/* fm-canvas-view.c - implementation of canvas view of directory.
 *
 *  Copyright (C) 2000, 2001 Eazel, Inc.
 *
 *  The Gnome Library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public License as
 *  published by the Free Software Foundation; either version 2 of the
 *  License, or (at your option) any later version.
 *
 *  The Gnome 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along with the Gnome Library; see the file COPYING.LIB.  If not,
 *  see <http://www.gnu.org/licenses/>.
 *
 *  Authors: John Sullivan <sullivan@eazel.com>
 */

#include <config.h>

#include "nautilus-canvas-view.h"

#include "nautilus-canvas-view-container.h"
#include "nautilus-error-reporting.h"
#include "nautilus-files-view-dnd.h"
#include "nautilus-toolbar.h"
#include "nautilus-view.h"

#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include <gio/gio.h>
#include "nautilus-directory.h"
#include "nautilus-dnd.h"
#include "nautilus-file-utilities.h"
#include "nautilus-ui-utilities.h"
#include "nautilus-global-preferences.h"
#include "nautilus-canvas-container.h"
#include "nautilus-canvas-dnd.h"
#include "nautilus-metadata.h"
#include "nautilus-clipboard.h"

#define DEBUG_FLAG NAUTILUS_DEBUG_CANVAS_VIEW
#include "nautilus-debug.h"

#include <locale.h>
#include <signal.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

typedef gboolean (*SortCriterionMatchFunc) (NautilusFile *file);

typedef struct
{
    const NautilusFileSortType sort_type;
    const char *metadata_text;
    const char *action_target_name;
    const gboolean reverse_order;
    SortCriterionMatchFunc match_func;
} SortCriterion;

typedef enum
{
    MENU_ITEM_TYPE_STANDARD,
    MENU_ITEM_TYPE_CHECK,
    MENU_ITEM_TYPE_RADIO,
    MENU_ITEM_TYPE_TREE
} MenuItemType;

struct _NautilusCanvasView
{
    NautilusFilesView parent_instance;

    GList *icons_not_positioned;

    guint react_to_canvas_change_idle_id;

    const SortCriterion *sort;

    GtkWidget *canvas_container;

    /* FIXME: Needed for async operations. Suposedly we would use cancellable and gtask,
     * sadly gtkclipboard doesn't support that.
     * We follow this pattern for checking validity of the object in the views.
     * Ideally we would connect to a weak reference and do a cancellable.
     */
    gboolean destroyed;
};

/* Note that the first item in this list is the default sort,
 * and that the items show up in the menu in the order they
 * appear in this list.
 */
static const SortCriterion sort_criteria[] =
{
    {
        NAUTILUS_FILE_SORT_BY_DISPLAY_NAME,
        "name",
        "name",
        FALSE
    },
    {
        NAUTILUS_FILE_SORT_BY_DISPLAY_NAME,
        "name",
        "name-desc",
        TRUE
    },
    {
        NAUTILUS_FILE_SORT_BY_SIZE,
        "size",
        "size",
        TRUE
    },
    {
        NAUTILUS_FILE_SORT_BY_TYPE,
        "type",
        "type",
        FALSE
    },
    {
        NAUTILUS_FILE_SORT_BY_MTIME,
        "modification date",
        "modification-date",
        FALSE
    },
    {
        NAUTILUS_FILE_SORT_BY_MTIME,
        "modification date",
        "modification-date-desc",
        TRUE
    },
    {
        NAUTILUS_FILE_SORT_BY_ATIME,
        "access date",
        "access-date",
        FALSE
    },
    {
        NAUTILUS_FILE_SORT_BY_ATIME,
        "access date",
        "access-date-desc",
        TRUE
    },
    {
        NAUTILUS_FILE_SORT_BY_TRASHED_TIME,
        "trashed",
        "trash-time",
        TRUE,
        nautilus_file_is_in_trash
    },
    {
        NAUTILUS_FILE_SORT_BY_SEARCH_RELEVANCE,
        NULL,
        "search-relevance",
        TRUE,
        nautilus_file_is_in_search
    },
    {
        NAUTILUS_FILE_SORT_BY_RECENCY,
        NULL,
        "recency",
        TRUE,
        nautilus_file_is_in_recent
    }
};

G_DEFINE_TYPE (NautilusCanvasView, nautilus_canvas_view, NAUTILUS_TYPE_FILES_VIEW);

static void                 nautilus_canvas_view_set_directory_sort_by (NautilusCanvasView  *canvas_view,
                                                                        NautilusFile        *file,
                                                                        const SortCriterion *sort);
static void                 nautilus_canvas_view_update_click_mode (NautilusCanvasView *canvas_view);
static void                 nautilus_canvas_view_reveal_selection (NautilusFilesView *view);
static const SortCriterion *get_sort_criterion_by_metadata_text (const char *metadata_text,
                                                                 gboolean    reversed);
static const SortCriterion *get_sort_criterion_by_sort_type (NautilusFileSortType sort_type,
                                                             gboolean             reversed);
static const SortCriterion *get_default_sort_order (NautilusFile *file);
static void                 nautilus_canvas_view_clear (NautilusFilesView *view);
static void on_clipboard_owner_changed (GtkClipboard *clipboard,
                                        GdkEvent     *event,
                                        gpointer      user_data);

static void
nautilus_canvas_view_destroy (GtkWidget *object)
{
    NautilusCanvasView *canvas_view;
    GtkClipboard *clipboard;

    canvas_view = NAUTILUS_CANVAS_VIEW (object);

    nautilus_canvas_view_clear (NAUTILUS_FILES_VIEW (object));

    if (canvas_view->react_to_canvas_change_idle_id != 0)
    {
        g_source_remove (canvas_view->react_to_canvas_change_idle_id);
        canvas_view->react_to_canvas_change_idle_id = 0;
    }

    clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
    g_signal_handlers_disconnect_by_func (clipboard,
                                          on_clipboard_owner_changed,
                                          canvas_view);

    if (canvas_view->icons_not_positioned)
    {
        nautilus_file_list_free (canvas_view->icons_not_positioned);
        canvas_view->icons_not_positioned = NULL;
    }

    GTK_WIDGET_CLASS (nautilus_canvas_view_parent_class)->destroy (object);
}

static NautilusCanvasContainer *
get_canvas_container (NautilusCanvasView *canvas_view)
{
    return NAUTILUS_CANVAS_CONTAINER (canvas_view->canvas_container);
}

NautilusCanvasContainer *
nautilus_canvas_view_get_canvas_container (NautilusCanvasView *canvas_view)
{
    return get_canvas_container (canvas_view);
}

static void
update_sort_criterion (NautilusCanvasView  *canvas_view,
                       const SortCriterion *sort,
                       gboolean             set_metadata)
{
    NautilusFile *file;
    const SortCriterion *overrided_sort_criterion;

    file = nautilus_files_view_get_directory_as_file (NAUTILUS_FILES_VIEW (canvas_view));

    /* Make sure we use the default one and not one that the user used previously
     * of the change to not allow sorting on search and recent, or the
     * case that the user or some app modified directly the metadata */
    if (nautilus_file_is_in_search (file) || nautilus_file_is_in_recent (file))
    {
        overrided_sort_criterion = get_default_sort_order (file);
    }
    else if (sort != NULL && canvas_view->sort != sort)
    {
        overrided_sort_criterion = sort;
        if (set_metadata)
        {
            /* Store the new sort setting. */
            nautilus_canvas_view_set_directory_sort_by (canvas_view,
                                                        file,
                                                        sort);
        }
    }
    else
    {
        return;
    }

    canvas_view->sort = overrided_sort_criterion;
}

static void
list_covers (NautilusCanvasIconData *data,
             gpointer                callback_data)
{
    GSList **file_list;

    file_list = callback_data;

    *file_list = g_slist_prepend (*file_list, data);
}

static void
unref_cover (NautilusCanvasIconData *data,
             gpointer                callback_data)
{
    nautilus_file_unref (NAUTILUS_FILE (data));
}

static void
nautilus_canvas_view_clear (NautilusFilesView *view)
{
    NautilusCanvasContainer *canvas_container;
    GSList *file_list;

    g_return_if_fail (NAUTILUS_IS_CANVAS_VIEW (view));

    canvas_container = get_canvas_container (NAUTILUS_CANVAS_VIEW (view));
    if (!canvas_container)
    {
        return;
    }

    /* Clear away the existing icons. */
    file_list = NULL;
    nautilus_canvas_container_for_each (canvas_container, list_covers, &file_list);
    nautilus_canvas_container_clear (canvas_container);
    g_slist_foreach (file_list, (GFunc) unref_cover, NULL);
    g_slist_free (file_list);
}

static void
nautilus_canvas_view_remove_file (NautilusFilesView *view,
                                  NautilusFile      *file,
                                  NautilusDirectory *directory)
{
    NautilusCanvasView *canvas_view;

    /* This used to assert that 'directory == nautilus_files_view_get_model (view)', but that
     * resulted in a lot of crash reports (bug #352592). I don't see how that trace happens.
     * It seems that somehow we get a files_changed event sent to the view from a directory
     * that isn't the model, but the code disables the monitor and signal callback handlers when
     * changing directories. Maybe we can get some more information when this happens.
     * Further discussion in bug #368178.
     */
    if (directory != nautilus_files_view_get_model (view))
    {
        char *file_uri, *dir_uri, *model_uri;
        file_uri = nautilus_file_get_uri (file);
        dir_uri = nautilus_directory_get_uri (directory);
        model_uri = nautilus_directory_get_uri (nautilus_files_view_get_model (view));
        g_warning ("nautilus_canvas_view_remove_file() - directory not canvas view model, shouldn't happen.\n"
                   "file: %p:%s, dir: %p:%s, model: %p:%s, view loading: %d\n"
                   "If you see this, please add this info to http://bugzilla.gnome.org/show_bug.cgi?id=368178",
                   file, file_uri, directory, dir_uri, nautilus_files_view_get_model (view), model_uri, nautilus_files_view_get_loading (view));
        g_free (file_uri);
        g_free (dir_uri);
        g_free (model_uri);
    }

    canvas_view = NAUTILUS_CANVAS_VIEW (view);

    if (nautilus_canvas_container_remove (get_canvas_container (canvas_view),
                                          NAUTILUS_CANVAS_ICON_DATA (file)))
    {
        nautilus_file_unref (file);
    }
}

static void
nautilus_canvas_view_add_files (NautilusFilesView *view,
                                GList             *files)
{
    NautilusCanvasView *canvas_view;
    NautilusCanvasContainer *canvas_container;
    GList *l;

    canvas_view = NAUTILUS_CANVAS_VIEW (view);
    canvas_container = get_canvas_container (canvas_view);

    for (l = files; l != NULL; l = l->next)
    {
        if (nautilus_canvas_container_add (canvas_container,
                                           NAUTILUS_CANVAS_ICON_DATA (l->data)))
        {
            nautilus_file_ref (NAUTILUS_FILE (l->data));
        }
    }
}

static void
nautilus_canvas_view_file_changed (NautilusFilesView *view,
                                   NautilusFile      *file,
                                   NautilusDirectory *directory)
{
    NautilusCanvasView *canvas_view;

    g_assert (directory == nautilus_files_view_get_model (view));

    g_return_if_fail (view != NULL);
    canvas_view = NAUTILUS_CANVAS_VIEW (view);

    nautilus_canvas_container_request_update
        (get_canvas_container (canvas_view),
        NAUTILUS_CANVAS_ICON_DATA (file));
}

static const SortCriterion *
nautilus_canvas_view_get_directory_sort_by (NautilusCanvasView *canvas_view,
                                            NautilusFile       *file)
{
    const SortCriterion *default_sort;
    g_autofree char *sort_by = NULL;
    gboolean reversed;

    default_sort = get_default_sort_order (file);
    g_return_val_if_fail (default_sort != NULL, NULL);

    sort_by = nautilus_file_get_metadata (file,
                                          NAUTILUS_METADATA_KEY_ICON_VIEW_SORT_BY,
                                          default_sort->metadata_text);

    reversed = nautilus_file_get_boolean_metadata (file,
                                                   NAUTILUS_METADATA_KEY_ICON_VIEW_SORT_REVERSED,
                                                   default_sort->reverse_order);

    return get_sort_criterion_by_metadata_text (sort_by, reversed);
}

static const SortCriterion *
get_default_sort_order (NautilusFile *file)
{
    NautilusFileSortType sort_type;
    gboolean reversed;

    sort_type = nautilus_file_get_default_sort_type (file, &reversed);

    return get_sort_criterion_by_sort_type (sort_type, reversed);
}

static void
nautilus_canvas_view_set_directory_sort_by (NautilusCanvasView  *canvas_view,
                                            NautilusFile        *file,
                                            const SortCriterion *sort)
{
    const SortCriterion *default_sort_criterion;

    default_sort_criterion = get_default_sort_order (file);
    g_return_if_fail (default_sort_criterion != NULL);

    nautilus_file_set_metadata
        (file, NAUTILUS_METADATA_KEY_ICON_VIEW_SORT_BY,
        default_sort_criterion->metadata_text,
        sort->metadata_text);
    nautilus_file_set_boolean_metadata (file,
                                        NAUTILUS_METADATA_KEY_ICON_VIEW_SORT_REVERSED,
                                        default_sort_criterion->reverse_order,
                                        sort->reverse_order);
}

static const SortCriterion *
get_sort_criterion_by_metadata_text (const char *metadata_text,
                                     gboolean    reversed)
{
    guint i;

    /* Figure out what the new sort setting should be. */
    for (i = 0; i < G_N_ELEMENTS (sort_criteria); i++)
    {
        if (g_strcmp0 (sort_criteria[i].metadata_text, metadata_text) == 0
            && reversed == sort_criteria[i].reverse_order)
        {
            return &sort_criteria[i];
        }
    }
    return &sort_criteria[0];
}

static const SortCriterion *
get_sort_criterion_by_action_target_name (const char *action_target_name)
{
    guint i;
    /* Figure out what the new sort setting should be. */
    for (i = 0; i < G_N_ELEMENTS (sort_criteria); i++)
    {
        if (g_strcmp0 (sort_criteria[i].action_target_name, action_target_name) == 0)
        {
            return &sort_criteria[i];
        }
    }
    return NULL;
}

static const SortCriterion *
get_sort_criterion_by_sort_type (NautilusFileSortType sort_type,
                                 gboolean             reversed)
{
    guint i;

    /* Figure out what the new sort setting should be. */
    for (i = 0; i < G_N_ELEMENTS (sort_criteria); i++)
    {
        if (sort_type == sort_criteria[i].sort_type
            && reversed == sort_criteria[i].reverse_order)
        {
            return &sort_criteria[i];
        }
    }

    return &sort_criteria[0];
}

static NautilusCanvasZoomLevel
get_default_zoom_level (NautilusCanvasView *canvas_view)
{
    NautilusCanvasZoomLevel default_zoom_level;

    default_zoom_level = g_settings_get_enum (nautilus_icon_view_preferences,
                                              NAUTILUS_PREFERENCES_ICON_VIEW_DEFAULT_ZOOM_LEVEL);

    return CLAMP (default_zoom_level, NAUTILUS_CANVAS_ZOOM_LEVEL_SMALL, NAUTILUS_CANVAS_ZOOM_LEVEL_LARGER);
}

static void
nautilus_canvas_view_begin_loading (NautilusFilesView *view)
{
    NautilusCanvasView *canvas_view;
    NautilusFile *file;
    char *uri;
    const SortCriterion *sort;

    g_return_if_fail (NAUTILUS_IS_CANVAS_VIEW (view));

    canvas_view = NAUTILUS_CANVAS_VIEW (view);
    file = nautilus_files_view_get_directory_as_file (view);
    uri = nautilus_file_get_uri (file);

    g_free (uri);

    /* Set the sort mode.
     * It's OK not to resort the icons because the
     * container doesn't have any icons at this point.
     */
    sort = nautilus_canvas_view_get_directory_sort_by (canvas_view, file);
    update_sort_criterion (canvas_view, sort, FALSE);

    /* We could have changed to the trash directory or to searching, and then
     * we need to update the menus */
    nautilus_files_view_update_context_menus (view);
    nautilus_files_view_update_toolbar_menus (view);
}

static void
on_clipboard_contents_received (GtkClipboard *clipboard,
                                const gchar  *selection_data,
                                gpointer      user_data)
{
    NautilusCanvasView *canvas_view;

    canvas_view = NAUTILUS_CANVAS_VIEW (user_data);

    if (canvas_view->destroyed)
    {
        /* We've been destroyed since call */
        g_object_unref (canvas_view);
        return;
    }

    if (nautilus_clipboard_is_cut_from_selection_data (selection_data))
    {
        GList *uris;
        GList *files;

        uris = nautilus_clipboard_get_uri_list_from_selection_data (selection_data);
        files = nautilus_file_list_from_uri_list (uris);
        nautilus_canvas_container_set_highlighted_for_clipboard (get_canvas_container (canvas_view),
                                                                 files);

        nautilus_file_list_free (files);
        g_list_free_full (uris, g_free);
    }
    else
    {
        nautilus_canvas_container_set_highlighted_for_clipboard (get_canvas_container (canvas_view),
                                                                 NULL);
    }

    g_object_unref (canvas_view);
}

static void
update_clipboard_status (NautilusCanvasView *view)
{
    g_object_ref (view);     /* Need to keep the object alive until we get the reply */
    gtk_clipboard_request_text (nautilus_clipboard_get (GTK_WIDGET (view)),
                                on_clipboard_contents_received,
                                view);
}

static void
on_clipboard_owner_changed (GtkClipboard *clipboard,
                            GdkEvent     *event,
                            gpointer      user_data)
{
    update_clipboard_status (NAUTILUS_CANVAS_VIEW (user_data));
}

static void
nautilus_canvas_view_end_loading (NautilusFilesView *view,
                                  gboolean           all_files_seen)
{
    NautilusCanvasView *canvas_view;

    canvas_view = NAUTILUS_CANVAS_VIEW (view);
    update_clipboard_status (canvas_view);
}

static NautilusCanvasZoomLevel
nautilus_canvas_view_get_zoom_level (NautilusFilesView *view)
{
    g_return_val_if_fail (NAUTILUS_IS_CANVAS_VIEW (view), NAUTILUS_CANVAS_ZOOM_LEVEL_LARGE);

    return nautilus_canvas_container_get_zoom_level (get_canvas_container (NAUTILUS_CANVAS_VIEW (view)));
}

static void
nautilus_canvas_view_zoom_to_level (NautilusFilesView *view,
                                    gint               new_level)
{
    NautilusCanvasView *canvas_view;
    NautilusCanvasContainer *canvas_container;

    g_return_if_fail (NAUTILUS_IS_CANVAS_VIEW (view));
    g_return_if_fail (new_level >= NAUTILUS_CANVAS_ZOOM_LEVEL_SMALL &&
                      new_level <= NAUTILUS_CANVAS_ZOOM_LEVEL_LARGER);

    canvas_view = NAUTILUS_CANVAS_VIEW (view);
    canvas_container = get_canvas_container (canvas_view);
    if (nautilus_canvas_container_get_zoom_level (canvas_container) == new_level)
    {
        return;
    }

    nautilus_canvas_container_set_zoom_level (canvas_container, new_level);
    g_action_group_change_action_state (nautilus_files_view_get_action_group (view),
                                        "zoom-to-level", g_variant_new_int32 (new_level));

    nautilus_files_view_update_toolbar_menus (view);
}

static void
nautilus_canvas_view_bump_zoom_level (NautilusFilesView *view,
                                      int                zoom_increment)
{
    NautilusCanvasZoomLevel new_level;

    g_return_if_fail (NAUTILUS_IS_CANVAS_VIEW (view));
    if (!nautilus_files_view_supports_zooming (view))
    {
        return;
    }

    new_level = nautilus_canvas_view_get_zoom_level (view) + zoom_increment;

    if (new_level >= NAUTILUS_CANVAS_ZOOM_LEVEL_SMALL &&
        new_level <= NAUTILUS_CANVAS_ZOOM_LEVEL_LARGER)
    {
        nautilus_canvas_view_zoom_to_level (view, new_level);
    }
}

static void
nautilus_canvas_view_restore_standard_zoom_level (NautilusFilesView *view)
{
    nautilus_canvas_view_zoom_to_level (view, NAUTILUS_CANVAS_ZOOM_LEVEL_LARGE);
}

static gboolean
nautilus_canvas_view_can_zoom_in (NautilusFilesView *view)
{
    g_return_val_if_fail (NAUTILUS_IS_CANVAS_VIEW (view), FALSE);

    return nautilus_canvas_view_get_zoom_level (view)
           < NAUTILUS_CANVAS_ZOOM_LEVEL_LARGER;
}

static gboolean
nautilus_canvas_view_can_zoom_out (NautilusFilesView *view)
{
    g_return_val_if_fail (NAUTILUS_IS_CANVAS_VIEW (view), FALSE);

    return nautilus_canvas_view_get_zoom_level (view)
           > NAUTILUS_CANVAS_ZOOM_LEVEL_SMALL;
}

static gfloat
nautilus_canvas_view_get_zoom_level_percentage (NautilusFilesView *view)
{
    guint icon_size;
    NautilusCanvasZoomLevel zoom_level;

    zoom_level = nautilus_canvas_view_get_zoom_level (view);
    icon_size = nautilus_canvas_container_get_icon_size_for_zoom_level (zoom_level);

    return (gfloat) icon_size / NAUTILUS_CANVAS_ICON_SIZE_LARGE;
}

static gboolean
nautilus_canvas_view_is_zoom_level_default (NautilusFilesView *view)
{
    guint icon_size;
    NautilusCanvasZoomLevel zoom_level;

    zoom_level = nautilus_canvas_view_get_zoom_level (view);
    icon_size = nautilus_canvas_container_get_icon_size_for_zoom_level (zoom_level);

    return icon_size == NAUTILUS_CANVAS_ICON_SIZE_LARGE;
}

static gboolean
nautilus_canvas_view_is_empty (NautilusFilesView *view)
{
    g_assert (NAUTILUS_IS_CANVAS_VIEW (view));

    return nautilus_canvas_container_is_empty
               (get_canvas_container (NAUTILUS_CANVAS_VIEW (view)));
}

static GList *
nautilus_canvas_view_get_selection (NautilusFilesView *view)
{
    GList *list;

    g_return_val_if_fail (NAUTILUS_IS_CANVAS_VIEW (view), NULL);

    list = nautilus_canvas_container_get_selection
               (get_canvas_container (NAUTILUS_CANVAS_VIEW (view)));
    nautilus_file_list_ref (list);
    return list;
}

static void
action_sort_order_changed (GSimpleAction *action,
                           GVariant      *value,
                           gpointer       user_data)
{
    const gchar *target_name;
    const SortCriterion *sort_criterion;

    g_assert (NAUTILUS_IS_CANVAS_VIEW (user_data));

    target_name = g_variant_get_string (value, NULL);
    sort_criterion = get_sort_criterion_by_action_target_name (target_name);

    g_assert (sort_criterion != NULL);

    update_sort_criterion (user_data, sort_criterion, TRUE);

    nautilus_canvas_container_sort (get_canvas_container (user_data));
    nautilus_canvas_view_reveal_selection (NAUTILUS_FILES_VIEW (user_data));

    g_simple_action_set_state (action, value);
}

static void
action_zoom_to_level (GSimpleAction *action,
                      GVariant      *state,
                      gpointer       user_data)
{
    NautilusFilesView *view;
    NautilusCanvasZoomLevel zoom_level;

    g_assert (NAUTILUS_IS_FILES_VIEW (user_data));

    view = NAUTILUS_FILES_VIEW (user_data);
    zoom_level = g_variant_get_int32 (state);
    nautilus_canvas_view_zoom_to_level (view, zoom_level);

    g_simple_action_set_state (G_SIMPLE_ACTION (action), state);
    if (g_settings_get_enum (nautilus_icon_view_preferences,
                             NAUTILUS_PREFERENCES_ICON_VIEW_DEFAULT_ZOOM_LEVEL) != zoom_level)
    {
        g_settings_set_enum (nautilus_icon_view_preferences,
                             NAUTILUS_PREFERENCES_ICON_VIEW_DEFAULT_ZOOM_LEVEL,
                             zoom_level);
    }
}

const GActionEntry canvas_view_entries[] =
{
    { "sort", NULL, "s", "'name'", action_sort_order_changed },
    { "zoom-to-level", NULL, NULL, "1", action_zoom_to_level }
};

static void
update_sort_action_state_hint (NautilusCanvasView *canvas_view)
{
    NautilusFile *file;
    GVariantBuilder builder;
    GActionGroup *action_group;
    GAction *action;
    GVariant *state_hint;
    gint idx;

    file = nautilus_files_view_get_directory_as_file (NAUTILUS_FILES_VIEW (canvas_view));
    g_variant_builder_init (&builder, G_VARIANT_TYPE ("as"));

    for (idx = 0; idx < G_N_ELEMENTS (sort_criteria); idx++)
    {
        if (sort_criteria[idx].match_func == NULL ||
            (file != NULL && sort_criteria[idx].match_func (file)))
        {
            g_variant_builder_add (&builder, "s", sort_criteria[idx].action_target_name);
        }
    }

    state_hint = g_variant_builder_end (&builder);

    action_group = nautilus_files_view_get_action_group (NAUTILUS_FILES_VIEW (canvas_view));
    action = g_action_map_lookup_action (G_ACTION_MAP (action_group), "sort");
    g_simple_action_set_state_hint (G_SIMPLE_ACTION (action), state_hint);

    g_variant_unref (state_hint);
}

static gboolean
showing_recent_directory (NautilusFilesView *view)
{
    NautilusFile *file;

    file = nautilus_files_view_get_directory_as_file (view);
    if (file != NULL)
    {
        return nautilus_file_is_in_recent (file);
    }
    return FALSE;
}

static gboolean
showing_search_directory (NautilusFilesView *view)
{
    NautilusFile *file;

    file = nautilus_files_view_get_directory_as_file (view);
    if (file != NULL)
    {
        return nautilus_file_is_in_search (file);
    }
    return FALSE;
}

static void
nautilus_canvas_view_update_actions_state (NautilusFilesView *view)
{
    GActionGroup *view_action_group;
    GVariant *sort_state;
    GAction *action;
    NautilusCanvasView *canvas_view;

    canvas_view = NAUTILUS_CANVAS_VIEW (view);

    NAUTILUS_FILES_VIEW_CLASS (nautilus_canvas_view_parent_class)->update_actions_state (view);

    view_action_group = nautilus_files_view_get_action_group (view);

    /* When we change the sort action state, even using the same value, it triggers
     * the sort action changed handler, which reveals the selection, since we expect
     * the selection to be visible when the user changes the sort order. But we may
     * need to update the actions state for others reason than an actual sort change,
     * so we need to prevent to trigger the sort action changed handler for those cases.
     * To achieve this, check if the action state value actually changed before setting
     * it
     */
    sort_state = g_action_group_get_action_state (view_action_group, "sort");

    if (g_strcmp0 (g_variant_get_string (sort_state, NULL),
                   canvas_view->sort->action_target_name) != 0)
    {
        g_action_group_change_action_state (view_action_group,
                                            "sort",
                                            g_variant_new_string (canvas_view->sort->action_target_name));
    }

    action = g_action_map_lookup_action (G_ACTION_MAP (view_action_group), "sort");
    g_simple_action_set_enabled (G_SIMPLE_ACTION (action),
                                 !showing_recent_directory (view) &&
                                 !showing_search_directory (view));

    update_sort_action_state_hint (canvas_view);

    g_variant_unref (sort_state);
}

static void
nautilus_canvas_view_select_all (NautilusFilesView *view)
{
    NautilusCanvasContainer *canvas_container;

    g_return_if_fail (NAUTILUS_IS_CANVAS_VIEW (view));

    canvas_container = get_canvas_container (NAUTILUS_CANVAS_VIEW (view));
    nautilus_canvas_container_select_all (canvas_container);
}

static void
nautilus_canvas_view_select_first (NautilusFilesView *view)
{
    NautilusCanvasContainer *canvas_container;

    g_return_if_fail (NAUTILUS_IS_CANVAS_VIEW (view));

    canvas_container = get_canvas_container (NAUTILUS_CANVAS_VIEW (view));
    nautilus_canvas_container_select_first (canvas_container);
}

static void
nautilus_canvas_view_reveal_selection (NautilusFilesView *view)
{
    g_autolist (NautilusFile) selection = NULL;

    g_return_if_fail (NAUTILUS_IS_CANVAS_VIEW (view));

    selection = nautilus_view_get_selection (NAUTILUS_VIEW (view));

    /* Make sure at least one of the selected items is scrolled into view */
    if (selection != NULL)
    {
        /* Update the icon ordering to reveal the rigth selection */
        nautilus_canvas_container_layout_now (get_canvas_container (NAUTILUS_CANVAS_VIEW (view)));
        nautilus_canvas_container_reveal
            (get_canvas_container (NAUTILUS_CANVAS_VIEW (view)),
            selection->data);
    }
}

static GdkRectangle *
get_rectangle_for_data (NautilusFilesView      *view,
                        NautilusCanvasIconData *data)
{
    NautilusCanvasContainer *container;
    GdkRectangle *rectangle;

    container = get_canvas_container (NAUTILUS_CANVAS_VIEW (view));
    rectangle = nautilus_canvas_container_get_icon_bounding_box (container, data);
    if (rectangle != NULL)
    {
        GtkWidget *context_widget;
        GtkAdjustment *vadjustment;
        GtkAdjustment *hadjustment;

        context_widget = nautilus_files_view_get_content_widget (view);
        vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (context_widget));
        hadjustment = gtk_scrolled_window_get_hadjustment (GTK_SCROLLED_WINDOW (context_widget));

        rectangle->x -= gtk_adjustment_get_value (hadjustment);
        rectangle->y -= gtk_adjustment_get_value (vadjustment);
    }
    return rectangle;
}

static GdkRectangle *
nautilus_canvas_view_compute_rename_popover_pointing_to (NautilusFilesView *view)
{
    g_autolist (NautilusFile) selection = NULL;
    NautilusCanvasIconData *data;

    g_return_val_if_fail (NAUTILUS_IS_CANVAS_VIEW (view), NULL);

    selection = nautilus_view_get_selection (NAUTILUS_VIEW (view));
    g_return_val_if_fail (selection != NULL, NULL);

    /* We only allow renaming one item at once */
    data = NAUTILUS_CANVAS_ICON_DATA (selection->data);

    return get_rectangle_for_data (view, data);
}

static GdkRectangle *
nautilus_canvas_view_reveal_for_selection_context_menu (NautilusFilesView *view)
{
    g_autolist (NautilusFile) selection = NULL;
    NautilusCanvasContainer *container;
    NautilusCanvasIconData *data;

    g_return_val_if_fail (NAUTILUS_IS_CANVAS_VIEW (view), NULL);

    selection = nautilus_view_get_selection (NAUTILUS_VIEW (view));
    g_return_val_if_fail (selection != NULL, NULL);

    container = get_canvas_container (NAUTILUS_CANVAS_VIEW (view));

    /* Update the icon ordering to reveal the rigth selection */
    nautilus_canvas_container_layout_now (container);

    /* Get the data of the focused item, if selected. Otherwise, get the
     * data of the last selected item.*/
    data = nautilus_canvas_container_get_focused_icon (container);
    if (data == NULL || g_list_find (selection, NAUTILUS_FILE (data)) == NULL)
    {
        selection = g_list_last (selection);
        data = NAUTILUS_CANVAS_ICON_DATA (selection->data);
    }

    nautilus_canvas_container_reveal (container, data);

    return get_rectangle_for_data (view, data);
}

static void
nautilus_canvas_view_set_selection (NautilusFilesView *view,
                                    GList             *selection)
{
    g_return_if_fail (NAUTILUS_IS_CANVAS_VIEW (view));

    nautilus_canvas_container_set_selection
        (get_canvas_container (NAUTILUS_CANVAS_VIEW (view)), selection);
}

static void
nautilus_canvas_view_invert_selection (NautilusFilesView *view)
{
    g_return_if_fail (NAUTILUS_IS_CANVAS_VIEW (view));

    nautilus_canvas_container_invert_selection
        (get_canvas_container (NAUTILUS_CANVAS_VIEW (view)));
}

static void
nautilus_canvas_view_widget_to_file_operation_position (NautilusFilesView *view,
                                                        GdkPoint          *position)
{
    g_assert (NAUTILUS_IS_CANVAS_VIEW (view));

    nautilus_canvas_container_widget_to_file_operation_position
        (get_canvas_container (NAUTILUS_CANVAS_VIEW (view)), position);
}

static void
canvas_container_activate_callback (NautilusCanvasContainer *container,
                                    GList                   *file_list,
                                    NautilusCanvasView      *canvas_view)
{
    g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));
    g_assert (container == get_canvas_container (canvas_view));

    nautilus_files_view_activate_files (NAUTILUS_FILES_VIEW (canvas_view),
                                        file_list,
                                        0, TRUE);
}

static void
canvas_container_activate_previewer_callback (NautilusCanvasContainer *container,
                                              GList                   *file_list,
                                              GArray                  *locations,
                                              NautilusCanvasView      *canvas_view)
{
    g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));
    g_assert (container == get_canvas_container (canvas_view));

    nautilus_files_view_preview_files (NAUTILUS_FILES_VIEW (canvas_view),
                                       file_list, locations);
}

/* this is called in one of these cases:
 * - we activate with enter holding shift
 * - we activate with space holding shift
 * - we double click an canvas holding shift
 * - we middle click an canvas
 *
 * If we don't open in new windows by default, the behavior should be
 * - middle click, shift + activate -> open in new tab
 * - shift + double click -> open in new window
 *
 * If we open in new windows by default, the behaviour should be
 * - middle click, or shift + activate, or shift + double-click -> close parent
 */
static void
canvas_container_activate_alternate_callback (NautilusCanvasContainer *container,
                                              GList                   *file_list,
                                              NautilusCanvasView      *canvas_view)
{
    GdkEvent *event;
    GdkEventButton *button_event;
    GdkEventKey *key_event;
    gboolean open_in_tab, open_in_window;
    NautilusWindowOpenFlags flags;

    g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));
    g_assert (container == get_canvas_container (canvas_view));

    flags = 0;
    event = gtk_get_current_event ();
    open_in_tab = FALSE;
    open_in_window = FALSE;

    if (event->type == GDK_BUTTON_PRESS ||
        event->type == GDK_BUTTON_RELEASE ||
        event->type == GDK_2BUTTON_PRESS ||
        event->type == GDK_3BUTTON_PRESS)
    {
        button_event = (GdkEventButton *) event;
        open_in_window = ((button_event->state & GDK_SHIFT_MASK) != 0);
        open_in_tab = !open_in_window;
    }
    else if (event->type == GDK_KEY_PRESS ||
             event->type == GDK_KEY_RELEASE)
    {
        key_event = (GdkEventKey *) event;
        open_in_tab = ((key_event->state & GDK_SHIFT_MASK) != 0);
    }

    if (open_in_tab)
    {
        flags |= NAUTILUS_WINDOW_OPEN_FLAG_NEW_TAB;
        flags |= NAUTILUS_WINDOW_OPEN_FLAG_DONT_MAKE_ACTIVE;
    }

    if (open_in_window)
    {
        flags |= NAUTILUS_WINDOW_OPEN_FLAG_NEW_WINDOW;
    }

    DEBUG ("Activate alternate, open in tab %d, new window %d\n",
           open_in_tab, open_in_window);

    nautilus_files_view_activate_files (NAUTILUS_FILES_VIEW (canvas_view),
                                        file_list,
                                        flags,
                                        TRUE);
}

static void
band_select_started_callback (NautilusCanvasContainer *container,
                              NautilusCanvasView      *canvas_view)
{
    g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));
    g_assert (container == get_canvas_container (canvas_view));

    nautilus_files_view_start_batching_selection_changes (NAUTILUS_FILES_VIEW (canvas_view));
}

static void
band_select_ended_callback (NautilusCanvasContainer *container,
                            NautilusCanvasView      *canvas_view)
{
    g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));
    g_assert (container == get_canvas_container (canvas_view));

    nautilus_files_view_stop_batching_selection_changes (NAUTILUS_FILES_VIEW (canvas_view));
}

int
nautilus_canvas_view_compare_files (NautilusCanvasView *canvas_view,
                                    NautilusFile       *a,
                                    NautilusFile       *b)
{
    return nautilus_file_compare_for_sort
               (a, b, canvas_view->sort->sort_type,
               /* Use type-unsafe cast for performance */
               nautilus_files_view_should_sort_directories_first ((NautilusFilesView *) canvas_view),
               canvas_view->sort->reverse_order);
}

static int
compare_files (NautilusFilesView *canvas_view,
               NautilusFile      *a,
               NautilusFile      *b)
{
    return nautilus_canvas_view_compare_files ((NautilusCanvasView *) canvas_view, a, b);
}

static void
selection_changed_callback (NautilusCanvasContainer *container,
                            NautilusCanvasView      *canvas_view)
{
    g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));
    g_assert (container == get_canvas_container (canvas_view));

    nautilus_files_view_notify_selection_changed (NAUTILUS_FILES_VIEW (canvas_view));
}

static void
canvas_container_context_click_selection_callback (NautilusCanvasContainer *container,
                                                   const GdkEvent          *event,
                                                   NautilusCanvasView      *canvas_view)
{
    g_assert (NAUTILUS_IS_CANVAS_CONTAINER (container));
    g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));

    nautilus_files_view_pop_up_selection_context_menu (NAUTILUS_FILES_VIEW (canvas_view),
                                                       event);
}

static void
canvas_container_context_click_background_callback (NautilusCanvasContainer *container,
                                                    const GdkEvent          *event,
                                                    NautilusCanvasView      *canvas_view)
{
    g_assert (NAUTILUS_IS_CANVAS_CONTAINER (container));
    g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));

    nautilus_files_view_pop_up_background_context_menu (NAUTILUS_FILES_VIEW (canvas_view),
                                                        event);
}

static char *
get_icon_uri_callback (NautilusCanvasContainer *container,
                       NautilusFile            *file,
                       NautilusCanvasView      *canvas_view)
{
    g_assert (NAUTILUS_IS_CANVAS_CONTAINER (container));
    g_assert (NAUTILUS_IS_FILE (file));
    g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));

    return nautilus_file_get_uri (file);
}

static char *
get_icon_activation_uri_callback (NautilusCanvasContainer *container,
                                  NautilusFile            *file,
                                  NautilusCanvasView      *canvas_view)
{
    g_assert (NAUTILUS_IS_CANVAS_CONTAINER (container));
    g_assert (NAUTILUS_IS_FILE (file));
    g_assert (NAUTILUS_IS_CANVAS_VIEW (canvas_view));

    return nautilus_file_get_activation_uri (file);
}

static char *
get_icon_drop_target_uri_callback (NautilusCanvasContainer *container,
                                   NautilusFile            *file,
                                   NautilusCanvasView      *canvas_view)
{
    g_return_val_if_fail (NAUTILUS_IS_CANVAS_CONTAINER (container), NULL);
    g_return_val_if_fail (NAUTILUS_IS_FILE (file), NULL);
    g_return_val_if_fail (NAUTILUS_IS_CANVAS_VIEW (canvas_view), NULL);

    return nautilus_file_get_uri (file);
}

/* Preferences changed callbacks */
static void
nautilus_canvas_view_click_policy_changed (NautilusFilesView *directory_view)
{
    g_assert (NAUTILUS_IS_CANVAS_VIEW (directory_view));

    nautilus_canvas_view_update_click_mode (NAUTILUS_CANVAS_VIEW (directory_view));
}

static void
image_display_policy_changed_callback (gpointer callback_data)
{
    NautilusCanvasView *canvas_view;

    canvas_view = NAUTILUS_CANVAS_VIEW (callback_data);

    nautilus_canvas_container_request_update_all (get_canvas_container (canvas_view));
}

static void
text_attribute_names_changed_callback (gpointer callback_data)
{
    NautilusCanvasView *canvas_view;

    canvas_view = NAUTILUS_CANVAS_VIEW (callback_data);

    nautilus_canvas_container_request_update_all (get_canvas_container (canvas_view));
}

static void
default_sort_order_changed_callback (gpointer callback_data)
{
    NautilusCanvasView *canvas_view;
    NautilusFile *file;
    const SortCriterion *sort;
    NautilusCanvasContainer *canvas_container;

    g_return_if_fail (NAUTILUS_IS_CANVAS_VIEW (callback_data));

    canvas_view = NAUTILUS_CANVAS_VIEW (callback_data);

    file = nautilus_files_view_get_directory_as_file (NAUTILUS_FILES_VIEW (canvas_view));
    sort = nautilus_canvas_view_get_directory_sort_by (canvas_view, file);
    update_sort_criterion (canvas_view, sort, FALSE);

    canvas_container = get_canvas_container (canvas_view);
    g_return_if_fail (NAUTILUS_IS_CANVAS_CONTAINER (canvas_container));

    nautilus_canvas_container_request_update_all (canvas_container);
}

static void
nautilus_canvas_view_sort_directories_first_changed (NautilusFilesView *directory_view)
{
    NautilusCanvasView *canvas_view;

    canvas_view = NAUTILUS_CANVAS_VIEW (directory_view);

    nautilus_canvas_container_sort (get_canvas_container (canvas_view));
}

static void
nautilus_canvas_view_preview_selection_event (NautilusFilesView *directory_view,
                                              GtkDirectionType   direction)
{
    NautilusCanvasView *canvas_view;

    canvas_view = NAUTILUS_CANVAS_VIEW (directory_view);

    nautilus_canvas_container_preview_selection_event (get_canvas_container (canvas_view),
                                                       direction);
}

static char *
canvas_view_get_container_uri (NautilusCanvasContainer *container,
                               NautilusFilesView       *view)
{
    return nautilus_files_view_get_uri (view);
}

static void
canvas_view_move_copy_items (NautilusCanvasContainer *container,
                             const GList             *item_uris,
                             const char              *target_dir,
                             int                      copy_action,
                             NautilusFilesView       *view)
{
    nautilus_clipboard_clear_if_colliding_uris (GTK_WIDGET (view),
                                                item_uris);
    nautilus_files_view_move_copy_items (view, item_uris, target_dir,
                                         copy_action);
}

static void
nautilus_canvas_view_update_click_mode (NautilusCanvasView *canvas_view)
{
    NautilusCanvasContainer *canvas_container;
    int click_mode;

    canvas_container = get_canvas_container (canvas_view);
    g_assert (canvas_container != NULL);

    click_mode = g_settings_get_enum (nautilus_preferences, NAUTILUS_PREFERENCES_CLICK_POLICY);

    nautilus_canvas_container_set_single_click_mode (canvas_container,
                                                     click_mode == NAUTILUS_CLICK_POLICY_SINGLE);
}

static void
canvas_container_longpress_gesture_pressed_callback (GtkGestureLongPress *gesture,
                                                     gdouble              x,
                                                     gdouble              y,
                                                     gpointer             user_data)
{
    GdkEventSequence *event_sequence;
    const GdkEvent *event;
    NautilusCanvasView *view = NAUTILUS_CANVAS_VIEW (user_data);

    event_sequence = gtk_gesture_get_last_updated_sequence (GTK_GESTURE (gesture));
    event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), event_sequence);

    if (nautilus_view_get_selection (NAUTILUS_VIEW (view)))
    {
        nautilus_files_view_pop_up_selection_context_menu (NAUTILUS_FILES_VIEW (view),
                                                           event);
    }
    else
    {
        nautilus_files_view_pop_up_background_context_menu (NAUTILUS_FILES_VIEW (view),
                                                            event);
    }
}

static void
initialize_canvas_container (NautilusCanvasView      *canvas_view,
                             NautilusCanvasContainer *canvas_container)
{
    GtkWidget *content_widget;
    GtkGesture *longpress_gesture;

    content_widget = nautilus_files_view_get_content_widget (NAUTILUS_FILES_VIEW (canvas_view));
    canvas_view->canvas_container = GTK_WIDGET (canvas_container);
    g_object_add_weak_pointer (G_OBJECT (canvas_container),
                               (gpointer *) &canvas_view->canvas_container);

    longpress_gesture = gtk_gesture_long_press_new (GTK_WIDGET (content_widget));
    gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (longpress_gesture),
                                                GTK_PHASE_CAPTURE);
    gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (longpress_gesture),
                                       TRUE);
    g_signal_connect (longpress_gesture, "pressed",
                      (GCallback) canvas_container_longpress_gesture_pressed_callback,
                      canvas_view);

    gtk_widget_set_can_focus (GTK_WIDGET (canvas_container), TRUE);

    g_signal_connect_object (canvas_container, "activate",
                             G_CALLBACK (canvas_container_activate_callback), canvas_view, 0);
    g_signal_connect_object (canvas_container, "activate-alternate",
                             G_CALLBACK (canvas_container_activate_alternate_callback), canvas_view, 0);
    g_signal_connect_object (canvas_container, "activate-previewer",
                             G_CALLBACK (canvas_container_activate_previewer_callback), canvas_view, 0);
    g_signal_connect_object (canvas_container, "band-select-started",
                             G_CALLBACK (band_select_started_callback), canvas_view, 0);
    g_signal_connect_object (canvas_container, "band-select-ended",
                             G_CALLBACK (band_select_ended_callback), canvas_view, 0);
    g_signal_connect_object (canvas_container, "context-click-selection",
                             G_CALLBACK (canvas_container_context_click_selection_callback), canvas_view, 0);
    g_signal_connect_object (canvas_container, "context-click-background",
                             G_CALLBACK (canvas_container_context_click_background_callback), canvas_view, 0);
    g_signal_connect_object (canvas_container, "selection-changed",
                             G_CALLBACK (selection_changed_callback), canvas_view, 0);
    /* FIXME: many of these should move into fm-canvas-container as virtual methods */
    g_signal_connect_object (canvas_container, "get-icon-uri",
                             G_CALLBACK (get_icon_uri_callback), canvas_view, 0);
    g_signal_connect_object (canvas_container, "get-icon-activation-uri",
                             G_CALLBACK (get_icon_activation_uri_callback), canvas_view, 0);
    g_signal_connect_object (canvas_container, "get-icon-drop-target-uri",
                             G_CALLBACK (get_icon_drop_target_uri_callback), canvas_view, 0);
    g_signal_connect_object (canvas_container, "move-copy-items",
                             G_CALLBACK (canvas_view_move_copy_items), canvas_view, 0);
    g_signal_connect_object (canvas_container, "get-container-uri",
                             G_CALLBACK (canvas_view_get_container_uri), canvas_view, 0);

    gtk_container_add (GTK_CONTAINER (content_widget),
                       GTK_WIDGET (canvas_container));

    nautilus_canvas_view_update_click_mode (canvas_view);
    nautilus_canvas_container_set_zoom_level (canvas_container,
                                              get_default_zoom_level (canvas_view));

    gtk_widget_show (GTK_WIDGET (canvas_container));
}

static void
canvas_view_handle_uri_list (NautilusCanvasContainer *container,
                             const char              *item_uris,
                             const char              *target_uri,
                             GdkDragAction            action,
                             NautilusCanvasView      *view)
{
    nautilus_files_view_handle_uri_list_drop (NAUTILUS_FILES_VIEW (view),
                                              item_uris, target_uri, action);
}

/* Handles an URL received from Mozilla */
static void
canvas_view_handle_netscape_url (NautilusCanvasContainer *container,
                                 const char              *encoded_url,
                                 const char              *target_uri,
                                 GdkDragAction            action,
                                 NautilusCanvasView      *view)
{
    nautilus_files_view_handle_netscape_url_drop (NAUTILUS_FILES_VIEW (view),
                                                  encoded_url, target_uri, action);
}

static void
canvas_view_handle_text (NautilusCanvasContainer *container,
                         const char              *text,
                         const char              *target_uri,
                         GdkDragAction            action,
                         NautilusCanvasView      *view)
{
    nautilus_files_view_handle_text_drop (NAUTILUS_FILES_VIEW (view),
                                          text, target_uri, action);
}

static void
canvas_view_handle_raw (NautilusCanvasContainer *container,
                        const char              *raw_data,
                        int                      length,
                        const char              *target_uri,
                        const char              *direct_save_uri,
                        GdkDragAction            action,
                        NautilusCanvasView      *view)
{
    nautilus_files_view_handle_raw_drop (NAUTILUS_FILES_VIEW (view),
                                         raw_data, length, target_uri, direct_save_uri, action);
}

static void
canvas_view_handle_hover (NautilusCanvasContainer *container,
                          const char              *target_uri,
                          NautilusCanvasView      *view)
{
    nautilus_files_view_handle_hover (NAUTILUS_FILES_VIEW (view), target_uri);
}

static char *
canvas_view_get_first_visible_file (NautilusFilesView *view)
{
    NautilusFile *file;
    NautilusCanvasView *canvas_view;

    canvas_view = NAUTILUS_CANVAS_VIEW (view);

    file = NAUTILUS_FILE (nautilus_canvas_container_get_first_visible_icon (get_canvas_container (canvas_view)));

    if (file)
    {
        return nautilus_file_get_uri (file);
    }

    return NULL;
}

static void
canvas_view_scroll_to_file (NautilusFilesView *view,
                            const char        *uri)
{
    NautilusFile *file;
    NautilusCanvasView *canvas_view;

    canvas_view = NAUTILUS_CANVAS_VIEW (view);

    if (uri != NULL)
    {
        /* Only if existing, since we don't want to add the file to
         *  the directory if it has been removed since then */
        file = nautilus_file_get_existing_by_uri (uri);
        if (file != NULL)
        {
            nautilus_canvas_container_scroll_to_canvas (get_canvas_container (canvas_view),
                                                        NAUTILUS_CANVAS_ICON_DATA (file));
            nautilus_file_unref (file);
        }
    }
}

static guint
nautilus_canvas_view_get_id (NautilusFilesView *view)
{
    return NAUTILUS_VIEW_GRID_ID;
}

static void
nautilus_canvas_view_dispose (GObject *object)
{
    NautilusCanvasView *canvas_view;

    canvas_view = NAUTILUS_CANVAS_VIEW (object);
    canvas_view->destroyed = TRUE;

    g_signal_handlers_disconnect_by_func (nautilus_preferences,
                                          default_sort_order_changed_callback,
                                          canvas_view);
    g_signal_handlers_disconnect_by_func (nautilus_preferences,
                                          image_display_policy_changed_callback,
                                          canvas_view);

    g_signal_handlers_disconnect_by_func (nautilus_icon_view_preferences,
                                          text_attribute_names_changed_callback,
                                          canvas_view);


    G_OBJECT_CLASS (nautilus_canvas_view_parent_class)->dispose (object);
}

static void
nautilus_canvas_view_class_init (NautilusCanvasViewClass *klass)
{
    NautilusFilesViewClass *nautilus_files_view_class;
    GObjectClass *oclass;

    nautilus_files_view_class = NAUTILUS_FILES_VIEW_CLASS (klass);
    oclass = G_OBJECT_CLASS (klass);

    oclass->dispose = nautilus_canvas_view_dispose;

    GTK_WIDGET_CLASS (klass)->destroy = nautilus_canvas_view_destroy;

    nautilus_files_view_class->add_files = nautilus_canvas_view_add_files;
    nautilus_files_view_class->begin_loading = nautilus_canvas_view_begin_loading;
    nautilus_files_view_class->bump_zoom_level = nautilus_canvas_view_bump_zoom_level;
    nautilus_files_view_class->can_zoom_in = nautilus_canvas_view_can_zoom_in;
    nautilus_files_view_class->can_zoom_out = nautilus_canvas_view_can_zoom_out;
    nautilus_files_view_class->get_zoom_level_percentage = nautilus_canvas_view_get_zoom_level_percentage;
    nautilus_files_view_class->is_zoom_level_default = nautilus_canvas_view_is_zoom_level_default;
    nautilus_files_view_class->clear = nautilus_canvas_view_clear;
    nautilus_files_view_class->end_loading = nautilus_canvas_view_end_loading;
    nautilus_files_view_class->file_changed = nautilus_canvas_view_file_changed;
    nautilus_files_view_class->compute_rename_popover_pointing_to = nautilus_canvas_view_compute_rename_popover_pointing_to;
    nautilus_files_view_class->get_selection = nautilus_canvas_view_get_selection;
    nautilus_files_view_class->get_selection_for_file_transfer = nautilus_canvas_view_get_selection;
    nautilus_files_view_class->is_empty = nautilus_canvas_view_is_empty;
    nautilus_files_view_class->remove_file = nautilus_canvas_view_remove_file;
    nautilus_files_view_class->restore_standard_zoom_level = nautilus_canvas_view_restore_standard_zoom_level;
    nautilus_files_view_class->reveal_selection = nautilus_canvas_view_reveal_selection;
    nautilus_files_view_class->select_all = nautilus_canvas_view_select_all;
    nautilus_files_view_class->select_first = nautilus_canvas_view_select_first;
    nautilus_files_view_class->set_selection = nautilus_canvas_view_set_selection;
    nautilus_files_view_class->invert_selection = nautilus_canvas_view_invert_selection;
    nautilus_files_view_class->compare_files = compare_files;
    nautilus_files_view_class->click_policy_changed = nautilus_canvas_view_click_policy_changed;
    nautilus_files_view_class->update_actions_state = nautilus_canvas_view_update_actions_state;
    nautilus_files_view_class->sort_directories_first_changed = nautilus_canvas_view_sort_directories_first_changed;
    nautilus_files_view_class->widget_to_file_operation_position = nautilus_canvas_view_widget_to_file_operation_position;
    nautilus_files_view_class->get_view_id = nautilus_canvas_view_get_id;
    nautilus_files_view_class->get_first_visible_file = canvas_view_get_first_visible_file;
    nautilus_files_view_class->scroll_to_file = canvas_view_scroll_to_file;
    nautilus_files_view_class->reveal_for_selection_context_menu = nautilus_canvas_view_reveal_for_selection_context_menu;
    nautilus_files_view_class->preview_selection_event = nautilus_canvas_view_preview_selection_event;
}

static void
nautilus_canvas_view_init (NautilusCanvasView *canvas_view)
{
    NautilusCanvasContainer *canvas_container;
    GActionGroup *view_action_group;
    GtkClipboard *clipboard;

    canvas_view->sort = &sort_criteria[0];
    canvas_view->destroyed = FALSE;

    canvas_container = nautilus_canvas_view_container_new (canvas_view);
    initialize_canvas_container (canvas_view, canvas_container);

    g_signal_connect_swapped (nautilus_preferences,
                              "changed::" NAUTILUS_PREFERENCES_DEFAULT_SORT_ORDER,
                              G_CALLBACK (default_sort_order_changed_callback),
                              canvas_view);
    g_signal_connect_swapped (nautilus_preferences,
                              "changed::" NAUTILUS_PREFERENCES_DEFAULT_SORT_IN_REVERSE_ORDER,
                              G_CALLBACK (default_sort_order_changed_callback),
                              canvas_view);
    g_signal_connect_swapped (nautilus_preferences,
                              "changed::" NAUTILUS_PREFERENCES_SHOW_FILE_THUMBNAILS,
                              G_CALLBACK (image_display_policy_changed_callback),
                              canvas_view);

    g_signal_connect_swapped (nautilus_icon_view_preferences,
                              "changed::" NAUTILUS_PREFERENCES_ICON_VIEW_CAPTIONS,
                              G_CALLBACK (text_attribute_names_changed_callback),
                              canvas_view);

    g_signal_connect_object (canvas_container, "handle-uri-list",
                             G_CALLBACK (canvas_view_handle_uri_list), canvas_view, 0);
    g_signal_connect_object (canvas_container, "handle-netscape-url",
                             G_CALLBACK (canvas_view_handle_netscape_url), canvas_view, 0);
    g_signal_connect_object (canvas_container, "handle-text",
                             G_CALLBACK (canvas_view_handle_text), canvas_view, 0);
    g_signal_connect_object (canvas_container, "handle-raw",
                             G_CALLBACK (canvas_view_handle_raw), canvas_view, 0);
    g_signal_connect_object (canvas_container, "handle-hover",
                             G_CALLBACK (canvas_view_handle_hover), canvas_view, 0);

    /* React to clipboard changes */
    clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
    g_signal_connect (clipboard, "owner-change",
                      G_CALLBACK (on_clipboard_owner_changed), canvas_view);

    view_action_group = nautilus_files_view_get_action_group (NAUTILUS_FILES_VIEW (canvas_view));
    g_action_map_add_action_entries (G_ACTION_MAP (view_action_group),
                                     canvas_view_entries,
                                     G_N_ELEMENTS (canvas_view_entries),
                                     canvas_view);
    /* Keep the action synced with the actual value, so the toolbar can poll it */
    g_action_group_change_action_state (nautilus_files_view_get_action_group (NAUTILUS_FILES_VIEW (canvas_view)),
                                        "zoom-to-level", g_variant_new_int32 (get_default_zoom_level (canvas_view)));
}

NautilusFilesView *
nautilus_canvas_view_new (NautilusWindowSlot *slot)
{
    return g_object_new (NAUTILUS_TYPE_CANVAS_VIEW,
                         "window-slot", slot,
                         NULL);
}