/******************************************************************** KWin - the KDE window manager This file is part of the KDE project. Copyright (C) 2012 Martin Gräßlin This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . *********************************************************************/ #ifndef KWIN_VIRTUAL_DESKTOPS_H #define KWIN_VIRTUAL_DESKTOPS_H // KWin #include #include // Qt includes #include #include #include #include // KDE includes #include #include class KLocalizedString; class NETRootInfo; class QAction; namespace KWayland { namespace Server { class PlasmaVirtualDesktopManagementInterface; } } namespace KWin { class KWIN_EXPORT VirtualDesktop : public QObject { Q_OBJECT Q_PROPERTY(QByteArray id READ id CONSTANT) Q_PROPERTY(uint x11DesktopNumber READ x11DesktopNumber NOTIFY x11DesktopNumberChanged) Q_PROPERTY(QString name READ name WRITE setName NOTIFY nameChanged) public: explicit VirtualDesktop(QObject *parent = nullptr); virtual ~VirtualDesktop(); void setId(const QByteArray &id); QByteArray id() const { return m_id; } void setName(const QString &name); QString name() const { return m_name; } void setX11DesktopNumber(uint number); uint x11DesktopNumber() const { return m_x11DesktopNumber; } Q_SIGNALS: void nameChanged(); void x11DesktopNumberChanged(); /** * Emitted just before the desktop gets destroyed. **/ void aboutToBeDestroyed(); private: QByteArray m_id; QString m_name; int m_x11DesktopNumber = 0; }; /** * @brief Two dimensional grid containing the ID of the virtual desktop at a specific position * in the grid. * * The VirtualDesktopGrid represents a visual layout of the Virtual Desktops as they are in e.g. * a Pager. This grid is used for getting a desktop next to a given desktop in any direction by * making use of the layout information. This allows navigation like move to desktop on left. **/ class VirtualDesktopGrid { public: VirtualDesktopGrid(); ~VirtualDesktopGrid(); void update(const QSize &size, Qt::Orientation orientation, const QVector &desktops); /** * @returns The coords of desktop @a id in grid units. */ QPoint gridCoords(uint id) const; /** * @returns The coords of desktop @a vd in grid units. */ QPoint gridCoords(VirtualDesktop *vd) const; /** * @returns The desktop at the point @a coords or 0 if no desktop exists at that * point. @a coords is to be in grid units. */ VirtualDesktop *at(const QPoint &coords) const; int width() const; int height() const; const QSize &size() const; private: QSize m_size; QVector> m_grid; }; /** * @brief Manages the number of available virtual desktops, the layout of those and which virtual * desktop is the current one. * * This manager is responsible for Virtual Desktop handling inside KWin. It has a property for the * count of available virtual desktops and a property for the currently active virtual desktop. All * changes to the number of virtual desktops and the current virtual desktop need to go through this * manager. * * On all changes a signal is emitted and interested parties should connect to the signal. The manager * itself does not interact with other parts of the system. E.g. it does not hide/show windows of * desktop changes. This is outside the scope of this manager. * * Internally the manager organizes the virtual desktops in a grid allowing to navigate over the * virtual desktops. For this a set of convenient methods are available which allow to get the id * of an adjacent desktop or to switch to an adjacent desktop. Interested parties should make use of * these methods and not replicate the logic to switch to the next desktop. **/ class KWIN_EXPORT VirtualDesktopManager : public QObject { Q_OBJECT /** * The number of virtual desktops currently available. * The ids of the virtual desktops are in the range [1, VirtualDesktopManager::maximum()]. **/ Q_PROPERTY(uint count READ count WRITE setCount NOTIFY countChanged) /** * The id of the virtual desktop which is currently in use. **/ Q_PROPERTY(uint current READ current WRITE setCurrent NOTIFY currentChanged) /** * Whether navigation in the desktop layout wraps around at the borders. **/ Q_PROPERTY(bool navigationWrappingAround READ isNavigationWrappingAround WRITE setNavigationWrappingAround NOTIFY navigationWrappingAroundChanged) public: virtual ~VirtualDesktopManager(); /** * @internal, for X11 case **/ void setRootInfo(NETRootInfo *info); /** * @internal, for Wayland case **/ void setVirtualDesktopManagement(KWayland::Server::PlasmaVirtualDesktopManagementInterface *management); /** * @internal **/ void setConfig(KSharedConfig::Ptr config); /** * @returns Total number of desktops currently in existence. * @see setCount * @see countChanged */ uint count() const; /** * @returns the number of rows the layout has. * @see setRows * @see rowsChanged */ uint rows() const; /** * @returns The ID of the current desktop. * @see setCurrent * @see currentChanged */ uint current() const; /** * @returns The current desktop * @see setCurrent * @see currentChanged **/ VirtualDesktop *currentDesktop() const; /** * Moves to the desktop through the algorithm described by Direction. * @param wrap If @c true wraps around to the other side of the layout * @see setCurrent **/ template void moveTo(bool wrap = false); /** * @returns The name of the @p desktop **/ QString name(uint desktop) const; /** * @returns @c true if navigation at borders of layout wraps around, @c false otherwise * @see setNavigationWrappingAround * @see navigationWrappingAroundChanged **/ bool isNavigationWrappingAround() const; /** * @returns The layout aware virtual desktop grid used by this manager. **/ const VirtualDesktopGrid &grid() const; /** * @returns The ID of the desktop above desktop @a id. Wraps around to the bottom of * the layout if @a wrap is set. If @a id is not set use the current one. */ uint above(uint id = 0, bool wrap = true) const; /** * @returns The desktop above desktop @a desktop. Wraps around to the bottom of * the layout if @a wrap is set. If @a desktop is @c null use the current one. */ VirtualDesktop *above(VirtualDesktop *desktop, bool wrap = true) const; /** * @returns The ID of the desktop to the right of desktop @a id. Wraps around to the * left of the layout if @a wrap is set. If @a id is not set use the current one. */ uint toRight(uint id = 0, bool wrap = true) const; /** * @returns The desktop to the right of desktop @a desktop. Wraps around to the * left of the layout if @a wrap is set. If @a desktop is @c null use the current one. */ VirtualDesktop *toRight(VirtualDesktop *desktop, bool wrap = true) const; /** * @returns The ID of the desktop below desktop @a id. Wraps around to the top of the * layout if @a wrap is set. If @a id is not set use the current one. */ uint below(uint id = 0, bool wrap = true) const; /** * @returns The desktop below desktop @a desktop. Wraps around to the top of the * layout if @a wrap is set. If @a desktop is @c null use the current one. */ VirtualDesktop *below(VirtualDesktop *desktop, bool wrap = true) const; /** * @returns The ID of the desktop to the left of desktop @a id. Wraps around to the * right of the layout if @a wrap is set. If @a id is not set use the current one. */ uint toLeft(uint id = 0, bool wrap = true) const; /** * @returns The desktop to the left of desktop @a desktop. Wraps around to the * right of the layout if @a wrap is set. If @a desktop is @c null use the current one. */ VirtualDesktop *toLeft(VirtualDesktop *desktop, bool wrap = true) const; /** * @returns The desktop after the desktop @a desktop. Wraps around to the first * desktop if @a wrap is set. If @a desktop is @c null use the current desktop. **/ VirtualDesktop *next(VirtualDesktop *desktop = nullptr, bool wrap = true) const; /** * @returns The desktop in front of the desktop @a desktop. Wraps around to the * last desktop if @a wrap is set. If @a desktop is @c null use the current desktop. **/ VirtualDesktop *previous(VirtualDesktop *desktop = nullptr, bool wrap = true) const; void initShortcuts(); /** * @returns all currently managed VirtualDesktops **/ QVector desktops() const { return m_desktops; } /** * @returns The VirtualDesktop for the x11 @p id, if no such VirtualDesktop @c null is returned **/ VirtualDesktop *desktopForX11Id(uint id) const; /** * @returns The VirtualDesktop for the internal desktop string @p id, if no such VirtualDesktop @c null is returned **/ VirtualDesktop *desktopForId(const QByteArray &id) const; /** * Create a new virtual desktop at the requested position. * The difference with setCount is that setCount always adds new desktops at the end of the chain. The Id is automatically generated. * @param position The position of the desktop. It should be in range [0, count]. * @param name The name for the new desktop, if empty the default name will be used. * @returns the new VirtualDesktop, nullptr if we reached the maximum number of desktops */ VirtualDesktop *createVirtualDesktop(uint position, const QString &name = QString()); /** * Remove the virtual desktop identified by id, if it exists * difference with setCount is that is possible to remove an arbitrary desktop, * not only the last one. * @param id the string id of the desktop to remove */ void removeVirtualDesktop(const QByteArray &id); /** * Updates the net root info for new number of desktops **/ void updateRootInfo(); /** * @returns The maximum number of desktops that KWin supports. */ static uint maximum(); public Q_SLOTS: /** * Set the number of available desktops to @a count. This function overrides any previous * grid layout. * There needs to be at least one virtual desktop and the new value is capped at the maximum * number of desktops. A caller of this function cannot expect that the change has been applied. * It is the callers responsibility to either check the numberOfDesktops or connect to the * countChanged signal. * * In case the @ref current desktop is on a desktop higher than the new count, the current desktop * is changed to be the new desktop with highest id. In that situation the signal desktopRemoved * is emitted. * @param count The new number of desktops to use * @see count * @see maximum * @see countChanged * @see desktopCreated * @see desktopRemoved */ void setCount(uint count); /** * Set the current desktop to @a current. * @returns True on success, false otherwise. * @see current * @see currentChanged * @see moveTo */ bool setCurrent(uint current); /** * Set the current desktop to @a current. * @returns True on success, false otherwise. * @see current * @see currentChanged * @see moveTo **/ bool setCurrent(VirtualDesktop *current); /** * Updates the layout to a new number of rows. The number of columns will be calculated accordingly */ void setRows(uint rows); /** * Called from within setCount() to ensure the desktop layout is still valid. */ void updateLayout(); /** * @param enabled wrapping around borders for navigation in desktop layout * @see isNavigationWrappingAround * @see navigationWrappingAroundChanged **/ void setNavigationWrappingAround(bool enabled); /** * Loads number of desktops and names from configuration file **/ void load(); /** * Saves number of desktops and names to configuration file **/ void save(); Q_SIGNALS: /** * Signal emitted whenever the number of virtual desktops changes. * @param previousCount The number of desktops prior to the change * @param newCount The new current number of desktops **/ void countChanged(uint previousCount, uint newCount); /** * Signal when the number of rows in the layout changes * @param rows number of rows */ void rowsChanged(uint rows); /** * A new desktop has been created * @param desktop the new just crated desktop */ void desktopCreated(KWin::VirtualDesktop *desktop); /** * A desktop has been removed and is about to be deleted * @param desktop the desktop that has been removed. * It's guaranteed to stil la valid pointer when the signal arrives, * but it's about to be deleted. */ void desktopRemoved(KWin::VirtualDesktop *desktop); /** * Signal emitted whenever the current desktop changes. * @param previousDesktop The virtual desktop changed from * @param newDesktop The virtual desktop changed to **/ void currentChanged(uint previousDesktop, uint newDesktop); /** * Signal emitted whenever the desktop layout changes. * @param columns The new number of columns in the layout * @param rows The new number of rows in the layout **/ void layoutChanged(int columns, int rows); /** * Signal emitted whenever the navigationWrappingAround property changes. **/ void navigationWrappingAroundChanged(); private Q_SLOTS: /** * Common slot for all "Switch to Desktop n" shortcuts. * This method uses the sender() method to access some data. * DO NOT CALL DIRECTLY! ONLY TO BE USED FROM AN ACTION! **/ void slotSwitchTo(); /** * Slot for switch to next desktop action. **/ void slotNext(); /** * Slot for switch to previous desktop action. **/ void slotPrevious(); /** * Slot for switch to right desktop action. **/ void slotRight(); /** * Slot for switch to left desktop action. **/ void slotLeft(); /** * Slot for switch to desktop above action. **/ void slotUp(); /** * Slot for switch to desktop below action. **/ void slotDown(); private: /** * Generate a desktop layout from EWMH _NET_DESKTOP_LAYOUT property parameters. */ void setNETDesktopLayout(Qt::Orientation orientation, uint width, uint height, int startingCorner); /** * @returns A default name for the given @p desktop **/ QString defaultName(int desktop) const; /** * Creates all the global keyboard shortcuts for "Switch To Desktop n" actions. **/ void initSwitchToShortcuts(); /** * Creates an action and connects it to the @p slot in this Manager. This method is * meant to be used for the case that an additional information needs to be stored in * the action and the label. * @param name The name of the action to be created * @param label The localized name for the action to be created * @param value An additional value added to the label and to the created action * @param key The global shortcut for the action * @param slot The slot to invoke when the action is triggered **/ QAction *addAction(const QString &name, const KLocalizedString &label, uint value, const QKeySequence &key, void (VirtualDesktopManager::*slot)()); /** * Creates an action and connects it to the @p slot in this Manager. * Overloaded method for the case that no additional value needs to be passed to the action and * no global shortcut is defined by default. * @param name The name of the action to be created * @param label The localized name for the action to be created * @param slot The slot to invoke when the action is triggered **/ QAction *addAction(const QString &name, const QString &label, void (VirtualDesktopManager::*slot)()); QVector m_desktops; QPointer m_current; quint32 m_rows = 2; bool m_navigationWrapsAround; VirtualDesktopGrid m_grid; // TODO: QPointer NETRootInfo *m_rootInfo; KWayland::Server::PlasmaVirtualDesktopManagementInterface *m_virtualDesktopManagement = nullptr; KSharedConfig::Ptr m_config; KWIN_SINGLETON_VARIABLE(VirtualDesktopManager, s_manager) }; /** * Function object to select the desktop above in the layout. * Note: does not switch to the desktop! **/ class DesktopAbove { public: DesktopAbove() {} /** * @param desktop The desktop from which the desktop above should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already topmost desktop * @returns Id of the desktop above @p desktop **/ uint operator() (uint desktop, bool wrap) { return (*this)(VirtualDesktopManager::self()->desktopForX11Id(desktop), wrap)->x11DesktopNumber(); } /** * @param desktop The desktop from which the desktop above should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already topmost desktop * @returns the desktop above @p desktop **/ VirtualDesktop *operator() (VirtualDesktop *desktop, bool wrap) { return VirtualDesktopManager::self()->above(desktop, wrap); } }; /** * Function object to select the desktop below in the layout. * Note: does not switch to the desktop! **/ class DesktopBelow { public: DesktopBelow() {} /** * @param desktop The desktop from which the desktop below should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already lowest desktop * @returns Id of the desktop below @p desktop **/ uint operator() (uint desktop, bool wrap) { return (*this)(VirtualDesktopManager::self()->desktopForX11Id(desktop), wrap)->x11DesktopNumber(); } /** * @param desktop The desktop from which the desktop below should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already lowest desktop * @returns the desktop below @p desktop **/ VirtualDesktop *operator() (VirtualDesktop *desktop, bool wrap) { return VirtualDesktopManager::self()->below(desktop, wrap); } }; /** * Function object to select the desktop to the left in the layout. * Note: does not switch to the desktop! **/ class DesktopLeft { public: DesktopLeft() {} /** * @param desktop The desktop from which the desktop on the left should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already leftmost desktop * @returns Id of the desktop left of @p desktop **/ uint operator() (uint desktop, bool wrap) { return (*this)(VirtualDesktopManager::self()->desktopForX11Id(desktop), wrap)->x11DesktopNumber(); } /** * @param desktop The desktop from which the desktop on the left should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already leftmost desktop * @returns the desktop left of @p desktop **/ VirtualDesktop *operator() (VirtualDesktop *desktop, bool wrap) { return VirtualDesktopManager::self()->toLeft(desktop, wrap); } }; /** * Function object to select the desktop to the right in the layout. * Note: does not switch to the desktop! **/ class DesktopRight { public: DesktopRight() {} /** * @param desktop The desktop from which the desktop on the right should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already rightmost desktop * @returns Id of the desktop right of @p desktop **/ uint operator() (uint desktop, bool wrap) { return (*this)(VirtualDesktopManager::self()->desktopForX11Id(desktop), wrap)->x11DesktopNumber(); } /** * @param desktop The desktop from which the desktop on the right should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already rightmost desktop * @returns the desktop right of @p desktop **/ VirtualDesktop *operator() (VirtualDesktop *desktop, bool wrap) { return VirtualDesktopManager::self()->toRight(desktop, wrap); } }; /** * Function object to select the next desktop in the layout. * Note: does not switch to the desktop! **/ class DesktopNext { public: DesktopNext() {} /** * @param desktop The desktop from which the next desktop should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already last desktop * @returns Id of the next desktop **/ uint operator() (uint desktop, bool wrap) { return (*this)(VirtualDesktopManager::self()->desktopForX11Id(desktop), wrap)->x11DesktopNumber(); } /** * @param desktop The desktop from which the next desktop should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already last desktop * @returns the next desktop **/ VirtualDesktop *operator() (VirtualDesktop *desktop, bool wrap) { return VirtualDesktopManager::self()->next(desktop, wrap); } }; /** * Function object to select the previous desktop in the layout. * Note: does not switch to the desktop! **/ class DesktopPrevious { public: DesktopPrevious() {} /** * @param desktop The desktop from which the previous desktop should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already first desktop * @returns Id of the previous desktop **/ uint operator() (uint desktop, bool wrap) { return (*this)(VirtualDesktopManager::self()->desktopForX11Id(desktop), wrap)->x11DesktopNumber(); } /** * @param desktop The desktop from which the previous desktop should be selected. If @c 0 the current desktop is used * @param wrap Whether to wrap around if already first desktop * @returns the previous desktop **/ VirtualDesktop *operator() (VirtualDesktop *desktop, bool wrap) { return VirtualDesktopManager::self()->previous(desktop, wrap); } }; /** * Helper function to get the ID of a virtual desktop in the direction from * the given @p desktop. If @c 0 the current desktop is used as a starting point. * @param desktop The desktop from which the desktop in given Direction should be selected. * @param wrap Whether desktop navigation wraps around at the borders of the layout * @returns The next desktop in specified direction **/ template uint getDesktop(int desktop = 0, bool wrap = true); template uint getDesktop(int d, bool wrap) { Direction direction; return direction(d, wrap); } inline int VirtualDesktopGrid::width() const { return m_size.width(); } inline int VirtualDesktopGrid::height() const { return m_size.height(); } inline const QSize &VirtualDesktopGrid::size() const { return m_size; } inline uint VirtualDesktopManager::maximum() { return 20; } inline uint VirtualDesktopManager::count() const { return m_desktops.count(); } inline bool VirtualDesktopManager::isNavigationWrappingAround() const { return m_navigationWrapsAround; } inline void VirtualDesktopManager::setConfig(KSharedConfig::Ptr config) { m_config = config; } inline const VirtualDesktopGrid &VirtualDesktopManager::grid() const { return m_grid; } template void VirtualDesktopManager::moveTo(bool wrap) { Direction functor; setCurrent(functor(nullptr, wrap)); } } // namespace KWin #endif