/* GDK - The GIMP Drawing Kit
 * Copyright (C) 2019 Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 */

/* Uninstalled header defining types and functions internal to GDK */

#ifndef __GDK_SURFACE_PRIVATE_H__
#define __GDK_SURFACE_PRIVATE_H__

#include <gdk-pixbuf/gdk-pixbuf.h>
#include "gdkenumtypes.h"
#include "gdksurface.h"
#include "gdktoplevel.h"

G_BEGIN_DECLS

typedef enum
{
  GDK_SURFACE_TOPLEVEL,
  GDK_SURFACE_TEMP,
  GDK_SURFACE_POPUP
} GdkSurfaceType;

struct _GdkSurface
{
  GObject parent_instance;

  GdkDisplay *display;

  GdkSurface *transient_for; /* for toplevels */
  GdkSurface *parent;        /* for popups */
  GList *children;           /* popups */

  guint set_is_mapped_source_id;
  gboolean pending_is_mapped;
  gboolean is_mapped;

  int x;
  int y;

  GdkGLContext *gl_paint_context;

  cairo_region_t *update_area;
  guint update_freeze_count;
  GdkFrameClockPhase pending_phases;
  /* This is the update_area that was in effect when the current expose
     started. It may be smaller than the expose area if we'e painting
     more than we have to, but it represents the "true" damage. */
  cairo_region_t *active_update_area;

  GdkToplevelState pending_set_flags;
  GdkToplevelState pending_unset_flags;
  GdkToplevelState state;

  guint8 resize_count;

  guint8 alpha;
  guint8 fullscreen_mode;

  guint modal_hint : 1;
  guint destroyed : 2;
  guint in_update : 1;
  guint frame_clock_events_paused : 1;
  guint autohide : 1;
  guint shortcuts_inhibited : 1;
  guint request_motion : 1;

  guint request_motion_id;

  struct {
    GdkGravity surface_anchor;
    GdkGravity rect_anchor;
  } popup;

  guint update_and_descendants_freeze_count;

  int width, height;

  GdkCursor *cursor;
  GHashTable *device_cursor;

  cairo_region_t *input_region;

  GList *devices_inside;

  GdkFrameClock *frame_clock; /* NULL to use from parent or default */

  GSList *draw_contexts;
  GdkDrawContext *paint_context;

  cairo_region_t *opaque_region;

  GdkSeat *current_shortcuts_inhibited_seat;
};

struct _GdkSurfaceClass
{
  GObjectClass parent_class;

  cairo_surface_t *
               (* ref_cairo_surface)    (GdkSurface      *surface);
  void         (* hide)                 (GdkSurface      *surface);
  void         (* get_geometry)         (GdkSurface      *surface,
                                         int             *x,
                                         int             *y,
                                         int             *width,
                                         int             *height);
  void         (* get_root_coords)      (GdkSurface      *surface,
                                         int              x,
                                         int              y,
                                         int             *root_x,
                                         int             *root_y);
  gboolean     (* get_device_state)     (GdkSurface      *surface,
                                         GdkDevice       *device,
                                         double          *x,
                                         double          *y,
                                         GdkModifierType *mask);
  void         (* set_input_region)     (GdkSurface      *surface,
                                         cairo_region_t  *shape_region);

  /* Called to do the windowing system specific part of gdk_surface_destroy(),
   *
   * surface: The window being destroyed
   * foreign_destroy: If TRUE, the surface or a parent was destroyed by some
   *     external agency. The surface has already been destroyed and no
   *     windowing system calls should be made. (This may never happen
   *     for some windowing systems.)
   */
  void         (* destroy)              (GdkSurface       *surface,
                                         gboolean         foreign_destroy);


  /* optional */
  gboolean     (* beep)                 (GdkSurface       *surface);

  void         (* destroy_notify)       (GdkSurface *surface);
  GdkDrag *    (* drag_begin)           (GdkSurface         *surface,
                                         GdkDevice          *device,
                                         GdkContentProvider *content,
                                         GdkDragAction       actions,
                                         double              dx,
                                         double              dy);

  int          (* get_scale_factor)       (GdkSurface      *surface);

  void         (* set_opaque_region)      (GdkSurface      *surface,
                                           cairo_region_t *region);
  void         (* request_layout)         (GdkSurface     *surface);
  gboolean     (* compute_size)           (GdkSurface     *surface);
};

#define GDK_SURFACE_DESTROYED(d) (((GdkSurface *)(d))->destroyed)

#define GDK_SURFACE_IS_MAPPED(surface) ((surface)->pending_is_mapped)

void gdk_surface_set_state (GdkSurface      *surface,
                            GdkToplevelState  new_state);

void gdk_surface_set_is_mapped (GdkSurface *surface,
                                gboolean    is_mapped);

GdkMonitor * gdk_surface_get_layout_monitor (GdkSurface      *surface,
                                             GdkPopupLayout  *layout,
                                             void           (*get_bounds) (GdkMonitor   *monitor,
                                                                           GdkRectangle *bounds));

void gdk_surface_layout_popup_helper (GdkSurface     *surface,
                                      int             width,
                                      int             height,
                                      int             shadow_left,
                                      int             shadow_right,
                                      int             shadow_top,
                                      int             shadow_bottom,
                                      GdkMonitor     *monitor,
                                      GdkRectangle   *bounds,
                                      GdkPopupLayout *layout,
                                      GdkRectangle   *out_final_rect);

static inline GdkGravity
gdk_gravity_flip_horizontally (GdkGravity anchor)
{
  switch (anchor)
    {
    default:
    case GDK_GRAVITY_STATIC:
    case GDK_GRAVITY_NORTH_WEST:
      return GDK_GRAVITY_NORTH_EAST;
    case GDK_GRAVITY_NORTH:
      return GDK_GRAVITY_NORTH;
    case GDK_GRAVITY_NORTH_EAST:
      return GDK_GRAVITY_NORTH_WEST;
    case GDK_GRAVITY_WEST:
      return GDK_GRAVITY_EAST;
    case GDK_GRAVITY_CENTER:
      return GDK_GRAVITY_CENTER;
    case GDK_GRAVITY_EAST:
      return GDK_GRAVITY_WEST;
    case GDK_GRAVITY_SOUTH_WEST:
      return GDK_GRAVITY_SOUTH_EAST;
    case GDK_GRAVITY_SOUTH:
      return GDK_GRAVITY_SOUTH;
    case GDK_GRAVITY_SOUTH_EAST:
      return GDK_GRAVITY_SOUTH_WEST;
    }

  g_assert_not_reached ();
}

static inline GdkGravity
gdk_gravity_flip_vertically (GdkGravity anchor)
{
  switch (anchor)
    {
    default:
    case GDK_GRAVITY_STATIC:
    case GDK_GRAVITY_NORTH_WEST:
      return GDK_GRAVITY_SOUTH_WEST;
    case GDK_GRAVITY_NORTH:
      return GDK_GRAVITY_SOUTH;
    case GDK_GRAVITY_NORTH_EAST:
      return GDK_GRAVITY_SOUTH_EAST;
    case GDK_GRAVITY_WEST:
      return GDK_GRAVITY_WEST;
    case GDK_GRAVITY_CENTER:
      return GDK_GRAVITY_CENTER;
    case GDK_GRAVITY_EAST:
      return GDK_GRAVITY_EAST;
    case GDK_GRAVITY_SOUTH_WEST:
      return GDK_GRAVITY_NORTH_WEST;
    case GDK_GRAVITY_SOUTH:
      return GDK_GRAVITY_NORTH;
    case GDK_GRAVITY_SOUTH_EAST:
      return GDK_GRAVITY_NORTH_EAST;
    }

  g_assert_not_reached ();
}

void       _gdk_surface_destroy           (GdkSurface      *surface,
                                           gboolean        foreign_destroy);
void       gdk_surface_invalidate_rect    (GdkSurface           *surface,
                                           const GdkRectangle   *rect);
void       gdk_surface_invalidate_region  (GdkSurface           *surface,
                                           const cairo_region_t *region);
void       _gdk_surface_clear_update_area (GdkSurface      *surface);
void       _gdk_surface_update_size       (GdkSurface      *surface);

GdkGLContext * gdk_surface_get_paint_gl_context (GdkSurface *surface,
                                                 GError   **error);

gboolean gdk_surface_handle_event (GdkEvent       *event);
GdkSeat * gdk_surface_get_seat_from_event (GdkSurface *surface,
                                           GdkEvent    *event);

void       gdk_surface_enter_monitor (GdkSurface *surface,
                                      GdkMonitor *monitor);
void       gdk_surface_leave_monitor (GdkSurface *surface,
                                      GdkMonitor *monitor);

void gdk_surface_destroy_notify       (GdkSurface *surface);

void gdk_synthesize_surface_state (GdkSurface     *surface,
                                   GdkToplevelState unset_flags,
                                   GdkToplevelState set_flags);

void gdk_surface_get_root_coords (GdkSurface *surface,
                                  int         x,
                                  int         y,
                                  int        *root_x,
                                  int        *root_y);
void gdk_surface_get_origin      (GdkSurface *surface,
                                  int        *x,
                                  int        *y);


void gdk_surface_get_geometry (GdkSurface *surface,
                               int        *x,
                               int        *y,
                               int        *width,
                               int        *height);

void                    gdk_surface_set_egl_native_window       (GdkSurface             *self,
                                                                 gpointer                native_window);
void                    gdk_surface_ensure_egl_surface          (GdkSurface             *self,
                                                                 gboolean                hdr);
gpointer /*EGLSurface*/ gdk_surface_get_egl_surface             (GdkSurface             *self);

void                    gdk_surface_set_widget                  (GdkSurface             *self,
                                                                 gpointer                widget);
gpointer                gdk_surface_get_widget                  (GdkSurface             *self);

void                    gdk_surface_freeze_updates              (GdkSurface             *surface);
void                    gdk_surface_thaw_updates                (GdkSurface             *surface);


typedef enum
{
  GDK_HINT_MIN_SIZE    = 1 << 1,
  GDK_HINT_MAX_SIZE    = 1 << 2,
} GdkSurfaceHints;

typedef struct _GdkGeometry GdkGeometry;

struct _GdkGeometry
{
  int min_width;
  int min_height;
  int max_width;
  int max_height;
};

void       gdk_surface_constrain_size      (GdkGeometry    *geometry,
                                            GdkSurfaceHints  flags,
                                            int             width,
                                            int             height,
                                            int            *new_width,
                                            int            *new_height);

void       gdk_surface_queue_state_change  (GdkSurface       *surface,
                                            GdkToplevelState  unset_flags,
                                            GdkToplevelState  set_flags);

void       gdk_surface_apply_state_change  (GdkSurface       *surface);

void       gdk_surface_emit_size_changed   (GdkSurface       *surface,
                                            int               width,
                                            int               height);

void       gdk_surface_request_compute_size (GdkSurface      *surface);

GDK_AVAILABLE_IN_ALL
void           gdk_surface_request_motion (GdkSurface *surface);


G_END_DECLS

#endif /* __GDK_SURFACE_PRIVATE_H__ */
