gtkfilechooserdefault.c

/* GTK - The GIMP Toolkit
 * gtkfilechooserdefault.c: Default implementation of GtkFileChooser
 * Copyright (C) 2003, Red Hat, Inc.
 *
 * 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, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include <config.h>
#include "gdk/gdkkeysyms.h"
#include "gtkalignment.h"
#include "gtkbindings.h"
#include "gtkbutton.h"
#include "gtkcelllayout.h"
#include "gtkcellrendererpixbuf.h"
#include "gtkcellrendererseptext.h"
#include "gtkcellrenderertext.h"
#include "gtkcheckmenuitem.h"
#include "gtkcombobox.h"
#include "gtkentry.h"
#include "gtkexpander.h"
#include "gtkfilechooserdefault.h"
#include "gtkfilechooserembed.h"
#include "gtkfilechooserentry.h"
#include "gtkfilechooserutils.h"
#include "gtkfilechooser.h"
#include "gtkfilesystemmodel.h"
#include "gtkframe.h"
#include "gtkhbox.h"
#include "gtkhpaned.h"
#include "gtkiconfactory.h"
#include "gtkicontheme.h"
#include "gtkimage.h"
#include "gtkintl.h"
#include "gtklabel.h"
#include "gtkmarshalers.h"
#include "gtkmenuitem.h"
#include "gtkmessagedialog.h"
#include "gtkpathbar.h"
#include "gtkprivate.h"
#include "gtkscrolledwindow.h"
#include "gtksizegroup.h"
#include "gtkstock.h"
#include "gtktable.h"
#include "gtktreednd.h"
#include "gtktreeprivate.h"
#include "gtktreeview.h"
#include "gtktreemodelsort.h"
#include "gtktreeselection.h"
#include "gtktreestore.h"
#include "gtktypebuiltins.h"
#include "gtkvbox.h"

#if defined (G_OS_UNIX)
#include "gtkfilesystemunix.h"
#elif defined (G_OS_WIN32)
#include "gtkfilesystemwin32.h"
#endif

#include <string.h>
#include <time.h>

typedef struct _GtkFileChooserDefaultClass GtkFileChooserDefaultClass;

#define GTK_FILE_CHOOSER_DEFAULT_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_FILE_CHOOSER_DEFAULT, GtkFileChooserDefaultClass))
#define GTK_IS_FILE_CHOOSER_DEFAULT_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_FILE_CHOOSER_DEFAULT))
#define GTK_FILE_CHOOSER_DEFAULT_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_FILE_CHOOSER_DEFAULT, GtkFileChooserDefaultClass))


struct _GtkFileChooserDefaultClass
{
  GtkVBoxClass parent_class;
};

struct _GtkFileChooserDefault
{
  GtkVBox parent_instance;

  GtkFileChooserAction action;

  GtkFileSystem *file_system;

  /* Save mode widgets */
  GtkWidget *save_widgets;

  GtkWidget *save_file_name_entry;
  GtkWidget *save_folder_label;
  GtkWidget *save_folder_combo;
  GtkWidget *save_extra_align;
  GtkWidget *save_expander;

  /* The file browsing widgets */
  GtkWidget *browse_widgets;
  GtkWidget *browse_shortcuts_tree_view;
  GtkWidget *browse_shortcuts_add_button;
  GtkWidget *browse_shortcuts_remove_button;
  GtkWidget *browse_files_tree_view;
  GtkWidget *browse_files_popup_menu;
  GtkWidget *browse_files_popup_menu_hidden_files_item;
  GtkWidget *browse_new_folder_button;
  GtkWidget *browse_path_bar;
  GtkWidget *browse_extra_align;

  GtkFileSystemModel *browse_files_model;

  GtkWidget *filter_combo_hbox;
  GtkWidget *filter_combo;
  GtkWidget *preview_box;
  GtkWidget *preview_label;
  GtkWidget *preview_widget;
  GtkWidget *extra_widget;

  GtkListStore *shortcuts_model;
  GtkTreeModel *shortcuts_filter_model;

  GtkTreeModelSort *sort_model;

  GtkFileFilter *current_filter;
  GSList *filters;

  gboolean has_home;
  gboolean has_desktop;

  int num_volumes;
  int num_shortcuts;
  int num_bookmarks;

  guint volumes_changed_id;
  guint bookmarks_changed_id;

  GtkFilePath *current_volume_path;
  GtkFilePath *current_folder;
  GtkFilePath *preview_path;
  char *preview_display_name;

  GtkTreeViewColumn *list_name_column;
  GtkCellRenderer *list_name_renderer;

  guint settings_signal_id;
  int icon_size;

#if 0
  GdkDragContext *shortcuts_drag_context;
  GSource *shortcuts_drag_outside_idle;
#endif

  /* Flags */

  guint local_only : 1;
  guint preview_widget_active : 1;
  guint use_preview_label : 1;
  guint select_multiple : 1;
  guint show_hidden : 1;
  guint list_sort_ascending : 1;
  guint changing_folder : 1;
  guint shortcuts_current_folder_active : 1;
  guint shortcuts_current_folder_is_volume : 1;

#if 0
  guint shortcuts_drag_outside : 1;
#endif
};

/* Signal IDs */
enum {
  LOCATION_POPUP,
  UP_FOLDER,
  DOWN_FOLDER,
  HOME_FOLDER,
  LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };

/* Column numbers for the shortcuts tree.  Keep these in sync with shortcuts_model_create() */
enum {
  SHORTCUTS_COL_PIXBUF,
  SHORTCUTS_COL_NAME,
  SHORTCUTS_COL_PATH,
  SHORTCUTS_COL_REMOVABLE,
  SHORTCUTS_COL_PIXBUF_VISIBLE,
  SHORTCUTS_COL_NUM_COLUMNS
};

/* Column numbers for the file list */
enum {
  FILE_LIST_COL_NAME,
  FILE_LIST_COL_SIZE,
  FILE_LIST_COL_MTIME,
  FILE_LIST_COL_NUM_COLUMNS
};

/* Identifiers for target types */
enum {
  GTK_TREE_MODEL_ROW,
  TEXT_URI_LIST
};

/* Target types for dragging from the shortcuts list */
static GtkTargetEntry shortcuts_source_targets[] = {
  { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_WIDGET, GTK_TREE_MODEL_ROW }
};

static const int num_shortcuts_source_targets = (sizeof (shortcuts_source_targets)
						 / sizeof (shortcuts_source_targets[0]));

/* Target types for dropping into the shortcuts list */
static GtkTargetEntry shortcuts_dest_targets[] = {
  { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_WIDGET, GTK_TREE_MODEL_ROW },
  { "text/uri-list", 0, TEXT_URI_LIST }
};

static const int num_shortcuts_dest_targets = (sizeof (shortcuts_dest_targets)
					       / sizeof (shortcuts_dest_targets[0]));

/* Target types for DnD from the file list */
static GtkTargetEntry file_list_source_targets[] = {
  { "text/uri-list", 0, TEXT_URI_LIST }
};

static const int num_file_list_source_targets = (sizeof (file_list_source_targets)
						 / sizeof (file_list_source_targets[0]));

/* Interesting places in the shortcuts bar */
typedef enum {
  SHORTCUTS_HOME,
  SHORTCUTS_DESKTOP,
  SHORTCUTS_VOLUMES,
  SHORTCUTS_SHORTCUTS,
  SHORTCUTS_BOOKMARKS_SEPARATOR,
  SHORTCUTS_BOOKMARKS,
  SHORTCUTS_CURRENT_FOLDER_SEPARATOR,
  SHORTCUTS_CURRENT_FOLDER
} ShortcutsIndex;

/* Icon size for if we can't get it from the theme */
#define FALLBACK_ICON_SIZE 20

#define PREVIEW_HBOX_SPACING 12
#define NUM_LINES 40
#define NUM_CHARS 60

static void gtk_file_chooser_default_class_init       (GtkFileChooserDefaultClass *class);
static void gtk_file_chooser_default_iface_init       (GtkFileChooserIface        *iface);
static void gtk_file_chooser_embed_default_iface_init (GtkFileChooserEmbedIface   *iface);
static void gtk_file_chooser_default_init             (GtkFileChooserDefault      *impl);

static GObject* gtk_file_chooser_default_constructor  (GType                  type,
						       guint                  n_construct_properties,
						       GObjectConstructParam *construct_params);
static void     gtk_file_chooser_default_finalize     (GObject               *object);
static void     gtk_file_chooser_default_set_property (GObject               *object,
						       guint                  prop_id,
						       const GValue          *value,
						       GParamSpec            *pspec);
static void     gtk_file_chooser_default_get_property (GObject               *object,
						       guint                  prop_id,
						       GValue                *value,
						       GParamSpec            *pspec);
static void     gtk_file_chooser_default_dispose      (GObject               *object);
static void     gtk_file_chooser_default_show_all       (GtkWidget             *widget);
static void     gtk_file_chooser_default_style_set      (GtkWidget             *widget,
							 GtkStyle              *previous_style);
static void     gtk_file_chooser_default_screen_changed (GtkWidget             *widget,
							 GdkScreen             *previous_screen);

static gboolean       gtk_file_chooser_default_set_current_folder 	   (GtkFileChooser    *chooser,
									    const GtkFilePath *path,
									    GError           **error);
static GtkFilePath *  gtk_file_chooser_default_get_current_folder 	   (GtkFileChooser    *chooser);
static void           gtk_file_chooser_default_set_current_name   	   (GtkFileChooser    *chooser,
									    const gchar       *name);
static gboolean       gtk_file_chooser_default_select_path        	   (GtkFileChooser    *chooser,
									    const GtkFilePath *path,
									    GError           **error);
static void           gtk_file_chooser_default_unselect_path      	   (GtkFileChooser    *chooser,
									    const GtkFilePath *path);
static void           gtk_file_chooser_default_select_all         	   (GtkFileChooser    *chooser);
static void           gtk_file_chooser_default_unselect_all       	   (GtkFileChooser    *chooser);
static GSList *       gtk_file_chooser_default_get_paths          	   (GtkFileChooser    *chooser);
static GtkFilePath *  gtk_file_chooser_default_get_preview_path   	   (GtkFileChooser    *chooser);
static GtkFileSystem *gtk_file_chooser_default_get_file_system    	   (GtkFileChooser    *chooser);
static void           gtk_file_chooser_default_add_filter         	   (GtkFileChooser    *chooser,
									    GtkFileFilter     *filter);
static void           gtk_file_chooser_default_remove_filter      	   (GtkFileChooser    *chooser,
									    GtkFileFilter     *filter);
static GSList *       gtk_file_chooser_default_list_filters       	   (GtkFileChooser    *chooser);
static gboolean       gtk_file_chooser_default_add_shortcut_folder    (GtkFileChooser    *chooser,
								       const GtkFilePath *path,
								       GError           **error);
static gboolean       gtk_file_chooser_default_remove_shortcut_folder (GtkFileChooser    *chooser,
								       const GtkFilePath *path,
								       GError           **error);
static GSList *       gtk_file_chooser_default_list_shortcut_folders  (GtkFileChooser    *chooser);

static void           gtk_file_chooser_default_get_default_size       (GtkFileChooserEmbed *chooser_embed,
								       gint                *default_width,
								       gint                *default_height);
static void           gtk_file_chooser_default_get_resizable_hints    (GtkFileChooserEmbed *chooser_embed,
								       gboolean            *resize_horizontally,
								       gboolean            *resize_vertically);
static gboolean       gtk_file_chooser_default_should_respond         (GtkFileChooserEmbed *chooser_embed);
static void           gtk_file_chooser_default_initial_focus          (GtkFileChooserEmbed *chooser_embed);

static void location_popup_handler (GtkFileChooserDefault *impl);
static void up_folder_handler      (GtkFileChooserDefault *impl);
static void down_folder_handler    (GtkFileChooserDefault *impl);
static void home_folder_handler    (GtkFileChooserDefault *impl);
static void update_appearance      (GtkFileChooserDefault *impl);

static void set_current_filter   (GtkFileChooserDefault *impl,
				  GtkFileFilter         *filter);
static void check_preview_change (GtkFileChooserDefault *impl);

static void filter_combo_changed       (GtkComboBox           *combo_box,
					GtkFileChooserDefault *impl);
static void     shortcuts_row_activated_cb (GtkTreeView           *tree_view,
					    GtkTreePath           *path,
					    GtkTreeViewColumn     *column,
					    GtkFileChooserDefault *impl);

static gboolean shortcuts_key_press_event_cb (GtkWidget             *widget,
					      GdkEventKey           *event,
					      GtkFileChooserDefault *impl);

static gboolean shortcuts_select_func   (GtkTreeSelection      *selection,
					 GtkTreeModel          *model,
					 GtkTreePath           *path,
					 gboolean               path_currently_selected,
					 gpointer               data);
static void shortcuts_activate_item (GtkFileChooserDefault *impl,
				     int                    item_num);
static int shortcuts_get_index (GtkFileChooserDefault *impl,
				ShortcutsIndex         where);
static int shortcut_find_position (GtkFileChooserDefault *impl,
				   const GtkFilePath     *path);

static void list_selection_changed     (GtkTreeSelection      *tree_selection,
					GtkFileChooserDefault *impl);
static void list_row_activated         (GtkTreeView           *tree_view,
					GtkTreePath           *path,
					GtkTreeViewColumn     *column,
					GtkFileChooserDefault *impl);

static void path_bar_clicked           (GtkPathBar            *path_bar,
					GtkFilePath           *file_path,
					gboolean               child_is_hidden,
					GtkFileChooserDefault *impl);

static void add_bookmark_button_clicked_cb    (GtkButton             *button,
					       GtkFileChooserDefault *impl);
static void remove_bookmark_button_clicked_cb (GtkButton             *button,
					       GtkFileChooserDefault *impl);

static void list_icon_data_func (GtkTreeViewColumn *tree_column,
				 GtkCellRenderer   *cell,
				 GtkTreeModel      *tree_model,
				 GtkTreeIter       *iter,
				 gpointer           data);
static void list_name_data_func (GtkTreeViewColumn *tree_column,
				 GtkCellRenderer   *cell,
				 GtkTreeModel      *tree_model,
				 GtkTreeIter       *iter,
				 gpointer           data);
#if 0
static void list_size_data_func (GtkTreeViewColumn *tree_column,
				 GtkCellRenderer   *cell,
				 GtkTreeModel      *tree_model,
				 GtkTreeIter       *iter,
				 gpointer           data);
#endif
static void list_mtime_data_func (GtkTreeViewColumn *tree_column,
				  GtkCellRenderer   *cell,
				  GtkTreeModel      *tree_model,
				  GtkTreeIter       *iter,
				  gpointer           data);

static GObjectClass *parent_class;



/* Drag and drop interface declarations */

typedef struct {
  GtkTreeModelFilter parent;

  GtkFileChooserDefault *impl;
} ShortcutsModelFilter;

typedef struct {
  GtkTreeModelFilterClass parent_class;
} ShortcutsModelFilterClass;

#define SHORTCUTS_MODEL_FILTER_TYPE (shortcuts_model_filter_get_type ())
#define SHORTCUTS_MODEL_FILTER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), SHORTCUTS_MODEL_FILTER_TYPE, ShortcutsModelFilter))

static void shortcuts_model_filter_drag_source_iface_init (GtkTreeDragSourceIface *iface);

G_DEFINE_TYPE_WITH_CODE (ShortcutsModelFilter,
			 shortcuts_model_filter,
			 GTK_TYPE_TREE_MODEL_FILTER,
			 G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_DRAG_SOURCE,
						shortcuts_model_filter_drag_source_iface_init));

static GtkTreeModel *shortcuts_model_filter_new (GtkFileChooserDefault *impl,
						 GtkTreeModel          *child_model,
						 GtkTreePath           *root);



GType
_gtk_file_chooser_default_get_type (void)
{
  static GType file_chooser_default_type = 0;

  if (!file_chooser_default_type)
    {
      static const GTypeInfo file_chooser_default_info =
      {
	sizeof (GtkFileChooserDefaultClass),
	NULL,		/* base_init */
	NULL,		/* base_finalize */
	(GClassInitFunc) gtk_file_chooser_default_class_init,
	NULL,		/* class_finalize */
	NULL,		/* class_data */
	sizeof (GtkFileChooserDefault),
	0,		/* n_preallocs */
	(GInstanceInitFunc) gtk_file_chooser_default_init,
      };

      static const GInterfaceInfo file_chooser_info =
      {
	(GInterfaceInitFunc) gtk_file_chooser_default_iface_init, /* interface_init */
	NULL,			                                       /* interface_finalize */
	NULL			                                       /* interface_data */
      };

      static const GInterfaceInfo file_chooser_embed_info =
      {
	(GInterfaceInitFunc) gtk_file_chooser_embed_default_iface_init, /* interface_init */
	NULL,			                                       /* interface_finalize */
	NULL			                                       /* interface_data */
      };

      file_chooser_default_type = g_type_register_static (GTK_TYPE_VBOX, "GtkFileChooserDefault",
							 &file_chooser_default_info, 0);

      g_type_add_interface_static (file_chooser_default_type,
				   GTK_TYPE_FILE_CHOOSER,
				   &file_chooser_info);
      g_type_add_interface_static (file_chooser_default_type,
				   GTK_TYPE_FILE_CHOOSER_EMBED,
				   &file_chooser_embed_info);
    }

  return file_chooser_default_type;
}

static void
gtk_file_chooser_default_class_init (GtkFileChooserDefaultClass *class)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (class);
  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
  GtkBindingSet *binding_set;

  parent_class = g_type_class_peek_parent (class);

  gobject_class->finalize = gtk_file_chooser_default_finalize;
  gobject_class->constructor = gtk_file_chooser_default_constructor;
  gobject_class->set_property = gtk_file_chooser_default_set_property;
  gobject_class->get_property = gtk_file_chooser_default_get_property;
  gobject_class->dispose = gtk_file_chooser_default_dispose;

  widget_class->show_all = gtk_file_chooser_default_show_all;
  widget_class->style_set = gtk_file_chooser_default_style_set;
  widget_class->screen_changed = gtk_file_chooser_default_screen_changed;

  signals[LOCATION_POPUP] =
    _gtk_binding_signal_new ("location-popup",
			     G_OBJECT_CLASS_TYPE (class),
			     G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
			     G_CALLBACK (location_popup_handler),
			     NULL, NULL,
			     _gtk_marshal_VOID__VOID,
			     G_TYPE_NONE, 0);
  signals[UP_FOLDER] =
    _gtk_binding_signal_new ("up-folder",
			     G_OBJECT_CLASS_TYPE (class),
			     G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
			     G_CALLBACK (up_folder_handler),
			     NULL, NULL,
			     _gtk_marshal_VOID__VOID,
			     G_TYPE_NONE, 0);
  signals[DOWN_FOLDER] =
    _gtk_binding_signal_new ("down-folder",
			     G_OBJECT_CLASS_TYPE (class),
			     G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
			     G_CALLBACK (down_folder_handler),
			     NULL, NULL,
			     _gtk_marshal_VOID__VOID,
			     G_TYPE_NONE, 0);
  signals[HOME_FOLDER] =
    _gtk_binding_signal_new ("home-folder",
			     G_OBJECT_CLASS_TYPE (class),
			     G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
			     G_CALLBACK (home_folder_handler),
			     NULL, NULL,
			     _gtk_marshal_VOID__VOID,
			     G_TYPE_NONE, 0);

  binding_set = gtk_binding_set_by_class (class);

  gtk_binding_entry_add_signal (binding_set,
				GDK_l, GDK_CONTROL_MASK,
				"location-popup",
				0);

  gtk_binding_entry_add_signal (binding_set,
				GDK_Up, GDK_MOD1_MASK,
				"up-folder",
				0);
  gtk_binding_entry_add_signal (binding_set,
				GDK_KP_Up, GDK_MOD1_MASK,
				"up-folder",
				0);

  gtk_binding_entry_add_signal (binding_set,
				GDK_Down, GDK_MOD1_MASK,
				"down-folder",
				0);
  gtk_binding_entry_add_signal (binding_set,
				GDK_KP_Down, GDK_MOD1_MASK,
				"down-folder",
				0);

  gtk_binding_entry_add_signal (binding_set,
				GDK_Home, GDK_MOD1_MASK,
				"home-folder",
				0);
  gtk_binding_entry_add_signal (binding_set,
				GDK_KP_Home, GDK_MOD1_MASK,
				"home-folder",
				0);

  _gtk_file_chooser_install_properties (gobject_class);

  gtk_settings_install_property (g_param_spec_string ("gtk-file-chooser-backend",
						      P_("Default file chooser backend"),
						      P_("Name of the GtkFileChooser backend to use by default"),
						      NULL,
						      G_PARAM_READWRITE));
}

static void
gtk_file_chooser_default_iface_init (GtkFileChooserIface *iface)
{
  iface->select_path = gtk_file_chooser_default_select_path;
  iface->unselect_path = gtk_file_chooser_default_unselect_path;
  iface->select_all = gtk_file_chooser_default_select_all;
  iface->unselect_all = gtk_file_chooser_default_unselect_all;
  iface->get_paths = gtk_file_chooser_default_get_paths;
  iface->get_preview_path = gtk_file_chooser_default_get_preview_path;
  iface->get_file_system = gtk_file_chooser_default_get_file_system;
  iface->set_current_folder = gtk_file_chooser_default_set_current_folder;
  iface->get_current_folder = gtk_file_chooser_default_get_current_folder;
  iface->set_current_name = gtk_file_chooser_default_set_current_name;
  iface->add_filter = gtk_file_chooser_default_add_filter;
  iface->remove_filter = gtk_file_chooser_default_remove_filter;
  iface->list_filters = gtk_file_chooser_default_list_filters;
  iface->add_shortcut_folder = gtk_file_chooser_default_add_shortcut_folder;
  iface->remove_shortcut_folder = gtk_file_chooser_default_remove_shortcut_folder;
  iface->list_shortcut_folders = gtk_file_chooser_default_list_shortcut_folders;
}

static void
gtk_file_chooser_embed_default_iface_init (GtkFileChooserEmbedIface *iface)
{
  iface->get_default_size = gtk_file_chooser_default_get_default_size;
  iface->get_resizable_hints = gtk_file_chooser_default_get_resizable_hints;
  iface->should_respond = gtk_file_chooser_default_should_respond;
  iface->initial_focus = gtk_file_chooser_default_initial_focus;
}
static void
gtk_file_chooser_default_init (GtkFileChooserDefault *impl)
{
  impl->local_only = TRUE;
  impl->preview_widget_active = TRUE;
  impl->use_preview_label = TRUE;
  impl->select_multiple = FALSE;
  impl->show_hidden = FALSE;
  impl->icon_size = FALLBACK_ICON_SIZE;

  gtk_widget_set_redraw_on_allocate (GTK_WIDGET (impl), TRUE);
  gtk_box_set_spacing (GTK_BOX (impl), 12);
}

static void
gtk_file_chooser_default_finalize (GObject *object)
{
  GtkFileChooserDefault *impl = GTK_FILE_CHOOSER_DEFAULT (object);
  GSList *l;

  g_signal_handler_disconnect (impl->file_system, impl->volumes_changed_id);
  impl->volumes_changed_id = 0;
  g_signal_handler_disconnect (impl->file_system, impl->bookmarks_changed_id);
  impl->bookmarks_changed_id = 0;
  g_object_unref (impl->file_system);

  for (l = impl->filters; l; l = l->next)
    {
      GtkFileFilter *filter;

      filter = GTK_FILE_FILTER (l->data);
      g_object_unref (filter);
    }
  g_slist_free (impl->filters);

  if (impl->current_filter)
    g_object_unref (impl->current_filter);

  if (impl->current_volume_path)
    gtk_file_path_free (impl->current_volume_path);

  if (impl->current_folder)
    gtk_file_path_free (impl->current_folder);

  if (impl->preview_path)
    gtk_file_path_free (impl->preview_path);

  /* Free all the Models we have */
  if (impl->browse_files_model)
    g_object_unref (impl->browse_files_model);

  if (impl->shortcuts_model)
    g_object_unref (impl->shortcuts_model);

  if (impl->shortcuts_filter_model)
    g_object_unref (impl->shortcuts_filter_model);

  if (impl->sort_model)
    g_object_unref (impl->sort_model);

  g_free (impl->preview_display_name);

  G_OBJECT_CLASS (parent_class)->finalize (object);
}

/* Shows an error dialog set as transient for the specified window */
static void
error_message_with_parent (GtkWindow  *parent,
			   const char *msg)
{
  GtkWidget *dialog;

  dialog = gtk_message_dialog_new (parent,
				   GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
				   GTK_MESSAGE_ERROR,
				   GTK_BUTTONS_OK,
				   "%s",
				   msg);
  gtk_dialog_run (GTK_DIALOG (dialog));
  gtk_widget_destroy (dialog);
}

/* Returns a toplevel GtkWindow, or NULL if none */
static GtkWindow *
get_toplevel (GtkWidget *widget)
{
  GtkWidget *toplevel;

  toplevel = gtk_widget_get_toplevel (widget);
  if (!GTK_WIDGET_TOPLEVEL (toplevel))
    return NULL;
  else
    return GTK_WINDOW (toplevel);
}

/* Shows an error dialog for the file chooser */
static void
error_message (GtkFileChooserDefault *impl,
	       const char            *msg)
{
  error_message_with_parent (get_toplevel (GTK_WIDGET (impl)), msg);
}

/* Shows a simple error dialog relative to a path.  Frees the GError as well. */
static void
error_dialog (GtkFileChooserDefault *impl,
	      const char            *msg,
	      const GtkFilePath     *path,
	      GError                *error)
{
  g_return_if_fail (path != NULL);

  if (error)
    {
      char *uri = gtk_file_system_path_to_uri (impl->file_system, path);
      char *text = g_strdup_printf (msg,
				    uri,
				    error->message);
      error_message (impl, text);
      g_free (text);
      g_free (uri);
      g_error_free (error);
    }
}

/* Displays an error message about not being able to get information for a file.
 * Frees the GError as well.
 */
static void
error_getting_info_dialog (GtkFileChooserDefault *impl,
			   const GtkFilePath     *path,
			   GError                *error)
{
  error_dialog (impl,
		_("Could not retrieve information about %s:\n%s"),
		path, error);
}

/* Shows an error dialog about not being able to add a bookmark */
static void
error_could_not_add_bookmark_dialog (GtkFileChooserDefault *impl,
				     const GtkFilePath     *path,
				     GError                *error)
{
  error_dialog (impl,
		_("Could not add a bookmark for %s:\n%s"),
		path, error);
}

/* Shows an error dialog about not being able to compose a filename */
static void
error_building_filename_dialog (GtkFileChooserDefault *impl,
				const GtkFilePath     *base_path,
				const char            *file_part,
				GError                *error)
{
  char *uri;
  char *msg;

  uri = gtk_file_system_path_to_uri (impl->file_system, base_path);
  msg = g_strdup_printf (_("Could not build file name from '%s' and '%s':\n%s"),
			 uri, file_part,
			 error->message);
  error_message (impl, msg);
  g_free (uri);
  g_free (msg);
  g_error_free (error);
}

/* Shows an error dialog when we cannot switch to a folder */
static void
error_changing_folder_dialog (GtkFileChooserDefault *impl,
			      const GtkFilePath     *path,
			      GError                *error)
{
  error_dialog (impl,
		_("Could not change the current folder to %s:\n%s"),
		path,
		error);
}

/* Changes folders, displaying an error dialog if this fails */
static gboolean
change_folder_and_display_error (GtkFileChooserDefault *impl,
				 const GtkFilePath     *path)
{
  GError *error;
  gboolean result;

  error = NULL;
  result = _gtk_file_chooser_set_current_folder_path (GTK_FILE_CHOOSER (impl), path, &error);

  if (!result)
    error_changing_folder_dialog (impl, path, error);

  return result;
}

static void
update_preview_widget_visibility (GtkFileChooserDefault *impl)
{
  if (impl->use_preview_label)
    {
      if (!impl->preview_label)
	{
	  impl->preview_label = gtk_label_new (impl->preview_display_name);
	  gtk_box_pack_start (GTK_BOX (impl->preview_box), impl->preview_label, FALSE, FALSE, 0);
	  gtk_box_reorder_child (GTK_BOX (impl->preview_box), impl->preview_label, 0);
	  gtk_widget_show (impl->preview_label);
	}
    }
  else
    {
      if (impl->preview_label)
	{
	  gtk_widget_destroy (impl->preview_label);
	  impl->preview_label = NULL;
	}
    }

  if (impl->preview_widget_active && impl->preview_widget)
    gtk_widget_show (impl->preview_box);
  else
    gtk_widget_hide (impl->preview_box);

  g_signal_emit_by_name (impl, "default-size-changed");
}

static void
set_preview_widget (GtkFileChooserDefault *impl,
		    GtkWidget             *preview_widget)
{
  if (preview_widget == impl->preview_widget)
    return;

  if (impl->preview_widget)
    gtk_container_remove (GTK_CONTAINER (impl->preview_box),
			  impl->preview_widget);

  impl->preview_widget = preview_widget;
  if (impl->preview_widget)
    {
      gtk_widget_show (impl->preview_widget);
      gtk_box_pack_start (GTK_BOX (impl->preview_box), impl->preview_widget, TRUE, TRUE, 0);
      gtk_box_reorder_child (GTK_BOX (impl->preview_box),
			     impl->preview_widget,
			     (impl->use_preview_label && impl->preview_label) ? 1 : 0);
    }

  update_preview_widget_visibility (impl);
}

/* Re-reads all the icons for the shortcuts, used when the theme changes */
static void
shortcuts_reload_icons (GtkFileChooserDefault *impl)
{
  GtkTreeIter iter;
  int i;
  int bookmarks_separator_idx;
  int current_folder_separator_idx;
  int volumes_idx;

  if (!gtk_tree_model_get_iter_first (GTK_TREE_MODEL (impl->shortcuts_model), &iter))
    return;

  bookmarks_separator_idx = shortcuts_get_index (impl, SHORTCUTS_BOOKMARKS_SEPARATOR);
  current_folder_separator_idx = shortcuts_get_index (impl, SHORTCUTS_CURRENT_FOLDER_SEPARATOR);
  volumes_idx = shortcuts_get_index (impl, SHORTCUTS_VOLUMES);

  i = 0;

  do {
    gpointer data;
    gboolean pixbuf_visible;
    GdkPixbuf *pixbuf;

    gtk_tree_model_get (GTK_TREE_MODEL (impl->shortcuts_model), &iter,
			SHORTCUTS_COL_PATH, &data,
			SHORTCUTS_COL_PIXBUF_VISIBLE, &pixbuf_visible,
			-1);

    if (!pixbuf_visible || !data)
      goto next_iter;

    if (i >= volumes_idx && i < volumes_idx + impl->num_volumes)
      {
	GtkFileSystemVolume *volume;

	volume = data;
	pixbuf = gtk_file_system_volume_render_icon (impl->file_system, volume, GTK_WIDGET (impl),
						     impl->icon_size, NULL);
      }
    else
      {
	const GtkFilePath *path;

	path = data;
	pixbuf = gtk_file_system_render_icon (impl->file_system, path, GTK_WIDGET (impl),
					      impl->icon_size, NULL);
      }

    gtk_list_store_set (impl->shortcuts_model, &iter,
			SHORTCUTS_COL_PIXBUF, pixbuf,
			-1);

  next_iter:
    i++;
  } while (gtk_tree_model_iter_next (GTK_TREE_MODEL (impl->shortcuts_model),&iter));
}

/* If a shortcut corresponds to the current folder, selects it */
static void
shortcuts_find_current_folder (GtkFileChooserDefault *impl)
{
  GtkTreeSelection *selection;
  int pos;
  GtkTreePath *path;

  selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (impl->browse_shortcuts_tree_view));

  pos = shortcut_find_position (impl, impl->current_folder);
  if (pos == -1)
    {
      gtk_tree_selection_unselect_all (selection);
      return;
    }

  path = gtk_tree_path_new_from_indices (pos, -1);
  gtk_tree_selection_select_path (selection, path);
  gtk_tree_path_free (path);
}

/* Returns whether a path is a folder */
static gboolean
check_is_folder (GtkFileSystem *file_system, const GtkFilePath *path, GError **error)
{
  GtkFileFolder *folder;

  folder = gtk_file_system_get_folder (file_system, path,
				       GTK_FILE_INFO_DISPLAY_NAME,
				       error);
  if (!folder)
    return FALSE;

  g_object_unref (folder);
  return TRUE;
}

/* Convenience function to get the display name and icon info for a path */
static GtkFileInfo *
get_file_info (GtkFileSystem *file_system, const GtkFilePath *path, gboolean name_only, GError **error)
{
  GtkFilePath *parent_path;
  GtkFileFolder *parent_folder;
  GtkFileInfo *info;

  info = NULL;

  if (!gtk_file_system_get_parent (file_system, path, &parent_path, error))
    return NULL;

  parent_folder = gtk_file_system_get_folder (file_system, parent_path ? parent_path : path,
					      GTK_FILE_INFO_DISPLAY_NAME
					      | (name_only ? 0 : GTK_FILE_INFO_IS_FOLDER),
					      error);
  if (!parent_folder)
    goto out;

  info = gtk_file_folder_get_info (parent_folder, parent_path ? path : NULL, error);
  g_object_unref (parent_folder);

 out:

  gtk_file_path_free (parent_path);
  return info;
}

/* Inserts a path in the shortcuts tree, making a copy of it; alternatively,
 * inserts a volume.  A position of -1 indicates the end of the tree.
 */
static gboolean
shortcuts_insert_path (GtkFileChooserDefault *impl,
		       int                    pos,
		       gboolean               is_volume,
		       GtkFileSystemVolume   *volume,
		       const GtkFilePath     *path,
		       const char            *label,
		       gboolean               removable,
		       GError               **error)
{
  char *label_copy;
  GdkPixbuf *pixbuf;
  gpointer data;
  GtkTreeIter iter;

  if (is_volume)
    {
      data = volume;
      label_copy = gtk_file_system_volume_get_display_name (impl->file_system, volume);
      pixbuf = gtk_file_system_volume_render_icon (impl->file_system, volume, GTK_WIDGET (impl),
						   impl->icon_size, NULL);
    }
  else
    {
      if (!check_is_folder (impl->file_system, path, error))
	return FALSE;