiseClient( c );
00273     if (!c->isOnDesktop(currentDesktop()) )
00274         {
00275         ++block_focus;
00276         setCurrentDesktop( c->desktop() );
00277         --block_focus;
00278         }
00279     if( c->isMinimized())
00280         c->unminimize();
00281 
00282 // TODO force should perhaps allow this only if the window already contains the mouse
00283     if( options->focusPolicyIsReasonable() || force )
00284         requestFocus( c, force );
00285 
00286     // Don't update user time for clients that have focus stealing workaround.
00287     // As they usually belong to the current active window but fail to provide
00288     // this information, updating their user time would make the user time
00289     // of the currently active window old, and reject further activation for it.
00290     // E.g. typing URL in minicli which will show kio_uiserver dialog (with workaround),
00291     // and then kdesktop shows dialog about SSL certificate.
00292     // This needs also avoiding user creation time in Client::readUserTimeMapTimestamp().
00293     if( !c->ignoreFocusStealing())
00294         c->updateUserTime();
00295     }
00296 
00304 void Workspace::requestFocus( Client* c, bool force )
00305     {
00306     takeActivity( c, ActivityFocus | ( force ? ActivityFocusForce : 0 ), false);
00307     }
00308     
00309 void Workspace::takeActivity( Client* c, int flags, bool handled )
00310     {
00311      // the 'if( c == active_client ) return;' optimization mustn't be done here
00312     if (!focusChangeEnabled() && ( c != active_client) )
00313         flags &= ~ActivityFocus;
00314 
00315     if ( !c ) 
00316         {
00317         focusToNull();
00318         return;
00319         }
00320 
00321     if( flags & ActivityFocus )
00322         {
00323         Client* modal = c->findModal();
00324         if( modal != NULL && modal != c )   
00325             { 
00326             if( !modal->isOnDesktop( c->desktop()))
00327                 {
00328                 modal->setDesktop( c->desktop());
00329                 if( modal->desktop() != c->desktop()) // forced desktop
00330                     activateClient( modal );
00331                 }
00332             // if the click was inside the window (i.e. handled is set),
00333             // but it has a modal, there's no need to use handled mode, because
00334             // the modal doesn't get the click anyway
00335             // raising of the original window needs to be still done
00336             if( flags & ActivityRaise )
00337                 raiseClient( c );
00338             c = modal;
00339             handled = false;
00340             }
00341         cancelDelayFocus();
00342         }
00343     if ( !( flags & ActivityFocusForce ) && ( c->isTopMenu() || c->isDock() || c->isSplash()) )
00344         flags &= ~ActivityFocus; // toplevel menus and dock windows don't take focus if not forced
00345     if( c->isShade())
00346         {
00347         if( c->wantsInput() && ( flags & ActivityFocus ))
00348             {
00349         // client cannot accept focus, but at least the window should be active (window menu, et. al. )
00350             c->setActive( true );
00351             focusToNull();
00352             }
00353         flags &= ~ActivityFocus;
00354         handled = false; // no point, can't get clicks
00355         }
00356     if( !c->isShown( true )) // shouldn't happen, call activateClient() if needed
00357         {
00358         kdWarning( 1212 ) << "takeActivity: not shown" << endl;
00359         return;
00360         }
00361     c->takeActivity( flags, handled, Allowed );
00362     }
00363 
00364 void Workspace::handleTakeActivity( Client* c, Time /*timestamp*/, int flags )
00365     {
00366     if( pending_take_activity != c ) // pending_take_activity is reset when doing restack or activation
00367         return;
00368     if(( flags & ActivityRaise ) != 0 )
00369         raiseClient( c );
00370     if(( flags & ActivityFocus ) != 0 && c->isShown( false ))
00371         c->takeFocus( Allowed );
00372     pending_take_activity = NULL;
00373     }
00374 
00382 void Workspace::clientHidden( Client* c )
00383     {
00384     assert( !c->isShown( true ) || !c->isOnCurrentDesktop());
00385     activateNextClient( c );
00386     }
00387 
00388 // deactivates 'c' and activates next client
00389 bool Workspace::activateNextClient( Client* c )
00390     {
00391     // if 'c' is not the active or the to-become active one, do nothing
00392     if( !( c == active_client
00393             || ( should_get_focus.count() > 0 && c == should_get_focus.last())))
00394         return false;
00395     closeActivePopup();
00396     if( c != NULL )
00397         {
00398         if( c == active_client )
00399             setActiveClient( NULL, Allowed );
00400         should_get_focus.remove( c );
00401         }
00402     if( focusChangeEnabled())
00403         {
00404         if ( options->focusPolicyIsReasonable())
00405             { // search the focus_chain for a client to transfer focus to
00406               // if 'c' is transient, transfer focus to the first suitable mainwindow
00407             Client* get_focus = NULL;
00408             const ClientList mainwindows = ( c != NULL ? c->mainClients() : ClientList());
00409             for( ClientList::ConstIterator it = focus_chain[currentDesktop()].fromLast();
00410                  it != focus_chain[currentDesktop()].end();
00411                  --it )
00412                 {
00413                 if( !(*it)->isShown( false ) || !(*it)->isOnCurrentDesktop())
00414                     continue;
00415                 if( mainwindows.contains( *it ))
00416                     {
00417                     get_focus = *it;
00418                     break;
00419                     }
00420                 if( get_focus == NULL )
00421                     get_focus = *it;
00422                 }
00423             if( get_focus == NULL )
00424                 get_focus = findDesktop( true, currentDesktop());
00425             if( get_focus != NULL )
00426                 requestFocus( get_focus );
00427             else
00428                 focusToNull();
00429             }
00430             else
00431                 return false;
00432         }
00433     else
00434         // if blocking focus, move focus to the desktop later if needed
00435         // in order to avoid flickering
00436         focusToNull();
00437     return true;
00438     }
00439 
00440 
00441 void Workspace::gotFocusIn( const Client* c )
00442     {
00443     if( should_get_focus.contains( const_cast< Client* >( c )))
00444         { // remove also all sooner elements that should have got FocusIn,
00445       // but didn't for some reason (and also won't anymore, because they were sooner)
00446         while( should_get_focus.first() != c )
00447             should_get_focus.pop_front();
00448         should_get_focus.pop_front(); // remove 'c'
00449         }
00450     }
00451 
00452 void Workspace::setShouldGetFocus( Client* c )
00453     {
00454     should_get_focus.append( c );
00455     updateStackingOrder(); // e.g. fullscreens have different layer when active/not-active
00456     }
00457 
00458 // focus_in -> the window got FocusIn event
00459 // session_active -> the window was active when saving session
00460 bool Workspace::allowClientActivation( const Client* c, Time time, bool focus_in )
00461     {
00462     // options->focusStealingPreventionLevel :
00463     // 0 - none    - old KWin behaviour, new windows always get focus
00464     // 1 - low     - focus stealing prevention is applied normally, when unsure, activation is allowed
00465     // 2 - normal  - focus stealing prevention is applied normally, when unsure, activation is not allowed,
00466     //              this is the default
00467     // 3 - high    - new window gets focus only if it belongs to the active application,
00468     //              or when no window is currently active
00469     // 4 - extreme - no window gets focus without user intervention
00470     if( time == -1U )
00471         time = c->userTime();
00472     int level = c->rules()->checkFSP( options->focusStealingPreventionLevel );
00473     if( session_saving && level <= 2 ) // <= normal
00474         {
00475         return true;
00476         }
00477     Client* ac = mostRecentlyActivatedClient();
00478     if( focus_in )
00479         {
00480         if( should_get_focus.contains( const_cast< Client* >( c )))
00481             return true; // FocusIn was result of KWin's action
00482         // Before getting FocusIn, the active Client already
00483         // got FocusOut, and therefore got deactivated.
00484         ac = last_active_client;
00485         }
00486     if( time == 0 ) // explicitly asked not to get focus
00487         return false;
00488     if( level == 0 ) // none
00489         return true;
00490     if( level == 4 ) // extreme
00491         return false;
00492     if( !c->isOnCurrentDesktop())
00493         return false; // allow only with level == 0
00494     if( c->ignoreFocusStealing())
00495         return true;
00496     if( ac == NULL || ac->isDesktop())
00497         {
00498 //        kdDebug( 1212 ) << "Activation: No client active, allowing" << endl;
00499         return true; // no active client -> always allow
00500         }
00501     // TODO window urgency  -> return true?
00502     if( Client::belongToSameApplication( c, ac, true ))
00503         {
00504 //        kdDebug( 1212 ) << "Activation: Belongs to active application" << endl;
00505         return true;
00506         }
00507     if( level == 3 ) // high
00508         return false;
00509     if( time == -1U )  // no time known
00510         {
00511 //        kdDebug( 1212 ) << "Activation: No timestamp at all" << endl;
00512         if( level == 1 ) // low
00513             return true;
00514         // no timestamp at all, don't activate - because there's also creation timestamp
00515         // done on CreateNotify, this case should happen only in case application
00516         // maps again already used window, i.e. this won't happen after app startup
00517         return false; 
00518         }
00519     // level == 2 // normal
00520     Time user_time = ac->userTime();
00521 //    kdDebug( 1212 ) << "Activation, compared:" << c << ":" << time << ":" << user_time
00522 //        << ":" << ( timestampCompare( time, user_time ) >= 0 ) << endl;
00523     return timestampCompare( time, user_time ) >= 0; // time >= user_time
00524     }
00525 
00526 // basically the same like allowClientActivation(), this time allowing
00527 // a window to be fully raised upon its own request (XRaiseWindow),
00528 // if refused, it will be raised only on top of windows belonging
00529 // to the same application
00530 bool Workspace::allowFullClientRaising( const Client* c, Time time )
00531     {
00532     int level = c->rules()->checkFSP( options->focusStealingPreventionLevel );
00533     if( session_saving && level <= 2 ) // <= normal
00534         {
00535         return true;
00536         }
00537     Client* ac = mostRecentlyActivatedClient();
00538     if( level == 0 ) // none
00539         return true;
00540     if( level == 4 ) // extreme
00541         return false;
00542     if( ac == NULL || ac->isDesktop())
00543         {
00544 //        kdDebug( 1212 ) << "Raising: No client active, allowing" << endl;
00545         return true; // no active client -> always allow
00546         }
00547     if( c->ignoreFocusStealing())
00548         return true;
00549     // TODO window urgency  -> return true?
00550     if( Client::belongToSameApplication( c, ac, true ))
00551         {
00552 //        kdDebug( 1212 ) << "Raising: Belongs to active application" << endl;
00553         return true;
00554         }
00555     if( level == 3 ) // high
00556         return false;
00557     Time user_time = ac->userTime();
00558 //    kdDebug( 1212 ) << "Raising, compared:" << time << ":" << user_time
00559 //        << ":" << ( timestampCompare( time, user_time ) >= 0 ) << endl;
00560     return timestampCompare( time, user_time ) >= 0; // time >= user_time
00561     }
00562 
00563 // called from Client after FocusIn that wasn't initiated by KWin and the client
00564 // wasn't allowed to activate
00565 void Workspace::restoreFocus()
00566     {
00567     // this updateXTime() is necessary - as FocusIn events don't have
00568     // a timestamp *sigh*, kwin's timestamp would be older than the timestamp
00569     // that was used by whoever caused the focus change, and therefore
00570     // the attempt to restore the focus would fail due to old timestamp
00571     updateXTime();
00572     if( should_get_focus.count() > 0 )
00573         requestFocus( should_get_focus.last());
00574     else if( last_active_client )
00575         requestFocus( last_active_client );
00576     }
00577 
00578 void Workspace::clientAttentionChanged( Client* c, bool set )
00579     {
00580     if( set )
00581         {
00582         attention_chain.remove( c );
00583         attention_chain.prepend( c );
00584         }
00585     else
00586         attention_chain.remove( c );
00587     }
00588 
00589 // This is used when a client should be shown active immediately after requestFocus(),
00590 // without waiting for the matching FocusIn that will really make the window the active one.
00591 // Used only in special cases, e.g. for MouseActivateRaiseandMove with transparent windows,
00592 bool Workspace::fakeRequestedActivity( Client* c )
00593     {
00594     if( should_get_focus.count() > 0 && should_get_focus.last() == c )
00595         {
00596         if( c->isActive())
00597             return false;
00598         c->setActive( true );
00599         return true;
00600         }
00601     return false;
00602     }
00603 
00604 void Workspace::unfakeActivity( Client* c )
00605     {
00606     if( should_get_focus.count() > 0 && should_get_focus.last() == c )
00607         { // TODO this will cause flicker, and probably is not needed
00608         if( last_active_client != NULL )
00609             last_active_client->setActive( true );
00610         else
00611             c->setActive( false );
00612         }
00613     }
00614 
00615 
00616 //********************************************
00617 // Client
00618 //********************************************
00619 
00626 void Client::updateUserTime( Time time )
00627     { // copied in Group::updateUserTime
00628     if( time == CurrentTime )
00629         time = qt_x_time;
00630     if( time != -1U
00631         && ( user_time == CurrentTime
00632             || timestampCompare( time, user_time ) > 0 )) // time > user_time
00633         user_time = time;
00634     group()->updateUserTime( user_time );
00635     }
00636 
00637 Time Client::readUserCreationTime() const
00638     {
00639     long result = -1; // Time == -1 means none
00640     Atom type;
00641     int format, status;
00642     unsigned long nitems = 0;
00643     unsigned long extra = 0;
00644     unsigned char *data = 0;
00645     KXErrorHandler handler; // ignore errors?
00646     status = XGetWindowProperty( qt_xdisplay(), window(),
00647         atoms->kde_net_wm_user_creation_time, 0, 10000, FALSE, XA_CARDINAL,
00648         &type, &format, &nitems, &extra, &data );
00649     if (status  == Success )
00650         {
00651         if (data && nitems > 0)
00652             result = *((long*) data);
00653         XFree(data);
00654         }
00655     return result;       
00656     }
00657 
00658 void Client::demandAttention( bool set )
00659     {
00660     if( isActive())
00661         set = false;
00662     if( demands_attention == set )
00663         return;
00664     demands_attention = set;
00665     if( demands_attention )
00666         {
00667         // Demand attention flag is often set right from manage(), when focus stealing prevention
00668         // steps in. At that time the window has no taskbar entry yet, so KNotify cannot place
00669         // e.g. the passive popup next to it. So wait up to 1 second for the icon geometry
00670         // to be set.
00671         // Delayed call to KNotify also solves the problem of having X server grab in manage(),
00672         // which may deadlock when KNotify (or KLauncher when launching KNotify) need to access X.
00673         Notify::Event e = isOnCurrentDesktop() ? Notify::DemandAttentionCurrent : Notify::DemandAttentionOther;
00674         // Setting the demands attention state needs to be done directly in KWin, because
00675         // KNotify would try to set it, resulting in a call to KNotify again, etc.
00676         if( Notify::makeDemandAttention( e ))
00677             info->setState( set ? NET::DemandsAttention : 0, NET::DemandsAttention );
00678 
00679         if( demandAttentionKNotifyTimer == NULL )
00680             {
00681             demandAttentionKNotifyTimer = new QTimer( this );
00682             connect( demandAttentionKNotifyTimer, SIGNAL( timeout()), SLOT( demandAttentionKNotify()));
00683             }
00684         demandAttentionKNotifyTimer->start( 1000, true );
00685         }
00686     else
00687         info->setState( set ? NET::DemandsAttention : 0, NET::DemandsAttention );
00688     workspace()->clientAttentionChanged( this, set );
00689     }
00690 
00691 void Client::demandAttentionKNotify()
00692     {
00693     Notify::Event e = isOnCurrentDesktop() ? Notify::DemandAttentionCurrent : Notify::DemandAttentionOther;
00694     Notify::raise( e, i18n( "Window '%1' demands attention." ).arg( KStringHandler::csqueeze(caption())), this );
00695     demandAttentionKNotifyTimer->stop();
00696     demandAttentionKNotifyTimer->deleteLater();
00697     demandAttentionKNotifyTimer = NULL;
00698     }
00699 
00700 // TODO I probably shouldn't be lazy here and do it without the macro, so that people can read it
00701 KWIN_COMPARE_PREDICATE( SameApplicationActiveHackPredicate, const Client*,
00702     // ignore already existing splashes, toolbars, utilities, menus and topmenus,
00703     // as the app may show those before the main window
00704     !cl->isSplash() && !cl->isToolbar() && !cl->isTopMenu() && !cl->isUtility() && !cl->isMenu()
00705     && Client::belongToSameApplication( cl, value, true ) && cl != value);
00706 
00707 Time Client::readUserTimeMapTimestamp( const KStartupInfoId* asn_id, const KStartupInfoData* asn_data,
00708     bool session ) const
00709     {
00710     Time time = info->userTime();
00711 //    kdDebug( 1212 ) << "User timestamp, initial:" << time << endl;
00712     // newer ASN timestamp always replaces user timestamp, unless user timestamp is 0
00713     // helps e.g. with konqy reusing
00714     if( asn_data != NULL && time != 0 )
00715         {
00716         // prefer timestamp from ASN id (timestamp from data is obsolete way)
00717         if( asn_id->timestamp() != 0
00718             && ( time == -1U || timestampCompare( asn_id->timestamp(), time ) > 0 ))
00719             {
00720             time = asn_id->timestamp();
00721             }
00722         else if( asn_data->timestamp() != -1U
00723             && ( time == -1U || timestampCompare( asn_data->timestamp(), time ) > 0 ))
00724             {
00725             time = asn_data->timestamp();
00726             }
00727         }
00728 //    kdDebug( 1212 ) << "User timestamp, ASN:" << time << endl;
00729     if( time == -1U )
00730         { // The window doesn't have any timestamp.
00731       // If it's the first window for its application
00732       // (i.e. there's no other window from the same app),
00733       // use the _KDE_NET_WM_USER_CREATION_TIME trick.
00734       // Otherwise, refuse activation of a window
00735       // from already running application if this application
00736       // is not the active one (unless focus stealing prevention is turned off).
00737         Client* act = workspace()->mostRecentlyActivatedClient();
00738         if( act != NULL && !belongToSameApplication( act, this, true ))
00739             {
00740             bool first_window = true;
00741             if( isTransient())
00742                 {
00743                 if( act->hasTransient( this, true ))
00744                     ; // is transient for currently active window, even though it's not
00745                       // the same app (e.g. kcookiejar dialog) -> allow activation
00746                 else if( groupTransient() &&
00747                     findClientInList( mainClients(), SameApplicationActiveHackPredicate( this )) == NULL )
00748                     ; // standalone transient
00749                 else
00750                     first_window = false;
00751                 }
00752             else
00753                 {
00754                 if( workspace()->findClient( SameApplicationActiveHackPredicate( this )))
00755                     first_window = false;
00756                 }
00757             // don't refuse if focus stealing prevention is turned off
00758             if( !first_window && rules()->checkFSP( options->focusStealingPreventionLevel ) > 0 )
00759                 {
00760 //                kdDebug( 1212 ) << "User timestamp, already exists:" << 0 << endl;
00761                 return 0; // refuse activation
00762                 }
00763             }
00764         // Creation time would just mess things up during session startup,
00765         // as possibly many apps are started up at the same time.
00766         // If there's no active window yet, no timestamp will be needed,
00767         // as plain Workspace::allowClientActivation() will return true
00768         // in such case. And if there's already active window,
00769         // it's better not to activate the new one.
00770         // Unless it was the active window at the time
00771         // of session saving and there was no user interaction yet,
00772         // this check will be done in manage().
00773         if( session )
00774             return -1U;
00775         if( ignoreFocusStealing() && act != NULL )
00776             time = act->userTime();
00777         else
00778             time = readUserCreationTime();
00779         }
00780 //    kdDebug( 1212 ) << "User timestamp, final:" << this << ":" << time << endl;
00781     return time;
00782     }
00783 
00784 Time Client::userTime() const
00785     {
00786     Time time = user_time;
00787     if( time == 0 ) // doesn't want focus after showing
00788         return 0;
00789     assert( group() != NULL );
00790     if( time == -1U
00791          || ( group()->userTime() != -1U
00792                  && timestampCompare( group()->userTime(), time ) > 0 ))
00793         time = group()->userTime();
00794     return time;
00795     }
00796 
00808 void Client::setActive( bool act, bool updateOpacity_)
00809     {
00810     if ( active == act )
00811         return;
00812     active = act;
00813     workspace()->setActiveClient( act ? this : NULL, Allowed );
00814     
00815     if (updateOpacity_) updateOpacity();
00816     if (isModal() && transientFor())
00817     {
00818         if (!act) transientFor()->updateOpacity();
00819         else if (!transientFor()->custom_opacity) transientFor()->setOpacity(options->translucentActiveWindows, options->activeWindowOpacity);
00820     }
00821     updateShadowSize();
00822     
00823     if ( active )
00824         Notify::raise( Notify::Activate );
00825 
00826     if( !active )
00827         cancelAutoRaise();
00828 
00829     if( !active && shade_mode == ShadeActivated )
00830         setShade( ShadeNormal );
00831         
00832     StackingUpdatesBlocker blocker( workspace());
00833     workspace()->updateClientLayer( this ); // active windows may get different layer
00834     // TODO optimize? mainClients() may be a bit expensive
00835     ClientList mainclients = mainClients();
00836     for( ClientList::ConstIterator it = mainclients.begin();
00837          it != mainclients.end();
00838          ++it )
00839         if( (*it)->isFullScreen()) // fullscreens go high even if their transient is active
00840             workspace()->updateClientLayer( *it );
00841     if( decoration != NULL )
00842         decoration->activeChange();
00843     updateMouseGrab();
00844     updateUrgency(); // demand attention again if it's still urgent
00845     }
00846 
00847 void Client::startupIdChanged()
00848     {
00849     KStartupInfoId asn_id;
00850     KStartupInfoData asn_data;
00851     bool asn_valid = workspace()->checkStartupNotification( window(), asn_id, asn_data );
00852     if( !asn_valid )
00853         return;
00854     // If the ASN contains desktop, move it to the desktop, otherwise move it to the current
00855     // desktop (since the new ASN should make the window act like if it's a new application
00856     // launched). However don't affect the window's desktop if it's set to be on all desktops.
00857     int desktop = workspace()->currentDesktop();
00858     if( asn_data.desktop() != 0 )
00859         desktop = asn_data.desktop();
00860     if( !isOnAllDesktops())
00861         workspace()->sendClientToDesktop( this, desktop, true );
00862     Time timestamp = asn_id.timestamp();
00863     if( timestamp == 0 && asn_data.timestamp() != -1U )
00864         timestamp = asn_data.timestamp();
00865     if( timestamp != 0 )
00866         {
00867         bool activate = workspace()->allowClientActivation( this, timestamp );
00868         if( asn_data.desktop() != 0 && !isOnCurrentDesktop())
00869             activate = false; // it was started on different desktop than current one
00870         if( activate )
00871             workspace()->activateClient( this );
00872         else
00873             demandAttention();
00874         }
00875     }
00876 
00877 void Client::updateUrgency()
00878     {
00879     if( urgency )
00880         demandAttention();
00881     }
00882 
00883 void Client::shortcutActivated()
00884     {
00885     workspace()->activateClient( this, true ); // force
00886     }
00887 
00888 //****************************************
00889 // Group
00890 //****************************************
00891     
00892 void Group::startupIdChanged()
00893     {
00894     KStartupInfoId asn_id;
00895     KStartupInfoData asn_data;
00896     bool asn_valid = workspace()->checkStartupNotification( leader_wid, asn_id, asn_data );
00897     if( !asn_valid )
00898         return;
00899     if( asn_id.timestamp() != 0 && user_time != -1U
00900         && timestampCompare( asn_id.timestamp(), user_time ) > 0 )
00901         {
00902         user_time = asn_id.timestamp();
00903         }
00904     else if( asn_data.timestamp() != -1U && user_time != -1U
00905         && timestampCompare( asn_data.timestamp(), user_time ) > 0 )
00906         {
00907         user_time = asn_data.timestamp();
00908         }
00909     }
00910 
00911 void Group::updateUserTime( Time time )
00912     { // copy of Client::updateUserTime
00913     if( time == CurrentTime )
00914         time = qt_x_time;
00915     if( time != -1U
00916         && ( user_time == CurrentTime
00917             || timestampCompare( time, user_time ) > 0 )) // time > user_time
00918         user_time = time;
00919     }
00920 
00921 } // namespace
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