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 "gtkalignment.h"
  29 #include "gtkarrow.h"
  30 #include "gtkdnd.h"
  31 #include "gtkimage.h"
  32 #include "gtkintl.h"
  33 #include "gtkicontheme.h"
  34 #include "gtkiconfactory.h"
  35 #include "gtklabel.h"
  36 #include "gtkhbox.h"
  37 #include "gtkmain.h"
  38 #include "gtkmarshalers.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 gboolean gtk_path_bar_scroll               (GtkWidget        *widget,
 107                                                    GdkEventScroll   *event);
 108 static void gtk_path_bar_scroll_up                (GtkPathBar       *path_bar);
 109 static void gtk_path_bar_scroll_down              (GtkPathBar       *path_bar);
 110 static void gtk_path_bar_stop_scrolling           (GtkPathBar       *path_bar);
 111 static gboolean gtk_path_bar_slider_up_defocus    (GtkWidget        *widget,
 112                                                    GdkEventButton   *event,
 113                                                    GtkPathBar       *path_bar);
 114 static gboolean gtk_path_bar_slider_down_defocus  (GtkWidget        *widget,
 115                                                    GdkEventButton   *event,
 116                                                    GtkPathBar       *path_bar);
 117 static gboolean gtk_path_bar_slider_button_press  (GtkWidget        *widget,
 118                                                    GdkEventButton   *event,
 119                                                    GtkPathBar       *path_bar);
 120 static gboolean gtk_path_bar_slider_button_release(GtkWidget        *widget,
 121                                                    GdkEventButton   *event,
 122                                                    GtkPathBar       *path_bar);
 123 static void gtk_path_bar_grab_notify              (GtkWidget        *widget,
 124                                                    gboolean          was_grabbed);
 125 static void gtk_path_bar_state_changed            (GtkWidget        *widget,
 126                                                    GtkStateType      previous_state);
 127 static void gtk_path_bar_style_updated            (GtkWidget        *widget);
 128 static void gtk_path_bar_screen_changed           (GtkWidget        *widget,
 129                                                    GdkScreen        *previous_screen);
 130 static void gtk_path_bar_check_icon_theme         (GtkPathBar       *path_bar);
 131 static void gtk_path_bar_update_button_appearance (GtkPathBar       *path_bar,
 132                                                    ButtonData       *button_data,
 133                                                    gboolean          current_dir);
 134
 135 static void
 136 on_slider_unmap (GtkWidget  *widget,
 137                  GtkPathBar *path_bar)
 138 {
 139   if (path_bar->timer &&
 140       ((widget == path_bar->up_slider_button && path_bar->scrolling_up) ||
 141        (widget == path_bar->down_slider_button && path_bar->scrolling_down)))
 142     gtk_path_bar_stop_scrolling (path_bar);
 143 }
 144
 145 static GtkWidget *
 146 get_slider_button (GtkPathBar  *path_bar,
 147                    GtkArrowType arrow_type)
 148 {
 149   GtkWidget *button;
 150   AtkObject *atk_obj;
 151
 152   gtk_widget_push_composite_child ();
 153
 154   button = gtk_button_new ();
 155   atk_obj = gtk_widget_get_accessible (button);
 156   if (arrow_type == GTK_ARROW_LEFT)
 157     atk_object_set_name (atk_obj, _("Up Path"));
 158   else
 159     atk_object_set_name (atk_obj, _("Down Path"));
 160
 161   gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE);
 162   gtk_container_add (GTK_CONTAINER (button),
 163                      gtk_arrow_new (arrow_type, GTK_SHADOW_OUT));
 164   gtk_container_add (GTK_CONTAINER (path_bar), button);
 165   gtk_widget_show_all (button);
 166
 167   g_signal_connect (G_OBJECT (button), "unmap",
 168                     G_CALLBACK (on_slider_unmap), path_bar);
 169
 170   gtk_widget_pop_composite_child ();
 171
 172   return button;
 173 }
 174
 175 static void
 176 gtk_path_bar_init (GtkPathBar *path_bar)
 177 {
 178   gtk_widget_set_has_window (GTK_WIDGET (path_bar), FALSE);
 179   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (path_bar), FALSE);
 180
 181   path_bar->get_info_cancellable = NULL;
 182
 183   path_bar->spacing = 0;
 184   path_bar->up_slider_button = get_slider_button (path_bar, GTK_ARROW_LEFT);
 185   path_bar->down_slider_button = get_slider_button (path_bar, GTK_ARROW_RIGHT);
 186   path_bar->icon_size = FALLBACK_ICON_SIZE;
 187
 188   g_signal_connect_swapped (path_bar->up_slider_button, "clicked",
 189                             G_CALLBACK (gtk_path_bar_scroll_up), path_bar);
 190   g_signal_connect_swapped (path_bar->down_slider_button, "clicked",
 191                             G_CALLBACK (gtk_path_bar_scroll_down), path_bar);
 192
 193   g_signal_connect (path_bar->up_slider_button, "focus-out-event",
 194                     G_CALLBACK (gtk_path_bar_slider_up_defocus), path_bar);
 195   g_signal_connect (path_bar->down_slider_button, "focus-out-event",
 196                     G_CALLBACK (gtk_path_bar_slider_down_defocus), path_bar);
 197
 198   g_signal_connect (path_bar->up_slider_button, "button-press-event",
 199                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 200   g_signal_connect (path_bar->up_slider_button, "button-release-event",
 201                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 202   g_signal_connect (path_bar->down_slider_button, "button-press-event",
 203                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 204   g_signal_connect (path_bar->down_slider_button, "button-release-event",
 205                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 206 }
 207
 208 static void
 209 gtk_path_bar_class_init (GtkPathBarClass *path_bar_class)
 210 {
 211   GObjectClass *gobject_class;
 212   GtkWidgetClass *widget_class;
 213   GtkContainerClass *container_class;
 214
 215   gobject_class = (GObjectClass *) path_bar_class;
 216   widget_class = (GtkWidgetClass *) path_bar_class;
 217   container_class = (GtkContainerClass *) path_bar_class;
 218
 219   gobject_class->finalize = gtk_path_bar_finalize;
 220   gobject_class->dispose = gtk_path_bar_dispose;
 221
 222   widget_class->get_preferred_width = gtk_path_bar_get_preferred_width;
 223   widget_class->get_preferred_height = gtk_path_bar_get_preferred_height;
 224   widget_class->realize = gtk_path_bar_realize;
 225   widget_class->unrealize = gtk_path_bar_unrealize;
 226   widget_class->map = gtk_path_bar_map;
 227   widget_class->unmap = gtk_path_bar_unmap;
 228   widget_class->size_allocate = gtk_path_bar_size_allocate;
 229   widget_class->style_updated = gtk_path_bar_style_updated;
 230   widget_class->screen_changed = gtk_path_bar_screen_changed;
 231   widget_class->grab_notify = gtk_path_bar_grab_notify;
 232   widget_class->state_changed = gtk_path_bar_state_changed;
 233   widget_class->scroll_event = gtk_path_bar_scroll;
 234
 235   container_class->add = gtk_path_bar_add;
 236   container_class->forall = gtk_path_bar_forall;
 237   container_class->remove = gtk_path_bar_remove;
 238   gtk_container_class_handle_border_width (container_class);
 239   /* FIXME: */
 240   /*  container_class->child_type = gtk_path_bar_child_type;*/
 241
 242   path_bar_signals [PATH_CLICKED] =
 243     g_signal_new (I_("path-clicked"),
 244                   G_OBJECT_CLASS_TYPE (gobject_class),
 245                   G_SIGNAL_RUN_FIRST,
 246                   G_STRUCT_OFFSET (GtkPathBarClass, path_clicked),
 247                   NULL, NULL,
 248                   _gtk_marshal_VOID__POINTER_POINTER_BOOLEAN,
 249                   G_TYPE_NONE, 3,
 250                   G_TYPE_POINTER,
 251                   G_TYPE_POINTER,
 252                   G_TYPE_BOOLEAN);
 253 }
 254
 255
 256 static void
 257 gtk_path_bar_finalize (GObject *object)
 258 {
 259   GtkPathBar *path_bar;
 260
 261   path_bar = GTK_PATH_BAR (object);
 262
 263   gtk_path_bar_stop_scrolling (path_bar);
 264
 265   g_list_free (path_bar->button_list);
 266   if (path_bar->root_file)
 267     g_object_unref (path_bar->root_file);
 268   if (path_bar->home_file)
 269     g_object_unref (path_bar->home_file);
 270   if (path_bar->desktop_file)
 271     g_object_unref (path_bar->desktop_file);
 272
 273   if (path_bar->root_icon)
 274     g_object_unref (path_bar->root_icon);
 275   if (path_bar->home_icon)
 276     g_object_unref (path_bar->home_icon);
 277   if (path_bar->desktop_icon)
 278     g_object_unref (path_bar->desktop_icon);
 279
 280   if (path_bar->file_system)
 281     g_object_unref (path_bar->file_system);
 282
 283   G_OBJECT_CLASS (gtk_path_bar_parent_class)->finalize (object);
 284 }
 285
 286 /* Removes the settings signal handler.  It's safe to call multiple times */
 287 static void
 288 remove_settings_signal (GtkPathBar *path_bar,
 289                         GdkScreen  *screen)
 290 {
 291   if (path_bar->settings_signal_id)
 292     {
 293       GtkSettings *settings;
 294
 295       settings = gtk_settings_get_for_screen (screen);
 296       g_signal_handler_disconnect (settings,
 297                                    path_bar->settings_signal_id);
 298       path_bar->settings_signal_id = 0;
 299     }
 300 }
 301
 302 static void
 303 gtk_path_bar_dispose (GObject *object)
 304 {
 305   GtkPathBar *path_bar = GTK_PATH_BAR (object);
 306
 307   remove_settings_signal (path_bar, gtk_widget_get_screen (GTK_WIDGET (object)));
 308
 309   if (path_bar->get_info_cancellable)
 310     g_cancellable_cancel (path_bar->get_info_cancellable);
 311   path_bar->get_info_cancellable = NULL;
 312
 313   G_OBJECT_CLASS (gtk_path_bar_parent_class)->dispose (object);
 314 }
 315
 316 /* Size requisition:
 317  *
 318  * Ideally, our size is determined by another widget, and we are just filling
 319  * available space.
 320  */
 321 static void
 322 gtk_path_bar_get_preferred_width (GtkWidget *widget,
 323                                   gint      *minimum,
 324                                   gint      *natural)
 325 {
 326   ButtonData *button_data;
 327   GtkPathBar *path_bar;
 328   GList *list;
 329   gint child_height;
 330   gint height;
 331   gint child_min, child_nat;
 332
 333   path_bar = GTK_PATH_BAR (widget);
 334
 335   *minimum = *natural = 0;
 336   height = 0;
 337
 338   for (list = path_bar->button_list; list; list = list->next)
 339     {
 340       button_data = BUTTON_DATA (list->data);
 341       gtk_widget_get_preferred_width (button_data->button, &child_min, &child_nat);
 342       gtk_widget_get_preferred_height (button_data->button, &child_height, NULL);
 343       height = MAX (height, child_height);
 344
 345       if (button_data->type == NORMAL_BUTTON)
 346         {
 347           /* Use 2*Height as button width because of ellipsized label.  */
 348           child_min = MAX (child_min, child_height * 2);
 349           child_nat = MAX (child_min, child_height * 2);
 350         }
 351
 352       *minimum = MAX (*minimum, child_min);
 353       *natural = MAX (*natural, child_nat);
 354     }
 355
 356   /* Add space for slider, if we have more than one path */
 357   /* Theoretically, the slider could be bigger than the other button.  But we're
 358    * not going to worry about that now.
 359    */
 360   path_bar->slider_width = MIN (height * 2 / 3 + 5, height);
 361   if (path_bar->button_list && path_bar->button_list->next != NULL)
 362     {
 363       *minimum += (path_bar->spacing + path_bar->slider_width) * 2;
 364       *natural += (path_bar->spacing + path_bar->slider_width) * 2;
 365     }
 366 }
 367
 368 static void
 369 gtk_path_bar_get_preferred_height (GtkWidget *widget,
 370                                    gint      *minimum,
 371                                    gint      *natural)
 372 {
 373   ButtonData *button_data;
 374   GtkPathBar *path_bar;
 375   GList *list;
 376   gint child_min, child_nat;
 377
 378   path_bar = GTK_PATH_BAR (widget);
 379
 380   *minimum = *natural = 0;
 381
 382   for (list = path_bar->button_list; list; list = list->next)
 383     {
 384       button_data = BUTTON_DATA (list->data);
 385       gtk_widget_get_preferred_height (button_data->button, &child_min, &child_nat);
 386
 387       *minimum = MAX (*minimum, child_min);
 388       *natural = MAX (*natural, child_nat);
 389     }
 390 }
 391
 392 static void
 393 gtk_path_bar_update_slider_buttons (GtkPathBar *path_bar)
 394 {
 395   if (path_bar->button_list)
 396     {
 397       GtkWidget *button;
 398
 399       button = BUTTON_DATA (path_bar->button_list->data)->button;
 400       if (gtk_widget_get_child_visible (button))
 401         {
 402           gtk_path_bar_stop_scrolling (path_bar);
 403           gtk_widget_set_sensitive (path_bar->down_slider_button, FALSE);
 404         }
 405       else
 406         gtk_widget_set_sensitive (path_bar->down_slider_button, TRUE);
 407
 408       button = BUTTON_DATA (g_list_last (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->up_slider_button, FALSE);
 413         }
 414       else
 415         gtk_widget_set_sensitive (path_bar->up_slider_button, TRUE);
 416     }
 417 }
 418
 419 static void
 420 gtk_path_bar_map (GtkWidget *widget)
 421 {
 422   gdk_window_show (GTK_PATH_BAR (widget)->event_window);
 423
 424   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->map (widget);
 425 }
 426
 427 static void
 428 gtk_path_bar_unmap (GtkWidget *widget)
 429 {
 430   gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 431   gdk_window_hide (GTK_PATH_BAR (widget)->event_window);
 432
 433   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unmap (widget);
 434 }
 435
 436 static void
 437 gtk_path_bar_realize (GtkWidget *widget)
 438 {
 439   GtkPathBar *path_bar;
 440   GtkAllocation allocation;
 441   GdkWindow *window;
 442   GdkWindowAttr attributes;
 443   gint attributes_mask;
 444
 445   gtk_widget_set_realized (widget, TRUE);
 446
 447   path_bar = GTK_PATH_BAR (widget);
 448   window = gtk_widget_get_parent_window (widget);
 449   gtk_widget_set_window (widget, window);
 450   g_object_ref (window);
 451
 452   gtk_widget_get_allocation (widget, &allocation);
 453
 454   attributes.window_type = GDK_WINDOW_CHILD;
 455   attributes.x = allocation.x;
 456   attributes.y = allocation.y;
 457   attributes.width = allocation.width;
 458   attributes.height = allocation.height;
 459   attributes.wclass = GDK_INPUT_ONLY;
 460   attributes.event_mask = gtk_widget_get_events (widget);
 461   attributes.event_mask |= GDK_SCROLL_MASK;
 462   attributes_mask = GDK_WA_X | GDK_WA_Y;
 463
 464   path_bar->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
 465                                            &attributes, attributes_mask);
 466   gdk_window_set_user_data (path_bar->event_window, widget);
 467 }
 468
 469 static void
 470 gtk_path_bar_unrealize (GtkWidget *widget)
 471 {
 472   GtkPathBar *path_bar;
 473
 474   path_bar = GTK_PATH_BAR (widget);
 475
 476   gdk_window_set_user_data (path_bar->event_window, NULL);
 477   gdk_window_destroy (path_bar->event_window);
 478   path_bar->event_window = NULL;
 479
 480   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unrealize (widget);
 481 }
 482
 483 /* This is a tad complicated
 484  */
 485 static void
 486 gtk_path_bar_size_allocate (GtkWidget     *widget,
 487                             GtkAllocation *allocation)
 488 {
 489   GtkWidget *child;
 490   GtkPathBar *path_bar = GTK_PATH_BAR (widget);
 491   GtkTextDirection direction;
 492   GtkAllocation child_allocation;
 493   GList *list, *first_button;
 494   gint width;
 495   gint allocation_width;
 496   gboolean need_sliders = FALSE;
 497   gint up_slider_offset = 0;
 498   GtkRequisition child_requisition;
 499
 500   gtk_widget_set_allocation (widget, allocation);
 501
 502   if (gtk_widget_get_realized (widget))
 503     gdk_window_move_resize (path_bar->event_window,
 504                             allocation->x, allocation->y,
 505                             allocation->width, allocation->height);
 506
 507   /* No path is set; we don't have to allocate anything. */
 508   if (path_bar->button_list == NULL)
 509     return;
 510
 511   direction = gtk_widget_get_direction (widget);
 512   allocation_width = allocation->width;
 513
 514   /* First, we check to see if we need the scrollbars. */
 515   if (path_bar->fake_root)
 516     width = path_bar->spacing + path_bar->slider_width;
 517   else
 518     width = 0;
 519
 520   for (list = path_bar->button_list; list; list = list->next)
 521     {
 522       child = BUTTON_DATA (list->data)->button;
 523
 524       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 525
 526       width += child_requisition.width + path_bar->spacing;
 527       if (list == path_bar->fake_root)
 528         break;
 529     }
 530
 531   if (width <= allocation_width)
 532     {
 533       if (path_bar->fake_root)
 534         first_button = path_bar->fake_root;
 535       else
 536         first_button = g_list_last (path_bar->button_list);
 537     }
 538   else
 539     {
 540       gboolean reached_end = FALSE;
 541       gint slider_space = 2 * (path_bar->spacing + path_bar->slider_width);
 542
 543       if (path_bar->first_scrolled_button)
 544         first_button = path_bar->first_scrolled_button;
 545       else
 546         first_button = path_bar->button_list;
 547       need_sliders = TRUE;
 548
 549       /* To see how much space we have, and how many buttons we can display.
 550        * We start at the first button, count forward until hit the new
 551        * button, then count backwards.
 552        */
 553       /* Count down the path chain towards the end. */
 554       gtk_widget_get_preferred_size (BUTTON_DATA (first_button->data)->button,
 555                                      &child_requisition, NULL);
 556
 557       width = child_requisition.width;
 558       list = first_button->prev;
 559       while (list && !reached_end)
 560         {
 561           child = BUTTON_DATA (list->data)->button;
 562
 563           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 564
 565           if (width + child_requisition.width +
 566               path_bar->spacing + slider_space > allocation_width)
 567             reached_end = TRUE;
 568           else if (list == path_bar->fake_root)
 569             break;
 570           else
 571             width += child_requisition.width + path_bar->spacing;
 572
 573           list = list->prev;
 574         }
 575
 576       /* Finally, we walk up, seeing how many of the previous buttons we can
 577        * add */
 578       while (first_button->next && !reached_end)
 579         {
 580           child = BUTTON_DATA (first_button->next->data)->button;
 581
 582           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 583
 584           if (width + child_requisition.width + path_bar->spacing + slider_space > allocation_width)
 585             {
 586               reached_end = TRUE;
 587             }
 588           else
 589             {
 590               width += child_requisition.width + path_bar->spacing;
 591               if (first_button == path_bar->fake_root)
 592                 break;
 593               first_button = first_button->next;
 594             }
 595         }
 596     }
 597
 598   /* Now, we allocate space to the buttons */
 599   child_allocation.y = allocation->y;
 600   child_allocation.height = allocation->height;
 601
 602   if (direction == GTK_TEXT_DIR_RTL)
 603     {
 604       child_allocation.x = allocation->x + allocation->width;
 605       if (need_sliders || path_bar->fake_root)
 606         {
 607           child_allocation.x -= (path_bar->spacing + path_bar->slider_width);
 608           up_slider_offset = allocation->width - path_bar->slider_width;
 609         }
 610     }
 611   else
 612     {
 613       child_allocation.x = allocation->x;
 614       if (need_sliders || path_bar->fake_root)
 615         {
 616           up_slider_offset = 0;
 617           child_allocation.x += (path_bar->spacing + path_bar->slider_width);
 618         }
 619     }
 620
 621   for (list = first_button; list; list = list->prev)
 622     {
 623       GtkAllocation widget_allocation;
 624       ButtonData *button_data;
 625
 626       button_data = BUTTON_DATA (list->data);
 627       child = button_data->button;
 628
 629       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 630
 631       child_allocation.width = MIN (child_requisition.width,
 632                                     allocation_width - (path_bar->spacing + path_bar->slider_width) * 2);
 633
 634       if (direction == GTK_TEXT_DIR_RTL)
 635         child_allocation.x -= child_allocation.width;
 636
 637       /* Check to see if we've don't have any more space to allocate buttons */
 638       if (need_sliders && direction == GTK_TEXT_DIR_RTL)
 639         {
 640           gtk_widget_get_allocation (widget, &widget_allocation);
 641           if (child_allocation.x - path_bar->spacing - path_bar->slider_width < widget_allocation.x)
 642             break;
 643         }
 644       else if (need_sliders && direction == GTK_TEXT_DIR_LTR)
 645         {
 646           gtk_widget_get_allocation (widget, &widget_allocation);
 647           if (child_allocation.x + child_allocation.width + path_bar->spacing + path_bar->slider_width >
 648               widget_allocation.x + allocation_width)
 649             break;
 650         }
 651
 652       if (child_allocation.width < child_requisition.width)
 653         {
 654           if (!gtk_widget_get_has_tooltip (child))
 655             gtk_widget_set_tooltip_text (child, button_data->dir_name);
 656         }
 657       else if (gtk_widget_get_has_tooltip (child))
 658         gtk_widget_set_tooltip_text (child, NULL);
 659
 660       gtk_widget_set_child_visible (child, TRUE);
 661       gtk_widget_size_allocate (child, &child_allocation);
 662
 663       if (direction == GTK_TEXT_DIR_RTL)
 664         child_allocation.x -= path_bar->spacing;
 665       else
 666         child_allocation.x += child_allocation.width + path_bar->spacing;
 667     }
 668   /* Now we go hide all the widgets that don't fit */
 669   while (list)
 670     {
 671       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 672       list = list->prev;
 673     }
 674   for (list = first_button->next; list; list = list->next)
 675     {
 676       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 677     }
 678
 679   if (need_sliders || path_bar->fake_root)
 680     {
 681       child_allocation.width = path_bar->slider_width;
 682       child_allocation.x = up_slider_offset + allocation->x;
 683       gtk_widget_size_allocate (path_bar->up_slider_button, &child_allocation);
 684
 685       gtk_widget_set_child_visible (path_bar->up_slider_button, TRUE);
 686       gtk_widget_show_all (path_bar->up_slider_button);
 687     }
 688   else
 689     gtk_widget_set_child_visible (path_bar->up_slider_button, FALSE);
 690
 691   if (need_sliders)
 692     {
 693       child_allocation.width = path_bar->slider_width;
 694
 695       if (direction == GTK_TEXT_DIR_RTL)
 696         child_allocation.x = 0;
 697       else
 698         child_allocation.x = allocation->width - path_bar->slider_width;
 699
 700       child_allocation.x += allocation->x;
 701
 702       gtk_widget_size_allocate (path_bar->down_slider_button, &child_allocation);
 703
 704       gtk_widget_set_child_visible (path_bar->down_slider_button, TRUE);
 705       gtk_widget_show_all (path_bar->down_slider_button);
 706       gtk_path_bar_update_slider_buttons (path_bar);
 707     }
 708   else
 709     gtk_widget_set_child_visible (path_bar->down_slider_button, FALSE);
 710 }
 711
 712 static void
 713 gtk_path_bar_style_updated (GtkWidget *widget)
 714 {
 715   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_updated (widget);
 716
 717   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 718 }
 719
 720 static void
 721 gtk_path_bar_screen_changed (GtkWidget *widget,
 722                              GdkScreen *previous_screen)
 723 {
 724   if (GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed)
 725     GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed (widget, previous_screen);
 726
 727   /* We might nave a new settings, so we remove the old one */
 728   if (previous_screen)
 729     remove_settings_signal (GTK_PATH_BAR (widget), previous_screen);
 730
 731   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 732 }
 733
 734 static gboolean
 735 gtk_path_bar_scroll (GtkWidget      *widget,
 736                      GdkEventScroll *event)
 737 {
 738   switch (event->direction)
 739     {
 740     case GDK_SCROLL_RIGHT:
 741     case GDK_SCROLL_DOWN:
 742       gtk_path_bar_scroll_down (GTK_PATH_BAR (widget));
 743       break;
 744     case GDK_SCROLL_LEFT:
 745     case GDK_SCROLL_UP:
 746       gtk_path_bar_scroll_up (GTK_PATH_BAR (widget));
 747       break;
 748     }
 749
 750   return TRUE;
 751 }
 752
 753 static void
 754 gtk_path_bar_add (GtkContainer *container,
 755                   GtkWidget    *widget)
 756 {
 757   gtk_widget_set_parent (widget, GTK_WIDGET (container));
 758 }
 759
 760 static void
 761 gtk_path_bar_remove_1 (GtkContainer *container,
 762                        GtkWidget    *widget)
 763 {
 764   gboolean was_visible = gtk_widget_get_visible (widget);
 765   gtk_widget_unparent (widget);
 766   if (was_visible)
 767     gtk_widget_queue_resize (GTK_WIDGET (container));
 768 }
 769
 770 static void
 771 gtk_path_bar_remove (GtkContainer *container,
 772                      GtkWidget    *widget)
 773 {
 774   GtkPathBar *path_bar;
 775   GList *children;
 776
 777   path_bar = GTK_PATH_BAR (container);
 778
 779   if (widget == path_bar->up_slider_button)
 780     {
 781       gtk_path_bar_remove_1 (container, widget);
 782       path_bar->up_slider_button = NULL;
 783       return;
 784     }
 785
 786   if (widget == path_bar->down_slider_button)
 787     {
 788       gtk_path_bar_remove_1 (container, widget);
 789       path_bar->down_slider_button = NULL;
 790       return;
 791     }
 792
 793   children = path_bar->button_list;
 794   while (children)
 795     {
 796       if (widget == BUTTON_DATA (children->data)->button)
 797         {
 798           gtk_path_bar_remove_1 (container, widget);
 799           path_bar->button_list = g_list_remove_link (path_bar->button_list, children);
 800           g_list_free (children);
 801           return;
 802         }
 803
 804       children = children->next;
 805     }
 806 }
 807
 808 static void
 809 gtk_path_bar_forall (GtkContainer *container,
 810                      gboolean      include_internals,
 811                      GtkCallback   callback,
 812                      gpointer      callback_data)
 813 {
 814   GtkPathBar *path_bar;
 815   GList *children;
 816
 817   g_return_if_fail (callback != NULL);
 818   path_bar = GTK_PATH_BAR (container);
 819
 820   children = path_bar->button_list;
 821   while (children)
 822     {
 823       GtkWidget *child;
 824       child = BUTTON_DATA (children->data)->button;
 825       children = children->next;
 826
 827       (* callback) (child, callback_data);
 828     }
 829
 830   if (path_bar->up_slider_button)
 831     (* callback) (path_bar->up_slider_button, callback_data);
 832
 833   if (path_bar->down_slider_button)
 834     (* callback) (path_bar->down_slider_button, callback_data);
 835 }
 836
 837 static void
 838 gtk_path_bar_scroll_down (GtkPathBar *path_bar)
 839 {
 840   GtkAllocation allocation, button_allocation;
 841   GList *list;
 842   GList *down_button = NULL;
 843   gint space_available;
 844
 845   if (path_bar->ignore_click)
 846     {
 847       path_bar->ignore_click = FALSE;
 848       return;
 849     }
 850
 851   if (gtk_widget_get_child_visible (BUTTON_DATA (path_bar->button_list->data)->button))
 852     {
 853       /* Return if the last button is already visible */
 854       return;
 855     }
 856
 857   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 858
 859   /* We find the button at the 'down' end that we have to make
 860    * visible */
 861   for (list = path_bar->button_list; list; list = list->next)
 862     {
 863       if (list->next && gtk_widget_get_child_visible (BUTTON_DATA (list->next->data)->button))
 864         {
 865           down_button = list;
 866           break;
 867         }
 868     }
 869
 870   gtk_widget_get_allocation (GTK_WIDGET (path_bar), &allocation);
 871   gtk_widget_get_allocation (BUTTON_DATA (down_button->data)->button, &button_allocation);
 872
 873   space_available = (allocation.width
 874                      - 2 * path_bar->spacing - 2 * path_bar->slider_width
 875                      - button_allocation.width);
 876   path_bar->first_scrolled_button = down_button;
 877
 878   /* We have space_available free space that's not being used.
 879    * So we walk down from the end, adding buttons until we use all free space.
 880    */
 881   while (space_available > 0)
 882     {
 883       path_bar->first_scrolled_button = down_button;
 884       down_button = down_button->next;
 885       if (!down_button)
 886         break;
 887       space_available -= (button_allocation.width
 888                           + path_bar->spacing);
 889     }
 890 }
 891
 892 static void
 893 gtk_path_bar_scroll_up (GtkPathBar *path_bar)
 894 {
 895   GList *list;
 896
 897   if (path_bar->ignore_click)
 898     {
 899       path_bar->ignore_click = FALSE;
 900       return;
 901     }
 902
 903   list = g_list_last (path_bar->button_list);
 904
 905   if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
 906     {
 907       /* Return if the first button is already visible */
 908       return;
 909     }
 910
 911   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 912
 913   for ( ; list; list = list->prev)
 914     {
 915       if (list->prev && gtk_widget_get_child_visible (BUTTON_DATA (list->prev->data)->button))
 916         {
 917           if (list->prev == path_bar->fake_root)
 918             path_bar->fake_root = NULL;
 919           path_bar->first_scrolled_button = list;
 920           return;
 921         }
 922     }
 923 }
 924
 925 static gboolean
 926 gtk_path_bar_scroll_timeout (GtkPathBar *path_bar)
 927 {
 928   gboolean retval = FALSE;
 929
 930   if (path_bar->timer)
 931     {
 932       if (path_bar->scrolling_up)
 933         gtk_path_bar_scroll_up (path_bar);
 934       else if (path_bar->scrolling_down)
 935         gtk_path_bar_scroll_down (path_bar);
 936
 937       if (path_bar->need_timer)
 938         {
 939           GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (path_bar));
 940           guint        timeout;
 941
 942           g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
 943
 944           path_bar->need_timer = FALSE;
 945
 946           path_bar->timer = gdk_threads_add_timeout (timeout * SCROLL_DELAY_FACTOR,
 947                                            (GSourceFunc)gtk_path_bar_scroll_timeout,
 948                                            path_bar);
 949         }
 950       else
 951         retval = TRUE;
 952     }
 953
 954   return retval;
 955 }
 956
 957 static void
 958 gtk_path_bar_stop_scrolling (GtkPathBar *path_bar)
 959 {
 960   if (path_bar->timer)
 961     {
 962       g_source_remove (path_bar->timer);
 963       path_bar->timer = 0;
 964       path_bar->need_timer = FALSE;
 965     }
 966 }
 967
 968 static gboolean
 969 gtk_path_bar_slider_up_defocus (GtkWidget      *widget,
 970                                     GdkEventButton *event,
 971                                     GtkPathBar     *path_bar)
 972 {
 973   GList *list;
 974   GList *up_button = NULL;
 975
 976   if (event->type != GDK_FOCUS_CHANGE)
 977     return FALSE;
 978
 979   for (list = g_list_last (path_bar->button_list); list; list = list->prev)
 980     {
 981       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
 982         {
 983           up_button = list;
 984           break;
 985         }
 986     }
 987
 988   /* don't let the focus vanish */
 989   if ((!gtk_widget_is_sensitive (path_bar->up_slider_button)) ||
 990       (!gtk_widget_get_child_visible (path_bar->up_slider_button)))
 991     gtk_widget_grab_focus (BUTTON_DATA (up_button->data)->button);
 992
 993   return FALSE;
 994 }
 995
 996 static gboolean
 997 gtk_path_bar_slider_down_defocus (GtkWidget      *widget,
 998                                     GdkEventButton *event,
 999                                     GtkPathBar     *path_bar)
1000 {
1001   GList *list;
1002   GList *down_button = NULL;
1003
1004   if (event->type != GDK_FOCUS_CHANGE)
1005     return FALSE;
1006
1007   for (list = path_bar->button_list; list; list = list->next)
1008     {
1009       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
1010         {
1011           down_button = list;
1012           break;
1013         }
1014     }
1015
1016   /* don't let the focus vanish */
1017   if ((!gtk_widget_is_sensitive (path_bar->down_slider_button)) ||
1018       (!gtk_widget_get_child_visible (path_bar->down_slider_button)))
1019     gtk_widget_grab_focus (BUTTON_DATA (down_button->data)->button);
1020
1021   return FALSE;
1022 }
1023
1024 static gboolean
1025 gtk_path_bar_slider_button_press (GtkWidget      *widget,
1026                                   GdkEventButton *event,
1027                                   GtkPathBar     *path_bar)
1028 {
1029   if (event->type != GDK_BUTTON_PRESS || event->button != 1)
1030     return FALSE;
1031
1032   path_bar->ignore_click = FALSE;
1033
1034   if (widget == path_bar->up_slider_button)
1035     {
1036       path_bar->scrolling_down = FALSE;
1037       path_bar->scrolling_up = TRUE;
1038       gtk_path_bar_scroll_up (path_bar);
1039     }
1040   else if (widget == path_bar->down_slider_button)
1041     {
1042       path_bar->scrolling_up = FALSE;
1043       path_bar->scrolling_down = TRUE;
1044       gtk_path_bar_scroll_down (path_bar);
1045     }
1046
1047   if (!path_bar->timer)
1048     {
1049       GtkSettings *settings = gtk_widget_get_settings (widget);
1050       guint        timeout;
1051
1052       g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
1053
1054       path_bar->need_timer = TRUE;
1055       path_bar->timer = gdk_threads_add_timeout (timeout,
1056                                        (GSourceFunc)gtk_path_bar_scroll_timeout,
1057                                        path_bar);
1058     }
1059
1060   return FALSE;
1061 }
1062
1063 static gboolean
1064 gtk_path_bar_slider_button_release (GtkWidget      *widget,
1065                                     GdkEventButton *event,
1066                                     GtkPathBar     *path_bar)
1067 {
1068   if (event->type != GDK_BUTTON_RELEASE)
1069     return FALSE;
1070
1071   path_bar->ignore_click = TRUE;
1072   gtk_path_bar_stop_scrolling (path_bar);
1073
1074   return FALSE;
1075 }
1076
1077 static void
1078 gtk_path_bar_grab_notify (GtkWidget *widget,
1079                           gboolean   was_grabbed)
1080 {
1081   if (!was_grabbed)
1082     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1083 }
1084
1085 static void
1086 gtk_path_bar_state_changed (GtkWidget    *widget,
1087                             GtkStateType  previous_state)
1088 {
1089   if (!gtk_widget_is_sensitive (widget))
1090     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1091 }
1092
1093
1094 /* Changes the icons wherever it is needed */
1095 static void
1096 reload_icons (GtkPathBar *path_bar)
1097 {
1098   GList *list;
1099
1100   if (path_bar->root_icon)
1101     {
1102       g_object_unref (path_bar->root_icon);
1103       path_bar->root_icon = NULL;
1104     }
1105   if (path_bar->home_icon)
1106     {
1107       g_object_unref (path_bar->home_icon);
1108       path_bar->home_icon = NULL;
1109     }
1110   if (path_bar->desktop_icon)
1111     {
1112       g_object_unref (path_bar->desktop_icon);
1113       path_bar->desktop_icon = NULL;
1114     }
1115
1116   for (list = path_bar->button_list; list; list = list->next)
1117     {
1118       ButtonData *button_data;
1119       gboolean current_dir;
1120
1121       button_data = BUTTON_DATA (list->data);
1122       if (button_data->type != NORMAL_BUTTON)
1123         {
1124           current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button));
1125           gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1126         }
1127     }
1128
1129 }
1130
1131 static void
1132 change_icon_theme (GtkPathBar *path_bar)
1133 {
1134   GtkSettings *settings;
1135   gint width, height;
1136
1137   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1138
1139   if (gtk_icon_size_lookup_for_settings (settings, GTK_ICON_SIZE_MENU, &width, &height))
1140     path_bar->icon_size = MAX (width, height);
1141   else
1142     path_bar->icon_size = FALLBACK_ICON_SIZE;
1143
1144   reload_icons (path_bar);
1145 }
1146 /* Callback used when a GtkSettings value changes */
1147 static void
1148 settings_notify_cb (GObject    *object,
1149                     GParamSpec *pspec,
1150                     GtkPathBar *path_bar)
1151 {
1152   const char *name;
1153
1154   name = g_param_spec_get_name (pspec);
1155
1156   if (! strcmp (name, "gtk-icon-theme-name") ||
1157       ! strcmp (name, "gtk-icon-sizes"))
1158     change_icon_theme (path_bar);
1159 }
1160
1161 static void
1162 gtk_path_bar_check_icon_theme (GtkPathBar *path_bar)
1163 {
1164   GtkSettings *settings;
1165
1166   if (path_bar->settings_signal_id)
1167     return;
1168
1169   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1170   path_bar->settings_signal_id = g_signal_connect (settings, "notify", G_CALLBACK (settings_notify_cb), path_bar);
1171
1172   change_icon_theme (path_bar);
1173 }
1174
1175 /* Public functions and their helpers */
1176 static void
1177 gtk_path_bar_clear_buttons (GtkPathBar *path_bar)
1178 {
1179   while (path_bar->button_list != NULL)
1180     {
1181       gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (path_bar->button_list->data)->button);
1182     }
1183   path_bar->first_scrolled_button = NULL;
1184   path_bar->fake_root = NULL;
1185 }
1186
1187 static void
1188 button_clicked_cb (GtkWidget *button,
1189                    gpointer   data)
1190 {
1191   ButtonData *button_data;
1192   GtkPathBar *path_bar;
1193   GList *button_list;
1194   gboolean child_is_hidden;
1195   GFile *child_file;
1196
1197   button_data = BUTTON_DATA (data);
1198   if (button_data->ignore_changes)
1199     return;
1200
1201   path_bar = GTK_PATH_BAR (gtk_widget_get_parent (button));
1202
1203   button_list = g_list_find (path_bar->button_list, button_data);
1204   g_assert (button_list != NULL);
1205
1206   g_signal_handlers_block_by_func (button,
1207                                    G_CALLBACK (button_clicked_cb), data);
1208   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
1209   g_signal_handlers_unblock_by_func (button,
1210                                      G_CALLBACK (button_clicked_cb), data);
1211
1212   if (button_list->prev)
1213     {
1214       ButtonData *child_data;
1215
1216       child_data = BUTTON_DATA (button_list->prev->data);
1217       child_file = child_data->file;
1218       child_is_hidden = child_data->file_is_hidden;
1219     }
1220   else
1221     {
1222       child_file = NULL;
1223       child_is_hidden = FALSE;
1224     }
1225
1226   g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0,
1227                  button_data->file, child_file, child_is_hidden);
1228 }
1229
1230 struct SetButtonImageData
1231 {
1232   GtkPathBar *path_bar;
1233   ButtonData *button_data;
1234 };
1235
1236 static void
1237 set_button_image_get_info_cb (GCancellable *cancellable,
1238                               GFileInfo    *info,
1239                               const GError *error,
1240                               gpointer      user_data)
1241 {
1242   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1243   GdkPixbuf *pixbuf;
1244   struct SetButtonImageData *data = user_data;
1245
1246   if (cancellable != data->button_data->cancellable)
1247     goto out;
1248
1249   data->button_data->cancellable = NULL;
1250
1251   if (!data->button_data->button)
1252     {
1253       g_free (data->button_data);
1254       goto out;
1255     }
1256
1257   if (cancelled || error)
1258     goto out;
1259
1260   pixbuf = _gtk_file_info_render_icon (info, GTK_WIDGET (data->path_bar),
1261                                        data->path_bar->icon_size);
1262   gtk_image_set_from_pixbuf (GTK_IMAGE (data->button_data->image), pixbuf);
1263
1264   switch (data->button_data->type)
1265     {
1266       case HOME_BUTTON:
1267         if (data->path_bar->home_icon)
1268           g_object_unref (pixbuf);
1269         else
1270           data->path_bar->home_icon = pixbuf;
1271         break;
1272
1273       case DESKTOP_BUTTON:
1274         if (data->path_bar->desktop_icon)
1275           g_object_unref (pixbuf);
1276         else
1277           data->path_bar->desktop_icon = pixbuf;
1278         break;
1279
1280       default:
1281         break;
1282     };
1283
1284 out:
1285   g_free (data);
1286   g_object_unref (cancellable);
1287 }
1288
1289 static void
1290 set_button_image (GtkPathBar *path_bar,
1291                   ButtonData *button_data)
1292 {
1293   GtkFileSystemVolume *volume;
1294   struct SetButtonImageData *data;
1295
1296   switch (button_data->type)
1297     {
1298     case ROOT_BUTTON:
1299
1300       if (path_bar->root_icon != NULL)
1301         {
1302           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1303           break;
1304         }
1305
1306       volume = _gtk_file_system_get_volume_for_file (path_bar->file_system, path_bar->root_file);
1307       if (volume == NULL)
1308         return;
1309
1310       path_bar->root_icon = _gtk_file_system_volume_render_icon (volume,
1311                                                                  GTK_WIDGET (path_bar),
1312                                                                  path_bar->icon_size,
1313                                                                  NULL);
1314       _gtk_file_system_volume_unref (volume);
1315
1316       gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1317       break;
1318
1319     case HOME_BUTTON:
1320       if (path_bar->home_icon != NULL)
1321         {
1322           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->home_icon);
1323           break;
1324         }
1325
1326       data = g_new0 (struct SetButtonImageData, 1);
1327       data->path_bar = path_bar;
1328       data->button_data = button_data;
1329
1330       if (button_data->cancellable)
1331         g_cancellable_cancel (button_data->cancellable);
1332
1333       button_data->cancellable =
1334         _gtk_file_system_get_info (path_bar->file_system,
1335                                    path_bar->home_file,
1336                                    "standard::icon",
1337                                    set_button_image_get_info_cb,
1338                                    data);
1339       break;
1340
1341     case DESKTOP_BUTTON:
1342       if (path_bar->desktop_icon != NULL)
1343         {
1344           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->desktop_icon);
1345           break;
1346         }
1347
1348       data = g_new0 (struct SetButtonImageData, 1);
1349       data->path_bar = path_bar;
1350       data->button_data = button_data;
1351
1352       if (button_data->cancellable)
1353         g_cancellable_cancel (button_data->cancellable);
1354
1355       button_data->cancellable =
1356         _gtk_file_system_get_info (path_bar->file_system,
1357                                    path_bar->desktop_file,
1358                                    "standard::icon",
1359                                    set_button_image_get_info_cb,
1360                                    data);
1361       break;
1362     default:
1363       break;
1364     }
1365 }
1366
1367 static void
1368 button_data_free (ButtonData *button_data)
1369 {
1370   if (button_data->file)
1371     g_object_unref (button_data->file);
1372   button_data->file = NULL;
1373
1374   g_free (button_data->dir_name);
1375   button_data->dir_name = NULL;
1376
1377   button_data->button = NULL;
1378
1379   if (button_data->cancellable)
1380     g_cancellable_cancel (button_data->cancellable);
1381   else
1382     g_free (button_data);
1383 }
1384
1385 static const char *
1386 get_dir_name (ButtonData *button_data)
1387 {
1388   return button_data->dir_name;
1389 }
1390
1391 /* We always want to request the same size for the label, whether
1392  * or not the contents are bold
1393  */
1394 static void
1395 set_label_size_request (GtkWidget  *alignment,
1396                         ButtonData *button_data)
1397 {
1398   const gchar *dir_name = get_dir_name (button_data);
1399   PangoLayout *layout = gtk_widget_create_pango_layout (button_data->label, dir_name);
1400   gint width, height, bold_width, bold_height;
1401   gchar *markup;
1402
1403   pango_layout_get_pixel_size (layout, &width, &height);
1404
1405   markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1406   pango_layout_set_markup (layout, markup, -1);
1407   g_free (markup);
1408
1409   pango_layout_get_pixel_size (layout, &bold_width, &bold_height);
1410
1411   gtk_widget_set_size_request (alignment,
1412                                MAX (width, bold_width),
1413                                MAX (height, bold_height));
1414   g_object_unref (layout);
1415 }
1416
1417 static void
1418 gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
1419                                        ButtonData *button_data,
1420                                        gboolean    current_dir)
1421 {
1422   const gchar *dir_name = get_dir_name (button_data);
1423
1424   if (button_data->label != NULL)
1425     {
1426       if (current_dir)
1427         {
1428           char *markup;
1429
1430           markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1431           gtk_label_set_markup (GTK_LABEL (button_data->label), markup);
1432           g_free (markup);
1433         }
1434       else
1435         {
1436           gtk_label_set_text (GTK_LABEL (button_data->label), dir_name);
1437         }
1438     }
1439
1440   if (button_data->image != NULL)
1441     {
1442       set_button_image (path_bar, button_data);
1443     }
1444
1445   if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir)
1446     {
1447       button_data->ignore_changes = TRUE;
1448       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir);
1449       button_data->ignore_changes = FALSE;
1450     }
1451 }
1452
1453 static ButtonType
1454 find_button_type (GtkPathBar  *path_bar,
1455                   GFile       *file)
1456 {
1457   if (path_bar->root_file != NULL &&
1458       g_file_equal (file, path_bar->root_file))
1459     return ROOT_BUTTON;
1460   if (path_bar->home_file != NULL &&
1461       g_file_equal (file, path_bar->home_file))
1462     return HOME_BUTTON;
1463   if (path_bar->desktop_file != NULL &&
1464       g_file_equal (file, path_bar->desktop_file))
1465     return DESKTOP_BUTTON;
1466
1467  return NORMAL_BUTTON;
1468 }
1469
1470 static void
1471 button_drag_data_get_cb (GtkWidget        *widget,
1472                          GdkDragContext   *context,
1473                          GtkSelectionData *selection_data,
1474                          guint             info,
1475                          guint             time_,
1476                          gpointer          data)
1477 {
1478   ButtonData *button_data;
1479   char *uris[2];
1480
1481   button_data = data;
1482
1483   uris[0] = g_file_get_uri (button_data->file);
1484   uris[1] = NULL;
1485
1486   gtk_selection_data_set_uris (selection_data, uris);
1487
1488   g_free (uris[0]);
1489 }
1490
1491 static ButtonData *
1492 make_directory_button (GtkPathBar  *path_bar,
1493                        const char  *dir_name,
1494                        GFile       *file,
1495                        gboolean     current_dir,
1496                        gboolean     file_is_hidden)
1497 {
1498   AtkObject *atk_obj;
1499   GtkWidget *child = NULL;
1500   GtkWidget *label_alignment = NULL;
1501   ButtonData *button_data;
1502
1503   file_is_hidden = !! file_is_hidden;
1504   /* Is it a special button? */
1505   button_data = g_new0 (ButtonData, 1);
1506
1507   button_data->type = find_button_type (path_bar, file);
1508   button_data->button = gtk_toggle_button_new ();
1509   atk_obj = gtk_widget_get_accessible (button_data->button);
1510   gtk_button_set_focus_on_click (GTK_BUTTON (button_data->button), FALSE);
1511
1512   switch (button_data->type)
1513     {
1514     case ROOT_BUTTON:
1515       button_data->image = gtk_image_new ();
1516       child = button_data->image;
1517       button_data->label = NULL;
1518       atk_object_set_name (atk_obj, _("File System Root"));
1519       break;
1520     case HOME_BUTTON:
1521     case DESKTOP_BUTTON:
1522       button_data->image = gtk_image_new ();
1523       button_data->label = gtk_label_new (NULL);
1524       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1525       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1526       child = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
1527       gtk_box_pack_start (GTK_BOX (child), button_data->image, FALSE, FALSE, 0);
1528       gtk_box_pack_start (GTK_BOX (child), label_alignment, FALSE, FALSE, 0);
1529       break;
1530     case NORMAL_BUTTON:
1531     default:
1532       button_data->label = gtk_label_new (NULL);
1533       gtk_label_set_ellipsize (GTK_LABEL (button_data->label), PANGO_ELLIPSIZE_END);
1534       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1535       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1536       child = label_alignment;
1537       button_data->image = NULL;
1538     }
1539
1540   button_data->dir_name = g_strdup (dir_name);
1541   button_data->file = g_object_ref (file);
1542   button_data->file_is_hidden = file_is_hidden;
1543
1544   /* FIXME: Maybe we dont need this alignment at all and we can
1545    * use GtkMisc aligments or even GtkWidget:halign/valign center.
1546    *
1547    * The following function ensures that the alignment will always
1548    * request the same size whether the button's text is bold or not.
1549    */
1550   if (label_alignment)
1551     set_label_size_request (label_alignment, button_data);
1552
1553   gtk_container_add (GTK_CONTAINER (button_data->button), child);
1554   gtk_widget_show_all (button_data->button);
1555
1556   gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1557
1558   g_signal_connect (button_data->button, "clicked",
1559                     G_CALLBACK (button_clicked_cb),
1560                     button_data);
1561   g_object_weak_ref (G_OBJECT (button_data->button),
1562                      (GWeakNotify) button_data_free, button_data);
1563
1564   gtk_drag_source_set (button_data->button,
1565                        GDK_BUTTON1_MASK,
1566                        NULL, 0,
1567                        GDK_ACTION_COPY);
1568   gtk_drag_source_add_uri_targets (button_data->button);
1569   g_signal_connect (button_data->button, "drag-data-get",
1570                     G_CALLBACK (button_drag_data_get_cb), button_data);
1571
1572   return button_data;
1573 }
1574
1575 static gboolean
1576 gtk_path_bar_check_parent_path (GtkPathBar         *path_bar,
1577                                 GFile              *file,
1578                                 GtkFileSystem      *file_system)
1579 {
1580   GList *list;
1581   GList *current_path = NULL;
1582   gboolean need_new_fake_root = FALSE;
1583
1584   for (list = path_bar->button_list; list; list = list->next)
1585     {
1586       ButtonData *button_data;
1587
1588       button_data = list->data;
1589       if (g_file_equal (file, button_data->file))
1590         {
1591           current_path = list;
1592           break;
1593         }
1594       if (list == path_bar->fake_root)
1595         need_new_fake_root = TRUE;
1596     }
1597
1598   if (current_path)
1599     {
1600       if (need_new_fake_root)
1601         {
1602           path_bar->fake_root = NULL;
1603           for (list = current_path; list; list = list->next)
1604             {
1605               ButtonData *button_data;
1606
1607               button_data = list->data;
1608               if (BUTTON_IS_FAKE_ROOT (button_data))
1609                 {
1610                   path_bar->fake_root = list;
1611                   break;
1612                 }
1613             }
1614         }
1615
1616       for (list = path_bar->button_list; list; list = list->next)
1617         {
1618           gtk_path_bar_update_button_appearance (path_bar,
1619                                                  BUTTON_DATA (list->data),
1620                                                  (list == current_path) ? TRUE : FALSE);
1621         }
1622
1623       if (!gtk_widget_get_child_visible (BUTTON_DATA (current_path->data)->button))
1624         {
1625           path_bar->first_scrolled_button = current_path;
1626           gtk_widget_queue_resize (GTK_WIDGET (path_bar));
1627         }
1628
1629       return TRUE;
1630     }
1631   return FALSE;
1632 }
1633
1634
1635 struct SetFileInfo
1636 {
1637   GFile *file;
1638   GFile *parent_file;
1639   GtkPathBar *path_bar;
1640   GList *new_buttons;
1641   GList *fake_root;
1642   gboolean first_directory;
1643 };
1644
1645 static void
1646 gtk_path_bar_set_file_finish (struct SetFileInfo *info,
1647                               gboolean            result)
1648 {
1649   if (result)
1650     {
1651       GList *l;
1652
1653       gtk_path_bar_clear_buttons (info->path_bar);
1654       info->path_bar->button_list = g_list_reverse (info->new_buttons);
1655       info->path_bar->fake_root = info->fake_root;
1656
1657       for (l = info->path_bar->button_list; l; l = l->next)
1658         {
1659           GtkWidget *button = BUTTON_DATA (l->data)->button;
1660           gtk_container_add (GTK_CONTAINER (info->path_bar), button);
1661         }
1662     }
1663   else
1664     {
1665       GList *l;
1666
1667       for (l = info->new_buttons; l; l = l->next)
1668         {
1669           ButtonData *button_data;
1670
1671           button_data = BUTTON_DATA (l->data);
1672           gtk_widget_destroy (button_data->button);
1673         }
1674
1675       g_list_free (info->new_buttons);
1676     }
1677
1678   if (info->file)
1679     g_object_unref (info->file);
1680   if (info->parent_file)
1681     g_object_unref (info->parent_file);
1682   g_free (info);
1683 }
1684
1685 static void
1686 gtk_path_bar_get_info_callback (GCancellable *cancellable,
1687                                 GFileInfo    *info,
1688                                 const GError *error,
1689                                 gpointer      data)
1690 {
1691   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1692   struct SetFileInfo *file_info = data;
1693   ButtonData *button_data;
1694   const gchar *display_name;
1695   gboolean is_hidden;
1696
1697   if (cancellable != file_info->path_bar->get_info_cancellable)
1698     {
1699       gtk_path_bar_set_file_finish (file_info, FALSE);
1700       g_object_unref (cancellable);
1701       return;
1702     }
1703
1704   g_object_unref (cancellable);
1705   file_info->path_bar->get_info_cancellable = NULL;
1706
1707   if (cancelled || !info)
1708     {
1709       gtk_path_bar_set_file_finish (file_info, FALSE);
1710       return;
1711     }
1712
1713   display_name = g_file_info_get_display_name (info);
1714   is_hidden = g_file_info_get_is_hidden (info) || g_file_info_get_is_backup (info);
1715
1716   gtk_widget_push_composite_child ();
1717   button_data = make_directory_button (file_info->path_bar, display_name,
1718                                        file_info->file,
1719                                        file_info->first_directory, is_hidden);
1720   gtk_widget_pop_composite_child ();
1721   g_object_unref (file_info->file);
1722
1723   file_info->new_buttons = g_list_prepend (file_info->new_buttons, button_data);
1724
1725   if (BUTTON_IS_FAKE_ROOT (button_data))
1726     file_info->fake_root = file_info->new_buttons;
1727
1728   file_info->file = file_info->parent_file;
1729   file_info->first_directory = FALSE;
1730
1731   if (!file_info->file)
1732     {
1733       gtk_path_bar_set_file_finish (file_info, TRUE);
1734       return;
1735     }
1736
1737   file_info->parent_file = g_file_get_parent (file_info->file);
1738
1739   file_info->path_bar->get_info_cancellable =
1740     _gtk_file_system_get_info (file_info->path_bar->file_system,
1741                                file_info->file,
1742                                "standard::display-name,standard::is-hidden,standard::is-backup",
1743                                gtk_path_bar_get_info_callback,
1744                                file_info);
1745 }
1746
1747 gboolean
1748 _gtk_path_bar_set_file (GtkPathBar      *path_bar,
1749                         GFile           *file,
1750                         const gboolean   keep_trail,
1751                         GError         **error)
1752 {
1753   struct SetFileInfo *info;
1754
1755   g_return_val_if_fail (GTK_IS_PATH_BAR (path_bar), FALSE);
1756   g_return_val_if_fail (G_IS_FILE (file), FALSE);
1757
1758   /* Check whether the new path is already present in the pathbar as buttons.
1759    * This could be a parent directory or a previous selected subdirectory.
1760    */
1761   if (keep_trail &&
1762       gtk_path_bar_check_parent_path (path_bar, file, path_bar->file_system))
1763     return TRUE;
1764
1765   info = g_new0 (struct SetFileInfo, 1);
1766   info->file = g_object_ref (file);
1767   info->path_bar = path_bar;
1768   info->first_directory = TRUE;
1769   info->parent_file = g_file_get_parent (info->file);
1770
1771   if (path_bar->get_info_cancellable)
1772     g_cancellable_cancel (path_bar->get_info_cancellable);
1773
1774   path_bar->get_info_cancellable =
1775     _gtk_file_system_get_info (path_bar->file_system,
1776                                info->file,
1777                                "standard::display-name,standard::is-hidden,standard::is-backup",
1778                                gtk_path_bar_get_info_callback,
1779                                info);
1780
1781   return TRUE;
1782 }
1783
1784 /* FIXME: This should be a construct-only property */
1785 void
1786 _gtk_path_bar_set_file_system (GtkPathBar    *path_bar,
1787                                GtkFileSystem *file_system)
1788 {
1789   const char *home;
1790
1791   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1792
1793   g_assert (path_bar->file_system == NULL);
1794
1795   path_bar->file_system = g_object_ref (file_system);
1796
1797   home = g_get_home_dir ();
1798   if (home != NULL)
1799     {
1800       const gchar *desktop;
1801
1802       path_bar->home_file = g_file_new_for_path (home);
1803       /* FIXME: Need file system backend specific way of getting the
1804        * Desktop path.
1805        */
1806       desktop = g_get_user_special_dir (G_USER_DIRECTORY_DESKTOP);
1807       if (desktop != NULL)
1808         path_bar->desktop_file = g_file_new_for_path (desktop);
1809       else
1810         path_bar->desktop_file = NULL;
1811     }
1812   else
1813     {
1814       path_bar->home_file = NULL;
1815       path_bar->desktop_file = NULL;
1816     }
1817   path_bar->root_file = g_file_new_for_path ("/");
1818 }
1819
1820 /**
1821  * _gtk_path_bar_up:
1822  * @path_bar: a #GtkPathBar
1823  *
1824  * If the selected button in the pathbar is not the furthest button "up" (in the
1825  * root direction), act as if the user clicked on the next button up.
1826  **/
1827 void
1828 _gtk_path_bar_up (GtkPathBar *path_bar)
1829 {
1830   GList *l;
1831
1832   for (l = path_bar->button_list; l; l = l->next)
1833     {
1834       GtkWidget *button = BUTTON_DATA (l->data)->button;
1835       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1836         {
1837           if (l->next)
1838             {
1839               GtkWidget *next_button = BUTTON_DATA (l->next->data)->button;
1840               button_clicked_cb (next_button, l->next->data);
1841             }
1842           break;
1843         }
1844     }
1845 }
1846
1847 /**
1848  * _gtk_path_bar_down:
1849  * @path_bar: a #GtkPathBar
1850  *
1851  * If the selected button in the pathbar is not the furthest button "down" (in the
1852  * leaf direction), act as if the user clicked on the next button down.
1853  **/
1854 void
1855 _gtk_path_bar_down (GtkPathBar *path_bar)
1856 {
1857   GList *l;
1858
1859   for (l = path_bar->button_list; l; l = l->next)
1860     {
1861       GtkWidget *button = BUTTON_DATA (l->data)->button;
1862       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1863         {
1864           if (l->prev)
1865             {
1866               GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button;
1867               button_clicked_cb (prev_button, l->prev->data);
1868             }
1869           break;
1870         }
1871     }
1872 }