Pileus Git - ~andy/gtk/blob - gtk/gtkpathbar.c

   1 /* gtkpathbar.c
   2  * Copyright (C) 2004  Red Hat, Inc.,  Jonathan Blandford <jrb@gnome.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <config.h>
  21 #include <string.h>
  22 #include "gtkpathbar.h"
  23 #include "gtktogglebutton.h"
  24 #include "gtkalignment.h"
  25 #include "gtkarrow.h"
  26 #include "gtkdnd.h"
  27 #include "gtkimage.h"
  28 #include "gtkintl.h"
  29 #include "gtkicontheme.h"
  30 #include "gtkiconfactory.h"
  31 #include "gtklabel.h"
  32 #include "gtkhbox.h"
  33 #include "gtkmain.h"
  34 #include "gtkmarshalers.h"
  35 #include "gtkalias.h"
  36
  37 enum {
  38   PATH_CLICKED,
  39   LAST_SIGNAL
  40 };
  41
  42 typedef enum {
  43   NORMAL_BUTTON,
  44   ROOT_BUTTON,
  45   HOME_BUTTON,
  46   DESKTOP_BUTTON
  47 } ButtonType;
  48
  49 #define BUTTON_DATA(x) ((ButtonData *)(x))
  50
  51 #define SCROLL_TIMEOUT           150
  52 #define INITIAL_SCROLL_TIMEOUT   300
  53
  54 static guint path_bar_signals [LAST_SIGNAL] = { 0 };
  55
  56 /* Icon size for if we can't get it from the theme */
  57 #define FALLBACK_ICON_SIZE 16
  58
  59 typedef struct _ButtonData ButtonData;
  60
  61 struct _ButtonData
  62 {
  63   GtkWidget *button;
  64   ButtonType type;
  65   char *dir_name;
  66   GtkFilePath *path;
  67   GtkWidget *image;
  68   GtkWidget *label;
  69   guint ignore_changes : 1;
  70   guint file_is_hidden : 1;
  71 };
  72 /* This macro is used to check if a button can be used as a fake root.
  73  * All buttons in front of a fake root are automatically hidden when in a
  74  * directory below a fake root and replaced with the "<" arrow button.
  75  */
  76 #define BUTTON_IS_FAKE_ROOT(button) ((button)->type == HOME_BUTTON)
  77
  78 G_DEFINE_TYPE (GtkPathBar, gtk_path_bar, GTK_TYPE_CONTAINER);
  79
  80 static void gtk_path_bar_finalize                 (GObject          *object);
  81 static void gtk_path_bar_dispose                  (GObject          *object);
  82 static void gtk_path_bar_size_request             (GtkWidget        *widget,
  83                                                    GtkRequisition   *requisition);
  84 static void gtk_path_bar_unmap                    (GtkWidget          *widget);
  85 static void gtk_path_bar_size_allocate            (GtkWidget        *widget,
  86                                                    GtkAllocation    *allocation);
  87 static void gtk_path_bar_add                      (GtkContainer     *container,
  88                                                    GtkWidget        *widget);
  89 static void gtk_path_bar_remove                   (GtkContainer     *container,
  90                                                    GtkWidget        *widget);
  91 static void gtk_path_bar_forall                   (GtkContainer     *container,
  92                                                    gboolean          include_internals,
  93                                                    GtkCallback       callback,
  94                                                    gpointer          callback_data);
  95 static void gtk_path_bar_scroll_up                (GtkWidget        *button,
  96                                                    GtkPathBar       *path_bar);
  97 static void gtk_path_bar_scroll_down              (GtkWidget        *button,
  98                                                    GtkPathBar       *path_bar);
  99 static void gtk_path_bar_stop_scrolling           (GtkPathBar       *path_bar);
 100 static gboolean gtk_path_bar_slider_button_press  (GtkWidget        *widget,
 101                                                    GdkEventButton   *event,
 102                                                    GtkPathBar       *path_bar);
 103 static gboolean gtk_path_bar_slider_button_release(GtkWidget        *widget,
 104                                                    GdkEventButton   *event,
 105                                                    GtkPathBar       *path_bar);
 106 static void gtk_path_bar_grab_notify              (GtkWidget        *widget,
 107                                                    gboolean          was_grabbed);
 108 static void gtk_path_bar_state_changed            (GtkWidget        *widget,
 109                                                    GtkStateType      previous_state);
 110 static void gtk_path_bar_style_set                (GtkWidget        *widget,
 111                                                    GtkStyle         *previous_style);
 112 static void gtk_path_bar_screen_changed           (GtkWidget        *widget,
 113                                                    GdkScreen        *previous_screen);
 114 static void gtk_path_bar_check_icon_theme         (GtkPathBar       *path_bar);
 115 static void gtk_path_bar_update_button_appearance (GtkPathBar       *path_bar,
 116                                                    ButtonData       *button_data,
 117                                                    gboolean          current_dir);
 118
 119 static GtkWidget *
 120 get_slider_button (GtkPathBar  *path_bar,
 121                    GtkArrowType arrow_type)
 122 {
 123   GtkWidget *button;
 124
 125   gtk_widget_push_composite_child ();
 126
 127   button = gtk_button_new ();
 128   gtk_button_set_focus_on_click (button, FALSE);
 129   gtk_container_add (GTK_CONTAINER (button), gtk_arrow_new (arrow_type, GTK_SHADOW_OUT));
 130   gtk_container_add (GTK_CONTAINER (path_bar), button);
 131   gtk_widget_show_all (button);
 132
 133   gtk_widget_pop_composite_child ();
 134
 135   return button;
 136 }
 137
 138 static void
 139 gtk_path_bar_init (GtkPathBar *path_bar)
 140 {
 141   GTK_WIDGET_SET_FLAGS (path_bar, GTK_NO_WINDOW);
 142   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (path_bar), FALSE);
 143
 144   path_bar->spacing = 3;
 145   path_bar->up_slider_button = get_slider_button (path_bar, GTK_ARROW_LEFT);
 146   path_bar->down_slider_button = get_slider_button (path_bar, GTK_ARROW_RIGHT);
 147   path_bar->icon_size = FALLBACK_ICON_SIZE;
 148
 149   g_signal_connect (path_bar->up_slider_button, "clicked", G_CALLBACK (gtk_path_bar_scroll_up), path_bar);
 150   g_signal_connect (path_bar->down_slider_button, "clicked", G_CALLBACK (gtk_path_bar_scroll_down), path_bar);
 151
 152   g_signal_connect (path_bar->up_slider_button, "button_press_event", G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 153   g_signal_connect (path_bar->up_slider_button, "button_release_event", G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 154   g_signal_connect (path_bar->down_slider_button, "button_press_event", G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 155   g_signal_connect (path_bar->down_slider_button, "button_release_event", G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 156 }
 157
 158 static void
 159 gtk_path_bar_class_init (GtkPathBarClass *path_bar_class)
 160 {
 161   GObjectClass *gobject_class;
 162   GtkObjectClass *object_class;
 163   GtkWidgetClass *widget_class;
 164   GtkContainerClass *container_class;
 165
 166   gobject_class = (GObjectClass *) path_bar_class;
 167   object_class = (GtkObjectClass *) path_bar_class;
 168   widget_class = (GtkWidgetClass *) path_bar_class;
 169   container_class = (GtkContainerClass *) path_bar_class;
 170
 171   gobject_class->finalize = gtk_path_bar_finalize;
 172   gobject_class->dispose = gtk_path_bar_dispose;
 173
 174   widget_class->size_request = gtk_path_bar_size_request;
 175   widget_class->unmap = gtk_path_bar_unmap;
 176   widget_class->size_allocate = gtk_path_bar_size_allocate;
 177   widget_class->style_set = gtk_path_bar_style_set;
 178   widget_class->screen_changed = gtk_path_bar_screen_changed;
 179   widget_class->grab_notify = gtk_path_bar_grab_notify;
 180   widget_class->state_changed = gtk_path_bar_state_changed;
 181
 182   container_class->add = gtk_path_bar_add;
 183   container_class->forall = gtk_path_bar_forall;
 184   container_class->remove = gtk_path_bar_remove;
 185   /* FIXME: */
 186   /*  container_class->child_type = gtk_path_bar_child_type;*/
 187
 188   path_bar_signals [PATH_CLICKED] =
 189     g_signal_new (I_("path-clicked"),
 190                   G_OBJECT_CLASS_TYPE (object_class),
 191                   G_SIGNAL_RUN_FIRST,
 192                   G_STRUCT_OFFSET (GtkPathBarClass, path_clicked),
 193                   NULL, NULL,
 194                   _gtk_marshal_VOID__POINTER_POINTER_BOOLEAN,
 195                   G_TYPE_NONE, 3,
 196                   G_TYPE_POINTER,
 197                   G_TYPE_POINTER,
 198                   G_TYPE_BOOLEAN);
 199 }
 200
 201
 202 static void
 203 gtk_path_bar_finalize (GObject *object)
 204 {
 205   GtkPathBar *path_bar;
 206
 207   path_bar = GTK_PATH_BAR (object);
 208
 209   gtk_path_bar_stop_scrolling (path_bar);
 210
 211   g_list_free (path_bar->button_list);
 212   if (path_bar->root_path)
 213     gtk_file_path_free (path_bar->root_path);
 214   if (path_bar->home_path)
 215     gtk_file_path_free (path_bar->home_path);
 216   if (path_bar->desktop_path)
 217     gtk_file_path_free (path_bar->desktop_path);
 218
 219   if (path_bar->root_icon)
 220     g_object_unref (path_bar->root_icon);
 221   if (path_bar->home_icon)
 222     g_object_unref (path_bar->home_icon);
 223   if (path_bar->desktop_icon)
 224     g_object_unref (path_bar->desktop_icon);
 225
 226   if (path_bar->file_system)
 227     g_object_unref (path_bar->file_system);
 228
 229   G_OBJECT_CLASS (gtk_path_bar_parent_class)->finalize (object);
 230 }
 231
 232 /* Removes the settings signal handler.  It's safe to call multiple times */
 233 static void
 234 remove_settings_signal (GtkPathBar *path_bar,
 235                         GdkScreen  *screen)
 236 {
 237   if (path_bar->settings_signal_id)
 238     {
 239       GtkSettings *settings;
 240
 241       settings = gtk_settings_get_for_screen (screen);
 242       g_signal_handler_disconnect (settings,
 243                                    path_bar->settings_signal_id);
 244       path_bar->settings_signal_id = 0;
 245     }
 246 }
 247
 248 static void
 249 gtk_path_bar_dispose (GObject *object)
 250 {
 251   remove_settings_signal (GTK_PATH_BAR (object),
 252                           gtk_widget_get_screen (GTK_WIDGET (object)));
 253
 254   G_OBJECT_CLASS (gtk_path_bar_parent_class)->dispose (object);
 255 }
 256
 257 /* Size requisition:
 258  *
 259  * Ideally, our size is determined by another widget, and we are just filling
 260  * available space.
 261  */
 262 static void
 263 gtk_path_bar_size_request (GtkWidget      *widget,
 264                            GtkRequisition *requisition)
 265 {
 266   ButtonData *button_data;
 267   GtkPathBar *path_bar;
 268   GtkRequisition child_requisition;
 269   GList *list;
 270
 271   path_bar = GTK_PATH_BAR (widget);
 272
 273   requisition->width = 0;
 274   requisition->height = 0;
 275
 276   for (list = path_bar->button_list; list; list = list->next)
 277     {
 278       button_data = BUTTON_DATA (list->data);
 279       gtk_widget_size_request (button_data->button, &child_requisition);
 280       requisition->width = MAX (child_requisition.width, requisition->width);
 281       requisition->height = MAX (child_requisition.height, requisition->height);
 282     }
 283
 284   /* Add space for slider, if we have more than one path */
 285   /* Theoretically, the slider could be bigger than the other button.  But we're
 286    * not going to worry about that now.
 287    */
 288   path_bar->slider_width = MIN(requisition->height * 2 / 3 + 5, requisition->height);
 289   if (path_bar->button_list && path_bar->button_list->next != NULL)
 290     requisition->width += (path_bar->spacing + path_bar->slider_width) * 2;
 291
 292   gtk_widget_size_request (path_bar->up_slider_button, &child_requisition);
 293   gtk_widget_size_request (path_bar->down_slider_button, &child_requisition);
 294
 295   requisition->width += GTK_CONTAINER (widget)->border_width * 2;
 296   requisition->height += GTK_CONTAINER (widget)->border_width * 2;
 297
 298   widget->requisition = *requisition;
 299 }
 300
 301 static void
 302 gtk_path_bar_update_slider_buttons (GtkPathBar *path_bar)
 303 {
 304   if (path_bar->button_list)
 305     {
 306       GtkWidget *button;
 307
 308       button = BUTTON_DATA (path_bar->button_list->data)->button;
 309       if (gtk_widget_get_child_visible (button))
 310         gtk_widget_set_sensitive (path_bar->down_slider_button, FALSE);
 311       else
 312         gtk_widget_set_sensitive (path_bar->down_slider_button, TRUE);
 313
 314       button = BUTTON_DATA (g_list_last (path_bar->button_list)->data)->button;
 315       if (gtk_widget_get_child_visible (button))
 316         gtk_widget_set_sensitive (path_bar->up_slider_button, FALSE);
 317       else
 318         gtk_widget_set_sensitive (path_bar->up_slider_button, TRUE);
 319     }
 320 }
 321
 322 static void
 323 gtk_path_bar_unmap (GtkWidget *widget)
 324 {
 325   gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 326
 327   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unmap (widget);
 328 }
 329
 330 /* This is a tad complicated
 331  */
 332 static void
 333 gtk_path_bar_size_allocate (GtkWidget     *widget,
 334                             GtkAllocation *allocation)
 335 {
 336   GtkWidget *child;
 337   GtkPathBar *path_bar = GTK_PATH_BAR (widget);
 338   GtkTextDirection direction;
 339   GtkAllocation child_allocation;
 340   GList *list, *first_button;
 341   gint width;
 342   gint allocation_width;
 343   gint border_width;
 344   gboolean need_sliders = FALSE;
 345   gint up_slider_offset = 0;
 346   gint down_slider_offset = 0;
 347
 348   widget->allocation = *allocation;
 349
 350   /* No path is set; we don't have to allocate anything. */
 351   if (path_bar->button_list == NULL)
 352     return;
 353
 354   direction = gtk_widget_get_direction (widget);
 355   border_width = (gint) GTK_CONTAINER (path_bar)->border_width;
 356   allocation_width = allocation->width - 2 * border_width;
 357
 358   /* First, we check to see if we need the scrollbars. */
 359   if (path_bar->fake_root)
 360     width = path_bar->spacing + path_bar->slider_width;
 361   else
 362       width = 0;
 363
 364   for (list = path_bar->button_list; list; list = list->next)
 365     {
 366       child = BUTTON_DATA (list->data)->button;
 367
 368       width += child->requisition.width + path_bar->spacing;
 369       if (list == path_bar->fake_root)
 370         break;
 371     }
 372
 373   if (width <= allocation_width)
 374     {
 375       if (path_bar->fake_root)
 376         first_button = path_bar->fake_root;
 377       else
 378         first_button = g_list_last (path_bar->button_list);
 379     }
 380   else
 381     {
 382       gboolean reached_end = FALSE;
 383       gint slider_space = 2 * (path_bar->spacing + path_bar->slider_width);
 384
 385       if (path_bar->first_scrolled_button)
 386         first_button = path_bar->first_scrolled_button;
 387       else
 388         first_button = path_bar->button_list;
 389       need_sliders = TRUE;
 390
 391       /* To see how much space we have, and how many buttons we can display.
 392        * We start at the first button, count forward until hit the new
 393        * button, then count backwards.
 394        */
 395       /* Count down the path chain towards the end. */
 396       width = BUTTON_DATA (first_button->data)->button->requisition.width;
 397       list = first_button->prev;
 398       while (list && !reached_end)
 399         {
 400           child = BUTTON_DATA (list->data)->button;
 401
 402           if (width + child->requisition.width +
 403               path_bar->spacing + slider_space > allocation_width)
 404             reached_end = TRUE;
 405           else if (list == path_bar->fake_root)
 406             break;
 407           else
 408             width += child->requisition.width + path_bar->spacing;
 409
 410           list = list->prev;
 411         }
 412
 413       /* Finally, we walk up, seeing how many of the previous buttons we can
 414        * add */
 415       while (first_button->next && !reached_end)
 416         {
 417           child = BUTTON_DATA (first_button->next->data)->button;
 418
 419           if (width + child->requisition.width + path_bar->spacing + slider_space > allocation_width)
 420             {
 421               reached_end = TRUE;
 422             }
 423           else
 424             {
 425               width += child->requisition.width + path_bar->spacing;
 426               if (first_button == path_bar->fake_root)
 427                 break;
 428               first_button = first_button->next;
 429             }
 430         }
 431     }
 432
 433   /* Now, we allocate space to the buttons */
 434   child_allocation.y = allocation->y + border_width;
 435   child_allocation.height = MAX (1, (gint) allocation->height - border_width * 2);
 436
 437   if (direction == GTK_TEXT_DIR_RTL)
 438     {
 439       child_allocation.x = allocation->x + allocation->width - border_width;
 440       if (need_sliders || path_bar->fake_root)
 441         {
 442           child_allocation.x -= (path_bar->spacing + path_bar->slider_width);
 443           up_slider_offset = allocation->width - border_width - path_bar->slider_width;
 444         }
 445     }
 446   else
 447     {
 448       child_allocation.x = allocation->x + border_width;
 449       if (need_sliders || path_bar->fake_root)
 450         {
 451           up_slider_offset = border_width;
 452           child_allocation.x += (path_bar->spacing + path_bar->slider_width);
 453         }
 454     }
 455
 456   for (list = first_button; list; list = list->prev)
 457     {
 458       child = BUTTON_DATA (list->data)->button;
 459
 460       child_allocation.width = child->requisition.width;
 461       if (direction == GTK_TEXT_DIR_RTL)
 462         child_allocation.x -= child_allocation.width;
 463
 464       /* Check to see if we've don't have any more space to allocate buttons */
 465       if (need_sliders && direction == GTK_TEXT_DIR_RTL)
 466         {
 467           if (child_allocation.x - path_bar->spacing - path_bar->slider_width < widget->allocation.x + border_width)
 468             break;
 469         }
 470       else if (need_sliders && direction == GTK_TEXT_DIR_LTR)
 471         {
 472           if (child_allocation.x + child_allocation.width + path_bar->spacing + path_bar->slider_width >
 473               widget->allocation.x + border_width + allocation_width)
 474             break;
 475         }
 476
 477       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, TRUE);
 478       gtk_widget_size_allocate (child, &child_allocation);
 479
 480       if (direction == GTK_TEXT_DIR_RTL)
 481         {
 482           child_allocation.x -= path_bar->spacing;
 483           down_slider_offset = child_allocation.x - widget->allocation.x - path_bar->slider_width;
 484           down_slider_offset = border_width;
 485         }
 486       else
 487         {
 488           down_slider_offset = child_allocation.x - widget->allocation.x;
 489           down_slider_offset = allocation->width - border_width - path_bar->slider_width;
 490           child_allocation.x += child_allocation.width + path_bar->spacing;
 491         }
 492     }
 493   /* Now we go hide all the widgets that don't fit */
 494   while (list)
 495     {
 496       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 497       list = list->prev;
 498     }
 499   for (list = first_button->next; list; list = list->next)
 500     {
 501       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 502     }
 503
 504   if (need_sliders || path_bar->fake_root)
 505     {
 506       child_allocation.width = path_bar->slider_width;
 507       child_allocation.x = up_slider_offset + allocation->x;
 508       gtk_widget_size_allocate (path_bar->up_slider_button, &child_allocation);
 509
 510       gtk_widget_set_child_visible (path_bar->up_slider_button, TRUE);
 511       gtk_widget_show_all (path_bar->up_slider_button);
 512     }
 513   else
 514     gtk_widget_set_child_visible (path_bar->up_slider_button, FALSE);
 515
 516   if (need_sliders)
 517     {
 518       child_allocation.width = path_bar->slider_width;
 519       child_allocation.x = down_slider_offset + allocation->x;
 520       gtk_widget_size_allocate (path_bar->down_slider_button, &child_allocation);
 521
 522       gtk_widget_set_child_visible (path_bar->down_slider_button, TRUE);
 523       gtk_widget_show_all (path_bar->down_slider_button);
 524       gtk_path_bar_update_slider_buttons (path_bar);
 525     }
 526   else
 527     gtk_widget_set_child_visible (path_bar->down_slider_button, FALSE);
 528 }
 529
 530 static void
 531 gtk_path_bar_style_set (GtkWidget *widget,
 532                         GtkStyle  *previous_style)
 533 {
 534   if (GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_set)
 535     GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_set (widget, previous_style);
 536
 537   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 538 }
 539
 540 static void
 541 gtk_path_bar_screen_changed (GtkWidget *widget,
 542                              GdkScreen *previous_screen)
 543 {
 544   if (GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed)
 545     GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed (widget, previous_screen);
 546
 547   /* We might nave a new settings, so we remove the old one */
 548   if (previous_screen)
 549     remove_settings_signal (GTK_PATH_BAR (widget), previous_screen);
 550
 551   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 552 }
 553
 554 static void
 555 gtk_path_bar_add (GtkContainer *container,
 556                   GtkWidget    *widget)
 557 {
 558   gtk_widget_set_parent (widget, GTK_WIDGET (container));
 559 }
 560
 561 static void
 562 gtk_path_bar_remove_1 (GtkContainer *container,
 563                        GtkWidget    *widget)
 564 {
 565   gboolean was_visible = GTK_WIDGET_VISIBLE (widget);
 566   gtk_widget_unparent (widget);
 567   if (was_visible)
 568     gtk_widget_queue_resize (GTK_WIDGET (container));
 569 }
 570
 571 static void
 572 gtk_path_bar_remove (GtkContainer *container,
 573                      GtkWidget    *widget)
 574 {
 575   GtkPathBar *path_bar;
 576   GList *children;
 577
 578   path_bar = GTK_PATH_BAR (container);
 579
 580   if (widget == path_bar->up_slider_button)
 581     {
 582       gtk_path_bar_remove_1 (container, widget);
 583       path_bar->up_slider_button = NULL;
 584       return;
 585     }
 586
 587   if (widget == path_bar->down_slider_button)
 588     {
 589       gtk_path_bar_remove_1 (container, widget);
 590       path_bar->down_slider_button = NULL;
 591       return;
 592     }
 593
 594   children = path_bar->button_list;
 595   while (children)
 596     {
 597       if (widget == BUTTON_DATA (children->data)->button)
 598         {
 599           gtk_path_bar_remove_1 (container, widget);
 600           path_bar->button_list = g_list_remove_link (path_bar->button_list, children);
 601           g_list_free (children);
 602           return;
 603         }
 604
 605       children = children->next;
 606     }
 607 }
 608
 609 static void
 610 gtk_path_bar_forall (GtkContainer *container,
 611                      gboolean      include_internals,
 612                      GtkCallback   callback,
 613                      gpointer      callback_data)
 614 {
 615   GtkPathBar *path_bar;
 616   GList *children;
 617
 618   g_return_if_fail (callback != NULL);
 619   path_bar = GTK_PATH_BAR (container);
 620
 621   children = path_bar->button_list;
 622   while (children)
 623     {
 624       GtkWidget *child;
 625       child = BUTTON_DATA (children->data)->button;
 626       children = children->next;
 627
 628       (* callback) (child, callback_data);
 629     }
 630
 631   if (path_bar->up_slider_button)
 632     (* callback) (path_bar->up_slider_button, callback_data);
 633
 634   if (path_bar->down_slider_button)
 635     (* callback) (path_bar->down_slider_button, callback_data);
 636 }
 637
 638 static void
 639 gtk_path_bar_scroll_down (GtkWidget *button, GtkPathBar *path_bar)
 640 {
 641   GList *list;
 642   GList *down_button = NULL;
 643   GList *up_button = NULL;
 644   gint space_available;
 645   gint space_needed;
 646   gint border_width;
 647   GtkTextDirection direction;
 648
 649   if (path_bar->ignore_click)
 650     {
 651       path_bar->ignore_click = FALSE;
 652       return;
 653     }
 654
 655   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 656
 657   border_width = GTK_CONTAINER (path_bar)->border_width;
 658   direction = gtk_widget_get_direction (GTK_WIDGET (path_bar));
 659
 660   /* We find the button at the 'down' end that we have to make
 661    * visible */
 662   for (list = path_bar->button_list; list; list = list->next)
 663     {
 664       if (list->next && gtk_widget_get_child_visible (BUTTON_DATA (list->next->data)->button))
 665         {
 666           down_button = list;
 667           break;
 668         }
 669     }
 670
 671   /* Find the last visible button on the 'up' end
 672    */
 673   for (list = g_list_last (path_bar->button_list); list; list = list->prev)
 674     {
 675       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
 676         {
 677           up_button = list;
 678           break;
 679         }
 680     }
 681
 682   space_needed = BUTTON_DATA (down_button->data)->button->allocation.width + path_bar->spacing;
 683   if (direction == GTK_TEXT_DIR_RTL)
 684     space_available = path_bar->down_slider_button->allocation.x - GTK_WIDGET (path_bar)->allocation.x;
 685   else
 686     space_available = (GTK_WIDGET (path_bar)->allocation.x + GTK_WIDGET (path_bar)->allocation.width - border_width) -
 687       (path_bar->down_slider_button->allocation.x + path_bar->down_slider_button->allocation.width);
 688
 689   /* We have space_available extra space that's not being used.  We
 690    * need space_needed space to make the button fit.  So we walk down
 691    * from the end, removing buttons until we get all the space we
 692    * need. */
 693   while (space_available < space_needed)
 694     {
 695       space_available += BUTTON_DATA (up_button->data)->button->allocation.width + path_bar->spacing;
 696       up_button = up_button->prev;
 697       path_bar->first_scrolled_button = up_button;
 698     }
 699 }
 700
 701 static void
 702 gtk_path_bar_scroll_up (GtkWidget *button, GtkPathBar *path_bar)
 703 {
 704   GList *list;
 705
 706   if (path_bar->ignore_click)
 707     {
 708       path_bar->ignore_click = FALSE;
 709       return;
 710     }
 711
 712   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 713
 714   for (list = g_list_last (path_bar->button_list); list; list = list->prev)
 715     {
 716       if (list->prev && gtk_widget_get_child_visible (BUTTON_DATA (list->prev->data)->button))
 717         {
 718           if (list->prev == path_bar->fake_root)
 719             path_bar->fake_root = NULL;
 720           path_bar->first_scrolled_button = list;
 721           return;
 722         }
 723     }
 724 }
 725
 726 static gboolean
 727 gtk_path_bar_scroll_timeout (GtkPathBar *path_bar)
 728 {
 729   gboolean retval = FALSE;
 730
 731   GDK_THREADS_ENTER ();
 732
 733   if (path_bar->timer)
 734     {
 735       if (path_bar->scrolling_up)
 736         gtk_path_bar_scroll_up (path_bar->up_slider_button, path_bar);
 737       else
 738         gtk_path_bar_scroll_down (path_bar->down_slider_button, path_bar);
 739
 740       if (path_bar->need_timer)
 741         {
 742           path_bar->need_timer = FALSE;
 743
 744           path_bar->timer = g_timeout_add (SCROLL_TIMEOUT,
 745                                            (GSourceFunc)gtk_path_bar_scroll_timeout,
 746                                            path_bar);
 747
 748         }
 749       else
 750         retval = TRUE;
 751
 752     }
 753
 754   GDK_THREADS_LEAVE ();
 755
 756   return retval;
 757 }
 758
 759 static void
 760 gtk_path_bar_stop_scrolling (GtkPathBar *path_bar)
 761 {
 762   if (path_bar->timer)
 763     {
 764       g_source_remove (path_bar->timer);
 765       path_bar->timer = 0;
 766       path_bar->need_timer = FALSE;
 767     }
 768 }
 769
 770 static gboolean
 771 gtk_path_bar_slider_button_press (GtkWidget      *widget,
 772                                   GdkEventButton *event,
 773                                   GtkPathBar     *path_bar)
 774 {
 775   if (event->type != GDK_BUTTON_PRESS || event->button != 1)
 776     return FALSE;
 777
 778   path_bar->ignore_click = FALSE;
 779
 780   if (widget == path_bar->up_slider_button)
 781     {
 782       path_bar->scrolling_up = TRUE;
 783       gtk_path_bar_scroll_up (path_bar->up_slider_button, path_bar);
 784     }
 785   else if (widget == path_bar->down_slider_button)
 786     {
 787       path_bar->scrolling_up = FALSE;
 788       gtk_path_bar_scroll_down (path_bar->down_slider_button, path_bar);
 789     }
 790
 791   if (!path_bar->timer)
 792     {
 793       path_bar->need_timer = TRUE;
 794       path_bar->timer = g_timeout_add (INITIAL_SCROLL_TIMEOUT,
 795                                        (GSourceFunc)gtk_path_bar_scroll_timeout,
 796                                        path_bar);
 797     }
 798
 799   return FALSE;
 800 }
 801
 802 static gboolean
 803 gtk_path_bar_slider_button_release (GtkWidget      *widget,
 804                                     GdkEventButton *event,
 805                                     GtkPathBar     *path_bar)
 806 {
 807   if (event->type != GDK_BUTTON_RELEASE)
 808     return FALSE;
 809
 810   path_bar->ignore_click = TRUE;
 811   gtk_path_bar_stop_scrolling (path_bar);
 812
 813   return FALSE;
 814 }
 815
 816 static void
 817 gtk_path_bar_grab_notify (GtkWidget *widget,
 818                           gboolean   was_grabbed)
 819 {
 820   if (!was_grabbed)
 821     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 822 }
 823
 824 static void
 825 gtk_path_bar_state_changed (GtkWidget    *widget,
 826                             GtkStateType  previous_state)
 827 {
 828   if (!GTK_WIDGET_IS_SENSITIVE (widget))
 829     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 830 }
 831
 832
 833 /* Changes the icons wherever it is needed */
 834 static void
 835 reload_icons (GtkPathBar *path_bar)
 836 {
 837   GList *list;
 838
 839   if (path_bar->root_icon)
 840     {
 841       g_object_unref (path_bar->root_icon);
 842       path_bar->root_icon = NULL;
 843     }
 844   if (path_bar->home_icon)
 845     {
 846       g_object_unref (path_bar->home_icon);
 847       path_bar->home_icon = NULL;
 848     }
 849   if (path_bar->desktop_icon)
 850     {
 851       g_object_unref (path_bar->desktop_icon);
 852       path_bar->desktop_icon = NULL;
 853     }
 854
 855   for (list = path_bar->button_list; list; list = list->next)
 856     {
 857       ButtonData *button_data;
 858       gboolean current_dir;
 859
 860       button_data = BUTTON_DATA (list->data);
 861       if (button_data->type != NORMAL_BUTTON)
 862         {
 863           current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button));
 864           gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
 865         }
 866     }
 867
 868 }
 869
 870 static void
 871 change_icon_theme (GtkPathBar *path_bar)
 872 {
 873   GtkSettings *settings;
 874   gint width, height;
 875
 876   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
 877
 878   if (gtk_icon_size_lookup_for_settings (settings, GTK_ICON_SIZE_MENU, &width, &height))
 879     path_bar->icon_size = MAX (width, height);
 880   else
 881     path_bar->icon_size = FALLBACK_ICON_SIZE;
 882
 883   reload_icons (path_bar);
 884 }
 885 /* Callback used when a GtkSettings value changes */
 886 static void
 887 settings_notify_cb (GObject    *object,
 888                     GParamSpec *pspec,
 889                     GtkPathBar *path_bar)
 890 {
 891   const char *name;
 892
 893   name = g_param_spec_get_name (pspec);
 894
 895   if (! strcmp (name, "gtk-icon-theme-name") ||
 896       ! strcmp (name, "gtk-icon-sizes"))
 897     change_icon_theme (path_bar);
 898 }
 899
 900 static void
 901 gtk_path_bar_check_icon_theme (GtkPathBar *path_bar)
 902 {
 903   GtkSettings *settings;
 904
 905   if (path_bar->settings_signal_id)
 906     return;
 907
 908   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
 909   path_bar->settings_signal_id = g_signal_connect (settings, "notify", G_CALLBACK (settings_notify_cb), path_bar);
 910
 911   change_icon_theme (path_bar);
 912 }
 913
 914 /* Public functions and their helpers */
 915 static void
 916 gtk_path_bar_clear_buttons (GtkPathBar *path_bar)
 917 {
 918   while (path_bar->button_list != NULL)
 919     {
 920       gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (path_bar->button_list->data)->button);
 921     }
 922   path_bar->first_scrolled_button = NULL;
 923   path_bar->fake_root = NULL;
 924 }
 925
 926 static void
 927 button_clicked_cb (GtkWidget *button,
 928                    gpointer   data)
 929 {
 930   ButtonData *button_data;
 931   GtkPathBar *path_bar;
 932   GList *button_list;
 933   gboolean child_is_hidden;
 934
 935   button_data = BUTTON_DATA (data);
 936   if (button_data->ignore_changes)
 937     return;
 938
 939   path_bar = GTK_PATH_BAR (button->parent);
 940
 941   button_list = g_list_find (path_bar->button_list, button_data);
 942   g_assert (button_list != NULL);
 943
 944   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
 945
 946   GtkFilePath *child_path;
 947   if (button_list->prev)
 948     {
 949       ButtonData *child_data;
 950
 951       child_data = BUTTON_DATA (button_list->prev->data);
 952       child_path = child_data->path;
 953       child_is_hidden = child_data->file_is_hidden;
 954     }
 955   else
 956     {
 957       child_path = NULL;
 958       child_is_hidden = FALSE;
 959     }
 960
 961   g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0,
 962                  button_data->path, child_path, child_is_hidden);
 963 }
 964
 965 static GdkPixbuf *
 966 get_button_image (GtkPathBar *path_bar,
 967                   ButtonType  button_type)
 968 {
 969   GtkFileSystemVolume *volume;
 970
 971   switch (button_type)
 972     {
 973     case ROOT_BUTTON:
 974
 975       if (path_bar->root_icon != NULL)
 976         return path_bar->root_icon;
 977
 978       volume = gtk_file_system_get_volume_for_path (path_bar->file_system, path_bar->root_path);
 979       if (volume == NULL)
 980         return NULL;
 981
 982       path_bar->root_icon = gtk_file_system_volume_render_icon (path_bar->file_system,
 983                                                                 volume,
 984                                                                 GTK_WIDGET (path_bar),
 985                                                                 path_bar->icon_size,
 986                                                                 NULL);
 987       gtk_file_system_volume_free (path_bar->file_system, volume);
 988
 989       return path_bar->root_icon;
 990     case HOME_BUTTON:
 991       if (path_bar->home_icon != NULL)
 992         return path_bar->home_icon;
 993
 994       path_bar->home_icon = gtk_file_system_render_icon (path_bar->file_system,
 995                                                          path_bar->home_path,
 996                                                          GTK_WIDGET (path_bar),
 997                                                          path_bar->icon_size,
 998                                                          NULL);
 999       return path_bar->home_icon;
1000     case DESKTOP_BUTTON:
1001       if (path_bar->desktop_icon != NULL)
1002         return path_bar->desktop_icon;
1003
1004       path_bar->desktop_icon = gtk_file_system_render_icon (path_bar->file_system,
1005                                                             path_bar->desktop_path,
1006                                                             GTK_WIDGET (path_bar),
1007                                                             path_bar->icon_size,
1008                                                             NULL);
1009       return path_bar->desktop_icon;
1010     default:
1011       return NULL;
1012     }
1013
1014   return NULL;
1015 }
1016
1017 static void
1018 button_data_free (ButtonData *button_data)
1019 {
1020   gtk_file_path_free (button_data->path);
1021   g_free (button_data->dir_name);
1022   g_free (button_data);
1023 }
1024
1025 static const char *
1026 get_dir_name (ButtonData *button_data)
1027 {
1028   return button_data->dir_name;
1029 }
1030
1031 /* We always want to request the same size for the label, whether
1032  * or not the contents are bold
1033  */
1034 static void
1035 label_size_request_cb (GtkWidget      *widget,
1036                        GtkRequisition *requisition,
1037                        ButtonData     *button_data)
1038 {
1039   const gchar *dir_name = get_dir_name (button_data);
1040   PangoLayout *layout = gtk_widget_create_pango_layout (button_data->label, dir_name);
1041   gint bold_width, bold_height;
1042   gchar *markup;
1043
1044   pango_layout_get_pixel_size (layout, &requisition->width, &requisition->height);
1045
1046   markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1047   pango_layout_set_markup (layout, markup, -1);
1048   g_free (markup);
1049
1050   pango_layout_get_pixel_size (layout, &bold_width, &bold_height);
1051   requisition->width = MAX (requisition->width, bold_width);
1052   requisition->height = MAX (requisition->height, bold_height);
1053
1054   g_object_unref (layout);
1055 }
1056
1057 static void
1058 gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
1059                                        ButtonData *button_data,
1060                                        gboolean    current_dir)
1061 {
1062   const gchar *dir_name = get_dir_name (button_data);
1063
1064   if (button_data->label != NULL)
1065     {
1066       if (current_dir)
1067         {
1068           char *markup;
1069
1070           markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1071           gtk_label_set_markup (GTK_LABEL (button_data->label), markup);
1072           g_free (markup);
1073         }
1074       else
1075         {
1076           gtk_label_set_text (GTK_LABEL (button_data->label), dir_name);
1077         }
1078     }
1079
1080   if (button_data->image != NULL)
1081     {
1082       GdkPixbuf *pixbuf;
1083       pixbuf = get_button_image (path_bar, button_data->type);
1084       gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), pixbuf);
1085     }
1086
1087   if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir)
1088     {
1089       button_data->ignore_changes = TRUE;
1090       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir);
1091       button_data->ignore_changes = FALSE;
1092     }
1093 }
1094
1095 static ButtonType
1096 find_button_type (GtkPathBar  *path_bar,
1097                   GtkFilePath *path)
1098 {
1099   if (path_bar->root_path != NULL &&
1100       ! gtk_file_path_compare (path, path_bar->root_path))
1101     return ROOT_BUTTON;
1102   if (path_bar->home_path != NULL &&
1103       ! gtk_file_path_compare (path, path_bar->home_path))
1104     return HOME_BUTTON;
1105   if (path_bar->desktop_path != NULL &&
1106       ! gtk_file_path_compare (path, path_bar->desktop_path))
1107     return DESKTOP_BUTTON;
1108
1109  return NORMAL_BUTTON;
1110 }
1111
1112 static void
1113 button_drag_data_get_cb (GtkWidget          *widget,
1114                          GdkDragContext     *context,
1115                          GtkSelectionData   *selection_data,
1116                          guint               info,
1117                          guint               time_,
1118                          gpointer            data)
1119 {
1120   ButtonData *button_data;
1121   GtkPathBar *path_bar;
1122   char *uri;
1123   char *uri_list;
1124
1125   button_data = data;
1126   path_bar = GTK_PATH_BAR (widget->parent); /* the button's parent *is* the path bar */
1127
1128   uri = gtk_file_system_path_to_uri (path_bar->file_system, button_data->path);
1129   uri_list = g_strconcat (uri, "\r\n", NULL);
1130   g_free (uri);
1131
1132   gtk_selection_data_set (selection_data,
1133                           selection_data->target,
1134                           8,
1135                           uri_list,
1136                           strlen (uri_list));
1137   g_free (uri_list);
1138 }
1139
1140 static ButtonData *
1141 make_directory_button (GtkPathBar  *path_bar,
1142                        const char  *dir_name,
1143                        GtkFilePath *path,
1144                        gboolean     current_dir,
1145                        gboolean     file_is_hidden)
1146 {
1147   const GtkTargetEntry targets[] = {
1148     { "text/uri-list", 0, 0 }
1149   };
1150
1151   GtkWidget *child = NULL;
1152   GtkWidget *label_alignment = NULL;
1153   ButtonData *button_data;
1154
1155   file_is_hidden = !! file_is_hidden;
1156   /* Is it a special button? */
1157   button_data = g_new0 (ButtonData, 1);
1158
1159   button_data->type = find_button_type (path_bar, path);
1160   button_data->button = gtk_toggle_button_new ();
1161   gtk_button_set_focus_on_click (button_data->button, FALSE);
1162
1163   switch (button_data->type)
1164     {
1165     case ROOT_BUTTON:
1166       button_data->image = gtk_image_new ();
1167       child = button_data->image;
1168       button_data->label = NULL;
1169       break;
1170     case HOME_BUTTON:
1171     case DESKTOP_BUTTON:
1172       button_data->image = gtk_image_new ();
1173       button_data->label = gtk_label_new (NULL);
1174       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1175       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1176       child = gtk_hbox_new (FALSE, 2);
1177       gtk_box_pack_start (GTK_BOX (child), button_data->image, FALSE, FALSE, 0);
1178       gtk_box_pack_start (GTK_BOX (child), label_alignment, FALSE, FALSE, 0);
1179       break;
1180     case NORMAL_BUTTON:
1181     default:
1182       button_data->label = gtk_label_new (NULL);
1183       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1184       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1185       child = label_alignment;
1186       button_data->image = NULL;
1187     }
1188
1189   /* label_alignment is created because we can't override size-request
1190    * on label itself and still have the contents of the label centered
1191    * properly in the label's requisition
1192    */
1193   if (label_alignment)
1194     g_signal_connect (label_alignment, "size-request",
1195                       G_CALLBACK (label_size_request_cb), button_data);
1196
1197   button_data->dir_name = g_strdup (dir_name);
1198   button_data->path = gtk_file_path_new_dup (gtk_file_path_get_string (path));
1199   button_data->file_is_hidden = file_is_hidden;
1200
1201   gtk_container_add (GTK_CONTAINER (button_data->button), child);
1202   gtk_widget_show_all (button_data->button);
1203
1204   gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1205
1206   g_signal_connect (button_data->button, "clicked",
1207                     G_CALLBACK (button_clicked_cb),
1208                     button_data);
1209   g_object_weak_ref (G_OBJECT (button_data->button),
1210                      (GWeakNotify) button_data_free, button_data);
1211
1212   gtk_drag_source_set (button_data->button,
1213                        GDK_BUTTON1_MASK,
1214                        targets,
1215                        G_N_ELEMENTS (targets),
1216                        GDK_ACTION_COPY);
1217   g_signal_connect (button_data->button, "drag-data-get",
1218                     G_CALLBACK (button_drag_data_get_cb), button_data);
1219
1220   return button_data;
1221 }
1222
1223 static gboolean
1224 gtk_path_bar_check_parent_path (GtkPathBar         *path_bar,
1225                                 const GtkFilePath  *file_path,
1226                                 GtkFileSystem      *file_system)
1227 {
1228   GList *list;
1229   GList *current_path = NULL;
1230   gboolean need_new_fake_root = FALSE;
1231
1232   for (list = path_bar->button_list; list; list = list->next)
1233     {
1234       ButtonData *button_data;
1235
1236       button_data = list->data;
1237       if (! gtk_file_path_compare (file_path, button_data->path))
1238         {
1239           current_path = list;
1240           break;
1241         }
1242       if (list == path_bar->fake_root)
1243         need_new_fake_root = TRUE;
1244     }
1245
1246   if (current_path)
1247     {
1248       if (need_new_fake_root)
1249         {
1250           path_bar->fake_root = NULL;
1251           for (list = current_path; list; list = list->next)
1252             {
1253               ButtonData *button_data;
1254
1255               button_data = list->data;
1256               if (BUTTON_IS_FAKE_ROOT (button_data))
1257                 {
1258                   path_bar->fake_root = list;
1259                   break;
1260                 }
1261             }
1262         }
1263
1264       for (list = path_bar->button_list; list; list = list->next)
1265         {
1266           gtk_path_bar_update_button_appearance (path_bar,
1267                                                  BUTTON_DATA (list->data),
1268                                                  (list == current_path) ? TRUE : FALSE);
1269         }
1270
1271       if (!gtk_widget_get_child_visible (BUTTON_DATA (current_path->data)->button))
1272         {
1273           path_bar->first_scrolled_button = current_path;
1274           gtk_widget_queue_resize (GTK_WIDGET (path_bar));
1275         }
1276
1277       return TRUE;
1278     }
1279   return FALSE;
1280 }
1281
1282 gboolean
1283 _gtk_path_bar_set_path (GtkPathBar         *path_bar,
1284                         const GtkFilePath  *file_path,
1285                         const gboolean      keep_trail,
1286                         GError            **error)
1287 {
1288   GtkFilePath *path;
1289   gboolean first_directory = TRUE;
1290   gboolean result;
1291   GList *new_buttons = NULL;
1292   GList *fake_root = NULL;
1293
1294   g_return_val_if_fail (GTK_IS_PATH_BAR (path_bar), FALSE);
1295   g_return_val_if_fail (file_path != NULL, FALSE);
1296
1297   result = TRUE;
1298
1299   /* Check whether the new path is already present in the pathbar as buttons.
1300    * This could be a parent directory or a previous selected subdirectory.
1301    */
1302   if (keep_trail &&
1303       gtk_path_bar_check_parent_path (path_bar, file_path, path_bar->file_system))
1304     return TRUE;
1305
1306   path = gtk_file_path_copy (file_path);
1307
1308   gtk_widget_push_composite_child ();
1309
1310   while (path != NULL)
1311     {
1312       GtkFilePath *parent_path = NULL;
1313       ButtonData *button_data;
1314       const gchar *display_name;
1315       gboolean is_hidden;
1316       GtkFileFolder *file_folder;
1317       GtkFileInfo *file_info;
1318       gboolean valid;
1319
1320       valid = gtk_file_system_get_parent (path_bar->file_system,
1321                                           path,
1322                                           &parent_path,
1323                                           error);
1324       if (!valid)
1325         {
1326           result = FALSE;
1327           gtk_file_path_free (path);
1328           break;
1329         }
1330
1331       file_folder = gtk_file_system_get_folder (path_bar->file_system,
1332                                                 parent_path ? parent_path : path,
1333                                                 GTK_FILE_INFO_DISPLAY_NAME | GTK_FILE_INFO_IS_HIDDEN,
1334                                                 NULL);
1335       if (!file_folder)
1336         {
1337           result = FALSE;
1338           gtk_file_path_free (parent_path);
1339           gtk_file_path_free (path);
1340           break;
1341         }
1342
1343       file_info = gtk_file_folder_get_info (file_folder, parent_path ? path : NULL, error);
1344       g_object_unref (file_folder);
1345
1346       if (!file_info)
1347         {
1348           result = FALSE;
1349           gtk_file_path_free (parent_path);
1350           gtk_file_path_free (path);
1351           break;
1352         }
1353
1354       display_name = gtk_file_info_get_display_name (file_info);
1355       is_hidden = gtk_file_info_get_is_hidden (file_info);
1356
1357       button_data = make_directory_button (path_bar, display_name, path, first_directory, is_hidden);
1358       gtk_file_info_free (file_info);
1359       gtk_file_path_free (path);
1360
1361       new_buttons = g_list_prepend (new_buttons, button_data);
1362
1363       if (BUTTON_IS_FAKE_ROOT (button_data))
1364         fake_root = new_buttons;
1365
1366       path = parent_path;
1367       first_directory = FALSE;
1368     }
1369
1370   if (result)
1371     {
1372       GList *l;
1373
1374       gtk_path_bar_clear_buttons (path_bar);
1375       path_bar->button_list = g_list_reverse (new_buttons);
1376       path_bar->fake_root = fake_root;
1377
1378       for (l = path_bar->button_list; l; l = l->next)
1379         {
1380           GtkWidget *button = BUTTON_DATA (l->data)->button;
1381           gtk_container_add (GTK_CONTAINER (path_bar), button);
1382         }
1383     }
1384   else
1385     {
1386       GList *l;
1387
1388       for (l = new_buttons; l; l = l->next)
1389         {
1390           ButtonData *button_data;
1391
1392           button_data = BUTTON_DATA (l->data);
1393           gtk_widget_destroy (button_data->button);
1394         }
1395
1396       g_list_free (new_buttons);
1397     }
1398
1399   gtk_widget_pop_composite_child ();
1400
1401   return result;
1402 }
1403
1404 /* FIXME: This should be a construct-only property */
1405 void
1406 _gtk_path_bar_set_file_system (GtkPathBar    *path_bar,
1407                                GtkFileSystem *file_system)
1408 {
1409   const char *home;
1410   char *desktop;
1411
1412   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1413
1414   g_assert (path_bar->file_system == NULL);
1415
1416   path_bar->file_system = g_object_ref (file_system);
1417
1418   home = g_get_home_dir ();
1419   if (home != NULL)
1420     {
1421       path_bar->home_path = gtk_file_system_filename_to_path (path_bar->file_system, home);
1422       /* FIXME: Need file system backend specific way of getting the
1423        * Desktop path.
1424        */
1425       desktop = g_build_filename (home, "Desktop", NULL);
1426       path_bar->desktop_path = gtk_file_system_filename_to_path (path_bar->file_system, desktop);
1427       g_free (desktop);
1428     }
1429   else
1430     {
1431       path_bar->home_path = NULL;
1432       path_bar->desktop_path = NULL;
1433     }
1434   path_bar->root_path = gtk_file_system_filename_to_path (path_bar->file_system, "/");
1435 }
1436
1437 /**
1438  * _gtk_path_bar_up:
1439  * @path_bar: a #GtkPathBar
1440  *
1441  * If the selected button in the pathbar is not the furthest button "up" (in the
1442  * root direction), act as if the user clicked on the next button up.
1443  **/
1444 void
1445 _gtk_path_bar_up (GtkPathBar *path_bar)
1446 {
1447   GList *l;
1448
1449   for (l = path_bar->button_list; l; l = l->next)
1450     {
1451       GtkWidget *button = BUTTON_DATA (l->data)->button;
1452       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1453         {
1454           if (l->next)
1455             {
1456               GtkWidget *next_button = BUTTON_DATA (l->next->data)->button;
1457               button_clicked_cb (next_button, l->next->data);
1458             }
1459           break;
1460         }
1461     }
1462 }
1463
1464 /**
1465  * _gtk_path_bar_down:
1466  * @path_bar: a #GtkPathBar
1467  *
1468  * If the selected button in the pathbar is not the furthest button "down" (in the
1469  * leaf direction), act as if the user clicked on the next button down.
1470  **/
1471 void
1472 _gtk_path_bar_down (GtkPathBar *path_bar)
1473 {
1474   GList *l;
1475
1476   for (l = path_bar->button_list; l; l = l->next)
1477     {
1478       GtkWidget *button = BUTTON_DATA (l->data)->button;
1479       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1480         {
1481           if (l->prev)
1482             {
1483               GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button;
1484               button_clicked_cb (prev_button, l->prev->data);
1485             }
1486           break;
1487         }
1488     }
1489 }