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, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "config.h"
  20
  21 #include "gtkpathbar.h"
  22
  23 #include <string.h>
  24
  25 #include "gtkarrow.h"
  26 #include "gtkbox.h"
  27 #include "gtkdnd.h"
  28 #include "gtkiconfactory.h"
  29 #include "gtkicontheme.h"
  30 #include "gtkimage.h"
  31 #include "gtkintl.h"
  32 #include "gtklabel.h"
  33 #include "gtkmain.h"
  34 #include "gtkmarshalers.h"
  35 #include "gtksettings.h"
  36 #include "gtktogglebutton.h"
  37 #include "gtkwidgetpath.h"
  38 #include "gtkwidgetprivate.h"
  39
  40
  41 enum {
  42   PATH_CLICKED,
  43   LAST_SIGNAL
  44 };
  45
  46 typedef enum {
  47   NORMAL_BUTTON,
  48   ROOT_BUTTON,
  49   HOME_BUTTON,
  50   DESKTOP_BUTTON
  51 } ButtonType;
  52
  53 #define BUTTON_DATA(x) ((ButtonData *)(x))
  54
  55 #define SCROLL_DELAY_FACTOR 5
  56
  57 static guint path_bar_signals [LAST_SIGNAL] = { 0 };
  58
  59 /* Icon size for if we can't get it from the theme */
  60 #define FALLBACK_ICON_SIZE 16
  61
  62 typedef struct _ButtonData ButtonData;
  63
  64 struct _ButtonData
  65 {
  66   GtkWidget *button;
  67   ButtonType type;
  68   char *dir_name;
  69   GFile *file;
  70   GtkWidget *image;
  71   GtkWidget *label;
  72   GCancellable *cancellable;
  73   guint ignore_changes : 1;
  74   guint file_is_hidden : 1;
  75 };
  76 /* This macro is used to check if a button can be used as a fake root.
  77  * All buttons in front of a fake root are automatically hidden when in a
  78  * directory below a fake root and replaced with the "<" arrow button.
  79  */
  80 #define BUTTON_IS_FAKE_ROOT(button) ((button)->type == HOME_BUTTON)
  81
  82 G_DEFINE_TYPE (GtkPathBar, gtk_path_bar, GTK_TYPE_CONTAINER)
  83
  84 static void gtk_path_bar_finalize                 (GObject          *object);
  85 static void gtk_path_bar_dispose                  (GObject          *object);
  86 static void gtk_path_bar_realize                  (GtkWidget        *widget);
  87 static void gtk_path_bar_unrealize                (GtkWidget        *widget);
  88 static void gtk_path_bar_get_preferred_width      (GtkWidget        *widget,
  89                                                    gint             *minimum,
  90                                                    gint             *natural);
  91 static void gtk_path_bar_get_preferred_height     (GtkWidget        *widget,
  92                                                    gint             *minimum,
  93                                                    gint             *natural);
  94 static void gtk_path_bar_map                      (GtkWidget        *widget);
  95 static void gtk_path_bar_unmap                    (GtkWidget        *widget);
  96 static void gtk_path_bar_size_allocate            (GtkWidget        *widget,
  97                                                    GtkAllocation    *allocation);
  98 static void gtk_path_bar_add                      (GtkContainer     *container,
  99                                                    GtkWidget        *widget);
 100 static void gtk_path_bar_remove                   (GtkContainer     *container,
 101                                                    GtkWidget        *widget);
 102 static void gtk_path_bar_forall                   (GtkContainer     *container,
 103                                                    gboolean          include_internals,
 104                                                    GtkCallback       callback,
 105                                                    gpointer          callback_data);
 106 static GtkWidgetPath *gtk_path_bar_get_path_for_child (GtkContainer *container,
 107                                                        GtkWidget    *child);
 108 static gboolean gtk_path_bar_scroll               (GtkWidget        *widget,
 109                                                    GdkEventScroll   *event);
 110 static void gtk_path_bar_scroll_up                (GtkPathBar       *path_bar);
 111 static void gtk_path_bar_scroll_down              (GtkPathBar       *path_bar);
 112 static void gtk_path_bar_stop_scrolling           (GtkPathBar       *path_bar);
 113 static gboolean gtk_path_bar_slider_up_defocus    (GtkWidget        *widget,
 114                                                    GdkEventButton   *event,
 115                                                    GtkPathBar       *path_bar);
 116 static gboolean gtk_path_bar_slider_down_defocus  (GtkWidget        *widget,
 117                                                    GdkEventButton   *event,
 118                                                    GtkPathBar       *path_bar);
 119 static gboolean gtk_path_bar_slider_button_press  (GtkWidget        *widget,
 120                                                    GdkEventButton   *event,
 121                                                    GtkPathBar       *path_bar);
 122 static gboolean gtk_path_bar_slider_button_release(GtkWidget        *widget,
 123                                                    GdkEventButton   *event,
 124                                                    GtkPathBar       *path_bar);
 125 static void gtk_path_bar_grab_notify              (GtkWidget        *widget,
 126                                                    gboolean          was_grabbed);
 127 static void gtk_path_bar_state_changed            (GtkWidget        *widget,
 128                                                    GtkStateType      previous_state);
 129 static void gtk_path_bar_style_updated            (GtkWidget        *widget);
 130 static void gtk_path_bar_screen_changed           (GtkWidget        *widget,
 131                                                    GdkScreen        *previous_screen);
 132 static void gtk_path_bar_check_icon_theme         (GtkPathBar       *path_bar);
 133 static void gtk_path_bar_update_button_appearance (GtkPathBar       *path_bar,
 134                                                    ButtonData       *button_data,
 135                                                    gboolean          current_dir);
 136
 137 static void
 138 on_slider_unmap (GtkWidget  *widget,
 139                  GtkPathBar *path_bar)
 140 {
 141   if (path_bar->timer &&
 142       ((widget == path_bar->up_slider_button && path_bar->scrolling_up) ||
 143        (widget == path_bar->down_slider_button && path_bar->scrolling_down)))
 144     gtk_path_bar_stop_scrolling (path_bar);
 145 }
 146
 147 static GtkWidget *
 148 get_slider_button (GtkPathBar  *path_bar,
 149                    GtkArrowType arrow_type)
 150 {
 151   GtkWidget *button;
 152   AtkObject *atk_obj;
 153
 154   gtk_widget_push_composite_child ();
 155
 156   button = gtk_button_new ();
 157   atk_obj = gtk_widget_get_accessible (button);
 158   if (arrow_type == GTK_ARROW_LEFT)
 159     atk_object_set_name (atk_obj, _("Up Path"));
 160   else
 161     atk_object_set_name (atk_obj, _("Down Path"));
 162
 163   gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE);
 164   gtk_widget_add_events (button, GDK_SCROLL_MASK);
 165   gtk_container_add (GTK_CONTAINER (button),
 166                      gtk_arrow_new (arrow_type, GTK_SHADOW_OUT));
 167   gtk_container_add (GTK_CONTAINER (path_bar), button);
 168   gtk_widget_show_all (button);
 169
 170   g_signal_connect (G_OBJECT (button), "unmap",
 171                     G_CALLBACK (on_slider_unmap), path_bar);
 172
 173   gtk_widget_pop_composite_child ();
 174
 175   return button;
 176 }
 177
 178 static void
 179 gtk_path_bar_init (GtkPathBar *path_bar)
 180 {
 181   GtkStyleContext *context;
 182
 183   gtk_widget_set_has_window (GTK_WIDGET (path_bar), FALSE);
 184   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (path_bar), FALSE);
 185
 186   path_bar->get_info_cancellable = NULL;
 187
 188   path_bar->spacing = 0;
 189   path_bar->up_slider_button = get_slider_button (path_bar, GTK_ARROW_LEFT);
 190   path_bar->down_slider_button = get_slider_button (path_bar, GTK_ARROW_RIGHT);
 191   path_bar->icon_size = FALLBACK_ICON_SIZE;
 192
 193   g_signal_connect_swapped (path_bar->up_slider_button, "clicked",
 194                             G_CALLBACK (gtk_path_bar_scroll_up), path_bar);
 195   g_signal_connect_swapped (path_bar->down_slider_button, "clicked",
 196                             G_CALLBACK (gtk_path_bar_scroll_down), path_bar);
 197
 198   g_signal_connect (path_bar->up_slider_button, "focus-out-event",
 199                     G_CALLBACK (gtk_path_bar_slider_up_defocus), path_bar);
 200   g_signal_connect (path_bar->down_slider_button, "focus-out-event",
 201                     G_CALLBACK (gtk_path_bar_slider_down_defocus), path_bar);
 202
 203   g_signal_connect (path_bar->up_slider_button, "button-press-event",
 204                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 205   g_signal_connect (path_bar->up_slider_button, "button-release-event",
 206                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 207   g_signal_connect (path_bar->down_slider_button, "button-press-event",
 208                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 209   g_signal_connect (path_bar->down_slider_button, "button-release-event",
 210                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 211
 212   context = gtk_widget_get_style_context (GTK_WIDGET (path_bar));
 213   gtk_style_context_add_class (context, GTK_STYLE_CLASS_LINKED);
 214 }
 215
 216 static void
 217 gtk_path_bar_class_init (GtkPathBarClass *path_bar_class)
 218 {
 219   GObjectClass *gobject_class;
 220   GtkWidgetClass *widget_class;
 221   GtkContainerClass *container_class;
 222
 223   gobject_class = (GObjectClass *) path_bar_class;
 224   widget_class = (GtkWidgetClass *) path_bar_class;
 225   container_class = (GtkContainerClass *) path_bar_class;
 226
 227   gobject_class->finalize = gtk_path_bar_finalize;
 228   gobject_class->dispose = gtk_path_bar_dispose;
 229
 230   widget_class->get_preferred_width = gtk_path_bar_get_preferred_width;
 231   widget_class->get_preferred_height = gtk_path_bar_get_preferred_height;
 232   widget_class->realize = gtk_path_bar_realize;
 233   widget_class->unrealize = gtk_path_bar_unrealize;
 234   widget_class->map = gtk_path_bar_map;
 235   widget_class->unmap = gtk_path_bar_unmap;
 236   widget_class->size_allocate = gtk_path_bar_size_allocate;
 237   widget_class->style_updated = gtk_path_bar_style_updated;
 238   widget_class->screen_changed = gtk_path_bar_screen_changed;
 239   widget_class->grab_notify = gtk_path_bar_grab_notify;
 240   widget_class->state_changed = gtk_path_bar_state_changed;
 241   widget_class->scroll_event = gtk_path_bar_scroll;
 242
 243   container_class->add = gtk_path_bar_add;
 244   container_class->forall = gtk_path_bar_forall;
 245   container_class->remove = gtk_path_bar_remove;
 246   container_class->get_path_for_child = gtk_path_bar_get_path_for_child;
 247   gtk_container_class_handle_border_width (container_class);
 248   /* FIXME: */
 249   /*  container_class->child_type = gtk_path_bar_child_type;*/
 250
 251   path_bar_signals [PATH_CLICKED] =
 252     g_signal_new (I_("path-clicked"),
 253                   G_OBJECT_CLASS_TYPE (gobject_class),
 254                   G_SIGNAL_RUN_FIRST,
 255                   G_STRUCT_OFFSET (GtkPathBarClass, path_clicked),
 256                   NULL, NULL,
 257                   _gtk_marshal_VOID__POINTER_POINTER_BOOLEAN,
 258                   G_TYPE_NONE, 3,
 259                   G_TYPE_POINTER,
 260                   G_TYPE_POINTER,
 261                   G_TYPE_BOOLEAN);
 262 }
 263
 264
 265 static void
 266 gtk_path_bar_finalize (GObject *object)
 267 {
 268   GtkPathBar *path_bar;
 269
 270   path_bar = GTK_PATH_BAR (object);
 271
 272   gtk_path_bar_stop_scrolling (path_bar);
 273
 274   g_list_free (path_bar->button_list);
 275   if (path_bar->root_file)
 276     g_object_unref (path_bar->root_file);
 277   if (path_bar->home_file)
 278     g_object_unref (path_bar->home_file);
 279   if (path_bar->desktop_file)
 280     g_object_unref (path_bar->desktop_file);
 281
 282   if (path_bar->root_icon)
 283     g_object_unref (path_bar->root_icon);
 284   if (path_bar->home_icon)
 285     g_object_unref (path_bar->home_icon);
 286   if (path_bar->desktop_icon)
 287     g_object_unref (path_bar->desktop_icon);
 288
 289   if (path_bar->file_system)
 290     g_object_unref (path_bar->file_system);
 291
 292   G_OBJECT_CLASS (gtk_path_bar_parent_class)->finalize (object);
 293 }
 294
 295 /* Removes the settings signal handler.  It's safe to call multiple times */
 296 static void
 297 remove_settings_signal (GtkPathBar *path_bar,
 298                         GdkScreen  *screen)
 299 {
 300   if (path_bar->settings_signal_id)
 301     {
 302       GtkSettings *settings;
 303
 304       settings = gtk_settings_get_for_screen (screen);
 305       g_signal_handler_disconnect (settings,
 306                                    path_bar->settings_signal_id);
 307       path_bar->settings_signal_id = 0;
 308     }
 309 }
 310
 311 static void
 312 gtk_path_bar_dispose (GObject *object)
 313 {
 314   GtkPathBar *path_bar = GTK_PATH_BAR (object);
 315
 316   remove_settings_signal (path_bar, gtk_widget_get_screen (GTK_WIDGET (object)));
 317
 318   if (path_bar->get_info_cancellable)
 319     g_cancellable_cancel (path_bar->get_info_cancellable);
 320   path_bar->get_info_cancellable = NULL;
 321
 322   G_OBJECT_CLASS (gtk_path_bar_parent_class)->dispose (object);
 323 }
 324
 325 /* Size requisition:
 326  *
 327  * Ideally, our size is determined by another widget, and we are just filling
 328  * available space.
 329  */
 330 static void
 331 gtk_path_bar_get_preferred_width (GtkWidget *widget,
 332                                   gint      *minimum,
 333                                   gint      *natural)
 334 {
 335   ButtonData *button_data;
 336   GtkPathBar *path_bar;
 337   GList *list;
 338   gint child_height;
 339   gint height;
 340   gint child_min, child_nat;
 341
 342   path_bar = GTK_PATH_BAR (widget);
 343
 344   *minimum = *natural = 0;
 345   height = 0;
 346
 347   for (list = path_bar->button_list; list; list = list->next)
 348     {
 349       button_data = BUTTON_DATA (list->data);
 350       gtk_widget_get_preferred_width (button_data->button, &child_min, &child_nat);
 351       gtk_widget_get_preferred_height (button_data->button, &child_height, NULL);
 352       height = MAX (height, child_height);
 353
 354       if (button_data->type == NORMAL_BUTTON)
 355         {
 356           /* Use 2*Height as button width because of ellipsized label.  */
 357           child_min = MAX (child_min, child_height * 2);
 358           child_nat = MAX (child_min, child_height * 2);
 359         }
 360
 361       *minimum = MAX (*minimum, child_min);
 362       *natural = MAX (*natural, child_nat);
 363     }
 364
 365   /* Add space for slider, if we have more than one path */
 366   /* Theoretically, the slider could be bigger than the other button.  But we're
 367    * not going to worry about that now.
 368    */
 369   path_bar->slider_width = MIN (height * 2 / 3 + 5, height);
 370   if (path_bar->button_list && path_bar->button_list->next != NULL)
 371     {
 372       *minimum += (path_bar->spacing + path_bar->slider_width) * 2;
 373       *natural += (path_bar->spacing + path_bar->slider_width) * 2;
 374     }
 375 }
 376
 377 static void
 378 gtk_path_bar_get_preferred_height (GtkWidget *widget,
 379                                    gint      *minimum,
 380                                    gint      *natural)
 381 {
 382   ButtonData *button_data;
 383   GtkPathBar *path_bar;
 384   GList *list;
 385   gint child_min, child_nat;
 386
 387   path_bar = GTK_PATH_BAR (widget);
 388
 389   *minimum = *natural = 0;
 390
 391   for (list = path_bar->button_list; list; list = list->next)
 392     {
 393       button_data = BUTTON_DATA (list->data);
 394       gtk_widget_get_preferred_height (button_data->button, &child_min, &child_nat);
 395
 396       *minimum = MAX (*minimum, child_min);
 397       *natural = MAX (*natural, child_nat);
 398     }
 399 }
 400
 401 static void
 402 gtk_path_bar_update_slider_buttons (GtkPathBar *path_bar)
 403 {
 404   if (path_bar->button_list)
 405     {
 406       GtkWidget *button;
 407
 408       button = BUTTON_DATA (path_bar->button_list->data)->button;
 409       if (gtk_widget_get_child_visible (button))
 410         {
 411           gtk_path_bar_stop_scrolling (path_bar);
 412           gtk_widget_set_sensitive (path_bar->down_slider_button, FALSE);
 413         }
 414       else
 415         gtk_widget_set_sensitive (path_bar->down_slider_button, TRUE);
 416
 417       button = BUTTON_DATA (g_list_last (path_bar->button_list)->data)->button;
 418       if (gtk_widget_get_child_visible (button))
 419         {
 420           gtk_path_bar_stop_scrolling (path_bar);
 421           gtk_widget_set_sensitive (path_bar->up_slider_button, FALSE);
 422         }
 423       else
 424         gtk_widget_set_sensitive (path_bar->up_slider_button, TRUE);
 425     }
 426 }
 427
 428 static void
 429 gtk_path_bar_map (GtkWidget *widget)
 430 {
 431   gdk_window_show (GTK_PATH_BAR (widget)->event_window);
 432
 433   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->map (widget);
 434 }
 435
 436 static void
 437 gtk_path_bar_unmap (GtkWidget *widget)
 438 {
 439   gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 440   gdk_window_hide (GTK_PATH_BAR (widget)->event_window);
 441
 442   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unmap (widget);
 443 }
 444
 445 static void
 446 gtk_path_bar_realize (GtkWidget *widget)
 447 {
 448   GtkPathBar *path_bar;
 449   GtkAllocation allocation;
 450   GdkWindow *window;
 451   GdkWindowAttr attributes;
 452   gint attributes_mask;
 453
 454   gtk_widget_set_realized (widget, TRUE);
 455
 456   path_bar = GTK_PATH_BAR (widget);
 457   window = gtk_widget_get_parent_window (widget);
 458   gtk_widget_set_window (widget, window);
 459   g_object_ref (window);
 460
 461   gtk_widget_get_allocation (widget, &allocation);
 462
 463   attributes.window_type = GDK_WINDOW_CHILD;
 464   attributes.x = allocation.x;
 465   attributes.y = allocation.y;
 466   attributes.width = allocation.width;
 467   attributes.height = allocation.height;
 468   attributes.wclass = GDK_INPUT_ONLY;
 469   attributes.event_mask = gtk_widget_get_events (widget);
 470   attributes.event_mask |= GDK_SCROLL_MASK;
 471   attributes_mask = GDK_WA_X | GDK_WA_Y;
 472
 473   path_bar->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
 474                                            &attributes, attributes_mask);
 475   gdk_window_set_user_data (path_bar->event_window, widget);
 476 }
 477
 478 static void
 479 gtk_path_bar_unrealize (GtkWidget *widget)
 480 {
 481   GtkPathBar *path_bar;
 482
 483   path_bar = GTK_PATH_BAR (widget);
 484
 485   gdk_window_set_user_data (path_bar->event_window, NULL);
 486   gdk_window_destroy (path_bar->event_window);
 487   path_bar->event_window = NULL;
 488
 489   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unrealize (widget);
 490 }
 491
 492 static void
 493 child_ordering_changed (GtkPathBar *path_bar)
 494 {
 495   GList *l;
 496
 497   if (path_bar->up_slider_button)
 498     _gtk_widget_invalidate_style_context (path_bar->up_slider_button,
 499                                           GTK_CSS_CHANGE_POSITION | GTK_CSS_CHANGE_SIBLING_POSITION);
 500   if (path_bar->down_slider_button)
 501     _gtk_widget_invalidate_style_context (path_bar->down_slider_button,
 502                                           GTK_CSS_CHANGE_POSITION | GTK_CSS_CHANGE_SIBLING_POSITION);
 503
 504   for (l = path_bar->button_list; l; l = l->next)
 505     {
 506       ButtonData *data = l->data;
 507
 508       _gtk_widget_invalidate_style_context (data->button,
 509                                             GTK_CSS_CHANGE_POSITION | GTK_CSS_CHANGE_SIBLING_POSITION);
 510     }
 511 }
 512
 513 /* This is a tad complicated
 514  */
 515 static void
 516 gtk_path_bar_size_allocate (GtkWidget     *widget,
 517                             GtkAllocation *allocation)
 518 {
 519   GtkWidget *child;
 520   GtkPathBar *path_bar = GTK_PATH_BAR (widget);
 521   GtkTextDirection direction;
 522   GtkAllocation child_allocation;
 523   GList *list, *first_button;
 524   gint width;
 525   gint allocation_width;
 526   gboolean need_sliders = FALSE;
 527   gint up_slider_offset = 0;
 528   GtkRequisition child_requisition;
 529   gboolean needs_reorder = FALSE;
 530
 531   gtk_widget_set_allocation (widget, allocation);
 532
 533   if (gtk_widget_get_realized (widget))
 534     gdk_window_move_resize (path_bar->event_window,
 535                             allocation->x, allocation->y,
 536                             allocation->width, allocation->height);
 537
 538   /* No path is set; we don't have to allocate anything. */
 539   if (path_bar->button_list == NULL)
 540     return;
 541
 542   direction = gtk_widget_get_direction (widget);
 543   allocation_width = allocation->width;
 544
 545   /* First, we check to see if we need the scrollbars. */
 546   if (path_bar->fake_root)
 547     width = path_bar->spacing + path_bar->slider_width;
 548   else
 549     width = 0;
 550
 551   for (list = path_bar->button_list; list; list = list->next)
 552     {
 553       child = BUTTON_DATA (list->data)->button;
 554
 555       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 556
 557       width += child_requisition.width + path_bar->spacing;
 558       if (list == path_bar->fake_root)
 559         break;
 560     }
 561
 562   if (width <= allocation_width)
 563     {
 564       if (path_bar->fake_root)
 565         first_button = path_bar->fake_root;
 566       else
 567         first_button = g_list_last (path_bar->button_list);
 568     }
 569   else
 570     {
 571       gboolean reached_end = FALSE;
 572       gint slider_space = 2 * (path_bar->spacing + path_bar->slider_width);
 573
 574       if (path_bar->first_scrolled_button)
 575         first_button = path_bar->first_scrolled_button;
 576       else
 577         first_button = path_bar->button_list;
 578       need_sliders = TRUE;
 579
 580       /* To see how much space we have, and how many buttons we can display.
 581        * We start at the first button, count forward until hit the new
 582        * button, then count backwards.
 583        */
 584       /* Count down the path chain towards the end. */
 585       gtk_widget_get_preferred_size (BUTTON_DATA (first_button->data)->button,
 586                                      &child_requisition, NULL);
 587
 588       width = child_requisition.width;
 589       list = first_button->prev;
 590       while (list && !reached_end)
 591         {
 592           child = BUTTON_DATA (list->data)->button;
 593
 594           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 595
 596           if (width + child_requisition.width +
 597               path_bar->spacing + slider_space > allocation_width)
 598             reached_end = TRUE;
 599           else if (list == path_bar->fake_root)
 600             break;
 601           else
 602             width += child_requisition.width + path_bar->spacing;
 603
 604           list = list->prev;
 605         }
 606
 607       /* Finally, we walk up, seeing how many of the previous buttons we can
 608        * add */
 609       while (first_button->next && !reached_end)
 610         {
 611           child = BUTTON_DATA (first_button->next->data)->button;
 612
 613           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 614
 615           if (width + child_requisition.width + path_bar->spacing + slider_space > allocation_width)
 616             {
 617               reached_end = TRUE;
 618             }
 619           else
 620             {
 621               width += child_requisition.width + path_bar->spacing;
 622               if (first_button == path_bar->fake_root)
 623                 break;
 624               first_button = first_button->next;
 625             }
 626         }
 627     }
 628
 629   /* Now, we allocate space to the buttons */
 630   child_allocation.y = allocation->y;
 631   child_allocation.height = allocation->height;
 632
 633   if (direction == GTK_TEXT_DIR_RTL)
 634     {
 635       child_allocation.x = allocation->x + allocation->width;
 636       if (need_sliders || path_bar->fake_root)
 637         {
 638           child_allocation.x -= (path_bar->spacing + path_bar->slider_width);
 639           up_slider_offset = allocation->width - path_bar->slider_width;
 640         }
 641     }
 642   else
 643     {
 644       child_allocation.x = allocation->x;
 645       if (need_sliders || path_bar->fake_root)
 646         {
 647           up_slider_offset = 0;
 648           child_allocation.x += (path_bar->spacing + path_bar->slider_width);
 649         }
 650     }
 651
 652   for (list = first_button; list; list = list->prev)
 653     {
 654       GtkAllocation widget_allocation;
 655       ButtonData *button_data;
 656
 657       button_data = BUTTON_DATA (list->data);
 658       child = button_data->button;
 659
 660       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 661
 662       child_allocation.width = MIN (child_requisition.width,
 663                                     allocation_width - (path_bar->spacing + path_bar->slider_width) * 2);
 664
 665       if (direction == GTK_TEXT_DIR_RTL)
 666         child_allocation.x -= child_allocation.width;
 667
 668       /* Check to see if we've don't have any more space to allocate buttons */
 669       if (need_sliders && direction == GTK_TEXT_DIR_RTL)
 670         {
 671           gtk_widget_get_allocation (widget, &widget_allocation);
 672           if (child_allocation.x - path_bar->spacing - path_bar->slider_width < widget_allocation.x)
 673             break;
 674         }
 675       else if (need_sliders && direction == GTK_TEXT_DIR_LTR)
 676         {
 677           gtk_widget_get_allocation (widget, &widget_allocation);
 678           if (child_allocation.x + child_allocation.width + path_bar->spacing + path_bar->slider_width >
 679               widget_allocation.x + allocation_width)
 680             break;
 681         }
 682
 683       if (child_allocation.width < child_requisition.width)
 684         {
 685           if (!gtk_widget_get_has_tooltip (child))
 686             gtk_widget_set_tooltip_text (child, button_data->dir_name);
 687         }
 688       else if (gtk_widget_get_has_tooltip (child))
 689         gtk_widget_set_tooltip_text (child, NULL);
 690
 691       needs_reorder |= gtk_widget_get_child_visible (child) == FALSE;
 692       gtk_widget_set_child_visible (child, TRUE);
 693       gtk_widget_size_allocate (child, &child_allocation);
 694
 695       if (direction == GTK_TEXT_DIR_RTL)
 696         child_allocation.x -= path_bar->spacing;
 697       else
 698         child_allocation.x += child_allocation.width + path_bar->spacing;
 699     }
 700   /* Now we go hide all the widgets that don't fit */
 701   while (list)
 702     {
 703       needs_reorder |= gtk_widget_get_child_visible (child) == TRUE;
 704       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 705       list = list->prev;
 706     }
 707   for (list = first_button->next; list; list = list->next)
 708     {
 709       needs_reorder |= gtk_widget_get_child_visible (child) == TRUE;
 710       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 711     }
 712
 713   if (need_sliders || path_bar->fake_root)
 714     {
 715       child_allocation.width = path_bar->slider_width;
 716       child_allocation.x = up_slider_offset + allocation->x;
 717       gtk_widget_size_allocate (path_bar->up_slider_button, &child_allocation);
 718
 719       needs_reorder |= gtk_widget_get_child_visible (path_bar->up_slider_button) == FALSE;
 720       gtk_widget_set_child_visible (path_bar->up_slider_button, TRUE);
 721       gtk_widget_show_all (path_bar->up_slider_button);
 722     }
 723   else
 724     {
 725       needs_reorder |= gtk_widget_get_child_visible (path_bar->up_slider_button) == TRUE;
 726       gtk_widget_set_child_visible (path_bar->up_slider_button, FALSE);
 727     }
 728
 729   if (need_sliders)
 730     {
 731       child_allocation.width = path_bar->slider_width;
 732
 733       if (direction == GTK_TEXT_DIR_RTL)
 734         child_allocation.x = 0;
 735       else
 736         child_allocation.x = allocation->width - path_bar->slider_width;
 737
 738       child_allocation.x += allocation->x;
 739
 740       gtk_widget_size_allocate (path_bar->down_slider_button, &child_allocation);
 741
 742       needs_reorder |= gtk_widget_get_child_visible (path_bar->down_slider_button) == FALSE;
 743       gtk_widget_set_child_visible (path_bar->down_slider_button, TRUE);
 744       gtk_widget_show_all (path_bar->down_slider_button);
 745       gtk_path_bar_update_slider_buttons (path_bar);
 746     }
 747   else
 748     {
 749       needs_reorder |= gtk_widget_get_child_visible (path_bar->down_slider_button) == TRUE;
 750       gtk_widget_set_child_visible (path_bar->down_slider_button, FALSE);
 751     }
 752
 753   if (needs_reorder)
 754     child_ordering_changed (path_bar);
 755 }
 756
 757 static void
 758 gtk_path_bar_style_updated (GtkWidget *widget)
 759 {
 760   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_updated (widget);
 761
 762   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 763 }
 764
 765 static void
 766 gtk_path_bar_screen_changed (GtkWidget *widget,
 767                              GdkScreen *previous_screen)
 768 {
 769   if (GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed)
 770     GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed (widget, previous_screen);
 771
 772   /* We might nave a new settings, so we remove the old one */
 773   if (previous_screen)
 774     remove_settings_signal (GTK_PATH_BAR (widget), previous_screen);
 775
 776   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 777 }
 778
 779 static gboolean
 780 gtk_path_bar_scroll (GtkWidget      *widget,
 781                      GdkEventScroll *event)
 782 {
 783   switch (event->direction)
 784     {
 785     case GDK_SCROLL_RIGHT:
 786     case GDK_SCROLL_DOWN:
 787       gtk_path_bar_scroll_down (GTK_PATH_BAR (widget));
 788       break;
 789     case GDK_SCROLL_LEFT:
 790     case GDK_SCROLL_UP:
 791       gtk_path_bar_scroll_up (GTK_PATH_BAR (widget));
 792       break;
 793     case GDK_SCROLL_SMOOTH:
 794       break;
 795     }
 796
 797   return TRUE;
 798 }
 799
 800 static void
 801 gtk_path_bar_add (GtkContainer *container,
 802                   GtkWidget    *widget)
 803
 804 {
 805   gtk_widget_set_parent (widget, GTK_WIDGET (container));
 806 }
 807
 808 static void
 809 gtk_path_bar_remove_1 (GtkContainer *container,
 810                        GtkWidget    *widget)
 811 {
 812   gboolean was_visible = gtk_widget_get_visible (widget);
 813   gtk_widget_unparent (widget);
 814   if (was_visible)
 815     gtk_widget_queue_resize (GTK_WIDGET (container));
 816 }
 817
 818 static void
 819 gtk_path_bar_remove (GtkContainer *container,
 820                      GtkWidget    *widget)
 821 {
 822   GtkPathBar *path_bar;
 823   GList *children;
 824
 825   path_bar = GTK_PATH_BAR (container);
 826
 827   if (widget == path_bar->up_slider_button)
 828     {
 829       gtk_path_bar_remove_1 (container, widget);
 830       path_bar->up_slider_button = NULL;
 831       return;
 832     }
 833
 834   if (widget == path_bar->down_slider_button)
 835     {
 836       gtk_path_bar_remove_1 (container, widget);
 837       path_bar->down_slider_button = NULL;
 838       return;
 839     }
 840
 841   children = path_bar->button_list;
 842   while (children)
 843     {
 844       if (widget == BUTTON_DATA (children->data)->button)
 845         {
 846           gtk_path_bar_remove_1 (container, widget);
 847           path_bar->button_list = g_list_remove_link (path_bar->button_list, children);
 848           g_list_free (children);
 849           return;
 850         }
 851
 852       children = children->next;
 853     }
 854 }
 855
 856 static void
 857 gtk_path_bar_forall (GtkContainer *container,
 858                      gboolean      include_internals,
 859                      GtkCallback   callback,
 860                      gpointer      callback_data)
 861 {
 862   GtkPathBar *path_bar;
 863   GList *children;
 864
 865   g_return_if_fail (callback != NULL);
 866   path_bar = GTK_PATH_BAR (container);
 867
 868   children = path_bar->button_list;
 869   while (children)
 870     {
 871       GtkWidget *child;
 872       child = BUTTON_DATA (children->data)->button;
 873       children = children->next;
 874
 875       (* callback) (child, callback_data);
 876     }
 877
 878   if (path_bar->up_slider_button)
 879     (* callback) (path_bar->up_slider_button, callback_data);
 880
 881   if (path_bar->down_slider_button)
 882     (* callback) (path_bar->down_slider_button, callback_data);
 883 }
 884
 885 static GtkWidgetPath *
 886 gtk_path_bar_get_path_for_child (GtkContainer *container,
 887                                  GtkWidget    *child)
 888 {
 889   GtkPathBar *path_bar = GTK_PATH_BAR (container);
 890   GtkWidgetPath *path;
 891
 892   path = _gtk_widget_create_path (GTK_WIDGET (path_bar));
 893
 894   if (gtk_widget_get_visible (child) &&
 895       gtk_widget_get_child_visible (child))
 896     {
 897       GtkWidgetPath *sibling_path;
 898       GList *visible_children;
 899       GList *l;
 900       int pos;
 901
 902       /* 1. Build the list of visible children, in visually left-to-right order
 903        * (i.e. independently of the widget's direction).  Note that our
 904        * button_list is stored in innermost-to-outermost path order!
 905        */
 906
 907       visible_children = NULL;
 908
 909       if (gtk_widget_get_visible (path_bar->down_slider_button) &&
 910           gtk_widget_get_child_visible (path_bar->down_slider_button))
 911         visible_children = g_list_prepend (visible_children, path_bar->down_slider_button);
 912
 913       for (l = path_bar->button_list; l; l = l->next)
 914         {
 915           ButtonData *data = l->data;
 916
 917           if (gtk_widget_get_visible (data->button) &&
 918               gtk_widget_get_child_visible (data->button))
 919             visible_children = g_list_prepend (visible_children, data->button);
 920         }
 921
 922       if (gtk_widget_get_visible (path_bar->up_slider_button) &&
 923           gtk_widget_get_child_visible (path_bar->up_slider_button))
 924         visible_children = g_list_prepend (visible_children, path_bar->up_slider_button);
 925
 926       if (gtk_widget_get_direction (GTK_WIDGET (path_bar)) == GTK_TEXT_DIR_RTL)
 927         visible_children = g_list_reverse (visible_children);
 928
 929       /* 2. Find the index of the child within that list */
 930
 931       pos = 0;
 932
 933       for (l = visible_children; l; l = l->next)
 934         {
 935           GtkWidget *button = l->data;
 936
 937           if (button == child)
 938             break;
 939
 940           pos++;
 941         }
 942
 943       /* 3. Build the path */
 944
 945       sibling_path = gtk_widget_path_new ();
 946
 947       for (l = visible_children; l; l = l->next)
 948         gtk_widget_path_append_for_widget (sibling_path, l->data);
 949
 950       gtk_widget_path_append_with_siblings (path, sibling_path, pos);
 951
 952       g_list_free (visible_children);
 953       gtk_widget_path_unref (sibling_path);
 954     }
 955   else
 956     gtk_widget_path_append_for_widget (path, child);
 957
 958   return path;
 959 }
 960
 961 static void
 962 gtk_path_bar_scroll_down (GtkPathBar *path_bar)
 963 {
 964   GtkAllocation allocation, button_allocation;
 965   GList *list;
 966   GList *down_button = NULL;
 967   gint space_available;
 968
 969   if (path_bar->ignore_click)
 970     {
 971       path_bar->ignore_click = FALSE;
 972       return;
 973     }
 974
 975   if (gtk_widget_get_child_visible (BUTTON_DATA (path_bar->button_list->data)->button))
 976     {
 977       /* Return if the last button is already visible */
 978       return;
 979     }
 980
 981   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 982
 983   /* We find the button at the 'down' end that we have to make
 984    * visible */
 985   for (list = path_bar->button_list; list; list = list->next)
 986     {
 987       if (list->next && gtk_widget_get_child_visible (BUTTON_DATA (list->next->data)->button))
 988         {
 989           down_button = list;
 990           break;
 991         }
 992     }
 993
 994   gtk_widget_get_allocation (GTK_WIDGET (path_bar), &allocation);
 995   gtk_widget_get_allocation (BUTTON_DATA (down_button->data)->button, &button_allocation);
 996
 997   space_available = (allocation.width
 998                      - 2 * path_bar->spacing - 2 * path_bar->slider_width
 999                      - button_allocation.width);
1000   path_bar->first_scrolled_button = down_button;
1001
1002   /* We have space_available free space that's not being used.
1003    * So we walk down from the end, adding buttons until we use all free space.
1004    */
1005   while (space_available > 0)
1006     {
1007       path_bar->first_scrolled_button = down_button;
1008       down_button = down_button->next;
1009       if (!down_button)
1010         break;
1011       space_available -= (button_allocation.width
1012                           + path_bar->spacing);
1013     }
1014 }
1015
1016 static void
1017 gtk_path_bar_scroll_up (GtkPathBar *path_bar)
1018 {
1019   GList *list;
1020
1021   if (path_bar->ignore_click)
1022     {
1023       path_bar->ignore_click = FALSE;
1024       return;
1025     }
1026
1027   list = g_list_last (path_bar->button_list);
1028
1029   if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
1030     {
1031       /* Return if the first button is already visible */
1032       return;
1033     }
1034
1035   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
1036
1037   for ( ; list; list = list->prev)
1038     {
1039       if (list->prev && gtk_widget_get_child_visible (BUTTON_DATA (list->prev->data)->button))
1040         {
1041           if (list->prev == path_bar->fake_root)
1042             path_bar->fake_root = NULL;
1043           path_bar->first_scrolled_button = list;
1044           return;
1045         }
1046     }
1047 }
1048
1049 static gboolean
1050 gtk_path_bar_scroll_timeout (GtkPathBar *path_bar)
1051 {
1052   gboolean retval = FALSE;
1053
1054   if (path_bar->timer)
1055     {
1056       if (path_bar->scrolling_up)
1057         gtk_path_bar_scroll_up (path_bar);
1058       else if (path_bar->scrolling_down)
1059         gtk_path_bar_scroll_down (path_bar);
1060
1061       if (path_bar->need_timer)
1062         {
1063           GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (path_bar));
1064           guint        timeout;
1065
1066           g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
1067
1068           path_bar->need_timer = FALSE;
1069
1070           path_bar->timer = gdk_threads_add_timeout (timeout * SCROLL_DELAY_FACTOR,
1071                                            (GSourceFunc)gtk_path_bar_scroll_timeout,
1072                                            path_bar);
1073         }
1074       else
1075         retval = TRUE;
1076     }
1077
1078   return retval;
1079 }
1080
1081 static void
1082 gtk_path_bar_stop_scrolling (GtkPathBar *path_bar)
1083 {
1084   if (path_bar->timer)
1085     {
1086       g_source_remove (path_bar->timer);
1087       path_bar->timer = 0;
1088       path_bar->need_timer = FALSE;
1089     }
1090 }
1091
1092 static gboolean
1093 gtk_path_bar_slider_up_defocus (GtkWidget      *widget,
1094                                     GdkEventButton *event,
1095                                     GtkPathBar     *path_bar)
1096 {
1097   GList *list;
1098   GList *up_button = NULL;
1099
1100   if (event->type != GDK_FOCUS_CHANGE)
1101     return FALSE;
1102
1103   for (list = g_list_last (path_bar->button_list); list; list = list->prev)
1104     {
1105       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
1106         {
1107           up_button = list;
1108           break;
1109         }
1110     }
1111
1112   /* don't let the focus vanish */
1113   if ((!gtk_widget_is_sensitive (path_bar->up_slider_button)) ||
1114       (!gtk_widget_get_child_visible (path_bar->up_slider_button)))
1115     gtk_widget_grab_focus (BUTTON_DATA (up_button->data)->button);
1116
1117   return FALSE;
1118 }
1119
1120 static gboolean
1121 gtk_path_bar_slider_down_defocus (GtkWidget      *widget,
1122                                     GdkEventButton *event,
1123                                     GtkPathBar     *path_bar)
1124 {
1125   GList *list;
1126   GList *down_button = NULL;
1127
1128   if (event->type != GDK_FOCUS_CHANGE)
1129     return FALSE;
1130
1131   for (list = path_bar->button_list; list; list = list->next)
1132     {
1133       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
1134         {
1135           down_button = list;
1136           break;
1137         }
1138     }
1139
1140   /* don't let the focus vanish */
1141   if ((!gtk_widget_is_sensitive (path_bar->down_slider_button)) ||
1142       (!gtk_widget_get_child_visible (path_bar->down_slider_button)))
1143     gtk_widget_grab_focus (BUTTON_DATA (down_button->data)->button);
1144
1145   return FALSE;
1146 }
1147
1148 static gboolean
1149 gtk_path_bar_slider_button_press (GtkWidget      *widget,
1150                                   GdkEventButton *event,
1151                                   GtkPathBar     *path_bar)
1152 {
1153   if (event->type != GDK_BUTTON_PRESS || event->button != GDK_BUTTON_PRIMARY)
1154     return FALSE;
1155
1156   path_bar->ignore_click = FALSE;
1157
1158   if (widget == path_bar->up_slider_button)
1159     {
1160       path_bar->scrolling_down = FALSE;
1161       path_bar->scrolling_up = TRUE;
1162       gtk_path_bar_scroll_up (path_bar);
1163     }
1164   else if (widget == path_bar->down_slider_button)
1165     {
1166       path_bar->scrolling_up = FALSE;
1167       path_bar->scrolling_down = TRUE;
1168       gtk_path_bar_scroll_down (path_bar);
1169     }
1170
1171   if (!path_bar->timer)
1172     {
1173       GtkSettings *settings = gtk_widget_get_settings (widget);
1174       guint        timeout;
1175
1176       g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
1177
1178       path_bar->need_timer = TRUE;
1179       path_bar->timer = gdk_threads_add_timeout (timeout,
1180                                        (GSourceFunc)gtk_path_bar_scroll_timeout,
1181                                        path_bar);
1182     }
1183
1184   return FALSE;
1185 }
1186
1187 static gboolean
1188 gtk_path_bar_slider_button_release (GtkWidget      *widget,
1189                                     GdkEventButton *event,
1190                                     GtkPathBar     *path_bar)
1191 {
1192   if (event->type != GDK_BUTTON_RELEASE)
1193     return FALSE;
1194
1195   path_bar->ignore_click = TRUE;
1196   gtk_path_bar_stop_scrolling (path_bar);
1197
1198   return FALSE;
1199 }
1200
1201 static void
1202 gtk_path_bar_grab_notify (GtkWidget *widget,
1203                           gboolean   was_grabbed)
1204 {
1205   if (!was_grabbed)
1206     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1207 }
1208
1209 static void
1210 gtk_path_bar_state_changed (GtkWidget    *widget,
1211                             GtkStateType  previous_state)
1212 {
1213   if (!gtk_widget_is_sensitive (widget))
1214     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1215 }
1216
1217
1218 /* Changes the icons wherever it is needed */
1219 static void
1220 reload_icons (GtkPathBar *path_bar)
1221 {
1222   GList *list;
1223
1224   if (path_bar->root_icon)
1225     {
1226       g_object_unref (path_bar->root_icon);
1227       path_bar->root_icon = NULL;
1228     }
1229   if (path_bar->home_icon)
1230     {
1231       g_object_unref (path_bar->home_icon);
1232       path_bar->home_icon = NULL;
1233     }
1234   if (path_bar->desktop_icon)
1235     {
1236       g_object_unref (path_bar->desktop_icon);
1237       path_bar->desktop_icon = NULL;
1238     }
1239
1240   for (list = path_bar->button_list; list; list = list->next)
1241     {
1242       ButtonData *button_data;
1243       gboolean current_dir;
1244
1245       button_data = BUTTON_DATA (list->data);
1246       if (button_data->type != NORMAL_BUTTON)
1247         {
1248           current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button));
1249           gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1250         }
1251     }
1252
1253 }
1254
1255 static void
1256 change_icon_theme (GtkPathBar *path_bar)
1257 {
1258   GtkSettings *settings;
1259   gint width, height;
1260
1261   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1262
1263   if (gtk_icon_size_lookup_for_settings (settings, GTK_ICON_SIZE_MENU, &width, &height))
1264     path_bar->icon_size = MAX (width, height);
1265   else
1266     path_bar->icon_size = FALLBACK_ICON_SIZE;
1267
1268   reload_icons (path_bar);
1269 }
1270 /* Callback used when a GtkSettings value changes */
1271 static void
1272 settings_notify_cb (GObject    *object,
1273                     GParamSpec *pspec,
1274                     GtkPathBar *path_bar)
1275 {
1276   const char *name;
1277
1278   name = g_param_spec_get_name (pspec);
1279
1280   if (! strcmp (name, "gtk-icon-theme-name") ||
1281       ! strcmp (name, "gtk-icon-sizes"))
1282     change_icon_theme (path_bar);
1283 }
1284
1285 static void
1286 gtk_path_bar_check_icon_theme (GtkPathBar *path_bar)
1287 {
1288   GtkSettings *settings;
1289
1290   if (path_bar->settings_signal_id)
1291     return;
1292
1293   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1294   path_bar->settings_signal_id = g_signal_connect (settings, "notify", G_CALLBACK (settings_notify_cb), path_bar);
1295
1296   change_icon_theme (path_bar);
1297 }
1298
1299 /* Public functions and their helpers */
1300 static void
1301 gtk_path_bar_clear_buttons (GtkPathBar *path_bar)
1302 {
1303   while (path_bar->button_list != NULL)
1304     {
1305       gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (path_bar->button_list->data)->button);
1306     }
1307   path_bar->first_scrolled_button = NULL;
1308   path_bar->fake_root = NULL;
1309 }
1310
1311 static void
1312 button_clicked_cb (GtkWidget *button,
1313                    gpointer   data)
1314 {
1315   ButtonData *button_data;
1316   GtkPathBar *path_bar;
1317   GList *button_list;
1318   gboolean child_is_hidden;
1319   GFile *child_file;
1320
1321   button_data = BUTTON_DATA (data);
1322   if (button_data->ignore_changes)
1323     return;
1324
1325   path_bar = GTK_PATH_BAR (gtk_widget_get_parent (button));
1326
1327   button_list = g_list_find (path_bar->button_list, button_data);
1328   g_assert (button_list != NULL);
1329
1330   g_signal_handlers_block_by_func (button,
1331                                    G_CALLBACK (button_clicked_cb), data);
1332   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
1333   g_signal_handlers_unblock_by_func (button,
1334                                      G_CALLBACK (button_clicked_cb), data);
1335
1336   if (button_list->prev)
1337     {
1338       ButtonData *child_data;
1339
1340       child_data = BUTTON_DATA (button_list->prev->data);
1341       child_file = child_data->file;
1342       child_is_hidden = child_data->file_is_hidden;
1343     }
1344   else
1345     {
1346       child_file = NULL;
1347       child_is_hidden = FALSE;
1348     }
1349
1350   g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0,
1351                  button_data->file, child_file, child_is_hidden);
1352 }
1353
1354 struct SetButtonImageData
1355 {
1356   GtkPathBar *path_bar;
1357   ButtonData *button_data;
1358 };
1359
1360 static void
1361 set_button_image_get_info_cb (GCancellable *cancellable,
1362                               GFileInfo    *info,
1363                               const GError *error,
1364                               gpointer      user_data)
1365 {
1366   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1367   GdkPixbuf *pixbuf;
1368   struct SetButtonImageData *data = user_data;
1369
1370   if (cancellable != data->button_data->cancellable)
1371     goto out;
1372
1373   data->button_data->cancellable = NULL;
1374
1375   if (!data->button_data->button)
1376     {
1377       g_free (data->button_data);
1378       goto out;
1379     }
1380
1381   if (cancelled || error)
1382     goto out;
1383
1384   pixbuf = _gtk_file_info_render_icon (info, GTK_WIDGET (data->path_bar),
1385                                        data->path_bar->icon_size);
1386   gtk_image_set_from_pixbuf (GTK_IMAGE (data->button_data->image), pixbuf);
1387
1388   switch (data->button_data->type)
1389     {
1390       case HOME_BUTTON:
1391         if (data->path_bar->home_icon)
1392           g_object_unref (pixbuf);
1393         else
1394           data->path_bar->home_icon = pixbuf;
1395         break;
1396
1397       case DESKTOP_BUTTON:
1398         if (data->path_bar->desktop_icon)
1399           g_object_unref (pixbuf);
1400         else
1401           data->path_bar->desktop_icon = pixbuf;
1402         break;
1403
1404       default:
1405         break;
1406     };
1407
1408 out:
1409   g_free (data);
1410   g_object_unref (cancellable);
1411 }
1412
1413 static void
1414 set_button_image (GtkPathBar *path_bar,
1415                   ButtonData *button_data)
1416 {
1417   GtkFileSystemVolume *volume;
1418   struct SetButtonImageData *data;
1419
1420   switch (button_data->type)
1421     {
1422     case ROOT_BUTTON:
1423
1424       if (path_bar->root_icon != NULL)
1425         {
1426           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1427           break;
1428         }
1429
1430       volume = _gtk_file_system_get_volume_for_file (path_bar->file_system, path_bar->root_file);
1431       if (volume == NULL)
1432         return;
1433
1434       path_bar->root_icon = _gtk_file_system_volume_render_icon (volume,
1435                                                                  GTK_WIDGET (path_bar),
1436                                                                  path_bar->icon_size,
1437                                                                  NULL);
1438       _gtk_file_system_volume_unref (volume);
1439
1440       gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1441       break;
1442
1443     case HOME_BUTTON:
1444       if (path_bar->home_icon != NULL)
1445         {
1446           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->home_icon);
1447           break;
1448         }
1449
1450       data = g_new0 (struct SetButtonImageData, 1);
1451       data->path_bar = path_bar;
1452       data->button_data = button_data;
1453
1454       if (button_data->cancellable)
1455         g_cancellable_cancel (button_data->cancellable);
1456
1457       button_data->cancellable =
1458         _gtk_file_system_get_info (path_bar->file_system,
1459                                    path_bar->home_file,
1460                                    "standard::icon",
1461                                    set_button_image_get_info_cb,
1462                                    data);
1463       break;
1464
1465     case DESKTOP_BUTTON:
1466       if (path_bar->desktop_icon != NULL)
1467         {
1468           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->desktop_icon);
1469           break;
1470         }
1471
1472       data = g_new0 (struct SetButtonImageData, 1);
1473       data->path_bar = path_bar;
1474       data->button_data = button_data;
1475
1476       if (button_data->cancellable)
1477         g_cancellable_cancel (button_data->cancellable);
1478
1479       button_data->cancellable =
1480         _gtk_file_system_get_info (path_bar->file_system,
1481                                    path_bar->desktop_file,
1482                                    "standard::icon",
1483                                    set_button_image_get_info_cb,
1484                                    data);
1485       break;
1486     default:
1487       break;
1488     }
1489 }
1490
1491 static void
1492 button_data_free (ButtonData *button_data)
1493 {
1494   if (button_data->file)
1495     g_object_unref (button_data->file);
1496   button_data->file = NULL;
1497
1498   g_free (button_data->dir_name);
1499   button_data->dir_name = NULL;
1500
1501   button_data->button = NULL;
1502
1503   if (button_data->cancellable)
1504     g_cancellable_cancel (button_data->cancellable);
1505   else
1506     g_free (button_data);
1507 }
1508
1509 static const char *
1510 get_dir_name (ButtonData *button_data)
1511 {
1512   return button_data->dir_name;
1513 }
1514
1515 /* We always want to request the same size for the label, whether
1516  * or not the contents are bold
1517  */
1518 static void
1519 set_label_size_request (GtkWidget  *widget,
1520                         ButtonData *button_data)
1521 {
1522   const gchar *dir_name = get_dir_name (button_data);
1523   PangoLayout *layout = gtk_widget_create_pango_layout (button_data->label, dir_name);
1524   gint width, height, bold_width, bold_height;
1525   gchar *markup;
1526
1527   pango_layout_get_pixel_size (layout, &width, &height);
1528
1529   markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1530   pango_layout_set_markup (layout, markup, -1);
1531   g_free (markup);
1532
1533   pango_layout_get_pixel_size (layout, &bold_width, &bold_height);
1534
1535   gtk_widget_set_size_request (widget,
1536                                MAX (width, bold_width),
1537                                MAX (height, bold_height));
1538   g_object_unref (layout);
1539 }
1540
1541 static void
1542 gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
1543                                        ButtonData *button_data,
1544                                        gboolean    current_dir)
1545 {
1546   const gchar *dir_name = get_dir_name (button_data);
1547
1548   if (button_data->label != NULL)
1549     {
1550       if (current_dir)
1551         {
1552           char *markup;
1553
1554           markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1555           gtk_label_set_markup (GTK_LABEL (button_data->label), markup);
1556           g_free (markup);
1557         }
1558       else
1559         {
1560           gtk_label_set_text (GTK_LABEL (button_data->label), dir_name);
1561         }
1562     }
1563
1564   if (button_data->image != NULL)
1565     {
1566       set_button_image (path_bar, button_data);
1567     }
1568
1569   if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir)
1570     {
1571       button_data->ignore_changes = TRUE;
1572       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir);
1573       button_data->ignore_changes = FALSE;
1574     }
1575 }
1576
1577 static ButtonType
1578 find_button_type (GtkPathBar  *path_bar,
1579                   GFile       *file)
1580 {
1581   if (path_bar->root_file != NULL &&
1582       g_file_equal (file, path_bar->root_file))
1583     return ROOT_BUTTON;
1584   if (path_bar->home_file != NULL &&
1585       g_file_equal (file, path_bar->home_file))
1586     return HOME_BUTTON;
1587   if (path_bar->desktop_file != NULL &&
1588       g_file_equal (file, path_bar->desktop_file))
1589     return DESKTOP_BUTTON;
1590
1591  return NORMAL_BUTTON;
1592 }
1593
1594 static void
1595 button_drag_data_get_cb (GtkWidget        *widget,
1596                          GdkDragContext   *context,
1597                          GtkSelectionData *selection_data,
1598                          guint             info,
1599                          guint             time_,
1600                          gpointer          data)
1601 {
1602   ButtonData *button_data;
1603   char *uris[2];
1604
1605   button_data = data;
1606
1607   uris[0] = g_file_get_uri (button_data->file);
1608   uris[1] = NULL;
1609
1610   gtk_selection_data_set_uris (selection_data, uris);
1611
1612   g_free (uris[0]);
1613 }
1614
1615 static ButtonData *
1616 make_directory_button (GtkPathBar  *path_bar,
1617                        const char  *dir_name,
1618                        GFile       *file,
1619                        gboolean     current_dir,
1620                        gboolean     file_is_hidden)
1621 {
1622   AtkObject *atk_obj;
1623   GtkWidget *child = NULL;
1624   ButtonData *button_data;
1625
1626   file_is_hidden = !! file_is_hidden;
1627   /* Is it a special button? */
1628   button_data = g_new0 (ButtonData, 1);
1629
1630   button_data->type = find_button_type (path_bar, file);
1631   button_data->button = gtk_toggle_button_new ();
1632   atk_obj = gtk_widget_get_accessible (button_data->button);
1633   gtk_button_set_focus_on_click (GTK_BUTTON (button_data->button), FALSE);
1634   gtk_widget_add_events (button_data->button, GDK_SCROLL_MASK);
1635
1636   switch (button_data->type)
1637     {
1638     case ROOT_BUTTON:
1639       button_data->image = gtk_image_new ();
1640       child = button_data->image;
1641       button_data->label = NULL;
1642       atk_object_set_name (atk_obj, _("File System Root"));
1643       break;
1644     case HOME_BUTTON:
1645     case DESKTOP_BUTTON:
1646       button_data->image = gtk_image_new ();
1647       button_data->label = gtk_label_new (NULL);
1648       child = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
1649       gtk_box_pack_start (GTK_BOX (child), button_data->image, FALSE, FALSE, 0);
1650       gtk_box_pack_start (GTK_BOX (child), button_data->label, FALSE, FALSE, 0);
1651       break;
1652     case NORMAL_BUTTON:
1653     default:
1654       button_data->label = gtk_label_new (NULL);
1655       gtk_label_set_ellipsize (GTK_LABEL (button_data->label), PANGO_ELLIPSIZE_END);
1656       child = button_data->label;
1657       button_data->image = NULL;
1658     }
1659
1660   button_data->dir_name = g_strdup (dir_name);
1661   button_data->file = g_object_ref (file);
1662   button_data->file_is_hidden = file_is_hidden;
1663
1664   /*
1665    * The following function ensures that the alignment will always
1666    * request the same size whether the button's text is bold or not.
1667    */
1668   if (button_data->label)
1669     set_label_size_request (button_data->label, button_data);
1670
1671   gtk_container_add (GTK_CONTAINER (button_data->button), child);
1672   gtk_widget_show_all (button_data->button);
1673
1674   gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1675
1676   g_signal_connect (button_data->button, "clicked",
1677                     G_CALLBACK (button_clicked_cb),
1678                     button_data);
1679   g_object_weak_ref (G_OBJECT (button_data->button),
1680                      (GWeakNotify) button_data_free, button_data);
1681
1682   gtk_drag_source_set (button_data->button,
1683                        GDK_BUTTON1_MASK,
1684                        NULL, 0,
1685                        GDK_ACTION_COPY);
1686   gtk_drag_source_add_uri_targets (button_data->button);
1687   g_signal_connect (button_data->button, "drag-data-get",
1688                     G_CALLBACK (button_drag_data_get_cb), button_data);
1689
1690   return button_data;
1691 }
1692
1693 static gboolean
1694 gtk_path_bar_check_parent_path (GtkPathBar         *path_bar,
1695                                 GFile              *file)
1696 {
1697   GList *list;
1698   GList *current_path = NULL;
1699   gboolean need_new_fake_root = FALSE;
1700
1701   for (list = path_bar->button_list; list; list = list->next)
1702     {
1703       ButtonData *button_data;
1704
1705       button_data = list->data;
1706       if (g_file_equal (file, button_data->file))
1707         {
1708           current_path = list;
1709           break;
1710         }
1711       if (list == path_bar->fake_root)
1712         need_new_fake_root = TRUE;
1713     }
1714
1715   if (current_path)
1716     {
1717       if (need_new_fake_root)
1718         {
1719           path_bar->fake_root = NULL;
1720           for (list = current_path; list; list = list->next)
1721             {
1722               ButtonData *button_data;
1723
1724               button_data = list->data;
1725               if (BUTTON_IS_FAKE_ROOT (button_data))
1726                 {
1727                   path_bar->fake_root = list;
1728                   break;
1729                 }
1730             }
1731         }
1732
1733       for (list = path_bar->button_list; list; list = list->next)
1734         {
1735           gtk_path_bar_update_button_appearance (path_bar,
1736                                                  BUTTON_DATA (list->data),
1737                                                  (list == current_path) ? TRUE : FALSE);
1738         }
1739
1740       if (!gtk_widget_get_child_visible (BUTTON_DATA (current_path->data)->button))
1741         {
1742           path_bar->first_scrolled_button = current_path;
1743           gtk_widget_queue_resize (GTK_WIDGET (path_bar));
1744         }
1745
1746       return TRUE;
1747     }
1748   return FALSE;
1749 }
1750
1751
1752 struct SetFileInfo
1753 {
1754   GFile *file;
1755   GFile *parent_file;
1756   GtkPathBar *path_bar;
1757   GList *new_buttons;
1758   GList *fake_root;
1759   gboolean first_directory;
1760 };
1761
1762 static void
1763 gtk_path_bar_set_file_finish (struct SetFileInfo *info,
1764                               gboolean            result)
1765 {
1766   if (result)
1767     {
1768       GList *l;
1769
1770       gtk_path_bar_clear_buttons (info->path_bar);
1771       info->path_bar->button_list = g_list_reverse (info->new_buttons);
1772       info->path_bar->fake_root = info->fake_root;
1773
1774       for (l = info->path_bar->button_list; l; l = l->next)
1775         {
1776           GtkWidget *button = BUTTON_DATA (l->data)->button;
1777           gtk_container_add (GTK_CONTAINER (info->path_bar), button);
1778         }
1779
1780       child_ordering_changed (info->path_bar);
1781     }
1782   else
1783     {
1784       GList *l;
1785
1786       for (l = info->new_buttons; l; l = l->next)
1787         {
1788           ButtonData *button_data;
1789
1790           button_data = BUTTON_DATA (l->data);
1791           gtk_widget_destroy (button_data->button);
1792         }
1793
1794       g_list_free (info->new_buttons);
1795     }
1796
1797   if (info->file)
1798     g_object_unref (info->file);
1799   if (info->parent_file)
1800     g_object_unref (info->parent_file);
1801
1802   g_free (info);
1803 }
1804
1805 static void
1806 gtk_path_bar_get_info_callback (GCancellable *cancellable,
1807                                 GFileInfo    *info,
1808                                 const GError *error,
1809                                 gpointer      data)
1810 {
1811   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1812   struct SetFileInfo *file_info = data;
1813   ButtonData *button_data;
1814   const gchar *display_name;
1815   gboolean is_hidden;
1816
1817   if (cancellable != file_info->path_bar->get_info_cancellable)
1818     {
1819       gtk_path_bar_set_file_finish (file_info, FALSE);
1820       g_object_unref (cancellable);
1821       return;
1822     }
1823
1824   g_object_unref (cancellable);
1825   file_info->path_bar->get_info_cancellable = NULL;
1826
1827   if (cancelled || !info)
1828     {
1829       gtk_path_bar_set_file_finish (file_info, FALSE);
1830       return;
1831     }
1832
1833   display_name = g_file_info_get_display_name (info);
1834   is_hidden = g_file_info_get_is_hidden (info) || g_file_info_get_is_backup (info);
1835
1836   gtk_widget_push_composite_child ();
1837   button_data = make_directory_button (file_info->path_bar, display_name,
1838                                        file_info->file,
1839                                        file_info->first_directory, is_hidden);
1840   gtk_widget_pop_composite_child ();
1841   g_object_unref (file_info->file);
1842
1843   file_info->new_buttons = g_list_prepend (file_info->new_buttons, button_data);
1844
1845   if (BUTTON_IS_FAKE_ROOT (button_data))
1846     file_info->fake_root = file_info->new_buttons;
1847
1848   /* We have assigned the info for the innermost button, i.e. the deepest directory.
1849    * Now, go on to fetch the info for this directory's parent.
1850    */
1851
1852   file_info->file = file_info->parent_file;
1853   file_info->first_directory = FALSE;
1854
1855   if (!file_info->file)
1856     {
1857       /* No parent?  Okay, we are done. */
1858       gtk_path_bar_set_file_finish (file_info, TRUE);
1859       return;
1860     }
1861
1862   file_info->parent_file = g_file_get_parent (file_info->file);
1863
1864   /* Recurse asynchronously */
1865   file_info->path_bar->get_info_cancellable =
1866     _gtk_file_system_get_info (file_info->path_bar->file_system,
1867                                file_info->file,
1868                                "standard::display-name,standard::is-hidden,standard::is-backup",
1869                                gtk_path_bar_get_info_callback,
1870                                file_info);
1871 }
1872
1873 void
1874 _gtk_path_bar_set_file (GtkPathBar      *path_bar,
1875                         GFile           *file,
1876                         const gboolean   keep_trail)
1877 {
1878   struct SetFileInfo *info;
1879
1880   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1881   g_return_if_fail (G_IS_FILE (file));
1882
1883   /* Check whether the new path is already present in the pathbar as buttons.
1884    * This could be a parent directory or a previous selected subdirectory.
1885    */
1886   if (keep_trail && gtk_path_bar_check_parent_path (path_bar, file))
1887     return;
1888
1889   info = g_new0 (struct SetFileInfo, 1);
1890   info->file = g_object_ref (file);
1891   info->path_bar = path_bar;
1892   info->first_directory = TRUE;
1893   info->parent_file = g_file_get_parent (info->file);
1894
1895   if (path_bar->get_info_cancellable)
1896     g_cancellable_cancel (path_bar->get_info_cancellable);
1897
1898   path_bar->get_info_cancellable =
1899     _gtk_file_system_get_info (path_bar->file_system,
1900                                info->file,
1901                                "standard::display-name,standard::is-hidden,standard::is-backup",
1902                                gtk_path_bar_get_info_callback,
1903                                info);
1904 }
1905
1906 /* FIXME: This should be a construct-only property */
1907 void
1908 _gtk_path_bar_set_file_system (GtkPathBar    *path_bar,
1909                                GtkFileSystem *file_system)
1910 {
1911   const char *home;
1912
1913   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1914
1915   g_assert (path_bar->file_system == NULL);
1916
1917   path_bar->file_system = g_object_ref (file_system);
1918
1919   home = g_get_home_dir ();
1920   if (home != NULL)
1921     {
1922       const gchar *desktop;
1923
1924       path_bar->home_file = g_file_new_for_path (home);
1925       /* FIXME: Need file system backend specific way of getting the
1926        * Desktop path.
1927        */
1928       desktop = g_get_user_special_dir (G_USER_DIRECTORY_DESKTOP);
1929       if (desktop != NULL)
1930         path_bar->desktop_file = g_file_new_for_path (desktop);
1931       else
1932         path_bar->desktop_file = NULL;
1933     }
1934   else
1935     {
1936       path_bar->home_file = NULL;
1937       path_bar->desktop_file = NULL;
1938     }
1939   path_bar->root_file = g_file_new_for_path ("/");
1940 }
1941
1942 /**
1943  * _gtk_path_bar_up:
1944  * @path_bar: a #GtkPathBar
1945  *
1946  * If the selected button in the pathbar is not the furthest button "up" (in the
1947  * root direction), act as if the user clicked on the next button up.
1948  **/
1949 void
1950 _gtk_path_bar_up (GtkPathBar *path_bar)
1951 {
1952   GList *l;
1953
1954   for (l = path_bar->button_list; l; l = l->next)
1955     {
1956       GtkWidget *button = BUTTON_DATA (l->data)->button;
1957       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1958         {
1959           if (l->next)
1960             {
1961               GtkWidget *next_button = BUTTON_DATA (l->next->data)->button;
1962               button_clicked_cb (next_button, l->next->data);
1963             }
1964           break;
1965         }
1966     }
1967 }
1968
1969 /**
1970  * _gtk_path_bar_down:
1971  * @path_bar: a #GtkPathBar
1972  *
1973  * If the selected button in the pathbar is not the furthest button "down" (in the
1974  * leaf direction), act as if the user clicked on the next button down.
1975  **/
1976 void
1977 _gtk_path_bar_down (GtkPathBar *path_bar)
1978 {
1979   GList *l;
1980
1981   for (l = path_bar->button_list; l; l = l->next)
1982     {
1983       GtkWidget *button = BUTTON_DATA (l->data)->button;
1984       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1985         {
1986           if (l->prev)
1987             {
1988               GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button;
1989               button_clicked_cb (prev_button, l->prev->data);
1990             }
1991           break;
1992         }
1993     }
1994 }