summaryrefslogtreecommitdiff
path: root/trashapplet/src/trash-empty.c
blob: de298d28bae836ee2d0bb54c4543d43ca15fe957 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
/*
 * 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., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#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_widget_destroy (GTK_WIDGET (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_widget_destroy (GTK_WIDGET (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)
{
  gboolean confirm_trash;
  GSettings *settings;
  settings = g_settings_new ("org.mate.caja.preferences");
  confirm_trash = g_settings_get_boolean (settings, "confirm-trash");
  g_object_unref (settings);
  return confirm_trash;
}

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_widget_destroy (GTK_WIDGET (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 <michiel@eyesopened.nl> 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_dialog_add_button (GTK_DIALOG (dialog), "gtk-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);
}