• Skip to content
  • Skip to link menu
Trinity API Reference
  • Trinity API Reference
  • kwin
 

kwin

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 <tqpopupmenu.h>
00020 #include <kxerrorhandler.h>
00021 #include <kstartupinfo.h>
00022 #include <kstringhandler.h>
00023 #include <klocale.h>
00024 
00025 #include "client.h"
00026 #include "workspace.h"
00027 #include <fixx11h.h>
00028 
00029 #include "notifications.h"
00030 #include "atoms.h"
00031 #include "group.h"
00032 #include "rules.h"
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 TQWidget::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( active_popup && active_popup_client != c && set_active_client_recursion == 0 ) 
00219         closeActivePopup();
00220     StackingUpdatesBlocker blocker( this );
00221     ++set_active_client_recursion;
00222     updateFocusMousePosition( TQCursor::pos());
00223     if( active_client != NULL )
00224         { // note that this may call setActiveClient( NULL ), therefore the recursion counter
00225         active_client->setActive( false, !c || !c->isModal() || c != active_client->transientFor() );
00226         }
00227     active_client = c;
00228     if (set_active_client_recursion == 1)
00229         {
00230         // Only unset next_active_client if activateClient() wasn't called by
00231         // Client::setActive() to set the active window to null before
00232         // activating another window.
00233         next_active_client = NULL;
00234         }
00235     Q_ASSERT( c == NULL || c->isActive());
00236     if( active_client != NULL )
00237         last_active_client = active_client;
00238     if ( active_client ) 
00239         {
00240         updateFocusChains( active_client, FocusChainMakeFirst );
00241         active_client->demandAttention( false );
00242         }
00243     pending_take_activity = NULL;
00244 
00245     updateCurrentTopMenu();
00246     updateToolWindows( false );
00247     if( c )
00248         disableGlobalShortcutsForClient( c->rules()->checkDisableGlobalShortcuts( false ));
00249     else
00250         disableGlobalShortcutsForClient( false );
00251 
00252     updateStackingOrder(); // e.g. fullscreens have different layer when active/not-active
00253 
00254     rootInfo->setActiveWindow( active_client? active_client->window() : 0 );
00255     updateColormap();
00256     --set_active_client_recursion;
00257     }
00258 
00270 void Workspace::activateClient( Client* c, bool force )
00271     {
00272     if( c == NULL )
00273         {
00274         focusToNull();
00275         setActiveClient( NULL, Allowed );
00276         return;
00277         }
00278     raiseClient( c );
00279     if (!c->isOnDesktop(currentDesktop()) )
00280         {
00281         ++block_focus;
00282         setCurrentDesktop( c->desktop() );
00283         --block_focus;
00284         }
00285     if( c->isMinimized())
00286         c->unminimize();
00287 
00288 // TODO force should perhaps allow this only if the window already contains the mouse
00289     if( options->focusPolicyIsReasonable() || force )
00290         requestFocus( c, force );
00291 
00292     // Don't update user time for clients that have focus stealing workaround.
00293     // As they usually belong to the current active window but fail to provide
00294     // this information, updating their user time would make the user time
00295     // of the currently active window old, and reject further activation for it.
00296     // E.g. typing URL in minicli which will show kio_uiserver dialog (with workaround),
00297     // and then kdesktop shows dialog about SSL certificate.
00298     // This needs also avoiding user creation time in Client::readUserTimeMapTimestamp().
00299     if( !c->ignoreFocusStealing())
00300         c->updateUserTime();
00301     }
00302 
00310 void Workspace::requestFocus( Client* c, bool force )
00311     {
00312     takeActivity( c, ActivityFocus | ( force ? ActivityFocusForce : 0 ), false);
00313     }
00314     
00315 void Workspace::takeActivity( Client* c, int flags, bool handled )
00316     {
00317      // the 'if( c == active_client ) return;' optimization mustn't be done here
00318     if (!focusChangeEnabled() && ( c != active_client) )
00319         flags &= ~ActivityFocus;
00320 
00321     if ( !c ) 
00322         {
00323         focusToNull();
00324         return;
00325         }
00326 
00327     if( flags & ActivityFocus )
00328         {
00329         Client* modal = c->findModal();
00330         if( modal != NULL && modal != c )   
00331             { 
00332             next_active_client = modal;
00333             if( !modal->isOnDesktop( c->desktop()))
00334                 {
00335                 modal->setDesktop( c->desktop());
00336                 if( modal->desktop() != c->desktop()) // forced desktop
00337                     activateClient( modal );
00338                 }
00339             // if the click was inside the window (i.e. handled is set),
00340             // but it has a modal, there's no need to use handled mode, because
00341             // the modal doesn't get the click anyway
00342             // raising of the original window needs to be still done
00343             if( flags & ActivityRaise )
00344                 raiseClient( c );
00345             c = modal;
00346             handled = false;
00347             }
00348         cancelDelayFocus();
00349         }
00350     if ( !( flags & ActivityFocusForce ) && ( c->isTopMenu() || c->isDock() || c->isSplash()) )
00351         flags &= ~ActivityFocus; // toplevel menus and dock windows don't take focus if not forced
00352     if( c->isShade())
00353         {
00354         if( c->wantsInput() && ( flags & ActivityFocus ))
00355             {
00356         // client cannot accept focus, but at least the window should be active (window menu, et. al. )
00357             c->setActive( true );
00358             focusToNull();
00359             }
00360     if( c->wantsInput())
00361         next_active_client = c;
00362         flags &= ~ActivityFocus;
00363         handled = false; // no point, can't get clicks
00364         }
00365     if( !c->isShown( true )) // shouldn't happen, call activateClient() if needed
00366         {
00367     next_active_client = c;
00368         kdWarning( 1212 ) << "takeActivity: not shown" << endl;
00369         return;
00370         }
00371     c->takeActivity( flags, handled, Allowed );
00372     if( !c->isOnScreen( active_screen ))
00373         active_screen = c->screen();
00374     }
00375 
00376 void Workspace::handleTakeActivity( Client* c, Time /*timestamp*/, int flags )
00377     {
00378     if( pending_take_activity != c ) // pending_take_activity is reset when doing restack or activation
00379         return;
00380     if(( flags & ActivityRaise ) != 0 )
00381         raiseClient( c );
00382     if(( flags & ActivityFocus ) != 0 && c->isShown( false ))
00383         c->takeFocus( Allowed );
00384     pending_take_activity = NULL;
00385     }
00386 
00394 void Workspace::clientHidden( Client* c )
00395     {
00396     assert( !c->isShown( true ) || !c->isOnCurrentDesktop());
00397     activateNextClient( c );
00398     }
00399 
00400 // deactivates 'c' and activates next client
00401 bool Workspace::activateNextClient( Client* c )
00402     {
00403     // if 'c' is not the active or the to-become active one, do nothing
00404     if( !( c == active_client
00405             || ( should_get_focus.count() > 0 && c == should_get_focus.last())))
00406         return false;
00407     closeActivePopup();
00408     if( c != NULL )
00409         {
00410         if( c == active_client )
00411             setActiveClient( NULL, Allowed );
00412         should_get_focus.remove( c );
00413         }
00414     if( focusChangeEnabled())
00415         {
00416         if ( options->focusPolicyIsReasonable())
00417             { // search the focus_chain for a client to transfer focus to
00418               // if 'c' is transient, transfer focus to the first suitable mainwindow
00419             Client* get_focus = NULL;
00420             const ClientList mainwindows = ( c != NULL ? c->mainClients() : ClientList());
00421             for( ClientList::ConstIterator it = focus_chain[currentDesktop()].fromLast();
00422                  it != focus_chain[currentDesktop()].end();
00423                  --it )
00424                 {
00425                 if( !(*it)->isShown( false ) || !(*it)->isOnCurrentDesktop())
00426                     continue;
00427                 if( options->separateScreenFocus )
00428                     {
00429                     if( c != NULL && !(*it)->isOnScreen( c->screen()))
00430                         continue;
00431                     if( c == NULL && !(*it)->isOnScreen( activeScreen()))
00432                         continue;
00433                     }
00434                 if( mainwindows.contains( *it ))
00435                     {
00436                     get_focus = *it;
00437                     break;
00438                     }
00439                 if( get_focus == NULL )
00440                     get_focus = *it;
00441                 }
00442             if( get_focus == NULL )
00443                 get_focus = findDesktop( true, currentDesktop());
00444             if( get_focus != NULL )
00445                 requestFocus( get_focus );
00446             else
00447                 focusToNull();
00448             }
00449             else
00450                 return false;
00451         }
00452     else
00453         // if blocking focus, move focus to the desktop later if needed
00454         // in order to avoid flickering
00455         focusToNull();
00456     return true;
00457     }
00458 
00459 void Workspace::setCurrentScreen( int new_screen )
00460     {
00461     if (new_screen < 0 || new_screen > numScreens())
00462         return;
00463     if ( !options->focusPolicyIsReasonable())
00464         return;
00465     closeActivePopup();
00466     Client* get_focus = NULL;
00467     for( ClientList::ConstIterator it = focus_chain[currentDesktop()].fromLast();
00468          it != focus_chain[currentDesktop()].end();
00469          --it )
00470         {
00471         if( !(*it)->isShown( false ) || !(*it)->isOnCurrentDesktop())
00472             continue;
00473         if( !(*it)->screen() == new_screen )
00474             continue;
00475         get_focus = *it;
00476         break;
00477         }
00478     if( get_focus == NULL )
00479         get_focus = findDesktop( true, currentDesktop());
00480     if( get_focus != NULL && get_focus != mostRecentlyActivatedClient())
00481         requestFocus( get_focus );
00482     active_screen = new_screen;
00483     }
00484 
00485 void Workspace::gotFocusIn( const Client* c )
00486     {
00487     if( should_get_focus.contains( const_cast< Client* >( c )))
00488         { // remove also all sooner elements that should have got FocusIn,
00489       // but didn't for some reason (and also won't anymore, because they were sooner)
00490         while( should_get_focus.first() != c )
00491             should_get_focus.pop_front();
00492         should_get_focus.pop_front(); // remove 'c'
00493         }
00494     }
00495 
00496 void Workspace::setShouldGetFocus( Client* c )
00497     {
00498     should_get_focus.append( c );
00499     updateStackingOrder(); // e.g. fullscreens have different layer when active/not-active
00500     }
00501 
00502 // focus_in -> the window got FocusIn event
00503 // session_active -> the window was active when saving session
00504 bool Workspace::allowClientActivation( const Client* c, Time time, bool focus_in )
00505     {
00506     // options->focusStealingPreventionLevel :
00507     // 0 - none    - old KWin behaviour, new windows always get focus
00508     // 1 - low     - focus stealing prevention is applied normally, when unsure, activation is allowed
00509     // 2 - normal  - focus stealing prevention is applied normally, when unsure, activation is not allowed,
00510     //              this is the default
00511     // 3 - high    - new window gets focus only if it belongs to the active application,
00512     //              or when no window is currently active
00513     // 4 - extreme - no window gets focus without user intervention
00514     if( time == -1U )
00515         time = c->userTime();
00516     int level = c->rules()->checkFSP( options->focusStealingPreventionLevel );
00517     if( session_saving && level <= 2 ) // <= normal
00518         {
00519         return true;
00520         }
00521     Client* ac = mostRecentlyActivatedClient();
00522     if( focus_in )
00523         {
00524         if( should_get_focus.contains( const_cast< Client* >( c )))
00525             return true; // FocusIn was result of KWin's action
00526         // Before getting FocusIn, the active Client already
00527         // got FocusOut, and therefore got deactivated.
00528         ac = last_active_client;
00529         }
00530     if( time == 0 ) // explicitly asked not to get focus
00531         return false;
00532     if( level == 0 ) // none
00533         return true;
00534     if( level == 4 ) // extreme
00535         return false;
00536     if( !c->isOnCurrentDesktop())
00537         return false; // allow only with level == 0
00538     if( c->ignoreFocusStealing())
00539         return true;
00540     if( ac == NULL || ac->isDesktop())
00541         {
00542 //        kdDebug( 1212 ) << "Activation: No client active, allowing" << endl;
00543         return true; // no active client -> always allow
00544         }
00545     // TODO window urgency  -> return true?
00546     if( Client::belongToSameApplication( c, ac, true ))
00547         {
00548 //        kdDebug( 1212 ) << "Activation: Belongs to active application" << endl;
00549         return true;
00550         }
00551     if( level == 3 ) // high
00552         return false;
00553     if( time == -1U )  // no time known
00554         {
00555 //        kdDebug( 1212 ) << "Activation: No timestamp at all" << endl;
00556         if( level == 1 ) // low
00557             return true;
00558         // no timestamp at all, don't activate - because there's also creation timestamp
00559         // done on CreateNotify, this case should happen only in case application
00560         // maps again already used window, i.e. this won't happen after app startup
00561         return false; 
00562         }
00563     // level == 2 // normal
00564     Time user_time = ac->userTime();
00565 //    kdDebug( 1212 ) << "Activation, compared:" << c << ":" << time << ":" << user_time
00566 //        << ":" << ( timestampCompare( time, user_time ) >= 0 ) << endl;
00567     return timestampCompare( time, user_time ) >= 0; // time >= user_time
00568     }
00569 
00570 // basically the same like allowClientActivation(), this time allowing
00571 // a window to be fully raised upon its own request (XRaiseWindow),
00572 // if refused, it will be raised only on top of windows belonging
00573 // to the same application
00574 bool Workspace::allowFullClientRaising( const Client* c, Time time )
00575     {
00576     int level = c->rules()->checkFSP( options->focusStealingPreventionLevel );
00577     if( session_saving && level <= 2 ) // <= normal
00578         {
00579         return true;
00580         }
00581     Client* ac = mostRecentlyActivatedClient();
00582     if( level == 0 ) // none
00583         return true;
00584     if( level == 4 ) // extreme
00585         return false;
00586     if( ac == NULL || ac->isDesktop())
00587         {
00588 //        kdDebug( 1212 ) << "Raising: No client active, allowing" << endl;
00589         return true; // no active client -> always allow
00590         }
00591     if( c->ignoreFocusStealing())
00592         return true;
00593     // TODO window urgency  -> return true?
00594     if( Client::belongToSameApplication( c, ac, true ))
00595         {
00596 //        kdDebug( 1212 ) << "Raising: Belongs to active application" << endl;
00597         return true;
00598         }
00599     if( level == 3 ) // high
00600         return false;
00601     Time user_time = ac->userTime();
00602 //    kdDebug( 1212 ) << "Raising, compared:" << time << ":" << user_time
00603 //        << ":" << ( timestampCompare( time, user_time ) >= 0 ) << endl;
00604     return timestampCompare( time, user_time ) >= 0; // time >= user_time
00605     }
00606 
00607 // called from Client after FocusIn that wasn't initiated by KWin and the client
00608 // wasn't allowed to activate
00609 void Workspace::restoreFocus()
00610     {
00611     // this updateXTime() is necessary - as FocusIn events don't have
00612     // a timestamp *sigh*, kwin's timestamp would be older than the timestamp
00613     // that was used by whoever caused the focus change, and therefore
00614     // the attempt to restore the focus would fail due to old timestamp
00615     updateXTime();
00616     if( should_get_focus.count() > 0 )
00617         requestFocus( should_get_focus.last());
00618     else if( last_active_client )
00619         requestFocus( last_active_client );
00620     }
00621 
00622 void Workspace::clientAttentionChanged( Client* c, bool set )
00623     {
00624     if( set )
00625         {
00626         attention_chain.remove( c );
00627         attention_chain.prepend( c );
00628         }
00629     else
00630         attention_chain.remove( c );
00631     }
00632 
00633 // This is used when a client should be shown active immediately after requestFocus(),
00634 // without waiting for the matching FocusIn that will really make the window the active one.
00635 // Used only in special cases, e.g. for MouseActivateRaiseandMove with transparent windows,
00636 bool Workspace::fakeRequestedActivity( Client* c )
00637     {
00638     if( should_get_focus.count() > 0 && should_get_focus.last() == c )
00639         {
00640         if( c->isActive())
00641             return false;
00642         c->setActive( true );
00643         return true;
00644         }
00645     return false;
00646     }
00647 
00648 void Workspace::unfakeActivity( Client* c )
00649     {
00650     if( should_get_focus.count() > 0 && should_get_focus.last() == c )
00651         { // TODO this will cause flicker, and probably is not needed
00652         if( last_active_client != NULL )
00653             last_active_client->setActive( true );
00654         else
00655             c->setActive( false );
00656         }
00657     }
00658 
00659 
00660 //********************************************
00661 // Client
00662 //********************************************
00663 
00670 void Client::updateUserTime( Time time )
00671     { // copied in Group::updateUserTime
00672     if( time == CurrentTime )
00673         time = GET_QT_X_TIME();
00674     if( time != -1U
00675         && ( user_time == CurrentTime
00676             || timestampCompare( time, user_time ) > 0 )) // time > user_time
00677         user_time = time;
00678     group()->updateUserTime( user_time );
00679     }
00680 
00681 Time Client::readUserCreationTime() const
00682     {
00683     long result = -1; // Time == -1 means none
00684     Atom type;
00685     int format, status;
00686     unsigned long nitems = 0;
00687     unsigned long extra = 0;
00688     unsigned char *data = 0;
00689     KXErrorHandler handler; // ignore errors?
00690     status = XGetWindowProperty( qt_xdisplay(), window(),
00691         atoms->kde_net_wm_user_creation_time, 0, 10000, FALSE, XA_CARDINAL,
00692         &type, &format, &nitems, &extra, &data );
00693     if (status  == Success )
00694         {
00695         if (data && nitems > 0)
00696             result = *((long*) data);
00697         XFree(data);
00698         }
00699     return result;       
00700     }
00701 
00702 void Client::demandAttention( bool set )
00703     {
00704     if( isActive())
00705         set = false;
00706     if( demands_attention == set )
00707         return;
00708     demands_attention = set;
00709     if( demands_attention )
00710         {
00711         // Demand attention flag is often set right from manage(), when focus stealing prevention
00712         // steps in. At that time the window has no taskbar entry yet, so KNotify cannot place
00713         // e.g. the passive popup next to it. So wait up to 1 second for the icon geometry
00714         // to be set.
00715         // Delayed call to KNotify also solves the problem of having X server grab in manage(),
00716         // which may deadlock when KNotify (or KLauncher when launching KNotify) need to access X.
00717         Notify::Event e = isOnCurrentDesktop() ? Notify::DemandAttentionCurrent : Notify::DemandAttentionOther;
00718         // Setting the demands attention state needs to be done directly in KWin, because
00719         // KNotify would try to set it, resulting in a call to KNotify again, etc.
00720         if( Notify::makeDemandAttention( e ))
00721             info->setState( set ? NET::DemandsAttention : 0, NET::DemandsAttention );
00722 
00723         if( demandAttentionKNotifyTimer == NULL )
00724             {
00725             demandAttentionKNotifyTimer = new TQTimer( this );
00726             connect( demandAttentionKNotifyTimer, TQT_SIGNAL( timeout()), TQT_SLOT( demandAttentionKNotify()));
00727             }
00728         demandAttentionKNotifyTimer->start( 1000, true );
00729         }
00730     else
00731         info->setState( set ? NET::DemandsAttention : 0, NET::DemandsAttention );
00732     workspace()->clientAttentionChanged( this, set );
00733     }
00734 
00735 void Client::demandAttentionKNotify()
00736     {
00737     Notify::Event e = isOnCurrentDesktop() ? Notify::DemandAttentionCurrent : Notify::DemandAttentionOther;
00738     Notify::raise( e, i18n( "Window '%1' demands attention." ).arg( KStringHandler::csqueeze(caption())), this );
00739     demandAttentionKNotifyTimer->stop();
00740     demandAttentionKNotifyTimer->deleteLater();
00741     demandAttentionKNotifyTimer = NULL;
00742     }
00743 
00744 // TODO I probably shouldn't be lazy here and do it without the macro, so that people can read it
00745 KWIN_COMPARE_PREDICATE( SameApplicationActiveHackPredicate, const Client*,
00746     // ignore already existing splashes, toolbars, utilities, menus and topmenus,
00747     // as the app may show those before the main window
00748     !cl->isSplash() && !cl->isToolbar() && !cl->isTopMenu() && !cl->isUtility() && !cl->isMenu()
00749     && Client::belongToSameApplication( cl, value, true ) && cl != value);
00750 
00751 Time Client::readUserTimeMapTimestamp( const KStartupInfoId* asn_id, const KStartupInfoData* asn_data,
00752     bool session ) const
00753     {
00754     Time time = info->userTime();
00755 //    kdDebug( 1212 ) << "User timestamp, initial:" << time << endl;
00756     // newer ASN timestamp always replaces user timestamp, unless user timestamp is 0
00757     // helps e.g. with konqy reusing
00758     if( asn_data != NULL && time != 0 )
00759         {
00760         // prefer timestamp from ASN id (timestamp from data is obsolete way)
00761         if( asn_id->timestamp() != 0
00762             && ( time == -1U || timestampCompare( asn_id->timestamp(), time ) > 0 ))
00763             {
00764             time = asn_id->timestamp();
00765             }
00766         else if( asn_data->timestamp() != -1U
00767             && ( time == -1U || timestampCompare( asn_data->timestamp(), time ) > 0 ))
00768             {
00769             time = asn_data->timestamp();
00770             }
00771         }
00772 //    kdDebug( 1212 ) << "User timestamp, ASN:" << time << endl;
00773     if( time == -1U )
00774         { // The window doesn't have any timestamp.
00775       // If it's the first window for its application
00776       // (i.e. there's no other window from the same app),
00777       // use the _KDE_NET_WM_USER_CREATION_TIME trick.
00778       // Otherwise, refuse activation of a window
00779       // from already running application if this application
00780       // is not the active one (unless focus stealing prevention is turned off).
00781         Client* act = workspace()->mostRecentlyActivatedClient();
00782         if( act != NULL && !belongToSameApplication( act, this, true ))
00783             {
00784             bool first_window = true;
00785             if( isTransient())
00786                 {
00787                 if( act->hasTransient( this, true ))
00788                     ; // is transient for currently active window, even though it's not
00789                       // the same app (e.g. kcookiejar dialog) -> allow activation
00790                 else if( groupTransient() &&
00791                     findClientInList( mainClients(), SameApplicationActiveHackPredicate( this )) == NULL )
00792                     ; // standalone transient
00793                 else
00794                     first_window = false;
00795                 }
00796             else
00797                 {
00798                 if( workspace()->findClient( SameApplicationActiveHackPredicate( this )))
00799                     first_window = false;
00800                 }
00801             // don't refuse if focus stealing prevention is turned off
00802             if( !first_window && rules()->checkFSP( options->focusStealingPreventionLevel ) > 0 )
00803                 {
00804 //                kdDebug( 1212 ) << "User timestamp, already exists:" << 0 << endl;
00805                 return 0; // refuse activation
00806                 }
00807             }
00808         // Creation time would just mess things up during session startup,
00809         // as possibly many apps are started up at the same time.
00810         // If there's no active window yet, no timestamp will be needed,
00811         // as plain Workspace::allowClientActivation() will return true
00812         // in such case. And if there's already active window,
00813         // it's better not to activate the new one.
00814         // Unless it was the active window at the time
00815         // of session saving and there was no user interaction yet,
00816         // this check will be done in manage().
00817         if( session )
00818             return -1U;
00819         if( ignoreFocusStealing() && act != NULL )
00820             time = act->userTime();
00821         else
00822             time = readUserCreationTime();
00823         }
00824 //    kdDebug( 1212 ) << "User timestamp, final:" << this << ":" << time << endl;
00825     return time;
00826     }
00827 
00828 Time Client::userTime() const
00829     {
00830     Time time = user_time;
00831     if( time == 0 ) // doesn't want focus after showing
00832         return 0;
00833     assert( group() != NULL );
00834     if( time == -1U
00835          || ( group()->userTime() != -1U
00836                  && timestampCompare( group()->userTime(), time ) > 0 ))
00837         time = group()->userTime();
00838     return time;
00839     }
00840 
00852 void Client::setActive( bool act, bool updateOpacity_)
00853     {
00854     if ( active == act )
00855         return;
00856     active = act;
00857     workspace()->setActiveClient( act ? this : NULL, Allowed );
00858     
00859     if (updateOpacity_) updateOpacity();
00860     if (isModal() && transientFor())
00861     {
00862         if (!act) transientFor()->updateOpacity();
00863         else if (!transientFor()->custom_opacity) transientFor()->setOpacity(options->translucentActiveWindows, options->activeWindowOpacity);
00864     }
00865     updateShadowSize();
00866     
00867     if ( active )
00868     {
00869         Notify::raise( Notify::Activate );
00870         if (options->shadowEnabled(true))
00871             {
00872             if (options->shadowEnabled(false))
00873                 {
00874                 // Wait for inactive shadow to expose occluded windows and give
00875                 // them a chance to redraw before painting the active shadow
00876                 removeShadow();
00877                 drawDelayedShadow();
00878                 if (!isDesktop() &&
00879                        this != workspace()->topClientOnDesktop(desktop()))
00880                     // If the newly activated window's isn't the desktop, wait
00881                     // for its shadow to draw, then redraw any shadows
00882                     // overlapping it.
00883                     drawOverlappingShadows(true);
00884                 }
00885             else
00886                 drawShadow();
00887             }
00888         }
00889     else
00890         {
00891         removeShadow();
00892 
00893         if (options->shadowEnabled(false))
00894             if (this == workspace()->topClientOnDesktop(desktop()))
00895                 {
00896                 /* If the newly deactivated window is the top client on the
00897                  * desktop, then the newly activated window is below it; ensure
00898                  * that the deactivated window's shadow draws after the
00899                  * activated window's shadow.
00900                  */
00901                 if ((shadowAfterClient = workspace()->activeClient()))
00902                     drawShadowAfter(shadowAfterClient);
00903                 }
00904             else
00905                 drawDelayedShadow();
00906         }
00907 
00908     if( !active )
00909         cancelAutoRaise();
00910 
00911     if( !active && shade_mode == ShadeActivated )
00912         setShade( ShadeNormal );
00913         
00914     StackingUpdatesBlocker blocker( workspace());
00915     workspace()->updateClientLayer( this ); // active windows may get different layer
00916     // TODO optimize? mainClients() may be a bit expensive
00917     ClientList mainclients = mainClients();
00918     for( ClientList::ConstIterator it = mainclients.begin();
00919          it != mainclients.end();
00920          ++it )
00921         if( (*it)->isFullScreen()) // fullscreens go high even if their transient is active
00922             workspace()->updateClientLayer( *it );
00923     if( decoration != NULL )
00924         decoration->activeChange();
00925     updateMouseGrab();
00926     updateUrgency(); // demand attention again if it's still urgent
00927     }
00928 
00929 void Client::startupIdChanged()
00930     {
00931     KStartupInfoId asn_id;
00932     KStartupInfoData asn_data;
00933     bool asn_valid = workspace()->checkStartupNotification( window(), asn_id, asn_data );
00934     if( !asn_valid )
00935         return;
00936     // If the ASN contains desktop, move it to the desktop, otherwise move it to the current
00937     // desktop (since the new ASN should make the window act like if it's a new application
00938     // launched). However don't affect the window's desktop if it's set to be on all desktops.
00939     int desktop = workspace()->currentDesktop();
00940     if( asn_data.desktop() != 0 )
00941         desktop = asn_data.desktop();
00942     if( !isOnAllDesktops())
00943         workspace()->sendClientToDesktop( this, desktop, true );
00944     if( asn_data.xinerama() != -1 )
00945         workspace()->sendClientToScreen( this, asn_data.xinerama());
00946     Time timestamp = asn_id.timestamp();
00947     if( timestamp == 0 && asn_data.timestamp() != -1U )
00948         timestamp = asn_data.timestamp();
00949     if( timestamp != 0 )
00950         {
00951         bool activate = workspace()->allowClientActivation( this, timestamp );
00952         if( asn_data.desktop() != 0 && !isOnCurrentDesktop())
00953             activate = false; // it was started on different desktop than current one
00954         if( activate )
00955             workspace()->activateClient( this );
00956         else
00957             demandAttention();
00958         }
00959     }
00960 
00961 void Client::updateUrgency()
00962     {
00963     if( urgency )
00964         demandAttention();
00965     }
00966 
00967 void Client::shortcutActivated()
00968     {
00969     workspace()->activateClient( this, true ); // force
00970     }
00971 
00972 //****************************************
00973 // Group
00974 //****************************************
00975     
00976 void Group::startupIdChanged()
00977     {
00978     KStartupInfoId asn_id;
00979     KStartupInfoData asn_data;
00980     bool asn_valid = workspace()->checkStartupNotification( leader_wid, asn_id, asn_data );
00981     if( !asn_valid )
00982         return;
00983     if( asn_id.timestamp() != 0 && user_time != -1U
00984         && timestampCompare( asn_id.timestamp(), user_time ) > 0 )
00985         {
00986         user_time = asn_id.timestamp();
00987         }
00988     else if( asn_data.timestamp() != -1U && user_time != -1U
00989         && timestampCompare( asn_data.timestamp(), user_time ) > 0 )
00990         {
00991         user_time = asn_data.timestamp();
00992         }
00993     }
00994 
00995 void Group::updateUserTime( Time time )
00996     { // copy of Client::updateUserTime
00997     if( time == CurrentTime )
00998         time = GET_QT_X_TIME();
00999     if( time != -1U
01000         && ( user_time == CurrentTime
01001             || timestampCompare( time, user_time ) > 0 )) // time > user_time
01002         user_time = time;
01003     }
01004 
01005 } // namespace

kwin

Skip menu "kwin"
  • Main Page
  • Alphabetical List
  • Class List
  • File List
  • Class Members

kwin

Skip menu "kwin"
  • kate
  • kwin
  •   lib
  • libkonq
Generated for kwin by doxygen 1.7.6.1
This website is maintained by Timothy Pearson.
KDE® and the K Desktop Environment® logo are registered trademarks of KDE e.V. |