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_size_request             (GtkWidget        *widget,
  89                                                    GtkRequisition   *requisition);
  90 static void gtk_path_bar_map                      (GtkWidget        *widget);
  91 static void gtk_path_bar_unmap                    (GtkWidget        *widget);
  92 static void gtk_path_bar_size_allocate            (GtkWidget        *widget,
  93                                                    GtkAllocation    *allocation);
  94 static void gtk_path_bar_add                      (GtkContainer     *container,
  95                                                    GtkWidget        *widget);
  96 static void gtk_path_bar_remove                   (GtkContainer     *container,
  97                                                    GtkWidget        *widget);
  98 static void gtk_path_bar_forall                   (GtkContainer     *container,
  99                                                    gboolean          include_internals,
 100                                                    GtkCallback       callback,
 101                                                    gpointer          callback_data);
 102 static gboolean gtk_path_bar_scroll               (GtkWidget        *widget,
 103                                                    GdkEventScroll   *event);
 104 static void gtk_path_bar_scroll_up                (GtkPathBar       *path_bar);
 105 static void gtk_path_bar_scroll_down              (GtkPathBar       *path_bar);
 106 static void gtk_path_bar_stop_scrolling           (GtkPathBar       *path_bar);
 107 static gboolean gtk_path_bar_slider_up_defocus    (GtkWidget        *widget,
 108                                                    GdkEventButton   *event,
 109                                                    GtkPathBar       *path_bar);
 110 static gboolean gtk_path_bar_slider_down_defocus  (GtkWidget        *widget,
 111                                                    GdkEventButton   *event,
 112                                                    GtkPathBar       *path_bar);
 113 static gboolean gtk_path_bar_slider_button_press  (GtkWidget        *widget,
 114                                                    GdkEventButton   *event,
 115                                                    GtkPathBar       *path_bar);
 116 static gboolean gtk_path_bar_slider_button_release(GtkWidget        *widget,
 117                                                    GdkEventButton   *event,
 118                                                    GtkPathBar       *path_bar);
 119 static void gtk_path_bar_grab_notify              (GtkWidget        *widget,
 120                                                    gboolean          was_grabbed);
 121 static void gtk_path_bar_state_changed            (GtkWidget        *widget,
 122                                                    GtkStateType      previous_state);
 123 static void gtk_path_bar_style_set                (GtkWidget        *widget,
 124                                                    GtkStyle         *previous_style);
 125 static void gtk_path_bar_screen_changed           (GtkWidget        *widget,
 126                                                    GdkScreen        *previous_screen);
 127 static void gtk_path_bar_check_icon_theme         (GtkPathBar       *path_bar);
 128 static void gtk_path_bar_update_button_appearance (GtkPathBar       *path_bar,
 129                                                    ButtonData       *button_data,
 130                                                    gboolean          current_dir);
 131
 132 static void
 133 on_slider_unmap (GtkWidget  *widget,
 134                  GtkPathBar *path_bar)
 135 {
 136   if (path_bar->timer &&
 137       ((widget == path_bar->up_slider_button && path_bar->scrolling_up) ||
 138        (widget == path_bar->down_slider_button && path_bar->scrolling_down)))
 139     gtk_path_bar_stop_scrolling (path_bar);
 140 }
 141
 142 static GtkWidget *
 143 get_slider_button (GtkPathBar  *path_bar,
 144                    GtkArrowType arrow_type)
 145 {
 146   GtkWidget *button;
 147   AtkObject *atk_obj;
 148
 149   gtk_widget_push_composite_child ();
 150
 151   button = gtk_button_new ();
 152   atk_obj = gtk_widget_get_accessible (button);
 153   if (arrow_type == GTK_ARROW_LEFT)
 154     atk_object_set_name (atk_obj, _("Up Path"));
 155   else
 156     atk_object_set_name (atk_obj, _("Down Path"));
 157
 158   gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE);
 159   gtk_container_add (GTK_CONTAINER (button),
 160                      gtk_arrow_new (arrow_type, GTK_SHADOW_OUT));
 161   gtk_container_add (GTK_CONTAINER (path_bar), button);
 162   gtk_widget_show_all (button);
 163
 164   g_signal_connect (G_OBJECT (button), "unmap",
 165                     G_CALLBACK (on_slider_unmap), path_bar);
 166
 167   gtk_widget_pop_composite_child ();
 168
 169   return button;
 170 }
 171
 172 static void
 173 gtk_path_bar_init (GtkPathBar *path_bar)
 174 {
 175   gtk_widget_set_has_window (GTK_WIDGET (path_bar), FALSE);
 176   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (path_bar), FALSE);
 177
 178   path_bar->get_info_cancellable = NULL;
 179
 180   path_bar->spacing = 0;
 181   path_bar->up_slider_button = get_slider_button (path_bar, GTK_ARROW_LEFT);
 182   path_bar->down_slider_button = get_slider_button (path_bar, GTK_ARROW_RIGHT);
 183   path_bar->icon_size = FALLBACK_ICON_SIZE;
 184
 185   g_signal_connect_swapped (path_bar->up_slider_button, "clicked",
 186                             G_CALLBACK (gtk_path_bar_scroll_up), path_bar);
 187   g_signal_connect_swapped (path_bar->down_slider_button, "clicked",
 188                             G_CALLBACK (gtk_path_bar_scroll_down), path_bar);
 189
 190   g_signal_connect (path_bar->up_slider_button, "focus-out-event",
 191                     G_CALLBACK (gtk_path_bar_slider_up_defocus), path_bar);
 192   g_signal_connect (path_bar->down_slider_button, "focus-out-event",
 193                     G_CALLBACK (gtk_path_bar_slider_down_defocus), path_bar);
 194
 195   g_signal_connect (path_bar->up_slider_button, "button-press-event",
 196                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 197   g_signal_connect (path_bar->up_slider_button, "button-release-event",
 198                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 199   g_signal_connect (path_bar->down_slider_button, "button-press-event",
 200                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 201   g_signal_connect (path_bar->down_slider_button, "button-release-event",
 202                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 203 }
 204
 205 static void
 206 gtk_path_bar_class_init (GtkPathBarClass *path_bar_class)
 207 {
 208   GObjectClass *gobject_class;
 209   GtkWidgetClass *widget_class;
 210   GtkContainerClass *container_class;
 211
 212   gobject_class = (GObjectClass *) path_bar_class;
 213   widget_class = (GtkWidgetClass *) path_bar_class;
 214   container_class = (GtkContainerClass *) path_bar_class;
 215
 216   gobject_class->finalize = gtk_path_bar_finalize;
 217   gobject_class->dispose = gtk_path_bar_dispose;
 218
 219   widget_class->size_request = gtk_path_bar_size_request;
 220   widget_class->realize = gtk_path_bar_realize;
 221   widget_class->unrealize = gtk_path_bar_unrealize;
 222   widget_class->map = gtk_path_bar_map;
 223   widget_class->unmap = gtk_path_bar_unmap;
 224   widget_class->size_allocate = gtk_path_bar_size_allocate;
 225   widget_class->style_set = gtk_path_bar_style_set;
 226   widget_class->screen_changed = gtk_path_bar_screen_changed;
 227   widget_class->grab_notify = gtk_path_bar_grab_notify;
 228   widget_class->state_changed = gtk_path_bar_state_changed;
 229   widget_class->scroll_event = gtk_path_bar_scroll;
 230
 231   container_class->add = gtk_path_bar_add;
 232   container_class->forall = gtk_path_bar_forall;
 233   container_class->remove = gtk_path_bar_remove;
 234   gtk_container_class_handle_border_width (container_class);
 235   /* FIXME: */
 236   /*  container_class->child_type = gtk_path_bar_child_type;*/
 237
 238   path_bar_signals [PATH_CLICKED] =
 239     g_signal_new (I_("path-clicked"),
 240                   G_OBJECT_CLASS_TYPE (gobject_class),
 241                   G_SIGNAL_RUN_FIRST,
 242                   G_STRUCT_OFFSET (GtkPathBarClass, path_clicked),
 243                   NULL, NULL,
 244                   _gtk_marshal_VOID__POINTER_POINTER_BOOLEAN,
 245                   G_TYPE_NONE, 3,
 246                   G_TYPE_POINTER,
 247                   G_TYPE_POINTER,
 248                   G_TYPE_BOOLEAN);
 249 }
 250
 251
 252 static void
 253 gtk_path_bar_finalize (GObject *object)
 254 {
 255   GtkPathBar *path_bar;
 256
 257   path_bar = GTK_PATH_BAR (object);
 258
 259   gtk_path_bar_stop_scrolling (path_bar);
 260
 261   g_list_free (path_bar->button_list);
 262   if (path_bar->root_file)
 263     g_object_unref (path_bar->root_file);
 264   if (path_bar->home_file)
 265     g_object_unref (path_bar->home_file);
 266   if (path_bar->desktop_file)
 267     g_object_unref (path_bar->desktop_file);
 268
 269   if (path_bar->root_icon)
 270     g_object_unref (path_bar->root_icon);
 271   if (path_bar->home_icon)
 272     g_object_unref (path_bar->home_icon);
 273   if (path_bar->desktop_icon)
 274     g_object_unref (path_bar->desktop_icon);
 275
 276   if (path_bar->file_system)
 277     g_object_unref (path_bar->file_system);
 278
 279   G_OBJECT_CLASS (gtk_path_bar_parent_class)->finalize (object);
 280 }
 281
 282 /* Removes the settings signal handler.  It's safe to call multiple times */
 283 static void
 284 remove_settings_signal (GtkPathBar *path_bar,
 285                         GdkScreen  *screen)
 286 {
 287   if (path_bar->settings_signal_id)
 288     {
 289       GtkSettings *settings;
 290
 291       settings = gtk_settings_get_for_screen (screen);
 292       g_signal_handler_disconnect (settings,
 293                                    path_bar->settings_signal_id);
 294       path_bar->settings_signal_id = 0;
 295     }
 296 }
 297
 298 static void
 299 gtk_path_bar_dispose (GObject *object)
 300 {
 301   GtkPathBar *path_bar = GTK_PATH_BAR (object);
 302
 303   remove_settings_signal (path_bar, gtk_widget_get_screen (GTK_WIDGET (object)));
 304
 305   if (path_bar->get_info_cancellable)
 306     g_cancellable_cancel (path_bar->get_info_cancellable);
 307   path_bar->get_info_cancellable = NULL;
 308
 309   G_OBJECT_CLASS (gtk_path_bar_parent_class)->dispose (object);
 310 }
 311
 312 /* Size requisition:
 313  *
 314  * Ideally, our size is determined by another widget, and we are just filling
 315  * available space.
 316  */
 317 static void
 318 gtk_path_bar_size_request (GtkWidget      *widget,
 319                            GtkRequisition *requisition)
 320 {
 321   ButtonData *button_data;
 322   GtkPathBar *path_bar;
 323   GtkRequisition child_requisition;
 324   GList *list;
 325
 326   path_bar = GTK_PATH_BAR (widget);
 327
 328   requisition->width = 0;
 329   requisition->height = 0;
 330
 331   for (list = path_bar->button_list; list; list = list->next)
 332     {
 333       button_data = BUTTON_DATA (list->data);
 334       gtk_widget_get_preferred_size (button_data->button,
 335                                      &child_requisition, NULL);
 336
 337       if (button_data->type == NORMAL_BUTTON)
 338         /* Use 2*Height as button width because of ellipsized label.  */
 339         requisition->width = MAX (child_requisition.height * 2, requisition->width);
 340       else
 341         requisition->width = MAX (child_requisition.width, requisition->width);
 342
 343       requisition->height = MAX (child_requisition.height, requisition->height);
 344     }
 345
 346   /* Add space for slider, if we have more than one path */
 347   /* Theoretically, the slider could be bigger than the other button.  But we're
 348    * not going to worry about that now.
 349    */
 350   path_bar->slider_width = MIN(requisition->height * 2 / 3 + 5, requisition->height);
 351   if (path_bar->button_list && path_bar->button_list->next != NULL)
 352     requisition->width += (path_bar->spacing + path_bar->slider_width) * 2;
 353
 354   gtk_widget_get_preferred_size (path_bar->up_slider_button,
 355                                  &child_requisition, NULL);
 356   gtk_widget_get_preferred_size (path_bar->down_slider_button,
 357                                  &child_requisition, NULL);
 358 }
 359
 360 static void
 361 gtk_path_bar_update_slider_buttons (GtkPathBar *path_bar)
 362 {
 363   if (path_bar->button_list)
 364     {
 365       GtkWidget *button;
 366
 367       button = BUTTON_DATA (path_bar->button_list->data)->button;
 368       if (gtk_widget_get_child_visible (button))
 369         {
 370           gtk_path_bar_stop_scrolling (path_bar);
 371           gtk_widget_set_sensitive (path_bar->down_slider_button, FALSE);
 372         }
 373       else
 374         gtk_widget_set_sensitive (path_bar->down_slider_button, TRUE);
 375
 376       button = BUTTON_DATA (g_list_last (path_bar->button_list)->data)->button;
 377       if (gtk_widget_get_child_visible (button))
 378         {
 379           gtk_path_bar_stop_scrolling (path_bar);
 380           gtk_widget_set_sensitive (path_bar->up_slider_button, FALSE);
 381         }
 382       else
 383         gtk_widget_set_sensitive (path_bar->up_slider_button, TRUE);
 384     }
 385 }
 386
 387 static void
 388 gtk_path_bar_map (GtkWidget *widget)
 389 {
 390   gdk_window_show (GTK_PATH_BAR (widget)->event_window);
 391
 392   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->map (widget);
 393 }
 394
 395 static void
 396 gtk_path_bar_unmap (GtkWidget *widget)
 397 {
 398   gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 399   gdk_window_hide (GTK_PATH_BAR (widget)->event_window);
 400
 401   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unmap (widget);
 402 }
 403
 404 static void
 405 gtk_path_bar_realize (GtkWidget *widget)
 406 {
 407   GtkPathBar *path_bar;
 408   GtkAllocation allocation;
 409   GdkWindow *window;
 410   GdkWindowAttr attributes;
 411   gint attributes_mask;
 412
 413   gtk_widget_set_realized (widget, TRUE);
 414
 415   path_bar = GTK_PATH_BAR (widget);
 416   window = gtk_widget_get_parent_window (widget);
 417   gtk_widget_set_window (widget, window);
 418   g_object_ref (window);
 419
 420   gtk_widget_get_allocation (widget, &allocation);
 421
 422   attributes.window_type = GDK_WINDOW_CHILD;
 423   attributes.x = allocation.x;
 424   attributes.y = allocation.y;
 425   attributes.width = allocation.width;
 426   attributes.height = allocation.height;
 427   attributes.wclass = GDK_INPUT_ONLY;
 428   attributes.event_mask = gtk_widget_get_events (widget);
 429   attributes.event_mask |= GDK_SCROLL_MASK;
 430   attributes_mask = GDK_WA_X | GDK_WA_Y;
 431
 432   path_bar->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
 433                                            &attributes, attributes_mask);
 434   gdk_window_set_user_data (path_bar->event_window, widget);
 435
 436   gtk_widget_style_attach (widget);
 437 }
 438
 439 static void
 440 gtk_path_bar_unrealize (GtkWidget *widget)
 441 {
 442   GtkPathBar *path_bar;
 443
 444   path_bar = GTK_PATH_BAR (widget);
 445
 446   gdk_window_set_user_data (path_bar->event_window, NULL);
 447   gdk_window_destroy (path_bar->event_window);
 448   path_bar->event_window = NULL;
 449
 450   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unrealize (widget);
 451 }
 452
 453 /* This is a tad complicated
 454  */
 455 static void
 456 gtk_path_bar_size_allocate (GtkWidget     *widget,
 457                             GtkAllocation *allocation)
 458 {
 459   GtkWidget *child;
 460   GtkPathBar *path_bar = GTK_PATH_BAR (widget);
 461   GtkTextDirection direction;
 462   GtkAllocation child_allocation;
 463   GList *list, *first_button;
 464   gint width;
 465   gint allocation_width;
 466   gboolean need_sliders = FALSE;
 467   gint up_slider_offset = 0;
 468   GtkRequisition child_requisition;
 469
 470   gtk_widget_set_allocation (widget, allocation);
 471
 472   if (gtk_widget_get_realized (widget))
 473     gdk_window_move_resize (path_bar->event_window,
 474                             allocation->x, allocation->y,
 475                             allocation->width, allocation->height);
 476
 477   /* No path is set; we don't have to allocate anything. */
 478   if (path_bar->button_list == NULL)
 479     return;
 480
 481   direction = gtk_widget_get_direction (widget);
 482   allocation_width = allocation->width;
 483
 484   /* First, we check to see if we need the scrollbars. */
 485   if (path_bar->fake_root)
 486     width = path_bar->spacing + path_bar->slider_width;
 487   else
 488     width = 0;
 489
 490   for (list = path_bar->button_list; list; list = list->next)
 491     {
 492       child = BUTTON_DATA (list->data)->button;
 493
 494       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 495
 496       width += child_requisition.width + path_bar->spacing;
 497       if (list == path_bar->fake_root)
 498         break;
 499     }
 500
 501   if (width <= allocation_width)
 502     {
 503       if (path_bar->fake_root)
 504         first_button = path_bar->fake_root;
 505       else
 506         first_button = g_list_last (path_bar->button_list);
 507     }
 508   else
 509     {
 510       gboolean reached_end = FALSE;
 511       gint slider_space = 2 * (path_bar->spacing + path_bar->slider_width);
 512
 513       if (path_bar->first_scrolled_button)
 514         first_button = path_bar->first_scrolled_button;
 515       else
 516         first_button = path_bar->button_list;
 517       need_sliders = TRUE;
 518
 519       /* To see how much space we have, and how many buttons we can display.
 520        * We start at the first button, count forward until hit the new
 521        * button, then count backwards.
 522        */
 523       /* Count down the path chain towards the end. */
 524       gtk_widget_get_preferred_size (BUTTON_DATA (first_button->data)->button,
 525                                      &child_requisition, NULL);
 526
 527       width = child_requisition.width;
 528       list = first_button->prev;
 529       while (list && !reached_end)
 530         {
 531           child = BUTTON_DATA (list->data)->button;
 532
 533           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 534
 535           if (width + child_requisition.width +
 536               path_bar->spacing + slider_space > allocation_width)
 537             reached_end = TRUE;
 538           else if (list == path_bar->fake_root)
 539             break;
 540           else
 541             width += child_requisition.width + path_bar->spacing;
 542
 543           list = list->prev;
 544         }
 545
 546       /* Finally, we walk up, seeing how many of the previous buttons we can
 547        * add */
 548       while (first_button->next && !reached_end)
 549         {
 550           child = BUTTON_DATA (first_button->next->data)->button;
 551
 552           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 553
 554           if (width + child_requisition.width + path_bar->spacing + slider_space > allocation_width)
 555             {
 556               reached_end = TRUE;
 557             }
 558           else
 559             {
 560               width += child_requisition.width + path_bar->spacing;
 561               if (first_button == path_bar->fake_root)
 562                 break;
 563               first_button = first_button->next;
 564             }
 565         }
 566     }
 567
 568   /* Now, we allocate space to the buttons */
 569   child_allocation.y = allocation->y;
 570   child_allocation.height = allocation->height;
 571
 572   if (direction == GTK_TEXT_DIR_RTL)
 573     {
 574       child_allocation.x = allocation->x + allocation->width;
 575       if (need_sliders || path_bar->fake_root)
 576         {
 577           child_allocation.x -= (path_bar->spacing + path_bar->slider_width);
 578           up_slider_offset = allocation->width - path_bar->slider_width;
 579         }
 580     }
 581   else
 582     {
 583       child_allocation.x = allocation->x;
 584       if (need_sliders || path_bar->fake_root)
 585         {
 586           up_slider_offset = 0;
 587           child_allocation.x += (path_bar->spacing + path_bar->slider_width);
 588         }
 589     }
 590
 591   for (list = first_button; list; list = list->prev)
 592     {
 593       GtkAllocation widget_allocation;
 594       ButtonData *button_data;
 595
 596       button_data = BUTTON_DATA (list->data);
 597       child = button_data->button;
 598
 599       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 600
 601       child_allocation.width = MIN (child_requisition.width,
 602                                     allocation_width - (path_bar->spacing + path_bar->slider_width) * 2);
 603
 604       if (direction == GTK_TEXT_DIR_RTL)
 605         child_allocation.x -= child_allocation.width;
 606
 607       /* Check to see if we've don't have any more space to allocate buttons */
 608       if (need_sliders && direction == GTK_TEXT_DIR_RTL)
 609         {
 610           gtk_widget_get_allocation (widget, &widget_allocation);
 611           if (child_allocation.x - path_bar->spacing - path_bar->slider_width < widget_allocation.x)
 612             break;
 613         }
 614       else if (need_sliders && direction == GTK_TEXT_DIR_LTR)
 615         {
 616           gtk_widget_get_allocation (widget, &widget_allocation);
 617           if (child_allocation.x + child_allocation.width + path_bar->spacing + path_bar->slider_width >
 618               widget_allocation.x + allocation_width)
 619             break;
 620         }
 621
 622       if (child_allocation.width < child_requisition.width)
 623         {
 624           if (!gtk_widget_get_has_tooltip (child))
 625             gtk_widget_set_tooltip_text (child, button_data->dir_name);
 626         }
 627       else if (gtk_widget_get_has_tooltip (child))
 628         gtk_widget_set_tooltip_text (child, NULL);
 629
 630       gtk_widget_set_child_visible (child, TRUE);
 631       gtk_widget_size_allocate (child, &child_allocation);
 632
 633       if (direction == GTK_TEXT_DIR_RTL)
 634         child_allocation.x -= path_bar->spacing;
 635       else
 636         child_allocation.x += child_allocation.width + path_bar->spacing;
 637     }
 638   /* Now we go hide all the widgets that don't fit */
 639   while (list)
 640     {
 641       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 642       list = list->prev;
 643     }
 644   for (list = first_button->next; list; list = list->next)
 645     {
 646       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 647     }
 648
 649   if (need_sliders || path_bar->fake_root)
 650     {
 651       child_allocation.width = path_bar->slider_width;
 652       child_allocation.x = up_slider_offset + allocation->x;
 653       gtk_widget_size_allocate (path_bar->up_slider_button, &child_allocation);
 654
 655       gtk_widget_set_child_visible (path_bar->up_slider_button, TRUE);
 656       gtk_widget_show_all (path_bar->up_slider_button);
 657     }
 658   else
 659     gtk_widget_set_child_visible (path_bar->up_slider_button, FALSE);
 660
 661   if (need_sliders)
 662     {
 663       child_allocation.width = path_bar->slider_width;
 664
 665       if (direction == GTK_TEXT_DIR_RTL)
 666         child_allocation.x = 0;
 667       else
 668         child_allocation.x = allocation->width - path_bar->slider_width;
 669
 670       child_allocation.x += allocation->x;
 671
 672       gtk_widget_size_allocate (path_bar->down_slider_button, &child_allocation);
 673
 674       gtk_widget_set_child_visible (path_bar->down_slider_button, TRUE);
 675       gtk_widget_show_all (path_bar->down_slider_button);
 676       gtk_path_bar_update_slider_buttons (path_bar);
 677     }
 678   else
 679     gtk_widget_set_child_visible (path_bar->down_slider_button, FALSE);
 680 }
 681
 682 static void
 683 gtk_path_bar_style_set (GtkWidget *widget,
 684                         GtkStyle  *previous_style)
 685 {
 686   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_set (widget, previous_style);
 687
 688   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 689 }
 690
 691 static void
 692 gtk_path_bar_screen_changed (GtkWidget *widget,
 693                              GdkScreen *previous_screen)
 694 {
 695   if (GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed)
 696     GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed (widget, previous_screen);
 697
 698   /* We might nave a new settings, so we remove the old one */
 699   if (previous_screen)
 700     remove_settings_signal (GTK_PATH_BAR (widget), previous_screen);
 701
 702   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 703 }
 704
 705 static gboolean
 706 gtk_path_bar_scroll (GtkWidget      *widget,
 707                      GdkEventScroll *event)
 708 {
 709   switch (event->direction)
 710     {
 711     case GDK_SCROLL_RIGHT:
 712     case GDK_SCROLL_DOWN:
 713       gtk_path_bar_scroll_down (GTK_PATH_BAR (widget));
 714       break;
 715     case GDK_SCROLL_LEFT:
 716     case GDK_SCROLL_UP:
 717       gtk_path_bar_scroll_up (GTK_PATH_BAR (widget));
 718       break;
 719     }
 720
 721   return TRUE;
 722 }
 723
 724 static void
 725 gtk_path_bar_add (GtkContainer *container,
 726                   GtkWidget    *widget)
 727 {
 728   gtk_widget_set_parent (widget, GTK_WIDGET (container));
 729 }
 730
 731 static void
 732 gtk_path_bar_remove_1 (GtkContainer *container,
 733                        GtkWidget    *widget)
 734 {
 735   gboolean was_visible = gtk_widget_get_visible (widget);
 736   gtk_widget_unparent (widget);
 737   if (was_visible)
 738     gtk_widget_queue_resize (GTK_WIDGET (container));
 739 }
 740
 741 static void
 742 gtk_path_bar_remove (GtkContainer *container,
 743                      GtkWidget    *widget)
 744 {
 745   GtkPathBar *path_bar;
 746   GList *children;
 747
 748   path_bar = GTK_PATH_BAR (container);
 749
 750   if (widget == path_bar->up_slider_button)
 751     {
 752       gtk_path_bar_remove_1 (container, widget);
 753       path_bar->up_slider_button = NULL;
 754       return;
 755     }
 756
 757   if (widget == path_bar->down_slider_button)
 758     {
 759       gtk_path_bar_remove_1 (container, widget);
 760       path_bar->down_slider_button = NULL;
 761       return;
 762     }
 763
 764   children = path_bar->button_list;
 765   while (children)
 766     {
 767       if (widget == BUTTON_DATA (children->data)->button)
 768         {
 769           gtk_path_bar_remove_1 (container, widget);
 770           path_bar->button_list = g_list_remove_link (path_bar->button_list, children);
 771           g_list_free (children);
 772           return;
 773         }
 774
 775       children = children->next;
 776     }
 777 }
 778
 779 static void
 780 gtk_path_bar_forall (GtkContainer *container,
 781                      gboolean      include_internals,
 782                      GtkCallback   callback,
 783                      gpointer      callback_data)
 784 {
 785   GtkPathBar *path_bar;
 786   GList *children;
 787
 788   g_return_if_fail (callback != NULL);
 789   path_bar = GTK_PATH_BAR (container);
 790
 791   children = path_bar->button_list;
 792   while (children)
 793     {
 794       GtkWidget *child;
 795       child = BUTTON_DATA (children->data)->button;
 796       children = children->next;
 797
 798       (* callback) (child, callback_data);
 799     }
 800
 801   if (path_bar->up_slider_button)
 802     (* callback) (path_bar->up_slider_button, callback_data);
 803
 804   if (path_bar->down_slider_button)
 805     (* callback) (path_bar->down_slider_button, callback_data);
 806 }
 807
 808 static void
 809 gtk_path_bar_scroll_down (GtkPathBar *path_bar)
 810 {
 811   GtkAllocation allocation, button_allocation;
 812   GList *list;
 813   GList *down_button = NULL;
 814   gint space_available;
 815
 816   if (path_bar->ignore_click)
 817     {
 818       path_bar->ignore_click = FALSE;
 819       return;
 820     }
 821
 822   if (gtk_widget_get_child_visible (BUTTON_DATA (path_bar->button_list->data)->button))
 823     {
 824       /* Return if the last button is already visible */
 825       return;
 826     }
 827
 828   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 829
 830   /* We find the button at the 'down' end that we have to make
 831    * visible */
 832   for (list = path_bar->button_list; list; list = list->next)
 833     {
 834       if (list->next && gtk_widget_get_child_visible (BUTTON_DATA (list->next->data)->button))
 835         {
 836           down_button = list;
 837           break;
 838         }
 839     }
 840
 841   gtk_widget_get_allocation (GTK_WIDGET (path_bar), &allocation);
 842   gtk_widget_get_allocation (BUTTON_DATA (down_button->data)->button, &button_allocation);
 843
 844   space_available = (allocation.width
 845                      - 2 * path_bar->spacing - 2 * path_bar->slider_width
 846                      - button_allocation.width);
 847   path_bar->first_scrolled_button = down_button;
 848
 849   /* We have space_available free space that's not being used.
 850    * So we walk down from the end, adding buttons until we use all free space.
 851    */
 852   while (space_available > 0)
 853     {
 854       path_bar->first_scrolled_button = down_button;
 855       down_button = down_button->next;
 856       if (!down_button)
 857         break;
 858       space_available -= (button_allocation.width
 859                           + path_bar->spacing);
 860     }
 861 }
 862
 863 static void
 864 gtk_path_bar_scroll_up (GtkPathBar *path_bar)
 865 {
 866   GList *list;
 867
 868   if (path_bar->ignore_click)
 869     {
 870       path_bar->ignore_click = FALSE;
 871       return;
 872     }
 873
 874   list = g_list_last (path_bar->button_list);
 875
 876   if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
 877     {
 878       /* Return if the first button is already visible */
 879       return;
 880     }
 881
 882   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 883
 884   for ( ; list; list = list->prev)
 885     {
 886       if (list->prev && gtk_widget_get_child_visible (BUTTON_DATA (list->prev->data)->button))
 887         {
 888           if (list->prev == path_bar->fake_root)
 889             path_bar->fake_root = NULL;
 890           path_bar->first_scrolled_button = list;
 891           return;
 892         }
 893     }
 894 }
 895
 896 static gboolean
 897 gtk_path_bar_scroll_timeout (GtkPathBar *path_bar)
 898 {
 899   gboolean retval = FALSE;
 900
 901   if (path_bar->timer)
 902     {
 903       if (path_bar->scrolling_up)
 904         gtk_path_bar_scroll_up (path_bar);
 905       else if (path_bar->scrolling_down)
 906         gtk_path_bar_scroll_down (path_bar);
 907
 908       if (path_bar->need_timer)
 909         {
 910           GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (path_bar));
 911           guint        timeout;
 912
 913           g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
 914
 915           path_bar->need_timer = FALSE;
 916
 917           path_bar->timer = gdk_threads_add_timeout (timeout * SCROLL_DELAY_FACTOR,
 918                                            (GSourceFunc)gtk_path_bar_scroll_timeout,
 919                                            path_bar);
 920         }
 921       else
 922         retval = TRUE;
 923     }
 924
 925   return retval;
 926 }
 927
 928 static void
 929 gtk_path_bar_stop_scrolling (GtkPathBar *path_bar)
 930 {
 931   if (path_bar->timer)
 932     {
 933       g_source_remove (path_bar->timer);
 934       path_bar->timer = 0;
 935       path_bar->need_timer = FALSE;
 936     }
 937 }
 938
 939 static gboolean
 940 gtk_path_bar_slider_up_defocus (GtkWidget      *widget,
 941                                     GdkEventButton *event,
 942                                     GtkPathBar     *path_bar)
 943 {
 944   GList *list;
 945   GList *up_button = NULL;
 946
 947   if (event->type != GDK_FOCUS_CHANGE)
 948     return FALSE;
 949
 950   for (list = g_list_last (path_bar->button_list); list; list = list->prev)
 951     {
 952       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
 953         {
 954           up_button = list;
 955           break;
 956         }
 957     }
 958
 959   /* don't let the focus vanish */
 960   if ((!gtk_widget_is_sensitive (path_bar->up_slider_button)) ||
 961       (!gtk_widget_get_child_visible (path_bar->up_slider_button)))
 962     gtk_widget_grab_focus (BUTTON_DATA (up_button->data)->button);
 963
 964   return FALSE;
 965 }
 966
 967 static gboolean
 968 gtk_path_bar_slider_down_defocus (GtkWidget      *widget,
 969                                     GdkEventButton *event,
 970                                     GtkPathBar     *path_bar)
 971 {
 972   GList *list;
 973   GList *down_button = NULL;
 974
 975   if (event->type != GDK_FOCUS_CHANGE)
 976     return FALSE;
 977
 978   for (list = path_bar->button_list; list; list = list->next)
 979     {
 980       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
 981         {
 982           down_button = list;
 983           break;
 984         }
 985     }
 986
 987   /* don't let the focus vanish */
 988   if ((!gtk_widget_is_sensitive (path_bar->down_slider_button)) ||
 989       (!gtk_widget_get_child_visible (path_bar->down_slider_button)))
 990     gtk_widget_grab_focus (BUTTON_DATA (down_button->data)->button);
 991
 992   return FALSE;
 993 }
 994
 995 static gboolean
 996 gtk_path_bar_slider_button_press (GtkWidget      *widget,
 997                                   GdkEventButton *event,
 998                                   GtkPathBar     *path_bar)
 999 {
1000   if (event->type != GDK_BUTTON_PRESS || event->button != 1)
1001     return FALSE;
1002
1003   path_bar->ignore_click = FALSE;
1004
1005   if (widget == path_bar->up_slider_button)
1006     {
1007       path_bar->scrolling_down = FALSE;
1008       path_bar->scrolling_up = TRUE;
1009       gtk_path_bar_scroll_up (path_bar);
1010     }
1011   else if (widget == path_bar->down_slider_button)
1012     {
1013       path_bar->scrolling_up = FALSE;
1014       path_bar->scrolling_down = TRUE;
1015       gtk_path_bar_scroll_down (path_bar);
1016     }
1017
1018   if (!path_bar->timer)
1019     {
1020       GtkSettings *settings = gtk_widget_get_settings (widget);
1021       guint        timeout;
1022
1023       g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
1024
1025       path_bar->need_timer = TRUE;
1026       path_bar->timer = gdk_threads_add_timeout (timeout,
1027                                        (GSourceFunc)gtk_path_bar_scroll_timeout,
1028                                        path_bar);
1029     }
1030
1031   return FALSE;
1032 }
1033
1034 static gboolean
1035 gtk_path_bar_slider_button_release (GtkWidget      *widget,
1036                                     GdkEventButton *event,
1037                                     GtkPathBar     *path_bar)
1038 {
1039   if (event->type != GDK_BUTTON_RELEASE)
1040     return FALSE;
1041
1042   path_bar->ignore_click = TRUE;
1043   gtk_path_bar_stop_scrolling (path_bar);
1044
1045   return FALSE;
1046 }
1047
1048 static void
1049 gtk_path_bar_grab_notify (GtkWidget *widget,
1050                           gboolean   was_grabbed)
1051 {
1052   if (!was_grabbed)
1053     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1054 }
1055
1056 static void
1057 gtk_path_bar_state_changed (GtkWidget    *widget,
1058                             GtkStateType  previous_state)
1059 {
1060   if (!gtk_widget_is_sensitive (widget))
1061     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1062 }
1063
1064
1065 /* Changes the icons wherever it is needed */
1066 static void
1067 reload_icons (GtkPathBar *path_bar)
1068 {
1069   GList *list;
1070
1071   if (path_bar->root_icon)
1072     {
1073       g_object_unref (path_bar->root_icon);
1074       path_bar->root_icon = NULL;
1075     }
1076   if (path_bar->home_icon)
1077     {
1078       g_object_unref (path_bar->home_icon);
1079       path_bar->home_icon = NULL;
1080     }
1081   if (path_bar->desktop_icon)
1082     {
1083       g_object_unref (path_bar->desktop_icon);
1084       path_bar->desktop_icon = NULL;
1085     }
1086
1087   for (list = path_bar->button_list; list; list = list->next)
1088     {
1089       ButtonData *button_data;
1090       gboolean current_dir;
1091
1092       button_data = BUTTON_DATA (list->data);
1093       if (button_data->type != NORMAL_BUTTON)
1094         {
1095           current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button));
1096           gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1097         }
1098     }
1099
1100 }
1101
1102 static void
1103 change_icon_theme (GtkPathBar *path_bar)
1104 {
1105   GtkSettings *settings;
1106   gint width, height;
1107
1108   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1109
1110   if (gtk_icon_size_lookup_for_settings (settings, GTK_ICON_SIZE_MENU, &width, &height))
1111     path_bar->icon_size = MAX (width, height);
1112   else
1113     path_bar->icon_size = FALLBACK_ICON_SIZE;
1114
1115   reload_icons (path_bar);
1116 }
1117 /* Callback used when a GtkSettings value changes */
1118 static void
1119 settings_notify_cb (GObject    *object,
1120                     GParamSpec *pspec,
1121                     GtkPathBar *path_bar)
1122 {
1123   const char *name;
1124
1125   name = g_param_spec_get_name (pspec);
1126
1127   if (! strcmp (name, "gtk-icon-theme-name") ||
1128       ! strcmp (name, "gtk-icon-sizes"))
1129     change_icon_theme (path_bar);
1130 }
1131
1132 static void
1133 gtk_path_bar_check_icon_theme (GtkPathBar *path_bar)
1134 {
1135   GtkSettings *settings;
1136
1137   if (path_bar->settings_signal_id)
1138     return;
1139
1140   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1141   path_bar->settings_signal_id = g_signal_connect (settings, "notify", G_CALLBACK (settings_notify_cb), path_bar);
1142
1143   change_icon_theme (path_bar);
1144 }
1145
1146 /* Public functions and their helpers */
1147 static void
1148 gtk_path_bar_clear_buttons (GtkPathBar *path_bar)
1149 {
1150   while (path_bar->button_list != NULL)
1151     {
1152       gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (path_bar->button_list->data)->button);
1153     }
1154   path_bar->first_scrolled_button = NULL;
1155   path_bar->fake_root = NULL;
1156 }
1157
1158 static void
1159 button_clicked_cb (GtkWidget *button,
1160                    gpointer   data)
1161 {
1162   ButtonData *button_data;
1163   GtkPathBar *path_bar;
1164   GList *button_list;
1165   gboolean child_is_hidden;
1166   GFile *child_file;
1167
1168   button_data = BUTTON_DATA (data);
1169   if (button_data->ignore_changes)
1170     return;
1171
1172   path_bar = GTK_PATH_BAR (gtk_widget_get_parent (button));
1173
1174   button_list = g_list_find (path_bar->button_list, button_data);
1175   g_assert (button_list != NULL);
1176
1177   g_signal_handlers_block_by_func (button,
1178                                    G_CALLBACK (button_clicked_cb), data);
1179   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
1180   g_signal_handlers_unblock_by_func (button,
1181                                      G_CALLBACK (button_clicked_cb), data);
1182
1183   if (button_list->prev)
1184     {
1185       ButtonData *child_data;
1186
1187       child_data = BUTTON_DATA (button_list->prev->data);
1188       child_file = child_data->file;
1189       child_is_hidden = child_data->file_is_hidden;
1190     }
1191   else
1192     {
1193       child_file = NULL;
1194       child_is_hidden = FALSE;
1195     }
1196
1197   g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0,
1198                  button_data->file, child_file, child_is_hidden);
1199 }
1200
1201 struct SetButtonImageData
1202 {
1203   GtkPathBar *path_bar;
1204   ButtonData *button_data;
1205 };
1206
1207 static void
1208 set_button_image_get_info_cb (GCancellable *cancellable,
1209                               GFileInfo    *info,
1210                               const GError *error,
1211                               gpointer      user_data)
1212 {
1213   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1214   GdkPixbuf *pixbuf;
1215   struct SetButtonImageData *data = user_data;
1216
1217   if (cancellable != data->button_data->cancellable)
1218     goto out;
1219
1220   data->button_data->cancellable = NULL;
1221
1222   if (!data->button_data->button)
1223     {
1224       g_free (data->button_data);
1225       goto out;
1226     }
1227
1228   if (cancelled || error)
1229     goto out;
1230
1231   pixbuf = _gtk_file_info_render_icon (info, GTK_WIDGET (data->path_bar),
1232                                        data->path_bar->icon_size);
1233   gtk_image_set_from_pixbuf (GTK_IMAGE (data->button_data->image), pixbuf);
1234
1235   switch (data->button_data->type)
1236     {
1237       case HOME_BUTTON:
1238         if (data->path_bar->home_icon)
1239           g_object_unref (pixbuf);
1240         else
1241           data->path_bar->home_icon = pixbuf;
1242         break;
1243
1244       case DESKTOP_BUTTON:
1245         if (data->path_bar->desktop_icon)
1246           g_object_unref (pixbuf);
1247         else
1248           data->path_bar->desktop_icon = pixbuf;
1249         break;
1250
1251       default:
1252         break;
1253     };
1254
1255 out:
1256   g_free (data);
1257   g_object_unref (cancellable);
1258 }
1259
1260 static void
1261 set_button_image (GtkPathBar *path_bar,
1262                   ButtonData *button_data)
1263 {
1264   GtkFileSystemVolume *volume;
1265   struct SetButtonImageData *data;
1266
1267   switch (button_data->type)
1268     {
1269     case ROOT_BUTTON:
1270
1271       if (path_bar->root_icon != NULL)
1272         {
1273           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1274           break;
1275         }
1276
1277       volume = _gtk_file_system_get_volume_for_file (path_bar->file_system, path_bar->root_file);
1278       if (volume == NULL)
1279         return;
1280
1281       path_bar->root_icon = _gtk_file_system_volume_render_icon (volume,
1282                                                                  GTK_WIDGET (path_bar),
1283                                                                  path_bar->icon_size,
1284                                                                  NULL);
1285       _gtk_file_system_volume_unref (volume);
1286
1287       gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1288       break;
1289
1290     case HOME_BUTTON:
1291       if (path_bar->home_icon != NULL)
1292         {
1293           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->home_icon);
1294           break;
1295         }
1296
1297       data = g_new0 (struct SetButtonImageData, 1);
1298       data->path_bar = path_bar;
1299       data->button_data = button_data;
1300
1301       if (button_data->cancellable)
1302         g_cancellable_cancel (button_data->cancellable);
1303
1304       button_data->cancellable =
1305         _gtk_file_system_get_info (path_bar->file_system,
1306                                    path_bar->home_file,
1307                                    "standard::icon",
1308                                    set_button_image_get_info_cb,
1309                                    data);
1310       break;
1311
1312     case DESKTOP_BUTTON:
1313       if (path_bar->desktop_icon != NULL)
1314         {
1315           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->desktop_icon);
1316           break;
1317         }
1318
1319       data = g_new0 (struct SetButtonImageData, 1);
1320       data->path_bar = path_bar;
1321       data->button_data = button_data;
1322
1323       if (button_data->cancellable)
1324         g_cancellable_cancel (button_data->cancellable);
1325
1326       button_data->cancellable =
1327         _gtk_file_system_get_info (path_bar->file_system,
1328                                    path_bar->desktop_file,
1329                                    "standard::icon",
1330                                    set_button_image_get_info_cb,
1331                                    data);
1332       break;
1333     default:
1334       break;
1335     }
1336 }
1337
1338 static void
1339 button_data_free (ButtonData *button_data)
1340 {
1341   if (button_data->file)
1342     g_object_unref (button_data->file);
1343   button_data->file = NULL;
1344
1345   g_free (button_data->dir_name);
1346   button_data->dir_name = NULL;
1347
1348   button_data->button = NULL;
1349
1350   if (button_data->cancellable)
1351     g_cancellable_cancel (button_data->cancellable);
1352   else
1353     g_free (button_data);
1354 }
1355
1356 static const char *
1357 get_dir_name (ButtonData *button_data)
1358 {
1359   return button_data->dir_name;
1360 }
1361
1362 /* We always want to request the same size for the label, whether
1363  * or not the contents are bold
1364  */
1365 static void
1366 label_size_request_cb (GtkWidget      *widget,
1367                        GtkRequisition *requisition,
1368                        ButtonData     *button_data)
1369 {
1370   const gchar *dir_name = get_dir_name (button_data);
1371   PangoLayout *layout = gtk_widget_create_pango_layout (button_data->label, dir_name);
1372   gint bold_width, bold_height;
1373   gchar *markup;
1374
1375   pango_layout_get_pixel_size (layout, &requisition->width, &requisition->height);
1376
1377   markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1378   pango_layout_set_markup (layout, markup, -1);
1379   g_free (markup);
1380
1381   pango_layout_get_pixel_size (layout, &bold_width, &bold_height);
1382   requisition->width = MAX (requisition->width, bold_width);
1383   requisition->height = MAX (requisition->height, bold_height);
1384
1385   g_object_unref (layout);
1386 }
1387
1388 static void
1389 gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
1390                                        ButtonData *button_data,
1391                                        gboolean    current_dir)
1392 {
1393   const gchar *dir_name = get_dir_name (button_data);
1394
1395   if (button_data->label != NULL)
1396     {
1397       if (current_dir)
1398         {
1399           char *markup;
1400
1401           markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1402           gtk_label_set_markup (GTK_LABEL (button_data->label), markup);
1403           g_free (markup);
1404         }
1405       else
1406         {
1407           gtk_label_set_text (GTK_LABEL (button_data->label), dir_name);
1408         }
1409     }
1410
1411   if (button_data->image != NULL)
1412     {
1413       set_button_image (path_bar, button_data);
1414     }
1415
1416   if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir)
1417     {
1418       button_data->ignore_changes = TRUE;
1419       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir);
1420       button_data->ignore_changes = FALSE;
1421     }
1422 }
1423
1424 static ButtonType
1425 find_button_type (GtkPathBar  *path_bar,
1426                   GFile       *file)
1427 {
1428   if (path_bar->root_file != NULL &&
1429       g_file_equal (file, path_bar->root_file))
1430     return ROOT_BUTTON;
1431   if (path_bar->home_file != NULL &&
1432       g_file_equal (file, path_bar->home_file))
1433     return HOME_BUTTON;
1434   if (path_bar->desktop_file != NULL &&
1435       g_file_equal (file, path_bar->desktop_file))
1436     return DESKTOP_BUTTON;
1437
1438  return NORMAL_BUTTON;
1439 }
1440
1441 static void
1442 button_drag_data_get_cb (GtkWidget          *widget,
1443                          GdkDragContext     *context,
1444                          GtkSelectionData   *selection_data,
1445                          guint               info,
1446                          guint               time_,
1447                          gpointer            data)
1448 {
1449   ButtonData *button_data;
1450   GtkPathBar *path_bar;
1451   char *uris[2];
1452
1453   button_data = data;
1454   path_bar = GTK_PATH_BAR (gtk_widget_get_parent (widget)); /* the button's parent *is* the path bar */
1455
1456   uris[0] = g_file_get_uri (button_data->file);
1457   uris[1] = NULL;
1458
1459   gtk_selection_data_set_uris (selection_data, uris);
1460   g_free (uris[0]);
1461 }
1462
1463 static ButtonData *
1464 make_directory_button (GtkPathBar  *path_bar,
1465                        const char  *dir_name,
1466                        GFile       *file,
1467                        gboolean     current_dir,
1468                        gboolean     file_is_hidden)
1469 {
1470   AtkObject *atk_obj;
1471   GtkWidget *child = NULL;
1472   GtkWidget *label_alignment = NULL;
1473   ButtonData *button_data;
1474
1475   file_is_hidden = !! file_is_hidden;
1476   /* Is it a special button? */
1477   button_data = g_new0 (ButtonData, 1);
1478
1479   button_data->type = find_button_type (path_bar, file);
1480   button_data->button = gtk_toggle_button_new ();
1481   atk_obj = gtk_widget_get_accessible (button_data->button);
1482   gtk_button_set_focus_on_click (GTK_BUTTON (button_data->button), FALSE);
1483
1484   switch (button_data->type)
1485     {
1486     case ROOT_BUTTON:
1487       button_data->image = gtk_image_new ();
1488       child = button_data->image;
1489       button_data->label = NULL;
1490       atk_object_set_name (atk_obj, _("File System Root"));
1491       break;
1492     case HOME_BUTTON:
1493     case DESKTOP_BUTTON:
1494       button_data->image = gtk_image_new ();
1495       button_data->label = gtk_label_new (NULL);
1496       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1497       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1498       child = gtk_hbox_new (FALSE, 2);
1499       gtk_box_pack_start (GTK_BOX (child), button_data->image, FALSE, FALSE, 0);
1500       gtk_box_pack_start (GTK_BOX (child), label_alignment, FALSE, FALSE, 0);
1501       break;
1502     case NORMAL_BUTTON:
1503     default:
1504       button_data->label = gtk_label_new (NULL);
1505       gtk_label_set_ellipsize (GTK_LABEL (button_data->label), PANGO_ELLIPSIZE_END);
1506       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1507       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1508       child = label_alignment;
1509       button_data->image = NULL;
1510     }
1511
1512   /* label_alignment is created because we can't override size-request
1513    * on label itself and still have the contents of the label centered
1514    * properly in the label's requisition
1515    */
1516   if (label_alignment)
1517     g_signal_connect (label_alignment, "size-request",
1518                       G_CALLBACK (label_size_request_cb), button_data);
1519
1520   button_data->dir_name = g_strdup (dir_name);
1521   button_data->file = g_object_ref (file);
1522   button_data->file_is_hidden = file_is_hidden;
1523
1524   gtk_container_add (GTK_CONTAINER (button_data->button), child);
1525   gtk_widget_show_all (button_data->button);
1526
1527   gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1528
1529   g_signal_connect (button_data->button, "clicked",
1530                     G_CALLBACK (button_clicked_cb),
1531                     button_data);
1532   g_object_weak_ref (G_OBJECT (button_data->button),
1533                      (GWeakNotify) button_data_free, button_data);
1534
1535   gtk_drag_source_set (button_data->button,
1536                        GDK_BUTTON1_MASK,
1537                        NULL, 0,
1538                        GDK_ACTION_COPY);
1539   gtk_drag_source_add_uri_targets (button_data->button);
1540   g_signal_connect (button_data->button, "drag-data-get",
1541                     G_CALLBACK (button_drag_data_get_cb), button_data);
1542
1543   return button_data;
1544 }
1545
1546 static gboolean
1547 gtk_path_bar_check_parent_path (GtkPathBar         *path_bar,
1548                                 GFile              *file,
1549                                 GtkFileSystem      *file_system)
1550 {
1551   GList *list;
1552   GList *current_path = NULL;
1553   gboolean need_new_fake_root = FALSE;
1554
1555   for (list = path_bar->button_list; list; list = list->next)
1556     {
1557       ButtonData *button_data;
1558
1559       button_data = list->data;
1560       if (g_file_equal (file, button_data->file))
1561         {
1562           current_path = list;
1563           break;
1564         }
1565       if (list == path_bar->fake_root)
1566         need_new_fake_root = TRUE;
1567     }
1568
1569   if (current_path)
1570     {
1571       if (need_new_fake_root)
1572         {
1573           path_bar->fake_root = NULL;
1574           for (list = current_path; list; list = list->next)
1575             {
1576               ButtonData *button_data;
1577
1578               button_data = list->data;
1579               if (BUTTON_IS_FAKE_ROOT (button_data))
1580                 {
1581                   path_bar->fake_root = list;
1582                   break;
1583                 }
1584             }
1585         }
1586
1587       for (list = path_bar->button_list; list; list = list->next)
1588         {
1589           gtk_path_bar_update_button_appearance (path_bar,
1590                                                  BUTTON_DATA (list->data),
1591                                                  (list == current_path) ? TRUE : FALSE);
1592         }
1593
1594       if (!gtk_widget_get_child_visible (BUTTON_DATA (current_path->data)->button))
1595         {
1596           path_bar->first_scrolled_button = current_path;
1597           gtk_widget_queue_resize (GTK_WIDGET (path_bar));
1598         }
1599
1600       return TRUE;
1601     }
1602   return FALSE;
1603 }
1604
1605
1606 struct SetFileInfo
1607 {
1608   GFile *file;
1609   GFile *parent_file;
1610   GtkPathBar *path_bar;
1611   GList *new_buttons;
1612   GList *fake_root;
1613   gboolean first_directory;
1614 };
1615
1616 static void
1617 gtk_path_bar_set_file_finish (struct SetFileInfo *info,
1618                               gboolean            result)
1619 {
1620   if (result)
1621     {
1622       GList *l;
1623
1624       gtk_path_bar_clear_buttons (info->path_bar);
1625       info->path_bar->button_list = g_list_reverse (info->new_buttons);
1626       info->path_bar->fake_root = info->fake_root;
1627
1628       for (l = info->path_bar->button_list; l; l = l->next)
1629         {
1630           GtkWidget *button = BUTTON_DATA (l->data)->button;
1631           gtk_container_add (GTK_CONTAINER (info->path_bar), button);
1632         }
1633     }
1634   else
1635     {
1636       GList *l;
1637
1638       for (l = info->new_buttons; l; l = l->next)
1639         {
1640           ButtonData *button_data;
1641
1642           button_data = BUTTON_DATA (l->data);
1643           gtk_widget_destroy (button_data->button);
1644         }
1645
1646       g_list_free (info->new_buttons);
1647     }
1648
1649   if (info->file)
1650     g_object_unref (info->file);
1651   if (info->parent_file)
1652     g_object_unref (info->parent_file);
1653   g_free (info);
1654 }
1655
1656 static void
1657 gtk_path_bar_get_info_callback (GCancellable *cancellable,
1658                                 GFileInfo    *info,
1659                                 const GError *error,
1660                                 gpointer      data)
1661 {
1662   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1663   struct SetFileInfo *file_info = data;
1664   ButtonData *button_data;
1665   const gchar *display_name;
1666   gboolean is_hidden;
1667
1668   if (cancellable != file_info->path_bar->get_info_cancellable)
1669     {
1670       gtk_path_bar_set_file_finish (file_info, FALSE);
1671       g_object_unref (cancellable);
1672       return;
1673     }
1674
1675   g_object_unref (cancellable);
1676   file_info->path_bar->get_info_cancellable = NULL;
1677
1678   if (cancelled || !info)
1679     {
1680       gtk_path_bar_set_file_finish (file_info, FALSE);
1681       return;
1682     }
1683
1684   display_name = g_file_info_get_display_name (info);
1685   is_hidden = g_file_info_get_is_hidden (info) || g_file_info_get_is_backup (info);
1686
1687   gtk_widget_push_composite_child ();
1688   button_data = make_directory_button (file_info->path_bar, display_name,
1689                                        file_info->file,
1690                                        file_info->first_directory, is_hidden);
1691   gtk_widget_pop_composite_child ();
1692   g_object_unref (file_info->file);
1693
1694   file_info->new_buttons = g_list_prepend (file_info->new_buttons, button_data);
1695
1696   if (BUTTON_IS_FAKE_ROOT (button_data))
1697     file_info->fake_root = file_info->new_buttons;
1698
1699   file_info->file = file_info->parent_file;
1700   file_info->first_directory = FALSE;
1701
1702   if (!file_info->file)
1703     {
1704       gtk_path_bar_set_file_finish (file_info, TRUE);
1705       return;
1706     }
1707
1708   file_info->parent_file = g_file_get_parent (file_info->file);
1709
1710   file_info->path_bar->get_info_cancellable =
1711     _gtk_file_system_get_info (file_info->path_bar->file_system,
1712                                file_info->file,
1713                                "standard::display-name,standard::is-hidden,standard::is-backup",
1714                                gtk_path_bar_get_info_callback,
1715                                file_info);
1716 }
1717
1718 gboolean
1719 _gtk_path_bar_set_file (GtkPathBar         *path_bar,
1720                         GFile              *file,
1721                         const gboolean      keep_trail,
1722                         GError            **error)
1723 {
1724   struct SetFileInfo *info;
1725   gboolean result;
1726
1727   g_return_val_if_fail (GTK_IS_PATH_BAR (path_bar), FALSE);
1728   g_return_val_if_fail (G_IS_FILE (file), FALSE);
1729
1730   result = TRUE;
1731
1732   /* Check whether the new path is already present in the pathbar as buttons.
1733    * This could be a parent directory or a previous selected subdirectory.
1734    */
1735   if (keep_trail &&
1736       gtk_path_bar_check_parent_path (path_bar, file, path_bar->file_system))
1737     return TRUE;
1738
1739   info = g_new0 (struct SetFileInfo, 1);
1740   info->file = g_object_ref (file);
1741   info->path_bar = path_bar;
1742   info->first_directory = TRUE;
1743   info->parent_file = g_file_get_parent (info->file);
1744
1745   if (path_bar->get_info_cancellable)
1746     g_cancellable_cancel (path_bar->get_info_cancellable);
1747
1748   path_bar->get_info_cancellable =
1749     _gtk_file_system_get_info (path_bar->file_system,
1750                                info->file,
1751                                "standard::display-name,standard::is-hidden,standard::is-backup",
1752                                gtk_path_bar_get_info_callback,
1753                                info);
1754
1755   return TRUE;
1756 }
1757
1758 /* FIXME: This should be a construct-only property */
1759 void
1760 _gtk_path_bar_set_file_system (GtkPathBar    *path_bar,
1761                                GtkFileSystem *file_system)
1762 {
1763   const char *home;
1764
1765   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1766
1767   g_assert (path_bar->file_system == NULL);
1768
1769   path_bar->file_system = g_object_ref (file_system);
1770
1771   home = g_get_home_dir ();
1772   if (home != NULL)
1773     {
1774       const gchar *desktop;
1775
1776       path_bar->home_file = g_file_new_for_path (home);
1777       /* FIXME: Need file system backend specific way of getting the
1778        * Desktop path.
1779        */
1780       desktop = g_get_user_special_dir (G_USER_DIRECTORY_DESKTOP);
1781       if (desktop != NULL)
1782         path_bar->desktop_file = g_file_new_for_path (desktop);
1783       else
1784         path_bar->desktop_file = NULL;
1785     }
1786   else
1787     {
1788       path_bar->home_file = NULL;
1789       path_bar->desktop_file = NULL;
1790     }
1791   path_bar->root_file = g_file_new_for_path ("/");
1792 }
1793
1794 /**
1795  * _gtk_path_bar_up:
1796  * @path_bar: a #GtkPathBar
1797  *
1798  * If the selected button in the pathbar is not the furthest button "up" (in the
1799  * root direction), act as if the user clicked on the next button up.
1800  **/
1801 void
1802 _gtk_path_bar_up (GtkPathBar *path_bar)
1803 {
1804   GList *l;
1805
1806   for (l = path_bar->button_list; l; l = l->next)
1807     {
1808       GtkWidget *button = BUTTON_DATA (l->data)->button;
1809       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1810         {
1811           if (l->next)
1812             {
1813               GtkWidget *next_button = BUTTON_DATA (l->next->data)->button;
1814               button_clicked_cb (next_button, l->next->data);
1815             }
1816           break;
1817         }
1818     }
1819 }
1820
1821 /**
1822  * _gtk_path_bar_down:
1823  * @path_bar: a #GtkPathBar
1824  *
1825  * If the selected button in the pathbar is not the furthest button "down" (in the
1826  * leaf direction), act as if the user clicked on the next button down.
1827  **/
1828 void
1829 _gtk_path_bar_down (GtkPathBar *path_bar)
1830 {
1831   GList *l;
1832
1833   for (l = path_bar->button_list; l; l = l->next)
1834     {
1835       GtkWidget *button = BUTTON_DATA (l->data)->button;
1836       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1837         {
1838           if (l->prev)
1839             {
1840               GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button;
1841               button_clicked_cb (prev_button, l->prev->data);
1842             }
1843           break;
1844         }
1845     }
1846 }