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         setActiveClient( NULL, Allowed );
00269         return;
00270         }
00271     raiseClient( c );
00272     if (!c->isOnDesktop(currentDesktop()) )
00273         {
00274         ++block_focus;
00275         setCurrentDesktop( c->desktop() );
00276         --block_focus;
00277         }
00278     if( c->isMinimized())
00279         c->unminimize();
00280 
00281 // TODO force should perhaps allow this only if the window already contains the mouse
00282     if( options->focusPolicyIsReasonable() || force )
00283         requestFocus( c, force );
00284 
00285     // Don't update user time for clients that have focus stealing workaround.
00286     // As they usually belong to the current active window but fail to provide
00287     // this information, updating their user time would make the user time
00288     // of the currently active window old, and reject further activation for it.
00289     // E.g. typing URL in minicli which will show kio_uiserver dialog (with workaround),
00290     // and then kdesktop shows dialog about SSL certificate.
00291     // This needs also avoiding user creation time in Client::readUserTimeMapTimestamp().
00292     if( !c->ignoreFocusStealing())
00293         c->updateUserTime();
00294     }
00295 
00303 void Workspace::requestFocus( Client* c, bool force )
00304     {
00305     takeActivity( c, ActivityFocus | ( force ? ActivityFocusForce : 0 ), false);
00306     }
00307     
00308 void Workspace::takeActivity( Client* c, int flags, bool handled )
00309     {
00310      // the 'if( c == active_client ) return;' optimization mustn't be done here
00311     if (!focusChangeEnabled() && ( c != active_client) )
00312         flags &= ~ActivityFocus;
00313 
00314     if ( !c ) 
00315         {
00316         focusToNull();
00317         return;
00318         }
00319 
00320     if( flags & ActivityFocus )
00321         {
00322         Client* modal = c->findModal();
00323         if( modal != NULL && modal != c )   
00324             { 
00325             if( !modal->isOnDesktop( c->desktop()))
00326                 {
00327                 modal->setDesktop( c->desktop());
00328                 if( modal->desktop() != c->desktop()) // forced desktop
00329                     activateClient( modal );
00330                 }
00331             // if the click was inside the window (i.e. handled is set),
00332             // but it has a modal, there's no need to use handled mode, because
00333             // the modal doesn't get the click anyway
00334             // raising of the original window needs to be still done
00335             if( flags & ActivityRaise )
00336                 raiseClient( c );
00337             c = modal;
00338             handled = false;
00339             }
00340         cancelDelayFocus();
00341         }
00342     if ( !( flags & ActivityFocusForce ) && ( c->isTopMenu() || c->isDock() || c->isSplash()) )
00343         flags &= ~ActivityFocus; // toplevel menus and dock windows don't take focus if not forced
00344     if( c->isShade())
00345         {
00346         if( c->wantsInput() && ( flags & ActivityFocus ))
00347             {
00348         // client cannot accept focus, but at least the window should be active (window menu, et. al. )
00349             c->setActive( true );
00350             focusToNull();
00351             }
00352         flags &= ~ActivityFocus;
00353         handled = false; // no point, can't get clicks
00354         }
00355     if( !c->isShown( true )) // shouldn't happen, call activateClient() if needed
00356         {
00357         kdWarning( 1212 ) << "takeActivity: not shown" << endl;
00358         return;
00359         }
00360     c->takeActivity( flags, handled, Allowed );
00361     }
00362 
00363 void Workspace::handleTakeActivity( Client* c, Time /*timestamp*/, int flags )
00364     {
00365     if( pending_take_activity != c ) // pending_take_activity is reset when doing restack or activation
00366         return;
00367     if(( flags & ActivityRaise ) != 0 )
00368         raiseClient( c );
00369     if(( flags & ActivityFocus ) != 0 && c->isShown( false ))
00370         c->takeFocus( Allowed );
00371     pending_take_activity = NULL;
00372     }
00373 
00381 void Workspace::clientHidden( Client* c )
00382     {
00383     assert( !c->isShown( true ) || !c->isOnCurrentDesktop());
00384     activateNextClient( c );
00385     }
00386 
00387 // deactivates 'c' and activates next client
00388 bool Workspace::activateNextClient( Client* c )
00389     {
00390     // if 'c' is not the active or the to-become active one, do nothing
00391     if( !( c == active_client
00392             || ( should_get_focus.count() > 0 && c == should_get_focus.last())))
00393         return false;
00394     closeActivePopup();
00395     if( c != NULL )
00396         {
00397         if( c == active_client )
00398             setActiveClient( NULL, Allowed );
00399         should_get_focus.remove( c );
00400         }
00401     if( focusChangeEnabled())
00402         {
00403         if ( options->focusPolicyIsReasonable())
00404             { // search the focus_chain for a client to transfer focus to
00405               // if 'c' is transient, transfer focus to the first suitable mainwindow
00406             Client* get_focus = NULL;
00407             const ClientList mainwindows = ( c != NULL ? c->mainClients() : ClientList());
00408             for( ClientList::ConstIterator it = focus_chain[currentDesktop()].fromLast();
00409                  it != focus_chain[currentDesktop()].end();
00410                  --it )
00411                 {
00412                 if( !(*it)->isShown( false ) || !(*it)->isOnCurrentDesktop())
00413                     continue;
00414                 if( mainwindows.contains( *it ))
00415                     {
00416                     get_focus = *it;
00417                     break;
00418                     }
00419                 if( get_focus == NULL )
00420                     get_focus = *it;
00421                 }
00422             if( get_focus == NULL )
00423                 get_focus = findDesktop( true, currentDesktop());
00424             if( get_focus != NULL )
00425                 requestFocus( get_focus );
00426             else
00427                 focusToNull();
00428             }
00429             else
00430                 return false;
00431         }
00432     else
00433         // if blocking focus, move focus to the desktop later if needed
00434         // in order to avoid flickering
00435         focusToNull();
00436     return true;
00437     }
00438 
00439 
00440 void Workspace::gotFocusIn( const Client* c )
00441     {
00442     if( should_get_focus.contains( const_cast< Client* >( c )))
00443         { // remove also all sooner elements that should have got FocusIn,
00444       // but didn't for some reason (and also won't anymore, because they were sooner)
00445         while( should_get_focus.first() != c )
00446             should_get_focus.pop_front();
00447         should_get_focus.pop_front(); // remove 'c'
00448         }
00449     }
00450 
00451 void Workspace::setShouldGetFocus( Client* c )
00452     {
00453     should_get_focus.append( c );
00454     updateStackingOrder(); // e.g. fullscreens have different layer when active/not-active
00455     }
00456 
00457 // focus_in -> the window got FocusIn event
00458 // session_active -> the window was active when saving session
00459 bool Workspace::allowClientActivation( const Client* c, Time time, bool focus_in )
00460     {
00461     // options->focusStealingPreventionLevel :
00462     // 0 - none    - old KWin behaviour, new windows always get focus
00463     // 1 - low     - focus stealing prevention is applied normally, when unsure, activation is allowed
00464     // 2 - normal  - focus stealing prevention is applied normally, when unsure, activation is not allowed,
00465     //              this is the default
00466     // 3 - high    - new window gets focus only if it belongs to the active application,
00467     //              or when no window is currently active
00468     // 4 - extreme - no window gets focus without user intervention
00469     if( time == -1U )
00470         time = c->userTime();
00471     int level = c->rules()->checkFSP( options->focusStealingPreventionLevel );
00472     if( session_saving && level <= 2 ) // <= normal
00473         {
00474         return true;
00475         }
00476     Client* ac = mostRecentlyActivatedClient();
00477     if( focus_in )
00478         {
00479         if( should_get_focus.contains( const_cast< Client* >( c )))
00480             return true; // FocusIn was result of KWin's action
00481         // Before getting FocusIn, the active Client already
00482         // got FocusOut, and therefore got deactivated.
00483         ac = last_active_client;
00484         }
00485     if( time == 0 ) // explicitly asked not to get focus
00486         return false;
00487     if( level == 0 ) // none
00488         return true;
00489     if( level == 4 ) // extreme
00490         return false;
00491     if( !c->isOnCurrentDesktop())
00492         return false; // allow only with level == 0
00493     if( c->ignoreFocusStealing())
00494         return true;
00495     if( ac == NULL || ac->isDesktop())
00496         {
00497 //        kdDebug( 1212 ) << "Activation: No client active, allowing" << endl;
00498         return true; // no active client -> always allow
00499         }
00500     // TODO window urgency  -> return true?
00501     if( Client::belongToSameApplication( c, ac, true ))
00502         {
00503 //        kdDebug( 1212 ) << "Activation: Belongs to active application" << endl;
00504         return true;
00505         }
00506     if( level == 3 ) // high
00507         return false;
00508     if( time == -1U )  // no time known
00509         {
00510 //        kdDebug( 1212 ) << "Activation: No timestamp at all" << endl;
00511         if( level == 1 ) // low
00512             return true;
00513         // no timestamp at all, don't activate - because there's also creation timestamp
00514         // done on CreateNotify, this case should happen only in case application
00515         // maps again already used window, i.e. this won't happen after app startup
00516         return false; 
00517         }
00518     // level == 2 // normal
00519     Time user_time = ac->userTime();
00520 //    kdDebug( 1212 ) << "Activation, compared:" << c << ":" << time << ":" << user_time
00521 //        << ":" << ( timestampCompare( time, user_time ) >= 0 ) << endl;
00522     return timestampCompare( time, user_time ) >= 0; // time >= user_time
00523     }
00524 
00525 // basically the same like allowClientActivation(), this time allowing
00526 // a window to be fully raised upon its own request (XRaiseWindow),
00527 // if refused, it will be raised only on top of windows belonging
00528 // to the same application
00529 bool Workspace::allowFullClientRaising( const Client* c, Time time )
00530     {
00531     int level = c->rules()->checkFSP( options->focusStealingPreventionLevel );
00532     if( session_saving && level <= 2 ) // <= normal
00533         {
00534         return true;
00535         }
00536     Client* ac = mostRecentlyActivatedClient();
00537     if( level == 0 ) // none
00538         return true;
00539     if( level == 4 ) // extreme
00540         return false;
00541     if( ac == NULL || ac->isDesktop())
00542         {
00543 //        kdDebug( 1212 ) << "Raising: No client active, allowing" << endl;
00544         return true; // no active client -> always allow
00545         }
00546     if( c->ignoreFocusStealing())
00547         return true;
00548     // TODO window urgency  -> return true?
00549     if( Client::belongToSameApplication( c, ac, true ))
00550         {
00551 //        kdDebug( 1212 ) << "Raising: Belongs to active application" << endl;
00552         return true;
00553         }
00554     if( level == 3 ) // high
00555         return false;
00556     Time user_time = ac->userTime();
00557 //    kdDebug( 1212 ) << "Raising, compared:" << time << ":" << user_time
00558 //        << ":" << ( timestampCompare( time, user_time ) >= 0 ) << endl;
00559     return timestampCompare( time, user_time ) >= 0; // time >= user_time
00560     }
00561 
00562 // called from Client after FocusIn that wasn't initiated by KWin and the client
00563 // wasn't allowed to activate
00564 void Workspace::restoreFocus()
00565     {
00566     // this updateXTime() is necessary - as FocusIn events don't have
00567     // a timestamp *sigh*, kwin's timestamp would be older than the timestamp
00568     // that was used by whoever caused the focus change, and therefore
00569     // the attempt to restore the focus would fail due to old timestamp
00570     updateXTime();
00571     if( should_get_focus.count() > 0 )
00572         requestFocus( should_get_focus.last());
00573     else if( last_active_client )
00574         requestFocus( last_active_client );
00575     }
00576 
00577 void Workspace::clientAttentionChanged( Client* c, bool set )
00578     {
00579     if( set )
00580         {
00581         attention_chain.remove( c );
00582         attention_chain.prepend( c );
00583         }
00584     else
00585         attention_chain.remove( c );
00586     }
00587 
00588 // This is used when a client should be shown active immediately after requestFocus(),
00589 // without waiting for the matching FocusIn that will really make the window the active one.
00590 // Used only in special cases, e.g. for MouseActivateRaiseandMove with transparent windows,
00591 bool Workspace::fakeRequestedActivity( Client* c )
00592     {
00593     if( should_get_focus.count() > 0 && should_get_focus.last() == c )
00594         {
00595         if( c->isActive())
00596             return false;
00597         c->setActive( true );
00598         return true;
00599         }
00600     return false;
00601     }
00602 
00603 void Workspace::unfakeActivity( Client* c )
00604     {
00605     if( should_get_focus.count() > 0 && should_get_focus.last() == c )
00606         { // TODO this will cause flicker, and probably is not needed
00607         if( last_active_client != NULL )
00608             last_active_client->setActive( true );
00609         else
00610             c->setActive( false );
00611         }
00612     }
00613 
00614 
00615 //********************************************
00616 // Client
00617 //********************************************
00618 
00625 void Client::updateUserTime( Time time )
00626     { // copied in Group::updateUserTime
00627     if( time == CurrentTime )
00628         time = qt_x_time;
00629     if( time != -1U
00630         && ( user_time == CurrentTime
00631             || timestampCompare( time, user_time ) > 0 )) // time > user_time
00632         user_time = time;
00633     group()->updateUserTime( user_time );
00634     }
00635 
00636 Time Client::readUserCreationTime() const
00637     {
00638     long result = -1; // Time == -1 means none
00639     Atom type;
00640     int format, status;
00641     unsigned long nitems = 0;
00642     unsigned long extra = 0;
00643     unsigned char *data = 0;
00644     KXErrorHandler handler; // ignore errors?
00645     status = XGetWindowProperty( qt_xdisplay(), window(),
00646         atoms->kde_net_wm_user_creation_time, 0, 10000, FALSE, XA_CARDINAL,
00647         &type, &format, &nitems, &extra, &data );
00648     if (status  == Success )
00649         {
00650         if (data && nitems > 0)
00651             result = *((long*) data);
00652         XFree(data);
00653         }
00654     return result;       
00655     }
00656 
00657 void Client::demandAttention( bool set )
00658     {
00659     if( isActive())
00660         set = false;
00661     if( demands_attention == set )
00662         return;
00663     demands_attention = set;
00664     if( demands_attention )
00665         {
00666         // Demand attention flag is often set right from manage(), when focus stealing prevention
00667         // steps in. At that time the window has no taskbar entry yet, so KNotify cannot place
00668         // e.g. the passive popup next to it. So wait up to 1 second for the icon geometry
00669         // to be set.
00670         // Delayed call to KNotify also solves the problem of having X server grab in manage(),
00671         // which may deadlock when KNotify (or KLauncher when launching KNotify) need to access X.
00672         Notify::Event e = isOnCurrentDesktop() ? Notify::DemandAttentionCurrent : Notify::DemandAttentionOther;
00673         // Setting the demands attention state needs to be done directly in KWin, because
00674         // KNotify would try to set it, resulting in a call to KNotify again, etc.
00675         if( Notify::makeDemandAttention( e ))
00676             info->setState( set ? NET::DemandsAttention : 0, NET::DemandsAttention );
00677 
00678         if( demandAttentionKNotifyTimer == NULL )
00679             {
00680             demandAttentionKNotifyTimer = new QTimer( this );
00681             connect( demandAttentionKNotifyTimer, SIGNAL( timeout()), SLOT( demandAttentionKNotify()));
00682             }
00683         demandAttentionKNotifyTimer->start( 1000, true );
00684         }
00685     else
00686         info->setState( set ? NET::DemandsAttention : 0, NET::DemandsAttention );
00687     workspace()->clientAttentionChanged( this, set );
00688     }
00689 
00690 void Client::demandAttentionKNotify()
00691     {
00692     Notify::Event e = isOnCurrentDesktop() ? Notify::DemandAttentionCurrent : Notify::DemandAttentionOther;
00693     Notify::raise( e, i18n( "Window '%1' demands attention." ).arg( KStringHandler::csqueeze(caption())), this );
00694     demandAttentionKNotifyTimer->stop();
00695     demandAttentionKNotifyTimer->deleteLater();
00696     demandAttentionKNotifyTimer = NULL;
00697     }
00698 
00699 // TODO I probably shouldn't be lazy here and do it without the macro, so that people can read it
00700 KWIN_COMPARE_PREDICATE( SameApplicationActiveHackPredicate, const Client*,
00701     // ignore already existing splashes, toolbars, utilities, menus and topmenus,
00702     // as the app may show those before the main window
00703     !cl->isSplash() && !cl->isToolbar() && !cl->isTopMenu() && !cl->isUtility() && !cl->isMenu()
00704     && Client::belongToSameApplication( cl, value, true ) && cl != value);
00705 
00706 Time Client::readUserTimeMapTimestamp( const KStartupInfoId* asn_id, const KStartupInfoData* asn_data,
00707     bool session ) const
00708     {
00709     Time time = info->userTime();
00710 //    kdDebug( 1212 ) << "User timestamp, initial:" << time << endl;
00711     // newer ASN timestamp always replaces user timestamp, unless user timestamp is 0
00712     // helps e.g. with konqy reusing
00713     if( asn_data != NULL && time != 0 )
00714         {
00715         // prefer timestamp from ASN id (timestamp from data is obsolete way)
00716         if( asn_id->timestamp() != 0
00717             && ( time == -1U || timestampCompare( asn_id->timestamp(), time ) > 0 ))
00718             {
00719             time = asn_id->timestamp();
00720             }
00721         else if( asn_data->timestamp() != -1U
00722             && ( time == -1U || timestampCompare( asn_data->timestamp(), time ) > 0 ))
00723             {
00724             time = asn_data->timestamp();
00725             }
00726         }
00727 //    kdDebug( 1212 ) << "User timestamp, ASN:" << time << endl;
00728     if( time == -1U )
00729         { // The window doesn't have any timestamp.
00730       // If it's the first window for its application
00731       // (i.e. there's no other window from the same app),
00732       // use the _KDE_NET_WM_USER_CREATION_TIME trick.
00733       // Otherwise, refuse activation of a window
00734       // from already running application if this application
00735       // is not the active one (unless focus stealing prevention is turned off).
00736         Client* act = workspace()->mostRecentlyActivatedClient();
00737         if( act != NULL && !belongToSameApplication( act, this, true ))
00738             {
00739             bool first_window = true;
00740             if( isTransient())
00741                 {
00742                 if( act->hasTransient( this, true ))
00743                     ; // is transient for currently active window, even though it's not
00744                       // the same app (e.g. kcookiejar dialog) -> allow activation
00745                 else if( groupTransient() &&
00746                     findClientInList( mainClients(), SameApplicationActiveHackPredicate( this )) == NULL )
00747                     ; // standalone transient
00748                 else
00749                     first_window = false;
00750                 }
00751             else
00752                 {
00753                 if( workspace()->findClient( SameApplicationActiveHackPredicate( this )))
00754                     first_window = false;
00755                 }
00756             // don't refuse if focus stealing prevention is turned off
00757             if( !first_window && rules()->checkFSP( options->focusStealingPreventionLevel ) > 0 )
00758                 {
00759 //                kdDebug( 1212 ) << "User timestamp, already exists:" << 0 << endl;
00760                 return 0; // refuse activation
00761                 }
00762             }
00763         // Creation time would just mess things up during session startup,
00764         // as possibly many apps are started up at the same time.
00765         // If there's no active window yet, no timestamp will be needed,
00766         // as plain Workspace::allowClientActivation() will return true
00767         // in such case. And if there's already active window,
00768         // it's better not to activate the new one.
00769         // Unless it was the active window at the time
00770         // of session saving and there was no user interaction yet,
00771         // this check will be done in manage().
00772         if( session )
00773             return -1U;
00774         if( ignoreFocusStealing() && act != NULL )
00775             time = act->userTime();
00776         else
00777             time = readUserCreationTime();
00778         }
00779 //    kdDebug( 1212 ) << "User timestamp, final:" << this << ":" << time << endl;
00780     return time;
00781     }
00782 
00783 Time Client::userTime() const
00784     {
00785     Time time = user_time;
00786     if( time == 0 ) // doesn't want focus after showing
00787         return 0;
00788     assert( group() != NULL );
00789     if( time == -1U
00790          || ( group()->userTime() != -1U
00791                  && timestampCompare( group()->userTime(), time ) > 0 ))
00792         time = group()->userTime();
00793     return time;
00794     }
00795 
00807 void Client::setActive( bool act, bool updateOpacity_)
00808     {
00809     if ( active == act )
00810         return;
00811     active = act;
00812     workspace()->setActiveClient( act ? this : NULL, Allowed );
00813     
00814     if (updateOpacity_) updateOpacity();
00815     if (isModal() && transientFor())
00816     {
00817         if (!act) transientFor()->updateOpacity();
00818         else if (!transientFor()->custom_opacity) transientFor()->setOpacity(options->translucentActiveWindows, options->activeWindowOpacity);
00819     }
00820     updateShadowSize();
00821     
00822     if ( active )
00823         Notify::raise( Notify::Activate );
00824 
00825     if( !active )
00826         cancelAutoRaise();
00827 
00828     if( !active && shade_mode == ShadeActivated )
00829         setShade( ShadeNormal );
00830         
00831     StackingUpdatesBlocker blocker( workspace());
00832     workspace()->updateClientLayer( this ); // active windows may get different layer
00833     // TODO optimize? mainClients() may be a bit expensive
00834     ClientList mainclients = mainClients();
00835     for( ClientList::ConstIterator it = mainclients.begin();
00836          it != mainclients.end();
00837          ++it )
00838         if( (*it)->isFullScreen()) // fullscreens go high even if their transient is active
00839             workspace()->updateClientLayer( *it );
00840     if( decoration != NULL )
00841         decoration->activeChange();
00842     updateMouseGrab();
00843     updateUrgency(); // demand attention again if it's still urgent
00844     }
00845 
00846 void Client::startupIdChanged()
00847     {
00848     KStartupInfoId asn_id;
00849     KStartupInfoData asn_data;
00850     bool asn_valid = workspace()->checkStartupNotification( window(), asn_id, asn_data );
00851     if( !asn_valid )
00852         return;
00853     // If the ASN contains desktop, move it to the desktop, otherwise move it to the current
00854     // desktop (since the new ASN should make the window act like if it's a new application
00855     // launched). However don't affect the window's desktop if it's set to be on all desktops.
00856     int desktop = workspace()->currentDesktop();
00857     if( asn_data.desktop() != 0 )
00858         desktop = asn_data.desktop();
00859     if( !isOnAllDesktops())
00860         workspace()->sendClientToDesktop( this, desktop, true );
00861     Time timestamp = asn_id.timestamp();
00862     if( timestamp == 0 && asn_data.timestamp() != -1U )
00863         timestamp = asn_data.timestamp();
00864     if( timestamp != 0 )
00865         {
00866         bool activate = workspace()->allowClientActivation( this, timestamp );
00867         if( asn_data.desktop() != 0 && !isOnCurrentDesktop())
00868             activate = false; // it was started on different desktop than current one
00869         if( activate )
00870             workspace()->activateClient( this );
00871         else
00872             demandAttention();
00873         }
00874     }
00875 
00876 void Client::updateUrgency()
00877     {
00878     if( urgency )
00879         demandAttention();
00880     }
00881 
00882 void Client::shortcutActivated()
00883     {
00884     workspace()->activateClient( this, true ); // force
00885     }
00886 
00887 //****************************************
00888 // Group
00889 //****************************************
00890     
00891 void Group::startupIdChanged()
00892     {
00893     KStartupInfoId asn_id;
00894     KStartupInfoData asn_data;
00895     bool asn_valid = workspace()->checkStartupNotification( leader_wid, asn_id, asn_data );
00896     if( !asn_valid )
00897         return;
00898     if( asn_id.timestamp() != 0 && user_time != -1U
00899         && timestampCompare( asn_id.timestamp(), user_time ) > 0 )
00900         {
00901         user_time = asn_id.timestamp();
00902         }
00903     else if( asn_data.timestamp() != -1U && user_time != -1U
00904         && timestampCompare( asn_data.timestamp(), user_time ) > 0 )
00905         {
00906         user_time = asn_data.timestamp();
00907         }
00908     }
00909 
00910 void Group::updateUserTime( Time time )
00911     { // copy of Client::updateUserTime
00912     if( time == CurrentTime )
00913         time = qt_x_time;
00914     if( time != -1U
00915         && ( user_time == CurrentTime
00916             || timestampCompare( time, user_time ) > 0 )) // time > user_time
00917         user_time = time;
00918     }
00919 
00920 } // namespace
KDE Home | KDE Accessibility Home | Description of Access Keys