initial

1 files changed, 378 insertions, 0 deletions

diff --git a/trashapplet/src/trash-empty.c b/trashapplet/src/trash-empty.c
new file mode 100644
index 00000000..1c311e5e
--- /dev/null
+++ b/trashapplet/src/trash-empty.c
@@ -0,0 +1,378 @@
+/*
+ * trash-empty.c: a routine to empty the trash
+ *
+ * Copyright © 2008 Ryan Lortie
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <mateconf/mateconf-client.h>
+#include <gio/gio.h>
+#include <glib/gi18n.h>
+
+#include "trash-empty.h"
+#include "config.h"
+
+/* only one concurrent trash empty operation can occur */
+static GtkDialog          *trash_empty_confirm_dialog;
+static GtkDialog          *trash_empty_dialog;
+static GtkProgressBar     *trash_empty_progress_bar;
+static GtkLabel           *trash_empty_location;
+static GtkLabel           *trash_empty_file;
+
+/* the rules:
+ * 1) nothing here may be modified while trash_empty_update_pending.
+ * 2) an idle may only be scheduled if trash_empty_update_pending.
+ * 3) only the worker may set trash_empty_update_pending = TRUE.
+ * 4) only the UI updater may set trash_empty_update_pending = FALSE.
+ *
+ * i -think- this is threadsafe...  ((famous last words...))
+ */
+static GFile *     volatile trash_empty_current_file;
+static gsize       volatile trash_empty_deleted_files;
+static gsize       volatile trash_empty_total_files;
+static gboolean    volatile trash_empty_update_pending;
+
+static gboolean
+trash_empty_clear_pending (gpointer user_data)
+{
+  trash_empty_update_pending = FALSE;
+
+  return FALSE;
+}
+
+static gboolean
+trash_empty_update_dialog (gpointer user_data)
+{
+  gsize deleted, total;
+  GFile *file;
+
+  g_assert (trash_empty_update_pending);
+
+  deleted = trash_empty_deleted_files;
+  total = trash_empty_total_files;
+  file = trash_empty_current_file;
+
+  /* maybe the done() got processed first. */
+  if (trash_empty_dialog)
+    {
+      char *index_str, *total_str;
+      char *text_tmp, *text;
+      char *tmp;
+
+      /* The i18n tools can't handle a direct embedding of the
+       * size format using a macro. This is a work-around. */
+      index_str = g_strdup_printf ("%"G_GSIZE_FORMAT, deleted + 1);
+      total_str = g_strdup_printf ("%"G_GSIZE_FORMAT, total);
+      /* Translators: the %s in this string should be read as %d. */
+      text = g_strdup_printf (_("Removing item %s of %s"),
+                              index_str, total_str);
+      gtk_progress_bar_set_text (trash_empty_progress_bar, text);
+      g_free (total_str);
+      g_free (index_str);
+      g_free (text);
+
+      if (deleted > total)
+        gtk_progress_bar_set_fraction (trash_empty_progress_bar, 1.0);
+      else
+        gtk_progress_bar_set_fraction (trash_empty_progress_bar,
+                                       (gdouble) deleted / (gdouble) total);
+
+      /* no g_file_get_basename? */
+      {
+        GFile *parent;
+
+        parent = g_file_get_parent (file);
+        text = g_file_get_uri (parent);
+        g_object_unref (parent);
+      }
+      gtk_label_set_text (trash_empty_location, text);
+      g_free (text);
+
+      tmp = g_file_get_basename (file);
+      /* Translators: %s is a file name */
+      text_tmp = g_strdup_printf (_("Removing: %s"), tmp);
+      text = g_markup_printf_escaped ("<i>%s</i>", text_tmp);
+      gtk_label_set_markup (trash_empty_file, text);
+      g_free (text);
+      g_free (text_tmp);
+      g_free (tmp);
+
+      /* unhide the labels */
+      gtk_widget_show_all (GTK_WIDGET (trash_empty_dialog));
+    }
+
+  trash_empty_current_file = NULL;
+  g_object_unref (file);
+
+  trash_empty_update_pending = FALSE;
+
+  return FALSE;
+}
+
+static gboolean
+trash_empty_done (gpointer user_data)
+{
+  gtk_object_destroy (GTK_OBJECT (trash_empty_dialog));
+
+  g_assert (trash_empty_dialog == NULL);
+
+  return FALSE;
+}
+
+/* =============== worker thread code begins here =============== */
+static void
+trash_empty_maybe_schedule_update (GIOSchedulerJob *job,
+                                   GFile           *file,
+                                   gsize            deleted)
+{
+  if (!trash_empty_update_pending)
+    {
+      g_assert (trash_empty_current_file == NULL);
+
+      trash_empty_current_file = g_object_ref (file);
+      trash_empty_deleted_files = deleted;
+
+      trash_empty_update_pending = TRUE;
+      g_io_scheduler_job_send_to_mainloop_async (job,
+                                                 trash_empty_update_dialog,
+                                                 NULL, NULL);
+    }
+}
+
+static void
+trash_empty_delete_contents (GIOSchedulerJob *job,
+                             GCancellable    *cancellable,
+                             GFile           *file,
+                             gboolean         actually_delete,
+                             gsize           *deleted)
+{
+  GFileEnumerator *enumerator;
+  GFileInfo *info;
+  GFile *child;
+
+  if (g_cancellable_is_cancelled (cancellable))
+    return;
+
+  enumerator = g_file_enumerate_children (file,
+                                          G_FILE_ATTRIBUTE_STANDARD_NAME ","
+                                          G_FILE_ATTRIBUTE_STANDARD_TYPE,
+                                          G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                                          cancellable, NULL);
+  if (enumerator)
+    {
+      while ((info = g_file_enumerator_next_file (enumerator,
+                                                  cancellable, NULL)) != NULL)
+        {
+          child = g_file_get_child (file, g_file_info_get_name (info));
+
+          if (g_file_info_get_file_type (info) == G_FILE_TYPE_DIRECTORY)
+            trash_empty_delete_contents (job, cancellable, child,
+                                         actually_delete, deleted);
+
+          if (actually_delete)
+            {
+              trash_empty_maybe_schedule_update (job, child, *deleted);
+              g_file_delete (child, cancellable, NULL);
+            }
+
+          (*deleted)++;
+
+          g_object_unref (child);
+          g_object_unref (info);
+
+          if (g_cancellable_is_cancelled (cancellable))
+            break;
+        }
+
+      g_object_unref (enumerator);
+    }
+}
+
+static gboolean
+trash_empty_job (GIOSchedulerJob *job,
+                 GCancellable    *cancellable,
+                 gpointer         user_data)
+{
+  gsize deleted;
+  GFile *trash;
+
+  trash = g_file_new_for_uri ("trash:///");
+
+  /* first do a dry run to count the number of files */
+  deleted = 0;
+  trash_empty_delete_contents (job, cancellable, trash, FALSE, &deleted);
+  trash_empty_total_files = deleted;
+
+  /* now do the real thing */
+  deleted = 0;
+  trash_empty_delete_contents (job, cancellable, trash, TRUE, &deleted);
+
+  /* done */
+  g_object_unref (trash);
+  g_io_scheduler_job_send_to_mainloop_async (job,
+                                             trash_empty_done,
+                                             NULL, NULL);
+
+  return FALSE;
+}
+/* ================ worker thread code ends here ================ */
+
+static void
+trash_empty_start (GtkWidget *parent)
+{
+  struct { const char *name; gpointer *pointer; } widgets[] =
+    {
+      { "empty_trash",       (gpointer *) &trash_empty_dialog        },
+      { "progressbar",       (gpointer *) &trash_empty_progress_bar  },
+      { "location_label",    (gpointer *) &trash_empty_location      },
+      { "file_label",        (gpointer *) &trash_empty_file          }
+    };
+  GCancellable *cancellable;
+  GtkBuilder *builder;
+  gint i;
+
+  builder = gtk_builder_new ();
+  gtk_builder_add_from_file (builder,
+                             GTK_BUILDERDIR "/trashapplet-empty-progress.ui",
+                             NULL);
+
+  for (i = 0; i < G_N_ELEMENTS (widgets); i++)
+    {
+      GObject *object;
+
+      object = gtk_builder_get_object (builder, widgets[i].name);
+
+      if (object == NULL)
+        {
+          g_critical ("failed to parse trash-empty dialog markup");
+
+          if (trash_empty_dialog)
+            gtk_object_destroy (GTK_OBJECT (trash_empty_dialog));
+
+          g_object_unref (builder);
+          return;
+        }
+
+      *widgets[i].pointer = object;
+      g_object_add_weak_pointer (object, widgets[i].pointer);
+    }
+  g_object_unref (builder);
+
+  cancellable = g_cancellable_new ();
+  g_signal_connect_object (trash_empty_dialog, "response",
+                           G_CALLBACK (g_cancellable_cancel),
+                           cancellable, G_CONNECT_SWAPPED);
+  g_io_scheduler_push_job (trash_empty_job, NULL, NULL, 0, cancellable);
+  g_object_unref (cancellable);
+
+  gtk_window_set_screen (GTK_WINDOW (trash_empty_dialog),
+                         gtk_widget_get_screen (parent));
+  gtk_widget_show (GTK_WIDGET (trash_empty_dialog));
+}
+
+static gboolean
+trash_empty_require_confirmation (void)
+{
+  return mateconf_client_get_bool (mateconf_client_get_default (),
+                                "/apps/caja/preferences/confirm_trash",
+                                NULL);
+}
+
+static void
+trash_empty_confirmation_response (GtkDialog *dialog,
+                                   gint       response_id,
+                                   gpointer   user_data)
+{
+  if (response_id == GTK_RESPONSE_YES)
+    trash_empty_start (GTK_WIDGET (dialog));
+
+  gtk_object_destroy (GTK_OBJECT (dialog));
+  g_assert (trash_empty_confirm_dialog == NULL);
+}
+
+/*
+ * The code in trash_empty_show_confirmation_dialog() was taken from
+ * libcaja-private/caja-file-operations.c (confirm_empty_trash)
+ * by Michiel Sikkes <[email protected]> and adapted for the applet.
+ */
+static void
+trash_empty_show_confirmation_dialog (GtkWidget *parent)
+{
+  GtkWidget *dialog;
+  GtkWidget *button;
+  GdkScreen *screen;
+
+  if (!trash_empty_require_confirmation ())
+    {
+      trash_empty_start (parent);
+      return;
+    }
+
+  screen = gtk_widget_get_screen (parent);
+
+  dialog = gtk_message_dialog_new (NULL, GTK_DIALOG_MODAL,
+                                   GTK_MESSAGE_WARNING,
+                                   GTK_BUTTONS_NONE,
+                                   _("Empty all of the items from "
+                                     "the trash?"));
+  trash_empty_confirm_dialog = GTK_DIALOG (dialog);
+  g_object_add_weak_pointer (G_OBJECT (dialog),
+                             (gpointer *) &trash_empty_confirm_dialog);
+
+  gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
+                                            _("If you choose to empty "
+                                              "the trash, all items in "
+                                              "it will be permanently "
+                                              "lost. Please note that "
+                                              "you can also delete them "
+                                              "separately."));
+
+  gtk_window_set_screen (GTK_WINDOW (dialog), screen);
+  atk_object_set_role (gtk_widget_get_accessible (dialog), ATK_ROLE_ALERT);
+  gtk_window_set_wmclass (GTK_WINDOW (dialog), "empty_trash", "Caja");
+
+  gtk_dialog_add_button (GTK_DIALOG (dialog), GTK_STOCK_CANCEL,
+                         GTK_RESPONSE_CANCEL);
+
+  button = gtk_button_new_with_mnemonic (_("_Empty Trash"));
+  gtk_widget_show (button);
+  gtk_widget_set_can_default (button, TRUE);
+
+  gtk_dialog_add_action_widget (GTK_DIALOG (dialog), button,
+                                GTK_RESPONSE_YES);
+
+  gtk_dialog_set_default_response (GTK_DIALOG (dialog),
+                                   GTK_RESPONSE_YES);
+
+  gtk_widget_show (dialog);
+
+  g_signal_connect (dialog, "response",
+                    G_CALLBACK (trash_empty_confirmation_response), NULL);
+}
+
+void
+trash_empty (GtkWidget *parent)
+{
+  if (trash_empty_confirm_dialog)
+    gtk_window_present (GTK_WINDOW (trash_empty_confirm_dialog));
+  else if (trash_empty_dialog)
+    gtk_window_present (GTK_WINDOW (trash_empty_dialog));
+
+  /* theoretically possible that an update is pending, but very unlikely. */
+  else if (!trash_empty_update_pending)
+    trash_empty_show_confirmation_dialog (parent);
+}