/* GTK - The GIMP Toolkit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * 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/>.
 */

/*
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
 */

#pragma once

#include "gtkwidget.h"

#include "gtkactionmuxerprivate.h"
#include "gtkatcontextprivate.h"
#include "gtkborder.h"
#include "gtkcsstypesprivate.h"
#include "gtkeventcontrollerprivate.h"
#include "gtklistlistmodelprivate.h"
#include "gtkrootprivate.h"
#include "gtksizerequestcacheprivate.h"
#include "gtkwindowprivate.h"
#include "gtkgesture.h"

#include "gsk/gskrendernodeprivate.h"

G_BEGIN_DECLS

typedef gboolean (*GtkSurfaceTransformChangedCallback) (GtkWidget               *widget,
                                                        const graphene_matrix_t *surface_transform,
                                                        gpointer                 user_data);

#define GTK_STATE_FLAGS_BITS 15

typedef struct _GtkWidgetSurfaceTransformData
{
  GtkWidget *tracked_parent;
  guint parent_surface_transform_changed_id;

  gboolean cached_surface_transform_valid;

  graphene_matrix_t cached_surface_transform;
  GList *callbacks;
} GtkWidgetSurfaceTransformData;

struct _GtkWidgetPrivate
{
  /* The state of the widget. Needs to be able to hold all GtkStateFlags bits
   * (defined in "gtkenums.h").
   */
  guint state_flags : GTK_STATE_FLAGS_BITS;

  guint direction             : 2;

  guint in_destruction        : 1;
  guint realized              : 1;
  guint mapped                : 1;
  guint visible               : 1;
  guint sensitive             : 1;
  guint can_focus             : 1;
  guint focusable             : 1;
  guint has_focus             : 1;
  guint focus_on_click        : 1;
  guint has_default           : 1;
  guint receives_default      : 1;
  guint has_grab              : 1;
  guint child_visible         : 1;
  guint can_target            : 1;
  guint limit_events          : 1;

  /* Queue-resize related flags */
  guint resize_queued         : 1; /* queue_resize() has been called but no get_preferred_size() yet */
  guint alloc_needed          : 1; /* this widget needs a size_allocate() call */
  guint alloc_needed_on_child : 1; /* 0 or more children - or this widget - need a size_allocate() call */

  /* Queue-draw related flags */
  guint draw_needed           : 1;
  /* Expand-related flags */
  guint need_compute_expand   : 1; /* Need to recompute computed_[hv]_expand */
  guint computed_hexpand      : 1; /* computed results (composite of child flags) */
  guint computed_vexpand      : 1;
  guint hexpand               : 1; /* application-forced expand */
  guint vexpand               : 1;
  guint hexpand_set           : 1; /* whether to use application-forced  */
  guint vexpand_set           : 1; /* instead of computing from children */
  guint has_tooltip           : 1;

  /* SizeGroup related flags */
  guint have_size_groups      : 1;

  /* Alignment */
  guint   halign              : 4;
  guint   valign              : 4;

  guint user_alpha            : 8;

  GtkOverflow overflow;

#ifdef G_ENABLE_CONSISTENCY_CHECKS
  /* Number of gtk_widget_push_verify_invariants () */
  guint8 verifying_invariants_count;
#endif

  int width_request;
  int height_request;

  /* Animations and other things to update on clock ticks */
  gulong clock_tick_id;
  guint8 n_active;
  GList *tick_callbacks;

  void (* resize_func) (GtkWidget *);
  GtkBorder margin;

  /* Surface relative transform updates callbacks */
  GtkWidgetSurfaceTransformData *surface_transform_data;

  /* The widget's name. If the widget does not have a name
   * (the name is NULL), then its name (as returned by
   * "gtk_widget_get_name") is its class's name.
   * Among other things, the widget name is used to determine
   * the style to use for a widget.
   */
  char *name;

  /* The root this widget belongs to or %NULL if widget is not
   * rooted or is a GtkRoot itself.
   */
  GtkRoot *root;

  /* The style for the widget. The style contains the
   * colors the widget should be drawn in for each state
   * along with graphics contexts used to draw with and
   * the font to use for text.
   */
  GtkCssNode *cssnode;
  GtkStyleContext *context;

  /* The widget's allocated size */
  GskTransform *allocated_transform;
  int allocated_width;
  int allocated_height;
  int allocated_baseline;

  int width;
  int height;
  int baseline;
  GskTransform *transform;

  /* The widget's requested sizes */
  SizeRequestCache requests;

  /* The render node we draw or %NULL if not yet created.*/
  GskRenderNode *render_node;

  /* The layout manager, or %NULL */
  GtkLayoutManager *layout_manager;

  GSList *paintables;

  GList *event_controllers;

  /* Widget tree */
  GtkWidget *parent;
  GtkWidget *prev_sibling;
  GtkWidget *next_sibling;
  GtkWidget *first_child;
  GtkWidget *last_child;

  /* only created on-demand */
  GtkListListModel *children_observer;
  GtkListListModel *controller_observer;
  GtkActionMuxer *muxer;

  GtkWidget *focus_child;

  /* Pointer cursor */
  GdkCursor *cursor;

  /* Tooltip */
  char *tooltip_markup;
  char *tooltip_text;

  /* Accessibility */
  GtkATContext *at_context;
  GtkAccessibleRole accessible_role;
};

typedef struct
{
  GBytes *data;
  GSList *children;
  GtkBuilderScope *scope;
} GtkWidgetTemplate;

struct _GtkWidgetClassPrivate
{
  GtkWidgetTemplate *template;
  GListStore *shortcuts;
  GType layout_manager_type;
  GtkWidgetAction *actions;
  GtkAccessibleRole accessible_role;
  guint activate_signal;
  GQuark css_name;
};

void          gtk_widget_root               (GtkWidget *widget);
void          gtk_widget_unroot             (GtkWidget *widget);
GtkCssNode *  gtk_widget_get_css_node       (GtkWidget *widget);
void         _gtk_widget_set_visible_flag   (GtkWidget *widget,
                                             gboolean   visible);
gboolean     _gtk_widget_get_alloc_needed   (GtkWidget *widget);
gboolean     gtk_widget_needs_allocate      (GtkWidget *widget);
void         gtk_widget_clear_resize_queued (GtkWidget *widget);
void         gtk_widget_ensure_allocate     (GtkWidget *widget);
void          _gtk_widget_scale_changed     (GtkWidget *widget);
void         gtk_widget_monitor_changed     (GtkWidget *widget);

GdkSurface * gtk_widget_get_surface         (GtkWidget *widget);

void         _gtk_widget_add_sizegroup         (GtkWidget    *widget,
      gpointer      group);
void         _gtk_widget_remove_sizegroup      (GtkWidget    *widget,
      gpointer      group);
GSList      *_gtk_widget_get_sizegroups        (GtkWidget    *widget);

void              gtk_widget_set_has_default               (GtkWidget *widget,
                                                            gboolean   has_default);
void              _gtk_widget_set_has_grab                 (GtkWidget *widget,
                                                            gboolean   has_grab);

gboolean          gtk_widget_has_grab                      (GtkWidget *widget);

void              _gtk_widget_synthesize_crossing          (GtkWidget       *from,
                                                            GtkWidget       *to,
                                                            GdkDevice       *device,
                                                            GdkCrossingMode  mode);

GtkStyleContext * _gtk_widget_peek_style_context           (GtkWidget *widget);

gboolean          _gtk_widget_captured_event               (GtkWidget *widget,
                                                            GdkEvent  *event,
                                                            GtkWidget *target);

void              gtk_widget_css_changed                   (GtkWidget           *widget,
                                                            GtkCssStyleChange   *change);
void              gtk_widget_system_setting_changed        (GtkWidget           *widget,
                                                            GtkSystemSetting     setting);
void              gtk_system_setting_changed               (GdkDisplay          *display,
                                                            GtkSystemSetting     setting);

void              _gtk_widget_update_parent_muxer          (GtkWidget    *widget);
GtkActionMuxer *  _gtk_widget_get_action_muxer             (GtkWidget    *widget,
                                                            gboolean      create);

gboolean          gtk_widget_has_tick_callback             (GtkWidget *widget);

gboolean          gtk_widget_has_size_request              (GtkWidget *widget);

void              gtk_widget_reset_controllers             (GtkWidget *widget);

GtkEventController **gtk_widget_list_controllers           (GtkWidget           *widget,
                                                            GtkPropagationPhase  phase,
                                                            guint               *out_n_controllers);

gboolean          gtk_widget_query_tooltip                 (GtkWidget  *widget,
                                                            int         x,
                                                            int         y,
                                                            gboolean    keyboard_mode,
                                                            GtkTooltip *tooltip);

void              gtk_widget_snapshot                      (GtkWidget            *widget,
                                                            GtkSnapshot          *snapshot);
void              gtk_widget_adjust_size_request           (GtkWidget      *widget,
                                                            GtkOrientation  orientation,
                                                            int            *minimum_size,
                                                            int            *natural_size);
void              gtk_widget_adjust_baseline_request       (GtkWidget *widget,
                                                            int       *minimum_baseline,
                                                            int       *natural_baseline);

typedef void    (*GtkCallback)     (GtkWidget        *widget,
                                    gpointer          data);

void              gtk_widget_forall                        (GtkWidget            *widget,
                                                            GtkCallback           callback,
                                                            gpointer              user_data);

void              gtk_widget_focus_sort                    (GtkWidget        *widget,
                                                            GtkDirectionType  direction,
                                                            GPtrArray        *focus_order);
gboolean          gtk_widget_focus_move                    (GtkWidget        *widget,
                                                            GtkDirectionType  direction);
void              gtk_widget_set_has_focus                 (GtkWidget        *widget,
                                                            gboolean          has_focus);

GtkWidget *       gtk_widget_common_ancestor               (GtkWidget *widget_a,
                                                            GtkWidget *widget_b);

void              gtk_widget_set_active_state              (GtkWidget *widget,
                                                            gboolean   active);

void              gtk_widget_propagate_event_sequence_state (GtkWidget             *widget,
                                                             GtkGesture            *gesture,
                                                             GdkEventSequence      *sequence,
                                                             GtkEventSequenceState  state);
gboolean          gtk_widget_event                         (GtkWidget           *widget,
                                                            GdkEvent            *event,
                                                            GtkWidget           *target);
gboolean          gtk_widget_run_controllers               (GtkWidget           *widget,
                                                            GdkEvent            *event,
                                                            GtkWidget           *target,
                                                            double               x,
                                                            double               y,
                                                            GtkPropagationPhase  phase);
void              gtk_widget_handle_crossing               (GtkWidget             *widget,
                                                            const GtkCrossingData *crossing,
                                                            double                 x,
                                                            double                 y);


guint             gtk_widget_add_surface_transform_changed_callback (GtkWidget                          *widget,
                                                                     GtkSurfaceTransformChangedCallback  callback,
                                                                     gpointer                            user_data,
                                                                     GDestroyNotify                      notify);

void              gtk_widget_remove_surface_transform_changed_callback (GtkWidget *widget,
                                                                        guint      id);

gboolean          gtk_widget_can_activate       (GtkWidget *widget);

/* focus vfuncs for non-focusable containers with focusable children */
gboolean gtk_widget_grab_focus_child (GtkWidget        *widget);
gboolean gtk_widget_focus_child      (GtkWidget        *widget,
                                      GtkDirectionType  direction);
/* focus vfuncs for focusable widgets with children that don't receive focus */
gboolean gtk_widget_grab_focus_self  (GtkWidget        *widget);
gboolean gtk_widget_focus_self       (GtkWidget        *widget,
                                      GtkDirectionType  direction);

void    gtk_widget_update_orientation   (GtkWidget      *widget,
                                         GtkOrientation  orientation);

void    gtk_widget_realize_at_context   (GtkWidget *widget);
void    gtk_widget_unrealize_at_context (GtkWidget *widget);

gboolean gtk_widget_update_pango_context (GtkWidget        *widget,
                                          PangoContext     *context,
                                          GtkTextDirection  direction);

/* inline getters */

static inline GtkWidget *
_gtk_widget_get_parent (GtkWidget *widget)
{
  return widget->priv->parent;
}

static inline GtkWidget *
_gtk_widget_get_focus_child (GtkWidget *widget)
{
  return widget->priv->focus_child;
}

static inline gboolean
_gtk_widget_get_visible (GtkWidget *widget)
{
  return widget->priv->visible;
}

static inline gboolean
_gtk_widget_get_child_visible (GtkWidget *widget)
{
  return widget->priv->child_visible;
}

static inline gboolean
_gtk_widget_get_mapped (GtkWidget *widget)
{
  return widget->priv->mapped;
}

static inline gboolean
_gtk_widget_get_realized (GtkWidget *widget)
{
  return widget->priv->realized;
}

static inline GtkStateFlags
_gtk_widget_get_state_flags (GtkWidget *widget)
{
  return widget->priv->state_flags;
}

extern GtkTextDirection gtk_default_direction;

static inline GtkTextDirection
_gtk_widget_get_direction (GtkWidget *widget)
{
  if (widget->priv->direction == GTK_TEXT_DIR_NONE)
    return gtk_default_direction;
  else
    return widget->priv->direction;
}

static inline GtkRoot *
_gtk_widget_get_root (GtkWidget *widget)
{
  return widget->priv->root;
}

static inline GdkDisplay *
_gtk_widget_get_display (GtkWidget *widget)
{
  GtkRoot *root = _gtk_widget_get_root (widget);

  if (root == NULL)
    return gdk_display_get_default ();

  return gtk_root_get_display (root);
}

static inline gpointer
_gtk_widget_peek_request_cache (GtkWidget *widget)
{
  return &widget->priv->requests;
}

static inline GtkWidget *
_gtk_widget_get_prev_sibling (GtkWidget *widget)
{
  return widget->priv->prev_sibling;
}

static inline GtkWidget *
_gtk_widget_get_next_sibling (GtkWidget *widget)
{
  return widget->priv->next_sibling;
}

static inline GtkWidget *
_gtk_widget_get_first_child (GtkWidget *widget)
{
  return widget->priv->first_child;
}

static inline GtkWidget *
_gtk_widget_get_last_child (GtkWidget *widget)
{
  return widget->priv->last_child;
}

static inline gboolean
_gtk_widget_is_sensitive (GtkWidget *widget)
{
  return !(widget->priv->state_flags & GTK_STATE_FLAG_INSENSITIVE);
}

void gtk_widget_set_accessible_role (GtkWidget        *self,
                                     GtkAccessibleRole role);

G_END_DECLS