/*
 *      fm-dnd-dest.h
 *
 *      Copyright 2009 PCMan <pcman.tw@gmail.com>
 *
 *      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.
 *
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *      MA 02110-1301, USA.
 */


#ifndef __FM_DND_DEST_H__
#define __FM_DND_DEST_H__

#include <gtk/gtk.h>
#include "fm-file-info.h"

G_BEGIN_DECLS

#define FM_TYPE_DND_DEST                (fm_dnd_dest_get_type())
#define FM_DND_DEST(obj)                (G_TYPE_CHECK_INSTANCE_CAST((obj),\
            FM_TYPE_DND_DEST, FmDndDest))
#define FM_DND_DEST_CLASS(klass)        (G_TYPE_CHECK_CLASS_CAST((klass),\
            FM_TYPE_DND_DEST, FmDndDestClass))
#define FM_IS_DND_DEST(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),\
            FM_TYPE_DND_DEST))
#define FM_IS_DND_DEST_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),\
            FM_TYPE_DND_DEST))

/**
 * FmDndDestTargetType
 * @FM_DND_DEST_TARGET_FM_LIST: direct pointer of #FmList
 * @FM_DND_DEST_TARGET_URI_LIST: "text/uri-list"
 * @FM_DND_DEST_TARGET_XDS: X direct save
 * @N_FM_DND_DEST_DEFAULT_TARGETS: widget's target indices should start from this
 *
 * default droppable targets supported by #FmDndDest
 */
typedef enum
{
    FM_DND_DEST_TARGET_FM_LIST = 1,
    FM_DND_DEST_TARGET_URI_LIST,
    FM_DND_DEST_TARGET_XDS,
    /*< private >*/
    FM_DND_DEST_RESERVED1,
    FM_DND_DEST_RESERVED2,
    FM_DND_DEST_RESERVED3,
    FM_DND_DEST_RESERVED4,
    FM_DND_DEST_RESERVED5,
    /*< public >*/
    N_FM_DND_DEST_DEFAULT_TARGETS
} FmDndDestTargetType;

typedef struct _FmDndDest           FmDndDest;
typedef struct _FmDndDestClass      FmDndDestClass;

/**
 * FmDndDestClass
 * @parent_class: the parent class
 * @files_dropped: the class closure for the #FmDndDest::files-dropped signal
 */
struct _FmDndDestClass
{
    GObjectClass parent_class;
    gboolean (*files_dropped)(FmDndDest* dd, int x, int y, guint action, guint info_type, FmPathList* files);
};

GType       fm_dnd_dest_get_type        (void);
FmDndDest*  fm_dnd_dest_new         (GtkWidget* w);
FmDndDest*  fm_dnd_dest_new_with_handlers (GtkWidget* w);

void fm_dnd_dest_set_widget(FmDndDest* dd, GtkWidget* w);

void fm_dnd_dest_set_dest_file(FmDndDest* dd, FmFileInfo* dest_file);
FmFileInfo* fm_dnd_dest_get_dest_file(FmDndDest* dd);
FmPath* fm_dnd_dest_get_dest_path(FmDndDest* dd);

#if !GTK_CHECK_VERSION(2, 22, 0)
#  define gdk_drag_context_list_targets(ctx) ctx->targets
#endif

#define fm_drag_context_has_target(ctx, target) \
    (g_list_find(gdk_drag_context_list_targets(ctx), target) != NULL)

#define fm_drag_context_has_target_name(ctx, name)  \
    fm_drag_context_has_target(ctx, gdk_atom_intern_static_string(name))

gboolean fm_dnd_dest_drag_data_received(FmDndDest* dd, GdkDragContext *drag_context,
             gint x, gint y, GtkSelectionData *sel_data, guint info, guint time);

gboolean fm_dnd_dest_is_target_supported(FmDndDest* dd, GdkAtom target);

GdkAtom fm_dnd_dest_find_target(FmDndDest* dd, GdkDragContext *drag_context);

gboolean fm_dnd_dest_drag_drop(FmDndDest* dd, GdkDragContext *drag_context,
                               GdkAtom target, int x, int y, guint time);

GdkDragAction fm_dnd_dest_get_default_action(FmDndDest* dd,
                                             GdkDragContext* drag_context,
                                             GdkAtom target);

void fm_dnd_dest_drag_leave(FmDndDest* dd, GdkDragContext* drag_context, guint time);

/**
 * fm_dnd_dest_add_targets
 * @widget: #GtkWidget to add targets
 * @targets: pointer to array of #GtkTargetEntry to add
 * @n: number of targets to add
 *
 * Adds drop destination targets to existing list for @widget. Convenience API.
 *
 * Since: 1.0.1
 */
#define fm_dnd_dest_add_targets(widget,targets,n) \
            gtk_target_list_add_table(gtk_drag_dest_get_target_list(widget), \
                                      targets, n)

G_END_DECLS

#endif /* __FM_DND_DEST_H__ */