kwin Library API Documentation

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 
00027 #include "notifications.h"
00028 #include "atoms.h"
00029 #include "group.h"
00030 #include "rules.h"
00031 
00032 extern Time qt_x_time;
00033 
00034 namespace KWinInternal
00035 {
00036 
00037 /*
00038  Prevention of focus stealing:
00039 
00040  KWin tries to prevent unwanted changes of focus, that would result
00041  from mapping a new window. Also, some nasty applications may try
00042  to force focus change even in cases when ICCCM 4.2.7 doesn't allow it
00043  (e.g. they may try to activate their main window because the user
00044  definitely "needs" to see something happened - misusing
00045  of QWidget::setActiveWindow() may be such case).
00046 
00047  There are 4 ways how a window may become active:
00048  - the user changes the active window (e.g. focus follows mouse, clicking
00049    on some window's titlebar) - the change of focus will
00050    be done by KWin, so there's nothing to solve in this case
00051  - the change of active window will be requested using the _NET_ACTIVE_WINDOW
00052    message (handled in RootInfo::changeActiveWindow()) - such requests
00053    will be obeyed, because this request is meant mainly for e.g. taskbar
00054    asking the WM to change the active window as a result of some user action.
00055    Normal applications should use this request only rarely in special cases.
00056    See also below the discussion of _NET_ACTIVE_WINDOW_TRANSFER.
00057  - the change of active window will be done by performing XSetInputFocus()
00058    on a window that's not currently active. ICCCM 4.2.7 describes when
00059    the application may perform change of input focus. In order to handle
00060    misbehaving applications, KWin will try to detect focus changes to
00061    windows that don't belong to currently active application, and restore
00062    focus back to the currently active window, instead of activating the window
00063    that got focus (unfortunately there's no way to FocusChangeRedirect similar
00064    to e.g. SubstructureRedirect, so there will be short time when the focus
00065    will be changed). The check itself that's done is
00066    Workspace::allowClientActivation() (see below).
00067  - a new window will be mapped - this is the most complicated case. If
00068    the new window belongs to the currently active application, it may be safely
00069    mapped on top and activated. The same if there's no active window,
00070    or the active window is the desktop. These checks are done by
00071    Workspace::allowClientActivation().
00072     Following checks need to compare times. One time is the timestamp
00073    of last user action in the currently active window, the other time is
00074    the timestamp of the action that originally caused mapping of the new window
00075    (e.g. when the application was started). If the first time is newer than
00076    the second one, the window will not be activated, as that indicates
00077    futher user actions took place after the action leading to this new
00078    mapped window. This check is done by Workspace::allowClientActivation().
00079     There are several ways how to get the timestamp of action that caused
00080    the new mapped window (done in Client::readUserTimeMapTimestamp()) :
00081      - the window may have the _NET_WM_USER_TIME property. This way
00082        the application may either explicitly request that the window is not
00083        activated (by using 0 timestamp), or the property contains the time
00084        of last user action in the application.
00085      - KWin itself tries to detect time of last user action in every window,
00086        by watching KeyPress and ButtonPress events on windows. This way some
00087        events may be missed (if they don't propagate to the toplevel window),
00088        but it's good as a fallback for applications that don't provide
00089        _NET_WM_USER_TIME, and missing some events may at most lead
00090        to unwanted focus stealing.
00091      - the timestamp may come from application startup notification.
00092        Application startup notification, if it exists for the new mapped window,
00093        should include time of the user action that caused it.
00094      - if there's no timestamp available, it's checked whether the new window
00095        belongs to some already running application - if yes, the timestamp
00096        will be 0 (i.e. refuse activation)
00097      - if the window is from session restored window, the timestamp will
00098        be 0 too, unless this application was the active one at the time
00099        when the session was saved, in which case the window will be
00100        activated if there wasn't any user interaction since the time
00101        KWin was started.
00102      - as the last resort, the _KDE_NET_USER_CREATION_TIME timestamp
00103        is used. For every toplevel window that is created (see CreateNotify
00104        handling), this property is set to the at that time current time.
00105        Since at this time it's known that the new window doesn't belong
00106        to any existing application (better said, the application doesn't
00107        have any other window mapped), it is either the very first window
00108        of the application, or its the only window of the application
00109        that was hidden before. The latter case is handled by removing
00110        the property from windows before withdrawing them, making
00111        the timestamp empty for next mapping of the window. In the sooner
00112        case, the timestamp will be used. This helps in case when
00113        an application is launched without application startup notification,
00114        it creates its mainwindow, and starts its initialization (that
00115        may possibly take long time). The timestamp used will be older
00116        than any user action done after launching this application.
00117      - if no timestamp is found at all, the window is activated.
00118     The check whether two windows belong to the same application (same
00119    process) is done in Client::belongToSameApplication(). Not 100% reliable,
00120    but hopefully 99,99% reliable.
00121 
00122  As a somewhat special case, window activation is always enabled when
00123  session saving is in progress. When session saving, the session
00124  manager allows only one application to interact with the user.
00125  Not allowing window activation in such case would result in e.g. dialogs
00126  not becoming active, so focus stealing prevention would cause here
00127  more harm than good.
00128 
00129  Windows that attempted to become active but KWin prevented this will
00130  be marked as demanding user attention. They'll get
00131  the _NET_WM_STATE_DEMANDS_ATTENTION state, and the taskbar should mark
00132  them specially (blink, etc.). The state will be reset when the window
00133  eventually really becomes active.
00134 
00135  There are one more ways how a window can become obstrusive, window stealing
00136  focus: By showing above the active window, by either raising itself,
00137  or by moving itself on the active desktop.
00138      - KWin will refuse raising non-active window above the active one,
00139          unless they belong to the same application. Applications shouldn't
00140          raise their windows anyway (unless the app wants to raise one
00141          of its windows above another of its windows).
00142      - KWin activates windows moved to the current desktop (as that seems
00143          logical from the user's point of view, after sending the window
00144          there directly from KWin, or e.g. using pager). This means
00145          applications shouldn't send their windows to another desktop
00146          (SELI TODO - but what if they do?)
00147 
00148  Special cases I can think of:
00149     - konqueror reusing, i.e. kfmclient tells running Konqueror instance
00150         to open new window
00151         - without focus stealing prevention - no problem
00152         - with ASN (application startup notification) - ASN is forwarded,
00153             and because it's newer than the instance's user timestamp,
00154             it takes precedence
00155         - without ASN - user timestamp needs to be reset, otherwise it would
00156             be used, and it's old; moreover this new window mustn't be detected
00157             as window belonging to already running application, or it wouldn't
00158             be activated - see Client::sameAppWindowRoleMatch() for the (rather ugly)
00159             hack
00160     - konqueror preloading, i.e. window is created in advance, and kfmclient
00161         tells this Konqueror instance to show it later
00162         - without focus stealing prevention - no problem
00163         - with ASN - ASN is forwarded, and because it's newer than the instance's
00164             user timestamp, it takes precedence
00165         - without ASN - user timestamp needs to be reset, otherwise it would
00166             be used, and it's old; also, creation timestamp is changed to
00167             the time the instance starts (re-)initializing the window,
00168             this ensures creation timestamp will still work somewhat even in this case
00169     - KUniqueApplication - when the window is already visible, and the new instance
00170         wants it to activate
00171         - without focus stealing prevention - _NET_ACTIVE_WINDOW - no problem
00172         - with ASN - ASN is forwarded, and set on the already visible window, KWin
00173             treats the window as new with that ASN
00174         - without ASN - _NET_ACTIVE_WINDOW as application request is used,
00175                 and there's no really usable timestamp, only timestamp
00176                 from the time the (new) application instance was started,
00177                 so KWin will activate the window *sigh*
00178                 - the bad thing here is that there's absolutely no chance to recognize
00179                     the case of starting this KUniqueApp from Konsole (and thus wanting
00180                     the already visible window to become active) from the case
00181                     when something started this KUniqueApp without ASN (in which case
00182                     the already visible window shouldn't become active)
00183                 - the only solution is using ASN for starting applications, at least silent
00184                     (i.e. without feedback)
00185     - when one application wants to activate another application's window (e.g. KMail
00186         activating already running KAddressBook window ?)
00187         - without focus stealing prevention - _NET_ACTIVE_WINDOW - no problem
00188         - with ASN - can't be here, it's the KUniqueApp case then
00189         - without ASN - _NET_ACTIVE_WINDOW as application request should be used,
00190             KWin will activate the new window depending on the timestamp and
00191             whether it belongs to the currently active application
00192 
00193  _NET_ACTIVE_WINDOW usage:
00194  data.l[0]= 1 ->app request
00195           = 2 ->pager request
00196           = 0 - backwards compatibility
00197  data.l[1]= timestamp
00198 */
00199 
00200 
00201 //****************************************
00202 // Workspace
00203 //****************************************
00204 
00205 
00214 void Workspace::setActiveClient( Client* c, allowed_t )
00215     {
00216     if ( active_client == c )
00217         return;
00218     if( popup && popup_client != c && set_active_client_recursion == 0 ) 
00219         {
00220         popup->close();
00221         popup_client = 0;
00222         }
00223     StackingUpdatesBlocker blocker( this );
00224     ++set_active_client_recursion;
00225     if( active_client != NULL )
00226         { // note that this may call setActiveClient( NULL ), therefore the recursion counter
00227         active_client->setActive( false );
00228         }
00229     active_client = c;
00230     Q_ASSERT( c == NULL || c->isActive());
00231     if( active_client != NULL )
00232         last_active_client = active_client;
00233     if ( active_client ) 
00234         {
00235         focus_chain.remove( c );
00236         if ( c->wantsTabFocus() )
00237             focus_chain.append( c );
00238         active_client->demandAttention( false );
00239         }
00240     pending_take_activity = NULL;
00241 
00242     updateCurrentTopMenu();
00243     updateToolWindows( false );
00244 
00245     updateStackingOrder(); // e.g. fullscreens have different layer when active/not-active
00246 
00247     rootInfo->setActiveWindow( active_client? active_client->window() : 0 );
00248     updateColormap();
00249     --set_active_client_recursion;
00250     }
00251 
00263 void Workspace::activateClient( Client* c, bool force )
00264     {
00265     if( c == NULL )
00266         {
00267         setActiveClient( NULL, Allowed );
00268         return;
00269         }
00270     raiseClient( c );
00271     if (!c->isOnDesktop(currentDesktop()) )
00272         {
00273         ++block_focus;
00274         setCurrentDesktop( c->desktop() );
00275         --block_focus;
00276         // popupinfo->showInfo( desktopName(currentDesktop()) ); // AK - not sure
00277         }
00278     if( c->isMinimized())
00279         c->unminimize();
00280 
00281     if( options->focusPolicyIsReasonable())
00282         requestFocus( c, force );
00283 
00284     // Don't update user time for clients that have focus stealing workaround.
00285     // As they usually belong to the current active window but fail to provide
00286     // this information, updating their user time would make the user time
00287     // of the currently active window old, and reject further activation for it.
00288     // E.g. typing URL in minicli which will show kio_uiserver dialog (with workaround),
00289     // and then kdesktop shows dialog about SSL certificate.
00290     // This needs also avoiding user creation time in Client::readUserTimeMapTimestamp().
00291     if( !c->ignoreFocusStealing())
00292         c->updateUserTime();
00293     }
00294 
00302 void Workspace::requestFocus( Client* c, bool force )
00303     {
00304     takeActivity( c, ActivityFocus | ( force ? ActivityFocusForce : 0 ), false);
00305     }
00306     
00307 void Workspace::takeActivity( Client* c, int flags, bool handled )
00308     {
00309      // the 'if( c == active_client ) return;' optimization mustn't be done here
00310     if (!focusChangeEnabled() && ( c != active_client) )
00311         flags &= ~ActivityFocus;
00312 
00313     if ( !c ) 
00314         {
00315         focusToNull();
00316         return;
00317         }
00318 
00319     if( flags & ActivityFocus )
00320         {
00321         Client* modal = c->findModal();
00322         if( modal != NULL && modal != c )   
00323             { 
00324             if( !modal->isOnDesktop( c->desktop()))
00325                 {
00326                 modal->setDesktop( c->desktop());
00327                 if( modal->desktop() != c->desktop()) // forced desktop
00328                     activateClient( modal );
00329                 }
00330             // if the click was inside the window (i.e. handled is set),
00331             // but it has a modal, there's no need to use handled mode, because
00332             // the modal doesn't get the click anyway
00333             // raising of the original window needs to be still done
00334             if( flags & ActivityRaise )
00335                 raiseClient( c );
00336             flags &= ~ActivityRaise;
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 void 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;
00394     if( popup )
00395         popup->close();
00396     if( c == active_client )
00397         setActiveClient( NULL, Allowed );
00398     should_get_focus.remove( c );
00399     if( focusChangeEnabled())
00400         {
00401         if ( c->wantsTabFocus() && focus_chain.contains( c ) )
00402             {
00403             focus_chain.remove( c );
00404             focus_chain.prepend( c );
00405             }
00406         if ( options->focusPolicyIsReasonable())
00407             { // search the focus_chain for a client to transfer focus to
00408           // if 'c' is transient, transfer focus to the first suitable mainwindow
00409             Client* get_focus = NULL;
00410             const ClientList mainwindows = c->mainClients();
00411             for( ClientList::ConstIterator it = focus_chain.fromLast();
00412                  it != focus_chain.end();
00413                  --it )
00414                 {
00415                 if( !(*it)->isShown( false ) || !(*it)->isOnCurrentDesktop())
00416                     continue;
00417                 if( mainwindows.contains( *it ))
00418                     {
00419                     get_focus = *it;
00420                     break;
00421                     }
00422                 if( get_focus == NULL )
00423                     get_focus = *it;
00424                 }
00425             if( get_focus == NULL )
00426                 get_focus = findDesktop( true, currentDesktop());
00427             if( get_focus != NULL )
00428                 requestFocus( get_focus );
00429             else
00430                 focusToNull();
00431             }
00432         }
00433     else
00434         // if blocking focus, move focus to the desktop later if needed
00435         // in order to avoid flickering
00436         focusToNull();
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     }
00634 
00635 Time Client::readUserCreationTime() const
00636     {
00637     long result = -1; // Time == -1 means none
00638     Atom type;
00639     int format, status;
00640     unsigned long nitems = 0;
00641     unsigned long extra = 0;
00642     unsigned char *data = 0;
00643     KXErrorHandler handler; // ignore errors?
00644     status = XGetWindowProperty( qt_xdisplay(), window(),
00645         atoms->kde_net_wm_user_creation_time, 0, 10000, FALSE, XA_CARDINAL,
00646         &type, &format, &nitems, &extra, &data );
00647     if (status  == Success )
00648         {
00649         if (data && nitems > 0)
00650             result = *((long*) data);
00651         XFree(data);
00652         }
00653     return result;       
00654     }
00655 
00656 void Client::demandAttention( bool set )
00657     {
00658     if( isActive())
00659         set = false;
00660     info->setState( set ? NET::DemandsAttention : 0, NET::DemandsAttention );
00661     workspace()->clientAttentionChanged( this, set );
00662     }
00663 
00664 // TODO I probably shouldn't be lazy here and do it without the macro, so that people can read it
00665 KWIN_COMPARE_PREDICATE( SameApplicationActiveHackPredicate, const Client*,
00666     // ignore already existing splashes, toolbars, utilities, menus and topmenus,
00667     // as the app may show those before the main window
00668     !cl->isSplash() && !cl->isToolbar() && !cl->isTopMenu() && !cl->isUtility() && !cl->isMenu()
00669     && Client::belongToSameApplication( cl, value, true ) && cl != value);
00670 
00671 Time Client::readUserTimeMapTimestamp( const KStartupInfoId* asn_id, const KStartupInfoData* asn_data,
00672     bool session ) const
00673     {
00674     Time time = info->userTime();
00675     kdDebug( 1212 ) << "User timestamp, initial:" << time << endl;
00676     // newer ASN timestamp always replaces user timestamp, unless user timestamp is 0
00677     // helps e.g. with konqy reusing
00678     if( asn_data != NULL && time != 0 )
00679         {
00680         // prefer timestamp from ASN id (timestamp from data is obsolete way)
00681         if( asn_id->timestamp() != 0
00682             && ( time == -1U || timestampCompare( asn_id->timestamp(), time ) > 0 ))
00683             {
00684             time = asn_id->timestamp();
00685             }
00686         else if( asn_data->timestamp() != -1U
00687             && ( time == -1U || timestampCompare( asn_data->timestamp(), time ) > 0 ))
00688             {
00689             time = asn_data->timestamp();
00690             }
00691         }
00692     kdDebug( 1212 ) << "User timestamp, ASN:" << time << endl;
00693     if( time == -1U )
00694         { // The window doesn't have any timestamp.
00695       // If it's the first window for its application
00696       // (i.e. there's no other window from the same app),
00697       // use the _KDE_NET_WM_USER_CREATION_TIME trick.
00698       // Otherwise, refuse activation of a window
00699       // from already running application if this application
00700       // is not the active one (unless focus stealing prevention is turned off).
00701         Client* act = workspace()->mostRecentlyActivatedClient();
00702         if( act != NULL && !belongToSameApplication( act, this, true ))
00703             {
00704             bool first_window = true;
00705             if( isTransient())
00706                 {
00707                 if( act->hasTransient( this, true ))
00708                     ; // is transient for currently active window, even though it's not
00709                       // the same app (e.g. kcookiejar dialog) -> allow activation
00710                 else if( groupTransient() &&
00711                     findClientInList( mainClients(), SameApplicationActiveHackPredicate( this )) == NULL )
00712                     ; // standalone transient
00713                 else
00714                     first_window = false;
00715                 }
00716             else
00717                 {
00718                 if( workspace()->findClient( SameApplicationActiveHackPredicate( this )))
00719                     first_window = false;
00720                 }
00721             // don't refuse if focus stealing prevention is turned off
00722             if( !first_window && rules()->checkFSP( options->focusStealingPreventionLevel ) > 0 )
00723                 {
00724                 kdDebug( 1212 ) << "User timestamp, already exists:" << 0 << endl;
00725                 return 0; // refuse activation
00726                 }
00727             }
00728         // Creation time would just mess things up during session startup,
00729         // as possibly many apps are started up at the same time.
00730         // If there's no active window yet, no timestamp will be needed,
00731         // as plain Workspace::allowClientActivation() will return true
00732         // in such case. And if there's already active window,
00733         // it's better not to activate the new one.
00734         // Unless it was the active window at the time
00735         // of session saving and there was no user interaction yet,
00736         // this check will be done in manage().
00737         if( session )
00738             return -1U;
00739         if( ignoreFocusStealing() && act != NULL )
00740             time = act->userTime();
00741         else
00742             time = readUserCreationTime();
00743         }
00744     kdDebug( 1212 ) << "User timestamp, final:" << this << ":" << time << endl;
00745     return time;
00746     }
00747 
00748 Time Client::userTime() const
00749     {
00750     Time time = user_time;
00751     if( time == 0 ) // doesn't want focus after showing
00752         return 0;
00753     assert( group() != NULL );
00754     if( time == -1U
00755          || ( group()->userTime() != -1U
00756                  && timestampCompare( group()->userTime(), time ) > 0 ))
00757         time = group()->userTime();
00758     return time;
00759     }
00760 
00772 void Client::setActive( bool act)
00773     {
00774     if ( active == act )
00775         return;
00776     active = act;
00777     workspace()->setActiveClient( act ? this : NULL, Allowed );
00778 
00779     if ( active )
00780         Notify::raise( Notify::Activate );
00781 
00782     if( !active )
00783         cancelAutoRaise();
00784 
00785     if( !active && shade_mode == ShadeActivated )
00786         setShade( ShadeNormal );
00787 
00788     StackingUpdatesBlocker blocker( workspace());
00789     workspace()->updateClientLayer( this ); // active windows may get different layer
00790     // TODO optimize? mainClients() may be a bit expensive
00791     ClientList mainclients = mainClients();
00792     for( ClientList::ConstIterator it = mainclients.begin();
00793          it != mainclients.end();
00794          ++it )
00795         if( (*it)->isFullScreen()) // fullscreens go high even if their transient is active
00796             workspace()->updateClientLayer( *it );
00797     if( decoration != NULL )
00798         decoration->activeChange();
00799     updateMouseGrab();
00800     updateUrgency(); // demand attention again if it's still urgent
00801     }
00802 
00803 void Client::startupIdChanged()
00804     {
00805     KStartupInfoId asn_id;
00806     KStartupInfoData asn_data;
00807     bool asn_valid = workspace()->checkStartupNotification( window(), asn_id, asn_data );
00808     if( !asn_valid )
00809         return;
00810     if( asn_data.desktop() != 0 )
00811         workspace()->sendClientToDesktop( this, asn_data.desktop(), true );
00812     Time timestamp = asn_id.timestamp();
00813     if( timestamp == 0 && asn_data.timestamp() != -1U )
00814         timestamp = asn_data.timestamp();
00815     if( timestamp != 0 )
00816         {
00817         bool activate = workspace()->allowClientActivation( this, timestamp );
00818         if( asn_data.desktop() != 0 && !isOnCurrentDesktop())
00819             activate = false; // it was started on different desktop than current one
00820         if( activate )
00821             workspace()->activateClient( this );
00822         else
00823             demandAttention();
00824         }
00825     }
00826 
00827 void Client::updateUrgency()
00828     {
00829     if( urgency )
00830         demandAttention();
00831     }
00832 
00833 //****************************************
00834 // Group
00835 //****************************************
00836     
00837 void Group::startupIdChanged()
00838     {
00839     KStartupInfoId asn_id;
00840     KStartupInfoData asn_data;
00841     bool asn_valid = workspace()->checkStartupNotification( leader_wid, asn_id, asn_data );
00842     if( !asn_valid )
00843         return;
00844     if( asn_id.timestamp() != 0 && user_time != -1U
00845         && timestampCompare( asn_id.timestamp(), user_time ) > 0 )
00846         {
00847         user_time = asn_id.timestamp();
00848         }
00849     else if( asn_data.timestamp() != -1U && user_time != -1U
00850         && timestampCompare( asn_data.timestamp(), user_time ) > 0 )
00851         {
00852         user_time = asn_data.timestamp();
00853         }
00854     }
00855 
00856 void Group::updateUserTime( Time time )
00857     { // copy of Client::updateUserTime
00858     if( time == CurrentTime )
00859         time = qt_x_time;
00860     if( time != -1U
00861         && ( user_time == CurrentTime
00862             || timestampCompare( time, user_time ) > 0 )) // time > user_time
00863         user_time = time;
00864     }
00865 
00866 } // namespace
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This file is part of the documentation for kwin Library Version 3.3.90.
Documentation copyright © 1996-2004 the KDE developers.
Generated on Mon Apr 4 11:21:57 2005 by doxygen 1.3.9.1 written by Dimitri van Heesch, © 1997-2003