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gtk2/gdk/gdkwindowimpl.h
Benjamin Otte 8648d5409e dnd: Pass content to gdk_drag_begin() 
Instead of just passing the GdkContentFormats, we are now passing the
GdkContentProvider to gdk_drag_begin().
This means that GDK itself can now query the data from the provider
directly instead of having to send selection events.

Use this to provide the private API gdk_drag_context_write() that allows
backends to pass an output stream that this data will be written to.
Implement this as the mechanism for providing drag data on Wayland.

And to make this all work, implement a content provider named
GtkDragContent that is implemented by reverting to the old DND
drag-data-get machinery inside GTK, so for widgets everything works just
like before.
2017-12-13 15:05:27 +01:00

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/* GDK - The GIMP Drawing Kit
* 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/.
*/
#ifndef __GDK_WINDOW_IMPL_H__
#define __GDK_WINDOW_IMPL_H__
#include <gdk/gdkwindow.h>
#include <gdk/gdkproperty.h>
G_BEGIN_DECLS
#define GDK_TYPE_WINDOW_IMPL (gdk_window_impl_get_type ())
#define GDK_WINDOW_IMPL(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_WINDOW_IMPL, GdkWindowImpl))
#define GDK_WINDOW_IMPL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_WINDOW_IMPL, GdkWindowImplClass))
#define GDK_IS_WINDOW_IMPL(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_WINDOW_IMPL))
#define GDK_IS_WINDOW_IMPL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_WINDOW_IMPL))
#define GDK_WINDOW_IMPL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_WINDOW_IMPL, GdkWindowImplClass))
typedef struct _GdkWindowImpl GdkWindowImpl;
typedef struct _GdkWindowImplClass GdkWindowImplClass;
struct _GdkWindowImpl
{
GObject parent;
};
struct _GdkWindowImplClass
{
GObjectClass parent_class;
cairo_surface_t *
(* ref_cairo_surface) (GdkWindow *window);
cairo_surface_t *
(* create_similar_image_surface) (GdkWindow * window,
cairo_format_t format,
int width,
int height);
void (* show) (GdkWindow *window,
gboolean already_mapped);
void (* hide) (GdkWindow *window);
void (* withdraw) (GdkWindow *window);
void (* raise) (GdkWindow *window);
void (* lower) (GdkWindow *window);
void (* restack_toplevel) (GdkWindow *window,
GdkWindow *sibling,
gboolean above);
void (* move_resize) (GdkWindow *window,
gboolean with_move,
gint x,
gint y,
gint width,
gint height);
void (* move_to_rect) (GdkWindow *window,
const GdkRectangle *rect,
GdkGravity rect_anchor,
GdkGravity window_anchor,
GdkAnchorHints anchor_hints,
gint rect_anchor_dx,
gint rect_anchor_dy);
GdkEventMask (* get_events) (GdkWindow *window);
void (* set_events) (GdkWindow *window,
GdkEventMask event_mask);
void (* get_geometry) (GdkWindow *window,
gint *x,
gint *y,
gint *width,
gint *height);
void (* get_root_coords) (GdkWindow *window,
gint x,
gint y,
gint *root_x,
gint *root_y);
gboolean (* get_device_state) (GdkWindow *window,
GdkDevice *device,
gdouble *x,
gdouble *y,
GdkModifierType *mask);
gboolean (* begin_paint) (GdkWindow *window);
void (* end_paint) (GdkWindow *window);
void (* shape_combine_region) (GdkWindow *window,
const cairo_region_t *shape_region,
gint offset_x,
gint offset_y);
void (* input_shape_combine_region) (GdkWindow *window,
const cairo_region_t *shape_region,
gint offset_x,
gint offset_y);
/* Called before processing updates for a window. This gives the windowing
* layer a chance to save the region for later use in avoiding duplicate
* exposes.
*/
void (* queue_antiexpose) (GdkWindow *window,
cairo_region_t *update_area);
/* Called to do the windowing system specific part of gdk_window_destroy(),
*
* window: The window being destroyed
* recursing: If TRUE, then this is being called because a parent
* was destroyed. This generally means that the call to the windowing
* system to destroy the window can be omitted, since it will be
* destroyed as a result of the parent being destroyed.
* Unless @foreign_destroy
* foreign_destroy: If TRUE, the window or a parent was destroyed by some
* external agency. The window has already been destroyed and no
* windowing system calls should be made. (This may never happen
* for some windowing systems.)
*/
void (* destroy) (GdkWindow *window,
gboolean recursing,
gboolean foreign_destroy);
/* optional */
gboolean (* beep) (GdkWindow *window);
void (* focus) (GdkWindow *window,
guint32 timestamp);
void (* set_type_hint) (GdkWindow *window,
GdkWindowTypeHint hint);
GdkWindowTypeHint (* get_type_hint) (GdkWindow *window);
void (* set_modal_hint) (GdkWindow *window,
gboolean modal);
void (* set_skip_taskbar_hint) (GdkWindow *window,
gboolean skips_taskbar);
void (* set_skip_pager_hint) (GdkWindow *window,
gboolean skips_pager);
void (* set_urgency_hint) (GdkWindow *window,
gboolean urgent);
void (* set_geometry_hints) (GdkWindow *window,
const GdkGeometry *geometry,
GdkWindowHints geom_mask);
void (* set_title) (GdkWindow *window,
const gchar *title);
void (* set_role) (GdkWindow *window,
const gchar *role);
void (* set_startup_id) (GdkWindow *window,
const gchar *startup_id);
void (* set_transient_for) (GdkWindow *window,
GdkWindow *parent);
void (* get_frame_extents) (GdkWindow *window,
GdkRectangle *rect);
void (* set_accept_focus) (GdkWindow *window,
gboolean accept_focus);
void (* set_focus_on_map) (GdkWindow *window,
gboolean focus_on_map);
void (* set_icon_list) (GdkWindow *window,
GList *pixbufs);
void (* set_icon_name) (GdkWindow *window,
const gchar *name);
void (* iconify) (GdkWindow *window);
void (* deiconify) (GdkWindow *window);
void (* stick) (GdkWindow *window);
void (* unstick) (GdkWindow *window);
void (* maximize) (GdkWindow *window);
void (* unmaximize) (GdkWindow *window);
void (* fullscreen) (GdkWindow *window);
void (* fullscreen_on_monitor) (GdkWindow *window,
GdkMonitor *monitor);
void (* apply_fullscreen_mode) (GdkWindow *window);
void (* unfullscreen) (GdkWindow *window);
void (* set_keep_above) (GdkWindow *window,
gboolean setting);
void (* set_keep_below) (GdkWindow *window,
gboolean setting);
GdkWindow * (* get_group) (GdkWindow *window);
void (* set_group) (GdkWindow *window,
GdkWindow *leader);
void (* set_decorations) (GdkWindow *window,
GdkWMDecoration decorations);
gboolean (* get_decorations) (GdkWindow *window,
GdkWMDecoration *decorations);
void (* set_functions) (GdkWindow *window,
GdkWMFunction functions);
void (* begin_resize_drag) (GdkWindow *window,
GdkWindowEdge edge,
GdkDevice *device,
gint button,
gint root_x,
gint root_y,
guint32 timestamp);
void (* begin_move_drag) (GdkWindow *window,
GdkDevice *device,
gint button,
gint root_x,
gint root_y,
guint32 timestamp);
void (* enable_synchronized_configure) (GdkWindow *window);
void (* configure_finished) (GdkWindow *window);
void (* set_opacity) (GdkWindow *window,
gdouble opacity);
void (* destroy_notify) (GdkWindow *window);
void (* register_dnd) (GdkWindow *window);
GdkDragContext * (*drag_begin) (GdkWindow *window,
GdkDevice *device,
GdkContentProvider*content,
GdkDragAction actions,
gint dx,
gint dy);
void (*process_updates_recurse) (GdkWindow *window,
cairo_region_t *region);
gboolean (*get_property) (GdkWindow *window,
GdkAtom property,
GdkAtom type,
gulong offset,
gulong length,
gint pdelete,
GdkAtom *actual_type,
gint *actual_format,
gint *actual_length,
guchar **data);
void (*change_property) (GdkWindow *window,
GdkAtom property,
GdkAtom type,
gint format,
GdkPropMode mode,
const guchar *data,
gint n_elements);
void (*delete_property) (GdkWindow *window,
GdkAtom property);
gint (* get_scale_factor) (GdkWindow *window);
void (* get_unscaled_size) (GdkWindow *window,
int *unscaled_width,
int *unscaled_height);
void (* set_opaque_region) (GdkWindow *window,
cairo_region_t *region);
void (* set_shadow_width) (GdkWindow *window,
gint left,
gint right,
gint top,
gint bottom);
gboolean (* show_window_menu) (GdkWindow *window,
GdkEvent *event);
GdkGLContext *(*create_gl_context) (GdkWindow *window,
gboolean attached,
GdkGLContext *share,
GError **error);
gboolean (* supports_edge_constraints)(GdkWindow *window);
};
/* Interface Functions */
GType gdk_window_impl_get_type (void) G_GNUC_CONST;
G_END_DECLS
#endif /* __GDK_WINDOW_IMPL_H__ */
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