kwin/workspace.h

/*****************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org>

You can Freely distribute this program under the GNU General Public
License. See the file "COPYING" for the exact licensing terms.
******************************************************************/

#ifndef KWIN_WORKSPACE_H
#define KWIN_WORKSPACE_H

#include <qtimer.h>
#include <kshortcut.h>
#include <qcursor.h>
#include <netwm.h>

#include "KWinInterface.h"
#include "utils.h"
#include "kdecoration.h"
#include "sm.h"

#include <X11/Xlib.h>

class QPopupMenu;
class KConfig;
class KGlobalAccel;
class KStartupInfo;
class KStartupInfoId;
class KStartupInfoData;

namespace KWinInternal
{

class Client;
class TabBox;
class PopupInfo;
class RootInfo;
class PluginMgr;
class Placement;
class WindowRules;

class SystemTrayWindow
    {
    public:
        SystemTrayWindow()
            : win(0),winFor(0)
            {}
        SystemTrayWindow( WId w )
            : win(w),winFor(0)
            {}
        SystemTrayWindow( WId w, WId wf  )
            : win(w),winFor(wf)
            {}

        bool operator==( const SystemTrayWindow& other )
            { return win == other.win; }
        WId win;
        WId winFor;
    };

typedef QValueList<SystemTrayWindow> SystemTrayWindowList;

class Workspace : public QObject, public KWinInterface, public KDecorationDefines
    {
    Q_OBJECT
    public:
        Workspace( bool restore = FALSE );
        virtual ~Workspace();

        static Workspace * self() { return _self; }

        bool workspaceEvent( XEvent * );

        KDecoration* createDecoration( KDecorationBridge* bridge );

        bool hasClient( const Client * );

        template< typename T > Client* findClient( T predicate );
        template< typename T1, typename T2 > void forEachClient( T1 procedure, T2 predicate );
        template< typename T > void forEachClient( T procedure );

        QRect clientArea( clientAreaOption, const QPoint& p, int desktop ) const;
        QRect clientArea( clientAreaOption, const Client* c ) const;

        /**
         * @internal
         */
        void killWindowId( Window window);

        void killWindow() { slotKillWindow(); }

        WId rootWin() const;

        bool initializing() const;

        /**
         * Returns the active client, i.e. the client that has the focus (or None
         * if no client has the focus)
         */
        Client* activeClient() const;
        // Client that was activated, but it's not yet really activeClient(), because
        // we didn't process yet the matching FocusIn event. Used mostly in focus
        // stealing prevention code.
        Client* mostRecentlyActivatedClient() const;

        void activateClient( Client*, bool force = FALSE  );
        void requestFocus( Client* c, bool force = FALSE );
        void takeActivity( Client* c, int flags, bool handled ); // flags are ActivityFlags
        void handleTakeActivity( Client* c, Time timestamp, int flags ); // flags are ActivityFlags
        bool allowClientActivation( const Client* c, Time time = -1U, bool focus_in = false,
            bool session_active = false );
        void restoreFocus();
        void gotFocusIn( const Client* );
        void setShouldGetFocus( Client* );
        bool fakeRequestedActivity( Client* c );
        void unfakeActivity( Client* c );
        void activateNextClient( Client* c );
        bool focusChangeEnabled() { return block_focus == 0; }

        void updateColormap();

        /**
         * Indicates that the client c is being moved around by the user.
         */
        void setClientIsMoving( Client *c );

        void place( Client *c, QRect& area );
        void placeSmart( Client* c, const QRect& area );

        QPoint adjustClientPosition( Client* c, QPoint pos );
        void raiseClient( Client* c );
        void lowerClient( Client* c );
        void raiseClientRequest( Client* c, NET::RequestSource src, Time timestamp );
        void lowerClientRequest( Client* c, NET::RequestSource src, Time timestamp );
        void restackClientUnderActive( Client* );
        void updateClientLayer( Client* c );
        void raiseOrLowerClient( Client * );
        void reconfigure();

        void clientHidden( Client*  );
        void clientAttentionChanged( Client* c, bool set );

        void clientMoved(const QPoint &pos, Time time);

        /**
         * Returns the current virtual desktop of this workspace
         */
        int currentDesktop() const;
        /**
         * Returns the number of virtual desktops of this workspace
         */
        int numberOfDesktops() const;
        void setNumberOfDesktops( int n );

        QWidget* desktopWidget();

    // for TabBox
        Client* nextFocusChainClient(Client*) const;
        Client* previousFocusChainClient(Client*) const;
        Client* nextStaticClient(Client*) const;
        Client* previousStaticClient(Client*) const;
        int nextDesktopFocusChain( int iDesktop ) const;
        int previousDesktopFocusChain( int iDesktop ) const;
        void closeTabBox();

         /**
         * Returns the list of clients sorted in stacking order, with topmost client
         * at the last position
         */
        const ClientList& stackingOrder() const;

        ClientList ensureStackingOrder( const ClientList& clients ) const;

        Client* topClientOnDesktop( int desktop, bool unconstrained = false ) const;
        Client* findDesktop( bool topmost, int desktop ) const;
        void sendClientToDesktop( Client* c, int desktop, bool dont_activate );

    // KDE4 remove me - and it's also in the DCOP interface :(
        void showWindowMenuAt( unsigned long id, int x, int y );

        /**
         * Shows the menu operations menu for the client
         * and makes it active if it's not already.
         */
        void showWindowMenu( int x, int y, Client* cl );
        void showWindowMenu( QPoint pos, Client* cl );

        void updateMinimizedOfTransients( Client* );
        void updateOnAllDesktopsOfTransients( Client* );
        void checkTransients( Window w );

        void performWindowOperation( Client* c, WindowOperation op );

        void storeSession( KConfig* config, SMSavePhase phase );

        SessionInfo* takeSessionInfo( Client* );
        WindowRules* findWindowRules( const Client* ) const;

    // dcop interface
        void cascadeDesktop();
        void unclutterDesktop();
        void doNotManage(QString);
        bool setCurrentDesktop( int new_desktop );
        void nextDesktop();
        void previousDesktop();
        void circulateDesktopApplications();

        QString desktopName( int desk ) const;
        void setDesktopLayout(int o, int x, int y);

        bool isNotManaged( const QString& title );  // ### setter or getter ?

        void sendPingToWindow( Window w, Time timestamp ); // called from Client::pingWindow()
        void sendTakeActivity( Client* c, Time timestamp, long flags ); // called from Client::takeActivity()

    // only called from Client::destroyClient() or Client::releaseWindow()
        void removeClient( Client*, allowed_t );
        void setActiveClient( Client*, allowed_t );
        Group* findGroup( Window leader ) const;
        void addGroup( Group* group, allowed_t );
        void removeGroup( Group* group, allowed_t );
        Group* findClientLeaderGroup( const Client* c ) const;

        bool checkStartupNotification( Window w, KStartupInfoId& id, KStartupInfoData& data );

        void focusToNull(); // SELI public?
        
        bool forcedGlobalMouseGrab() const;

        void sessionSaveStarted();
        void sessionSaveDone();
        void setWasUserInteraction();
        bool sessionSaving() const;

        bool managingTopMenus() const;
        int topMenuHeight() const;

        int packPositionLeft( const Client* cl, int oldx, bool left_edge ) const;
        int packPositionRight( const Client* cl, int oldx, bool right_edge ) const;
        int packPositionUp( const Client* cl, int oldy, bool top_edge ) const;
        int packPositionDown( const Client* cl, int oldy, bool bottom_edge ) const;

        static QStringList configModules(bool controlCenter);

        void cancelDelayFocus();
        void requestDelayFocus( Client* );

    public slots:
        void refresh();
    // keybindings
        void slotSwitchDesktopNext();
        void slotSwitchDesktopPrevious();
        void slotSwitchDesktopRight();
        void slotSwitchDesktopLeft();
        void slotSwitchDesktopUp();
        void slotSwitchDesktopDown();

        void slotSwitchToDesktop( int );
    //void slotSwitchToWindow( int );
        void slotWindowToDesktop( int );
    //void slotWindowToListPosition( int );

        void slotWindowMaximize();
        void slotWindowMaximizeVertical();
        void slotWindowMaximizeHorizontal();
        void slotWindowMinimize();
        void slotWindowShade();
        void slotWindowRaise();
        void slotWindowLower();
        void slotWindowRaiseOrLower();
        void slotActivateAttentionWindow();
        void slotWindowPackLeft();
        void slotWindowPackRight();
        void slotWindowPackUp();
        void slotWindowPackDown();
        void slotWindowGrowHorizontal();
        void slotWindowGrowVertical();
        void slotWindowShrinkHorizontal();
        void slotWindowShrinkVertical();

        void slotWalkThroughDesktops();
        void slotWalkBackThroughDesktops();
        void slotWalkThroughDesktopList();
        void slotWalkBackThroughDesktopList();
        void slotWalkThroughWindows();
        void slotWalkBackThroughWindows();

        void slotWindowOperations();
        void slotWindowClose();
        void slotWindowMove();
        void slotWindowResize();
        void slotWindowAbove();
        void slotWindowBelow();
        void slotWindowOnAllDesktops();
        void slotWindowFullScreen();
        void slotWindowNoBorder();

        void slotWindowToNextDesktop();
        void slotWindowToPreviousDesktop();

        void slotMouseEmulation();

        void slotSettingsChanged( int category );

        void slotReconfigure();

        void slotKillWindow();

        void slotGrabWindow();
        void slotGrabDesktop();

        void updateClientArea();

    private slots:
        void desktopPopupAboutToShow();
        void clientPopupAboutToShow();
        void slotSendToDesktop( int );
        void clientPopupActivated( int );
        void configureWM();
        void desktopResized();
        void slotUpdateToolWindows();
        void lostTopMenuSelection();
        void lostTopMenuOwner();
        void delayFocus();

    protected:
        bool keyPressMouseEmulation( XKeyEvent& ev );
        bool netCheck( XEvent* e );

    private:
        void init();
        void initShortcuts();
        void readShortcuts();
        void initDesktopPopup();

        bool startKDEWalkThroughWindows();
        bool startWalkThroughDesktops( int mode ); // TabBox::Mode::DesktopMode | DesktopListMode
        bool startWalkThroughDesktops();
        bool startWalkThroughDesktopList();
        void KDEWalkThroughWindows( bool forward );
        void CDEWalkThroughWindows( bool forward );
        void walkThroughDesktops( bool forward );
        void KDEOneStepThroughWindows( bool forward );
        void oneStepThroughDesktops( bool forward, int mode ); // TabBox::Mode::DesktopMode | DesktopListMode
        void oneStepThroughDesktops( bool forward );
        void oneStepThroughDesktopList( bool forward );
        bool establishTabBoxGrab();
        void removeTabBoxGrab();

        void updateStackingOrder( bool propagate_new_clients = false );
        void propagateClients( bool propagate_new_clients ); // called only from updateStackingOrder
        ClientList constrainedStackingOrder();
        void raiseClientWithinApplication( Client* c );
        void lowerClientWithinApplication( Client* c );
        bool allowFullClientRaising( const Client* c, Time timestamp );
        bool keepTransientAbove( const Client* mainwindow, const Client* transient );
        void blockStackingUpdates( bool block );
        void updateCurrentTopMenu();
        void addTopMenu( Client* c );
        void removeTopMenu( Client* c );
        void setupTopMenuHandling();
        void updateTopMenuGeometry( Client* c = NULL );
        void updateToolWindows( bool also_hide );

    // this is the right way to create a new client
        Client* createClient( Window w, bool is_mapped );
        void addClient( Client* c, allowed_t );

        Window findSpecialEventWindow( XEvent* e );

        void randomPlacement(Client* c);
        void smartPlacement(Client* c);
        void cascadePlacement(Client* c, bool re_init = false);

        bool addSystemTrayWin( WId w );
        bool removeSystemTrayWin( WId w, bool check );
        void propagateSystemTrayWins();
        SystemTrayWindow findSystemTrayWin( WId w );

    // desktop names and number of desktops
        void loadDesktopSettings();
        void saveDesktopSettings();

    // mouse emulation
        WId getMouseEmulationWindow();
        enum MouseEmulation { EmuPress, EmuRelease, EmuMove };
        unsigned int sendFakedMouseEvent( QPoint pos, WId win, MouseEmulation type, int button, unsigned int state ); // returns the new state

        void tabBoxKeyPress( const KKeyNative& keyX );
        void tabBoxKeyRelease( const XKeyEvent& ev );

    // electric borders
        void checkElectricBorders();
        void createBorderWindows();
        void destroyBorderWindows();
        void electricBorder(XEvent * e);
        void raiseElectricBorders();

    // ------------------
    
        void helperDialog( const QString& message, const Client* c );

        void calcDesktopLayout(int &x, int &y);

        QPopupMenu* clientPopup();

        void updateClientArea( bool force );

        SystemTrayWindowList systemTrayWins;

        int current_desktop;
        int number_of_desktops;
        QMemArray<int> desktop_focus_chain;

        Client* popup_client;

        QWidget* desktop_widget;

        void loadSessionInfo();
        void loadWindowRules();
        void writeWindowRules();
        void editWindowRules( Client* );

        QPtrList<SessionInfo> session;
        QValueList<WindowRules*> windowRules;
        static const char* windowTypeToTxt( NET::WindowType type );
        static NET::WindowType txtToWindowType( const char* txt );
        static bool sessionInfoWindowTypeMatch( Client* c, SessionInfo* info );

        Client* active_client;
        Client* last_active_client;
        Client* most_recently_raised; // used _only_ by raiseOrLowerClient()
        Client* movingClient;
        Client* pending_take_activity;

    // delay(ed) window focus timer and client
        QTimer* delayFocusTimer;
        Client* delayfocus_client;

        ClientList clients;
        ClientList desktops;

        ClientList unconstrained_stacking_order;
        ClientList stacking_order;
        ClientList focus_chain;
        ClientList should_get_focus; // last is most recent
        ClientList attention_chain;

        GroupList groups;

        bool was_user_interaction;
        bool session_saving;
        int session_active_client;
        int session_desktop;

        bool control_grab;
        bool tab_grab;
    //KKeyNative walkThroughDesktopsKeycode, walkBackThroughDesktopsKeycode;
    //KKeyNative walkThroughDesktopListKeycode, walkBackThroughDesktopListKeycode;
    //KKeyNative walkThroughWindowsKeycode, walkBackThroughWindowsKeycode;
        KShortcut cutWalkThroughDesktops, cutWalkThroughDesktopsReverse;
        KShortcut cutWalkThroughDesktopList, cutWalkThroughDesktopListReverse;
        KShortcut cutWalkThroughWindows, cutWalkThroughWindowsReverse;
        bool mouse_emulation;
        unsigned int mouse_emulation_state;
        WId mouse_emulation_window;
        int block_focus;

        TabBox* tab_box;
        PopupInfo* popupinfo;

        QPopupMenu *popup;
        QPopupMenu *advanced_popup;
        QPopupMenu *desk_popup;
        int desk_popup_index;

        KGlobalAccel *keys;
        WId root;

        PluginMgr *mgr;

        RootInfo *rootInfo;
        QWidget* supportWindow;

    // swallowing
        QStringList doNotManageList;

    // colormap handling
        Colormap default_colormap;
        Colormap installed_colormap;

    // Timer to collect requests for 'reconfigure'
        QTimer reconfigureTimer;

        QTimer updateToolWindowsTimer;

        static Workspace *_self;

        bool workspaceInit;

        KStartupInfo* startup;

        bool electric_have_borders;
        int electric_current_border;
        WId electric_top_border;
        WId electric_bottom_border;
        WId electric_left_border;
        WId electric_right_border;
        int electricLeft;
        int electricRight;
        int electricTop;
        int electricBottom;
        Time electric_time_first;
        Time electric_time_last;
        QPoint electric_push_point;

        Qt::Orientation layoutOrientation;
        int layoutX;
        int layoutY;

        Placement *initPositioning;

        QRect* workarea; //  array of workareas for virtual desktops
        QRect** screenarea; // array of workareas per xinerama screen for all virtual desktops

        bool managing_topmenus;
        KSelectionOwner* topmenu_selection;
        KSelectionWatcher* topmenu_watcher;
        ClientList topmenus; // doesn't own them
        mutable int topmenu_height;
        QWidget* topmenu_space;

        int set_active_client_recursion;
        int block_stacking_updates; // when >0, stacking updates are temporarily disabled
        bool blocked_propagating_new_clients; // propagate also new clients after enabling stacking updates?
        Window null_focus_window;
        bool forced_global_mouse_grab;
        friend class StackingUpdatesBlocker;
    };

// helper for Workspace::blockStackingUpdates() being called in pairs (true/false)
class StackingUpdatesBlocker
    {
    public:
        StackingUpdatesBlocker( Workspace* w )
            : ws( w ) { ws->blockStackingUpdates( true ); }
        ~StackingUpdatesBlocker()
            { ws->blockStackingUpdates( false ); }
    private:
        Workspace* ws;
    };

// NET WM Protocol handler class
class RootInfo : public NETRootInfo3
    {
    private:
        typedef KWinInternal::Client Client;  // because of NET::Client
    public:
        RootInfo( Workspace* ws, Display *dpy, Window w, const char *name, unsigned long pr[], int pr_num, int scr= -1);
    protected:
        virtual void changeNumberOfDesktops(int n);
        virtual void changeCurrentDesktop(int d);
//    virtual void changeActiveWindow(Window w); the extended version is used
        virtual void changeActiveWindow(Window w,NET::RequestSource src, Time timestamp, Window active_window);
        virtual void closeWindow(Window w);
        virtual void moveResize(Window w, int x_root, int y_root, unsigned long direction);
        virtual void moveResizeWindow(Window w, int flags, int x, int y, int width, int height );
        virtual void gotPing(Window w, Time timestamp);
        virtual void restackWindow(Window w, RequestSource source, Window above, int detail, Time timestamp);
        virtual void gotTakeActivity(Window w, Time timestamp, long flags );
    private:
        Workspace* workspace;
    };


inline WId Workspace::rootWin() const
    {
    return root;
    }

inline bool Workspace::initializing() const
    {
    return workspaceInit;
    }

inline Client* Workspace::activeClient() const
    {
    return active_client;
    }

inline Client* Workspace::mostRecentlyActivatedClient() const
    {
    return should_get_focus.count() > 0 ? should_get_focus.last() : active_client;
    }

inline int Workspace::currentDesktop() const
    {
    return current_desktop;
    }

inline int Workspace::numberOfDesktops() const
    {
    return number_of_desktops;
    }

inline void Workspace::addGroup( Group* group, allowed_t )
    {
    groups.append( group );
    }

inline void Workspace::removeGroup( Group* group, allowed_t )
    {
    groups.remove( group );
    }

inline const ClientList& Workspace::stackingOrder() const
    {
// TODO    Q_ASSERT( block_stacking_updates == 0 );
    return stacking_order;
    }

inline void Workspace::showWindowMenu(QPoint pos, Client* cl)
    {
    showWindowMenu(pos.x(), pos.y(), cl);
    }

inline
void Workspace::setWasUserInteraction()
    {
    was_user_interaction = true;
    }

inline
bool Workspace::managingTopMenus() const
    {
    return managing_topmenus;
    }

inline void Workspace::sessionSaveStarted()
    {
    session_saving = true;
    }

inline void Workspace::sessionSaveDone()
    {
    session_saving = false;
    }

inline bool Workspace::sessionSaving() const
    {
    return session_saving;
    }

inline bool Workspace::forcedGlobalMouseGrab() const
    {
    return forced_global_mouse_grab;
    }

template< typename T >
inline Client* Workspace::findClient( T predicate )
    {
    if( Client* ret = findClientInList( clients, predicate ))
        return ret;
    if( Client* ret = findClientInList( desktops, predicate ))
        return ret;
    return NULL;
    }

template< typename T1, typename T2 >
inline void Workspace::forEachClient( T1 procedure, T2 predicate )
    {
    for ( ClientList::ConstIterator it = clients.begin(); it != clients.end(); ++it)
        if ( predicate( const_cast< const Client* >( *it)))
            procedure( *it );
    for ( ClientList::ConstIterator it = desktops.begin(); it != desktops.end(); ++it)
        if ( predicate( const_cast< const Client* >( *it)))
            procedure( *it );
    }

template< typename T >
inline void Workspace::forEachClient( T procedure )
    {
    return forEachClient( procedure, TruePredicate());
    }

KWIN_COMPARE_PREDICATE( ClientMatchPredicate, const Client*, cl == value );
inline bool Workspace::hasClient( const Client* c )
    {
    return findClient( ClientMatchPredicate( c ));
    }

} // namespace

#endif