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8648d5409e
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.
196 lines
8.9 KiB
C
196 lines
8.9 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 2010, Red Hat, Inc
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GDK_DND_PRIVATE_H__
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#define __GDK_DND_PRIVATE_H__
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#include "gdkdnd.h"
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G_BEGIN_DECLS
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/*
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* GdkDragProtocol:
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* @GDK_DRAG_PROTO_NONE: no protocol.
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* @GDK_DRAG_PROTO_MOTIF: The Motif DND protocol. No longer supported
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* @GDK_DRAG_PROTO_XDND: The Xdnd protocol.
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* @GDK_DRAG_PROTO_ROOTWIN: An extension to the Xdnd protocol for
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* unclaimed root window drops.
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* @GDK_DRAG_PROTO_WIN32_DROPFILES: The simple WM_DROPFILES protocol.
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* @GDK_DRAG_PROTO_OLE2: The complex OLE2 DND protocol (not implemented).
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* @GDK_DRAG_PROTO_LOCAL: Intra-application DND.
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* @GDK_DRAG_PROTO_WAYLAND: Wayland DND protocol.
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*
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* Used in #GdkDragContext to indicate the protocol according to
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* which DND is done.
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*/
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typedef enum
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{
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GDK_DRAG_PROTO_NONE = 0,
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GDK_DRAG_PROTO_MOTIF,
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GDK_DRAG_PROTO_XDND,
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GDK_DRAG_PROTO_ROOTWIN,
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GDK_DRAG_PROTO_WIN32_DROPFILES,
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GDK_DRAG_PROTO_OLE2,
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GDK_DRAG_PROTO_LOCAL,
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GDK_DRAG_PROTO_WAYLAND
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} GdkDragProtocol;
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#define GDK_DRAG_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_DRAG_CONTEXT, GdkDragContextClass))
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#define GDK_IS_DRAG_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_DRAG_CONTEXT))
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#define GDK_DRAG_CONTEXT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_DRAG_CONTEXT, GdkDragContextClass))
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typedef struct _GdkDragContextClass GdkDragContextClass;
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struct _GdkDragContextClass {
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GObjectClass parent_class;
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GdkWindow * (*find_window) (GdkDragContext *context,
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GdkWindow *drag_window,
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gint x_root,
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gint y_root,
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GdkDragProtocol *protocol);
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GdkAtom (*get_selection) (GdkDragContext *context);
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gboolean (*drag_motion) (GdkDragContext *context,
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GdkWindow *dest_window,
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GdkDragProtocol protocol,
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gint root_x,
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gint root_y,
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GdkDragAction suggested_action,
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GdkDragAction possible_actions,
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guint32 time_);
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void (*drag_status) (GdkDragContext *context,
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GdkDragAction action,
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guint32 time_);
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void (*drag_abort) (GdkDragContext *context,
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guint32 time_);
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void (*drag_drop) (GdkDragContext *context,
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guint32 time_);
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void (*drop_reply) (GdkDragContext *context,
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gboolean accept,
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guint32 time_);
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void (*drop_finish) (GdkDragContext *context,
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gboolean success,
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guint32 time_);
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void (* read_async) (GdkDragContext *context,
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GdkContentFormats *formats,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GInputStream * (* read_finish) (GdkDragContext *context,
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const char **out_mime_type,
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GAsyncResult *result,
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GError **error);
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gboolean (*drop_status) (GdkDragContext *context);
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GdkWindow* (*get_drag_window) (GdkDragContext *context);
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void (*set_hotspot) (GdkDragContext *context,
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gint hot_x,
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gint hot_y);
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void (*drop_done) (GdkDragContext *context,
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gboolean success);
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void (*set_cursor) (GdkDragContext *context,
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GdkCursor *cursor);
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void (*cancel) (GdkDragContext *context,
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GdkDragCancelReason reason);
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void (*drop_performed) (GdkDragContext *context,
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guint32 time);
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void (*dnd_finished) (GdkDragContext *context);
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gboolean (*handle_event) (GdkDragContext *context,
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const GdkEvent *event);
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void (*action_changed) (GdkDragContext *context,
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GdkDragAction action);
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void (*commit_drag_status) (GdkDragContext *context);
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};
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struct _GdkDragContext {
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GObject parent_instance;
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/*< private >*/
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GdkDragProtocol protocol;
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GdkDisplay *display;
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gboolean is_source;
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GdkWindow *source_window;
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GdkWindow *dest_window;
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GdkWindow *drag_window;
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GdkContentProvider *content;
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GdkContentFormats *formats;
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GdkDragAction actions;
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GdkDragAction suggested_action;
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GdkDragAction action;
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guint32 start_time;
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GdkDevice *device;
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guint drop_done : 1; /* Whether gdk_drag_drop_done() was performed */
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};
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void gdk_drag_context_set_device (GdkDragContext *context,
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GdkDevice *device);
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void gdk_drag_context_set_cursor (GdkDragContext *context,
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GdkCursor *cursor);
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void gdk_drag_context_cancel (GdkDragContext *context,
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GdkDragCancelReason reason);
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gboolean gdk_drag_context_handle_source_event (GdkEvent *event);
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gboolean gdk_drag_context_handle_dest_event (GdkEvent *event);
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GdkCursor * gdk_drag_get_cursor (GdkDragContext *context,
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GdkDragAction action);
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gboolean gdk_drag_motion (GdkDragContext *context,
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GdkWindow *dest_window,
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GdkDragProtocol protocol,
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gint x_root,
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gint y_root,
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GdkDragAction suggested_action,
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GdkDragAction possible_actions,
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guint32 time_);
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void gdk_drag_abort (GdkDragContext *context,
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guint32 time_);
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void gdk_drag_drop (GdkDragContext *context,
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guint32 time_);
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void gdk_drag_find_window (GdkDragContext *context,
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GdkWindow *drag_window,
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gint x_root,
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gint y_root,
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GdkWindow **dest_window,
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GdkDragProtocol *protocol);
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void gdk_drag_context_write_async (GdkDragContext *context,
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const char *mime_type,
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GOutputStream *stream,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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gboolean gdk_drag_context_write_finish (GdkDragContext *context,
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GAsyncResult *result,
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GError **error);
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G_END_DECLS
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#endif
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