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

   1 /* -*- Mode: C; c-file-style: "gnu"; tab-width: 8 -*- */
   2 /* gtkpathbar.c
   3  * Copyright (C) 2004  Red Hat, Inc.,  Jonathan Blandford <jrb@gnome.org>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include "gtkpathbar.h"
  24
  25 #include <string.h>
  26
  27 #include "gtktogglebutton.h"
  28 #include "gtkarrow.h"
  29 #include "gtkdnd.h"
  30 #include "gtkimage.h"
  31 #include "gtkintl.h"
  32 #include "gtkicontheme.h"
  33 #include "gtkiconfactory.h"
  34 #include "gtklabel.h"
  35 #include "gtkhbox.h"
  36 #include "gtkmain.h"
  37 #include "gtkmarshalers.h"
  38
  39
  40 enum {
  41   PATH_CLICKED,
  42   LAST_SIGNAL
  43 };
  44
  45 typedef enum {
  46   NORMAL_BUTTON,
  47   ROOT_BUTTON,
  48   HOME_BUTTON,
  49   DESKTOP_BUTTON
  50 } ButtonType;
  51
  52 #define BUTTON_DATA(x) ((ButtonData *)(x))
  53
  54 #define SCROLL_DELAY_FACTOR 5
  55
  56 static guint path_bar_signals [LAST_SIGNAL] = { 0 };
  57
  58 /* Icon size for if we can't get it from the theme */
  59 #define FALLBACK_ICON_SIZE 16
  60
  61 typedef struct _ButtonData ButtonData;
  62
  63 struct _ButtonData
  64 {
  65   GtkWidget *button;
  66   ButtonType type;
  67   char *dir_name;
  68   GFile *file;
  69   GtkWidget *image;
  70   GtkWidget *label;
  71   GCancellable *cancellable;
  72   guint ignore_changes : 1;
  73   guint file_is_hidden : 1;
  74 };
  75 /* This macro is used to check if a button can be used as a fake root.
  76  * All buttons in front of a fake root are automatically hidden when in a
  77  * directory below a fake root and replaced with the "<" arrow button.
  78  */
  79 #define BUTTON_IS_FAKE_ROOT(button) ((button)->type == HOME_BUTTON)
  80
  81 G_DEFINE_TYPE (GtkPathBar, gtk_path_bar, GTK_TYPE_CONTAINER)
  82
  83 static void gtk_path_bar_finalize                 (GObject          *object);
  84 static void gtk_path_bar_dispose                  (GObject          *object);
  85 static void gtk_path_bar_realize                  (GtkWidget        *widget);
  86 static void gtk_path_bar_unrealize                (GtkWidget        *widget);
  87 static void gtk_path_bar_get_preferred_width      (GtkWidget        *widget,
  88                                                    gint             *minimum,
  89                                                    gint             *natural);
  90 static void gtk_path_bar_get_preferred_height     (GtkWidget        *widget,
  91                                                    gint             *minimum,
  92                                                    gint             *natural);
  93 static void gtk_path_bar_map                      (GtkWidget        *widget);
  94 static void gtk_path_bar_unmap                    (GtkWidget        *widget);
  95 static void gtk_path_bar_size_allocate            (GtkWidget        *widget,
  96                                                    GtkAllocation    *allocation);
  97 static void gtk_path_bar_add                      (GtkContainer     *container,
  98                                                    GtkWidget        *widget);
  99 static void gtk_path_bar_remove                   (GtkContainer     *container,
 100                                                    GtkWidget        *widget);
 101 static void gtk_path_bar_forall                   (GtkContainer     *container,
 102                                                    gboolean          include_internals,
 103                                                    GtkCallback       callback,
 104                                                    gpointer          callback_data);
 105 static gboolean gtk_path_bar_scroll               (GtkWidget        *widget,
 106                                                    GdkEventScroll   *event);
 107 static void gtk_path_bar_scroll_up                (GtkPathBar       *path_bar);
 108 static void gtk_path_bar_scroll_down              (GtkPathBar       *path_bar);
 109 static void gtk_path_bar_stop_scrolling           (GtkPathBar       *path_bar);
 110 static gboolean gtk_path_bar_slider_up_defocus    (GtkWidget        *widget,
 111                                                    GdkEventButton   *event,
 112                                                    GtkPathBar       *path_bar);
 113 static gboolean gtk_path_bar_slider_down_defocus  (GtkWidget        *widget,
 114                                                    GdkEventButton   *event,
 115                                                    GtkPathBar       *path_bar);
 116 static gboolean gtk_path_bar_slider_button_press  (GtkWidget        *widget,
 117                                                    GdkEventButton   *event,
 118                                                    GtkPathBar       *path_bar);
 119 static gboolean gtk_path_bar_slider_button_release(GtkWidget        *widget,
 120                                                    GdkEventButton   *event,
 121                                                    GtkPathBar       *path_bar);
 122 static void gtk_path_bar_grab_notify              (GtkWidget        *widget,
 123                                                    gboolean          was_grabbed);
 124 static void gtk_path_bar_state_changed            (GtkWidget        *widget,
 125                                                    GtkStateType      previous_state);
 126 static void gtk_path_bar_style_updated            (GtkWidget        *widget);
 127 static void gtk_path_bar_screen_changed           (GtkWidget        *widget,
 128                                                    GdkScreen        *previous_screen);
 129 static void gtk_path_bar_check_icon_theme         (GtkPathBar       *path_bar);
 130 static void gtk_path_bar_update_button_appearance (GtkPathBar       *path_bar,
 131                                                    ButtonData       *button_data,
 132                                                    gboolean          current_dir);
 133
 134 static void
 135 on_slider_unmap (GtkWidget  *widget,
 136                  GtkPathBar *path_bar)
 137 {
 138   if (path_bar->timer &&
 139       ((widget == path_bar->up_slider_button && path_bar->scrolling_up) ||
 140        (widget == path_bar->down_slider_button && path_bar->scrolling_down)))
 141     gtk_path_bar_stop_scrolling (path_bar);
 142 }
 143
 144 static GtkWidget *
 145 get_slider_button (GtkPathBar  *path_bar,
 146                    GtkArrowType arrow_type)
 147 {
 148   GtkWidget *button;
 149   AtkObject *atk_obj;
 150
 151   gtk_widget_push_composite_child ();
 152
 153   button = gtk_button_new ();
 154   atk_obj = gtk_widget_get_accessible (button);
 155   if (arrow_type == GTK_ARROW_LEFT)
 156     atk_object_set_name (atk_obj, _("Up Path"));
 157   else
 158     atk_object_set_name (atk_obj, _("Down Path"));
 159
 160   gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE);
 161   gtk_container_add (GTK_CONTAINER (button),
 162                      gtk_arrow_new (arrow_type, GTK_SHADOW_OUT));
 163   gtk_container_add (GTK_CONTAINER (path_bar), button);
 164   gtk_widget_show_all (button);
 165
 166   g_signal_connect (G_OBJECT (button), "unmap",
 167                     G_CALLBACK (on_slider_unmap), path_bar);
 168
 169   gtk_widget_pop_composite_child ();
 170
 171   return button;
 172 }
 173
 174 static void
 175 gtk_path_bar_init (GtkPathBar *path_bar)
 176 {
 177   gtk_widget_set_has_window (GTK_WIDGET (path_bar), FALSE);
 178   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (path_bar), FALSE);
 179
 180   path_bar->get_info_cancellable = NULL;
 181
 182   path_bar->spacing = 0;
 183   path_bar->up_slider_button = get_slider_button (path_bar, GTK_ARROW_LEFT);
 184   path_bar->down_slider_button = get_slider_button (path_bar, GTK_ARROW_RIGHT);
 185   path_bar->icon_size = FALLBACK_ICON_SIZE;
 186
 187   g_signal_connect_swapped (path_bar->up_slider_button, "clicked",
 188                             G_CALLBACK (gtk_path_bar_scroll_up), path_bar);
 189   g_signal_connect_swapped (path_bar->down_slider_button, "clicked",
 190                             G_CALLBACK (gtk_path_bar_scroll_down), path_bar);
 191
 192   g_signal_connect (path_bar->up_slider_button, "focus-out-event",
 193                     G_CALLBACK (gtk_path_bar_slider_up_defocus), path_bar);
 194   g_signal_connect (path_bar->down_slider_button, "focus-out-event",
 195                     G_CALLBACK (gtk_path_bar_slider_down_defocus), path_bar);
 196
 197   g_signal_connect (path_bar->up_slider_button, "button-press-event",
 198                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 199   g_signal_connect (path_bar->up_slider_button, "button-release-event",
 200                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 201   g_signal_connect (path_bar->down_slider_button, "button-press-event",
 202                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 203   g_signal_connect (path_bar->down_slider_button, "button-release-event",
 204                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 205 }
 206
 207 static void
 208 gtk_path_bar_class_init (GtkPathBarClass *path_bar_class)
 209 {
 210   GObjectClass *gobject_class;
 211   GtkWidgetClass *widget_class;
 212   GtkContainerClass *container_class;
 213
 214   gobject_class = (GObjectClass *) path_bar_class;
 215   widget_class = (GtkWidgetClass *) path_bar_class;
 216   container_class = (GtkContainerClass *) path_bar_class;
 217
 218   gobject_class->finalize = gtk_path_bar_finalize;
 219   gobject_class->dispose = gtk_path_bar_dispose;
 220
 221   widget_class->get_preferred_width = gtk_path_bar_get_preferred_width;
 222   widget_class->get_preferred_height = gtk_path_bar_get_preferred_height;
 223   widget_class->realize = gtk_path_bar_realize;
 224   widget_class->unrealize = gtk_path_bar_unrealize;
 225   widget_class->map = gtk_path_bar_map;
 226   widget_class->unmap = gtk_path_bar_unmap;
 227   widget_class->size_allocate = gtk_path_bar_size_allocate;
 228   widget_class->style_updated = gtk_path_bar_style_updated;
 229   widget_class->screen_changed = gtk_path_bar_screen_changed;
 230   widget_class->grab_notify = gtk_path_bar_grab_notify;
 231   widget_class->state_changed = gtk_path_bar_state_changed;
 232   widget_class->scroll_event = gtk_path_bar_scroll;
 233
 234   container_class->add = gtk_path_bar_add;
 235   container_class->forall = gtk_path_bar_forall;
 236   container_class->remove = gtk_path_bar_remove;
 237   gtk_container_class_handle_border_width (container_class);
 238   /* FIXME: */
 239   /*  container_class->child_type = gtk_path_bar_child_type;*/
 240
 241   path_bar_signals [PATH_CLICKED] =
 242     g_signal_new (I_("path-clicked"),
 243                   G_OBJECT_CLASS_TYPE (gobject_class),
 244                   G_SIGNAL_RUN_FIRST,
 245                   G_STRUCT_OFFSET (GtkPathBarClass, path_clicked),
 246                   NULL, NULL,
 247                   _gtk_marshal_VOID__POINTER_POINTER_BOOLEAN,
 248                   G_TYPE_NONE, 3,
 249                   G_TYPE_POINTER,
 250                   G_TYPE_POINTER,
 251                   G_TYPE_BOOLEAN);
 252 }
 253
 254
 255 static void
 256 gtk_path_bar_finalize (GObject *object)
 257 {
 258   GtkPathBar *path_bar;
 259
 260   path_bar = GTK_PATH_BAR (object);
 261
 262   gtk_path_bar_stop_scrolling (path_bar);
 263
 264   g_list_free (path_bar->button_list);
 265   if (path_bar->root_file)
 266     g_object_unref (path_bar->root_file);
 267   if (path_bar->home_file)
 268     g_object_unref (path_bar->home_file);
 269   if (path_bar->desktop_file)
 270     g_object_unref (path_bar->desktop_file);
 271
 272   if (path_bar->root_icon)
 273     g_object_unref (path_bar->root_icon);
 274   if (path_bar->home_icon)
 275     g_object_unref (path_bar->home_icon);
 276   if (path_bar->desktop_icon)
 277     g_object_unref (path_bar->desktop_icon);
 278
 279   if (path_bar->file_system)
 280     g_object_unref (path_bar->file_system);
 281
 282   G_OBJECT_CLASS (gtk_path_bar_parent_class)->finalize (object);
 283 }
 284
 285 /* Removes the settings signal handler.  It's safe to call multiple times */
 286 static void
 287 remove_settings_signal (GtkPathBar *path_bar,
 288                         GdkScreen  *screen)
 289 {
 290   if (path_bar->settings_signal_id)
 291     {
 292       GtkSettings *settings;
 293
 294       settings = gtk_settings_get_for_screen (screen);
 295       g_signal_handler_disconnect (settings,
 296                                    path_bar->settings_signal_id);
 297       path_bar->settings_signal_id = 0;
 298     }
 299 }
 300
 301 static void
 302 gtk_path_bar_dispose (GObject *object)
 303 {
 304   GtkPathBar *path_bar = GTK_PATH_BAR (object);
 305
 306   remove_settings_signal (path_bar, gtk_widget_get_screen (GTK_WIDGET (object)));
 307
 308   if (path_bar->get_info_cancellable)
 309     g_cancellable_cancel (path_bar->get_info_cancellable);
 310   path_bar->get_info_cancellable = NULL;
 311
 312   G_OBJECT_CLASS (gtk_path_bar_parent_class)->dispose (object);
 313 }
 314
 315 /* Size requisition:
 316  *
 317  * Ideally, our size is determined by another widget, and we are just filling
 318  * available space.
 319  */
 320 static void
 321 gtk_path_bar_get_preferred_width (GtkWidget *widget,
 322                                   gint      *minimum,
 323                                   gint      *natural)
 324 {
 325   ButtonData *button_data;
 326   GtkPathBar *path_bar;
 327   GList *list;
 328   gint child_height;
 329   gint height;
 330   gint child_min, child_nat;
 331
 332   path_bar = GTK_PATH_BAR (widget);
 333
 334   *minimum = *natural = 0;
 335   height = 0;
 336
 337   for (list = path_bar->button_list; list; list = list->next)
 338     {
 339       button_data = BUTTON_DATA (list->data);
 340       gtk_widget_get_preferred_width (button_data->button, &child_min, &child_nat);
 341       gtk_widget_get_preferred_height (button_data->button, &child_height, NULL);
 342       height = MAX (height, child_height);
 343
 344       if (button_data->type == NORMAL_BUTTON)
 345         {
 346           /* Use 2*Height as button width because of ellipsized label.  */
 347           child_min = MAX (child_min, child_height * 2);
 348           child_nat = MAX (child_min, child_height * 2);
 349         }
 350
 351       *minimum = MAX (*minimum, child_min);
 352       *natural = MAX (*natural, child_nat);
 353     }
 354
 355   /* Add space for slider, if we have more than one path */
 356   /* Theoretically, the slider could be bigger than the other button.  But we're
 357    * not going to worry about that now.
 358    */
 359   path_bar->slider_width = MIN (height * 2 / 3 + 5, height);
 360   if (path_bar->button_list && path_bar->button_list->next != NULL)
 361     {
 362       *minimum += (path_bar->spacing + path_bar->slider_width) * 2;
 363       *natural += (path_bar->spacing + path_bar->slider_width) * 2;
 364     }
 365 }
 366
 367 static void
 368 gtk_path_bar_get_preferred_height (GtkWidget *widget,
 369                                    gint      *minimum,
 370                                    gint      *natural)
 371 {
 372   ButtonData *button_data;
 373   GtkPathBar *path_bar;
 374   GList *list;
 375   gint child_min, child_nat;
 376
 377   path_bar = GTK_PATH_BAR (widget);
 378
 379   *minimum = *natural = 0;
 380
 381   for (list = path_bar->button_list; list; list = list->next)
 382     {
 383       button_data = BUTTON_DATA (list->data);
 384       gtk_widget_get_preferred_height (button_data->button, &child_min, &child_nat);
 385
 386       *minimum = MAX (*minimum, child_min);
 387       *natural = MAX (*natural, child_nat);
 388     }
 389 }
 390
 391 static void
 392 gtk_path_bar_update_slider_buttons (GtkPathBar *path_bar)
 393 {
 394   if (path_bar->button_list)
 395     {
 396       GtkWidget *button;
 397
 398       button = BUTTON_DATA (path_bar->button_list->data)->button;
 399       if (gtk_widget_get_child_visible (button))
 400         {
 401           gtk_path_bar_stop_scrolling (path_bar);
 402           gtk_widget_set_sensitive (path_bar->down_slider_button, FALSE);
 403         }
 404       else
 405         gtk_widget_set_sensitive (path_bar->down_slider_button, TRUE);
 406
 407       button = BUTTON_DATA (g_list_last (path_bar->button_list)->data)->button;
 408       if (gtk_widget_get_child_visible (button))
 409         {
 410           gtk_path_bar_stop_scrolling (path_bar);
 411           gtk_widget_set_sensitive (path_bar->up_slider_button, FALSE);
 412         }
 413       else
 414         gtk_widget_set_sensitive (path_bar->up_slider_button, TRUE);
 415     }
 416 }
 417
 418 static void
 419 gtk_path_bar_map (GtkWidget *widget)
 420 {
 421   gdk_window_show (GTK_PATH_BAR (widget)->event_window);
 422
 423   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->map (widget);
 424 }
 425
 426 static void
 427 gtk_path_bar_unmap (GtkWidget *widget)
 428 {
 429   gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 430   gdk_window_hide (GTK_PATH_BAR (widget)->event_window);
 431
 432   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unmap (widget);
 433 }
 434
 435 static void
 436 gtk_path_bar_realize (GtkWidget *widget)
 437 {
 438   GtkPathBar *path_bar;
 439   GtkAllocation allocation;
 440   GdkWindow *window;
 441   GdkWindowAttr attributes;
 442   gint attributes_mask;
 443
 444   gtk_widget_set_realized (widget, TRUE);
 445
 446   path_bar = GTK_PATH_BAR (widget);
 447   window = gtk_widget_get_parent_window (widget);
 448   gtk_widget_set_window (widget, window);
 449   g_object_ref (window);
 450
 451   gtk_widget_get_allocation (widget, &allocation);
 452
 453   attributes.window_type = GDK_WINDOW_CHILD;
 454   attributes.x = allocation.x;
 455   attributes.y = allocation.y;
 456   attributes.width = allocation.width;
 457   attributes.height = allocation.height;
 458   attributes.wclass = GDK_INPUT_ONLY;
 459   attributes.event_mask = gtk_widget_get_events (widget);
 460   attributes.event_mask |= GDK_SCROLL_MASK;
 461   attributes_mask = GDK_WA_X | GDK_WA_Y;
 462
 463   path_bar->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
 464                                            &attributes, attributes_mask);
 465   gdk_window_set_user_data (path_bar->event_window, widget);
 466 }
 467
 468 static void
 469 gtk_path_bar_unrealize (GtkWidget *widget)
 470 {
 471   GtkPathBar *path_bar;
 472
 473   path_bar = GTK_PATH_BAR (widget);
 474
 475   gdk_window_set_user_data (path_bar->event_window, NULL);
 476   gdk_window_destroy (path_bar->event_window);
 477   path_bar->event_window = NULL;
 478
 479   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unrealize (widget);
 480 }
 481
 482 /* This is a tad complicated
 483  */
 484 static void
 485 gtk_path_bar_size_allocate (GtkWidget     *widget,
 486                             GtkAllocation *allocation)
 487 {
 488   GtkWidget *child;
 489   GtkPathBar *path_bar = GTK_PATH_BAR (widget);
 490   GtkTextDirection direction;
 491   GtkAllocation child_allocation;
 492   GList *list, *first_button;
 493   gint width;
 494   gint allocation_width;
 495   gboolean need_sliders = FALSE;
 496   gint up_slider_offset = 0;
 497   GtkRequisition child_requisition;
 498
 499   gtk_widget_set_allocation (widget, allocation);
 500
 501   if (gtk_widget_get_realized (widget))
 502     gdk_window_move_resize (path_bar->event_window,
 503                             allocation->x, allocation->y,
 504                             allocation->width, allocation->height);
 505
 506   /* No path is set; we don't have to allocate anything. */
 507   if (path_bar->button_list == NULL)
 508     return;
 509
 510   direction = gtk_widget_get_direction (widget);
 511   allocation_width = allocation->width;
 512
 513   /* First, we check to see if we need the scrollbars. */
 514   if (path_bar->fake_root)
 515     width = path_bar->spacing + path_bar->slider_width;
 516   else
 517     width = 0;
 518
 519   for (list = path_bar->button_list; list; list = list->next)
 520     {
 521       child = BUTTON_DATA (list->data)->button;
 522
 523       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 524
 525       width += child_requisition.width + path_bar->spacing;
 526       if (list == path_bar->fake_root)
 527         break;
 528     }
 529
 530   if (width <= allocation_width)
 531     {
 532       if (path_bar->fake_root)
 533         first_button = path_bar->fake_root;
 534       else
 535         first_button = g_list_last (path_bar->button_list);
 536     }
 537   else
 538     {
 539       gboolean reached_end = FALSE;
 540       gint slider_space = 2 * (path_bar->spacing + path_bar->slider_width);
 541
 542       if (path_bar->first_scrolled_button)
 543         first_button = path_bar->first_scrolled_button;
 544       else
 545         first_button = path_bar->button_list;
 546       need_sliders = TRUE;
 547
 548       /* To see how much space we have, and how many buttons we can display.
 549        * We start at the first button, count forward until hit the new
 550        * button, then count backwards.
 551        */
 552       /* Count down the path chain towards the end. */
 553       gtk_widget_get_preferred_size (BUTTON_DATA (first_button->data)->button,
 554                                      &child_requisition, NULL);
 555
 556       width = child_requisition.width;
 557       list = first_button->prev;
 558       while (list && !reached_end)
 559         {
 560           child = BUTTON_DATA (list->data)->button;
 561
 562           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 563
 564           if (width + child_requisition.width +
 565               path_bar->spacing + slider_space > allocation_width)
 566             reached_end = TRUE;
 567           else if (list == path_bar->fake_root)
 568             break;
 569           else
 570             width += child_requisition.width + path_bar->spacing;
 571
 572           list = list->prev;
 573         }
 574
 575       /* Finally, we walk up, seeing how many of the previous buttons we can
 576        * add */
 577       while (first_button->next && !reached_end)
 578         {
 579           child = BUTTON_DATA (first_button->next->data)->button;
 580
 581           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 582
 583           if (width + child_requisition.width + path_bar->spacing + slider_space > allocation_width)
 584             {
 585               reached_end = TRUE;
 586             }
 587           else
 588             {
 589               width += child_requisition.width + path_bar->spacing;
 590               if (first_button == path_bar->fake_root)
 591                 break;
 592               first_button = first_button->next;
 593             }
 594         }
 595     }
 596
 597   /* Now, we allocate space to the buttons */
 598   child_allocation.y = allocation->y;
 599   child_allocation.height = allocation->height;
 600
 601   if (direction == GTK_TEXT_DIR_RTL)
 602     {
 603       child_allocation.x = allocation->x + allocation->width;
 604       if (need_sliders || path_bar->fake_root)
 605         {
 606           child_allocation.x -= (path_bar->spacing + path_bar->slider_width);
 607           up_slider_offset = allocation->width - path_bar->slider_width;
 608         }
 609     }
 610   else
 611     {
 612       child_allocation.x = allocation->x;
 613       if (need_sliders || path_bar->fake_root)
 614         {
 615           up_slider_offset = 0;
 616           child_allocation.x += (path_bar->spacing + path_bar->slider_width);
 617         }
 618     }
 619
 620   for (list = first_button; list; list = list->prev)
 621     {
 622       GtkAllocation widget_allocation;
 623       ButtonData *button_data;
 624
 625       button_data = BUTTON_DATA (list->data);
 626       child = button_data->button;
 627
 628       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 629
 630       child_allocation.width = MIN (child_requisition.width,
 631                                     allocation_width - (path_bar->spacing + path_bar->slider_width) * 2);
 632
 633       if (direction == GTK_TEXT_DIR_RTL)
 634         child_allocation.x -= child_allocation.width;
 635
 636       /* Check to see if we've don't have any more space to allocate buttons */
 637       if (need_sliders && direction == GTK_TEXT_DIR_RTL)
 638         {
 639           gtk_widget_get_allocation (widget, &widget_allocation);
 640           if (child_allocation.x - path_bar->spacing - path_bar->slider_width < widget_allocation.x)
 641             break;
 642         }
 643       else if (need_sliders && direction == GTK_TEXT_DIR_LTR)
 644         {
 645           gtk_widget_get_allocation (widget, &widget_allocation);
 646           if (child_allocation.x + child_allocation.width + path_bar->spacing + path_bar->slider_width >
 647               widget_allocation.x + allocation_width)
 648             break;
 649         }
 650
 651       if (child_allocation.width < child_requisition.width)
 652         {
 653           if (!gtk_widget_get_has_tooltip (child))
 654             gtk_widget_set_tooltip_text (child, button_data->dir_name);
 655         }
 656       else if (gtk_widget_get_has_tooltip (child))
 657         gtk_widget_set_tooltip_text (child, NULL);
 658
 659       gtk_widget_set_child_visible (child, TRUE);
 660       gtk_widget_size_allocate (child, &child_allocation);
 661
 662       if (direction == GTK_TEXT_DIR_RTL)
 663         child_allocation.x -= path_bar->spacing;
 664       else
 665         child_allocation.x += child_allocation.width + path_bar->spacing;
 666     }
 667   /* Now we go hide all the widgets that don't fit */
 668   while (list)
 669     {
 670       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 671       list = list->prev;
 672     }
 673   for (list = first_button->next; list; list = list->next)
 674     {
 675       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 676     }
 677
 678   if (need_sliders || path_bar->fake_root)
 679     {
 680       child_allocation.width = path_bar->slider_width;
 681       child_allocation.x = up_slider_offset + allocation->x;
 682       gtk_widget_size_allocate (path_bar->up_slider_button, &child_allocation);
 683
 684       gtk_widget_set_child_visible (path_bar->up_slider_button, TRUE);
 685       gtk_widget_show_all (path_bar->up_slider_button);
 686     }
 687   else
 688     gtk_widget_set_child_visible (path_bar->up_slider_button, FALSE);
 689
 690   if (need_sliders)
 691     {
 692       child_allocation.width = path_bar->slider_width;
 693
 694       if (direction == GTK_TEXT_DIR_RTL)
 695         child_allocation.x = 0;
 696       else
 697         child_allocation.x = allocation->width - path_bar->slider_width;
 698
 699       child_allocation.x += allocation->x;
 700
 701       gtk_widget_size_allocate (path_bar->down_slider_button, &child_allocation);
 702
 703       gtk_widget_set_child_visible (path_bar->down_slider_button, TRUE);
 704       gtk_widget_show_all (path_bar->down_slider_button);
 705       gtk_path_bar_update_slider_buttons (path_bar);
 706     }
 707   else
 708     gtk_widget_set_child_visible (path_bar->down_slider_button, FALSE);
 709 }
 710
 711 static void
 712 gtk_path_bar_style_updated (GtkWidget *widget)
 713 {
 714   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_updated (widget);
 715
 716   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 717 }
 718
 719 static void
 720 gtk_path_bar_screen_changed (GtkWidget *widget,
 721                              GdkScreen *previous_screen)
 722 {
 723   if (GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed)
 724     GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed (widget, previous_screen);
 725
 726   /* We might nave a new settings, so we remove the old one */
 727   if (previous_screen)
 728     remove_settings_signal (GTK_PATH_BAR (widget), previous_screen);
 729
 730   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 731 }
 732
 733 static gboolean
 734 gtk_path_bar_scroll (GtkWidget      *widget,
 735                      GdkEventScroll *event)
 736 {
 737   switch (event->direction)
 738     {
 739     case GDK_SCROLL_RIGHT:
 740     case GDK_SCROLL_DOWN:
 741       gtk_path_bar_scroll_down (GTK_PATH_BAR (widget));
 742       break;
 743     case GDK_SCROLL_LEFT:
 744     case GDK_SCROLL_UP:
 745       gtk_path_bar_scroll_up (GTK_PATH_BAR (widget));
 746       break;
 747     }
 748
 749   return TRUE;
 750 }
 751
 752 static void
 753 gtk_path_bar_add (GtkContainer *container,
 754                   GtkWidget    *widget)
 755 {
 756   gtk_widget_set_parent (widget, GTK_WIDGET (container));
 757 }
 758
 759 static void
 760 gtk_path_bar_remove_1 (GtkContainer *container,
 761                        GtkWidget    *widget)
 762 {
 763   gboolean was_visible = gtk_widget_get_visible (widget);
 764   gtk_widget_unparent (widget);
 765   if (was_visible)
 766     gtk_widget_queue_resize (GTK_WIDGET (container));
 767 }
 768
 769 static void
 770 gtk_path_bar_remove (GtkContainer *container,
 771                      GtkWidget    *widget)
 772 {
 773   GtkPathBar *path_bar;
 774   GList *children;
 775
 776   path_bar = GTK_PATH_BAR (container);
 777
 778   if (widget == path_bar->up_slider_button)
 779     {
 780       gtk_path_bar_remove_1 (container, widget);
 781       path_bar->up_slider_button = NULL;
 782       return;
 783     }
 784
 785   if (widget == path_bar->down_slider_button)
 786     {
 787       gtk_path_bar_remove_1 (container, widget);
 788       path_bar->down_slider_button = NULL;
 789       return;
 790     }
 791
 792   children = path_bar->button_list;
 793   while (children)
 794     {
 795       if (widget == BUTTON_DATA (children->data)->button)
 796         {
 797           gtk_path_bar_remove_1 (container, widget);
 798           path_bar->button_list = g_list_remove_link (path_bar->button_list, children);
 799           g_list_free (children);
 800           return;
 801         }
 802
 803       children = children->next;
 804     }
 805 }
 806
 807 static void
 808 gtk_path_bar_forall (GtkContainer *container,
 809                      gboolean      include_internals,
 810                      GtkCallback   callback,
 811                      gpointer      callback_data)
 812 {
 813   GtkPathBar *path_bar;
 814   GList *children;
 815
 816   g_return_if_fail (callback != NULL);
 817   path_bar = GTK_PATH_BAR (container);
 818
 819   children = path_bar->button_list;
 820   while (children)
 821     {
 822       GtkWidget *child;
 823       child = BUTTON_DATA (children->data)->button;
 824       children = children->next;
 825
 826       (* callback) (child, callback_data);
 827     }
 828
 829   if (path_bar->up_slider_button)
 830     (* callback) (path_bar->up_slider_button, callback_data);
 831
 832   if (path_bar->down_slider_button)
 833     (* callback) (path_bar->down_slider_button, callback_data);
 834 }
 835
 836 static void
 837 gtk_path_bar_scroll_down (GtkPathBar *path_bar)
 838 {
 839   GtkAllocation allocation, button_allocation;
 840   GList *list;
 841   GList *down_button = NULL;
 842   gint space_available;
 843
 844   if (path_bar->ignore_click)
 845     {
 846       path_bar->ignore_click = FALSE;
 847       return;
 848     }
 849
 850   if (gtk_widget_get_child_visible (BUTTON_DATA (path_bar->button_list->data)->button))
 851     {
 852       /* Return if the last button is already visible */
 853       return;
 854     }
 855
 856   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 857
 858   /* We find the button at the 'down' end that we have to make
 859    * visible */
 860   for (list = path_bar->button_list; list; list = list->next)
 861     {
 862       if (list->next && gtk_widget_get_child_visible (BUTTON_DATA (list->next->data)->button))
 863         {
 864           down_button = list;
 865           break;
 866         }
 867     }
 868
 869   gtk_widget_get_allocation (GTK_WIDGET (path_bar), &allocation);
 870   gtk_widget_get_allocation (BUTTON_DATA (down_button->data)->button, &button_allocation);
 871
 872   space_available = (allocation.width
 873                      - 2 * path_bar->spacing - 2 * path_bar->slider_width
 874                      - button_allocation.width);
 875   path_bar->first_scrolled_button = down_button;
 876
 877   /* We have space_available free space that's not being used.
 878    * So we walk down from the end, adding buttons until we use all free space.
 879    */
 880   while (space_available > 0)
 881     {
 882       path_bar->first_scrolled_button = down_button;
 883       down_button = down_button->next;
 884       if (!down_button)
 885         break;
 886       space_available -= (button_allocation.width
 887                           + path_bar->spacing);
 888     }
 889 }
 890
 891 static void
 892 gtk_path_bar_scroll_up (GtkPathBar *path_bar)
 893 {
 894   GList *list;
 895
 896   if (path_bar->ignore_click)
 897     {
 898       path_bar->ignore_click = FALSE;
 899       return;
 900     }
 901
 902   list = g_list_last (path_bar->button_list);
 903
 904   if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
 905     {
 906       /* Return if the first button is already visible */
 907       return;
 908     }
 909
 910   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 911
 912   for ( ; list; list = list->prev)
 913     {
 914       if (list->prev && gtk_widget_get_child_visible (BUTTON_DATA (list->prev->data)->button))
 915         {
 916           if (list->prev == path_bar->fake_root)
 917             path_bar->fake_root = NULL;
 918           path_bar->first_scrolled_button = list;
 919           return;
 920         }
 921     }
 922 }
 923
 924 static gboolean
 925 gtk_path_bar_scroll_timeout (GtkPathBar *path_bar)
 926 {
 927   gboolean retval = FALSE;
 928
 929   if (path_bar->timer)
 930     {
 931       if (path_bar->scrolling_up)
 932         gtk_path_bar_scroll_up (path_bar);
 933       else if (path_bar->scrolling_down)
 934         gtk_path_bar_scroll_down (path_bar);
 935
 936       if (path_bar->need_timer)
 937         {
 938           GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (path_bar));
 939           guint        timeout;
 940
 941           g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
 942
 943           path_bar->need_timer = FALSE;
 944
 945           path_bar->timer = gdk_threads_add_timeout (timeout * SCROLL_DELAY_FACTOR,
 946                                            (GSourceFunc)gtk_path_bar_scroll_timeout,
 947                                            path_bar);
 948         }
 949       else
 950         retval = TRUE;
 951     }
 952
 953   return retval;
 954 }
 955
 956 static void
 957 gtk_path_bar_stop_scrolling (GtkPathBar *path_bar)
 958 {
 959   if (path_bar->timer)
 960     {
 961       g_source_remove (path_bar->timer);
 962       path_bar->timer = 0;
 963       path_bar->need_timer = FALSE;
 964     }
 965 }
 966
 967 static gboolean
 968 gtk_path_bar_slider_up_defocus (GtkWidget      *widget,
 969                                     GdkEventButton *event,
 970                                     GtkPathBar     *path_bar)
 971 {
 972   GList *list;
 973   GList *up_button = NULL;
 974
 975   if (event->type != GDK_FOCUS_CHANGE)
 976     return FALSE;
 977
 978   for (list = g_list_last (path_bar->button_list); list; list = list->prev)
 979     {
 980       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
 981         {
 982           up_button = list;
 983           break;
 984         }
 985     }
 986
 987   /* don't let the focus vanish */
 988   if ((!gtk_widget_is_sensitive (path_bar->up_slider_button)) ||
 989       (!gtk_widget_get_child_visible (path_bar->up_slider_button)))
 990     gtk_widget_grab_focus (BUTTON_DATA (up_button->data)->button);
 991
 992   return FALSE;
 993 }
 994
 995 static gboolean
 996 gtk_path_bar_slider_down_defocus (GtkWidget      *widget,
 997                                     GdkEventButton *event,
 998                                     GtkPathBar     *path_bar)
 999 {
1000   GList *list;
1001   GList *down_button = NULL;
1002
1003   if (event->type != GDK_FOCUS_CHANGE)
1004     return FALSE;
1005
1006   for (list = path_bar->button_list; list; list = list->next)
1007     {
1008       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
1009         {
1010           down_button = list;
1011           break;
1012         }
1013     }
1014
1015   /* don't let the focus vanish */
1016   if ((!gtk_widget_is_sensitive (path_bar->down_slider_button)) ||
1017       (!gtk_widget_get_child_visible (path_bar->down_slider_button)))
1018     gtk_widget_grab_focus (BUTTON_DATA (down_button->data)->button);
1019
1020   return FALSE;
1021 }
1022
1023 static gboolean
1024 gtk_path_bar_slider_button_press (GtkWidget      *widget,
1025                                   GdkEventButton *event,
1026                                   GtkPathBar     *path_bar)
1027 {
1028   if (event->type != GDK_BUTTON_PRESS || event->button != 1)
1029     return FALSE;
1030
1031   path_bar->ignore_click = FALSE;
1032
1033   if (widget == path_bar->up_slider_button)
1034     {
1035       path_bar->scrolling_down = FALSE;
1036       path_bar->scrolling_up = TRUE;
1037       gtk_path_bar_scroll_up (path_bar);
1038     }
1039   else if (widget == path_bar->down_slider_button)
1040     {
1041       path_bar->scrolling_up = FALSE;
1042       path_bar->scrolling_down = TRUE;
1043       gtk_path_bar_scroll_down (path_bar);
1044     }
1045
1046   if (!path_bar->timer)
1047     {
1048       GtkSettings *settings = gtk_widget_get_settings (widget);
1049       guint        timeout;
1050
1051       g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
1052
1053       path_bar->need_timer = TRUE;
1054       path_bar->timer = gdk_threads_add_timeout (timeout,
1055                                        (GSourceFunc)gtk_path_bar_scroll_timeout,
1056                                        path_bar);
1057     }
1058
1059   return FALSE;
1060 }
1061
1062 static gboolean
1063 gtk_path_bar_slider_button_release (GtkWidget      *widget,
1064                                     GdkEventButton *event,
1065                                     GtkPathBar     *path_bar)
1066 {
1067   if (event->type != GDK_BUTTON_RELEASE)
1068     return FALSE;
1069
1070   path_bar->ignore_click = TRUE;
1071   gtk_path_bar_stop_scrolling (path_bar);
1072
1073   return FALSE;
1074 }
1075
1076 static void
1077 gtk_path_bar_grab_notify (GtkWidget *widget,
1078                           gboolean   was_grabbed)
1079 {
1080   if (!was_grabbed)
1081     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1082 }
1083
1084 static void
1085 gtk_path_bar_state_changed (GtkWidget    *widget,
1086                             GtkStateType  previous_state)
1087 {
1088   if (!gtk_widget_is_sensitive (widget))
1089     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1090 }
1091
1092
1093 /* Changes the icons wherever it is needed */
1094 static void
1095 reload_icons (GtkPathBar *path_bar)
1096 {
1097   GList *list;
1098
1099   if (path_bar->root_icon)
1100     {
1101       g_object_unref (path_bar->root_icon);
1102       path_bar->root_icon = NULL;
1103     }
1104   if (path_bar->home_icon)
1105     {
1106       g_object_unref (path_bar->home_icon);
1107       path_bar->home_icon = NULL;
1108     }
1109   if (path_bar->desktop_icon)
1110     {
1111       g_object_unref (path_bar->desktop_icon);
1112       path_bar->desktop_icon = NULL;
1113     }
1114
1115   for (list = path_bar->button_list; list; list = list->next)
1116     {
1117       ButtonData *button_data;
1118       gboolean current_dir;
1119
1120       button_data = BUTTON_DATA (list->data);
1121       if (button_data->type != NORMAL_BUTTON)
1122         {
1123           current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button));
1124           gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1125         }
1126     }
1127
1128 }
1129
1130 static void
1131 change_icon_theme (GtkPathBar *path_bar)
1132 {
1133   GtkSettings *settings;
1134   gint width, height;
1135
1136   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1137
1138   if (gtk_icon_size_lookup_for_settings (settings, GTK_ICON_SIZE_MENU, &width, &height))
1139     path_bar->icon_size = MAX (width, height);
1140   else
1141     path_bar->icon_size = FALLBACK_ICON_SIZE;
1142
1143   reload_icons (path_bar);
1144 }
1145 /* Callback used when a GtkSettings value changes */
1146 static void
1147 settings_notify_cb (GObject    *object,
1148                     GParamSpec *pspec,
1149                     GtkPathBar *path_bar)
1150 {
1151   const char *name;
1152
1153   name = g_param_spec_get_name (pspec);
1154
1155   if (! strcmp (name, "gtk-icon-theme-name") ||
1156       ! strcmp (name, "gtk-icon-sizes"))
1157     change_icon_theme (path_bar);
1158 }
1159
1160 static void
1161 gtk_path_bar_check_icon_theme (GtkPathBar *path_bar)
1162 {
1163   GtkSettings *settings;
1164
1165   if (path_bar->settings_signal_id)
1166     return;
1167
1168   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1169   path_bar->settings_signal_id = g_signal_connect (settings, "notify", G_CALLBACK (settings_notify_cb), path_bar);
1170
1171   change_icon_theme (path_bar);
1172 }
1173
1174 /* Public functions and their helpers */
1175 static void
1176 gtk_path_bar_clear_buttons (GtkPathBar *path_bar)
1177 {
1178   while (path_bar->button_list != NULL)
1179     {
1180       gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (path_bar->button_list->data)->button);
1181     }
1182   path_bar->first_scrolled_button = NULL;
1183   path_bar->fake_root = NULL;
1184 }
1185
1186 static void
1187 button_clicked_cb (GtkWidget *button,
1188                    gpointer   data)
1189 {
1190   ButtonData *button_data;
1191   GtkPathBar *path_bar;
1192   GList *button_list;
1193   gboolean child_is_hidden;
1194   GFile *child_file;
1195
1196   button_data = BUTTON_DATA (data);
1197   if (button_data->ignore_changes)
1198     return;
1199
1200   path_bar = GTK_PATH_BAR (gtk_widget_get_parent (button));
1201
1202   button_list = g_list_find (path_bar->button_list, button_data);
1203   g_assert (button_list != NULL);
1204
1205   g_signal_handlers_block_by_func (button,
1206                                    G_CALLBACK (button_clicked_cb), data);
1207   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
1208   g_signal_handlers_unblock_by_func (button,
1209                                      G_CALLBACK (button_clicked_cb), data);
1210
1211   if (button_list->prev)
1212     {
1213       ButtonData *child_data;
1214
1215       child_data = BUTTON_DATA (button_list->prev->data);
1216       child_file = child_data->file;
1217       child_is_hidden = child_data->file_is_hidden;
1218     }
1219   else
1220     {
1221       child_file = NULL;
1222       child_is_hidden = FALSE;
1223     }
1224
1225   g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0,
1226                  button_data->file, child_file, child_is_hidden);
1227 }
1228
1229 struct SetButtonImageData
1230 {
1231   GtkPathBar *path_bar;
1232   ButtonData *button_data;
1233 };
1234
1235 static void
1236 set_button_image_get_info_cb (GCancellable *cancellable,
1237                               GFileInfo    *info,
1238                               const GError *error,
1239                               gpointer      user_data)
1240 {
1241   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1242   GdkPixbuf *pixbuf;
1243   struct SetButtonImageData *data = user_data;
1244
1245   if (cancellable != data->button_data->cancellable)
1246     goto out;
1247
1248   data->button_data->cancellable = NULL;
1249
1250   if (!data->button_data->button)
1251     {
1252       g_free (data->button_data);
1253       goto out;
1254     }
1255
1256   if (cancelled || error)
1257     goto out;
1258
1259   pixbuf = _gtk_file_info_render_icon (info, GTK_WIDGET (data->path_bar),
1260                                        data->path_bar->icon_size);
1261   gtk_image_set_from_pixbuf (GTK_IMAGE (data->button_data->image), pixbuf);
1262
1263   switch (data->button_data->type)
1264     {
1265       case HOME_BUTTON:
1266         if (data->path_bar->home_icon)
1267           g_object_unref (pixbuf);
1268         else
1269           data->path_bar->home_icon = pixbuf;
1270         break;
1271
1272       case DESKTOP_BUTTON:
1273         if (data->path_bar->desktop_icon)
1274           g_object_unref (pixbuf);
1275         else
1276           data->path_bar->desktop_icon = pixbuf;
1277         break;
1278
1279       default:
1280         break;
1281     };
1282
1283 out:
1284   g_free (data);
1285   g_object_unref (cancellable);
1286 }
1287
1288 static void
1289 set_button_image (GtkPathBar *path_bar,
1290                   ButtonData *button_data)
1291 {
1292   GtkFileSystemVolume *volume;
1293   struct SetButtonImageData *data;
1294
1295   switch (button_data->type)
1296     {
1297     case ROOT_BUTTON:
1298
1299       if (path_bar->root_icon != NULL)
1300         {
1301           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1302           break;
1303         }
1304
1305       volume = _gtk_file_system_get_volume_for_file (path_bar->file_system, path_bar->root_file);
1306       if (volume == NULL)
1307         return;
1308
1309       path_bar->root_icon = _gtk_file_system_volume_render_icon (volume,
1310                                                                  GTK_WIDGET (path_bar),
1311                                                                  path_bar->icon_size,
1312                                                                  NULL);
1313       _gtk_file_system_volume_unref (volume);
1314
1315       gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1316       break;
1317
1318     case HOME_BUTTON:
1319       if (path_bar->home_icon != NULL)
1320         {
1321           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->home_icon);
1322           break;
1323         }
1324
1325       data = g_new0 (struct SetButtonImageData, 1);
1326       data->path_bar = path_bar;
1327       data->button_data = button_data;
1328
1329       if (button_data->cancellable)
1330         g_cancellable_cancel (button_data->cancellable);
1331
1332       button_data->cancellable =
1333         _gtk_file_system_get_info (path_bar->file_system,
1334                                    path_bar->home_file,
1335                                    "standard::icon",
1336                                    set_button_image_get_info_cb,
1337                                    data);
1338       break;
1339
1340     case DESKTOP_BUTTON:
1341       if (path_bar->desktop_icon != NULL)
1342         {
1343           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->desktop_icon);
1344           break;
1345         }
1346
1347       data = g_new0 (struct SetButtonImageData, 1);
1348       data->path_bar = path_bar;
1349       data->button_data = button_data;
1350
1351       if (button_data->cancellable)
1352         g_cancellable_cancel (button_data->cancellable);
1353
1354       button_data->cancellable =
1355         _gtk_file_system_get_info (path_bar->file_system,
1356                                    path_bar->desktop_file,
1357                                    "standard::icon",
1358                                    set_button_image_get_info_cb,
1359                                    data);
1360       break;
1361     default:
1362       break;
1363     }
1364 }
1365
1366 static void
1367 button_data_free (ButtonData *button_data)
1368 {
1369   if (button_data->file)
1370     g_object_unref (button_data->file);
1371   button_data->file = NULL;
1372
1373   g_free (button_data->dir_name);
1374   button_data->dir_name = NULL;
1375
1376   button_data->button = NULL;
1377
1378   if (button_data->cancellable)
1379     g_cancellable_cancel (button_data->cancellable);
1380   else
1381     g_free (button_data);
1382 }
1383
1384 static const char *
1385 get_dir_name (ButtonData *button_data)
1386 {
1387   return button_data->dir_name;
1388 }
1389
1390 /* We always want to request the same size for the label, whether
1391  * or not the contents are bold
1392  */
1393 static void
1394 set_label_size_request (GtkWidget  *widget,
1395                         ButtonData *button_data)
1396 {
1397   const gchar *dir_name = get_dir_name (button_data);
1398   PangoLayout *layout = gtk_widget_create_pango_layout (button_data->label, dir_name);
1399   gint width, height, bold_width, bold_height;
1400   gchar *markup;
1401
1402   pango_layout_get_pixel_size (layout, &width, &height);
1403
1404   markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1405   pango_layout_set_markup (layout, markup, -1);
1406   g_free (markup);
1407
1408   pango_layout_get_pixel_size (layout, &bold_width, &bold_height);
1409
1410   gtk_widget_set_size_request (widget,
1411                                MAX (width, bold_width),
1412                                MAX (height, bold_height));
1413   g_object_unref (layout);
1414 }
1415
1416 static void
1417 gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
1418                                        ButtonData *button_data,
1419                                        gboolean    current_dir)
1420 {
1421   const gchar *dir_name = get_dir_name (button_data);
1422
1423   if (button_data->label != NULL)
1424     {
1425       if (current_dir)
1426         {
1427           char *markup;
1428
1429           markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1430           gtk_label_set_markup (GTK_LABEL (button_data->label), markup);
1431           g_free (markup);
1432         }
1433       else
1434         {
1435           gtk_label_set_text (GTK_LABEL (button_data->label), dir_name);
1436         }
1437     }
1438
1439   if (button_data->image != NULL)
1440     {
1441       set_button_image (path_bar, button_data);
1442     }
1443
1444   if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir)
1445     {
1446       button_data->ignore_changes = TRUE;
1447       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir);
1448       button_data->ignore_changes = FALSE;
1449     }
1450 }
1451
1452 static ButtonType
1453 find_button_type (GtkPathBar  *path_bar,
1454                   GFile       *file)
1455 {
1456   if (path_bar->root_file != NULL &&
1457       g_file_equal (file, path_bar->root_file))
1458     return ROOT_BUTTON;
1459   if (path_bar->home_file != NULL &&
1460       g_file_equal (file, path_bar->home_file))
1461     return HOME_BUTTON;
1462   if (path_bar->desktop_file != NULL &&
1463       g_file_equal (file, path_bar->desktop_file))
1464     return DESKTOP_BUTTON;
1465
1466  return NORMAL_BUTTON;
1467 }
1468
1469 static void
1470 button_drag_data_get_cb (GtkWidget        *widget,
1471                          GdkDragContext   *context,
1472                          GtkSelectionData *selection_data,
1473                          guint             info,
1474                          guint             time_,
1475                          gpointer          data)
1476 {
1477   ButtonData *button_data;
1478   char *uris[2];
1479
1480   button_data = data;
1481
1482   uris[0] = g_file_get_uri (button_data->file);
1483   uris[1] = NULL;
1484
1485   gtk_selection_data_set_uris (selection_data, uris);
1486
1487   g_free (uris[0]);
1488 }
1489
1490 static ButtonData *
1491 make_directory_button (GtkPathBar  *path_bar,
1492                        const char  *dir_name,
1493                        GFile       *file,
1494                        gboolean     current_dir,
1495                        gboolean     file_is_hidden)
1496 {
1497   AtkObject *atk_obj;
1498   GtkWidget *child = NULL;
1499   ButtonData *button_data;
1500
1501   file_is_hidden = !! file_is_hidden;
1502   /* Is it a special button? */
1503   button_data = g_new0 (ButtonData, 1);
1504
1505   button_data->type = find_button_type (path_bar, file);
1506   button_data->button = gtk_toggle_button_new ();
1507   atk_obj = gtk_widget_get_accessible (button_data->button);
1508   gtk_button_set_focus_on_click (GTK_BUTTON (button_data->button), FALSE);
1509
1510   switch (button_data->type)
1511     {
1512     case ROOT_BUTTON:
1513       button_data->image = gtk_image_new ();
1514       child = button_data->image;
1515       button_data->label = NULL;
1516       atk_object_set_name (atk_obj, _("File System Root"));
1517       break;
1518     case HOME_BUTTON:
1519     case DESKTOP_BUTTON:
1520       button_data->image = gtk_image_new ();
1521       button_data->label = gtk_label_new (NULL);
1522       child = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
1523       gtk_box_pack_start (GTK_BOX (child), button_data->image, FALSE, FALSE, 0);
1524       gtk_box_pack_start (GTK_BOX (child), button_data->label, FALSE, FALSE, 0);
1525       break;
1526     case NORMAL_BUTTON:
1527     default:
1528       button_data->label = gtk_label_new (NULL);
1529       gtk_label_set_ellipsize (GTK_LABEL (button_data->label), PANGO_ELLIPSIZE_END);
1530       child = button_data->label;
1531       button_data->image = NULL;
1532     }
1533
1534   button_data->dir_name = g_strdup (dir_name);
1535   button_data->file = g_object_ref (file);
1536   button_data->file_is_hidden = file_is_hidden;
1537
1538   /*
1539    * The following function ensures that the alignment will always
1540    * request the same size whether the button's text is bold or not.
1541    */
1542   if (button_data->label)
1543     set_label_size_request (button_data->label, button_data);
1544
1545   gtk_container_add (GTK_CONTAINER (button_data->button), child);
1546   gtk_widget_show_all (button_data->button);
1547
1548   gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1549
1550   g_signal_connect (button_data->button, "clicked",
1551                     G_CALLBACK (button_clicked_cb),
1552                     button_data);
1553   g_object_weak_ref (G_OBJECT (button_data->button),
1554                      (GWeakNotify) button_data_free, button_data);
1555
1556   gtk_drag_source_set (button_data->button,
1557                        GDK_BUTTON1_MASK,
1558                        NULL, 0,
1559                        GDK_ACTION_COPY);
1560   gtk_drag_source_add_uri_targets (button_data->button);
1561   g_signal_connect (button_data->button, "drag-data-get",
1562                     G_CALLBACK (button_drag_data_get_cb), button_data);
1563
1564   return button_data;
1565 }
1566
1567 static gboolean
1568 gtk_path_bar_check_parent_path (GtkPathBar         *path_bar,
1569                                 GFile              *file,
1570                                 GtkFileSystem      *file_system)
1571 {
1572   GList *list;
1573   GList *current_path = NULL;
1574   gboolean need_new_fake_root = FALSE;
1575
1576   for (list = path_bar->button_list; list; list = list->next)
1577     {
1578       ButtonData *button_data;
1579
1580       button_data = list->data;
1581       if (g_file_equal (file, button_data->file))
1582         {
1583           current_path = list;
1584           break;
1585         }
1586       if (list == path_bar->fake_root)
1587         need_new_fake_root = TRUE;
1588     }
1589
1590   if (current_path)
1591     {
1592       if (need_new_fake_root)
1593         {
1594           path_bar->fake_root = NULL;
1595           for (list = current_path; list; list = list->next)
1596             {
1597               ButtonData *button_data;
1598
1599               button_data = list->data;
1600               if (BUTTON_IS_FAKE_ROOT (button_data))
1601                 {
1602                   path_bar->fake_root = list;
1603                   break;
1604                 }
1605             }
1606         }
1607
1608       for (list = path_bar->button_list; list; list = list->next)
1609         {
1610           gtk_path_bar_update_button_appearance (path_bar,
1611                                                  BUTTON_DATA (list->data),
1612                                                  (list == current_path) ? TRUE : FALSE);
1613         }
1614
1615       if (!gtk_widget_get_child_visible (BUTTON_DATA (current_path->data)->button))
1616         {
1617           path_bar->first_scrolled_button = current_path;
1618           gtk_widget_queue_resize (GTK_WIDGET (path_bar));
1619         }
1620
1621       return TRUE;
1622     }
1623   return FALSE;
1624 }
1625
1626
1627 struct SetFileInfo
1628 {
1629   GFile *file;
1630   GFile *parent_file;
1631   GtkPathBar *path_bar;
1632   GList *new_buttons;
1633   GList *fake_root;
1634   gboolean first_directory;
1635 };
1636
1637 static void
1638 gtk_path_bar_set_file_finish (struct SetFileInfo *info,
1639                               gboolean            result)
1640 {
1641   if (result)
1642     {
1643       GList *l;
1644
1645       gtk_path_bar_clear_buttons (info->path_bar);
1646       info->path_bar->button_list = g_list_reverse (info->new_buttons);
1647       info->path_bar->fake_root = info->fake_root;
1648
1649       for (l = info->path_bar->button_list; l; l = l->next)
1650         {
1651           GtkWidget *button = BUTTON_DATA (l->data)->button;
1652           gtk_container_add (GTK_CONTAINER (info->path_bar), button);
1653         }
1654     }
1655   else
1656     {
1657       GList *l;
1658
1659       for (l = info->new_buttons; l; l = l->next)
1660         {
1661           ButtonData *button_data;
1662
1663           button_data = BUTTON_DATA (l->data);
1664           gtk_widget_destroy (button_data->button);
1665         }
1666
1667       g_list_free (info->new_buttons);
1668     }
1669
1670   if (info->file)
1671     g_object_unref (info->file);
1672   if (info->parent_file)
1673     g_object_unref (info->parent_file);
1674   g_free (info);
1675 }
1676
1677 static void
1678 gtk_path_bar_get_info_callback (GCancellable *cancellable,
1679                                 GFileInfo    *info,
1680                                 const GError *error,
1681                                 gpointer      data)
1682 {
1683   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1684   struct SetFileInfo *file_info = data;
1685   ButtonData *button_data;
1686   const gchar *display_name;
1687   gboolean is_hidden;
1688
1689   if (cancellable != file_info->path_bar->get_info_cancellable)
1690     {
1691       gtk_path_bar_set_file_finish (file_info, FALSE);
1692       g_object_unref (cancellable);
1693       return;
1694     }
1695
1696   g_object_unref (cancellable);
1697   file_info->path_bar->get_info_cancellable = NULL;
1698
1699   if (cancelled || !info)
1700     {
1701       gtk_path_bar_set_file_finish (file_info, FALSE);
1702       return;
1703     }
1704
1705   display_name = g_file_info_get_display_name (info);
1706   is_hidden = g_file_info_get_is_hidden (info) || g_file_info_get_is_backup (info);
1707
1708   gtk_widget_push_composite_child ();
1709   button_data = make_directory_button (file_info->path_bar, display_name,
1710                                        file_info->file,
1711                                        file_info->first_directory, is_hidden);
1712   gtk_widget_pop_composite_child ();
1713   g_object_unref (file_info->file);
1714
1715   file_info->new_buttons = g_list_prepend (file_info->new_buttons, button_data);
1716
1717   if (BUTTON_IS_FAKE_ROOT (button_data))
1718     file_info->fake_root = file_info->new_buttons;
1719
1720   file_info->file = file_info->parent_file;
1721   file_info->first_directory = FALSE;
1722
1723   if (!file_info->file)
1724     {
1725       gtk_path_bar_set_file_finish (file_info, TRUE);
1726       return;
1727     }
1728
1729   file_info->parent_file = g_file_get_parent (file_info->file);
1730
1731   file_info->path_bar->get_info_cancellable =
1732     _gtk_file_system_get_info (file_info->path_bar->file_system,
1733                                file_info->file,
1734                                "standard::display-name,standard::is-hidden,standard::is-backup",
1735                                gtk_path_bar_get_info_callback,
1736                                file_info);
1737 }
1738
1739 gboolean
1740 _gtk_path_bar_set_file (GtkPathBar      *path_bar,
1741                         GFile           *file,
1742                         const gboolean   keep_trail,
1743                         GError         **error)
1744 {
1745   struct SetFileInfo *info;
1746
1747   g_return_val_if_fail (GTK_IS_PATH_BAR (path_bar), FALSE);
1748   g_return_val_if_fail (G_IS_FILE (file), FALSE);
1749
1750   /* Check whether the new path is already present in the pathbar as buttons.
1751    * This could be a parent directory or a previous selected subdirectory.
1752    */
1753   if (keep_trail &&
1754       gtk_path_bar_check_parent_path (path_bar, file, path_bar->file_system))
1755     return TRUE;
1756
1757   info = g_new0 (struct SetFileInfo, 1);
1758   info->file = g_object_ref (file);
1759   info->path_bar = path_bar;
1760   info->first_directory = TRUE;
1761   info->parent_file = g_file_get_parent (info->file);
1762
1763   if (path_bar->get_info_cancellable)
1764     g_cancellable_cancel (path_bar->get_info_cancellable);
1765
1766   path_bar->get_info_cancellable =
1767     _gtk_file_system_get_info (path_bar->file_system,
1768                                info->file,
1769                                "standard::display-name,standard::is-hidden,standard::is-backup",
1770                                gtk_path_bar_get_info_callback,
1771                                info);
1772
1773   return TRUE;
1774 }
1775
1776 /* FIXME: This should be a construct-only property */
1777 void
1778 _gtk_path_bar_set_file_system (GtkPathBar    *path_bar,
1779                                GtkFileSystem *file_system)
1780 {
1781   const char *home;
1782
1783   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1784
1785   g_assert (path_bar->file_system == NULL);
1786
1787   path_bar->file_system = g_object_ref (file_system);
1788
1789   home = g_get_home_dir ();
1790   if (home != NULL)
1791     {
1792       const gchar *desktop;
1793
1794       path_bar->home_file = g_file_new_for_path (home);
1795       /* FIXME: Need file system backend specific way of getting the
1796        * Desktop path.
1797        */
1798       desktop = g_get_user_special_dir (G_USER_DIRECTORY_DESKTOP);
1799       if (desktop != NULL)
1800         path_bar->desktop_file = g_file_new_for_path (desktop);
1801       else
1802         path_bar->desktop_file = NULL;
1803     }
1804   else
1805     {
1806       path_bar->home_file = NULL;
1807       path_bar->desktop_file = NULL;
1808     }
1809   path_bar->root_file = g_file_new_for_path ("/");
1810 }
1811
1812 /**
1813  * _gtk_path_bar_up:
1814  * @path_bar: a #GtkPathBar
1815  *
1816  * If the selected button in the pathbar is not the furthest button "up" (in the
1817  * root direction), act as if the user clicked on the next button up.
1818  **/
1819 void
1820 _gtk_path_bar_up (GtkPathBar *path_bar)
1821 {
1822   GList *l;
1823
1824   for (l = path_bar->button_list; l; l = l->next)
1825     {
1826       GtkWidget *button = BUTTON_DATA (l->data)->button;
1827       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1828         {
1829           if (l->next)
1830             {
1831               GtkWidget *next_button = BUTTON_DATA (l->next->data)->button;
1832               button_clicked_cb (next_button, l->next->data);
1833             }
1834           break;
1835         }
1836     }
1837 }
1838
1839 /**
1840  * _gtk_path_bar_down:
1841  * @path_bar: a #GtkPathBar
1842  *
1843  * If the selected button in the pathbar is not the furthest button "down" (in the
1844  * leaf direction), act as if the user clicked on the next button down.
1845  **/
1846 void
1847 _gtk_path_bar_down (GtkPathBar *path_bar)
1848 {
1849   GList *l;
1850
1851   for (l = path_bar->button_list; l; l = l->next)
1852     {
1853       GtkWidget *button = BUTTON_DATA (l->data)->button;
1854       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1855         {
1856           if (l->prev)
1857             {
1858               GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button;
1859               button_clicked_cb (prev_button, l->prev->data);
1860             }
1861           break;
1862         }
1863     }
1864 }