[nautilus/wip/ernestask/tasks: 292/312] Add file task class



commit 6dd8b5049c0e259a420979a527fbc0625d117821
Author: Ernestas Kulik <ernestask gnome org>
Date:   Sat May 13 18:36:14 2017 +0300

    Add file task class

 src/meson.build                        |   5 +-
 src/tasks/nautilus-file-task-private.h |  74 ++++
 src/tasks/nautilus-file-task.c         | 642 +++++++++++++++++++++++++++++++++
 src/tasks/nautilus-file-task.h         |  37 ++
 4 files changed, 757 insertions(+), 1 deletion(-)
---
diff --git a/src/meson.build b/src/meson.build
index 48a770e90..f46da9e54 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -268,7 +268,10 @@ libnautilus_sources = [
   'nautilus-task.c',
   'nautilus-task.h',
   'nautilus-task-manager.c',
-  'nautilus-task-manager.h'
+  'nautilus-task-manager.h',
+  'tasks/nautilus-file-task.c',
+  'tasks/nautilus-file-task.h',
+  'tasks/nautilus-file-task-private.h'
 ]
 
 nautilus_deps = [
diff --git a/src/tasks/nautilus-file-task-private.h b/src/tasks/nautilus-file-task-private.h
new file mode 100644
index 000000000..a89cd0e88
--- /dev/null
+++ b/src/tasks/nautilus-file-task-private.h
@@ -0,0 +1,74 @@
+/* nautilus-file-task-private.h - private methods for file tasks.
+ *
+ * Copyright (C) 2017 Ernestas Kulik <ernestask gnome org>
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors: Ernestas Kulik <ernestask gnome org>
+ */
+
+#ifndef NAUTILUS_FILE_TASK_PRIVATE_H
+#define NAUTILUS_FILE_TASK_PRIVATE_H
+
+#include "nautilus-file-task.h"
+#include "nautilus-file-undo-manager.h"
+#include "nautilus-progress-info.h"
+
+#include <gio/gio.h>
+
+#define SECONDS_NEEDED_FOR_APPROXIMATE_TRANSFER_RATE 1
+#define SECONDS_NEEDED_FOR_RELIABLE_TRANSFER_RATE 8
+
+#define IS_IO_ERROR(__error, KIND) (((__error)->domain == G_IO_ERROR && (__error)->code == G_IO_ERROR_ ## 
KIND))
+
+#define CANCEL _("_Cancel")
+#define SKIP _("_Skip")
+#define SKIP_ALL _("S_kip All")
+#define RETRY _("_Retry")
+#define DELETE _("_Delete")
+#define DELETE_ALL _("Delete _All")
+#define REPLACE _("_Replace")
+#define REPLACE_ALL _("Replace _All")
+#define MERGE _("_Merge")
+#define MERGE_ALL _("Merge _All")
+#define COPY_FORCE _("Copy _Anyway")
+
+GtkWindow *nautilus_file_task_get_parent_window (NautilusFileTask *self);
+
+NautilusProgressInfo *nautilus_file_task_get_progress_info (NautilusFileTask *self);
+
+int nautilus_file_task_prompt_error (NautilusFileTask *self,
+                                     char             *primary_text,
+                                     char             *secondary_text,
+                                     const char       *details_text,
+                                     gboolean          show_all,
+                                     ...);
+
+int nautilus_file_task_prompt_warning (NautilusFileTask *self,
+                                       char             *primary_text,
+                                       char             *secondary_text,
+                                       const char       *details_text,
+                                       gboolean          show_all,
+                                       ...);
+
+gchar *nautilus_file_task_get_basename (GFile *file);
+
+gchar *nautilus_file_task_get_formatted_time (int seconds);
+
+int nautilus_file_task_seconds_count_format_time_units (int seconds);
+
+void nautilus_file_task_inhibit_power_manager (NautilusFileTask *self,
+                                               const char       *message);
+
+#endif
diff --git a/src/tasks/nautilus-file-task.c b/src/tasks/nautilus-file-task.c
new file mode 100644
index 000000000..68a2c86e1
--- /dev/null
+++ b/src/tasks/nautilus-file-task.c
@@ -0,0 +1,642 @@
+/* Copyright (C) 2017 Ernestas Kulik <ernestask gnome org>
+ *
+ * This file is part of Nautilus.
+ *
+ * Nautilus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Nautilus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Nautilus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "nautilus-file-task.h"
+
+#include "nautilus-file-task-private.h"
+#include "nautilus-file-utilities.h"
+
+#include <eel/eel-string.h>
+#include <eel/eel-gtk-extensions.h>
+
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+typedef struct
+{
+    GtkWindow *parent_window;
+    int screen_num;
+    guint inhibit_cookie;
+    NautilusProgressInfo *progress;
+    GCancellable *cancellable;
+    GHashTable *skip_files;
+    GHashTable *skip_readdir_error;
+    NautilusFileUndoInfo *undo_info;
+    gboolean skip_all_error;
+    gboolean skip_all_conflict;
+    gboolean merge_all;
+    gboolean replace_all;
+    gboolean delete_all;
+} NautilusFileTaskPrivate;
+
+G_DEFINE_ABSTRACT_TYPE_WITH_CODE (NautilusFileTask, nautilus_file_task,
+                                  NAUTILUS_TYPE_TASK,
+                                  G_ADD_PRIVATE (NautilusFileTask))
+
+enum
+{
+    PROP_PARENT_WINDOW = 1,
+    N_PROPERTIES
+};
+
+static GParamSpec *properties[N_PROPERTIES] = { NULL };
+
+static void
+execute (NautilusTask *task)
+{
+    NautilusFileTask *file_task;
+    NautilusFileTaskPrivate *priv;
+
+    file_task = NAUTILUS_FILE_TASK (task);
+    priv = nautilus_file_task_get_instance_private (file_task);
+
+    nautilus_progress_info_start (priv->progress);
+
+    NAUTILUS_FILE_TASK_CLASS (G_OBJECT_GET_CLASS (task))->execute (task);
+
+    nautilus_progress_info_finish (priv->progress);
+}
+
+static GObject *
+constructor (GType                  type,
+             guint                  n_construct_properties,
+             GObjectConstructParam *construct_properties)
+{
+    GObjectClass *parent_class;
+    GObject *instance;
+    NautilusFileTask *self;
+    NautilusFileTaskPrivate *priv;
+
+    parent_class = G_OBJECT_CLASS (nautilus_file_task_parent_class);
+    instance = parent_class->constructor (type,
+                                          n_construct_properties,
+                                          construct_properties);
+    self = NAUTILUS_FILE_TASK (instance);
+    priv = nautilus_file_task_get_instance_private (self);
+
+    priv->progress = nautilus_progress_info_new ();
+    priv->cancellable = nautilus_progress_info_get_cancellable (priv->progress);
+
+    g_object_set (instance, "cancellable", priv->cancellable, NULL);
+
+    return instance;
+}
+
+static void
+set_property (GObject      *object,
+              guint         property_id,
+              const GValue *value,
+              GParamSpec   *pspec)
+{
+    switch (property_id)
+    {
+        case PROP_PARENT_WINDOW:
+        {
+            NautilusFileTask *task;
+            NautilusFileTaskPrivate *priv;
+
+            task = NAUTILUS_FILE_TASK (object);
+            priv = nautilus_file_task_get_instance_private (task);
+
+            priv->parent_window = g_value_get_pointer (value);
+
+            g_object_add_weak_pointer (G_OBJECT (priv->parent_window),
+                                       (gpointer *) &priv->parent_window);
+        }
+        break;
+
+        default:
+        {
+            G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+        }
+    }
+}
+
+static void
+finalize (GObject *object)
+{
+    NautilusFileTask *task;
+    NautilusFileTaskPrivate *priv;
+
+    task = NAUTILUS_FILE_TASK (object);
+    priv = nautilus_file_task_get_instance_private (task);
+
+    if (priv->inhibit_cookie != 0)
+    {
+        gtk_application_uninhibit (GTK_APPLICATION (g_application_get_default ()),
+                                   priv->inhibit_cookie);
+    }
+
+    priv->inhibit_cookie = 0;
+
+    if (priv->parent_window != NULL)
+    {
+        g_object_remove_weak_pointer (G_OBJECT (priv->parent_window),
+                                      (gpointer *) &priv->parent_window);
+    }
+
+    if (priv->skip_files != NULL)
+    {
+        g_hash_table_destroy (priv->skip_files);
+    }
+    if (priv->skip_readdir_error != NULL)
+    {
+        g_hash_table_destroy (priv->skip_readdir_error);
+    }
+
+    g_object_unref (priv->progress);
+    g_object_unref (priv->cancellable);
+
+    G_OBJECT_CLASS (nautilus_file_task_parent_class)->finalize (object);
+}
+
+static void
+nautilus_file_task_class_init (NautilusFileTaskClass *klass)
+{
+    GObjectClass *object_class;
+    NautilusTaskClass *task_class;
+
+    object_class = G_OBJECT_CLASS (klass);
+    task_class = NAUTILUS_TASK_CLASS (klass);
+
+    object_class->constructor = constructor;
+    object_class->set_property = set_property;
+    object_class->finalize = finalize;
+
+    task_class->execute = execute;
+
+    properties[PROP_PARENT_WINDOW] =
+        g_param_spec_pointer ("parent-window", "Parent window", "Parent window",
+                              G_PARAM_CONSTRUCT_ONLY | G_PARAM_WRITABLE);
+
+    g_object_class_install_properties (object_class, N_PROPERTIES, properties);
+}
+
+static void
+nautilus_file_task_init (NautilusFileTask *self)
+{
+    NautilusFileTaskPrivate *priv;
+
+    priv = nautilus_file_task_get_instance_private (self);
+
+    priv->inhibit_cookie = 0;
+}
+
+GtkWindow *
+nautilus_file_task_get_parent_window (NautilusFileTask *self)
+{
+    NautilusFileTaskPrivate *priv;
+
+    g_return_val_if_fail (NAUTILUS_IS_FILE_TASK (self), NULL);
+
+    priv = nautilus_file_task_get_instance_private (self);
+
+    return priv->parent_window;
+}
+
+NautilusProgressInfo *
+nautilus_file_task_get_progress_info (NautilusFileTask *self)
+{
+    NautilusFileTaskPrivate *priv;
+
+    g_return_val_if_fail (NAUTILUS_IS_FILE_TASK (self), NULL);
+
+    priv = nautilus_file_task_get_instance_private (self);
+
+    return priv->progress;
+}
+
+#define MAXIMUM_DISPLAYED_FILE_NAME_LENGTH 50
+
+typedef struct
+{
+    GtkWindow **parent_window;
+    gboolean ignore_close_box;
+    GtkMessageType message_type;
+    const char *primary_text;
+    const char *secondary_text;
+    const char *details_text;
+    const char **button_titles;
+    gboolean show_all;
+    int result;
+    /* Dialogs are ran from operation threads, which need to be blocked until
+     * the user gives a valid response
+     */
+    gboolean completed;
+    GMutex mutex;
+    GCond cond;
+} RunSimpleDialogData;
+
+static gboolean
+is_all_button_text (const char *button_text)
+{
+    g_assert (button_text != NULL);
+
+    return !strcmp (button_text, SKIP_ALL) ||
+           !strcmp (button_text, REPLACE_ALL) ||
+           !strcmp (button_text, DELETE_ALL) ||
+           !strcmp (button_text, MERGE_ALL);
+}
+
+
+static gboolean
+do_run_simple_dialog (gpointer _data)
+{
+    RunSimpleDialogData *data = _data;
+    const char *button_title;
+    GtkWidget *dialog;
+    GtkWidget *button;
+    int result;
+    int response_id;
+
+    g_mutex_lock (&data->mutex);
+
+    /* Create the dialog. */
+    dialog = gtk_message_dialog_new (*data->parent_window,
+                                     0,
+                                     data->message_type,
+                                     GTK_BUTTONS_NONE,
+                                     NULL);
+
+    g_object_set (dialog,
+                  "text", data->primary_text,
+                  "secondary-text", data->secondary_text,
+                  NULL);
+
+    for (response_id = 0;
+         data->button_titles[response_id] != NULL;
+         response_id++)
+    {
+        button_title = data->button_titles[response_id];
+        if (!data->show_all && is_all_button_text (button_title))
+        {
+            continue;
+        }
+
+        button = gtk_dialog_add_button (GTK_DIALOG (dialog), button_title, response_id);
+        gtk_dialog_set_default_response (GTK_DIALOG (dialog), response_id);
+
+        if (g_strcmp0(button_title, DELETE) == 0)
+        {
+            gtk_style_context_add_class(gtk_widget_get_style_context(button),
+                                        "destructive-action");
+        }
+    }
+
+    if (data->details_text)
+    {
+        GtkWidget *label;
+        GtkWidget *content_area;
+
+        label = gtk_label_new (data->details_text);
+        content_area = gtk_message_dialog_get_message_area (dialog);
+
+        gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
+        gtk_label_set_selectable (GTK_LABEL (label), TRUE);
+
+        gtk_widget_show (label);
+
+        gtk_container_add (GTK_CONTAINER (content_area), label);
+    }
+
+    /* Run it. */
+    result = gtk_dialog_run (GTK_DIALOG (dialog));
+
+    while ((result == GTK_RESPONSE_NONE || result == GTK_RESPONSE_DELETE_EVENT) && data->ignore_close_box)
+    {
+        result = gtk_dialog_run (GTK_DIALOG (dialog));
+    }
+
+    gtk_widget_destroy (dialog);
+
+    data->result = result;
+    data->completed = TRUE;
+
+    g_cond_signal (&data->cond);
+    g_mutex_unlock (&data->mutex);
+
+    return FALSE;
+}
+
+static int
+run_simple_dialog_va (NautilusFileTask *task,
+                      gboolean          ignore_close_box,
+                      GtkMessageType    message_type,
+                      char             *primary_text,
+                      char             *secondary_text,
+                      const char       *details_text,
+                      gboolean          show_all,
+                      va_list           varargs)
+{
+    NautilusFileTaskPrivate *priv;
+    RunSimpleDialogData *data;
+    int res;
+    const char *button_title;
+    GPtrArray *ptr_array;
+
+    priv = nautilus_file_task_get_instance_private (task);
+
+    data = g_new0 (RunSimpleDialogData, 1);
+    data->parent_window = &priv->parent_window;
+    data->ignore_close_box = ignore_close_box;
+    data->message_type = message_type;
+    data->primary_text = primary_text;
+    data->secondary_text = secondary_text;
+    data->details_text = details_text;
+    data->show_all = show_all;
+    data->completed = FALSE;
+    g_mutex_init (&data->mutex);
+    g_cond_init (&data->cond);
+
+    ptr_array = g_ptr_array_new ();
+    while ((button_title = va_arg (varargs, const char *)) != NULL)
+    {
+        g_ptr_array_add (ptr_array, (char *) button_title);
+    }
+    g_ptr_array_add (ptr_array, NULL);
+    data->button_titles = (const char **) g_ptr_array_free (ptr_array, FALSE);
+
+    nautilus_progress_info_pause (priv->progress);
+
+    g_mutex_lock (&data->mutex);
+
+    g_main_context_invoke (NULL,
+                           do_run_simple_dialog,
+                           data);
+
+    while (!data->completed)
+    {
+        g_cond_wait (&data->cond, &data->mutex);
+    }
+
+    nautilus_progress_info_resume (priv->progress);
+    res = data->result;
+
+    g_mutex_unlock (&data->mutex);
+    g_mutex_clear (&data->mutex);
+    g_cond_clear (&data->cond);
+
+    g_free (data->button_titles);
+    g_free (data);
+
+    g_free (primary_text);
+    g_free (secondary_text);
+
+    return res;
+}
+
+int
+nautilus_file_task_prompt_error (NautilusFileTask *self,
+                                 char             *primary_text,
+                                 char             *secondary_text,
+                                 const char       *details_text,
+                                 gboolean          show_all,
+                                 ...)
+{
+    va_list varargs;
+    int res;
+
+    g_return_val_if_fail (NAUTILUS_IS_FILE_TASK (self), 0);
+
+    va_start (varargs, show_all);
+    res = run_simple_dialog_va (self,
+                                FALSE,
+                                GTK_MESSAGE_ERROR,
+                                primary_text,
+                                secondary_text,
+                                details_text,
+                                show_all,
+                                varargs);
+    va_end (varargs);
+    return res;
+}
+
+int
+nautilus_file_task_prompt_warning (NautilusFileTask  *self,
+                                   char              *primary_text,
+                                   char              *secondary_text,
+                                   const char        *details_text,
+                                   gboolean           show_all,
+                                   ...)
+{
+    va_list varargs;
+    int res;
+
+    g_return_val_if_fail (NAUTILUS_IS_FILE_TASK (self), 0);
+
+    va_start (varargs, show_all);
+    res = run_simple_dialog_va (self,
+                                FALSE,
+                                GTK_MESSAGE_WARNING,
+                                primary_text,
+                                secondary_text,
+                                details_text,
+                                show_all,
+                                varargs);
+    va_end (varargs);
+    return res;
+}
+
+static gboolean
+has_invalid_xml_char (char *str)
+{
+    gunichar c;
+
+    while (*str != 0)
+    {
+        c = g_utf8_get_char (str);
+        /* characters XML permits */
+        if (!(c == 0x9 ||
+              c == 0xA ||
+              c == 0xD ||
+              (c >= 0x20 && c <= 0xD7FF) ||
+              (c >= 0xE000 && c <= 0xFFFD) ||
+              (c >= 0x10000 && c <= 0x10FFFF)))
+        {
+            return TRUE;
+        }
+        str = g_utf8_next_char (str);
+    }
+    return FALSE;
+}
+
+gchar *
+nautilus_file_task_get_basename (GFile *file)
+{
+    GFileInfo *info;
+    gchar *name, *basename, *tmp;
+    GMount *mount;
+
+    if ((mount = nautilus_get_mounted_mount_for_root (file)) != NULL)
+    {
+        name = g_mount_get_name (mount);
+        g_object_unref (mount);
+    }
+    else
+    {
+        info = g_file_query_info (file,
+                                  G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME,
+                                  0,
+                                  g_cancellable_get_current (),
+                                  NULL);
+        name = NULL;
+        if (info)
+        {
+            name = g_strdup (g_file_info_get_display_name (info));
+            g_object_unref (info);
+        }
+    }
+
+    if (name == NULL)
+    {
+        basename = g_file_get_basename (file);
+        if (g_utf8_validate (basename, -1, NULL))
+        {
+            name = basename;
+        }
+        else
+        {
+            name = g_uri_escape_string (basename, G_URI_RESERVED_CHARS_ALLOWED_IN_PATH, TRUE);
+            g_free (basename);
+        }
+    }
+
+    /* Some chars can't be put in the markup we use for the dialogs... */
+    if (has_invalid_xml_char (name))
+    {
+        tmp = name;
+        name = g_uri_escape_string (name, G_URI_RESERVED_CHARS_ALLOWED_IN_PATH, TRUE);
+        g_free (tmp);
+    }
+
+    /* Finally, if the string is too long, truncate it. */
+    if (name != NULL)
+    {
+        tmp = name;
+        name = eel_str_middle_truncate (tmp, MAXIMUM_DISPLAYED_FILE_NAME_LENGTH);
+        g_free (tmp);
+    }
+
+    return name;
+}
+
+gchar *
+nautilus_file_task_get_formatted_time (int seconds)
+{
+    int minutes;
+    int hours;
+    gchar *res;
+
+    if (seconds < 0)
+    {
+        /* Just to make sure... */
+        seconds = 0;
+    }
+
+    if (seconds < 60)
+    {
+        return g_strdup_printf (ngettext ("%'d second", "%'d seconds", (int) seconds), seconds);
+    }
+
+    if (seconds < 60 * 60)
+    {
+        minutes = seconds / 60;
+        return g_strdup_printf (ngettext ("%'d minute", "%'d minutes", minutes), minutes);
+    }
+
+    hours = seconds / (60 * 60);
+
+    if (seconds < 60 * 60 * 4)
+    {
+        gchar *h, *m;
+
+        minutes = (seconds - hours * 60 * 60) / 60;
+
+        h = g_strdup_printf (ngettext ("%'d hour", "%'d hours", hours), hours);
+        m = g_strdup_printf (ngettext ("%'d minute", "%'d minutes", minutes), minutes);
+        res = g_strconcat (h, ", ", m, NULL);
+        g_free (h);
+        g_free (m);
+        return res;
+    }
+
+    return g_strdup_printf (ngettext ("approximately %'d hour",
+                                      "approximately %'d hours",
+                                      hours), hours);
+}
+
+/* keep in time with get_formatted_time ()
+ *
+ * This counts and outputs the number of “time units”
+ * formatted and displayed by get_formatted_time ().
+ * For instance, if get_formatted_time outputs “3 hours, 4 minutes”
+ * it yields 7.
+ */
+int
+nautilus_file_task_seconds_count_format_time_units (int seconds)
+{
+    int minutes;
+    int hours;
+
+    if (seconds < 0)
+    {
+        /* Just to make sure... */
+        seconds = 0;
+    }
+
+    if (seconds < 60)
+    {
+        /* seconds */
+        return seconds;
+    }
+
+    if (seconds < 60 * 60)
+    {
+        /* minutes */
+        minutes = seconds / 60;
+        return minutes;
+    }
+
+    hours = seconds / (60 * 60);
+
+    if (seconds < 60 * 60 * 4)
+    {
+        /* minutes + hours */
+        minutes = (seconds - hours * 60 * 60) / 60;
+        return minutes + hours;
+    }
+
+    return hours;
+}
+
+void
+nautilus_file_task_inhibit_power_manager (NautilusFileTask *self,
+                                          const char       *message)
+{
+    NautilusFileTaskPrivate *priv;
+
+    g_return_if_fail (NAUTILUS_IS_FILE_TASK (self));
+
+    priv = nautilus_file_task_get_instance_private (self);
+
+    priv->inhibit_cookie = gtk_application_inhibit (GTK_APPLICATION (g_application_get_default ()),
+                                                    GTK_WINDOW (priv->parent_window),
+                                                    GTK_APPLICATION_INHIBIT_LOGOUT |
+                                                    GTK_APPLICATION_INHIBIT_SUSPEND,
+                                                    message);
+}
diff --git a/src/tasks/nautilus-file-task.h b/src/tasks/nautilus-file-task.h
new file mode 100644
index 000000000..4b9554f63
--- /dev/null
+++ b/src/tasks/nautilus-file-task.h
@@ -0,0 +1,37 @@
+/* Copyright (C) 2017 Ernestas Kulik <ernestask gnome org>
+ *
+ * This file is part of Nautilus.
+ *
+ * Nautilus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Nautilus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Nautilus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NAUTILUS_FILE_TASK_H
+#define NAUTILUS_FILE_TASK_H
+
+#include "nautilus-task.h"
+
+#define NAUTILUS_TYPE_FILE_TASK (nautilus_file_task_get_type ())
+
+G_DECLARE_DERIVABLE_TYPE (NautilusFileTask, nautilus_file_task,
+                          NAUTILUS, FILE_TASK,
+                          NautilusTask)
+
+struct _NautilusFileTaskClass
+{
+    NautilusTaskClass parent_class;
+
+    void (*execute) (NautilusTask *task);
+};
+
+#endif


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