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 if (path_bar->scrolling_down)
 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_down = FALSE;
 783       path_bar->scrolling_up = TRUE;
 784       gtk_path_bar_scroll_up (path_bar->up_slider_button, path_bar);
 785     }
 786   else if (widget == path_bar->down_slider_button)
 787     {
 788       path_bar->scrolling_up = FALSE;
 789       path_bar->scrolling_down = TRUE;
 790       gtk_path_bar_scroll_down (path_bar->down_slider_button, path_bar);
 791     }
 792
 793   if (!path_bar->timer)
 794     {
 795       path_bar->need_timer = TRUE;
 796       path_bar->timer = g_timeout_add (INITIAL_SCROLL_TIMEOUT,
 797                                        (GSourceFunc)gtk_path_bar_scroll_timeout,
 798                                        path_bar);
 799     }
 800
 801   return FALSE;
 802 }
 803
 804 static gboolean
 805 gtk_path_bar_slider_button_release (GtkWidget      *widget,
 806                                     GdkEventButton *event,
 807                                     GtkPathBar     *path_bar)
 808 {
 809   if (event->type != GDK_BUTTON_RELEASE)
 810     return FALSE;
 811
 812   path_bar->ignore_click = TRUE;
 813   gtk_path_bar_stop_scrolling (path_bar);
 814
 815   return FALSE;
 816 }
 817
 818 static void
 819 gtk_path_bar_grab_notify (GtkWidget *widget,
 820                           gboolean   was_grabbed)
 821 {
 822   if (!was_grabbed)
 823     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 824 }
 825
 826 static void
 827 gtk_path_bar_state_changed (GtkWidget    *widget,
 828                             GtkStateType  previous_state)
 829 {
 830   if (!GTK_WIDGET_IS_SENSITIVE (widget))
 831     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 832 }
 833
 834
 835 /* Changes the icons wherever it is needed */
 836 static void
 837 reload_icons (GtkPathBar *path_bar)
 838 {
 839   GList *list;
 840
 841   if (path_bar->root_icon)
 842     {
 843       g_object_unref (path_bar->root_icon);
 844       path_bar->root_icon = NULL;
 845     }
 846   if (path_bar->home_icon)
 847     {
 848       g_object_unref (path_bar->home_icon);
 849       path_bar->home_icon = NULL;
 850     }
 851   if (path_bar->desktop_icon)
 852     {
 853       g_object_unref (path_bar->desktop_icon);
 854       path_bar->desktop_icon = NULL;
 855     }
 856
 857   for (list = path_bar->button_list; list; list = list->next)
 858     {
 859       ButtonData *button_data;
 860       gboolean current_dir;
 861
 862       button_data = BUTTON_DATA (list->data);
 863       if (button_data->type != NORMAL_BUTTON)
 864         {
 865           current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button));
 866           gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
 867         }
 868     }
 869
 870 }
 871
 872 static void
 873 change_icon_theme (GtkPathBar *path_bar)
 874 {
 875   GtkSettings *settings;
 876   gint width, height;
 877
 878   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
 879
 880   if (gtk_icon_size_lookup_for_settings (settings, GTK_ICON_SIZE_MENU, &width, &height))
 881     path_bar->icon_size = MAX (width, height);
 882   else
 883     path_bar->icon_size = FALLBACK_ICON_SIZE;
 884
 885   reload_icons (path_bar);
 886 }
 887 /* Callback used when a GtkSettings value changes */
 888 static void
 889 settings_notify_cb (GObject    *object,
 890                     GParamSpec *pspec,
 891                     GtkPathBar *path_bar)
 892 {
 893   const char *name;
 894
 895   name = g_param_spec_get_name (pspec);
 896
 897   if (! strcmp (name, "gtk-icon-theme-name") ||
 898       ! strcmp (name, "gtk-icon-sizes"))
 899     change_icon_theme (path_bar);
 900 }
 901
 902 static void
 903 gtk_path_bar_check_icon_theme (GtkPathBar *path_bar)
 904 {
 905   GtkSettings *settings;
 906
 907   if (path_bar->settings_signal_id)
 908     return;
 909
 910   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
 911   path_bar->settings_signal_id = g_signal_connect (settings, "notify", G_CALLBACK (settings_notify_cb), path_bar);
 912
 913   change_icon_theme (path_bar);
 914 }
 915
 916 /* Public functions and their helpers */
 917 static void
 918 gtk_path_bar_clear_buttons (GtkPathBar *path_bar)
 919 {
 920   while (path_bar->button_list != NULL)
 921     {
 922       gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (path_bar->button_list->data)->button);
 923     }
 924   path_bar->first_scrolled_button = NULL;
 925   path_bar->fake_root = NULL;
 926 }
 927
 928 static void
 929 button_clicked_cb (GtkWidget *button,
 930                    gpointer   data)
 931 {
 932   ButtonData *button_data;
 933   GtkPathBar *path_bar;
 934   GList *button_list;
 935   gboolean child_is_hidden;
 936   GtkFilePath *child_path;
 937
 938   button_data = BUTTON_DATA (data);
 939   if (button_data->ignore_changes)
 940     return;
 941
 942   path_bar = GTK_PATH_BAR (button->parent);
 943
 944   button_list = g_list_find (path_bar->button_list, button_data);
 945   g_assert (button_list != NULL);
 946
 947   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
 948
 949   if (button_list->prev)
 950     {
 951       ButtonData *child_data;
 952
 953       child_data = BUTTON_DATA (button_list->prev->data);
 954       child_path = child_data->path;
 955       child_is_hidden = child_data->file_is_hidden;
 956     }
 957   else
 958     {
 959       child_path = NULL;
 960       child_is_hidden = FALSE;
 961     }
 962
 963   g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0,
 964                  button_data->path, child_path, child_is_hidden);
 965 }
 966
 967 static GdkPixbuf *
 968 get_button_image (GtkPathBar *path_bar,
 969                   ButtonType  button_type)
 970 {
 971   GtkFileSystemVolume *volume;
 972
 973   switch (button_type)
 974     {
 975     case ROOT_BUTTON:
 976
 977       if (path_bar->root_icon != NULL)
 978         return path_bar->root_icon;
 979
 980       volume = gtk_file_system_get_volume_for_path (path_bar->file_system, path_bar->root_path);
 981       if (volume == NULL)
 982         return NULL;
 983
 984       path_bar->root_icon = gtk_file_system_volume_render_icon (path_bar->file_system,
 985                                                                 volume,
 986                                                                 GTK_WIDGET (path_bar),
 987                                                                 path_bar->icon_size,
 988                                                                 NULL);
 989       gtk_file_system_volume_free (path_bar->file_system, volume);
 990
 991       return path_bar->root_icon;
 992     case HOME_BUTTON:
 993       if (path_bar->home_icon != NULL)
 994         return path_bar->home_icon;
 995
 996       path_bar->home_icon = gtk_file_system_render_icon (path_bar->file_system,
 997                                                          path_bar->home_path,
 998                                                          GTK_WIDGET (path_bar),
 999                                                          path_bar->icon_size,
1000                                                          NULL);
1001       return path_bar->home_icon;
1002     case DESKTOP_BUTTON:
1003       if (path_bar->desktop_icon != NULL)
1004         return path_bar->desktop_icon;
1005
1006       path_bar->desktop_icon = gtk_file_system_render_icon (path_bar->file_system,
1007                                                             path_bar->desktop_path,
1008                                                             GTK_WIDGET (path_bar),
1009                                                             path_bar->icon_size,
1010                                                             NULL);
1011       return path_bar->desktop_icon;
1012     default:
1013       return NULL;
1014     }
1015
1016   return NULL;
1017 }
1018
1019 static void
1020 button_data_free (ButtonData *button_data)
1021 {
1022   gtk_file_path_free (button_data->path);
1023   g_free (button_data->dir_name);
1024   g_free (button_data);
1025 }
1026
1027 static const char *
1028 get_dir_name (ButtonData *button_data)
1029 {
1030   return button_data->dir_name;
1031 }
1032
1033 /* We always want to request the same size for the label, whether
1034  * or not the contents are bold
1035  */
1036 static void
1037 label_size_request_cb (GtkWidget      *widget,
1038                        GtkRequisition *requisition,
1039                        ButtonData     *button_data)
1040 {
1041   const gchar *dir_name = get_dir_name (button_data);
1042   PangoLayout *layout = gtk_widget_create_pango_layout (button_data->label, dir_name);
1043   gint bold_width, bold_height;
1044   gchar *markup;
1045
1046   pango_layout_get_pixel_size (layout, &requisition->width, &requisition->height);
1047
1048   markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1049   pango_layout_set_markup (layout, markup, -1);
1050   g_free (markup);
1051
1052   pango_layout_get_pixel_size (layout, &bold_width, &bold_height);
1053   requisition->width = MAX (requisition->width, bold_width);
1054   requisition->height = MAX (requisition->height, bold_height);
1055
1056   g_object_unref (layout);
1057 }
1058
1059 static void
1060 gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
1061                                        ButtonData *button_data,
1062                                        gboolean    current_dir)
1063 {
1064   const gchar *dir_name = get_dir_name (button_data);
1065
1066   if (button_data->label != NULL)
1067     {
1068       if (current_dir)
1069         {
1070           char *markup;
1071
1072           markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1073           gtk_label_set_markup (GTK_LABEL (button_data->label), markup);
1074           g_free (markup);
1075         }
1076       else
1077         {
1078           gtk_label_set_text (GTK_LABEL (button_data->label), dir_name);
1079         }
1080     }
1081
1082   if (button_data->image != NULL)
1083     {
1084       GdkPixbuf *pixbuf;
1085       pixbuf = get_button_image (path_bar, button_data->type);
1086       gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), pixbuf);
1087     }
1088
1089   if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir)
1090     {
1091       button_data->ignore_changes = TRUE;
1092       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir);
1093       button_data->ignore_changes = FALSE;
1094     }
1095 }
1096
1097 static ButtonType
1098 find_button_type (GtkPathBar  *path_bar,
1099                   GtkFilePath *path)
1100 {
1101   if (path_bar->root_path != NULL &&
1102       ! gtk_file_path_compare (path, path_bar->root_path))
1103     return ROOT_BUTTON;
1104   if (path_bar->home_path != NULL &&
1105       ! gtk_file_path_compare (path, path_bar->home_path))
1106     return HOME_BUTTON;
1107   if (path_bar->desktop_path != NULL &&
1108       ! gtk_file_path_compare (path, path_bar->desktop_path))
1109     return DESKTOP_BUTTON;
1110
1111  return NORMAL_BUTTON;
1112 }
1113
1114 static void
1115 button_drag_data_get_cb (GtkWidget          *widget,
1116                          GdkDragContext     *context,
1117                          GtkSelectionData   *selection_data,
1118                          guint               info,
1119                          guint               time_,
1120                          gpointer            data)
1121 {
1122   ButtonData *button_data;
1123   GtkPathBar *path_bar;
1124   char *uri;
1125   char *uri_list;
1126
1127   button_data = data;
1128   path_bar = GTK_PATH_BAR (widget->parent); /* the button's parent *is* the path bar */
1129
1130   uri = gtk_file_system_path_to_uri (path_bar->file_system, button_data->path);
1131   uri_list = g_strconcat (uri, "\r\n", NULL);
1132   g_free (uri);
1133
1134   gtk_selection_data_set (selection_data,
1135                           selection_data->target,
1136                           8,
1137                           uri_list,
1138                           strlen (uri_list));
1139   g_free (uri_list);
1140 }
1141
1142 static ButtonData *
1143 make_directory_button (GtkPathBar  *path_bar,
1144                        const char  *dir_name,
1145                        GtkFilePath *path,
1146                        gboolean     current_dir,
1147                        gboolean     file_is_hidden)
1148 {
1149   const GtkTargetEntry targets[] = {
1150     { "text/uri-list", 0, 0 }
1151   };
1152
1153   GtkWidget *child = NULL;
1154   GtkWidget *label_alignment = NULL;
1155   ButtonData *button_data;
1156
1157   file_is_hidden = !! file_is_hidden;
1158   /* Is it a special button? */
1159   button_data = g_new0 (ButtonData, 1);
1160
1161   button_data->type = find_button_type (path_bar, path);
1162   button_data->button = gtk_toggle_button_new ();
1163   gtk_button_set_focus_on_click (button_data->button, FALSE);
1164
1165   switch (button_data->type)
1166     {
1167     case ROOT_BUTTON:
1168       button_data->image = gtk_image_new ();
1169       child = button_data->image;
1170       button_data->label = NULL;
1171       break;
1172     case HOME_BUTTON:
1173     case DESKTOP_BUTTON:
1174       button_data->image = gtk_image_new ();
1175       button_data->label = gtk_label_new (NULL);
1176       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1177       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1178       child = gtk_hbox_new (FALSE, 2);
1179       gtk_box_pack_start (GTK_BOX (child), button_data->image, FALSE, FALSE, 0);
1180       gtk_box_pack_start (GTK_BOX (child), label_alignment, FALSE, FALSE, 0);
1181       break;
1182     case NORMAL_BUTTON:
1183     default:
1184       button_data->label = gtk_label_new (NULL);
1185       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1186       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1187       child = label_alignment;
1188       button_data->image = NULL;
1189     }
1190
1191   /* label_alignment is created because we can't override size-request
1192    * on label itself and still have the contents of the label centered
1193    * properly in the label's requisition
1194    */
1195   if (label_alignment)
1196     g_signal_connect (label_alignment, "size-request",
1197                       G_CALLBACK (label_size_request_cb), button_data);
1198
1199   button_data->dir_name = g_strdup (dir_name);
1200   button_data->path = gtk_file_path_new_dup (gtk_file_path_get_string (path));
1201   button_data->file_is_hidden = file_is_hidden;
1202
1203   gtk_container_add (GTK_CONTAINER (button_data->button), child);
1204   gtk_widget_show_all (button_data->button);
1205
1206   gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1207
1208   g_signal_connect (button_data->button, "clicked",
1209                     G_CALLBACK (button_clicked_cb),
1210                     button_data);
1211   g_object_weak_ref (G_OBJECT (button_data->button),
1212                      (GWeakNotify) button_data_free, button_data);
1213
1214   gtk_drag_source_set (button_data->button,
1215                        GDK_BUTTON1_MASK,
1216                        targets,
1217                        G_N_ELEMENTS (targets),
1218                        GDK_ACTION_COPY);
1219   g_signal_connect (button_data->button, "drag-data-get",
1220                     G_CALLBACK (button_drag_data_get_cb), button_data);
1221
1222   return button_data;
1223 }
1224
1225 static gboolean
1226 gtk_path_bar_check_parent_path (GtkPathBar         *path_bar,
1227                                 const GtkFilePath  *file_path,
1228                                 GtkFileSystem      *file_system)
1229 {
1230   GList *list;
1231   GList *current_path = NULL;
1232   gboolean need_new_fake_root = FALSE;
1233
1234   for (list = path_bar->button_list; list; list = list->next)
1235     {
1236       ButtonData *button_data;
1237
1238       button_data = list->data;
1239       if (! gtk_file_path_compare (file_path, button_data->path))
1240         {
1241           current_path = list;
1242           break;
1243         }
1244       if (list == path_bar->fake_root)
1245         need_new_fake_root = TRUE;
1246     }
1247
1248   if (current_path)
1249     {
1250       if (need_new_fake_root)
1251         {
1252           path_bar->fake_root = NULL;
1253           for (list = current_path; list; list = list->next)
1254             {
1255               ButtonData *button_data;
1256
1257               button_data = list->data;
1258               if (BUTTON_IS_FAKE_ROOT (button_data))
1259                 {
1260                   path_bar->fake_root = list;
1261                   break;
1262                 }
1263             }
1264         }
1265
1266       for (list = path_bar->button_list; list; list = list->next)
1267         {
1268           gtk_path_bar_update_button_appearance (path_bar,
1269                                                  BUTTON_DATA (list->data),
1270                                                  (list == current_path) ? TRUE : FALSE);
1271         }
1272
1273       if (!gtk_widget_get_child_visible (BUTTON_DATA (current_path->data)->button))
1274         {
1275           path_bar->first_scrolled_button = current_path;
1276           gtk_widget_queue_resize (GTK_WIDGET (path_bar));
1277         }
1278
1279       return TRUE;
1280     }
1281   return FALSE;
1282 }
1283
1284 gboolean
1285 _gtk_path_bar_set_path (GtkPathBar         *path_bar,
1286                         const GtkFilePath  *file_path,
1287                         const gboolean      keep_trail,
1288                         GError            **error)
1289 {
1290   GtkFilePath *path;
1291   gboolean first_directory = TRUE;
1292   gboolean result;
1293   GList *new_buttons = NULL;
1294   GList *fake_root = NULL;
1295
1296   g_return_val_if_fail (GTK_IS_PATH_BAR (path_bar), FALSE);
1297   g_return_val_if_fail (file_path != NULL, FALSE);
1298
1299   result = TRUE;
1300
1301   /* Check whether the new path is already present in the pathbar as buttons.
1302    * This could be a parent directory or a previous selected subdirectory.
1303    */
1304   if (keep_trail &&
1305       gtk_path_bar_check_parent_path (path_bar, file_path, path_bar->file_system))
1306     return TRUE;
1307
1308   path = gtk_file_path_copy (file_path);
1309
1310   gtk_widget_push_composite_child ();
1311
1312   while (path != NULL)
1313     {
1314       GtkFilePath *parent_path = NULL;
1315       ButtonData *button_data;
1316       const gchar *display_name;
1317       gboolean is_hidden;
1318       GtkFileFolder *file_folder;
1319       GtkFileInfo *file_info;
1320       gboolean valid;
1321
1322       valid = gtk_file_system_get_parent (path_bar->file_system,
1323                                           path,
1324                                           &parent_path,
1325                                           error);
1326       if (!valid)
1327         {
1328           result = FALSE;
1329           gtk_file_path_free (path);
1330           break;
1331         }
1332
1333       file_folder = gtk_file_system_get_folder (path_bar->file_system,
1334                                                 parent_path ? parent_path : path,
1335                                                 GTK_FILE_INFO_DISPLAY_NAME | GTK_FILE_INFO_IS_HIDDEN,
1336                                                 NULL);
1337       if (!file_folder)
1338         {
1339           result = FALSE;
1340           gtk_file_path_free (parent_path);
1341           gtk_file_path_free (path);
1342           break;
1343         }
1344
1345       file_info = gtk_file_folder_get_info (file_folder, parent_path ? path : NULL, error);
1346       g_object_unref (file_folder);
1347
1348       if (!file_info)
1349         {
1350           result = FALSE;
1351           gtk_file_path_free (parent_path);
1352           gtk_file_path_free (path);
1353           break;
1354         }
1355
1356       display_name = gtk_file_info_get_display_name (file_info);
1357       is_hidden = gtk_file_info_get_is_hidden (file_info);
1358
1359       button_data = make_directory_button (path_bar, display_name, path, first_directory, is_hidden);
1360       gtk_file_info_free (file_info);
1361       gtk_file_path_free (path);
1362
1363       new_buttons = g_list_prepend (new_buttons, button_data);
1364
1365       if (BUTTON_IS_FAKE_ROOT (button_data))
1366         fake_root = new_buttons;
1367
1368       path = parent_path;
1369       first_directory = FALSE;
1370     }
1371
1372   if (result)
1373     {
1374       GList *l;
1375
1376       gtk_path_bar_clear_buttons (path_bar);
1377       path_bar->button_list = g_list_reverse (new_buttons);
1378       path_bar->fake_root = fake_root;
1379
1380       for (l = path_bar->button_list; l; l = l->next)
1381         {
1382           GtkWidget *button = BUTTON_DATA (l->data)->button;
1383           gtk_container_add (GTK_CONTAINER (path_bar), button);
1384         }
1385     }
1386   else
1387     {
1388       GList *l;
1389
1390       for (l = new_buttons; l; l = l->next)
1391         {
1392           ButtonData *button_data;
1393
1394           button_data = BUTTON_DATA (l->data);
1395           gtk_widget_destroy (button_data->button);
1396         }
1397
1398       g_list_free (new_buttons);
1399     }
1400
1401   gtk_widget_pop_composite_child ();
1402
1403   return result;
1404 }
1405
1406 /* FIXME: This should be a construct-only property */
1407 void
1408 _gtk_path_bar_set_file_system (GtkPathBar    *path_bar,
1409                                GtkFileSystem *file_system)
1410 {
1411   const char *home;
1412   char *desktop;
1413
1414   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1415
1416   g_assert (path_bar->file_system == NULL);
1417
1418   path_bar->file_system = g_object_ref (file_system);
1419
1420   home = g_get_home_dir ();
1421   if (home != NULL)
1422     {
1423       path_bar->home_path = gtk_file_system_filename_to_path (path_bar->file_system, home);
1424       /* FIXME: Need file system backend specific way of getting the
1425        * Desktop path.
1426        */
1427       desktop = g_build_filename (home, "Desktop", NULL);
1428       path_bar->desktop_path = gtk_file_system_filename_to_path (path_bar->file_system, desktop);
1429       g_free (desktop);
1430     }
1431   else
1432     {
1433       path_bar->home_path = NULL;
1434       path_bar->desktop_path = NULL;
1435     }
1436   path_bar->root_path = gtk_file_system_filename_to_path (path_bar->file_system, "/");
1437 }
1438
1439 /**
1440  * _gtk_path_bar_up:
1441  * @path_bar: a #GtkPathBar
1442  *
1443  * If the selected button in the pathbar is not the furthest button "up" (in the
1444  * root direction), act as if the user clicked on the next button up.
1445  **/
1446 void
1447 _gtk_path_bar_up (GtkPathBar *path_bar)
1448 {
1449   GList *l;
1450
1451   for (l = path_bar->button_list; l; l = l->next)
1452     {
1453       GtkWidget *button = BUTTON_DATA (l->data)->button;
1454       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1455         {
1456           if (l->next)
1457             {
1458               GtkWidget *next_button = BUTTON_DATA (l->next->data)->button;
1459               button_clicked_cb (next_button, l->next->data);
1460             }
1461           break;
1462         }
1463     }
1464 }
1465
1466 /**
1467  * _gtk_path_bar_down:
1468  * @path_bar: a #GtkPathBar
1469  *
1470  * If the selected button in the pathbar is not the furthest button "down" (in the
1471  * leaf direction), act as if the user clicked on the next button down.
1472  **/
1473 void
1474 _gtk_path_bar_down (GtkPathBar *path_bar)
1475 {
1476   GList *l;
1477
1478   for (l = path_bar->button_list; l; l = l->next)
1479     {
1480       GtkWidget *button = BUTTON_DATA (l->data)->button;
1481       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1482         {
1483           if (l->prev)
1484             {
1485               GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button;
1486               button_clicked_cb (prev_button, l->prev->data);
1487             }
1488           break;
1489         }
1490     }
1491 }