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