gtkplacessidebar.c 156 KB
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/*
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 *  GtkPlacesSidebar - sidebar widget for places in the filesystem
 *
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 *  This code comes from Nautilus, GNOME’s file manager.
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 *
 *  This library 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 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
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this library; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *  Authors : Mr Jamie McCracken (jamiemcc at blueyonder dot co dot uk)
 *            Cosimo Cecchi <cosimoc@gnome.org>
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 *            Federico Mena Quintero <federico@gnome.org>
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 *
 */
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/* TODO:
 *
 * * Fix instances of "#if 0"
 *
 * * Fix FIXMEs
 *
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 * * Grep for "NULL-GError" and see if they should be taken care of
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 *
 * * Although we do g_mount_unmount_with_operation(), Nautilus used to do
 *   nautilus_file_operations_unmount_mount_full() to unmount a volume.  With
 *   that, Nautilus does the "volume has trash, empty it first?" dance.  Cosimo
 *   suggests that this logic should be part of GtkMountOperation, which can
 *   have Unix-specific code for emptying trash.
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 *
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 * * Sync nautilus commit 17a85b78acc78b573c2e1776b348ed348e19adb7
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 *
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 */

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#include "config.h"
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#include <gio/gio.h>

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#include "gdk/gdkkeysyms.h"
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#include "gtkbookmarksmanager.h"
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#include "gtkcelllayout.h"
#include "gtkcellrenderertext.h"
#include "gtkcellrendererpixbuf.h"
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#include "gtkfilesystem.h"
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#include "gtkicontheme.h"
#include "gtkintl.h"
#include "gtkmain.h"
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#include "gtkmarshalers.h"
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#include "gtkmenuitem.h"
#include "gtkmountoperation.h"
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#include "gtkplacessidebar.h"
#include "gtkscrolledwindow.h"
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#include "gtkseparatormenuitem.h"
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#include "gtksettings.h"
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#include "gtktrashmonitor.h"
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#include "gtktreeselection.h"
#include "gtktreednd.h"
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#include "gtktypebuiltins.h"
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#include "gtkwindow.h"
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/**
 * SECTION:gtkplacessidebar
 * @Short_description: Sidebar that displays frequently-used places in the file system
 * @Title: GtkPlacesSidebar
 * @See_also: #GtkFileChooser
 *
 * #GtkPlacesSidebar is a widget that displays a list of frequently-used places in the
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 * file system:  the user’s home directory, the user’s bookmarks, and volumes and drives.
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 * This widget is used as a sidebar in #GtkFileChooser and may be used by file managers
 * and similar programs.
 *
 * The places sidebar displays drives and volumes, and will automatically mount
 * or unmount them when the user selects them.
 *
 * Applications can hook to various signals in the places sidebar to customize
 * its behavior.  For example, they can add extra commands to the context menu
 * of the sidebar.
 *
 * While bookmarks are completely in control of the user, the places sidebar also
 * allows individual applications to provide extra shortcut folders that are unique
 * to each application.  For example, a Paint program may want to add a shortcut
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 * for a Clipart folder.  You can do this with gtk_places_sidebar_add_shortcut().
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 *
 * To make use of the places sidebar, an application at least needs to connect
 * to the #GtkPlacesSidebar::open-location signal.  This is emitted when the
 * user selects in the sidebar a location to open.  The application should also
 * call gtk_places_sidebar_set_location() when it changes the currently-viewed
 * location.
 */

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#define EJECT_BUTTON_XPAD 8
#define ICON_CELL_XPAD 8
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#define TIMEOUT_EXPAND 500
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/* These are used when a destination-side DND operation is taking place.
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 * Normally, when a file is being hovered directly over a bookmark,
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 * we’ll be in DROP_STATE_NORMAL.
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 *
 * But when a file is being hovered between bookmarks, this means the user
 * may want to create a new bookmark for that file between those bookmarks.
 * In that case, the drop state will be *not* DROP_STATE_NORMAL.
 *
 * When the drop state is FADING_OUT, it means that the user is hovering
 * directly over an existing bookmark and an immediate drop will cause the
 * file being dragged to be dropped on the bookmark, instead of causing
 * a new bookmark to be created.
 */
typedef enum {
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  DROP_STATE_NORMAL,
  DROP_STATE_NEW_BOOKMARK_FADING_IN,
  DROP_STATE_NEW_BOOKMARK_ARMED,
  DROP_STATE_NEW_BOOKMARK_FADING_OUT
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} DropState;

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struct _GtkPlacesSidebar {
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  GtkScrolledWindow parent;
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  GtkTreeView       *tree_view;
  GtkCellRenderer   *eject_icon_cell_renderer;
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  GtkCellRenderer   *text_cell_renderer;
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  GtkListStore      *store;
  GtkBookmarksManager     *bookmarks_manager;
  GVolumeMonitor    *volume_monitor;
  GtkTrashMonitor   *trash_monitor;
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  GtkSettings       *gtk_settings;
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  GFile             *current_location;
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  gulong trash_monitor_changed_id;
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  gboolean devices_header_added;
  gboolean bookmarks_header_added;
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  /* DND */
  GList     *drag_list; /* list of GFile */
  gint       drag_data_info;
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  /* volume mounting - delayed open process */
  GtkPlacesOpenFlags go_to_after_mount_open_flags;
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  GCancellable *cancellable;
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  GtkWidget *popup_menu;
  GSList *shortcuts;
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  GDBusProxy *hostnamed_proxy;
  GCancellable *hostnamed_cancellable;
  gchar *hostname;
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  GtkPlacesOpenFlags open_flags;
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  DropState drop_state;
  gint new_bookmark_index;
  guint drag_leave_timeout_id;
  gchar *drop_target_uri;
  guint switch_location_timer;
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  guint mounting               : 1;
  guint  drag_data_received    : 1;
  guint drop_occured           : 1;
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  guint show_desktop_set       : 1;
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  guint show_desktop           : 1;
  guint show_connect_to_server : 1;
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  guint show_enter_location    : 1;
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  guint local_only             : 1;
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};
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struct _GtkPlacesSidebarClass {
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  GtkScrolledWindowClass parent;

  void    (* open_location)          (GtkPlacesSidebar   *sidebar,
                                      GFile              *location,
                                      GtkPlacesOpenFlags  open_flags);
  void    (* populate_popup)         (GtkPlacesSidebar   *sidebar,
                                      GtkMenu            *menu,
                                      GFile              *selected_item,
                                      GVolume            *selected_volume);
  void    (* show_error_message)     (GtkPlacesSidebar   *sidebar,
                                      const gchar        *primary,
                                      const gchar        *secondary);
  void    (* show_connect_to_server) (GtkPlacesSidebar   *sidebar);
  GdkDragAction (* drag_action_requested)  (GtkPlacesSidebar   *sidebar,
                                      GdkDragContext     *context,
                                      GFile              *dest_file,
                                      GList              *source_file_list);
  GdkDragAction (* drag_action_ask)  (GtkPlacesSidebar   *sidebar,
                                      GdkDragAction       actions);
  void    (* drag_perform_drop)      (GtkPlacesSidebar   *sidebar,
                                      GFile              *dest_file,
                                      GList              *source_file_list,
                                      GdkDragAction       action);
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  void    (* show_enter_location)    (GtkPlacesSidebar   *sidebar);
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};
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enum {
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  PLACES_SIDEBAR_COLUMN_ROW_TYPE,
  PLACES_SIDEBAR_COLUMN_URI,
  PLACES_SIDEBAR_COLUMN_DRIVE,
  PLACES_SIDEBAR_COLUMN_VOLUME,
  PLACES_SIDEBAR_COLUMN_MOUNT,
  PLACES_SIDEBAR_COLUMN_NAME,
  PLACES_SIDEBAR_COLUMN_GICON,
  PLACES_SIDEBAR_COLUMN_INDEX,
  PLACES_SIDEBAR_COLUMN_EJECT,
  PLACES_SIDEBAR_COLUMN_NO_EJECT,
  PLACES_SIDEBAR_COLUMN_BOOKMARK,
  PLACES_SIDEBAR_COLUMN_TOOLTIP,
  PLACES_SIDEBAR_COLUMN_SECTION_TYPE,
  PLACES_SIDEBAR_COLUMN_HEADING_TEXT,
  PLACES_SIDEBAR_COLUMN_COUNT
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};

typedef enum {
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  PLACES_BUILT_IN,
  PLACES_XDG_DIR,
  PLACES_MOUNTED_VOLUME,
  PLACES_BOOKMARK,
  PLACES_HEADING,
  PLACES_CONNECT_TO_SERVER,
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  PLACES_ENTER_LOCATION,
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  PLACES_DROP_FEEDBACK
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} PlaceType;

typedef enum {
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  SECTION_DEVICES,
  SECTION_BOOKMARKS,
  SECTION_COMPUTER,
  SECTION_NETWORK
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} SectionType;

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enum {
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  OPEN_LOCATION,
  POPULATE_POPUP,
  SHOW_ERROR_MESSAGE,
  SHOW_CONNECT_TO_SERVER,
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  SHOW_ENTER_LOCATION,
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  DRAG_ACTION_REQUESTED,
  DRAG_ACTION_ASK,
  DRAG_PERFORM_DROP,
  LAST_SIGNAL
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};

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enum {
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  PROP_LOCATION = 1,
  PROP_OPEN_FLAGS,
  PROP_SHOW_DESKTOP,
  PROP_SHOW_CONNECT_TO_SERVER,
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  PROP_SHOW_ENTER_LOCATION,
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  PROP_LOCAL_ONLY,
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  NUM_PROPERTIES
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};

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/* Names for themed icons */
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#define ICON_NAME_HOME     "user-home-symbolic"
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#define ICON_NAME_DESKTOP  "user-desktop-symbolic"
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#define ICON_NAME_FILESYSTEM     "drive-harddisk-symbolic"
#define ICON_NAME_EJECT    "media-eject-symbolic"
#define ICON_NAME_NETWORK  "network-workgroup-symbolic"
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#define ICON_NAME_NETWORK_SERVER "network-server-symbolic"
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#define ICON_NAME_FOLDER_NETWORK "folder-remote-symbolic"
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#define ICON_NAME_FOLDER                "folder-symbolic"
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#define ICON_NAME_FOLDER_DESKTOP  "user-desktop-symbolic"
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#define ICON_NAME_FOLDER_DOCUMENTS      "folder-documents-symbolic"
#define ICON_NAME_FOLDER_DOWNLOAD       "folder-download-symbolic"
#define ICON_NAME_FOLDER_MUSIC    "folder-music-symbolic"
#define ICON_NAME_FOLDER_PICTURES       "folder-pictures-symbolic"
#define ICON_NAME_FOLDER_PUBLIC_SHARE   "folder-publicshare-symbolic"
#define ICON_NAME_FOLDER_TEMPLATES      "folder-templates-symbolic"
#define ICON_NAME_FOLDER_VIDEOS   "folder-videos-symbolic"
#define ICON_NAME_FOLDER_SAVED_SEARCH   "folder-saved-search-symbolic"
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static guint places_sidebar_signals [LAST_SIGNAL] = { 0 };
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static GParamSpec *properties[NUM_PROPERTIES] = { NULL, };
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static void  open_selected_bookmark        (GtkPlacesSidebar   *sidebar,
                                            GtkTreeModel       *model,
                                            GtkTreeIter        *iter,
                                            GtkPlacesOpenFlags  open_flags);
static gboolean eject_or_unmount_bookmark  (GtkPlacesSidebar   *sidebar,
                                            GtkTreePath        *path);
static gboolean eject_or_unmount_selection (GtkPlacesSidebar   *sidebar);
static void  check_unmount_and_eject       (GMount             *mount,
                                            GVolume            *volume,
                                            GDrive             *drive,
                                            gboolean           *show_unmount,
                                            gboolean           *show_eject);
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/* Identifiers for target types */
enum {
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  GTK_TREE_MODEL_ROW,
  TEXT_URI_LIST
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};

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

/* Target types for dropping into the shortcuts list */
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static const GtkTargetEntry dnd_drop_targets [] = {
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  { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_WIDGET, GTK_TREE_MODEL_ROW }
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};

/* Drag and drop interface declarations */
typedef struct {
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  GtkListStore parent;
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  GtkPlacesSidebar *sidebar;
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} ShortcutsModel;
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typedef struct {
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  GtkListStoreClass parent_class;
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} ShortcutsModelClass;
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#define SHORTCUTS_MODEL_TYPE (shortcuts_model_get_type ())
#define SHORTCUTS_MODEL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), SHORTCUTS_MODEL_TYPE, ShortcutsModel))
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static GType shortcuts_model_get_type (void);
static void shortcuts_model_drag_source_iface_init (GtkTreeDragSourceIface *iface);
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G_DEFINE_TYPE_WITH_CODE (ShortcutsModel, shortcuts_model, GTK_TYPE_LIST_STORE,
                         G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_DRAG_SOURCE,
                                                shortcuts_model_drag_source_iface_init));
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static GtkListStore *shortcuts_model_new (GtkPlacesSidebar *sidebar);
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G_DEFINE_TYPE (GtkPlacesSidebar, gtk_places_sidebar, GTK_TYPE_SCROLLED_WINDOW);
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static void
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emit_open_location (GtkPlacesSidebar   *sidebar,
                    GFile              *location,
                    GtkPlacesOpenFlags  open_flags)
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{
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  if ((open_flags & sidebar->open_flags) == 0)
    open_flags = GTK_PLACES_OPEN_NORMAL;
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  g_signal_emit (sidebar, places_sidebar_signals[OPEN_LOCATION], 0,
                 location, open_flags);
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}

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static void
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emit_populate_popup (GtkPlacesSidebar *sidebar, 
                     GtkMenu          *menu,
                     GFile            *selected_item,
                     GVolume          *selected_volume)
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{
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  g_signal_emit (sidebar, places_sidebar_signals[POPULATE_POPUP], 0,
                 menu, selected_item, selected_volume);
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}

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static void
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emit_show_error_message (GtkPlacesSidebar *sidebar,
                         const gchar      *primary,
                         const gchar      *secondary)
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{
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  g_signal_emit (sidebar, places_sidebar_signals[SHOW_ERROR_MESSAGE], 0,
                 primary, secondary);
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}

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static void
emit_show_connect_to_server (GtkPlacesSidebar *sidebar)
{
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  g_signal_emit (sidebar, places_sidebar_signals[SHOW_CONNECT_TO_SERVER], 0);
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}

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static void
emit_show_enter_location (GtkPlacesSidebar *sidebar)
{
  g_signal_emit (sidebar, places_sidebar_signals[SHOW_ENTER_LOCATION], 0);
}

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static GdkDragAction
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emit_drag_action_requested (GtkPlacesSidebar *sidebar,
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                            GdkDragContext   *context,
                            GFile            *dest_file,
                            GList            *source_file_list)
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{
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  GdkDragAction ret_action = 0;
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  g_signal_emit (sidebar, places_sidebar_signals[DRAG_ACTION_REQUESTED], 0,
                 context, dest_file, source_file_list, &ret_action);
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  return ret_action;
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}

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static GdkDragAction
emit_drag_action_ask (GtkPlacesSidebar *sidebar,
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                      GdkDragAction     actions)
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{
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  GdkDragAction ret_action = 0;
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  g_signal_emit (sidebar, places_sidebar_signals[DRAG_ACTION_ASK], 0,
                 actions, &ret_action);
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  return ret_action;
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}

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static void
emit_drag_perform_drop (GtkPlacesSidebar *sidebar,
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                        GFile            *dest_file,
                        GList            *source_file_list,
                        GdkDragAction     action)
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{
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  g_signal_emit (sidebar, places_sidebar_signals[DRAG_PERFORM_DROP], 0,
                 dest_file, source_file_list, action);
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}

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static gint
get_icon_size (GtkPlacesSidebar *sidebar)
{
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  gint width, height;
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  if (gtk_icon_size_lookup (GTK_ICON_SIZE_MENU, &width, &height))
    return MAX (width, height);
  else
    return 16;
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}

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static GtkTreeIter
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add_heading (GtkPlacesSidebar *sidebar,
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             SectionType       section_type,
             const gchar      *title)
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{
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  GtkTreeIter iter;
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  gtk_list_store_append (sidebar->store, &iter);
  gtk_list_store_set (sidebar->store, &iter,
                      PLACES_SIDEBAR_COLUMN_ROW_TYPE, PLACES_HEADING,
                      PLACES_SIDEBAR_COLUMN_SECTION_TYPE, section_type,
                      PLACES_SIDEBAR_COLUMN_HEADING_TEXT, title,
                      PLACES_SIDEBAR_COLUMN_EJECT, FALSE,
                      PLACES_SIDEBAR_COLUMN_NO_EJECT, TRUE,
                      -1);
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  return iter;
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}

static void
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check_heading_for_section (GtkPlacesSidebar *sidebar,
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                           SectionType       section_type)
{
  switch (section_type)
    {
    case SECTION_DEVICES:
      if (!sidebar->devices_header_added)
        {
          add_heading (sidebar, SECTION_DEVICES, _("Devices"));
          sidebar->devices_header_added = TRUE;
        }
      break;

    case SECTION_BOOKMARKS:
      if (!sidebar->bookmarks_header_added)
        {
          add_heading (sidebar, SECTION_BOOKMARKS, _("Bookmarks"));
          sidebar->bookmarks_header_added = TRUE;
        }
      break;

    default:
      break;
  }
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}

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static void
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add_place (GtkPlacesSidebar *sidebar,
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           PlaceType         place_type,
           SectionType       section_type,
           const gchar      *name,
           GIcon            *icon,
           const gchar      *uri,
           GDrive           *drive,
           GVolume          *volume,
           GMount           *mount,
           const gint        index,
           const gchar      *tooltip)
{
  GtkTreeIter iter;
  gboolean show_eject, show_unmount;
  gboolean show_eject_button;

  check_heading_for_section (sidebar, section_type);

  check_unmount_and_eject (mount, volume, drive,
                           &show_unmount, &show_eject);

  if (show_unmount || show_eject)
    g_assert (place_type != PLACES_BOOKMARK);

  if (mount == NULL)
    show_eject_button = FALSE;
  else
    show_eject_button = (show_unmount || show_eject);

  gtk_list_store_append (sidebar->store, &iter);
  gtk_list_store_set (sidebar->store, &iter,
                      PLACES_SIDEBAR_COLUMN_GICON, icon,
                      PLACES_SIDEBAR_COLUMN_NAME, name,
                      PLACES_SIDEBAR_COLUMN_URI, uri,
                      PLACES_SIDEBAR_COLUMN_DRIVE, drive,
                      PLACES_SIDEBAR_COLUMN_VOLUME, volume,
                      PLACES_SIDEBAR_COLUMN_MOUNT, mount,
                      PLACES_SIDEBAR_COLUMN_ROW_TYPE, place_type,
                      PLACES_SIDEBAR_COLUMN_INDEX, index,
                      PLACES_SIDEBAR_COLUMN_EJECT, show_eject_button,
                      PLACES_SIDEBAR_COLUMN_NO_EJECT, !show_eject_button,
                      PLACES_SIDEBAR_COLUMN_BOOKMARK, place_type != PLACES_BOOKMARK,
                      PLACES_SIDEBAR_COLUMN_TOOLTIP, tooltip,
                      PLACES_SIDEBAR_COLUMN_SECTION_TYPE, section_type,
                      -1);
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}

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static GIcon *
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special_directory_get_gicon (GUserDirectory directory)
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{
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#define ICON_CASE(x)                      \
  case G_USER_DIRECTORY_ ## x:                                    \
          return g_themed_icon_new_with_default_fallbacks (ICON_NAME_FOLDER_ ## x);
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  switch (directory)
    {
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    ICON_CASE (DESKTOP);
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    ICON_CASE (DOCUMENTS);
    ICON_CASE (DOWNLOAD);
    ICON_CASE (MUSIC);
    ICON_CASE (PICTURES);
    ICON_CASE (PUBLIC_SHARE);
    ICON_CASE (TEMPLATES);
    ICON_CASE (VIDEOS);
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    default:
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      return g_themed_icon_new_with_default_fallbacks (ICON_NAME_FOLDER);
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    }
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#undef ICON_CASE
}

static gboolean
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recent_files_setting_is_enabled (GtkPlacesSidebar *sidebar)
{
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  GtkSettings *settings;
  gboolean enabled;

  if (gtk_widget_has_screen (GTK_WIDGET (sidebar)))
    settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (sidebar)));
  else
    settings = gtk_settings_get_default ();
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  g_object_get (settings, "gtk-recent-files-enabled", &enabled, NULL);
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  return enabled;
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}

static gboolean
recent_scheme_is_supported (void)
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{
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  const gchar * const *supported;
  gint i;
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  supported = g_vfs_get_supported_uri_schemes (g_vfs_get_default ());
  if (supported == NULL)
    return FALSE;
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  for (i = 0; supported[i] != NULL; i++)
    {
      if (strcmp ("recent", supported[i]) == 0)
        return TRUE;
    }

  return FALSE;
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}

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static gboolean
should_show_recent (GtkPlacesSidebar *sidebar)
{
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  return recent_files_setting_is_enabled (sidebar) && recent_scheme_is_supported ();
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}

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static gboolean
path_is_home_dir (const gchar *path)
{
  GFile *home_dir;
  GFile *location;
  const gchar *home_path;
  gboolean res;

  home_path = g_get_home_dir ();
  if (!home_path)
    return FALSE;

  home_dir = g_file_new_for_path (home_path);
  location = g_file_new_for_path (path);
  res = g_file_equal (home_dir, location);

  g_object_unref (home_dir);
  g_object_unref (location);

  return res;
}

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static void
open_home (GtkPlacesSidebar *sidebar)
{
  const gchar *home_path;
  GFile       *home_dir;

  home_path = g_get_home_dir ();
  if (!home_path)
    return;

  home_dir = g_file_new_for_path (home_path);
  emit_open_location (sidebar, home_dir, 0);

  g_object_unref (home_dir);
}

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static void
add_special_dirs (GtkPlacesSidebar *sidebar)
{
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  GList *dirs;
  gint index;

  dirs = NULL;
  for (index = 0; index < G_USER_N_DIRECTORIES; index++)
    {
      const gchar *path;
      GFile *root;
      GIcon *icon;
      gchar *name;
      gchar *mount_uri;
      gchar *tooltip;

      if (!_gtk_bookmarks_manager_get_is_xdg_dir_builtin (index))
        continue;

      path = g_get_user_special_dir (index);

      /* XDG resets special dirs to the home directory in case
       * it's not finiding what it expects. We don't want the home
       * to be added multiple times in that weird configuration.
       */
      if (path == NULL ||
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          path_is_home_dir (path) ||
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          g_list_find_custom (dirs, path, (GCompareFunc) g_strcmp0) != NULL)
        continue;
          

      root = g_file_new_for_path (path);

      name = _gtk_bookmarks_manager_get_bookmark_label (sidebar->bookmarks_manager, root);
      if (!name)
        name = g_file_get_basename (root);

      icon = special_directory_get_gicon (index);
      mount_uri = g_file_get_uri (root);
      tooltip = g_file_get_parse_name (root);

      add_place (sidebar, PLACES_XDG_DIR,
                 SECTION_COMPUTER,
                 name, icon, mount_uri,
                 NULL, NULL, NULL, 0,
                 tooltip);
      g_free (name);
      g_object_unref (root);
      g_object_unref (icon);
      g_free (mount_uri);
      g_free (tooltip);

      dirs = g_list_prepend (dirs, (gchar *)path);
    }

  g_list_free (dirs);
}

static gchar *
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get_home_directory_uri (void)
{
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  const gchar *home;
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  home = g_get_home_dir ();
  if (!home)
    return NULL;
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  return g_strconcat ("file://", home, NULL);
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}

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static gchar *
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get_desktop_directory_uri (void)
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{
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  const gchar *name;

  name = g_get_user_special_dir (G_USER_DIRECTORY_DESKTOP);

  /* "To disable a directory, point it to the homedir."
   * See http://freedesktop.org/wiki/Software/xdg-user-dirs
   */
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  if (path_is_home_dir (name))
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    return NULL;
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  return g_strconcat ("file://", name, NULL);
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}

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static gboolean
should_show_file (GtkPlacesSidebar *sidebar,
                  GFile            *file)
{
  gchar *path;

  if (!sidebar->local_only)
    return TRUE;

  path = g_file_get_path (file);
  if (path)
    {
      g_free (path);
      return TRUE;
    }

  return FALSE;
}

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static gboolean
file_is_shown (GtkPlacesSidebar *sidebar,
               GFile            *file)
{
  GtkTreeIter iter;
  gchar *uri;

  if (!gtk_tree_model_get_iter_first (GTK_TREE_MODEL (sidebar->store), &iter))
    return FALSE;

  do
    {
      gtk_tree_model_get (GTK_TREE_MODEL (sidebar->store), &iter,
                          PLACES_SIDEBAR_COLUMN_URI, &uri,
                          -1);
      if (uri)
        {
          GFile *other;
          gboolean found;
          other = g_file_new_for_uri (uri);
          g_free (uri);
          found = g_file_equal (file, other);
          g_object_unref (other);
          if (found)
            return TRUE;
        }
    }
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  while (gtk_tree_model_iter_next (GTK_TREE_MODEL (sidebar->store), &iter));
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  return FALSE;
}

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static void
on_app_shortcuts_query_complete (GObject      *source,
                                 GAsyncResult *result,
                                 gpointer      data)
{
  GtkPlacesSidebar *sidebar = data;
  GFile *file = G_FILE (source);
  GFileInfo *info;

  info = g_file_query_info_finish (file, result, NULL);

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  if (info)
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    {
      gchar *uri;
      gchar *tooltip;
      const gchar *name;
      GIcon *icon;
      int pos = 0;

      name = g_file_info_get_display_name (info);
      icon = g_file_info_get_symbolic_icon (info);
      uri = g_file_get_uri (file);
      tooltip = g_file_get_parse_name (file);

      /* XXX: we could avoid this by using an ancillary closure
       * with the index coming from add_application_shortcuts(),
       * but in terms of algorithmic overhead, the application
       * shortcuts is not going to be really big
       */
      pos = g_slist_index (sidebar->shortcuts, file);

      add_place (sidebar, PLACES_BUILT_IN,
                 SECTION_COMPUTER,
                 name, icon, uri,
                 NULL, NULL, NULL,
                 pos,
                 tooltip);

      g_free (uri);
      g_free (tooltip);

      g_object_unref (info);
    }
}

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static void
add_application_shortcuts (GtkPlacesSidebar *sidebar)
{
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  GSList *l;
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  for (l = sidebar->shortcuts; l; l = l->next)
    {
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      GFile *file = l->data;
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      if (!should_show_file (sidebar, file))
        continue;

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      if (file_is_shown (sidebar, file))
        continue;

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      g_file_query_info_async (file,
                               "standard::display-name,standard::symbolic-icon",
                               G_FILE_QUERY_INFO_NONE,
                               G_PRIORITY_DEFAULT,
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                               sidebar->cancellable,
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                               on_app_shortcuts_query_complete,
                               sidebar);
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    }
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}

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static gboolean
get_selected_iter (GtkPlacesSidebar *sidebar,
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                   GtkTreeIter      *iter)
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{
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  GtkTreeSelection *selection;
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  selection = gtk_tree_view_get_selection (sidebar->tree_view);
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  return gtk_tree_selection_get_selected (selection, NULL, iter);
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}

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typedef struct {
  GtkPlacesSidebar *sidebar;
  int index;
  gboolean is_native;
} BookmarkQueryClosure;

static void
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on_bookmark_query_info_complete (GObject      *source,
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                                 GAsyncResult *result,
                                 gpointer      data)
{
  BookmarkQueryClosure *clos = data;
  GtkPlacesSidebar *sidebar = clos->sidebar;
  GFile *root = G_FILE (source);
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  GError *error = NULL;
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  GFileInfo *info;
  gchar *bookmark_name;
  gchar *mount_uri;
  gchar *tooltip;
  GIcon *icon;

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  info = g_file_query_info_finish (root, result, &error);
  if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
    goto out;
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  bookmark_name = _gtk_bookmarks_manager_get_bookmark_label (sidebar->bookmarks_manager, root);
  if (bookmark_name == NULL && info != NULL)
    bookmark_name = g_strdup (g_file_info_get_display_name (info));
  else if (bookmark_name == NULL)
    {
      /* Don't add non-UTF-8 bookmarks */
      bookmark_name = g_file_get_basename (root);
      if (!g_utf8_validate (bookmark_name, -1, NULL))
        {
          g_free (bookmark_name);
          goto out;
        }
    }

  if (info)
    icon = g_object_ref (g_file_info_get_symbolic_icon (info));
  else
    icon = g_themed_icon_new_with_default_fallbacks (clos->is_native ? ICON_NAME_FOLDER : ICON_NAME_FOLDER_NETWORK);

  mount_uri = g_file_get_uri (root);
  tooltip = g_file_get_parse_name (root);

  add_place (sidebar, PLACES_BOOKMARK,
             SECTION_BOOKMARKS,
             bookmark_name, icon, mount_uri,
             NULL, NULL, NULL, clos->index,
             tooltip);

  g_free (mount_uri);
  g_free (tooltip);
  g_free (bookmark_name);
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  g_object_unref (icon);
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out:
  g_clear_object (&info);
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  g_clear_error (&error);
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  g_slice_free (BookmarkQueryClosure, clos);
}

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static void
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update_places (GtkPlacesSidebar *sidebar)
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{
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  GtkTreeIter iter;
  GVolumeMonitor *volume_monitor;
  GList *mounts, *l, *ll;
  GMount *mount;
  GList *drives;
  GDrive *drive;
  GList *volumes;
  GVolume *volume;
  GSList *bookmarks, *sl;
  gint index;
  gchar *original_uri, *mount_uri, *name, *identifier;
  gchar *home_uri;
  GIcon *icon;
  GFile *root;
  gchar *tooltip;
  GList *network_mounts, *network_volumes;

  /* save original selection */
  if (get_selected_iter (sidebar, &iter))
    gtk_tree_model_get (GTK_TREE_MODEL (sidebar->store),
                        &iter,
                        PLACES_SIDEBAR_COLUMN_URI, &original_uri, -1);
  else
    original_uri = NULL;

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  g_cancellable_cancel (sidebar->cancellable);

  g_object_unref (sidebar->cancellable);
  sidebar->cancellable = g_cancellable_new ();

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  gtk_list_store_clear (sidebar->store);

  sidebar->devices_header_added = FALSE;
  sidebar->bookmarks_header_added = FALSE;

  network_mounts = network_volumes = NULL;
  volume_monitor = sidebar->volume_monitor;

  /* add built-in bookmarks */

  if (should_show_recent (sidebar))
    {
      mount_uri = "recent:///";
      icon = g_themed_icon_new_with_default_fallbacks ("document-open-recent-symbolic");
      add_place (sidebar, PLACES_BUILT_IN,
                 SECTION_COMPUTER,
                 _("Recent"), icon, mount_uri,
                 NULL, NULL, NULL, 0,
                 _("Recent files"));
      g_object_unref (icon);
    }

  /* home folder */
  home_uri = get_home_directory_uri ();
  icon = g_themed_icon_new_with_default_fallbacks (ICON_NAME_HOME);
  add_place (sidebar, PLACES_BUILT_IN,
             SECTION_COMPUTER,
             _("Home"), icon, home_uri,
             NULL, NULL, NULL, 0,
             _("Open your personal folder"));
  g_object_unref (icon);
  g_free (home_uri);

  /* desktop */
  if (sidebar->show_desktop)
    {
      mount_uri = get_desktop_directory_uri ();
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      if (mount_uri)
        {
          icon = g_themed_icon_new_with_default_fallbacks (ICON_NAME_DESKTOP);
          add_place (sidebar, PLACES_BUILT_IN,
                     SECTION_COMPUTER,
                     _("Desktop"), icon, mount_uri,
                     NULL, NULL, NULL, 0,
                     _("Open the contents of your desktop in a folder"));
          g_object_unref (icon);
          g_free (mount_uri);
        }
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    }

  /* XDG directories */
  add_special_dirs (sidebar);

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  if (sidebar->show_enter_location)
    {
      icon = g_themed_icon_new_with_default_fallbacks (ICON_NAME_NETWORK_SERVER);
      add_place (sidebar, PLACES_ENTER_LOCATION,
                 SECTION_COMPUTER,
                 _("Enter Location"), icon, NULL,
                 NULL, NULL, NULL, 0,
                 _("Manually enter a location"));
      g_object_unref (icon);
    }

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  /* Trash */
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  if (!sidebar->local_only)
    {
      mount_uri = "trash:///"; /* No need to strdup */
      icon = _gtk_trash_monitor_get_icon (sidebar->trash_monitor);
      add_place (sidebar, PLACES_BUILT_IN,
                 SECTION_COMPUTER,
                 _("Trash"), icon, mount_uri,
                 NULL, NULL, NULL, 0,
                 _("Open the trash"));
      g_object_unref (icon);
    }
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  /* Application-side shortcuts */
  add_application_shortcuts (sidebar);

  /* go through all connected drives */
  drives = g_volume_monitor_get_connected_drives (volume_monitor);

  for (l = drives; l != NULL; l = l->next)
    {
      drive = l->data;

      volumes = g_drive_get_volumes (drive);
      if (volumes != NULL)
        {
          for (ll = volumes; ll != NULL; ll = ll->next)
            {
              volume = ll->data;
              identifier = g_volume_get_identifier (volume, G_VOLUME_IDENTIFIER_KIND_CLASS);

              if (g_strcmp0 (identifier, "network") == 0)
                {
                  g_free (identifier);
                  network_volumes = g_list_prepend (network_volumes, volume);
                  continue;
                }
              g_free (identifier);

              mount = g_volume_get_mount (volume);
              if (mount != NULL)
                {
                  /* Show mounted volume in the sidebar */
                  icon = g_mount_get_symbolic_icon (mount);
                  root = g_mount_get_default_location (mount);
                  mount_uri = g_file_get_uri (root);
                  name = g_mount_get_name (mount);
                  tooltip = g_file_get_parse_name (root);

                  add_place (sidebar, PLACES_MOUNTED_VOLUME,
                             SECTION_DEVICES,
                             name, icon, mount_uri,
                             drive, volume, mount, 0, tooltip);
                  g_object_unref (root);
                  g_object_unref (mount);
                  g_object_unref (icon);
                  g_free (tooltip);
                  g_free (name);
                  g_free (mount_uri);
                }
              else
                {
                  /* Do show the unmounted volumes in the sidebar;
                   * this is so the user can mount it (in case automounting
                   * is off).
                   *
                   * Also, even if automounting is enabled, this gives a visual
                   * cue that the user should remember to yank out the media if
                   * he just unmounted it.
                   */
                  icon = g_volume_get_symbolic_icon (volume);
                  name = g_volume_get_name (volume);
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                  tooltip = g_strdup_printf (_("Mount and open “%s”"), name);
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                  add_place (sidebar, PLACES_MOUNTED_VOLUME,
                             SECTION_DEVICES,
                             name, icon, NULL,
                             drive, volume, NULL, 0, tooltip);
                  g_object_unref (icon);
                  g_free (name);
                  g_free (tooltip);
                }
              g_object_unref (volume);
            }
          g_list_free (volumes);
        }
      else
        {
          if (g_drive_is_media_removable (drive) && !g_drive_is_media_check_automatic (drive))
            {
              /* If the drive has no mountable volumes and we cannot detect media change.. we
               * display the drive in the sidebar so the user can manually poll the drive by
               * right clicking and selecting "Rescan..."
               *
               * This is mainly for drives like floppies where media detection doesn't
               * work.. but it's also for human beings who like to turn off media detection
               * in the OS to save battery juice.
               */
              icon = g_drive_get_symbolic_icon (drive);
              name = g_drive_get_name (drive);
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              tooltip = g_strdup_printf (_("Mount and open “%s”"), name);
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              add_place (sidebar, PLACES_BUILT_IN,
                         SECTION_DEVICES,
                         name, icon, NULL,
                         drive, NULL, NULL, 0, tooltip);
              g_object_unref (icon);
              g_free (tooltip);
              g_free (name);
            }
        }
      g_object_unref (drive);
    }
  g_list_free (drives);

  /* add all volumes that is not associated with a drive */
  volumes = g_volume_monitor_get_volumes (volume_monitor);
  for (l = volumes; l != NULL; l = l->next)
    {
      volume = l->data;
      drive = g_volume_get_drive (volume);
      if (drive != NULL)
        {
          g_object_unref (volume);
          g_object_unref (drive);
          continue;
        }

      identifier = g_volume_get_identifier (volume, G_VOLUME_IDENTIFIER_KIND_CLASS);

      if (g_strcmp0 (identifier, "network") == 0)
        {
          g_free (identifier);
          network_volumes = g_list_prepend (network_volumes, volume);
          continue;
        }
      g_free (identifier);

      mount = g_volume_get_mount (volume);
      if (mount != NULL)
        {
          icon = g_mount_get_symbolic_icon (mount);
          root = g_mount_get_default_location (mount);
          mount_uri = g_file_get_uri (root);
          tooltip = g_file_get_parse_name (root);
          name = g_mount_get_name (mount);
          add_place (sidebar, PLACES_MOUNTED_VOLUME,
                     SECTION_DEVICES,
                     name, icon, mount_uri,
                     NULL, volume, mount, 0, tooltip);
          g_object_unref (mount);
          g_object_unref (root);
          g_object_unref (icon);
          g_free (name);
          g_free (tooltip);
          g_free (mount_uri);
        }
      else
        {
          /* see comment above in why we add an icon for an unmounted mountable volume */
          icon = g_volume_get_symbolic_icon (volume);
          name = g_volume_get_name (volume);
          add_place (sidebar, PLACES_MOUNTED_VOLUME,
                     SECTION_DEVICES,
                     name, icon, NULL,
                     NULL, volume, NULL, 0, name);
          g_object_unref (icon);
          g_free (name);
        } 
      g_object_unref (volume);
    }
  g_list_free (volumes);

  /* file system root */

  mount_uri = "file:///"; /* No need to strdup */
  icon = g_themed_icon_new_with_default_fallbacks (ICON_NAME_FILESYSTEM);
  add_place (sidebar, PLACES_BUILT_IN,
             SECTION_DEVICES,
             sidebar->hostname, icon, mount_uri,
             NULL, NULL, NULL, 0,
             _("Open the contents of the file system"));
  g_object_unref (icon);

  /* add mounts that has no volume (/etc/mtab mounts, ftp, sftp,...) */
  mounts = g_volume_monitor_get_mounts (volume_monitor);

  for (l = mounts; l != NULL; l = l->next)
    {
      mount = l->data;
      if (g_mount_is_shadowed (mount))
        {
          g_object_unref (mount);
          continue;
        }
      volume = g_mount_get_volume (mount);
      if (volume != NULL)
        {
          g_object_unref (volume);
          g_object_unref (mount);
          continue;
        }
      root = g_mount_get_default_location (mount);

      if (!g_file_is_native (root))
        {
          network_mounts = g_list_prepend (network_mounts, mount);
          g_object_unref (root);
          continue;
        }

      icon = g_mount_get_symbolic_icon (mount);
      mount_uri = g_file_get_uri (root);
      name = g_mount_get_name (mount);
      tooltip = g_file_get_parse_name (root);
      add_place (sidebar, PLACES_MOUNTED_VOLUME,
                 SECTION_COMPUTER,
                 name, icon, mount_uri,
                 NULL, NULL, mount, 0, tooltip);
      g_object_unref (root);
      g_object_unref (mount);
      g_object_unref (icon);
      g_free (name);
      g_free (mount_uri);
      g_free (tooltip);
    }
  g_list_free (mounts);

  /* add bookmarks */

  bookmarks = _gtk_bookmarks_manager_list_bookmarks (sidebar->bookmarks_manager);

  for (sl = bookmarks, index = 0; sl; sl = sl->next, index++)
    {
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      gboolean is_native;
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      BookmarkQueryClosure *clos;
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      root = sl->data;
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      is_native = g_file_is_native (root);
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#if 0
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      /* FIXME: remove this?  If we *do* show bookmarks for nonexistent files, the user will eventually clean them up */
      if (!nautilus_bookmark_get_exists (bookmark))
        continue;
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#endif
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      if (_gtk_bookmarks_manager_get_is_builtin (sidebar->bookmarks_manager, root))
        continue;

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      if (sidebar->local_only && !is_native)
        continue;

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      clos = g_slice_new (BookmarkQueryClosure);
      clos->sidebar = sidebar;
      clos->index = index;
      clos->is_native = is_native;
      g_file_query_info_async (root,
                               "standard::display-name,standard::symbolic-icon",
                               G_FILE_QUERY_INFO_NONE,
                               G_PRIORITY_DEFAULT,
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                               sidebar->cancellable,
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                               on_bookmark_query_info_complete,
                               clos);
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    }

  g_slist_foreach (bookmarks, (GFunc) g_object_unref, NULL);
  g_slist_free (bookmarks);

  /* network */
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  if (!sidebar->local_only)
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    {
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      add_heading (sidebar, SECTION_NETWORK, _("Network"));

      mount_uri = "network:///";
      icon = g_themed_icon_new_with_default_fallbacks (ICON_NAME_NETWORK);
      add_place (sidebar, PLACES_BUILT_IN,
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                 SECTION_NETWORK,
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                 _("Browse Network"), icon, mount_uri,
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                 NULL, NULL, NULL, 0,
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                 _("Browse the contents of the network"));
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      g_object_unref (icon);

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      if (sidebar->show_connect_to_server)
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        {
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          icon = g_themed_icon_new_with_default_fallbacks (ICON_NAME_NETWORK_SERVER);
          add_place (sidebar, PLACES_CONNECT_TO_SERVER,
                     SECTION_NETWORK,
                     _("Connect to Server"), icon, NULL,
                     NULL, NULL, NULL, 0,
                     _("Connect to a network server address"));
          g_object_unref (icon);
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        }
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      network_volumes = g_list_reverse (network_volumes);
      for (l = network_volumes; l != NULL; l = l->next)
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        {
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          volume = l->data;
          mount = g_volume_get_mount (volume);

          if (mount != NULL)
            {
              network_mounts = g_list_prepend (network_mounts, mount);
              continue;
            }
          else
            {
              icon = g_volume_get_symbolic_icon (volume);
              name = g_volume_get_name (volume);
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              tooltip = g_strdup_printf (_("Mount and open “%s”"), name);
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              add_place (sidebar, PLACES_MOUNTED_VOLUME,
                         SECTION_NETWORK,
                         name, icon, NULL,
                         NULL, volume, NULL, 0, tooltip);
              g_object_unref (icon);
              g_free (name);
              g_free (tooltip);
            }
        }

      network_mounts = g_list_reverse (network_mounts);
      for (l = network_mounts; l != NULL; l = l->next)
        {
          mount = l->data;
          root = g_mount_get_default_location (mount);
          icon = g_mount_get_symbolic_icon (mount);
          mount_uri = g_file_get_uri (root);
          name = g_mount_get_name (mount);
          tooltip = g_file_get_parse_name (root);
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          add_place (sidebar, PLACES_MOUNTED_VOLUME,
                     SECTION_NETWORK,
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                     name, icon, mount_uri,
                     NULL, NULL, mount, 0, tooltip);
          g_object_unref (root);
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          g_object_unref (icon);
          g_free (name);
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          g_free (mount_uri);
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          g_free (tooltip);
        }
    }

  g_list_free_full (network_volumes, g_object_unref);
  g_list_free_full (network_mounts, g_object_unref);

  /* restore original selection */
  if (original_uri)
    {
      GFile *restore;

      restore = g_file_new_for_uri (original_uri);
      gtk_places_sidebar_set_location (sidebar, restore);
      g_object_unref (restore);

      g_free (original_uri);
    }
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}

static gboolean
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over_eject_button (GtkPlacesSidebar  *sidebar,
                   gint               x,
                   gint               y,
                   GtkTreePath      **path)
{
  GtkTreeViewColumn *column;
  gint width, x_offset, hseparator;
  gint eject_button_size;
  gboolean show_eject;
  GtkTreeIter iter;
  GtkTreeModel *model;

  *path = NULL;
  model = gtk_tree_view_get_model (sidebar->tree_view);

  if (gtk_tree_view_get_path_at_pos (sidebar->tree_view,
                                     x, y, path, &column, NULL, NULL))
    {
      gtk_tree_model_get_iter (model, &iter, *path);
      gtk_tree_model_get (model, &iter,
                          PLACES_SIDEBAR_COLUMN_EJECT, &show_eject,
                          -1);

      if (!show_eject)
        goto out;

      gtk_widget_style_get (GTK_WIDGET (sidebar->tree_view),
                            "horizontal-separator", &hseparator,
                            NULL);

      /* Reload cell attributes for this particular row */
      gtk_tree_view_column_cell_set_cell_data (column,
                                               model, &iter, FALSE, FALSE);

      gtk_tree_view_column_cell_get_position (column,
                                              sidebar->eject_icon_cell_renderer,
                                              &x_offset, &width);

      eject_button_size = get_icon_size (sidebar);

      /* This is kinda weird, but we have to do it to workaround expanding
       * the eject cell renderer (even thought we told it not to) and we
       * then had to set it right-aligned
       */
      x_offset += width - hseparator - EJECT_BUTTON_XPAD - eject_button_size;

      if (x - x_offset >= 0 && x - x_offset <= eject_button_size)
        return TRUE;
    }
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 out:
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  g_clear_pointer (path, gtk_tree_path_free);
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  return FALSE;
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}

static gboolean
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clicked_eject_button (GtkPlacesSidebar  *sidebar,
                      GtkTreePath      **path)
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{
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  GdkEvent *event;
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  event = gtk_get_current_event ();

  if (event &&
      (event->type == GDK_BUTTON_PRESS || event->type == GDK_BUTTON_RELEASE) &&
       over_eject_button (sidebar, ((GdkEventButton *)event)->x, ((GdkEventButton *)event)->y, path))
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    return TRUE;
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  return FALSE;
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}

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static gboolean
pos_is_into_or_before (GtkTreeViewDropPosition pos)
{
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  return (pos == GTK_TREE_VIEW_DROP_BEFORE || pos == GTK_TREE_VIEW_DROP_INTO_OR_BEFORE);
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}

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/* Computes the appropriate row and position for dropping */
static gboolean
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compute_drop_position (GtkTreeView              *tree_view,
                       gint                      x,
                       gint                      y,
                       GtkTreePath             **path,
                       GtkTreeViewDropPosition  *pos,
                       GtkPlacesSidebar         *sidebar)
{
  GtkTreeModel *model;
  GtkTreeIter iter;
  PlaceType place_type;
  SectionType section_type;
  gboolean drop_possible;

  if (!gtk_tree_view_get_dest_row_at_pos (tree_view, x, y, path, pos))
    return FALSE;

  model = gtk_tree_view_get_model (tree_view);

  gtk_tree_model_get_iter (model, &iter, *path);
  gtk_tree_model_get (model, &iter,
                      PLACES_SIDEBAR_COLUMN_ROW_TYPE, &place_type,
                      PLACES_SIDEBAR_COLUMN_SECTION_TYPE, &section_type,
                      -1);

  drop_possible = TRUE;

  /* Normalize drops on the feedback row */
  if (place_type == PLACES_DROP_FEEDBACK)
    {
      *pos = GTK_TREE_VIEW_DROP_INTO_OR_BEFORE;
      goto out;
    }

  /* Never drop on headings, but special case the bookmarks heading,
   * so we can drop bookmarks in between it and the first bookmark.
   */
  if (place_type == PLACES_HEADING && section_type != SECTION_BOOKMARKS)
    drop_possible = FALSE;

  /* Dragging a bookmark? */
  if (sidebar->drag_data_received &&
      sidebar->drag_data_info == GTK_TREE_MODEL_ROW)
    {
      /* Don't allow reordering bookmarks into non-bookmark areas */
      if (section_type != SECTION_BOOKMARKS)
        drop_possible = FALSE;

      /* Bookmarks can only be reordered.  Disallow dropping directly
       * into them; only allow dropping between them.
       */
      if (place_type == PLACES_HEADING)
        {
          if (pos_is_into_or_before (*pos))
            drop_possible = FALSE;
          else
            *pos = GTK_TREE_VIEW_DROP_AFTER;
        }
      else
        {
          if (pos_is_into_or_before (*pos))
            *pos = GTK_TREE_VIEW_DROP_BEFORE;
          else
            *pos = GTK_TREE_VIEW_DROP_AFTER;
        }
    }
  else
    { 
      /* Dragging a file */

      /* Outside the bookmarks section, URIs can only be dropped
       * directly into places items.  Inside the bookmarks section,
       * they can be dropped between items (to create new bookmarks)
       * or in items themselves (to request a move/copy file
       * operation).
       */
      if (section_type != SECTION_BOOKMARKS)
        *pos = GTK_TREE_VIEW_DROP_INTO_OR_BEFORE;
      else
        {
          if (place_type == PLACES_HEADING)
            {
              if (pos_is_into_or_before (*pos))
                drop_possible = FALSE;
              else
                *pos = GTK_TREE_VIEW_DROP_AFTER;
            }
        }
    }

  /* Disallow drops on recent:/// */
  if (place_type == PLACES_BUILT_IN)
    {
      gchar *uri;

      gtk_tree_model_get (model, &iter,
                          PLACES_SIDEBAR_COLUMN_URI, &uri,
                          -1);

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      if (g_strcmp0 (uri, "recent:///") == 0)
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        drop_possible = FALSE;

      g_free (uri);
    }
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out:

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  if (!drop_possible)
    {
      gtk_tree_path_free (*path);
      *path = NULL;
      return FALSE;
    }
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  return TRUE;
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}

static gboolean
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get_drag_data (GtkTreeView    *tree_view,
               GdkDragContext *context,
               guint           time)
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{
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  GdkAtom target;
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  target = gtk_drag_dest_find_target (GTK_WIDGET (tree_view),
                                      context,
                                      NULL);
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  if (target == GDK_NONE)
    return FALSE;
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  gtk_drag_get_data (GTK_WIDGET (tree_view),
                     context, target, time);
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  return TRUE;
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}

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static void
remove_switch_location_timer (GtkPlacesSidebar *sidebar)
{
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  if (sidebar->switch_location_timer != 0)
    {
      g_source_remove (sidebar->switch_location_timer);
      sidebar->switch_location_timer = 0;
    }
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}

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static void
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free_drag_data (GtkPlacesSidebar *sidebar)
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{
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  sidebar->drag_data_received = FALSE;
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  if (sidebar->drag_list)
    {
      g_list_free_full (sidebar->drag_list, g_object_unref);
      sidebar->drag_list = NULL;
    }
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  remove_switch_location_timer (sidebar);
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  g_free (sidebar->drop_target_uri);
  sidebar->drop_target_uri = NULL;
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}

static gboolean
switch_location_timer (gpointer user_data)
{
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  GtkPlacesSidebar *sidebar = GTK_PLACES_SIDEBAR (user_data);
  GFile *location;
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  sidebar->switch_location_timer = 0;
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  location = g_file_new_for_uri (sidebar->drop_target_uri);
  emit_open_location (sidebar, location, 0);
  g_object_unref (location);
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  return FALSE;
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}

static void
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check_switch_location_timer (GtkPlacesSidebar *sidebar,
                             const gchar      *uri)
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{
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  if (g_strcmp0 (uri, sidebar->drop_target_uri) == 0)
    return;

  remove_switch_location_timer (sidebar);
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  g_free (sidebar->drop_target_uri);
  sidebar->drop_target_uri = NULL;
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  if (uri != NULL)
    {
      sidebar->drop_target_uri = g_strdup (uri);
      sidebar->switch_location_timer = gdk_threads_add_timeout (TIMEOUT_EXPAND, switch_location_timer, sidebar);
      g_source_set_name_by_id (sidebar->switch_location_timer, "[gtk+] switch_location_timer");
    }
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}

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static void
remove_drop_bookmark_feedback_row (GtkPlacesSidebar *sidebar)
{
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  if (sidebar->drop_state != DROP_STATE_NORMAL)
    {
      gboolean success;
      GtkTreeIter iter;
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      success = gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (sidebar->store), &iter, NULL, sidebar->new_bookmark_index);
      g_assert (success);
      gtk_list_store_remove (sidebar->store, &iter);
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      sidebar->drop_state = DROP_STATE_NORMAL;
    }
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}

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static void
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