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,
  79                gtk_path_bar,
  80                GTK_TYPE_CONTAINER);
  81
  82 static void gtk_path_bar_finalize                 (GObject          *object);
  83 static void gtk_path_bar_dispose                  (GObject          *object);
  84 static void gtk_path_bar_size_request             (GtkWidget        *widget,
  85                                                    GtkRequisition   *requisition);
  86 static void gtk_path_bar_unmap                    (GtkWidget          *widget);
  87 static void gtk_path_bar_size_allocate            (GtkWidget        *widget,
  88                                                    GtkAllocation    *allocation);
  89 static void gtk_path_bar_add                      (GtkContainer     *container,
  90                                                    GtkWidget        *widget);
  91 static void gtk_path_bar_remove                   (GtkContainer     *container,
  92                                                    GtkWidget        *widget);
  93 static void gtk_path_bar_forall                   (GtkContainer     *container,
  94                                                    gboolean          include_internals,
  95                                                    GtkCallback       callback,
  96                                                    gpointer          callback_data);
  97 static void gtk_path_bar_scroll_up                (GtkWidget        *button,
  98                                                    GtkPathBar       *path_bar);
  99 static void gtk_path_bar_scroll_down              (GtkWidget        *button,
 100                                                    GtkPathBar       *path_bar);
 101 static void gtk_path_bar_stop_scrolling           (GtkPathBar       *path_bar);
 102 static gboolean gtk_path_bar_slider_button_press  (GtkWidget        *widget,
 103                                                    GdkEventButton   *event,
 104                                                    GtkPathBar       *path_bar);
 105 static gboolean gtk_path_bar_slider_button_release(GtkWidget        *widget,
 106                                                    GdkEventButton   *event,
 107                                                    GtkPathBar       *path_bar);
 108 static void gtk_path_bar_grab_notify              (GtkWidget        *widget,
 109                                                    gboolean          was_grabbed);
 110 static void gtk_path_bar_state_changed            (GtkWidget        *widget,
 111                                                    GtkStateType      previous_state);
 112 static void gtk_path_bar_style_set                (GtkWidget        *widget,
 113                                                    GtkStyle         *previous_style);
 114 static void gtk_path_bar_screen_changed           (GtkWidget        *widget,
 115                                                    GdkScreen        *previous_screen);
 116 static void gtk_path_bar_check_icon_theme         (GtkPathBar       *path_bar);
 117 static void gtk_path_bar_update_button_appearance (GtkPathBar       *path_bar,
 118                                                    ButtonData       *button_data,
 119                                                    gboolean          current_dir);
 120
 121 static GtkWidget *
 122 get_slider_button (GtkPathBar  *path_bar,
 123                    GtkArrowType arrow_type)
 124 {
 125   GtkWidget *button;
 126
 127   gtk_widget_push_composite_child ();
 128
 129   button = gtk_button_new ();
 130   gtk_container_add (GTK_CONTAINER (button), gtk_arrow_new (arrow_type, GTK_SHADOW_OUT));
 131   gtk_container_add (GTK_CONTAINER (path_bar), button);
 132   gtk_widget_show_all (button);
 133
 134   gtk_widget_pop_composite_child ();
 135
 136   return button;
 137 }
 138
 139 static void
 140 gtk_path_bar_init (GtkPathBar *path_bar)
 141 {
 142   GTK_WIDGET_SET_FLAGS (path_bar, GTK_NO_WINDOW);
 143   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (path_bar), FALSE);
 144
 145   path_bar->spacing = 3;
 146   path_bar->up_slider_button = get_slider_button (path_bar, GTK_ARROW_LEFT);
 147   path_bar->down_slider_button = get_slider_button (path_bar, GTK_ARROW_RIGHT);
 148   path_bar->icon_size = FALLBACK_ICON_SIZE;
 149
 150   g_signal_connect (path_bar->up_slider_button, "clicked", G_CALLBACK (gtk_path_bar_scroll_up), path_bar);
 151   g_signal_connect (path_bar->down_slider_button, "clicked", G_CALLBACK (gtk_path_bar_scroll_down), path_bar);
 152
 153   g_signal_connect (path_bar->up_slider_button, "button_press_event", G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 154   g_signal_connect (path_bar->up_slider_button, "button_release_event", G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 155   g_signal_connect (path_bar->down_slider_button, "button_press_event", G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 156   g_signal_connect (path_bar->down_slider_button, "button_release_event", G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 157 }
 158
 159 static void
 160 gtk_path_bar_class_init (GtkPathBarClass *path_bar_class)
 161 {
 162   GObjectClass *gobject_class;
 163   GtkObjectClass *object_class;
 164   GtkWidgetClass *widget_class;
 165   GtkContainerClass *container_class;
 166
 167   gobject_class = (GObjectClass *) path_bar_class;
 168   object_class = (GtkObjectClass *) path_bar_class;
 169   widget_class = (GtkWidgetClass *) path_bar_class;
 170   container_class = (GtkContainerClass *) path_bar_class;
 171
 172   gobject_class->finalize = gtk_path_bar_finalize;
 173   gobject_class->dispose = gtk_path_bar_dispose;
 174
 175   widget_class->size_request = gtk_path_bar_size_request;
 176   widget_class->unmap = gtk_path_bar_unmap;
 177   widget_class->size_allocate = gtk_path_bar_size_allocate;
 178   widget_class->style_set = gtk_path_bar_style_set;
 179   widget_class->screen_changed = gtk_path_bar_screen_changed;
 180   widget_class->grab_notify = gtk_path_bar_grab_notify;
 181   widget_class->state_changed = gtk_path_bar_state_changed;
 182
 183   container_class->add = gtk_path_bar_add;
 184   container_class->forall = gtk_path_bar_forall;
 185   container_class->remove = gtk_path_bar_remove;
 186   /* FIXME: */
 187   /*  container_class->child_type = gtk_path_bar_child_type;*/
 188
 189   path_bar_signals [PATH_CLICKED] =
 190     g_signal_new ("path-clicked",
 191                   G_OBJECT_CLASS_TYPE (object_class),
 192                   G_SIGNAL_RUN_FIRST,
 193                   G_STRUCT_OFFSET (GtkPathBarClass, path_clicked),
 194                   NULL, NULL,
 195                   _gtk_marshal_VOID__POINTER_BOOLEAN,
 196                   G_TYPE_NONE, 2,
 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 (GTK_WIDGET_HAS_FOCUS (path_bar->up_slider_button))
 736         gtk_path_bar_scroll_up (path_bar->up_slider_button, path_bar);
 737       else if (GTK_WIDGET_HAS_FOCUS (path_bar->down_slider_button))
 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 (!GTK_WIDGET_HAS_FOCUS (widget))
 776     gtk_widget_grab_focus (widget);
 777
 778   if (event->type != GDK_BUTTON_PRESS || event->button != 1)
 779     return FALSE;
 780
 781   path_bar->ignore_click = FALSE;
 782
 783   if (widget == path_bar->up_slider_button)
 784     gtk_path_bar_scroll_up (path_bar->up_slider_button, path_bar);
 785   else if (widget == path_bar->down_slider_button)
 786      gtk_path_bar_scroll_down (path_bar->down_slider_button, path_bar);
 787
 788   if (!path_bar->timer)
 789     {
 790       path_bar->need_timer = TRUE;
 791       path_bar->timer = g_timeout_add (INITIAL_SCROLL_TIMEOUT,
 792                                        (GSourceFunc)gtk_path_bar_scroll_timeout,
 793                                        path_bar);
 794     }
 795
 796   return FALSE;
 797 }
 798
 799 static gboolean
 800 gtk_path_bar_slider_button_release (GtkWidget      *widget,
 801                                     GdkEventButton *event,
 802                                     GtkPathBar     *path_bar)
 803 {
 804   if (event->type != GDK_BUTTON_RELEASE)
 805     return FALSE;
 806
 807   path_bar->ignore_click = TRUE;
 808   gtk_path_bar_stop_scrolling (path_bar);
 809
 810   return FALSE;
 811 }
 812
 813 static void
 814 gtk_path_bar_grab_notify (GtkWidget *widget,
 815                           gboolean   was_grabbed)
 816 {
 817   if (!was_grabbed)
 818     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 819 }
 820
 821 static void
 822 gtk_path_bar_state_changed (GtkWidget    *widget,
 823                             GtkStateType  previous_state)
 824 {
 825   if (!GTK_WIDGET_IS_SENSITIVE (widget))
 826     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 827 }
 828
 829
 830 /* Changes the icons wherever it is needed */
 831 static void
 832 reload_icons (GtkPathBar *path_bar)
 833 {
 834   GList *list;
 835
 836   if (path_bar->root_icon)
 837     {
 838       g_object_unref (path_bar->root_icon);
 839       path_bar->root_icon = NULL;
 840     }
 841   if (path_bar->home_icon)
 842     {
 843       g_object_unref (path_bar->home_icon);
 844       path_bar->home_icon = NULL;
 845     }
 846   if (path_bar->desktop_icon)
 847     {
 848       g_object_unref (path_bar->desktop_icon);
 849       path_bar->desktop_icon = NULL;
 850     }
 851
 852   for (list = path_bar->button_list; list; list = list->next)
 853     {
 854       ButtonData *button_data;
 855       gboolean current_dir;
 856
 857       button_data = BUTTON_DATA (list->data);
 858       if (button_data->type != NORMAL_BUTTON)
 859         {
 860           current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button));
 861           gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
 862         }
 863     }
 864
 865 }
 866
 867 static void
 868 change_icon_theme (GtkPathBar *path_bar)
 869 {
 870   GtkSettings *settings;
 871   gint width, height;
 872
 873   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
 874
 875   if (gtk_icon_size_lookup_for_settings (settings, GTK_ICON_SIZE_MENU, &width, &height))
 876     path_bar->icon_size = MAX (width, height);
 877   else
 878     path_bar->icon_size = FALLBACK_ICON_SIZE;
 879
 880   reload_icons (path_bar);
 881 }
 882 /* Callback used when a GtkSettings value changes */
 883 static void
 884 settings_notify_cb (GObject    *object,
 885                     GParamSpec *pspec,
 886                     GtkPathBar *path_bar)
 887 {
 888   const char *name;
 889
 890   name = g_param_spec_get_name (pspec);
 891
 892   if (! strcmp (name, "gtk-icon-theme-name") ||
 893       ! strcmp (name, "gtk-icon-sizes"))
 894     change_icon_theme (path_bar);
 895 }
 896
 897 static void
 898 gtk_path_bar_check_icon_theme (GtkPathBar *path_bar)
 899 {
 900   GtkSettings *settings;
 901
 902   if (path_bar->settings_signal_id)
 903     return;
 904
 905   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
 906   path_bar->settings_signal_id = g_signal_connect (settings, "notify", G_CALLBACK (settings_notify_cb), path_bar);
 907
 908   change_icon_theme (path_bar);
 909 }
 910
 911 /* Public functions and their helpers */
 912 static void
 913 gtk_path_bar_clear_buttons (GtkPathBar *path_bar)
 914 {
 915   while (path_bar->button_list != NULL)
 916     {
 917       gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (path_bar->button_list->data)->button);
 918     }
 919   path_bar->first_scrolled_button = NULL;
 920   path_bar->fake_root = NULL;
 921 }
 922
 923 static void
 924 button_clicked_cb (GtkWidget *button,
 925                    gpointer   data)
 926 {
 927   ButtonData *button_data;
 928   GtkPathBar *path_bar;
 929   GList *button_list;
 930   gboolean child_is_hidden;
 931
 932   button_data = BUTTON_DATA (data);
 933   if (button_data->ignore_changes)
 934     return;
 935
 936   path_bar = GTK_PATH_BAR (button->parent);
 937
 938   button_list = g_list_find (path_bar->button_list, button_data);
 939   g_assert (button_list != NULL);
 940
 941   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
 942
 943   if (button_list->prev)
 944     {
 945       ButtonData *child_data;
 946
 947       child_data = BUTTON_DATA (button_list->prev->data);
 948       child_is_hidden = child_data->file_is_hidden;
 949     }
 950   else
 951     child_is_hidden = FALSE;
 952
 953   g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0, button_data->path, child_is_hidden);
 954 }
 955
 956 static GdkPixbuf *
 957 get_button_image (GtkPathBar *path_bar,
 958                   ButtonType  button_type)
 959 {
 960   GtkFileSystemVolume *volume;
 961
 962   switch (button_type)
 963     {
 964     case ROOT_BUTTON:
 965
 966       if (path_bar->root_icon != NULL)
 967         return path_bar->root_icon;
 968
 969       volume = gtk_file_system_get_volume_for_path (path_bar->file_system, path_bar->root_path);
 970       if (volume == NULL)
 971         return NULL;
 972
 973       path_bar->root_icon = gtk_file_system_volume_render_icon (path_bar->file_system,
 974                                                                 volume,
 975                                                                 GTK_WIDGET (path_bar),
 976                                                                 path_bar->icon_size,
 977                                                                 NULL);
 978       gtk_file_system_volume_free (path_bar->file_system, volume);
 979
 980       return path_bar->root_icon;
 981     case HOME_BUTTON:
 982       if (path_bar->home_icon != NULL)
 983         return path_bar->home_icon;
 984
 985       path_bar->home_icon = gtk_file_system_render_icon (path_bar->file_system,
 986                                                          path_bar->home_path,
 987                                                          GTK_WIDGET (path_bar),
 988                                                          path_bar->icon_size,
 989                                                          NULL);
 990       return path_bar->home_icon;
 991     case DESKTOP_BUTTON:
 992       if (path_bar->desktop_icon != NULL)
 993         return path_bar->desktop_icon;
 994
 995       path_bar->desktop_icon = gtk_file_system_render_icon (path_bar->file_system,
 996                                                             path_bar->desktop_path,
 997                                                             GTK_WIDGET (path_bar),
 998                                                             path_bar->icon_size,
 999                                                             NULL);
1000       return path_bar->desktop_icon;
1001     default:
1002       return NULL;
1003     }
1004
1005   return NULL;
1006 }
1007
1008 static void
1009 button_data_free (ButtonData *button_data)
1010 {
1011   gtk_file_path_free (button_data->path);
1012   g_free (button_data->dir_name);
1013   g_free (button_data);
1014 }
1015
1016 static const char *
1017 get_dir_name (ButtonData *button_data)
1018 {
1019   if (button_data->type == HOME_BUTTON)
1020     return _("Home");
1021   else if (button_data->type == DESKTOP_BUTTON)
1022     return _("Desktop");
1023   else
1024     return button_data->dir_name;
1025
1026 }
1027
1028 /* We always want to request the same size for the label, whether
1029  * or not the contents are bold
1030  */
1031 static void
1032 label_size_request_cb (GtkWidget      *widget,
1033                        GtkRequisition *requisition,
1034                        ButtonData     *button_data)
1035 {
1036   const gchar *dir_name = get_dir_name (button_data);
1037   PangoLayout *layout = gtk_widget_create_pango_layout (button_data->label, dir_name);
1038   gint bold_width, bold_height;
1039   gchar *markup;
1040
1041   pango_layout_get_pixel_size (layout, &requisition->width, &requisition->height);
1042
1043   markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1044   pango_layout_set_markup (layout, markup, -1);
1045   g_free (markup);
1046
1047   pango_layout_get_pixel_size (layout, &bold_width, &bold_height);
1048   requisition->width = MAX (requisition->width, bold_width);
1049   requisition->height = MAX (requisition->height, bold_height);
1050
1051   g_object_unref (layout);
1052 }
1053
1054 static void
1055 gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
1056                                        ButtonData *button_data,
1057                                        gboolean    current_dir)
1058 {
1059   const gchar *dir_name = get_dir_name (button_data);
1060
1061   if (button_data->label != NULL)
1062     {
1063       if (current_dir)
1064         {
1065           char *markup;
1066
1067           markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1068           gtk_label_set_markup (GTK_LABEL (button_data->label), markup);
1069           g_free (markup);
1070         }
1071       else
1072         {
1073           gtk_label_set_text (GTK_LABEL (button_data->label), dir_name);
1074         }
1075     }
1076
1077   if (button_data->image != NULL)
1078     {
1079       GdkPixbuf *pixbuf;
1080       pixbuf = get_button_image (path_bar, button_data->type);
1081       gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), pixbuf);
1082     }
1083
1084   if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir)
1085     {
1086       button_data->ignore_changes = TRUE;
1087       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir);
1088       button_data->ignore_changes = FALSE;
1089     }
1090 }
1091
1092 static ButtonType
1093 find_button_type (GtkPathBar  *path_bar,
1094                   GtkFilePath *path)
1095 {
1096   if (path_bar->root_path != NULL &&
1097       ! gtk_file_path_compare (path, path_bar->root_path))
1098     return ROOT_BUTTON;
1099   if (path_bar->home_path != NULL &&
1100       ! gtk_file_path_compare (path, path_bar->home_path))
1101     return HOME_BUTTON;
1102   if (path_bar->desktop_path != NULL &&
1103       ! gtk_file_path_compare (path, path_bar->desktop_path))
1104     return DESKTOP_BUTTON;
1105
1106  return NORMAL_BUTTON;
1107 }
1108
1109 static void
1110 button_drag_data_get_cb (GtkWidget          *widget,
1111                          GdkDragContext     *context,
1112                          GtkSelectionData   *selection_data,
1113                          guint               info,
1114                          guint               time_,
1115                          gpointer            data)
1116 {
1117   ButtonData *button_data;
1118   GtkPathBar *path_bar;
1119   char *uri;
1120   char *uri_list;
1121
1122   button_data = data;
1123   path_bar = GTK_PATH_BAR (widget->parent); /* the button's parent *is* the path bar */
1124
1125   uri = gtk_file_system_path_to_uri (path_bar->file_system, button_data->path);
1126   uri_list = g_strconcat (uri, "\r\n", NULL);
1127   g_free (uri);
1128
1129   gtk_selection_data_set (selection_data,
1130                           selection_data->target,
1131                           8,
1132                           uri_list,
1133                           strlen (uri_list));
1134   g_free (uri_list);
1135 }
1136
1137 static ButtonData *
1138 make_directory_button (GtkPathBar  *path_bar,
1139                        const char  *dir_name,
1140                        GtkFilePath *path,
1141                        gboolean     current_dir,
1142                        gboolean     file_is_hidden)
1143 {
1144   const GtkTargetEntry targets[] = {
1145     { "text/uri-list", 0, 0 }
1146   };
1147
1148   GtkWidget *child = NULL;
1149   GtkWidget *label_alignment = NULL;
1150   ButtonData *button_data;
1151
1152   file_is_hidden = !! file_is_hidden;
1153   /* Is it a special button? */
1154   button_data = g_new0 (ButtonData, 1);
1155
1156   button_data->type = find_button_type (path_bar, path);
1157   button_data->button = gtk_toggle_button_new ();
1158
1159   switch (button_data->type)
1160     {
1161     case ROOT_BUTTON:
1162       button_data->image = gtk_image_new ();
1163       child = button_data->image;
1164       button_data->label = NULL;
1165       break;
1166     case HOME_BUTTON:
1167     case DESKTOP_BUTTON:
1168       button_data->image = gtk_image_new ();
1169       button_data->label = gtk_label_new (NULL);
1170       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1171       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1172       child = gtk_hbox_new (FALSE, 2);
1173       gtk_box_pack_start (GTK_BOX (child), button_data->image, FALSE, FALSE, 0);
1174       gtk_box_pack_start (GTK_BOX (child), label_alignment, FALSE, FALSE, 0);
1175       break;
1176     case NORMAL_BUTTON:
1177     default:
1178       button_data->label = gtk_label_new (NULL);
1179       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1180       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1181       child = label_alignment;
1182       button_data->image = NULL;
1183     }
1184
1185   /* label_alignment is created because we can't override size-request
1186    * on label itself and still have the contents of the label centered
1187    * properly in the label's requisition
1188    */
1189   if (label_alignment)
1190     g_signal_connect (label_alignment, "size-request",
1191                       G_CALLBACK (label_size_request_cb), button_data);
1192
1193   button_data->dir_name = g_strdup (dir_name);
1194   button_data->path = gtk_file_path_new_dup (gtk_file_path_get_string (path));
1195   button_data->file_is_hidden = file_is_hidden;
1196
1197   gtk_container_add (GTK_CONTAINER (button_data->button), child);
1198   gtk_widget_show_all (button_data->button);
1199
1200   gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1201
1202   g_signal_connect (button_data->button, "clicked",
1203                     G_CALLBACK (button_clicked_cb),
1204                     button_data);
1205   g_object_weak_ref (G_OBJECT (button_data->button),
1206                      (GWeakNotify) button_data_free, button_data);
1207
1208   gtk_drag_source_set (button_data->button,
1209                        GDK_BUTTON1_MASK,
1210                        targets,
1211                        G_N_ELEMENTS (targets),
1212                        GDK_ACTION_COPY);
1213   g_signal_connect (button_data->button, "drag-data-get",
1214                     G_CALLBACK (button_drag_data_get_cb), button_data);
1215
1216   return button_data;
1217 }
1218
1219 static gboolean
1220 gtk_path_bar_check_parent_path (GtkPathBar         *path_bar,
1221                                 const GtkFilePath  *file_path,
1222                                 GtkFileSystem      *file_system)
1223 {
1224   GList *list;
1225   GList *current_path = NULL;
1226   gboolean need_new_fake_root = FALSE;
1227
1228   for (list = path_bar->button_list; list; list = list->next)
1229     {
1230       ButtonData *button_data;
1231
1232       button_data = list->data;
1233       if (! gtk_file_path_compare (file_path, button_data->path))
1234         {
1235           current_path = list;
1236           break;
1237         }
1238       if (list == path_bar->fake_root)
1239         need_new_fake_root = TRUE;
1240     }
1241
1242   if (current_path)
1243     {
1244       if (need_new_fake_root)
1245         {
1246           path_bar->fake_root = NULL;
1247           for (list = current_path; list; list = list->next)
1248             {
1249               ButtonData *button_data;
1250
1251               button_data = list->data;
1252               if (BUTTON_IS_FAKE_ROOT (button_data))
1253                 {
1254                   path_bar->fake_root = list;
1255                   break;
1256                 }
1257             }
1258         }
1259
1260       for (list = path_bar->button_list; list; list = list->next)
1261         {
1262           gtk_path_bar_update_button_appearance (path_bar,
1263                                                  BUTTON_DATA (list->data),
1264                                                  (list == current_path) ? TRUE : FALSE);
1265         }
1266
1267       if (!gtk_widget_get_child_visible (BUTTON_DATA (current_path->data)->button))
1268         {
1269           path_bar->first_scrolled_button = current_path;
1270           gtk_widget_queue_resize (GTK_WIDGET (path_bar));
1271         }
1272
1273       return TRUE;
1274     }
1275   return FALSE;
1276 }
1277
1278 gboolean
1279 _gtk_path_bar_set_path (GtkPathBar         *path_bar,
1280                         const GtkFilePath  *file_path,
1281                         GError            **error)
1282 {
1283   GtkFilePath *path;
1284   gboolean first_directory = TRUE;
1285   gboolean result;
1286   GList *new_buttons = NULL;
1287   GList *fake_root = NULL;
1288
1289   g_return_val_if_fail (GTK_IS_PATH_BAR (path_bar), FALSE);
1290   g_return_val_if_fail (file_path != NULL, FALSE);
1291
1292   result = TRUE;
1293
1294   /* Check whether the new path is already present in the pathbar as buttons.
1295    * This could be a parent directory or a previous selected subdirectory.
1296    */
1297   if (gtk_path_bar_check_parent_path (path_bar, file_path, path_bar->file_system))
1298     return TRUE;
1299
1300   path = gtk_file_path_copy (file_path);
1301
1302   gtk_widget_push_composite_child ();
1303
1304   while (path != NULL)
1305     {
1306       GtkFilePath *parent_path = NULL;
1307       ButtonData *button_data;
1308       const gchar *display_name;
1309       gboolean is_hidden;
1310       GtkFileFolder *file_folder;
1311       GtkFileInfo *file_info;
1312       gboolean valid;
1313
1314       valid = gtk_file_system_get_parent (path_bar->file_system,
1315                                           path,
1316                                           &parent_path,
1317                                           error);
1318       if (!valid)
1319         {
1320           result = FALSE;
1321           gtk_file_path_free (path);
1322           break;
1323         }
1324
1325       file_folder = gtk_file_system_get_folder (path_bar->file_system,
1326                                                 parent_path ? parent_path : path,
1327                                                 GTK_FILE_INFO_DISPLAY_NAME | GTK_FILE_INFO_IS_HIDDEN,
1328                                                 NULL);
1329       if (!file_folder)
1330         {
1331           result = FALSE;
1332           gtk_file_path_free (parent_path);
1333           gtk_file_path_free (path);
1334           break;
1335         }
1336
1337       file_info = gtk_file_folder_get_info (file_folder, parent_path ? path : NULL, error);
1338       g_object_unref (file_folder);
1339
1340       if (!file_info)
1341         {
1342           result = FALSE;
1343           gtk_file_path_free (parent_path);
1344           gtk_file_path_free (path);
1345           break;
1346         }
1347
1348       display_name = gtk_file_info_get_display_name (file_info);
1349       is_hidden = gtk_file_info_get_is_hidden (file_info);
1350
1351       button_data = make_directory_button (path_bar, display_name, path, first_directory, is_hidden);
1352       gtk_file_info_free (file_info);
1353       gtk_file_path_free (path);
1354
1355       new_buttons = g_list_prepend (new_buttons, button_data);
1356
1357       if (BUTTON_IS_FAKE_ROOT (button_data))
1358         fake_root = new_buttons;
1359
1360       path = parent_path;
1361       first_directory = FALSE;
1362     }
1363
1364   if (result)
1365     {
1366       GList *l;
1367
1368       gtk_path_bar_clear_buttons (path_bar);
1369       path_bar->button_list = g_list_reverse (new_buttons);
1370       path_bar->fake_root = fake_root;
1371
1372       for (l = path_bar->button_list; l; l = l->next)
1373         {
1374           GtkWidget *button = BUTTON_DATA (l->data)->button;
1375           gtk_container_add (GTK_CONTAINER (path_bar), button);
1376         }
1377     }
1378   else
1379     {
1380       GList *l;
1381
1382       for (l = new_buttons; l; l = l->next)
1383         {
1384           ButtonData *button_data;
1385
1386           button_data = BUTTON_DATA (l->data);
1387           gtk_widget_destroy (button_data->button);
1388         }
1389
1390       g_list_free (new_buttons);
1391     }
1392
1393   gtk_widget_pop_composite_child ();
1394
1395   return result;
1396 }
1397
1398
1399 /* FIXME: This should be a construct-only property */
1400 void
1401 _gtk_path_bar_set_file_system (GtkPathBar    *path_bar,
1402                                GtkFileSystem *file_system)
1403 {
1404   const char *home;
1405   char *desktop;
1406
1407   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1408
1409   g_assert (path_bar->file_system == NULL);
1410
1411   path_bar->file_system = g_object_ref (file_system);
1412
1413   home = g_get_home_dir ();
1414   if (home != NULL)
1415     {
1416       path_bar->home_path = gtk_file_system_filename_to_path (path_bar->file_system, home);
1417       /* FIXME: Need file system backend specific way of getting the
1418        * Desktop path.
1419        */
1420       desktop = g_build_filename (home, "Desktop", NULL);
1421       path_bar->desktop_path = gtk_file_system_filename_to_path (path_bar->file_system, desktop);
1422       g_free (desktop);
1423     }
1424   else
1425     {
1426       path_bar->home_path = NULL;
1427       path_bar->desktop_path = NULL;
1428     }
1429   path_bar->root_path = gtk_file_system_filename_to_path (path_bar->file_system, "/");
1430 }
1431
1432 /**
1433  * _gtk_path_bar_up:
1434  * @path_bar: a #GtkPathBar
1435  *
1436  * If the selected button in the pathbar is not the furthest button "up" (in the
1437  * root direction), act as if the user clicked on the next button up.
1438  **/
1439 void
1440 _gtk_path_bar_up (GtkPathBar *path_bar)
1441 {
1442   GList *l;
1443
1444   for (l = path_bar->button_list; l; l = l->next)
1445     {
1446       GtkWidget *button = BUTTON_DATA (l->data)->button;
1447       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1448         {
1449           if (l->next)
1450             {
1451               GtkWidget *next_button = BUTTON_DATA (l->next->data)->button;
1452               button_clicked_cb (next_button, l->next->data);
1453             }
1454           break;
1455         }
1456     }
1457 }
1458
1459 /**
1460  * _gtk_path_bar_down:
1461  * @path_bar: a #GtkPathBar
1462  *
1463  * If the selected button in the pathbar is not the furthest button "down" (in the
1464  * leaf direction), act as if the user clicked on the next button down.
1465  **/
1466 void
1467 _gtk_path_bar_down (GtkPathBar *path_bar)
1468 {
1469   GList *l;
1470
1471   for (l = path_bar->button_list; l; l = l->next)
1472     {
1473       GtkWidget *button = BUTTON_DATA (l->data)->button;
1474       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1475         {
1476           if (l->prev)
1477             {
1478               GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button;
1479               button_clicked_cb (prev_button, l->prev->data);
1480             }
1481           break;
1482         }
1483     }
1484 }