/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-

   client.h for the Openbox window manager
   Copyright (c) 2006        Mikael Magnusson
   Copyright (c) 2003-2007   Dana Jansens

   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.

   See the COPYING file for a copy of the GNU General Public License.
*/

#ifndef __client_h
#define __client_h

#include "misc.h"
#include "mwm.h"
#include "geom.h"
#include "stacking.h"
#include "render/color.h"

#include <glib.h>
#include <X11/Xlib.h>

struct _ObFrame;
struct _ObGroup;
struct _ObSessionState;
struct _ObClientTimeHeap;

typedef struct _ObClient      ObClient;
typedef struct _ObClientIcon  ObClientIcon;
typedef struct _ObAppSettings ObAppSettings;

/* The value in client.transient_for indicating it is a transient for its
   group instead of for a single window */
#define OB_TRAN_GROUP ((void*)~0l)

/*! Holds an icon in ARGB format */
struct _ObClientIcon
{
    gint width;
    gint height;
    RrPixel32 *data;
};
     
/*! Possible window types */
typedef enum
{
    OB_CLIENT_TYPE_DESKTOP, /*!< A desktop (bottom-most window) */
    OB_CLIENT_TYPE_DOCK,    /*!< A dock bar/panel window */
    OB_CLIENT_TYPE_TOOLBAR, /*!< A toolbar window, pulled off an app */
    OB_CLIENT_TYPE_MENU,    /*!< An unpinned menu from an app */
    OB_CLIENT_TYPE_UTILITY, /*!< A small utility window such as a palette */
    OB_CLIENT_TYPE_SPLASH,  /*!< A splash screen window */
    OB_CLIENT_TYPE_DIALOG,  /*!< A dialog window */
    OB_CLIENT_TYPE_NORMAL   /*!< A normal application window */
} ObClientType;

/*! The things the user can do to the client window */
typedef enum
{
    OB_CLIENT_FUNC_RESIZE     = 1 << 0, /*!< Allow user resizing */
    OB_CLIENT_FUNC_MOVE       = 1 << 1, /*!< Allow user moving */
    OB_CLIENT_FUNC_ICONIFY    = 1 << 2, /*!< Allow to be iconified */
    OB_CLIENT_FUNC_MAXIMIZE   = 1 << 3, /*!< Allow to be maximized */
    OB_CLIENT_FUNC_SHADE      = 1 << 4, /*!< Allow to be shaded */
    OB_CLIENT_FUNC_FULLSCREEN = 1 << 5, /*!< Allow to be made fullscreen */
    OB_CLIENT_FUNC_CLOSE      = 1 << 6  /*!< Allow to be closed */
} ObFunctions;

struct _ObClient
{
    ObWindow obwin;

    Window  window;

    /*! The window's decorations. NULL while the window is being managed! */
    struct _ObFrame *frame;

    /*! The number of unmap events to ignore on the window */
    gint ignore_unmaps;

    /*! The id of the group the window belongs to */
    struct _ObGroup *group;

    /*! Saved session data to apply to this client */
    struct _ObSessionState *session;

    /*! Whether or not the client is a transient window. This is guaranteed to 
      be TRUE if transient_for != NULL, but not guaranteed to be FALSE if
      transient_for == NULL. */
    gboolean transient;
    /*! The client which this client is a transient (child) for.
      A value of TRAN_GROUP signifies that the window is a transient for all
      members of its ObGroup, and is not a valid pointer to be followed in this
      case.
     */
    ObClient *transient_for;
    /*! The clients which are transients (children) of this client */
    GSList *transients;
    /*! The desktop on which the window resides (0xffffffff for all
      desktops) */
    guint desktop;

    /*! The startup id for the startup-notification protocol. This will be
      NULL if a startup id is not set. */
    gchar *startup_id;

    /*! Normal window title */
    gchar *title;
    /*! Window title when iconified */
    gchar *icon_title;

    /*! The application that created the window */
    gchar *name;
    /*! The class of the window, can used for grouping */
    gchar *class;
    /*! The specified role of the window, used for identification */
    gchar *role;
    /*! The session client id for the window. *This can be NULL!* */
    gchar *sm_client_id;

    /*! The type of window (what its function is) */
    ObClientType type;

    /*! Position and size of the window
      This will not always be the actual position of the window on screen, it
      is, rather, the position requested by the client, to which the window's
      gravity is applied.
    */
    Rect area;

    /*! Position of the client window relative to the root window */
    Point root_pos;

    /*! Position and size of the window prior to being maximized */
    Rect pre_max_area;
    /*! Position and size of the window prior to being fullscreened */
    Rect pre_fullscreen_area;

    /*! The window's strut
      The strut defines areas of the screen that are marked off-bounds for
      window placement. In theory, where this window exists.
    */
    StrutPartial strut;
     
    /*! The logical size of the window
      The "logical" size of the window is refers to the user's perception of
      the size of the window, and is the value that should be displayed to the
      user. For example, with xterms, this value it the number of characters
      being displayed in the terminal, instead of the number of pixels.
    */
    Size logical_size;

    /*! Width of the border on the window.
      The window manager will set this to 0 while the window is being managed,
      but needs to restore it afterwards, so it is saved here.
    */
    guint border_width;

    /*! The minimum aspect ratio the client window can be sized to.
      A value of 0 means this is ignored.
    */
    gfloat min_ratio;
    /*! The maximum aspect ratio the client window can be sized to.
      A value of 0 means this is ignored.
    */
    gfloat max_ratio;
  
    /*! The minimum size of the client window
      If the min is > the max, then the window is not resizable
    */
    Size min_size;
    /*! The maximum size of the client window
      If the min is > the max, then the window is not resizable
    */
    Size max_size;
    /*! The size of increments to resize the client window by */
    Size size_inc;
    /*! The base size of the client window
      This value should be subtracted from the window's actual size when
      displaying its size to the user, or working with its min/max size
    */
    Size base_size;

    /*! Window decoration and functionality hints */
    ObMwmHints mwmhints;
  
    /*! Where to place the decorated window in relation to the undecorated
      window */
    gint gravity;

    /*! The state of the window, one of WithdrawnState, IconicState, or
      NormalState */
    glong wmstate;

    /*! True if the client supports the delete_window protocol */
    gboolean delete_window;
  
    /*! Was the window's position requested by the application or the user?
      if by the application, we force it completely onscreen, if by the user
      we only force it if it tries to go completely offscreen, if neither, we
      should place the window ourselves when it first appears */
    guint positioned;
  
    /*! Can the window receive input focus? */
    gboolean can_focus;
    /*! Notify the window when it receives focus? */
    gboolean focus_notify;

    /*! The window uses shape extension to be non-rectangular? */
    gboolean shaped;

    /*! The window is modal, so it must be processed before any windows it is
      related to can be focused */
    gboolean modal;
    /*! Only the window's titlebar is displayed */
    gboolean shaded;
    /*! The window is iconified */
    gboolean iconic;
    /*! The window is maximized to fill the screen vertically */
    gboolean max_vert;
    /*! The window is maximized to fill the screen horizontally */
    gboolean max_horz;
    /*! The window should not be displayed by pagers */
    gboolean skip_pager;
    /*! The window should not be displayed by taskbars */
    gboolean skip_taskbar;
    /*! The window is a 'fullscreen' window, and should be on top of all
      others */
    gboolean fullscreen;
    /*! The window should be on top of other windows of the same type.
      above takes priority over below. */
    gboolean above;
    /*! The window should be underneath other windows of the same type.
      above takes priority over below. */
    gboolean below;
    /*! Demands attention flag */
    gboolean demands_attention;

    /*! The layer in which the window will be stacked, windows in lower layers
      are always below windows in higher layers. */
    ObStackingLayer layer;

    /*! A bitmask of values in the ObFrameDecorations enum
      The values in the variable are the decorations that the client wants to
      be displayed around it.
    */
    guint decorations;

    /*! A user option. When this is set to TRUE the client will not ever
      be decorated.
    */
    gboolean undecorated;

    /*! A bitmask of values in the ObFunctions enum
      The values in the variable specify the ways in which the user is allowed
      to modify this window.
    */
    guint functions;

    /*! Icons for the client as specified on the client window */
    ObClientIcon *icons;
    /*! The number of icons in icons */
    guint nicons;

    guint32 user_time;
};

struct _ObAppSettings
{
    gchar *class;
    gchar *name;
    gchar *role;

    Point position;
    gboolean center_x;
    gboolean center_y;
    gboolean pos_given;

    guint desktop;
    gint shade;
    gint decor;
    gint focus;
    gint head;
    gint iconic;
    gint skip_pager;
    gint skip_taskbar;
    gint max_horz;
    gint max_vert;
    gint fullscreen;

    gint layer;
};

extern GList *client_list;
extern struct _ObClientTimeHeap *client_user_times;

void client_startup(gboolean reconfig);
void client_shutdown(gboolean reconfig);

typedef void (*ObClientDestructor)(ObClient *client, gpointer data);

void client_add_destructor(ObClientDestructor func, gpointer data);
void client_remove_destructor(ObClientDestructor func);

/*! Manages all existing windows */
void client_manage_all();
/*! Manages a given window */
void client_manage(Window win);
/*! Unmanages all managed windows */
void client_unmanage_all();
/*! Unmanages a given client */
void client_unmanage(ObClient *client);

/*! Sets the client list on the root window from the client_list */
void client_set_list();

/*! Determines if the client should be shown or hidden currently.
  @return TRUE if it should be visible; otherwise, FALSE.
*/
gboolean client_should_show(ObClient *self);

/*! Returns if the window should be treated as a normal window.
  Some windows (desktops, docks, splash screens) have special rules applied
  to them in a number of places regarding focus or user interaction. */
gboolean client_normal(ObClient *self);

/* Returns if the window is focused */
gboolean client_focused(ObClient *self);

#define client_move(self, x, y) \
  client_configure(self, OB_CORNER_TOPLEFT, x, y, \
                   self->area.width, self->area.height, \
                   TRUE, TRUE)
#define client_resize(self, w, h) \
  client_configure(self, OB_CORNER_TOPLEFT, self->area.x, self->area.y, \
                   w, h, TRUE, TRUE)
#define client_move_resize(self, x, y, w, h) \
  client_configure(self, OB_CORNER_TOPLEFT, x, y, w, h, TRUE, TRUE)

#define client_configure(self, anchor, x, y, w, h, user, final) \
  client_configure_full(self, anchor, x, y, w, h, user, final, FALSE)

/*! Figure out where a window will end up and what size it will be if you
  told it to move/resize to these coordinates.

  These values are what client_configure_full will give the window.

  @param anchor The corner to keep in the same position when resizing.
  @param x The x coordiante of the new position for the client.
  @param y The y coordiante of the new position for the client.
  @param w The width component of the new size for the client.
  @param h The height component of the new size for the client.
  @param logicalw Returns the width component of the new logical width.
                  This value is only returned when the new w or h calculated
                  differ from the ones passed in.
  @param logicalh Returns the height component of the new logical height.
                  This value is only returned when the new w or h calculated
                  differ from the ones passed in.
  @param user Specifies whether this is a user-requested change or a
              program requested change. For program requested changes, the
              constraints are not checked.
*/
void client_try_configure(ObClient *self, ObCorner anchor,
                          gint *x, gint *y, gint *w, gint *h,
                          gint *logicalw, gint *logicalh,
                          gboolean user);

/*! Move and/or resize the window.
  This also maintains things like the client's minsize, and size increments.
  @param anchor The corner to keep in the same position when resizing.
  @param x The x coordiante of the new position for the client.
  @param y The y coordiante of the new position for the client.
  @param w The width component of the new size for the client.
  @param h The height component of the new size for the client.
  @param user Specifies whether this is a user-requested change or a
              program requested change. For program requested changes, the
              constraints are not checked.
  @param final If user is true, then this should specify if this is a final
               configuration. e.g. Final should be FALSE if doing an
               interactive move/resize, and then be TRUE for the last call
               only.
  @param force_reply Send a ConfigureNotify to the client regardless of if
                     the position changed.
*/
void client_configure_full(ObClient *self, ObCorner anchor,
                           gint x, gint y, gint w, gint h,
                           gboolean user, gboolean final,
                           gboolean force_reply);

void client_reconfigure(ObClient *self);

/*! Finds coordinates to keep a client on the screen.
  @param self The client
  @param x The x coord of the client, may be changed.
  @param y The y coord of the client, may be changed.
  @param w The width of the client.
  @param w The height of the client.
  @param rude Be rude about it. If false, it is only moved if it is entirely
              not visible. If true, then make sure the window is inside the
              struts if possible.
  @return true if the client was moved to be on-screen; false if not.
*/
gboolean client_find_onscreen(ObClient *self, gint *x, gint *y, gint w, gint h,
                              gboolean rude);

/*! Moves a client so that it is on screen if it is entirely out of the
  viewable screen.
  @param self The client to move
  @param rude Be rude about it. If false, it is only moved if it is entirely
              not visible. If true, then make sure the window is inside the
              struts if possible.
*/
void client_move_onscreen(ObClient *self, gboolean rude);

/*! Fullscreen's or unfullscreen's the client window
  @param fs true if the window should be made fullscreen; false if it should
            be returned to normal state.
*/
void client_fullscreen(ObClient *self, gboolean fs);

/*! Iconifies or uniconifies the client window
  @param iconic true if the window should be iconified; false if it should be
                restored.
  @param curdesk If iconic is FALSE, then this determines if the window will
                 be uniconified to the current viewable desktop (true) or to
                 its previous desktop (false)
*/
void client_iconify(ObClient *self, gboolean iconic, gboolean curdesk);

/*! Maximize or unmaximize the client window
  @param max true if the window should be maximized; false if it should be
             returned to normal size.
  @param dir 0 to set both horz and vert, 1 to set horz, 2 to set vert.
*/
void client_maximize(ObClient *self, gboolean max, gint dir);

/*! Shades or unshades the client window
  @param shade true if the window should be shaded; false if it should be
               unshaded.
*/
void client_shade(ObClient *self, gboolean shade);

/*! Hilite the window to make the user notice it */
void client_hilite(ObClient *self, gboolean hilite);

/*! Request the client to close its window */
void client_close(ObClient *self);

/*! Kill the client off violently */
void client_kill(ObClient *self);

/*! Sends the window to the specified desktop
  @param donthide If TRUE, the window will not be shown/hidden after its
         desktop has been changed. Generally this should be FALSE. */
void client_set_desktop(ObClient *self, guint target, gboolean donthide);

/*! Show the client if it should be shown. */
void client_show(ObClient *self);

/*! Show the client if it should be shown. */
void client_hide(ObClient *self);

/*! Show the client if it should be shown, and hide it if it should be
  hidden. This is for example, when switching desktops.
*/
void client_showhide(ObClient *self);

/*! Validate client, by making sure no Destroy or Unmap events exist in
  the event queue for the window.
  @return true if the client is valid; false if the client has already
          been unmapped/destroyed, and so is invalid.
*/
gboolean client_validate(ObClient *self);

/*! Sets the wm_state to the specified value */
void client_set_wm_state(ObClient *self, glong state);

/*! Adjusts the window's net_state
  This should not be called as part of the window mapping process! It is for
  use when updating the state post-mapping.<br>
  client_apply_startup_state is used to do the same things during the mapping
  process.
*/
void client_set_state(ObClient *self, Atom action, glong data1, glong data2);

/* Given a ObClient, find the client that focus would actually be sent to if
   you wanted to give focus to the specified ObClient. Will return the same
   ObClient passed to it or another ObClient if appropriate. */
ObClient *client_focus_target(ObClient *self);

/*! Returns what client_focus would return if passed the same client, but
  without focusing it or modifying the focus order lists. */
gboolean client_can_focus(ObClient *self);

/*! Attempt to focus the client window
  NOTE: You should validate the client before calling this !! (client_validate)
*/
gboolean client_focus(ObClient *self);

/*! Activates the client for use, focusing, uniconifying it, etc. To be used
  when the user deliberately selects a window for use.
  @param here If true, then the client is brought to the current desktop;
              otherwise, the desktop is changed to where the client lives.
  @param user If true, then a user action is what requested the activation;
              otherwise, it means an application requested it on its own
*/
void client_activate(ObClient *self, gboolean here, gboolean user);

/*! Calculates the stacking layer for the client window */
void client_calc_layer(ObClient *self);

/*! Raises the client to the top of its stacking layer
  Normally actions call to the client_* functions to make stuff go, but this
  one is an exception. It just fires off an action, which will be queued.
  This is because stacking order rules can be changed by focus state, and so
  any time focus changes you have to wait for it to complete before you can
  properly restart windows. As such, this only queues an action for later
  execution, once the focus change has gone through.
*/
void client_raise(ObClient *self);

/*! Lowers the client to the bottom of its stacking layer
  Normally actions call to the client_* functions to make stuff go, but this
  one is an exception. It just fires off an action, which will be queued.
  This is because stacking order rules can be changed by focus state, and so
  any time focus changes you have to wait for it to complete before you can
  properly restart windows. As such, this only queues an action for later
  execution, once the focus change has gone through.
*/
void client_lower(ObClient *self);

/*! Updates the window's transient status, and any parents of it */
void client_update_transient_for(ObClient *self);
/*! Update the protocols that the window supports and adjusts things if they
  change */
void client_update_protocols(ObClient *self);
/*! Updates the WMNormalHints and adjusts things if they change */
void client_update_normal_hints(ObClient *self);

/*! Updates the WMHints and adjusts things if they change
  @param initstate Whether to read the initial_state property from the
                   WMHints. This should only be used during the mapping
                   process.
*/
void client_update_wmhints(ObClient *self);
/*! Updates the window's title and icon title */
void client_update_title(ObClient *self);
/*! Updates the window's application name and class */
void client_update_class(ObClient *self);
/*! Updates the strut for the client */
void client_update_strut(ObClient *self);
/*! Updates the window's icons */
void client_update_icons(ObClient *self);
/*! Updates the window's user time */
void client_update_user_time(ObClient *self);

/*! Set up what decor should be shown on the window and what functions should
  be allowed (ObClient::decorations and ObClient::functions).
  This also updates the NET_WM_ALLOWED_ACTIONS hint.
*/
void client_setup_decor_and_functions(ObClient *self);

/*! Retrieves the window's type and sets ObClient->type */
void client_get_type(ObClient *self);

const ObClientIcon *client_icon(ObClient *self, gint w, gint h);

/*! Searches a client's direct parents for a focused window. The function does
  not check for the passed client, only for *ONE LEVEL* of its parents.
  If no focused parentt is found, NULL is returned.
*/
ObClient *client_search_focus_parent(ObClient *self);

/*! Searches a client's transients for a focused window. The function does not
  check for the passed client, only for its transients.
  If no focused transient is found, NULL is returned.
*/
ObClient *client_search_focus_tree(ObClient *self);

/*! Searches a client's transient tree for a focused window. The function
  searches up the tree and down other branches as well as the passed client's.
  If no focused client is found, NULL is returned.
*/
ObClient *client_search_focus_tree_full(ObClient *self);

/*! Return a modal child of the client window that can be focused.
    @return A modal child of the client window that can be focused, or 0 if
            none was found.
*/
ObClient *client_search_modal_child(ObClient *self);

/*! Returns a list of top-level windows which this is a transient for.
  It will only contain more than 1 element if the client is transient for its
  group.
*/
GSList *client_search_all_top_parents(ObClient *self);

/*! Returns a window's top level parent. This only counts direct parents,
  not groups if it is transient for its group.
*/
ObClient *client_search_top_parent(ObClient *self);

/*! Is one client a direct child of another (i.e. not through the group.) */
gboolean client_is_direct_child(ObClient *parent, ObClient *child);

/*! Search for a parent of a client. This only searches up *ONE LEVEL*, and
  returns the searched for parent if it is a parent, or NULL if not. */
ObClient *client_search_parent(ObClient *self, ObClient *search);

/*! Search for a transient of a client. The transient is returned if it is one,
  NULL is returned if the given search is not a transient of the client. */
ObClient *client_search_transient(ObClient *self, ObClient *search);

/*! Return the "closest" client in the given direction */
ObClient *client_find_directional(ObClient *c, ObDirection dir);

/*! Return the closest edge in the given direction */
gint client_directional_edge_search(ObClient *c, ObDirection dir, gboolean hang);

/*! Set a client window to be above/below other clients.
  @layer < 0 indicates the client should be placed below other clients.<br>
         = 0 indicates the client should be placed with other clients.<br>
         > 0 indicates the client should be placed above other clients.
*/
void client_set_layer(ObClient *self, gint layer);

/*! Set a client window to have decorations or not */
void client_set_undecorated(ObClient *self, gboolean undecorated);

guint client_monitor(ObClient *self);

void client_update_sm_client_id(ObClient *self);

ObClient* client_under_pointer();

gboolean client_has_group_siblings(ObClient *self);

#endif