718 lines
23 KiB
C++
718 lines
23 KiB
C++
/*****************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
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Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org>
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You can Freely distribute this program under the GNU General Public
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License. See the file "COPYING" for the exact licensing terms.
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******************************************************************/
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// SELI zmenit doc
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/*
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This file contains things relevant to stacking order and layers.
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Design:
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Normal unconstrained stacking order, as requested by the user (by clicking
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on windows to raise them, etc.), is in Workspace::unconstrained_stacking_order.
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That list shouldn't be used at all, except for building
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Workspace::stacking_order. The building is done
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in Workspace::constrainedStackingOrder(). Only Workspace::stackingOrder() should
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be used to get the stacking order, because it also checks the stacking order
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is up to date.
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All clients are also stored in Workspace::clients (except for isDesktop() clients,
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as those are very special, and are stored in Workspace::desktops), in the order
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the clients were created.
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Every window has one layer assigned in which it is. There are 6 layers,
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from bottom : DesktopLayer, BelowLayer, NormalLayer, DockLayer, AboveLayer
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and ActiveLayer (see also NETWM sect.7.10.). The layer a window is in depends
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on the window type, and on other things like whether the window is active.
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NET::Splash clients belong to the Normal layer. NET::TopMenu clients
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belong to Dock layer. Clients that are both NET::Dock and NET::KeepBelow
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are in the Normal layer in order to keep the 'allow window to cover
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the panel' Kicker setting to work as intended (this may look like a slight
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spec violation, but a) I have no better idea, b) the spec allows adjusting
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the stacking order if the WM thinks it's a good idea . We put all
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NET::KeepAbove above all Docks too, even though the spec suggests putting
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them in the same layer.
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Most transients are in the same layer as their mainwindow,
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see Workspace::constrainedStackingOrder(), they may also be in higher layers, but
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they should never be below their mainwindow.
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When some client attribute changes (above/below flag, transiency...),
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Workspace::updateClientLayer() should be called in order to make
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sure it's moved to the appropriate layer ClientList if needed.
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Currently the things that affect client in which layer a client
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belongs: KeepAbove/Keep Below flags, window type, fullscreen
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state and whether the client is active, mainclient (transiency).
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Make sure updateStackingOrder() is called in order to make
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Workspace::stackingOrder() up to date and propagated to the world.
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Using Workspace::blockStackingUpdates() (or the StackingUpdatesBlocker
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helper class) it's possible to temporarily disable updates
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and the stacking order will be updated once after it's allowed again.
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*/
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#include <assert.h>
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#include <kdebug.h>
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#include "utils.h"
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#include "client.h"
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#include "workspace.h"
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#include "tabbox.h"
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#include "popupinfo.h"
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#include "group.h"
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#include "rules.h"
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extern Time qt_x_time;
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namespace KWinInternal
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{
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//*******************************
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// Workspace
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//*******************************
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void Workspace::updateClientLayer( Client* c )
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{
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if( c == NULL )
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return;
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if( c->layer() == c->belongsToLayer())
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return;
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StackingUpdatesBlocker blocker( this );
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c->invalidateLayer(); // invalidate, will be updated when doing restacking
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for( ClientList::ConstIterator it = c->transients().begin();
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it != c->transients().end();
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++it )
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updateClientLayer( *it );
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}
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void Workspace::updateStackingOrder( bool propagate_new_clients )
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{
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if( block_stacking_updates > 0 )
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{
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blocked_propagating_new_clients |= propagate_new_clients;
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return;
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}
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ClientList new_stacking_order = constrainedStackingOrder();
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bool changed = ( new_stacking_order != stacking_order );
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stacking_order = new_stacking_order;
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#if 0
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kdDebug() << "stacking:" << changed << endl;
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if( changed || propagate_new_clients )
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{
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for( ClientList::ConstIterator it = stacking_order.begin();
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it != stacking_order.end();
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++it )
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kdDebug() << (void*)(*it) << *it << endl;
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}
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#endif
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if( changed || propagate_new_clients )
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propagateClients( propagate_new_clients );
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}
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/*!
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Propagates the managed clients to the world.
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Called ONLY from updateStackingOrder().
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*/
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void Workspace::propagateClients( bool propagate_new_clients )
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{
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Window *cl; // MW we should not assume WId and Window to be compatible
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// when passig pointers around.
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// restack the windows according to the stacking order
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Window* new_stack = new Window[ stacking_order.count() + 2 ];
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int pos = 0;
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// Stack all windows under the support window. The support window is
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// not used for anything (besides the NETWM property), and it's not shown,
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// but it was lowered after kwin startup. Stacking all clients below
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// it ensures that no client will be ever shown above override-redirect
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// windows (e.g. popups).
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new_stack[ pos++ ] = supportWindow->winId();
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int topmenu_space_pos = 1; // not 0, that's supportWindow !!!
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for( ClientList::ConstIterator it = stacking_order.fromLast();
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it != stacking_order.end();
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--it )
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{
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new_stack[ pos++ ] = (*it)->frameId();
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if( (*it)->isTopMenu())
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topmenu_space_pos = pos;
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}
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if( topmenu_space != NULL )
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{ // make sure the topmenu space is below all topmenus, if there are any
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for( int i = pos;
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i > topmenu_space_pos;
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--i )
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new_stack[ i ] = new_stack[ i - 1 ];
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new_stack[ topmenu_space_pos ] = topmenu_space->winId();
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++pos;
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}
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// TODO isn't it too inefficient to restart always all clients?
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// TODO don't restack not visible windows?
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assert( new_stack[ 0 ] = supportWindow->winId());
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XRestackWindows(qt_xdisplay(), new_stack, pos);
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delete [] new_stack;
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if ( propagate_new_clients )
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{
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cl = new Window[ desktops.count() + clients.count()];
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pos = 0;
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// TODO this is still not completely in the map order
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for ( ClientList::ConstIterator it = desktops.begin(); it != desktops.end(); ++it )
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cl[pos++] = (*it)->window();
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for ( ClientList::ConstIterator it = clients.begin(); it != clients.end(); ++it )
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cl[pos++] = (*it)->window();
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rootInfo->setClientList( cl, pos );
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delete [] cl;
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}
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cl = new Window[ stacking_order.count()];
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pos = 0;
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for ( ClientList::ConstIterator it = stacking_order.begin(); it != stacking_order.end(); ++it)
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cl[pos++] = (*it)->window();
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rootInfo->setClientListStacking( cl, pos );
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delete [] cl;
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#if 0 // not necessary anymore?
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if ( tab_box->isVisible() )
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tab_box->raise();
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if ( popupinfo->isVisible() )
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popupinfo->raise();
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raiseElectricBorders();
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#endif
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}
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/*!
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Returns topmost visible client. Windows on the dock, the desktop
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or of any other special kind are excluded. Also if the window
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doesn't accept focus it's excluded.
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*/
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// TODO misleading name for this method
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Client* Workspace::topClientOnDesktop( int desktop, bool unconstrained ) const
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{
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// TODO Q_ASSERT( block_stacking_updates == 0 );
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ClientList::ConstIterator begin, end;
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if( !unconstrained )
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{
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begin = stacking_order.fromLast();
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end = stacking_order.end();
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}
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else
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{
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begin = unconstrained_stacking_order.fromLast();
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end = unconstrained_stacking_order.end();
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}
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for( ClientList::ConstIterator it = begin;
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it != end;
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--it )
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{
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if ( (*it)->isOnDesktop( desktop ) && !(*it)->isSpecialWindow()
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&& (*it)->isShown( false ) && (*it)->wantsTabFocus())
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return *it;
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}
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return 0;
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}
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Client* Workspace::findDesktop( bool topmost, int desktop ) const
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{
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// TODO Q_ASSERT( block_stacking_updates == 0 );
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if( topmost )
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{
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for ( ClientList::ConstIterator it = stacking_order.fromLast(); it != stacking_order.end(); --it)
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{
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if ( (*it)->isOnDesktop( desktop ) && (*it)->isDesktop()
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&& (*it)->isShown( true ))
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return *it;
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}
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}
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else // bottom-most
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{
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for ( ClientList::ConstIterator it = stacking_order.begin(); it != stacking_order.end(); ++it)
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{
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if ( (*it)->isOnDesktop( desktop ) && (*it)->isDesktop()
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&& (*it)->isShown( true ))
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return *it;
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}
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}
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return NULL;
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}
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void Workspace::raiseOrLowerClient( Client *c)
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{
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if (!c) return;
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Client* topmost = NULL;
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// TODO Q_ASSERT( block_stacking_updates == 0 );
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if ( most_recently_raised && stacking_order.contains( most_recently_raised ) &&
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most_recently_raised->isShown( true ) && c->isOnCurrentDesktop())
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topmost = most_recently_raised;
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else
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topmost = topClientOnDesktop( c->isOnAllDesktops() ? currentDesktop() : c->desktop());
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if( c == topmost)
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lowerClient(c);
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else
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raiseClient(c);
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}
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void Workspace::lowerClient( Client* c )
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{
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if ( !c )
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return;
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if( c->isTopMenu())
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return;
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c->cancelAutoRaise();
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StackingUpdatesBlocker blocker( this );
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unconstrained_stacking_order.remove( c );
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unconstrained_stacking_order.prepend( c );
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if( c->isTransient())
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{
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// lower also mainclients, in their reversed stacking order
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ClientList mainclients = ensureStackingOrder( c->mainClients());
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for( ClientList::ConstIterator it = mainclients.fromLast();
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it != mainclients.end();
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++it )
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lowerClient( *it );
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}
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if ( c == most_recently_raised )
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most_recently_raised = 0;
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}
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void Workspace::lowerClientWithinApplication( Client* c )
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{
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if ( !c )
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return;
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if( c->isTopMenu())
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return;
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c->cancelAutoRaise();
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StackingUpdatesBlocker blocker( this );
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unconstrained_stacking_order.remove( c );
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bool lowered = false;
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// first try to put it below the bottom-most window of the application
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for( ClientList::Iterator it = unconstrained_stacking_order.begin();
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it != unconstrained_stacking_order.end();
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++it )
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if( Client::belongToSameApplication( *it, c ))
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{
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unconstrained_stacking_order.insert( it, c );
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lowered = true;
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break;
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}
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if( !lowered )
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unconstrained_stacking_order.prepend( c );
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// ignore mainwindows
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}
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void Workspace::raiseClient( Client* c )
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{
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if ( !c )
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return;
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if( c->isTopMenu())
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return;
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c->cancelAutoRaise();
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StackingUpdatesBlocker blocker( this );
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if( c->isTransient())
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{
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ClientList mainclients = ensureStackingOrder( c->mainClients());
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for( ClientList::ConstIterator it = mainclients.begin();
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it != mainclients.end();
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++it )
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raiseClient( *it );
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}
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unconstrained_stacking_order.remove( c );
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unconstrained_stacking_order.append( c );
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if( !c->isSpecialWindow())
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{
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most_recently_raised = c;
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pending_take_activity = NULL;
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}
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}
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void Workspace::raiseClientWithinApplication( Client* c )
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{
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if ( !c )
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return;
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if( c->isTopMenu())
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return;
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c->cancelAutoRaise();
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StackingUpdatesBlocker blocker( this );
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// ignore mainwindows
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// first try to put it above the top-most window of the application
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for( ClientList::Iterator it = unconstrained_stacking_order.fromLast();
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it != unconstrained_stacking_order.end();
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--it )
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{
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if( *it == c ) // don't lower it just because it asked to be raised
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return;
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if( Client::belongToSameApplication( *it, c ))
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{
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unconstrained_stacking_order.remove( c );
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++it; // insert after the found one
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unconstrained_stacking_order.insert( it, c );
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return;
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}
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}
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}
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void Workspace::raiseClientRequest( Client* c, NET::RequestSource src, Time timestamp )
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{
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if( src == NET::FromTool || allowFullClientRaising( c, timestamp ))
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raiseClient( c );
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else
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{
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raiseClientWithinApplication( c );
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c->demandAttention();
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}
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}
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void Workspace::lowerClientRequest( Client* c, NET::RequestSource src, Time /*timestamp*/ )
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{
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// If the client has support for all this focus stealing prevention stuff,
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// do only lowering within the application, as that's the more logical
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// variant of lowering when application requests it.
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// No demanding of attention here of course.
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if( src == NET::FromTool || !c->hasUserTimeSupport())
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lowerClient( c );
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else
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lowerClientWithinApplication( c );
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}
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void Workspace::restackClientUnderActive( Client* c )
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{
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if( c->isTopMenu())
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return;
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if( !active_client || active_client == c )
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{
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raiseClient( c );
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return;
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}
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// put in the stacking order below _all_ windows belonging to the active application
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assert( unconstrained_stacking_order.contains( active_client ));
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for( ClientList::Iterator it = unconstrained_stacking_order.begin();
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it != unconstrained_stacking_order.end();
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++it )
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{ // TODO ignore topmenus?
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if( Client::belongToSameApplication( active_client, *it ))
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{
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if( *it != c )
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{
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unconstrained_stacking_order.remove( c );
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unconstrained_stacking_order.insert( it, c );
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}
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break;
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}
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}
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assert( unconstrained_stacking_order.contains( c ));
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if( c->wantsTabFocus() && focus_chain.contains( active_client ))
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{
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// also put in focus_chain after all windows belonging to the active application
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focus_chain.remove( c );
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for( ClientList::Iterator it = focus_chain.fromLast();
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it != focus_chain.end();
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--it )
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{
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if( Client::belongToSameApplication( active_client, *it ))
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{
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focus_chain.insert( it, c );
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break;
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}
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}
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}
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updateStackingOrder();
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}
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void Workspace::circulateDesktopApplications()
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{
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if ( desktops.count() > 1 )
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{
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bool change_active = activeClient()->isDesktop();
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raiseClient( findDesktop( false, currentDesktop()));
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if( change_active ) // if the previously topmost Desktop was active, activate this new one
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activateClient( findDesktop( true, currentDesktop()));
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}
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// if there's no active client, make desktop the active one
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if( desktops.count() > 0 && activeClient() == NULL && should_get_focus.count() == 0 )
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activateClient( findDesktop( true, currentDesktop()));
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}
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/*!
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Returns a stacking order based upon \a list that fulfills certain contained.
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*/
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ClientList Workspace::constrainedStackingOrder()
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{
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ClientList layer[ NumLayers ];
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#if 0
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kdDebug() << "stacking1:" << endl;
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#endif
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// build the order from layers
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for( ClientList::ConstIterator it = unconstrained_stacking_order.begin();
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it != unconstrained_stacking_order.end();
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++it )
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{
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#if 0
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kdDebug() << (void*)(*it) << *it << endl;
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#endif
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layer[ (*it)->layer() ].append( *it );
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}
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ClientList stacking;
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for( Layer lay = FirstLayer;
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lay < NumLayers;
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++lay )
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stacking += layer[ lay ];
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#if 0
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kdDebug() << "stacking2:" << endl;
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for( ClientList::ConstIterator it = stacking.begin();
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it != stacking.end();
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++it )
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kdDebug() << (void*)(*it) << *it << endl;
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#endif
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// now keep transients above their mainwindows
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// TODO this could(?) use some optimization
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for( ClientList::Iterator it = stacking.fromLast();
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it != stacking.end();
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)
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{
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if( !(*it)->isTransient())
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{
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--it;
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continue;
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}
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ClientList::Iterator it2 = stacking.end();
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if( (*it)->groupTransient())
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{
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if( (*it)->group()->members().count() > 0 )
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{ // find topmost client this one is transient for
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for( it2 = stacking.fromLast();
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it2 != stacking.end();
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--it2 )
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{
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if( *it2 == *it )
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{
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it2 = stacking.end(); // don't reorder
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break;
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}
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if( (*it2)->hasTransient( *it, true ) && keepTransientAbove( *it2, *it ))
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break;
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}
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} // else it2 remains pointing at stacking.end()
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}
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else
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{
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for( it2 = stacking.fromLast();
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it2 != stacking.end();
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--it2 )
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{
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if( *it2 == *it )
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{
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it2 = stacking.end(); // don't reorder
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break;
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}
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if( *it2 == (*it)->transientFor() && keepTransientAbove( *it2, *it ))
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|
break;
|
|
}
|
|
}
|
|
// kdDebug() << "STACK:" << (*it) << ":" << ( it2 == stacking.end() ? ((Client*)0) : (*it2)) << endl;
|
|
if( it2 == stacking.end())
|
|
{
|
|
--it;
|
|
continue;
|
|
}
|
|
Client* current = *it;
|
|
ClientList::Iterator remove_it = it;
|
|
--it;
|
|
stacking.remove( remove_it );
|
|
if( !current->transients().isEmpty()) // this one now can be possibly above its transients,
|
|
it = it2; // so go again higher in the stack order and possibly move those transients again
|
|
++it2; // insert after the mainwindow, it's ok if it2 is now stacking.end()
|
|
stacking.insert( it2, current );
|
|
}
|
|
#if 0
|
|
kdDebug() << "stacking3:" << endl;
|
|
for( ClientList::ConstIterator it = stacking.begin();
|
|
it != stacking.end();
|
|
++it )
|
|
kdDebug() << (void*)(*it) << *it << endl;
|
|
kdDebug() << "\n\n" << endl;
|
|
#endif
|
|
return stacking;
|
|
}
|
|
|
|
void Workspace::blockStackingUpdates( bool block )
|
|
{
|
|
if( block )
|
|
{
|
|
if( block_stacking_updates == 0 )
|
|
blocked_propagating_new_clients = false;
|
|
++block_stacking_updates;
|
|
}
|
|
else // !block
|
|
if( --block_stacking_updates == 0 )
|
|
updateStackingOrder( blocked_propagating_new_clients );
|
|
}
|
|
|
|
// Ensure list is in stacking order
|
|
ClientList Workspace::ensureStackingOrder( const ClientList& list ) const
|
|
{
|
|
// TODO Q_ASSERT( block_stacking_updates == 0 );
|
|
if( list.count() < 2 )
|
|
return list;
|
|
// TODO is this worth optimizing?
|
|
ClientList result = list;
|
|
for( ClientList::ConstIterator it = stacking_order.begin();
|
|
it != stacking_order.end();
|
|
++it )
|
|
if( result.remove( *it ) != 0 )
|
|
result.append( *it );
|
|
return result;
|
|
}
|
|
|
|
// check whether a transient should be actually kept above its mainwindow
|
|
// there may be some special cases where this rule shouldn't be enfored
|
|
bool Workspace::keepTransientAbove( const Client* mainwindow, const Client* transient )
|
|
{
|
|
// When topmenu's mainwindow becomes active, topmenu is raised and shown.
|
|
// They also belong to the Dock layer. This makes them to be very high.
|
|
// Therefore don't keep group transients above them, otherwise this would move
|
|
// group transients way too high.
|
|
if( mainwindow->isTopMenu() && transient->groupTransient())
|
|
return false;
|
|
return true;
|
|
// #63223 - don't keep transients above docks, because the dock is kept high,
|
|
// and e.g. dialogs for them would be too high too
|
|
// TODO this doesn't really work - the transient should be raised after clicking
|
|
// on the dock, but docks don't become active after clicking them
|
|
if( mainwindow->isDock() && !mainwindow->keepBelow()
|
|
&& !mainwindow->isActive() && !transient->isActive()) // TODO !w->group()->isActive() ???
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
//*******************************
|
|
// Client
|
|
//*******************************
|
|
|
|
void Client::restackWindow( Window /*above TODO */, int detail, NET::RequestSource src, Time timestamp, bool send_event )
|
|
{
|
|
switch ( detail )
|
|
{
|
|
case Above:
|
|
case TopIf:
|
|
workspace()->raiseClientRequest( this, src, timestamp );
|
|
break;
|
|
case Below:
|
|
case BottomIf:
|
|
workspace()->lowerClientRequest( this, src, timestamp );
|
|
break;
|
|
case Opposite:
|
|
default:
|
|
break;
|
|
}
|
|
if( send_event )
|
|
sendSyntheticConfigureNotify();
|
|
}
|
|
|
|
void Client::setKeepAbove( bool b )
|
|
{
|
|
b = rules()->checkKeepAbove( b );
|
|
if( b )
|
|
setKeepBelow( false );
|
|
if ( b == keepAbove()
|
|
|| ( b && keepBelow())) // forced below
|
|
{ // force hint change if different
|
|
if( bool( info->state() & NET::KeepAbove ) != keepAbove())
|
|
info->setState( keepAbove() ? NET::KeepAbove : 0, NET::KeepAbove );
|
|
return;
|
|
}
|
|
keep_above = b;
|
|
info->setState( keepAbove() ? NET::KeepAbove : 0, NET::KeepAbove );
|
|
// TODO emit a signal about the change to the style plugin
|
|
workspace()->updateClientLayer( this );
|
|
updateWindowRules();
|
|
}
|
|
|
|
void Client::setKeepBelow( bool b )
|
|
{
|
|
b = rules()->checkKeepBelow( b );
|
|
if( b )
|
|
setKeepAbove( false );
|
|
if ( b == keepBelow()
|
|
|| ( b && keepAbove())) // forced above
|
|
{ // force hint change if different
|
|
if( bool( info->state() & NET::KeepBelow ) != keepBelow())
|
|
info->setState( keepBelow() ? NET::KeepBelow : 0, NET::KeepBelow );
|
|
return;
|
|
}
|
|
keep_below = b;
|
|
info->setState( keepBelow() ? NET::KeepBelow : 0, NET::KeepBelow );
|
|
workspace()->updateClientLayer( this );
|
|
updateWindowRules();
|
|
}
|
|
|
|
Layer Client::layer() const
|
|
{
|
|
if( in_layer == UnknownLayer )
|
|
const_cast< Client* >( this )->in_layer = belongsToLayer();
|
|
return in_layer;
|
|
}
|
|
|
|
Layer Client::belongsToLayer() const
|
|
{
|
|
if( isDesktop())
|
|
return DesktopLayer;
|
|
if( isSplash()) // no damn annoying splashscreens
|
|
return NormalLayer; // getting in the way of everything else
|
|
if( isDock() && keepBelow())
|
|
// slight hack for the 'allow window to cover panel' Kicker setting
|
|
// don't move keepbelow docks below normal window, but only to the same
|
|
// layer, so that both may be raised to cover the other
|
|
return NormalLayer;
|
|
if( keepBelow())
|
|
return BelowLayer;
|
|
if( isDock() && !keepBelow())
|
|
return DockLayer;
|
|
if( isTopMenu())
|
|
return DockLayer;
|
|
// only raise fullscreen above docks if it's the topmost window in unconstrained stacking order,
|
|
// i.e. the window set to be topmost by the user
|
|
bool raise_special_active_windows = ( workspace()->topClientOnDesktop( desktop(), true ) == this );
|
|
if( keepAbove())
|
|
return AboveLayer;
|
|
if( isFullScreen() && workspace()->activeClient() != NULL
|
|
&& ( workspace()->activeClient() == this || this->hasTransient( workspace()->activeClient(), true ))
|
|
&& raise_special_active_windows )
|
|
return ActiveLayer;
|
|
return NormalLayer;
|
|
}
|
|
|
|
} // namespace
|