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