ROX-Filer/src/usericons.c

   1 /*
   2  * $Id$
   3  *
   4  * ROX-Filer, filer for the ROX desktop project
   5  * Copyright (C) 2002, the ROX-Filer team.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  19  * Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 /* usericons.c - handle user-defined icons. Diego Zamboni, Feb 7, 2001. */
  23
  24 #include "config.h"
  25
  26 #include <gtk/gtk.h>
  27 #include <errno.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <fnmatch.h>
  32 #include <libxml/parser.h>
  33 #include <time.h>
  34
  35 #include "global.h"
  36
  37 #include "fscache.h"
  38 #include "diritem.h"
  39 #include "dir.h"
  40 #include "gui_support.h"
  41 #include "choices.h"
  42 #include "pixmaps.h"
  43 #include "type.h"
  44 #include "run.h"
  45 #include "dnd.h"
  46 #include "support.h"
  47 #include "usericons.h"
  48 #include "main.h"
  49 #include "menu.h"
  50 #include "filer.h"
  51 #include "action.h"
  52 #include "display.h"
  53 #include "xml.h"
  54
  55 #define DELETE_ICON 1
  56
  57 /* Used to index the 'radios' array... */
  58 #define SET_MEDIA 2
  59 #define SET_TYPE 1
  60 #define SET_PATH 0              /* Store in globicons */
  61 #define SET_COPY 3              /* Create .DirIcon */
  62
  63 static GHashTable *glob_icons = NULL; /* Pathname -> Icon pathname */
  64
  65 /* Static prototypes */
  66 static const char *process_globicons_line(gchar *line);
  67 static gboolean free_globicon(gpointer key, gpointer value, gpointer data);
  68 static void get_path_set_icon(GtkWidget *dialog);
  69 static void show_icon_help(gpointer data);
  70 static void write_globicons(void);
  71 static void show_current_dirs_menu(GtkWidget *button, gpointer data);
  72 static void add_globicon(const gchar *path, const gchar *icon);
  73 static void drag_icon_dropped(GtkWidget         *frame,
  74                               GdkDragContext    *context,
  75                               gint              x,
  76                               gint              y,
  77                               GtkSelectionData  *selection_data,
  78                               guint             info,
  79                               guint32           time,
  80                               GtkWidget         *dialog);
  81 static gboolean set_icon_for_type(MIME_type *type, const gchar *iconpath,
  82                                   gboolean just_media);
  83 static void delete_globicon(const gchar *path);
  84 static gboolean convert_to_png(const gchar *src, const gchar *dest);
  85
  86 /****************************************************************
  87  *                      EXTERNAL INTERFACE                      *
  88  ****************************************************************/
  89
  90 /* Read glob-pattern -> icon mappings from "globicons" in Choices */
  91 void read_globicons()
  92 {
  93         static time_t last_read = (time_t) 0;
  94         struct stat info;
  95         guchar *path;
  96         xmlDocPtr doc;
  97
  98         if (!glob_icons)
  99                 glob_icons = g_hash_table_new(g_str_hash, g_str_equal);
 100
 101         path = choices_find_path_load("globicons", PROJECT);
 102         if (!path)
 103                 return; /* Nothing to load */
 104
 105         if (mc_stat(path, &info) == -1)
 106                 goto out;
 107
 108         if (info.st_mtime <= last_read)
 109                 goto out;  /* File hasn't been modified since we last read it */
 110
 111         g_hash_table_foreach_remove(glob_icons, free_globicon, NULL);
 112
 113         doc = xmlParseFile(path);
 114         if (doc)
 115         {
 116                 xmlNodePtr node, icon, root;
 117                 char       *match;
 118
 119                 root = xmlDocGetRootElement(doc);
 120
 121                 /* Handle the new XML file format */
 122                 for (node = root->xmlChildrenNode; node; node = node->next)
 123                 {
 124                         gchar *path, *icon_path;
 125
 126                         if (node->type != XML_ELEMENT_NODE)
 127                                 continue;
 128                         if (strcmp(node->name, "rule") != 0)
 129                                 continue;
 130                         icon = get_subnode(node, NULL, "icon");
 131                         if (!icon)
 132                                 continue;
 133                         match = xmlGetProp(node, "match");
 134                         if (!match)
 135                                 continue;
 136
 137                         icon_path = xmlNodeGetContent(icon);
 138                         path = expand_path(match);
 139                         g_hash_table_insert(glob_icons, path, icon_path);
 140                         g_free(match);
 141                 }
 142
 143                 xmlFreeDoc(doc);
 144         }
 145         else
 146         {
 147                 /* Handle the old non-XML format */
 148                 parse_file(path, process_globicons_line);
 149                 if (g_hash_table_size(glob_icons))
 150                         write_globicons();      /* Upgrade to new format */
 151         }
 152
 153         last_read = time(NULL);   /* Update time stamp */
 154 out:
 155         g_free(path);
 156 }
 157
 158 /* Set an item's image field according to the globicons patterns if
 159  * it matches one of them and the file exists.
 160  */
 161 void check_globicon(const guchar *path, DirItem *item)
 162 {
 163         gchar *gi;
 164
 165         g_return_if_fail(item && !item->image);
 166
 167         gi = g_hash_table_lookup(glob_icons, path);
 168         if (gi)
 169                 item->image = g_fscache_lookup(pixmap_cache, gi);
 170 }
 171
 172 gboolean create_diricon(const guchar *filepath, const guchar *iconpath)
 173 {
 174         if (!convert_to_png(iconpath, make_path(filepath, ".DirIcon")->str))
 175                 return FALSE;
 176
 177         dir_check_this(filepath);
 178
 179         return TRUE;
 180 }
 181
 182 /* Add a globicon mapping for the given file to the given icon path */
 183 gboolean set_icon_path(const guchar *filepath, const guchar *iconpath)
 184 {
 185         struct stat icon;
 186         MaskedPixmap *pic;
 187
 188         /* Check if file exists */
 189         if (mc_stat(iconpath, &icon))
 190         {
 191                 delayed_error(_("The pathname you gave does not exist. "
 192                                     "The icon has not been changed."));
 193                 return FALSE;
 194         }
 195
 196         /* Check if we can load the image, warn the user if not. */
 197         pic = g_fscache_lookup(pixmap_cache, iconpath);
 198         if (!pic)
 199         {
 200                 delayed_error(
 201                         _("Unable to load image file -- maybe it's not in a "
 202                           "format I understand, or maybe the permissions are "
 203                           "wrong?\n"
 204                           "The icon has not been changed."));
 205                 return FALSE;
 206         }
 207         g_object_unref(pic);
 208
 209         /* Add the globicon mapping and update visible icons */
 210         add_globicon(filepath, iconpath);
 211
 212         return TRUE;
 213 }
 214
 215 static void dialog_response(GtkWidget *dialog, gint response, gpointer data)
 216 {
 217         if (response == GTK_RESPONSE_OK)
 218                 get_path_set_icon(dialog);
 219         else if (response == GTK_RESPONSE_CANCEL)
 220                 gtk_widget_destroy(dialog);
 221         else if (response == DELETE_ICON)
 222         {
 223                 const gchar *path;
 224                 gchar *icon_path;
 225
 226                 path = g_object_get_data(G_OBJECT(dialog), "pathname");
 227                 g_return_if_fail(path != NULL);
 228
 229                 delete_globicon(path);
 230
 231                 icon_path = make_path(path, ".DirIcon")->str;
 232                 if (access(icon_path, F_OK) == 0)
 233                 {
 234                         GList *list;
 235
 236                         list = g_list_prepend(NULL, icon_path);
 237                         action_delete(list);
 238                         g_list_free(list);
 239                 }
 240
 241                 gtk_widget_destroy(dialog);
 242         }
 243 }
 244
 245 /* Display a dialog box allowing the user to set the icon for
 246  * a file or directory.
 247  */
 248 void icon_set_handler_dialog(DirItem *item, const guchar *path)
 249 {
 250         struct stat     info;
 251         guchar          *tmp;
 252         GtkDialog       *dialog;
 253         GtkWidget       *frame, *hbox, *vbox2;
 254         GtkWidget       *entry, *label, *button, *align, *icon;
 255         GtkWidget       **radio;
 256         GtkRadioButton  *group;
 257         GtkTargetEntry  targets[] = {
 258                 {"text/uri-list", 0, TARGET_URI_LIST},
 259         };
 260         char    *gi;
 261
 262         g_return_if_fail(item != NULL && path != NULL);
 263
 264         gi = g_hash_table_lookup(glob_icons, path);
 265
 266         dialog = GTK_DIALOG(gtk_dialog_new());
 267         gtk_dialog_set_has_separator(dialog, FALSE);
 268         gtk_window_set_position(GTK_WINDOW(dialog), GTK_WIN_POS_MOUSE);
 269         g_object_set_data_full(G_OBJECT(dialog), "pathname",
 270                                  strdup(path), g_free);
 271
 272         gtk_window_set_title(GTK_WINDOW(dialog), _("Set icon"));
 273
 274         radio = g_new(GtkWidget *, 4);
 275
 276         tmp = g_strdup_printf(_("Set icon for all `%s/<anything>'"),
 277                         item->mime_type->media_type);
 278         radio[SET_MEDIA] = gtk_radio_button_new_with_label(NULL, tmp);
 279         gtk_box_pack_start(GTK_BOX(dialog->vbox),
 280                         radio[SET_MEDIA], FALSE, TRUE, 0);
 281         g_free(tmp);
 282         group = GTK_RADIO_BUTTON(radio[SET_MEDIA]);
 283
 284         tmp = g_strdup_printf(_("Only for the type `%s/%s'"),
 285                         item->mime_type->media_type,
 286                         item->mime_type->subtype);
 287         radio[SET_TYPE] = gtk_radio_button_new_with_label_from_widget(group,
 288                                                                         tmp);
 289         gtk_box_pack_start(GTK_BOX(dialog->vbox), radio[SET_TYPE],
 290                         FALSE, TRUE, 0);
 291         g_free(tmp);
 292
 293         tmp = g_strdup_printf(_("Only for the file `%s'"), path);
 294         radio[SET_PATH] = gtk_radio_button_new_with_label_from_widget(group,
 295                                                                         tmp);
 296         gtk_box_pack_start(GTK_BOX(dialog->vbox), radio[SET_PATH],
 297                         FALSE, TRUE, 0);
 298         gtk_tooltips_set_tip(tooltips, radio[SET_PATH],
 299                         _("Add the file and image filenames to your "
 300                         "personal list. The setting will be lost if the image "
 301                         "or the file is moved."), NULL);
 302         g_free(tmp);
 303         gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(radio[SET_PATH]), TRUE);
 304
 305         /* If it's a directory, offer to create a .DirIcon */
 306         if (mc_stat(path, &info) == 0 && S_ISDIR(info.st_mode))
 307         {
 308                 radio[3] = gtk_radio_button_new_with_label_from_widget(
 309                                         group, _("Copy image into directory"));
 310                 gtk_box_pack_start(GTK_BOX(dialog->vbox), radio[SET_COPY],
 311                                         FALSE, TRUE, 0);
 312                 gtk_tooltips_set_tip(tooltips, radio[SET_COPY],
 313                         _("Copy the image inside the directory, as "
 314                         "a hidden file called '.DirIcon'. "
 315                         "All users will then see the "
 316                         "icon, and you can move the directory around safely. "
 317                         "This is usually the best option if you can write to "
 318                         "the directory."), NULL);
 319
 320                 if (access(path, W_OK) == 0)
 321                         gtk_toggle_button_set_active(
 322                                         GTK_TOGGLE_BUTTON(radio[SET_COPY]),
 323                                         TRUE);
 324         }
 325         else
 326                 radio[SET_COPY] = NULL;
 327
 328         g_object_set_data_full(G_OBJECT(dialog), "radios", radio, g_free);
 329         g_object_set_data(G_OBJECT(dialog), "mime_type", item->mime_type);
 330
 331         frame = gtk_frame_new(NULL);
 332         gtk_box_pack_start(GTK_BOX(dialog->vbox), frame, TRUE, TRUE, 4);
 333         gtk_frame_set_shadow_type(GTK_FRAME(frame), GTK_SHADOW_IN);
 334         gtk_container_set_border_width(GTK_CONTAINER(frame), 4);
 335
 336         gtk_drag_dest_set(frame, GTK_DEST_DEFAULT_ALL,
 337                         targets, sizeof(targets) / sizeof(*targets),
 338                         GDK_ACTION_COPY);
 339         g_signal_connect(frame, "drag_data_received",
 340                         G_CALLBACK(drag_icon_dropped), dialog);
 341
 342         vbox2 = gtk_vbox_new(FALSE, 0);
 343         gtk_container_add(GTK_CONTAINER(frame), vbox2);
 344
 345         label = gtk_label_new(_("Drop an icon file here"));
 346         gtk_misc_set_padding(GTK_MISC(label), 10, 10);
 347         gtk_box_pack_start(GTK_BOX(vbox2), label, TRUE, TRUE, 0);
 348         align = gtk_alignment_new(1, 1, 0, 0);
 349         gtk_box_pack_start(GTK_BOX(vbox2), align, FALSE, TRUE, 0);
 350         button = gtk_button_new();
 351         gtk_container_add(GTK_CONTAINER(align), button);
 352         icon = gtk_image_new_from_pixbuf(im_dirs->pixbuf);
 353         gtk_container_add(GTK_CONTAINER(button), icon);
 354         gtk_tooltips_set_tip(tooltips, button,
 355                         _("Menu of directories previously used for icons"),
 356                         NULL);
 357         g_signal_connect(button, "clicked",
 358                         G_CALLBACK(show_current_dirs_menu), NULL);
 359
 360         hbox = gtk_hbox_new(FALSE, 4);
 361         gtk_box_pack_start(GTK_BOX(dialog->vbox), hbox, FALSE, TRUE, 4);
 362         gtk_box_pack_start(GTK_BOX(hbox), gtk_hseparator_new(), TRUE, TRUE, 0);
 363         gtk_box_pack_start(GTK_BOX(hbox), gtk_label_new(_("OR")),
 364                                                 FALSE, TRUE, 0);
 365         gtk_box_pack_start(GTK_BOX(hbox), gtk_hseparator_new(), TRUE, TRUE, 0);
 366
 367         hbox = gtk_hbox_new(FALSE, 4);
 368         gtk_box_pack_start(GTK_BOX(dialog->vbox), hbox, FALSE, TRUE, 0);
 369
 370         label = gtk_label_new(_("Enter the path of an icon file:")),
 371         gtk_misc_set_alignment(GTK_MISC(label), 0, .5);
 372         gtk_box_pack_start(GTK_BOX(hbox), label, TRUE, TRUE, 4);
 373
 374         gtk_box_pack_start(GTK_BOX(hbox),
 375                         new_help_button(show_icon_help, NULL), FALSE, TRUE, 0);
 376
 377         entry = gtk_entry_new();
 378         /* Set the current icon as the default text if there is one */
 379         if (gi)
 380                 gtk_entry_set_text(GTK_ENTRY(entry), gi);
 381
 382         gtk_box_pack_start(GTK_BOX(dialog->vbox), entry, FALSE, TRUE, 0);
 383         gtk_widget_grab_focus(entry);
 384         g_object_set_data(G_OBJECT(dialog), "icon_path", entry);
 385         gtk_entry_set_activates_default(GTK_ENTRY(entry), TRUE);
 386
 387         button = button_new_mixed(GTK_STOCK_DELETE, _("_Remove"));
 388         GTK_WIDGET_SET_FLAGS(button, GTK_CAN_DEFAULT);
 389         gtk_dialog_add_action_widget(dialog, button, DELETE_ICON);
 390         gtk_dialog_add_buttons(dialog,
 391                         GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
 392                         GTK_STOCK_OK, GTK_RESPONSE_OK,
 393                         NULL);
 394         g_signal_connect(dialog, "response", G_CALLBACK(dialog_response), NULL);
 395         gtk_dialog_set_default_response(dialog, GTK_RESPONSE_OK);
 396
 397         gtk_widget_show_all(GTK_WIDGET(dialog));
 398 }
 399
 400
 401 /****************************************************************
 402  *                      INTERNAL FUNCTIONS                      *
 403  ****************************************************************/
 404
 405 static gboolean free_globicon(gpointer key, gpointer value, gpointer data)
 406 {
 407         g_free(key);
 408         g_free(value);
 409
 410         return TRUE;            /* For g_hash_table_foreach_remove() */
 411 }
 412
 413 static void write_globicon(gpointer key, gpointer value, gpointer data)
 414 {
 415         xmlNodePtr doc = (xmlNodePtr) data;
 416         xmlNodePtr tree;
 417
 418         tree = xmlNewTextChild(doc, NULL, "rule", NULL);
 419         xmlSetProp(tree, "match", key);
 420         xmlNewChild(tree, NULL, "icon", value);
 421 }
 422
 423 /* Write globicons file */
 424 static void write_globicons(void)
 425 {
 426         gchar *save = NULL, *save_new = NULL;
 427         xmlDocPtr doc = NULL;
 428
 429         save = choices_find_path_save("globicons", PROJECT, TRUE);
 430
 431         if (!save)
 432                 return;         /* Saving is disabled */
 433
 434         save_new = g_strconcat(save, ".new", NULL);
 435
 436         doc = xmlNewDoc("1.0");
 437         xmlDocSetRootElement(doc,
 438                              xmlNewDocNode(doc, NULL, "special-files", NULL));
 439
 440         g_hash_table_foreach(glob_icons, write_globicon,
 441                              xmlDocGetRootElement(doc));
 442
 443         if (save_xml_file(doc, save_new) || rename(save_new, save))
 444                 delayed_error(_("Error saving %s: %s"),
 445                                 save, g_strerror(errno));
 446
 447         g_free(save_new);
 448         g_free(save);
 449
 450         if (doc)
 451                 xmlFreeDoc(doc);
 452 }
 453
 454 /* Process a globicon line. Format:
 455         glob-pattern    icon-path
 456    Example:
 457        /home/<*>/Mail   /usr/local/icons/mailbox.xpm
 458          (<*> represents a single asterisk, enclosed in brackets to not break
 459          the C comment).
 460 */
 461 static const char *process_globicons_line(gchar *line)
 462 {
 463         guchar *pattern, *iconpath;
 464
 465         pattern = strtok(line, " \t");
 466         /* We ignore empty lines, but they are no cause for a message */
 467         if (pattern == NULL)
 468                 return NULL;
 469
 470         iconpath = strtok(NULL, " \t");
 471
 472         /* If there is no icon, then we worry */
 473         g_return_val_if_fail(iconpath != NULL,
 474                         "Invalid line in globicons: no icon specified");
 475
 476         g_hash_table_insert(glob_icons, g_strdup(pattern), g_strdup(iconpath));
 477
 478         return NULL;
 479 }
 480
 481 /* Add a globicon entry to the list. If another one with the same
 482  * path exists, it is replaced. Otherwise, the new entry is
 483  * added to the top of the list (so that it takes precedence over
 484  * other entries).
 485  */
 486 static void add_globicon(const gchar *path, const gchar *icon)
 487 {
 488         g_hash_table_insert(glob_icons, g_strdup(path), g_strdup(icon));
 489
 490         /* Rewrite the globicons file */
 491         write_globicons();
 492
 493         /* Make sure any visible icons for the file are updated */
 494         examine(path);
 495 }
 496
 497 /* Remove the globicon for a certain path */
 498 static void delete_globicon(const gchar *path)
 499 {
 500         gpointer key, value;
 501
 502         if (!g_hash_table_lookup_extended(glob_icons, path, &key, &value))
 503                 return;
 504
 505         g_hash_table_remove(glob_icons, path);
 506
 507         g_free(key);
 508         g_free(value);
 509
 510         write_globicons();
 511         examine(path);
 512 }
 513
 514 /* Set the icon for this dialog's file to 'icon' */
 515 static void do_set_icon(GtkWidget *dialog, const gchar *icon)
 516 {
 517         guchar  *path = NULL;
 518         GtkToggleButton **radio;
 519
 520         path = g_object_get_data(G_OBJECT(dialog), "pathname");
 521         g_return_if_fail(path != NULL);
 522
 523         radio = g_object_get_data(G_OBJECT(dialog), "radios");
 524         g_return_if_fail(radio != NULL);
 525
 526         if (gtk_toggle_button_get_active(radio[0]))
 527         {
 528                 if (!set_icon_path(path, icon))
 529                         return;
 530         }
 531         else if (radio[SET_COPY] &&
 532                         gtk_toggle_button_get_active(radio[SET_COPY]))
 533         {
 534                 if (!create_diricon(path, icon))
 535                         return;
 536         }
 537         else
 538         {
 539                 gboolean just_media;
 540                 MIME_type *type;
 541
 542                 type = g_object_get_data(G_OBJECT(dialog), "mime_type");
 543                 just_media = gtk_toggle_button_get_active(radio[2]);
 544
 545                 if (!set_icon_for_type(type, icon, just_media))
 546                         return;
 547         }
 548
 549         destroy_on_idle(dialog);
 550 }
 551
 552 /* Called when a URI list is dropped onto the box in the Set Icon
 553  * dialog. Make that the default icon.
 554  */
 555 static void drag_icon_dropped(GtkWidget         *frame,
 556                               GdkDragContext    *context,
 557                               gint              x,
 558                               gint              y,
 559                               GtkSelectionData  *selection_data,
 560                               guint             info,
 561                               guint32           time,
 562                               GtkWidget         *dialog)
 563 {
 564         GList   *uris, *next;
 565         guchar  *icon = NULL;
 566
 567         if (!selection_data->data)
 568                 return;
 569
 570         uris = uri_list_to_glist(selection_data->data);
 571
 572         if (g_list_length(uris) == 1)
 573                 icon = g_strdup(get_local_path((guchar *) uris->data));
 574
 575         for (next = uris; next; next = next->next)
 576                 g_free(next->data);
 577         g_list_free(uris);
 578
 579         if (!icon)
 580         {
 581                 delayed_error(_("You should drop a single local icon file "
 582                                     "onto the drop box - that icon will be "
 583                                     "used for this file from now on."));
 584                 return;
 585         }
 586
 587         do_set_icon(dialog, icon);
 588
 589         g_free(icon);
 590 }
 591
 592 /* Called if the user clicks on the OK button on the Set Icon dialog */
 593 static void get_path_set_icon(GtkWidget *dialog)
 594 {
 595         GtkEntry *entry;
 596         const gchar *icon;
 597
 598         entry = g_object_get_data(G_OBJECT(dialog), "icon_path");
 599         g_return_if_fail(entry != NULL);
 600
 601         icon = gtk_entry_get_text(entry);
 602
 603         do_set_icon(dialog, icon);
 604 }
 605
 606 static void show_icon_help(gpointer data)
 607 {
 608         info_message(
 609                 _("Enter the full path of a file that contains a valid "
 610                   "image to be used as the icon for this file or directory."));
 611 }
 612
 613 /* Set the icon for the given MIME type.  We copy the file. */
 614 static gboolean set_icon_for_type(MIME_type *type, const gchar *iconpath,
 615                                   gboolean just_media)
 616 {
 617         gchar *target;
 618         gchar *leaf;
 619
 620         if (just_media)
 621                 leaf = g_strconcat(type->media_type, ".png", NULL);
 622         else
 623                 leaf = g_strconcat(type->media_type, "_", type->subtype,
 624                                                                 ".png", NULL);
 625
 626         target = choices_find_path_save(leaf, "MIME-icons", TRUE);
 627         g_free(leaf);
 628
 629         if (!target)
 630         {
 631                 delayed_error(_("Setting icon disabled by CHOICESPATH"));
 632                 return FALSE;
 633         }
 634
 635         if (!convert_to_png(iconpath, target))
 636         {
 637                 g_free(target);
 638                 return FALSE;
 639         }
 640
 641         g_free(target);
 642
 643         return TRUE;
 644 }
 645
 646 static void get_dir(gpointer key, gpointer value, gpointer data)
 647 {
 648         GHashTable *names = (GHashTable *) data;
 649         gchar *dir;
 650
 651         dir = g_dirname(value); /* Freed in add_dir_to_menu */
 652         if (dir)
 653         {
 654                 g_hash_table_insert(names, dir, NULL);
 655         }
 656 }
 657
 658 static void open_icon_dir(GtkMenuItem *item, gpointer data)
 659 {
 660         FilerWindow *filer;
 661         const char *dir;
 662
 663         dir = gtk_label_get_text(GTK_LABEL(GTK_BIN(item)->child));
 664         filer = filer_opendir(dir, NULL);
 665         if (filer)
 666                 display_set_thumbs(filer, TRUE);
 667 }
 668
 669 static void add_dir_to_menu(gpointer key, gpointer value, gpointer data)
 670 {
 671         GtkMenuShell *menu = (GtkMenuShell *) data;
 672         GtkWidget *item;
 673
 674         item = gtk_menu_item_new_with_label(key);
 675         gtk_widget_set_accel_path(item, NULL, NULL);    /* XXX */
 676         g_signal_connect(item, "activate",
 677                         G_CALLBACK(open_icon_dir), NULL);
 678         g_free(key);
 679         gtk_menu_shell_append(menu, item);
 680 }
 681
 682 static void show_current_dirs_menu(GtkWidget *button, gpointer data)
 683 {
 684         GHashTable *names;
 685         GtkWidget *menu;
 686
 687         names = g_hash_table_new(g_str_hash, g_str_equal);
 688
 689         g_hash_table_foreach(glob_icons, get_dir, names);
 690         if (g_hash_table_size(glob_icons) == 0)
 691         {
 692                 /* TODO: Include MIME-icons? */
 693                 delayed_error(_("You have not yet set any special icons; "
 694                         "therefore, I have no directories to show you"));
 695                 return;
 696         }
 697
 698         menu = gtk_menu_new();
 699
 700         g_hash_table_foreach(names, add_dir_to_menu, menu);
 701
 702         g_hash_table_destroy(names);
 703
 704         show_popup_menu(menu, gtk_get_current_event(), 0);
 705 }
 706
 707 /* Load image 'src', and save it as an icon-sized image in png format.
 708  * TRUE on success, error is already reported on failure.
 709  */
 710 static gboolean convert_to_png(const gchar *src, const gchar *dest)
 711 {
 712         MaskedPixmap *pic;
 713         GError  *error = NULL;
 714
 715         pic = g_fscache_lookup(pixmap_cache, src);
 716         if (!pic)
 717         {
 718                 delayed_error(
 719                         _("Unable to load image file -- maybe it's not in a "
 720                           "format I understand, or maybe the permissions are "
 721                           "wrong?\n"
 722                           "The icon has not been changed."));
 723                 return FALSE;
 724         }
 725
 726         gdk_pixbuf_save(pic->src_pixbuf, dest,
 727                         "png", &error,
 728                         "tEXt::Software", PROJECT,
 729                         NULL);
 730         g_object_unref(pic);
 731
 732         if (error)
 733         {
 734                 delayed_error(_("Error creating image '%s':\n%s"),
 735                                 dest, error->message);
 736                 g_error_free(error);
 737                 return FALSE;
 738         }
 739
 740         return TRUE;
 741 }