/* Given a drop path retrieved by gtk_tree_view_get_dest_row_at_pos, this function
* determines whether dropping a bookmark item at the specified path is allow.
* If dropping is not allowed, this function tries to choose an alternative position
* for the bookmark item and modified the tree path @tp passed into this function. */
static gboolean get_bookmark_drag_dest(FmPlacesView* view, GtkTreePath** tp, GtkTreeViewDropPosition* pos)
{
gboolean ret = TRUE;
if(*tp)
{
/* if the drop site is below the separator (in the bookmark area) */
if(fm_places_model_path_is_bookmark(FM_PLACES_MODEL(model), *tp))
{
/* we cannot drop into a item */
if(*pos == GTK_TREE_VIEW_DROP_INTO_OR_BEFORE ||
*pos == GTK_TREE_VIEW_DROP_INTO_OR_AFTER)
ret = FALSE;
else
ret = TRUE;
}
else /* the drop site is above the separator (in the places area containing volumes) */
{
const GtkTreePath* sep = fm_places_model_get_separator_path(FM_PLACES_MODEL(model));
/* set drop site at the first bookmark item */
gtk_tree_path_get_indices(*tp)[0] = gtk_tree_path_get_indices(sep)[0] + 1;
*pos = GTK_TREE_VIEW_DROP_BEFORE;
ret = TRUE;
}
}
else
{
/* drop at end of the bookmarks list instead */
*tp = gtk_tree_path_new_from_indices(gtk_tree_model_iter_n_children(GTK_TREE_MODEL(model), NULL) - 1, -1);
*pos = GTK_TREE_VIEW_DROP_AFTER;
ret = TRUE;
}
g_debug("path: %s", gtk_tree_path_to_string(*tp));
return ret;
}
static gboolean row_draggable(GtkTreeDragSource* drag_source, GtkTreePath* tp)
{
FmPlacesModel* model = FM_PLACES_MODEL(drag_source);
return fm_places_model_path_is_bookmark(model, tp);
}
static void on_drag_data_received ( GtkWidget *dest_widget,
GdkDragContext *drag_context, gint x, gint y,
GtkSelectionData *sel_data, guint info, guint time)
{
FmPlacesView* view = FM_PLACES_VIEW(dest_widget);
GtkTreePath* dest_tp = NULL;
GtkTreeViewDropPosition pos;
gtk_tree_view_get_dest_row_at_pos(GTK_TREE_VIEW(view), x, y, &dest_tp, &pos);
switch(info)
{
case FM_DND_DEST_TARGET_BOOOKMARK:
if(get_bookmark_drag_dest(view, &dest_tp, &pos)) /* got the drop position */
{
GtkTreePath* src_tp;
/* get the source row */
gboolean ret = gtk_tree_get_row_drag_data(sel_data, NULL, &src_tp);
if(ret)
{
/* don't do anything if source and dest are the same row */
if(G_UNLIKELY(gtk_tree_path_compare(src_tp, dest_tp) == 0))
ret = FALSE;
else
{
/* don't do anything if this is not a bookmark item */
if(!fm_places_model_path_is_bookmark(FM_PLACES_MODEL(model), src_tp))
ret = FALSE;
}
if(ret)
{
GtkTreeIter src_it, dest_it;
FmPlaceItem* item = NULL;
ret = FALSE;
/* get the source bookmark item */
if(gtk_tree_model_get_iter(GTK_TREE_MODEL(model), &src_it, src_tp))
gtk_tree_model_get(GTK_TREE_MODEL(model), &src_it, FM_PLACES_MODEL_COL_INFO, &item, -1);
if(item)
{
/* move it to destination position */
if(gtk_tree_model_get_iter(GTK_TREE_MODEL(model), &dest_it, dest_tp))
{
int new_pos, sep_pos;
/* get index of the separator */
const GtkTreePath* sep_tp = fm_places_model_get_separator_path(FM_PLACES_MODEL(model));
sep_pos = gtk_tree_path_get_indices(sep_tp)[0];
if(pos == GTK_TREE_VIEW_DROP_BEFORE)
gtk_list_store_move_before(model, &src_it, &dest_it);
else
gtk_list_store_move_after(model, &src_it, &dest_it);
new_pos = gtk_tree_path_get_indices(dest_tp)[0] - sep_pos - 1;
/* reorder the bookmark item */
fm_bookmarks_reorder(FM_PLACES_MODEL(model)->bookmarks, item->bm_item, new_pos);
ret = TRUE;
}
}
}
gtk_tree_path_free(src_tp);
}
gtk_drag_finish(drag_context, ret, FALSE, time);
}
break;
default:
/* check if files are received. */
fm_dnd_dest_drag_data_received(view->dnd_dest, drag_context, x, y, sel_data, info, time);
break;
}
if(dest_tp)
gtk_tree_path_free(dest_tp);
}
static gboolean on_drag_motion (GtkWidget *dest_widget,
GdkDragContext *drag_context, gint x, gint y, guint time)
{
FmPlacesView* view = FM_PLACES_VIEW(dest_widget);
/* fm_drag_context_has_target_name(drag_context, "GTK_TREE_MODEL_ROW"); */
GdkAtom target;
GtkTreeViewDropPosition pos;
GtkTreePath* tp, *sep;
gboolean ret = FALSE;
GdkDragAction action = 0;
target = gtk_drag_dest_find_target(dest_widget, drag_context, NULL);
if(target == GDK_NONE)
return FALSE;
gtk_tree_view_get_dest_row_at_pos((GtkTreeView*)view, x, y, &tp, &pos);
/* handle reordering bookmark items first */
if(target == gdk_atom_intern_static_string("GTK_TREE_MODEL_ROW"))
{
/* bookmark item is being dragged */
ret = get_bookmark_drag_dest(view, &tp, &pos);
action = ret ? GDK_ACTION_MOVE : 0; /* bookmark items can only be moved */
}
/* try FmDndDest */
else if(fm_dnd_dest_is_target_supported(view->dnd_dest, target))
{
/* the user is dragging files. get FmFileInfo of drop site. */
if(pos == GTK_TREE_VIEW_DROP_INTO_OR_BEFORE || pos == GTK_TREE_VIEW_DROP_INTO_OR_AFTER) /* drag into items */
{
FmPlaceItem* item = NULL;
GtkTreeIter it;
/* FIXME: handle adding bookmarks with Dnd */
if(tp && gtk_tree_model_get_iter(GTK_TREE_MODEL(model), &it, tp))
gtk_tree_model_get(GTK_TREE_MODEL(model), &it, FM_PLACES_MODEL_COL_INFO, &item, -1);
fm_dnd_dest_set_dest_file(view->dnd_dest, item && item->fi ? item->fi : NULL);
action = fm_dnd_dest_get_default_action(view->dnd_dest, drag_context, target);
ret = action != 0;
}
else /* drop between items, create bookmark items for dragged files */
{
if( (!tp || fm_places_model_path_is_bookmark(FM_PLACES_MODEL(model), tp))
&& get_bookmark_drag_dest(view, &tp, &pos)) /* tp is after separator */
{
action = GDK_ACTION_LINK;
ret = TRUE;
}
else
{
action = 0;
ret = FALSE;
}
}
}
gdk_drag_status(drag_context, action, time);
if(ret)
gtk_tree_view_set_drag_dest_row(GTK_TREE_VIEW(view), tp, pos);
else
gtk_tree_view_set_drag_dest_row(GTK_TREE_VIEW(view), NULL, 0);
if(tp)
gtk_tree_path_free(tp);
return ret;
}
