diff options
Diffstat (limited to 'libnautilus-private/nautilus-tree-view-drag-dest.c')
| -rw-r--r-- | libnautilus-private/nautilus-tree-view-drag-dest.c | 686 |
1 files changed, 686 insertions, 0 deletions
diff --git a/libnautilus-private/nautilus-tree-view-drag-dest.c b/libnautilus-private/nautilus-tree-view-drag-dest.c new file mode 100644 index 000000000..96ffb5cd0 --- /dev/null +++ b/libnautilus-private/nautilus-tree-view-drag-dest.c @@ -0,0 +1,686 @@ +/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */ + +/* + * Nautilus + * + * Copyright (C) 2002 Sun Microsystems, Inc. + * + * Nautilus 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. + * + * Nautilus 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., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + * + * Author: Dave Camp <dave@ximian.com> + */ + +/* nautilus-tree-view-drag-dest.c: Handles drag and drop for treeviews which + * contain a hierarchy of files + */ + +#include <config.h> +#include "nautilus-tree-view-drag-dest.h" + +#include <eel/eel-gtk-macros.h> +#include <gtk/gtkmain.h> +#include <gtk/gtksignal.h> +#include <libgnome/gnome-macros.h> +#include <libgnomevfs/gnome-vfs-utils.h> +#include "nautilus-file-dnd.h" +#include "nautilus-icon-dnd.h" +#include "nautilus-link.h" +#include "nautilus-marshal.h" + +#define AUTO_SCROLL_MARGIN 20 + +struct _NautilusTreeViewDragDestDetails { + GtkTreeView *tree_view; + + gboolean drop_occurred; + + gboolean have_drag_data; + guint drag_type; + GtkSelectionData *drag_data; + GList *drag_list; + + guint highlight_id; + guint scroll_id; +}; + +enum { + GET_ROOT_URI, + GET_FILE_FOR_PATH, + MOVE_COPY_ITEMS, + LAST_SIGNAL +}; + +static void nautilus_tree_view_drag_dest_instance_init (NautilusTreeViewDragDest *dest); +static void nautilus_tree_view_drag_dest_class_init (NautilusTreeViewDragDestClass *class); + +static guint signals[LAST_SIGNAL]; + +GNOME_CLASS_BOILERPLATE (NautilusTreeViewDragDest, + nautilus_tree_view_drag_dest, + GObject, G_TYPE_OBJECT); + +static GtkTargetEntry drag_types [] = { + { NAUTILUS_ICON_DND_GNOME_ICON_LIST_TYPE, 0, NAUTILUS_ICON_DND_GNOME_ICON_LIST }, + { NAUTILUS_ICON_DND_URI_LIST_TYPE, 0, NAUTILUS_ICON_DND_URI_LIST }, + { NAUTILUS_ICON_DND_URL_TYPE, 0, NAUTILUS_ICON_DND_URL } + /* FIXME: Should handle emblems once the list view supports them */ +}; + + +static void +gtk_tree_view_vertical_autoscroll (GtkTreeView *tree_view) +{ + GdkRectangle visible_rect; + GtkAdjustment *vadjustment; + GdkWindow *window; + int y; + int offset; + float value; + + window = gtk_tree_view_get_bin_window (tree_view); + vadjustment = gtk_tree_view_get_vadjustment (tree_view); + + gdk_window_get_pointer (window, NULL, &y, NULL); + + y += vadjustment->value; + + gtk_tree_view_get_visible_rect (tree_view, &visible_rect); + + offset = y - (visible_rect.y + 2 * AUTO_SCROLL_MARGIN); + if (offset > 0) { + offset = y - (visible_rect.y + visible_rect.height - 2 * AUTO_SCROLL_MARGIN); + if (offset < 0) { + return; + } + } + + value = CLAMP (vadjustment->value + offset, 0.0, + vadjustment->upper - vadjustment->page_size); + gtk_adjustment_set_value (vadjustment, value); +} + +static int +scroll_timeout (gpointer data) +{ + GtkTreeView *tree_view = GTK_TREE_VIEW (data); + + gtk_tree_view_vertical_autoscroll (tree_view); + + return TRUE; +} + +static void +remove_scroll_timeout (NautilusTreeViewDragDest *dest) +{ + if (dest->details->scroll_id) { + gtk_timeout_remove (dest->details->scroll_id); + dest->details->scroll_id = 0; + } +} + +static gboolean +highlight_expose (GtkWidget *widget, + GdkEventExpose *event, + gpointer data) +{ + GdkWindow *bin_window; + int width; + int height; + + if (GTK_WIDGET_DRAWABLE (widget)) { + bin_window = + gtk_tree_view_get_bin_window (GTK_TREE_VIEW (widget)); + + gdk_drawable_get_size (bin_window, &width, &height); + + gtk_paint_focus (widget->style, + bin_window, + GTK_WIDGET_STATE (widget), + NULL, + widget, + "treeview-drop-indicator", + 0, 0, width, height); + } + + return FALSE; +} + +static void +set_widget_highlight (NautilusTreeViewDragDest *dest, gboolean highlight) +{ + if (!highlight && dest->details->highlight_id) { + g_signal_handler_disconnect (dest->details->tree_view, + dest->details->highlight_id); + dest->details->highlight_id = 0; + } + + if (highlight && !dest->details->highlight_id) { + dest->details->highlight_id = + g_signal_connect_object (dest->details->tree_view, + "expose_event", + G_CALLBACK (highlight_expose), + dest, + G_CONNECT_AFTER); + } + gtk_widget_queue_draw (GTK_WIDGET (dest->details->tree_view)); +} + +static void +set_drag_dest_row (NautilusTreeViewDragDest *dest, + GtkTreePath *path) +{ + if (path) { + set_widget_highlight (dest, FALSE); + gtk_tree_view_set_drag_dest_row + (dest->details->tree_view, + path, + GTK_TREE_VIEW_DROP_INTO_OR_BEFORE); + } else { + set_widget_highlight (dest, TRUE); + gtk_tree_view_set_drag_dest_row (dest->details->tree_view, + NULL, + 0); + } +} + +static void +clear_drag_dest_row (NautilusTreeViewDragDest *dest) +{ + gtk_tree_view_set_drag_dest_row (dest->details->tree_view, NULL, 0); + set_widget_highlight (dest, FALSE); +} + +static void +get_drag_data (NautilusTreeViewDragDest *dest, + GdkDragContext *context, + guint32 time) +{ + GdkAtom target; + + target = gtk_drag_dest_find_target (GTK_WIDGET (dest->details->tree_view), + context, + NULL); + + gtk_drag_get_data (GTK_WIDGET (dest->details->tree_view), + context, target, time); +} + +static void +free_drag_data (NautilusTreeViewDragDest *dest) +{ + dest->details->have_drag_data = FALSE; + + if (dest->details->drag_data) { + gtk_selection_data_free (dest->details->drag_data); + dest->details->drag_data = NULL; + } + + if (dest->details->drag_list) { + nautilus_drag_destroy_selection_list (dest->details->drag_list); + dest->details->drag_list = NULL; + } +} + +static char * +get_root_uri (NautilusTreeViewDragDest *dest) +{ + char *uri; + + g_signal_emit (dest, signals[GET_ROOT_URI], 0, &uri); + + return uri; +} + +static NautilusFile * +file_for_path (NautilusTreeViewDragDest *dest, GtkTreePath *path) +{ + NautilusFile *file; + char *uri; + + if (path) { + g_signal_emit (dest, signals[GET_FILE_FOR_PATH], 0, path, &file); + } else { + uri = get_root_uri (dest); + + file = nautilus_file_get (uri); + + g_free (uri); + } + + return file; +} + +static GtkTreePath * +get_drop_path (NautilusTreeViewDragDest *dest, + GtkTreePath *path) +{ + NautilusFile *file; + GtkTreePath *ret; + + if (!path) { + return NULL; + } + + file = file_for_path (dest, path); + + ret = NULL; + + if (!file || !nautilus_drag_can_accept_items (file, dest->details->drag_list)){ + if (gtk_tree_path_get_depth (path) == 1) { + ret = NULL; + } else { + ret = gtk_tree_path_copy (path); + gtk_tree_path_up (ret); + } + } else { + ret = gtk_tree_path_copy (path); + } + + nautilus_file_unref (file); + + return ret; +} + +static char * +get_drop_target (NautilusTreeViewDragDest *dest, + GtkTreePath *path) +{ + NautilusFile *file; + char *target; + + file = file_for_path (dest, path); + target = nautilus_file_get_drop_target_uri (file); + nautilus_file_unref (file); + + return target; +} + +static guint +get_drop_action (NautilusTreeViewDragDest *dest, + GdkDragContext *context, + GtkTreePath *path) +{ + char *drop_target; + guint action; + + if (!dest->details->have_drag_data || !dest->details->drag_list) { + return 0; + } + + switch (dest->details->drag_type) { + case NAUTILUS_ICON_DND_GNOME_ICON_LIST : + drop_target = get_drop_target (dest, path); + + if (!drop_target) { + return 0; + } + + nautilus_drag_default_drop_action_for_icons + (context, + drop_target, + dest->details->drag_list, + &action); + + g_free (drop_target); + + return action; + case NAUTILUS_ICON_DND_URI_LIST : + case NAUTILUS_ICON_DND_URL : + return context->suggested_action; + } + + return 0; +} + +static gboolean +drag_motion_callback (GtkWidget *widget, + GdkDragContext *context, + int x, + int y, + guint32 time, + gpointer data) +{ + NautilusTreeViewDragDest *dest; + GtkTreePath *path; + GtkTreePath *drop_path; + GtkTreeViewDropPosition pos; + guint action; + + dest = NAUTILUS_TREE_VIEW_DRAG_DEST (data); + + gtk_tree_view_get_dest_row_at_pos (GTK_TREE_VIEW (widget), + x, y, &path, &pos); + + + if (!dest->details->have_drag_data) { + get_drag_data (dest, context, time); + } + drop_path = get_drop_path (dest, path); + + action = get_drop_action (dest, context, drop_path); + + if (action) { + set_drag_dest_row (dest, drop_path); + } else { + clear_drag_dest_row (dest); + } + + if (path) { + gtk_tree_path_free (path); + } + + if (drop_path) { + gtk_tree_path_free (drop_path); + } + + if (dest->details->scroll_id == 0) { + dest->details->scroll_id = + gtk_timeout_add (150, + scroll_timeout, + dest->details->tree_view); + } + + gdk_drag_status (context, action, time); + + return TRUE; +} + +static void +drag_leave_callback (GtkWidget *widget, + GdkDragContext *context, + guint32 time, + gpointer data) +{ + NautilusTreeViewDragDest *dest; + + dest = NAUTILUS_TREE_VIEW_DRAG_DEST (data); + + clear_drag_dest_row (dest); + + free_drag_data (dest); + + remove_scroll_timeout (dest); +} + +static void +receive_uris (NautilusTreeViewDragDest *dest, + GdkDragContext *context, + GList *source_uris, + int x, int y) +{ + char *drop_target; + GtkTreePath *path; + GtkTreePath *drop_path; + GtkTreeViewDropPosition pos; + GdkDragAction action; + + gtk_tree_view_get_dest_row_at_pos (dest->details->tree_view, x, y, + &path, &pos); + + drop_path = get_drop_path (dest, path); + + drop_target = get_drop_target (dest, drop_path); + + if (context->action == GDK_ACTION_ASK) { + if (nautilus_drag_selection_includes_special_link (dest->details->drag_list)) { + /* We only want to move the trash */ + action = GDK_ACTION_MOVE; + } else { + action = GDK_ACTION_MOVE | GDK_ACTION_COPY | GDK_ACTION_LINK; + } + context->action = nautilus_drag_drop_action_ask (action); + } + + /* We only want to copy external uris */ + if (dest->details->drag_type == NAUTILUS_ICON_DND_URI_LIST) { + action = GDK_ACTION_COPY; + } + + if (context->action > 0) { + g_signal_emit (dest, signals[MOVE_COPY_ITEMS], 0, + source_uris, + drop_target, + context->action, + x, y); + } + + if (path) { + gtk_tree_path_free (path); + } + + if (drop_path) { + gtk_tree_path_free (drop_path); + } + + g_free (drop_target); +} + +static void +receive_dropped_icons (NautilusTreeViewDragDest *dest, + GdkDragContext *context, + int x, int y) +{ + GList *source_uris; + GList *l; + + /* FIXME: ignore local only moves */ + + if (!dest->details->drag_list) { + return; + } + + source_uris = NULL; + for (l = dest->details->drag_list; l != NULL; l = l->next) { + source_uris = g_list_prepend (source_uris, + ((NautilusDragSelectionItem *)l->data)->uri); + } + + source_uris = g_list_reverse (source_uris); + + receive_uris (dest, context, source_uris, x, y); + + g_list_free (source_uris); +} + +static void +receive_dropped_uri_list (NautilusTreeViewDragDest *dest, + GdkDragContext *context, + int x, int y) +{ + GList *source_uris; + + if (!dest->details->drag_data) { + return; + } + + source_uris = nautilus_icon_dnd_uri_list_extract_uris ((char*)dest->details->drag_data->data); + + receive_uris (dest, context, source_uris, x, y); + + nautilus_icon_dnd_uri_list_free_strings (source_uris); +} + +static gboolean +drag_data_received_callback (GtkWidget *widget, + GdkDragContext *context, + int x, + int y, + GtkSelectionData *selection_data, + guint info, + guint32 time, + gpointer data) +{ + NautilusTreeViewDragDest *dest; + gboolean success; + + dest = NAUTILUS_TREE_VIEW_DRAG_DEST (data); + + if (!dest->details->have_drag_data) { + dest->details->have_drag_data = TRUE; + dest->details->drag_type = info; + dest->details->drag_data = + gtk_selection_data_copy (selection_data); + if (info == NAUTILUS_ICON_DND_GNOME_ICON_LIST) { + dest->details->drag_list = + nautilus_drag_build_selection_list (selection_data); + } + } + + if (dest->details->drop_occurred) { + success = FALSE; + switch (info) { + case NAUTILUS_ICON_DND_GNOME_ICON_LIST : + receive_dropped_icons (dest, context, x, y); + success = TRUE; + break; + case NAUTILUS_ICON_DND_URI_LIST : + case NAUTILUS_ICON_DND_URL : + receive_dropped_uri_list (dest, context, x, y); + success = TRUE; + break; + } + + dest->details->drop_occurred = FALSE; + free_drag_data (dest); + gtk_drag_finish (context, success, FALSE, time); + } + + /* appease GtkTreeView by preventing its drag_data_receive + * from being called */ + g_signal_stop_emission_by_name (dest->details->tree_view, + "drag_data_received"); + + return TRUE; +} + +static gboolean +drag_drop_callback (GtkWidget *widget, + GdkDragContext *context, + int x, + int y, + guint32 time, + gpointer data) +{ + NautilusTreeViewDragDest *dest; + + dest = NAUTILUS_TREE_VIEW_DRAG_DEST (data); + + dest->details->drop_occurred = TRUE; + + get_drag_data (dest, context, time); + remove_scroll_timeout (dest); + clear_drag_dest_row (dest); + + return TRUE; +} + +static void +nautilus_tree_view_drag_dest_finalize (GObject *object) +{ + NautilusTreeViewDragDest *dest; + + dest = NAUTILUS_TREE_VIEW_DRAG_DEST (object); + + free_drag_data (dest); + + g_free (dest->details); + + EEL_CALL_PARENT (G_OBJECT_CLASS, finalize, (object)); +} + +static void +nautilus_tree_view_drag_dest_instance_init (NautilusTreeViewDragDest *dest) +{ + dest->details = g_new0 (NautilusTreeViewDragDestDetails, 1); +} + +static void +nautilus_tree_view_drag_dest_class_init (NautilusTreeViewDragDestClass *class) +{ + GObjectClass *gobject_class; + + gobject_class = G_OBJECT_CLASS (class); + + gobject_class->finalize = nautilus_tree_view_drag_dest_finalize; + + signals[GET_ROOT_URI] = + g_signal_new ("get_root_uri", + G_TYPE_FROM_CLASS (class), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (NautilusTreeViewDragDestClass, + get_root_uri), + NULL, NULL, + nautilus_marshal_STRING__VOID, + G_TYPE_STRING, 0); + signals[GET_FILE_FOR_PATH] = + g_signal_new ("get_file_for_path", + G_TYPE_FROM_CLASS (class), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (NautilusTreeViewDragDestClass, + get_file_for_path), + NULL, NULL, + nautilus_marshal_OBJECT__BOXED, + NAUTILUS_TYPE_FILE, 1, + GTK_TYPE_TREE_PATH); + signals[MOVE_COPY_ITEMS] = + g_signal_new ("move_copy_items", + G_TYPE_FROM_CLASS (class), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (NautilusTreeViewDragDestClass, + move_copy_items), + NULL, NULL, + + nautilus_marshal_VOID__POINTER_STRING_UINT_INT_INT, + G_TYPE_NONE, 5, + G_TYPE_POINTER, + G_TYPE_STRING, + G_TYPE_UINT, + G_TYPE_INT, + G_TYPE_INT); +} + +NautilusTreeViewDragDest * +nautilus_tree_view_drag_dest_new (GtkTreeView *tree_view) +{ + NautilusTreeViewDragDest *dest; + + dest = g_object_new (NAUTILUS_TYPE_TREE_VIEW_DRAG_DEST, NULL); + + dest->details->tree_view = tree_view; + + gtk_drag_dest_set (GTK_WIDGET (tree_view), + 0, drag_types, G_N_ELEMENTS (drag_types), + GDK_ACTION_MOVE | GDK_ACTION_COPY | GDK_ACTION_LINK | GDK_ACTION_ASK); + + g_signal_connect_object (tree_view, + "drag_motion", + G_CALLBACK (drag_motion_callback), + dest, 0); + g_signal_connect_object (tree_view, + "drag_leave", + G_CALLBACK (drag_leave_callback), + dest, 0); + g_signal_connect_object (tree_view, + "drag_drop", + G_CALLBACK (drag_drop_callback), + dest, 0); + g_signal_connect_object (tree_view, + "drag_data_received", + G_CALLBACK (drag_data_received_callback), + dest, 0); + + return dest; +} |