File indexing completed on 2024-04-14 03:57:03

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 1999 Matthias Ettrich <ettrich@kde.org>
     SPDX-FileCopyrightText: 2007 Lubos Lunak <l.lunak@kde.org>
 
     SPDX-License-Identifier: LGPL-2.1-or-later
 */
 
 #ifndef KX11EXTRAS_H
 #define KX11EXTRAS_H
 
 #include <QObject>
 #include <QWindow>
 
 #include <kwindowsystem_export.h>
 
 #include "netwm_def.h"
 
 class NETWinInfo;
 class NETEventFilter;
 
 /**
  * A collection of functions to obtain information from and manipulate
  * X11 windows. These are generally not applicable to other window systems
  *
  * @since 5.101
  */
 class KWINDOWSYSTEM_EXPORT KX11Extras : public QObject
 {
     Q_OBJECT
 
     /**
      * @brief Whether desktop compositing is active
      */
     Q_PROPERTY(bool compositingActive READ compositingActive NOTIFY compositingChanged)
 
 public:
     static KX11Extras *self();
 
     /**
      * Returns the list of all toplevel windows currently managed by the
      * window manager in the order of creation. Please do not rely on
      * indexes of this list: Whenever you enter Qt's event loop in your
      * application, it may happen that entries are removed or added.
      * Your module should perhaps work on a copy of this list and verify a
      * window with hasWId() before any operations.
      *
      * Iteration over this list can be done easily with
      * \code
      *  QList<WId> windows = KWindowSystem::windows();
      *  for (auto it = windows.cbegin(), end = windows.cend(); it != end; ++it) {
      *     ... do something here,  (*it) is the current WId.
      *  }
      * \endcode
      * @return the list of all toplevel windows
      */
     static QList<WId> windows();
 
     /**
      * Test to see if @p id still managed at present.
      * @param id the window id to test
      * @return true if the window id is still managed
      **/
     static bool hasWId(WId id);
 
     /**
      * Returns the list of all toplevel windows currently managed by the
      * window manager in the current stacking order (from lower to
      * higher). May be useful for pagers.
      * @return the list of all toplevel windows in stacking order
      */
     static QList<WId> stackingOrder();
 
     /**
      * Returns the currently active window, or 0 if no window is active.
      * @return the window id of the active window, or 0 if no window is
      *  active
      **/
     static WId activeWindow();
 
     /**
      * Requests that window @p win is activated.
      *
      * There are two ways how to activate a window, by calling
      * activateWindow() and forceActiveWindow(). Generally,
      * applications shouldn't make attempts to explicitly activate
      * their windows, and instead let the user to activate them.
      * In the special cases where this may be needed, applications
      * should use activateWindow(). Window manager may consider whether
      * this request wouldn't result in focus stealing, which
      * would be obtrusive, and may refuse the request.
      *
      * The usage of forceActiveWindow() is meant only for pagers
      * and similar tools, which represent direct user actions
      * related to window manipulation.
      * Except for rare cases, this request will be always honored,
      * and normal applications are forbidden to use it.
      *
      * In case of problems, consult the KWin README in the kdebase
      * package (kdebase/kwin/README), or ask on the kwin@kde.org
      * mailing list.
      *
      * @param win the id of the window to make active
      * @param time X server timestamp of the user activity that
      *    caused this request
      */
     static void activateWindow(WId win, long time = 0);
 
     /**
      * Sets window @p win to be the active window. Note that this
      * should be called only in special cases, applications
      * shouldn't force themselves or other windows to be the active
      * window. Generally, this call should used only by pagers
      * and similar tools. See the explanation in description
      * of activateWindow().
      *
      * @param win the id of the window to make active
      * @param time X server timestamp of the user activity that
      *    caused this request
      */
     static void forceActiveWindow(WId win, long time = 0);
 
     /**
      * Sets window @p win to be the active window. Note that this
      * should be called only in special cases, applications
      * shouldn't force themselves or other windows to be the active
      * window. Generally, this call should used only by pagers
      * and similar tools. See the explanation in the description
      * of activateWindow().
      *
      * @param win the window to make active
      * @param time X server timestamp of the user activity that
      *    caused this request
      * @since 6.0
      */
     Q_INVOKABLE static void forceActiveWindow(QWindow *window, long time = 0);
 
     /**
      * Returns true if a compositing manager is running (i.e. ARGB windows
      * are supported, effects will be provided, etc.).
      */
     static bool compositingActive();
 
     /**
      * Returns the current virtual desktop.
      * @return the current virtual desktop
      **/
     static int currentDesktop();
 
     /**
      * Returns the number of virtual desktops.
      * @return the number of virtual desktops
      **/
     static int numberOfDesktops();
 
     /**
      * Convenience function to set the current desktop to @p desktop.
      * See NETRootInfo.
      * @param desktop the number of the new desktop
      */
     static void setCurrentDesktop(int desktop);
 
     /**
      * Sets window @p win to be present on all virtual desktops if @p
      * is true. Otherwise the window lives only on one single desktop.
      *
      * @param win the id of the window
      * @param b true to show the window on all desktops, false
      *          otherwise
      */
     static void setOnAllDesktops(WId win, bool b);
 
     /**
      * Moves window @p win to desktop @p desktop.
      *
      * @param win the id of the window
      * @param desktop the number of the new desktop
      */
     static void setOnDesktop(WId win, int desktop);
 
     /**
      * Moves window @p win to activities @p activities.
      *
      * @param win the id of the window
      * @param activities the list of activity UUIDs
      *
      * @see KWindowInfo::activities
      */
     static void setOnActivities(WId win, const QStringList &activities);
 
     /**
      * Returns an icon for window @p win.
      *
      * If  @p width and @p height are specified, the best icon for the requested
      * size is returned.
      *
      * If @p scale is true, the icon is smooth-scaled to have exactly
      * the requested size.
      *
      * @param win the id of the window
      * @param width the desired width, or -1
      * @param height the desired height, or -1
      * @param scale if true the icon will be scaled to the desired size. Otherwise the
      *        icon will not be modified.
      * @return the icon of the window
      */
     static QPixmap icon(WId win, int width = -1, int height = -1, bool scale = false);
 
     /**
      * Masks specifying from which sources to read an icon. They are tried from the best
      * until an icon is found.
      * @li NETWM from property from the window manager specification
      * @li WMHints from WMHints property
      * @li ClassHint load icon after getting name from the classhint
      * @li XApp load the standard X icon (last fallback)
      */
     enum IconSource {
         NETWM = 1, //!< read from property from the window manager specification
         WMHints = 2, //!< read from WMHints property
         ClassHint = 4, //!< load icon after getting name from the classhint
         XApp = 8, //!< load the standard X icon (last fallback)
     };
     /**
      * @overload
      *
      * Overloaded variant that allows specifying from which sources the icon should be read.
      * You should usually prefer the simpler variant which tries all possibilities to get
      * an icon.
      *
      * @param win the id of the window
      * @param width the desired width, or -1
      * @param height the desired height, or -1
      * @param scale if true the icon will be scaled to the desired size. Otherwise the
      *        icon will not be modified.
      * @param flags OR-ed flags from the IconSource enum
      */
     static QPixmap icon(WId win, int width, int height, bool scale, int flags);
 
     /**
      * @overload
      *
      * Overloaded variant that allows passing in the NETWinInfo to use for reading the
      * information. This variant is only useful on the X11 platform, other platforms do not
      * use NETWinInfo and delegate to the variant without NETWinInfo. Though if compiled with
      * X11 support the X11 variant is used on other platforms if info is not @c nullptr.
      * This can be used by applications using e.g. platform wayland but also connecting to an
      * XServer.
      *
      * The NETWinInfo must be constructed with property NET::WMIcon in order to use the
      * IconSource flag NETWM. NET::WM2IconPixmap for IconSource flag WMHints and
      * NET::WM2WindowClass for IconSource flag ClassHint.
      *
      * @param win the id of the window
      * @param width the desired width, or -1
      * @param height the desired height, or -1
      * @param scale if true the icon will be scaled to the desired size. Otherwise the
      *        icon will not be modified.
      * @param flags OR-ed flags from the IconSource enum
      * @param into the NETWinInfo to use for reading properties.
      **/
     static QPixmap icon(WId win, int width, int height, bool scale, int flags, NETWinInfo *info);
 
     /**
      * Minimizes the window with id @p win.
      * On X11 this follows the protocol described in ICCCM section 4.1.4.
      *
      * @param win The window to minimize
      * @see unminimizeWindow()
      */
     static void minimizeWindow(WId win);
     /**
      * Unminimizes the window with id @p win.
      * On X11 this follows the protocol described in ICCCM section 4.1.4.
      *
      * @param win The window to unminimize
      * @see minimizeWindow()
      **/
     static void unminimizeWindow(WId win);
 
     /**
      * Returns the workarea for the specified desktop, or the current
      * work area if no desktop has been specified.
      * @param desktop the number of the desktop to check, -1 for the
      *        current desktop
      * @return the size and position of the desktop
      **/
     static QRect workArea(int desktop = -1);
 
     /**
      * Returns the workarea for the specified desktop, or the current
      * work area if no desktop has been specified. Excludes struts of
      * clients in the exclude List.
      *
      * @param excludes the list of clients whose struts will be excluded
      * @param desktop the number of the desktop to check, -1 for the
      *        current desktop
      * @return the size and position of the desktop
      **/
     static QRect workArea(const QList<WId> &excludes, int desktop = -1);
 
     /**
      * Returns the name of the specified desktop.
      * @param desktop the number of the desktop
      * @return the name of the desktop
      **/
     static QString desktopName(int desktop);
 
     /**
      * Sets the name of the specified desktop.
      * @param desktop the number of the desktop
      * @param name the new name for the desktop
      **/
     static void setDesktopName(int desktop, const QString &name);
 
     /**
      * Function that reads and returns the contents of the given text
      * property (WM_NAME, WM_ICON_NAME,...).
      */
     static QString readNameProperty(WId window, unsigned long atom);
 
     /**
      * Returns true if viewports are mapped to virtual desktops.
      */
     static bool mapViewport();
 
     /**
      * Sets the strut of window @p win to @p left_width
      * ranging from @p left_start to @p left_end on the left edge,
      * and simiarly for the other edges. For not reserving a strut, pass 0 as the width.
      * E.g. to reserve 10x10 square in the topleft corner, use e.g.
      * setExtendedStrut( w, 10, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0 ).
      *
      * @param win the id of the window
      * @param left_width width of the strut at the left edge
      * @param left_start starting y coordinate of the strut at the left edge
      * @param left_end ending y coordinate of the strut at the left edge
      * @param right_width width of the strut at the right edge
      * @param right_start starting y coordinate of the strut at the right edge
      * @param right_end ending y coordinate of the strut at the right edge
      * @param top_width width of the strut at the top edge
      * @param top_start starting x coordinate of the strut at the top edge
      * @param top_end ending x coordinate of the strut at the top edge
      * @param bottom_width width of the strut at the bottom edge
      * @param bottom_start starting x coordinate of the strut at the bottom edge
      * @param bottom_end ending x coordinate of the strut at the bottom edge
      */
     static void setExtendedStrut(WId win,
                                  qreal left_width,
                                  qreal left_start,
                                  qreal left_end,
                                  qreal right_width,
                                  qreal right_start,
                                  qreal right_end,
                                  qreal top_width,
                                  qreal top_start,
                                  qreal top_end,
                                  qreal bottom_width,
                                  qreal bottom_start,
                                  qreal bottom_end);
     /**
      * Convenience function for setExtendedStrut() that automatically makes struts
      * as wide/high as the screen width/height.
      * Sets the strut of window @p win to @p left, @p right, @p top, @p bottom.
      *
      * @param win the id of the window
      * @param left the left strut
      * @param right the right strut
      * @param top the top strut
      * @param bottom the bottom strut
      */
     static void setStrut(WId win, qreal left, qreal right, qreal top, qreal bottom);
 
     /**
      * Sets the type of window @p win to @p windowType.
      *
      * @param win the id of the window
      * @param windowType the type of the window (see NET::WindowType)
      *
      * @since 6.0
      */
     static void setType(WId win, NET::WindowType windowType);
 
     /**
      * Clears the state of window @p win from @p state.
      *
      * Possible values are or'ed combinations of NET::Modal,
      * NET::Sticky, NET::MaxVert, NET::MaxHoriz, NET::Shaded,
      * NET::SkipTaskbar, NET::SkipPager, NET::Hidden,
      * NET::FullScreen, NET::KeepAbove, NET::KeepBelow,
      * NET::SkipSwitcher
      *
      * @param win the id of the window
      * @param state the flags that will be cleared
      *
      * @since 6.0
      */
     static void clearState(WId win, NET::States state);
 
     /**
      * Sets the state of window @p win to @p state.
      *
      * Possible values are or'ed combinations of NET::Modal,
      * NET::Sticky, NET::MaxVert, NET::MaxHoriz, NET::Shaded,
      * NET::SkipTaskbar, NET::SkipPager, NET::Hidden,
      * NET::FullScreen, NET::KeepAbove, NET::KeepBelow,
      * NET::SkipSwitcher
      *
      * @param win the id of the window
      * @param state the new flags that will be set
      *
      * @since 6.0
      */
     static void setState(WId win, NET::States state);
 
 Q_SIGNALS:
 
     /**
      * Switched to another virtual desktop.
      * @param desktop the number of the new desktop
      */
     void currentDesktopChanged(int desktop);
 
     /**
      * A window has been added.
      * @param id the id of the window
      */
     void windowAdded(WId id);
 
     /**
      * A window has been removed.
      * @param id the id of the window that has been removed
      */
     void windowRemoved(WId id);
 
     /**
      * Hint that \<Window> is active (= has focus) now.
      * @param id the id of the window that is active
      */
     void activeWindowChanged(WId id);
 
     /**
      * Desktops have been renamed.
      */
     void desktopNamesChanged();
 
     /**
      * The number of desktops changed.
      * @param num the new number of desktops
      */
     void numberOfDesktopsChanged(int num);
 
     /**
      * The workarea has changed.
      */
     void workAreaChanged();
 
     /**
      * Something changed with the struts, may or may not have changed
      * the work area. Usually just using the workAreaChanged() signal
      * is sufficient.
      */
     void strutChanged();
 
     /**
      * Emitted when the stacking order of the window changed. The new order
      * can be obtained with stackingOrder().
      */
     void stackingOrderChanged();
 
     /**
      * The window changed.
      *
      * Carries the NET::Properties and NET::Properties2 that were changed.
      *
      * @param id the id of the window
      * @param properties the properties that were modified
      * @param properties2 the properties2 that were modified
      */
     void windowChanged(WId id, NET::Properties properties, NET::Properties2 properties2);
 
     /**
      * Compositing was enabled or disabled.
      *
      * Note that this signal may be emitted before any compositing plugins
      * have been initialized in the window manager.
      *
      * If you need to check if a specific compositing plugin such as the
      * blur effect is enabled, you should track that separately rather
      * than test for it in a slot connected to this signal.
      */
     void compositingChanged(bool enabled);
 
 protected:
     void connectNotify(const QMetaMethod &signal) override;
 
 private:
     friend class KWindowInfo;
     friend class KWindowSystemPrivateX11;
     friend class NETEventFilter;
     friend class MainThreadInstantiator;
 
     enum FilterInfo {
         INFO_BASIC = 1, // desktop info, not per-window
         INFO_WINDOWS = 2, // also per-window info
     };
 
     KWINDOWSYSTEM_NO_EXPORT void init(FilterInfo info);
     KWINDOWSYSTEM_NO_EXPORT QPoint desktopToViewport(int desktop, bool absolute);
     KWINDOWSYSTEM_NO_EXPORT int viewportToDesktop(const QPoint &pos);
 
     KWINDOWSYSTEM_NO_EXPORT QPoint constrainViewportRelativePosition(const QPoint &pos);
 
     // used in xcb/kwindowsystem.cpp
     static bool showingDesktop();
     static void setShowingDesktop(bool showing);
 
     /**
      * @internal
      * Returns mapped virtual desktop for the given window geometry.
      */
     KWINDOWSYSTEM_NO_EXPORT static int viewportWindowToDesktop(const QRect &r);
 
     KWINDOWSYSTEM_NO_EXPORT NETEventFilter *s_d_func()
     {
         return d.get();
     }
     std::unique_ptr<NETEventFilter> d;
 };
 
 #endif