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

   1 /* -*- Mode: C; c-file-style: "gnu"; tab-width: 8 -*- */
   2 /* gtkpathbar.c
   3  * Copyright (C) 2004  Red Hat, Inc.,  Jonathan Blandford <jrb@gnome.org>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "config.h"
  20
  21 #include "gtkpathbar.h"
  22
  23 #include <string.h>
  24
  25 #include "gtkarrow.h"
  26 #include "gtkbox.h"
  27 #include "gtkdnd.h"
  28 #include "gtkiconfactory.h"
  29 #include "gtkicontheme.h"
  30 #include "gtkimage.h"
  31 #include "gtkintl.h"
  32 #include "gtklabel.h"
  33 #include "gtkmain.h"
  34 #include "gtkmarshalers.h"
  35 #include "gtksettings.h"
  36 #include "gtktogglebutton.h"
  37 #include "gtkwidgetpath.h"
  38 #include "gtkwidgetprivate.h"
  39
  40
  41 enum {
  42   PATH_CLICKED,
  43   LAST_SIGNAL
  44 };
  45
  46 typedef enum {
  47   NORMAL_BUTTON,
  48   ROOT_BUTTON,
  49   HOME_BUTTON,
  50   DESKTOP_BUTTON
  51 } ButtonType;
  52
  53 #define BUTTON_DATA(x) ((ButtonData *)(x))
  54
  55 #define SCROLL_DELAY_FACTOR 5
  56
  57 static guint path_bar_signals [LAST_SIGNAL] = { 0 };
  58
  59 /* Icon size for if we can't get it from the theme */
  60 #define FALLBACK_ICON_SIZE 16
  61
  62 typedef struct _ButtonData ButtonData;
  63
  64 struct _ButtonData
  65 {
  66   GtkWidget *button;
  67   ButtonType type;
  68   char *dir_name;
  69   GFile *file;
  70   GtkWidget *image;
  71   GtkWidget *label;
  72   GCancellable *cancellable;
  73   guint ignore_changes : 1;
  74   guint file_is_hidden : 1;
  75 };
  76 /* This macro is used to check if a button can be used as a fake root.
  77  * All buttons in front of a fake root are automatically hidden when in a
  78  * directory below a fake root and replaced with the "<" arrow button.
  79  */
  80 #define BUTTON_IS_FAKE_ROOT(button) ((button)->type == HOME_BUTTON)
  81
  82 G_DEFINE_TYPE (GtkPathBar, gtk_path_bar, GTK_TYPE_CONTAINER)
  83
  84 static void gtk_path_bar_finalize                 (GObject          *object);
  85 static void gtk_path_bar_dispose                  (GObject          *object);
  86 static void gtk_path_bar_realize                  (GtkWidget        *widget);
  87 static void gtk_path_bar_unrealize                (GtkWidget        *widget);
  88 static void gtk_path_bar_get_preferred_width      (GtkWidget        *widget,
  89                                                    gint             *minimum,
  90                                                    gint             *natural);
  91 static void gtk_path_bar_get_preferred_height     (GtkWidget        *widget,
  92                                                    gint             *minimum,
  93                                                    gint             *natural);
  94 static void gtk_path_bar_map                      (GtkWidget        *widget);
  95 static void gtk_path_bar_unmap                    (GtkWidget        *widget);
  96 static void gtk_path_bar_size_allocate            (GtkWidget        *widget,
  97                                                    GtkAllocation    *allocation);
  98 static void gtk_path_bar_add                      (GtkContainer     *container,
  99                                                    GtkWidget        *widget);
 100 static void gtk_path_bar_remove                   (GtkContainer     *container,
 101                                                    GtkWidget        *widget);
 102 static void gtk_path_bar_forall                   (GtkContainer     *container,
 103                                                    gboolean          include_internals,
 104                                                    GtkCallback       callback,
 105                                                    gpointer          callback_data);
 106 static GtkWidgetPath *gtk_path_bar_get_path_for_child (GtkContainer *container,
 107                                                        GtkWidget    *child);
 108 static gboolean gtk_path_bar_scroll               (GtkWidget        *widget,
 109                                                    GdkEventScroll   *event);
 110 static void gtk_path_bar_scroll_up                (GtkPathBar       *path_bar);
 111 static void gtk_path_bar_scroll_down              (GtkPathBar       *path_bar);
 112 static void gtk_path_bar_stop_scrolling           (GtkPathBar       *path_bar);
 113 static gboolean gtk_path_bar_slider_up_defocus    (GtkWidget        *widget,
 114                                                    GdkEventButton   *event,
 115                                                    GtkPathBar       *path_bar);
 116 static gboolean gtk_path_bar_slider_down_defocus  (GtkWidget        *widget,
 117                                                    GdkEventButton   *event,
 118                                                    GtkPathBar       *path_bar);
 119 static gboolean gtk_path_bar_slider_button_press  (GtkWidget        *widget,
 120                                                    GdkEventButton   *event,
 121                                                    GtkPathBar       *path_bar);
 122 static gboolean gtk_path_bar_slider_button_release(GtkWidget        *widget,
 123                                                    GdkEventButton   *event,
 124                                                    GtkPathBar       *path_bar);
 125 static void gtk_path_bar_grab_notify              (GtkWidget        *widget,
 126                                                    gboolean          was_grabbed);
 127 static void gtk_path_bar_state_changed            (GtkWidget        *widget,
 128                                                    GtkStateType      previous_state);
 129 static void gtk_path_bar_style_updated            (GtkWidget        *widget);
 130 static void gtk_path_bar_screen_changed           (GtkWidget        *widget,
 131                                                    GdkScreen        *previous_screen);
 132 static void gtk_path_bar_check_icon_theme         (GtkPathBar       *path_bar);
 133 static void gtk_path_bar_update_button_appearance (GtkPathBar       *path_bar,
 134                                                    ButtonData       *button_data,
 135                                                    gboolean          current_dir);
 136
 137 static void
 138 on_slider_unmap (GtkWidget  *widget,
 139                  GtkPathBar *path_bar)
 140 {
 141   if (path_bar->timer &&
 142       ((widget == path_bar->up_slider_button && path_bar->scrolling_up) ||
 143        (widget == path_bar->down_slider_button && path_bar->scrolling_down)))
 144     gtk_path_bar_stop_scrolling (path_bar);
 145 }
 146
 147 static GtkWidget *
 148 get_slider_button (GtkPathBar  *path_bar,
 149                    GtkArrowType arrow_type)
 150 {
 151   GtkWidget *button;
 152   AtkObject *atk_obj;
 153
 154   gtk_widget_push_composite_child ();
 155
 156   button = gtk_button_new ();
 157   atk_obj = gtk_widget_get_accessible (button);
 158   if (arrow_type == GTK_ARROW_LEFT)
 159     atk_object_set_name (atk_obj, _("Up Path"));
 160   else
 161     atk_object_set_name (atk_obj, _("Down Path"));
 162
 163   gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE);
 164   gtk_widget_add_events (button, GDK_SCROLL_MASK);
 165   gtk_container_add (GTK_CONTAINER (button),
 166                      gtk_arrow_new (arrow_type, GTK_SHADOW_OUT));
 167   gtk_container_add (GTK_CONTAINER (path_bar), button);
 168   gtk_widget_show_all (button);
 169
 170   g_signal_connect (G_OBJECT (button), "unmap",
 171                     G_CALLBACK (on_slider_unmap), path_bar);
 172
 173   gtk_widget_pop_composite_child ();
 174
 175   return button;
 176 }
 177
 178 static void
 179 gtk_path_bar_init (GtkPathBar *path_bar)
 180 {
 181   GtkStyleContext *context;
 182
 183   gtk_widget_set_has_window (GTK_WIDGET (path_bar), FALSE);
 184   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (path_bar), FALSE);
 185
 186   path_bar->get_info_cancellable = NULL;
 187
 188   path_bar->spacing = 0;
 189   path_bar->up_slider_button = get_slider_button (path_bar, GTK_ARROW_LEFT);
 190   path_bar->down_slider_button = get_slider_button (path_bar, GTK_ARROW_RIGHT);
 191   path_bar->icon_size = FALLBACK_ICON_SIZE;
 192
 193   g_signal_connect_swapped (path_bar->up_slider_button, "clicked",
 194                             G_CALLBACK (gtk_path_bar_scroll_up), path_bar);
 195   g_signal_connect_swapped (path_bar->down_slider_button, "clicked",
 196                             G_CALLBACK (gtk_path_bar_scroll_down), path_bar);
 197
 198   g_signal_connect (path_bar->up_slider_button, "focus-out-event",
 199                     G_CALLBACK (gtk_path_bar_slider_up_defocus), path_bar);
 200   g_signal_connect (path_bar->down_slider_button, "focus-out-event",
 201                     G_CALLBACK (gtk_path_bar_slider_down_defocus), path_bar);
 202
 203   g_signal_connect (path_bar->up_slider_button, "button-press-event",
 204                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 205   g_signal_connect (path_bar->up_slider_button, "button-release-event",
 206                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 207   g_signal_connect (path_bar->down_slider_button, "button-press-event",
 208                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 209   g_signal_connect (path_bar->down_slider_button, "button-release-event",
 210                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 211
 212   context = gtk_widget_get_style_context (GTK_WIDGET (path_bar));
 213   gtk_style_context_add_class (context, GTK_STYLE_CLASS_LINKED);
 214 }
 215
 216 static void
 217 gtk_path_bar_class_init (GtkPathBarClass *path_bar_class)
 218 {
 219   GObjectClass *gobject_class;
 220   GtkWidgetClass *widget_class;
 221   GtkContainerClass *container_class;
 222
 223   gobject_class = (GObjectClass *) path_bar_class;
 224   widget_class = (GtkWidgetClass *) path_bar_class;
 225   container_class = (GtkContainerClass *) path_bar_class;
 226
 227   gobject_class->finalize = gtk_path_bar_finalize;
 228   gobject_class->dispose = gtk_path_bar_dispose;
 229
 230   widget_class->get_preferred_width = gtk_path_bar_get_preferred_width;
 231   widget_class->get_preferred_height = gtk_path_bar_get_preferred_height;
 232   widget_class->realize = gtk_path_bar_realize;
 233   widget_class->unrealize = gtk_path_bar_unrealize;
 234   widget_class->map = gtk_path_bar_map;
 235   widget_class->unmap = gtk_path_bar_unmap;
 236   widget_class->size_allocate = gtk_path_bar_size_allocate;
 237   widget_class->style_updated = gtk_path_bar_style_updated;
 238   widget_class->screen_changed = gtk_path_bar_screen_changed;
 239   widget_class->grab_notify = gtk_path_bar_grab_notify;
 240   widget_class->state_changed = gtk_path_bar_state_changed;
 241   widget_class->scroll_event = gtk_path_bar_scroll;
 242
 243   container_class->add = gtk_path_bar_add;
 244   container_class->forall = gtk_path_bar_forall;
 245   container_class->remove = gtk_path_bar_remove;
 246   container_class->get_path_for_child = gtk_path_bar_get_path_for_child;
 247   gtk_container_class_handle_border_width (container_class);
 248   /* FIXME: */
 249   /*  container_class->child_type = gtk_path_bar_child_type;*/
 250
 251   path_bar_signals [PATH_CLICKED] =
 252     g_signal_new (I_("path-clicked"),
 253                   G_OBJECT_CLASS_TYPE (gobject_class),
 254                   G_SIGNAL_RUN_FIRST,
 255                   G_STRUCT_OFFSET (GtkPathBarClass, path_clicked),
 256                   NULL, NULL,
 257                   _gtk_marshal_VOID__POINTER_POINTER_BOOLEAN,
 258                   G_TYPE_NONE, 3,
 259                   G_TYPE_POINTER,
 260                   G_TYPE_POINTER,
 261                   G_TYPE_BOOLEAN);
 262 }
 263
 264
 265 static void
 266 gtk_path_bar_finalize (GObject *object)
 267 {
 268   GtkPathBar *path_bar;
 269
 270   path_bar = GTK_PATH_BAR (object);
 271
 272   gtk_path_bar_stop_scrolling (path_bar);
 273
 274   g_list_free (path_bar->button_list);
 275   if (path_bar->root_file)
 276     g_object_unref (path_bar->root_file);
 277   if (path_bar->home_file)
 278     g_object_unref (path_bar->home_file);
 279   if (path_bar->desktop_file)
 280     g_object_unref (path_bar->desktop_file);
 281
 282   if (path_bar->root_icon)
 283     g_object_unref (path_bar->root_icon);
 284   if (path_bar->home_icon)
 285     g_object_unref (path_bar->home_icon);
 286   if (path_bar->desktop_icon)
 287     g_object_unref (path_bar->desktop_icon);
 288
 289   if (path_bar->file_system)
 290     g_object_unref (path_bar->file_system);
 291
 292   G_OBJECT_CLASS (gtk_path_bar_parent_class)->finalize (object);
 293 }
 294
 295 /* Removes the settings signal handler.  It's safe to call multiple times */
 296 static void
 297 remove_settings_signal (GtkPathBar *path_bar,
 298                         GdkScreen  *screen)
 299 {
 300   if (path_bar->settings_signal_id)
 301     {
 302       GtkSettings *settings;
 303
 304       settings = gtk_settings_get_for_screen (screen);
 305       g_signal_handler_disconnect (settings,
 306                                    path_bar->settings_signal_id);
 307       path_bar->settings_signal_id = 0;
 308     }
 309 }
 310
 311 static void
 312 gtk_path_bar_dispose (GObject *object)
 313 {
 314   GtkPathBar *path_bar = GTK_PATH_BAR (object);
 315
 316   remove_settings_signal (path_bar, gtk_widget_get_screen (GTK_WIDGET (object)));
 317
 318   if (path_bar->get_info_cancellable)
 319     g_cancellable_cancel (path_bar->get_info_cancellable);
 320   path_bar->get_info_cancellable = NULL;
 321
 322   G_OBJECT_CLASS (gtk_path_bar_parent_class)->dispose (object);
 323 }
 324
 325 /* Size requisition:
 326  *
 327  * Ideally, our size is determined by another widget, and we are just filling
 328  * available space.
 329  */
 330 static void
 331 gtk_path_bar_get_preferred_width (GtkWidget *widget,
 332                                   gint      *minimum,
 333                                   gint      *natural)
 334 {
 335   ButtonData *button_data;
 336   GtkPathBar *path_bar;
 337   GList *list;
 338   gint child_height;
 339   gint height;
 340   gint child_min, child_nat;
 341
 342   path_bar = GTK_PATH_BAR (widget);
 343
 344   *minimum = *natural = 0;
 345   height = 0;
 346
 347   for (list = path_bar->button_list; list; list = list->next)
 348     {
 349       button_data = BUTTON_DATA (list->data);
 350       gtk_widget_get_preferred_width (button_data->button, &child_min, &child_nat);
 351       gtk_widget_get_preferred_height (button_data->button, &child_height, NULL);
 352       height = MAX (height, child_height);
 353
 354       if (button_data->type == NORMAL_BUTTON)
 355         {
 356           /* Use 2*Height as button width because of ellipsized label.  */
 357           child_min = MAX (child_min, child_height * 2);
 358           child_nat = MAX (child_min, child_height * 2);
 359         }
 360
 361       *minimum = MAX (*minimum, child_min);
 362       *natural = MAX (*natural, child_nat);
 363     }
 364
 365   /* Add space for slider, if we have more than one path */
 366   /* Theoretically, the slider could be bigger than the other button.  But we're
 367    * not going to worry about that now.
 368    */
 369   path_bar->slider_width = MIN (height * 2 / 3 + 5, height);
 370   if (path_bar->button_list && path_bar->button_list->next != NULL)
 371     {
 372       *minimum += (path_bar->spacing + path_bar->slider_width) * 2;
 373       *natural += (path_bar->spacing + path_bar->slider_width) * 2;
 374     }
 375 }
 376
 377 static void
 378 gtk_path_bar_get_preferred_height (GtkWidget *widget,
 379                                    gint      *minimum,
 380                                    gint      *natural)
 381 {
 382   ButtonData *button_data;
 383   GtkPathBar *path_bar;
 384   GList *list;
 385   gint child_min, child_nat;
 386
 387   path_bar = GTK_PATH_BAR (widget);
 388
 389   *minimum = *natural = 0;
 390
 391   for (list = path_bar->button_list; list; list = list->next)
 392     {
 393       button_data = BUTTON_DATA (list->data);
 394       gtk_widget_get_preferred_height (button_data->button, &child_min, &child_nat);
 395
 396       *minimum = MAX (*minimum, child_min);
 397       *natural = MAX (*natural, child_nat);
 398     }
 399 }
 400
 401 static void
 402 gtk_path_bar_update_slider_buttons (GtkPathBar *path_bar)
 403 {
 404   if (path_bar->button_list)
 405     {
 406       GtkWidget *button;
 407
 408       button = BUTTON_DATA (path_bar->button_list->data)->button;
 409       if (gtk_widget_get_child_visible (button))
 410         {
 411           gtk_path_bar_stop_scrolling (path_bar);
 412           gtk_widget_set_sensitive (path_bar->down_slider_button, FALSE);
 413         }
 414       else
 415         gtk_widget_set_sensitive (path_bar->down_slider_button, TRUE);
 416
 417       button = BUTTON_DATA (g_list_last (path_bar->button_list)->data)->button;
 418       if (gtk_widget_get_child_visible (button))
 419         {
 420           gtk_path_bar_stop_scrolling (path_bar);
 421           gtk_widget_set_sensitive (path_bar->up_slider_button, FALSE);
 422         }
 423       else
 424         gtk_widget_set_sensitive (path_bar->up_slider_button, TRUE);
 425     }
 426 }
 427
 428 static void
 429 gtk_path_bar_map (GtkWidget *widget)
 430 {
 431   gdk_window_show (GTK_PATH_BAR (widget)->event_window);
 432
 433   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->map (widget);
 434 }
 435
 436 static void
 437 gtk_path_bar_unmap (GtkWidget *widget)
 438 {
 439   gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 440   gdk_window_hide (GTK_PATH_BAR (widget)->event_window);
 441
 442   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unmap (widget);
 443 }
 444
 445 static void
 446 gtk_path_bar_realize (GtkWidget *widget)
 447 {
 448   GtkPathBar *path_bar;
 449   GtkAllocation allocation;
 450   GdkWindow *window;
 451   GdkWindowAttr attributes;
 452   gint attributes_mask;
 453
 454   gtk_widget_set_realized (widget, TRUE);
 455
 456   path_bar = GTK_PATH_BAR (widget);
 457   window = gtk_widget_get_parent_window (widget);
 458   gtk_widget_set_window (widget, window);
 459   g_object_ref (window);
 460
 461   gtk_widget_get_allocation (widget, &allocation);
 462
 463   attributes.window_type = GDK_WINDOW_CHILD;
 464   attributes.x = allocation.x;
 465   attributes.y = allocation.y;
 466   attributes.width = allocation.width;
 467   attributes.height = allocation.height;
 468   attributes.wclass = GDK_INPUT_ONLY;
 469   attributes.event_mask = gtk_widget_get_events (widget);
 470   attributes.event_mask |= GDK_SCROLL_MASK;
 471   attributes_mask = GDK_WA_X | GDK_WA_Y;
 472
 473   path_bar->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
 474                                            &attributes, attributes_mask);
 475   gdk_window_set_user_data (path_bar->event_window, widget);
 476 }
 477
 478 static void
 479 gtk_path_bar_unrealize (GtkWidget *widget)
 480 {
 481   GtkPathBar *path_bar;
 482
 483   path_bar = GTK_PATH_BAR (widget);
 484
 485   gdk_window_set_user_data (path_bar->event_window, NULL);
 486   gdk_window_destroy (path_bar->event_window);
 487   path_bar->event_window = NULL;
 488
 489   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unrealize (widget);
 490 }
 491
 492 static void
 493 child_ordering_changed (GtkPathBar *path_bar)
 494 {
 495   GList *l;
 496
 497   if (path_bar->up_slider_button)
 498     _gtk_widget_invalidate_style_context (path_bar->up_slider_button,
 499                                           GTK_CSS_CHANGE_POSITION | GTK_CSS_CHANGE_SIBLING_POSITION);
 500   if (path_bar->down_slider_button)
 501     _gtk_widget_invalidate_style_context (path_bar->down_slider_button,
 502                                           GTK_CSS_CHANGE_POSITION | GTK_CSS_CHANGE_SIBLING_POSITION);
 503
 504   for (l = path_bar->button_list; l; l = l->next)
 505     {
 506       ButtonData *data = l->data;
 507
 508       _gtk_widget_invalidate_style_context (data->button,
 509                                             GTK_CSS_CHANGE_POSITION | GTK_CSS_CHANGE_SIBLING_POSITION);
 510     }
 511 }
 512
 513 /* This is a tad complicated
 514  */
 515 static void
 516 gtk_path_bar_size_allocate (GtkWidget     *widget,
 517                             GtkAllocation *allocation)
 518 {
 519   GtkWidget *child;
 520   GtkPathBar *path_bar = GTK_PATH_BAR (widget);
 521   GtkTextDirection direction;
 522   GtkAllocation child_allocation;
 523   GList *list, *first_button;
 524   gint width;
 525   gint allocation_width;
 526   gboolean need_sliders = FALSE;
 527   gint up_slider_offset = 0;
 528   GtkRequisition child_requisition;
 529
 530   gtk_widget_set_allocation (widget, allocation);
 531
 532   if (gtk_widget_get_realized (widget))
 533     gdk_window_move_resize (path_bar->event_window,
 534                             allocation->x, allocation->y,
 535                             allocation->width, allocation->height);
 536
 537   /* No path is set; we don't have to allocate anything. */
 538   if (path_bar->button_list == NULL)
 539     return;
 540
 541   direction = gtk_widget_get_direction (widget);
 542   allocation_width = allocation->width;
 543
 544   /* First, we check to see if we need the scrollbars. */
 545   if (path_bar->fake_root)
 546     width = path_bar->spacing + path_bar->slider_width;
 547   else
 548     width = 0;
 549
 550   for (list = path_bar->button_list; list; list = list->next)
 551     {
 552       child = BUTTON_DATA (list->data)->button;
 553
 554       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 555
 556       width += child_requisition.width + path_bar->spacing;
 557       if (list == path_bar->fake_root)
 558         break;
 559     }
 560
 561   if (width <= allocation_width)
 562     {
 563       if (path_bar->fake_root)
 564         first_button = path_bar->fake_root;
 565       else
 566         first_button = g_list_last (path_bar->button_list);
 567     }
 568   else
 569     {
 570       gboolean reached_end = FALSE;
 571       gint slider_space = 2 * (path_bar->spacing + path_bar->slider_width);
 572
 573       if (path_bar->first_scrolled_button)
 574         first_button = path_bar->first_scrolled_button;
 575       else
 576         first_button = path_bar->button_list;
 577       need_sliders = TRUE;
 578
 579       /* To see how much space we have, and how many buttons we can display.
 580        * We start at the first button, count forward until hit the new
 581        * button, then count backwards.
 582        */
 583       /* Count down the path chain towards the end. */
 584       gtk_widget_get_preferred_size (BUTTON_DATA (first_button->data)->button,
 585                                      &child_requisition, NULL);
 586
 587       width = child_requisition.width;
 588       list = first_button->prev;
 589       while (list && !reached_end)
 590         {
 591           child = BUTTON_DATA (list->data)->button;
 592
 593           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 594
 595           if (width + child_requisition.width +
 596               path_bar->spacing + slider_space > allocation_width)
 597             reached_end = TRUE;
 598           else if (list == path_bar->fake_root)
 599             break;
 600           else
 601             width += child_requisition.width + path_bar->spacing;
 602
 603           list = list->prev;
 604         }
 605
 606       /* Finally, we walk up, seeing how many of the previous buttons we can
 607        * add */
 608       while (first_button->next && !reached_end)
 609         {
 610           child = BUTTON_DATA (first_button->next->data)->button;
 611
 612           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 613
 614           if (width + child_requisition.width + path_bar->spacing + slider_space > allocation_width)
 615             {
 616               reached_end = TRUE;
 617             }
 618           else
 619             {
 620               width += child_requisition.width + path_bar->spacing;
 621               if (first_button == path_bar->fake_root)
 622                 break;
 623               first_button = first_button->next;
 624             }
 625         }
 626     }
 627
 628   /* Now, we allocate space to the buttons */
 629   child_allocation.y = allocation->y;
 630   child_allocation.height = allocation->height;
 631
 632   if (direction == GTK_TEXT_DIR_RTL)
 633     {
 634       child_allocation.x = allocation->x + allocation->width;
 635       if (need_sliders || path_bar->fake_root)
 636         {
 637           child_allocation.x -= (path_bar->spacing + path_bar->slider_width);
 638           up_slider_offset = allocation->width - path_bar->slider_width;
 639         }
 640     }
 641   else
 642     {
 643       child_allocation.x = allocation->x;
 644       if (need_sliders || path_bar->fake_root)
 645         {
 646           up_slider_offset = 0;
 647           child_allocation.x += (path_bar->spacing + path_bar->slider_width);
 648         }
 649     }
 650
 651   for (list = first_button; list; list = list->prev)
 652     {
 653       GtkAllocation widget_allocation;
 654       ButtonData *button_data;
 655
 656       button_data = BUTTON_DATA (list->data);
 657       child = button_data->button;
 658
 659       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 660
 661       child_allocation.width = MIN (child_requisition.width,
 662                                     allocation_width - (path_bar->spacing + path_bar->slider_width) * 2);
 663
 664       if (direction == GTK_TEXT_DIR_RTL)
 665         child_allocation.x -= child_allocation.width;
 666
 667       /* Check to see if we've don't have any more space to allocate buttons */
 668       if (need_sliders && direction == GTK_TEXT_DIR_RTL)
 669         {
 670           gtk_widget_get_allocation (widget, &widget_allocation);
 671           if (child_allocation.x - path_bar->spacing - path_bar->slider_width < widget_allocation.x)
 672             break;
 673         }
 674       else if (need_sliders && direction == GTK_TEXT_DIR_LTR)
 675         {
 676           gtk_widget_get_allocation (widget, &widget_allocation);
 677           if (child_allocation.x + child_allocation.width + path_bar->spacing + path_bar->slider_width >
 678               widget_allocation.x + allocation_width)
 679             break;
 680         }
 681
 682       if (child_allocation.width < child_requisition.width)
 683         {
 684           if (!gtk_widget_get_has_tooltip (child))
 685             gtk_widget_set_tooltip_text (child, button_data->dir_name);
 686         }
 687       else if (gtk_widget_get_has_tooltip (child))
 688         gtk_widget_set_tooltip_text (child, NULL);
 689
 690       gtk_widget_set_child_visible (child, TRUE);
 691       gtk_widget_size_allocate (child, &child_allocation);
 692
 693       if (direction == GTK_TEXT_DIR_RTL)
 694         child_allocation.x -= path_bar->spacing;
 695       else
 696         child_allocation.x += child_allocation.width + path_bar->spacing;
 697     }
 698   /* Now we go hide all the widgets that don't fit */
 699   while (list)
 700     {
 701       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 702       list = list->prev;
 703     }
 704   for (list = first_button->next; list; list = list->next)
 705     {
 706       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 707     }
 708
 709   if (need_sliders || path_bar->fake_root)
 710     {
 711       child_allocation.width = path_bar->slider_width;
 712       child_allocation.x = up_slider_offset + allocation->x;
 713       gtk_widget_size_allocate (path_bar->up_slider_button, &child_allocation);
 714
 715       gtk_widget_set_child_visible (path_bar->up_slider_button, TRUE);
 716       gtk_widget_show_all (path_bar->up_slider_button);
 717     }
 718   else
 719     gtk_widget_set_child_visible (path_bar->up_slider_button, FALSE);
 720
 721   if (need_sliders)
 722     {
 723       child_allocation.width = path_bar->slider_width;
 724
 725       if (direction == GTK_TEXT_DIR_RTL)
 726         child_allocation.x = 0;
 727       else
 728         child_allocation.x = allocation->width - path_bar->slider_width;
 729
 730       child_allocation.x += allocation->x;
 731
 732       gtk_widget_size_allocate (path_bar->down_slider_button, &child_allocation);
 733
 734       gtk_widget_set_child_visible (path_bar->down_slider_button, TRUE);
 735       gtk_widget_show_all (path_bar->down_slider_button);
 736       gtk_path_bar_update_slider_buttons (path_bar);
 737     }
 738   else
 739     gtk_widget_set_child_visible (path_bar->down_slider_button, FALSE);
 740
 741   child_ordering_changed (path_bar);
 742 }
 743
 744 static void
 745 gtk_path_bar_style_updated (GtkWidget *widget)
 746 {
 747   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_updated (widget);
 748
 749   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 750 }
 751
 752 static void
 753 gtk_path_bar_screen_changed (GtkWidget *widget,
 754                              GdkScreen *previous_screen)
 755 {
 756   if (GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed)
 757     GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed (widget, previous_screen);
 758
 759   /* We might nave a new settings, so we remove the old one */
 760   if (previous_screen)
 761     remove_settings_signal (GTK_PATH_BAR (widget), previous_screen);
 762
 763   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 764 }
 765
 766 static gboolean
 767 gtk_path_bar_scroll (GtkWidget      *widget,
 768                      GdkEventScroll *event)
 769 {
 770   switch (event->direction)
 771     {
 772     case GDK_SCROLL_RIGHT:
 773     case GDK_SCROLL_DOWN:
 774       gtk_path_bar_scroll_down (GTK_PATH_BAR (widget));
 775       break;
 776     case GDK_SCROLL_LEFT:
 777     case GDK_SCROLL_UP:
 778       gtk_path_bar_scroll_up (GTK_PATH_BAR (widget));
 779       break;
 780     case GDK_SCROLL_SMOOTH:
 781       break;
 782     }
 783
 784   return TRUE;
 785 }
 786
 787 static void
 788 gtk_path_bar_add (GtkContainer *container,
 789                   GtkWidget    *widget)
 790
 791 {
 792   gtk_widget_set_parent (widget, GTK_WIDGET (container));
 793 }
 794
 795 static void
 796 gtk_path_bar_remove_1 (GtkContainer *container,
 797                        GtkWidget    *widget)
 798 {
 799   gboolean was_visible = gtk_widget_get_visible (widget);
 800   gtk_widget_unparent (widget);
 801   if (was_visible)
 802     gtk_widget_queue_resize (GTK_WIDGET (container));
 803 }
 804
 805 static void
 806 gtk_path_bar_remove (GtkContainer *container,
 807                      GtkWidget    *widget)
 808 {
 809   GtkPathBar *path_bar;
 810   GList *children;
 811
 812   path_bar = GTK_PATH_BAR (container);
 813
 814   if (widget == path_bar->up_slider_button)
 815     {
 816       gtk_path_bar_remove_1 (container, widget);
 817       path_bar->up_slider_button = NULL;
 818       return;
 819     }
 820
 821   if (widget == path_bar->down_slider_button)
 822     {
 823       gtk_path_bar_remove_1 (container, widget);
 824       path_bar->down_slider_button = NULL;
 825       return;
 826     }
 827
 828   children = path_bar->button_list;
 829   while (children)
 830     {
 831       if (widget == BUTTON_DATA (children->data)->button)
 832         {
 833           gtk_path_bar_remove_1 (container, widget);
 834           path_bar->button_list = g_list_remove_link (path_bar->button_list, children);
 835           g_list_free (children);
 836           return;
 837         }
 838
 839       children = children->next;
 840     }
 841 }
 842
 843 static void
 844 gtk_path_bar_forall (GtkContainer *container,
 845                      gboolean      include_internals,
 846                      GtkCallback   callback,
 847                      gpointer      callback_data)
 848 {
 849   GtkPathBar *path_bar;
 850   GList *children;
 851
 852   g_return_if_fail (callback != NULL);
 853   path_bar = GTK_PATH_BAR (container);
 854
 855   children = path_bar->button_list;
 856   while (children)
 857     {
 858       GtkWidget *child;
 859       child = BUTTON_DATA (children->data)->button;
 860       children = children->next;
 861
 862       (* callback) (child, callback_data);
 863     }
 864
 865   if (path_bar->up_slider_button)
 866     (* callback) (path_bar->up_slider_button, callback_data);
 867
 868   if (path_bar->down_slider_button)
 869     (* callback) (path_bar->down_slider_button, callback_data);
 870 }
 871
 872 static GtkWidgetPath *
 873 gtk_path_bar_get_path_for_child (GtkContainer *container,
 874                                  GtkWidget    *child)
 875 {
 876   GtkPathBar *path_bar = GTK_PATH_BAR (container);
 877   GtkWidgetPath *path;
 878
 879   path = gtk_widget_path_copy (gtk_widget_get_path (GTK_WIDGET (path_bar)));
 880
 881   if (gtk_widget_get_visible (child) &&
 882       gtk_widget_get_child_visible (child))
 883     {
 884       GtkWidgetPath *sibling_path;
 885       GList *visible_children;
 886       GList *l;
 887       int pos;
 888
 889       /* 1. Build the list of visible children, in visually left-to-right order
 890        * (i.e. independently of the widget's direction).  Note that our
 891        * button_list is stored in innermost-to-outermost path order!
 892        */
 893
 894       visible_children = NULL;
 895
 896       if (gtk_widget_get_visible (path_bar->down_slider_button) &&
 897           gtk_widget_get_child_visible (path_bar->down_slider_button))
 898         visible_children = g_list_prepend (visible_children, path_bar->down_slider_button);
 899
 900       for (l = path_bar->button_list; l; l = l->next)
 901         {
 902           ButtonData *data = l->data;
 903
 904           if (gtk_widget_get_visible (data->button) &&
 905               gtk_widget_get_child_visible (data->button))
 906             visible_children = g_list_prepend (visible_children, data->button);
 907         }
 908
 909       if (gtk_widget_get_visible (path_bar->up_slider_button) &&
 910           gtk_widget_get_child_visible (path_bar->up_slider_button))
 911         visible_children = g_list_prepend (visible_children, path_bar->up_slider_button);
 912
 913       if (gtk_widget_get_direction (GTK_WIDGET (path_bar)) == GTK_TEXT_DIR_RTL)
 914         visible_children = g_list_reverse (visible_children);
 915
 916       /* 2. Find the index of the child within that list */
 917
 918       pos = 0;
 919
 920       for (l = visible_children; l; l = l->next)
 921         {
 922           GtkWidget *button = l->data;
 923
 924           if (button == child)
 925             break;
 926
 927           pos++;
 928         }
 929
 930       /* 3. Build the path */
 931
 932       sibling_path = gtk_widget_path_new ();
 933
 934       for (l = visible_children; l; l = l->next)
 935         gtk_widget_path_append_for_widget (sibling_path, l->data);
 936
 937       gtk_widget_path_append_with_siblings (path, sibling_path, pos);
 938
 939       g_list_free (visible_children);
 940       gtk_widget_path_unref (sibling_path);
 941     }
 942   else
 943     gtk_widget_path_append_for_widget (path, child);
 944
 945   return path;
 946 }
 947
 948 static void
 949 gtk_path_bar_scroll_down (GtkPathBar *path_bar)
 950 {
 951   GtkAllocation allocation, button_allocation;
 952   GList *list;
 953   GList *down_button = NULL;
 954   gint space_available;
 955
 956   if (path_bar->ignore_click)
 957     {
 958       path_bar->ignore_click = FALSE;
 959       return;
 960     }
 961
 962   if (gtk_widget_get_child_visible (BUTTON_DATA (path_bar->button_list->data)->button))
 963     {
 964       /* Return if the last button is already visible */
 965       return;
 966     }
 967
 968   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 969
 970   /* We find the button at the 'down' end that we have to make
 971    * visible */
 972   for (list = path_bar->button_list; list; list = list->next)
 973     {
 974       if (list->next && gtk_widget_get_child_visible (BUTTON_DATA (list->next->data)->button))
 975         {
 976           down_button = list;
 977           break;
 978         }
 979     }
 980
 981   gtk_widget_get_allocation (GTK_WIDGET (path_bar), &allocation);
 982   gtk_widget_get_allocation (BUTTON_DATA (down_button->data)->button, &button_allocation);
 983
 984   space_available = (allocation.width
 985                      - 2 * path_bar->spacing - 2 * path_bar->slider_width
 986                      - button_allocation.width);
 987   path_bar->first_scrolled_button = down_button;
 988
 989   /* We have space_available free space that's not being used.
 990    * So we walk down from the end, adding buttons until we use all free space.
 991    */
 992   while (space_available > 0)
 993     {
 994       path_bar->first_scrolled_button = down_button;
 995       down_button = down_button->next;
 996       if (!down_button)
 997         break;
 998       space_available -= (button_allocation.width
 999                           + path_bar->spacing);
1000     }
1001 }
1002
1003 static void
1004 gtk_path_bar_scroll_up (GtkPathBar *path_bar)
1005 {
1006   GList *list;
1007
1008   if (path_bar->ignore_click)
1009     {
1010       path_bar->ignore_click = FALSE;
1011       return;
1012     }
1013
1014   list = g_list_last (path_bar->button_list);
1015
1016   if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
1017     {
1018       /* Return if the first button is already visible */
1019       return;
1020     }
1021
1022   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
1023
1024   for ( ; list; list = list->prev)
1025     {
1026       if (list->prev && gtk_widget_get_child_visible (BUTTON_DATA (list->prev->data)->button))
1027         {
1028           if (list->prev == path_bar->fake_root)
1029             path_bar->fake_root = NULL;
1030           path_bar->first_scrolled_button = list;
1031           return;
1032         }
1033     }
1034 }
1035
1036 static gboolean
1037 gtk_path_bar_scroll_timeout (GtkPathBar *path_bar)
1038 {
1039   gboolean retval = FALSE;
1040
1041   if (path_bar->timer)
1042     {
1043       if (path_bar->scrolling_up)
1044         gtk_path_bar_scroll_up (path_bar);
1045       else if (path_bar->scrolling_down)
1046         gtk_path_bar_scroll_down (path_bar);
1047
1048       if (path_bar->need_timer)
1049         {
1050           GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (path_bar));
1051           guint        timeout;
1052
1053           g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
1054
1055           path_bar->need_timer = FALSE;
1056
1057           path_bar->timer = gdk_threads_add_timeout (timeout * SCROLL_DELAY_FACTOR,
1058                                            (GSourceFunc)gtk_path_bar_scroll_timeout,
1059                                            path_bar);
1060         }
1061       else
1062         retval = TRUE;
1063     }
1064
1065   return retval;
1066 }
1067
1068 static void
1069 gtk_path_bar_stop_scrolling (GtkPathBar *path_bar)
1070 {
1071   if (path_bar->timer)
1072     {
1073       g_source_remove (path_bar->timer);
1074       path_bar->timer = 0;
1075       path_bar->need_timer = FALSE;
1076     }
1077 }
1078
1079 static gboolean
1080 gtk_path_bar_slider_up_defocus (GtkWidget      *widget,
1081                                     GdkEventButton *event,
1082                                     GtkPathBar     *path_bar)
1083 {
1084   GList *list;
1085   GList *up_button = NULL;
1086
1087   if (event->type != GDK_FOCUS_CHANGE)
1088     return FALSE;
1089
1090   for (list = g_list_last (path_bar->button_list); list; list = list->prev)
1091     {
1092       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
1093         {
1094           up_button = list;
1095           break;
1096         }
1097     }
1098
1099   /* don't let the focus vanish */
1100   if ((!gtk_widget_is_sensitive (path_bar->up_slider_button)) ||
1101       (!gtk_widget_get_child_visible (path_bar->up_slider_button)))
1102     gtk_widget_grab_focus (BUTTON_DATA (up_button->data)->button);
1103
1104   return FALSE;
1105 }
1106
1107 static gboolean
1108 gtk_path_bar_slider_down_defocus (GtkWidget      *widget,
1109                                     GdkEventButton *event,
1110                                     GtkPathBar     *path_bar)
1111 {
1112   GList *list;
1113   GList *down_button = NULL;
1114
1115   if (event->type != GDK_FOCUS_CHANGE)
1116     return FALSE;
1117
1118   for (list = path_bar->button_list; list; list = list->next)
1119     {
1120       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
1121         {
1122           down_button = list;
1123           break;
1124         }
1125     }
1126
1127   /* don't let the focus vanish */
1128   if ((!gtk_widget_is_sensitive (path_bar->down_slider_button)) ||
1129       (!gtk_widget_get_child_visible (path_bar->down_slider_button)))
1130     gtk_widget_grab_focus (BUTTON_DATA (down_button->data)->button);
1131
1132   return FALSE;
1133 }
1134
1135 static gboolean
1136 gtk_path_bar_slider_button_press (GtkWidget      *widget,
1137                                   GdkEventButton *event,
1138                                   GtkPathBar     *path_bar)
1139 {
1140   if (event->type != GDK_BUTTON_PRESS || event->button != GDK_BUTTON_PRIMARY)
1141     return FALSE;
1142
1143   path_bar->ignore_click = FALSE;
1144
1145   if (widget == path_bar->up_slider_button)
1146     {
1147       path_bar->scrolling_down = FALSE;
1148       path_bar->scrolling_up = TRUE;
1149       gtk_path_bar_scroll_up (path_bar);
1150     }
1151   else if (widget == path_bar->down_slider_button)
1152     {
1153       path_bar->scrolling_up = FALSE;
1154       path_bar->scrolling_down = TRUE;
1155       gtk_path_bar_scroll_down (path_bar);
1156     }
1157
1158   if (!path_bar->timer)
1159     {
1160       GtkSettings *settings = gtk_widget_get_settings (widget);
1161       guint        timeout;
1162
1163       g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
1164
1165       path_bar->need_timer = TRUE;
1166       path_bar->timer = gdk_threads_add_timeout (timeout,
1167                                        (GSourceFunc)gtk_path_bar_scroll_timeout,
1168                                        path_bar);
1169     }
1170
1171   return FALSE;
1172 }
1173
1174 static gboolean
1175 gtk_path_bar_slider_button_release (GtkWidget      *widget,
1176                                     GdkEventButton *event,
1177                                     GtkPathBar     *path_bar)
1178 {
1179   if (event->type != GDK_BUTTON_RELEASE)
1180     return FALSE;
1181
1182   path_bar->ignore_click = TRUE;
1183   gtk_path_bar_stop_scrolling (path_bar);
1184
1185   return FALSE;
1186 }
1187
1188 static void
1189 gtk_path_bar_grab_notify (GtkWidget *widget,
1190                           gboolean   was_grabbed)
1191 {
1192   if (!was_grabbed)
1193     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1194 }
1195
1196 static void
1197 gtk_path_bar_state_changed (GtkWidget    *widget,
1198                             GtkStateType  previous_state)
1199 {
1200   if (!gtk_widget_is_sensitive (widget))
1201     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1202 }
1203
1204
1205 /* Changes the icons wherever it is needed */
1206 static void
1207 reload_icons (GtkPathBar *path_bar)
1208 {
1209   GList *list;
1210
1211   if (path_bar->root_icon)
1212     {
1213       g_object_unref (path_bar->root_icon);
1214       path_bar->root_icon = NULL;
1215     }
1216   if (path_bar->home_icon)
1217     {
1218       g_object_unref (path_bar->home_icon);
1219       path_bar->home_icon = NULL;
1220     }
1221   if (path_bar->desktop_icon)
1222     {
1223       g_object_unref (path_bar->desktop_icon);
1224       path_bar->desktop_icon = NULL;
1225     }
1226
1227   for (list = path_bar->button_list; list; list = list->next)
1228     {
1229       ButtonData *button_data;
1230       gboolean current_dir;
1231
1232       button_data = BUTTON_DATA (list->data);
1233       if (button_data->type != NORMAL_BUTTON)
1234         {
1235           current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button));
1236           gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1237         }
1238     }
1239
1240 }
1241
1242 static void
1243 change_icon_theme (GtkPathBar *path_bar)
1244 {
1245   GtkSettings *settings;
1246   gint width, height;
1247
1248   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1249
1250   if (gtk_icon_size_lookup_for_settings (settings, GTK_ICON_SIZE_MENU, &width, &height))
1251     path_bar->icon_size = MAX (width, height);
1252   else
1253     path_bar->icon_size = FALLBACK_ICON_SIZE;
1254
1255   reload_icons (path_bar);
1256 }
1257 /* Callback used when a GtkSettings value changes */
1258 static void
1259 settings_notify_cb (GObject    *object,
1260                     GParamSpec *pspec,
1261                     GtkPathBar *path_bar)
1262 {
1263   const char *name;
1264
1265   name = g_param_spec_get_name (pspec);
1266
1267   if (! strcmp (name, "gtk-icon-theme-name") ||
1268       ! strcmp (name, "gtk-icon-sizes"))
1269     change_icon_theme (path_bar);
1270 }
1271
1272 static void
1273 gtk_path_bar_check_icon_theme (GtkPathBar *path_bar)
1274 {
1275   GtkSettings *settings;
1276
1277   if (path_bar->settings_signal_id)
1278     return;
1279
1280   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1281   path_bar->settings_signal_id = g_signal_connect (settings, "notify", G_CALLBACK (settings_notify_cb), path_bar);
1282
1283   change_icon_theme (path_bar);
1284 }
1285
1286 /* Public functions and their helpers */
1287 static void
1288 gtk_path_bar_clear_buttons (GtkPathBar *path_bar)
1289 {
1290   while (path_bar->button_list != NULL)
1291     {
1292       gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (path_bar->button_list->data)->button);
1293     }
1294   path_bar->first_scrolled_button = NULL;
1295   path_bar->fake_root = NULL;
1296 }
1297
1298 static void
1299 button_clicked_cb (GtkWidget *button,
1300                    gpointer   data)
1301 {
1302   ButtonData *button_data;
1303   GtkPathBar *path_bar;
1304   GList *button_list;
1305   gboolean child_is_hidden;
1306   GFile *child_file;
1307
1308   button_data = BUTTON_DATA (data);
1309   if (button_data->ignore_changes)
1310     return;
1311
1312   path_bar = GTK_PATH_BAR (gtk_widget_get_parent (button));
1313
1314   button_list = g_list_find (path_bar->button_list, button_data);
1315   g_assert (button_list != NULL);
1316
1317   g_signal_handlers_block_by_func (button,
1318                                    G_CALLBACK (button_clicked_cb), data);
1319   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
1320   g_signal_handlers_unblock_by_func (button,
1321                                      G_CALLBACK (button_clicked_cb), data);
1322
1323   if (button_list->prev)
1324     {
1325       ButtonData *child_data;
1326
1327       child_data = BUTTON_DATA (button_list->prev->data);
1328       child_file = child_data->file;
1329       child_is_hidden = child_data->file_is_hidden;
1330     }
1331   else
1332     {
1333       child_file = NULL;
1334       child_is_hidden = FALSE;
1335     }
1336
1337   g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0,
1338                  button_data->file, child_file, child_is_hidden);
1339 }
1340
1341 struct SetButtonImageData
1342 {
1343   GtkPathBar *path_bar;
1344   ButtonData *button_data;
1345 };
1346
1347 static void
1348 set_button_image_get_info_cb (GCancellable *cancellable,
1349                               GFileInfo    *info,
1350                               const GError *error,
1351                               gpointer      user_data)
1352 {
1353   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1354   GdkPixbuf *pixbuf;
1355   struct SetButtonImageData *data = user_data;
1356
1357   if (cancellable != data->button_data->cancellable)
1358     goto out;
1359
1360   data->button_data->cancellable = NULL;
1361
1362   if (!data->button_data->button)
1363     {
1364       g_free (data->button_data);
1365       goto out;
1366     }
1367
1368   if (cancelled || error)
1369     goto out;
1370
1371   pixbuf = _gtk_file_info_render_icon (info, GTK_WIDGET (data->path_bar),
1372                                        data->path_bar->icon_size);
1373   gtk_image_set_from_pixbuf (GTK_IMAGE (data->button_data->image), pixbuf);
1374
1375   switch (data->button_data->type)
1376     {
1377       case HOME_BUTTON:
1378         if (data->path_bar->home_icon)
1379           g_object_unref (pixbuf);
1380         else
1381           data->path_bar->home_icon = pixbuf;
1382         break;
1383
1384       case DESKTOP_BUTTON:
1385         if (data->path_bar->desktop_icon)
1386           g_object_unref (pixbuf);
1387         else
1388           data->path_bar->desktop_icon = pixbuf;
1389         break;
1390
1391       default:
1392         break;
1393     };
1394
1395 out:
1396   g_free (data);
1397   g_object_unref (cancellable);
1398 }
1399
1400 static void
1401 set_button_image (GtkPathBar *path_bar,
1402                   ButtonData *button_data)
1403 {
1404   GtkFileSystemVolume *volume;
1405   struct SetButtonImageData *data;
1406
1407   switch (button_data->type)
1408     {
1409     case ROOT_BUTTON:
1410
1411       if (path_bar->root_icon != NULL)
1412         {
1413           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1414           break;
1415         }
1416
1417       volume = _gtk_file_system_get_volume_for_file (path_bar->file_system, path_bar->root_file);
1418       if (volume == NULL)
1419         return;
1420
1421       path_bar->root_icon = _gtk_file_system_volume_render_icon (volume,
1422                                                                  GTK_WIDGET (path_bar),
1423                                                                  path_bar->icon_size,
1424                                                                  NULL);
1425       _gtk_file_system_volume_unref (volume);
1426
1427       gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1428       break;
1429
1430     case HOME_BUTTON:
1431       if (path_bar->home_icon != NULL)
1432         {
1433           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->home_icon);
1434           break;
1435         }
1436
1437       data = g_new0 (struct SetButtonImageData, 1);
1438       data->path_bar = path_bar;
1439       data->button_data = button_data;
1440
1441       if (button_data->cancellable)
1442         g_cancellable_cancel (button_data->cancellable);
1443
1444       button_data->cancellable =
1445         _gtk_file_system_get_info (path_bar->file_system,
1446                                    path_bar->home_file,
1447                                    "standard::icon",
1448                                    set_button_image_get_info_cb,
1449                                    data);
1450       break;
1451
1452     case DESKTOP_BUTTON:
1453       if (path_bar->desktop_icon != NULL)
1454         {
1455           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->desktop_icon);
1456           break;
1457         }
1458
1459       data = g_new0 (struct SetButtonImageData, 1);
1460       data->path_bar = path_bar;
1461       data->button_data = button_data;
1462
1463       if (button_data->cancellable)
1464         g_cancellable_cancel (button_data->cancellable);
1465
1466       button_data->cancellable =
1467         _gtk_file_system_get_info (path_bar->file_system,
1468                                    path_bar->desktop_file,
1469                                    "standard::icon",
1470                                    set_button_image_get_info_cb,
1471                                    data);
1472       break;
1473     default:
1474       break;
1475     }
1476 }
1477
1478 static void
1479 button_data_free (ButtonData *button_data)
1480 {
1481   if (button_data->file)
1482     g_object_unref (button_data->file);
1483   button_data->file = NULL;
1484
1485   g_free (button_data->dir_name);
1486   button_data->dir_name = NULL;
1487
1488   button_data->button = NULL;
1489
1490   if (button_data->cancellable)
1491     g_cancellable_cancel (button_data->cancellable);
1492   else
1493     g_free (button_data);
1494 }
1495
1496 static const char *
1497 get_dir_name (ButtonData *button_data)
1498 {
1499   return button_data->dir_name;
1500 }
1501
1502 /* We always want to request the same size for the label, whether
1503  * or not the contents are bold
1504  */
1505 static void
1506 set_label_size_request (GtkWidget  *widget,
1507                         ButtonData *button_data)
1508 {
1509   const gchar *dir_name = get_dir_name (button_data);
1510   PangoLayout *layout = gtk_widget_create_pango_layout (button_data->label, dir_name);
1511   gint width, height, bold_width, bold_height;
1512   gchar *markup;
1513
1514   pango_layout_get_pixel_size (layout, &width, &height);
1515
1516   markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1517   pango_layout_set_markup (layout, markup, -1);
1518   g_free (markup);
1519
1520   pango_layout_get_pixel_size (layout, &bold_width, &bold_height);
1521
1522   gtk_widget_set_size_request (widget,
1523                                MAX (width, bold_width),
1524                                MAX (height, bold_height));
1525   g_object_unref (layout);
1526 }
1527
1528 static void
1529 gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
1530                                        ButtonData *button_data,
1531                                        gboolean    current_dir)
1532 {
1533   const gchar *dir_name = get_dir_name (button_data);
1534
1535   if (button_data->label != NULL)
1536     {
1537       if (current_dir)
1538         {
1539           char *markup;
1540
1541           markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1542           gtk_label_set_markup (GTK_LABEL (button_data->label), markup);
1543           g_free (markup);
1544         }
1545       else
1546         {
1547           gtk_label_set_text (GTK_LABEL (button_data->label), dir_name);
1548         }
1549     }
1550
1551   if (button_data->image != NULL)
1552     {
1553       set_button_image (path_bar, button_data);
1554     }
1555
1556   if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir)
1557     {
1558       button_data->ignore_changes = TRUE;
1559       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir);
1560       button_data->ignore_changes = FALSE;
1561     }
1562 }
1563
1564 static ButtonType
1565 find_button_type (GtkPathBar  *path_bar,
1566                   GFile       *file)
1567 {
1568   if (path_bar->root_file != NULL &&
1569       g_file_equal (file, path_bar->root_file))
1570     return ROOT_BUTTON;
1571   if (path_bar->home_file != NULL &&
1572       g_file_equal (file, path_bar->home_file))
1573     return HOME_BUTTON;
1574   if (path_bar->desktop_file != NULL &&
1575       g_file_equal (file, path_bar->desktop_file))
1576     return DESKTOP_BUTTON;
1577
1578  return NORMAL_BUTTON;
1579 }
1580
1581 static void
1582 button_drag_data_get_cb (GtkWidget        *widget,
1583                          GdkDragContext   *context,
1584                          GtkSelectionData *selection_data,
1585                          guint             info,
1586                          guint             time_,
1587                          gpointer          data)
1588 {
1589   ButtonData *button_data;
1590   char *uris[2];
1591
1592   button_data = data;
1593
1594   uris[0] = g_file_get_uri (button_data->file);
1595   uris[1] = NULL;
1596
1597   gtk_selection_data_set_uris (selection_data, uris);
1598
1599   g_free (uris[0]);
1600 }
1601
1602 static ButtonData *
1603 make_directory_button (GtkPathBar  *path_bar,
1604                        const char  *dir_name,
1605                        GFile       *file,
1606                        gboolean     current_dir,
1607                        gboolean     file_is_hidden)
1608 {
1609   AtkObject *atk_obj;
1610   GtkWidget *child = NULL;
1611   ButtonData *button_data;
1612
1613   file_is_hidden = !! file_is_hidden;
1614   /* Is it a special button? */
1615   button_data = g_new0 (ButtonData, 1);
1616
1617   button_data->type = find_button_type (path_bar, file);
1618   button_data->button = gtk_toggle_button_new ();
1619   atk_obj = gtk_widget_get_accessible (button_data->button);
1620   gtk_button_set_focus_on_click (GTK_BUTTON (button_data->button), FALSE);
1621   gtk_widget_add_events (button_data->button, GDK_SCROLL_MASK);
1622
1623   switch (button_data->type)
1624     {
1625     case ROOT_BUTTON:
1626       button_data->image = gtk_image_new ();
1627       child = button_data->image;
1628       button_data->label = NULL;
1629       atk_object_set_name (atk_obj, _("File System Root"));
1630       break;
1631     case HOME_BUTTON:
1632     case DESKTOP_BUTTON:
1633       button_data->image = gtk_image_new ();
1634       button_data->label = gtk_label_new (NULL);
1635       child = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
1636       gtk_box_pack_start (GTK_BOX (child), button_data->image, FALSE, FALSE, 0);
1637       gtk_box_pack_start (GTK_BOX (child), button_data->label, FALSE, FALSE, 0);
1638       break;
1639     case NORMAL_BUTTON:
1640     default:
1641       button_data->label = gtk_label_new (NULL);
1642       gtk_label_set_ellipsize (GTK_LABEL (button_data->label), PANGO_ELLIPSIZE_END);
1643       child = button_data->label;
1644       button_data->image = NULL;
1645     }
1646
1647   button_data->dir_name = g_strdup (dir_name);
1648   button_data->file = g_object_ref (file);
1649   button_data->file_is_hidden = file_is_hidden;
1650
1651   /*
1652    * The following function ensures that the alignment will always
1653    * request the same size whether the button's text is bold or not.
1654    */
1655   if (button_data->label)
1656     set_label_size_request (button_data->label, button_data);
1657
1658   gtk_container_add (GTK_CONTAINER (button_data->button), child);
1659   gtk_widget_show_all (button_data->button);
1660
1661   gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1662
1663   g_signal_connect (button_data->button, "clicked",
1664                     G_CALLBACK (button_clicked_cb),
1665                     button_data);
1666   g_object_weak_ref (G_OBJECT (button_data->button),
1667                      (GWeakNotify) button_data_free, button_data);
1668
1669   gtk_drag_source_set (button_data->button,
1670                        GDK_BUTTON1_MASK,
1671                        NULL, 0,
1672                        GDK_ACTION_COPY);
1673   gtk_drag_source_add_uri_targets (button_data->button);
1674   g_signal_connect (button_data->button, "drag-data-get",
1675                     G_CALLBACK (button_drag_data_get_cb), button_data);
1676
1677   return button_data;
1678 }
1679
1680 static gboolean
1681 gtk_path_bar_check_parent_path (GtkPathBar         *path_bar,
1682                                 GFile              *file)
1683 {
1684   GList *list;
1685   GList *current_path = NULL;
1686   gboolean need_new_fake_root = FALSE;
1687
1688   for (list = path_bar->button_list; list; list = list->next)
1689     {
1690       ButtonData *button_data;
1691
1692       button_data = list->data;
1693       if (g_file_equal (file, button_data->file))
1694         {
1695           current_path = list;
1696           break;
1697         }
1698       if (list == path_bar->fake_root)
1699         need_new_fake_root = TRUE;
1700     }
1701
1702   if (current_path)
1703     {
1704       if (need_new_fake_root)
1705         {
1706           path_bar->fake_root = NULL;
1707           for (list = current_path; list; list = list->next)
1708             {
1709               ButtonData *button_data;
1710
1711               button_data = list->data;
1712               if (BUTTON_IS_FAKE_ROOT (button_data))
1713                 {
1714                   path_bar->fake_root = list;
1715                   break;
1716                 }
1717             }
1718         }
1719
1720       for (list = path_bar->button_list; list; list = list->next)
1721         {
1722           gtk_path_bar_update_button_appearance (path_bar,
1723                                                  BUTTON_DATA (list->data),
1724                                                  (list == current_path) ? TRUE : FALSE);
1725         }
1726
1727       if (!gtk_widget_get_child_visible (BUTTON_DATA (current_path->data)->button))
1728         {
1729           path_bar->first_scrolled_button = current_path;
1730           gtk_widget_queue_resize (GTK_WIDGET (path_bar));
1731         }
1732
1733       return TRUE;
1734     }
1735   return FALSE;
1736 }
1737
1738
1739 struct SetFileInfo
1740 {
1741   GFile *file;
1742   GFile *parent_file;
1743   GtkPathBar *path_bar;
1744   GList *new_buttons;
1745   GList *fake_root;
1746   gboolean first_directory;
1747 };
1748
1749 static void
1750 gtk_path_bar_set_file_finish (struct SetFileInfo *info,
1751                               gboolean            result)
1752 {
1753   if (result)
1754     {
1755       GList *l;
1756
1757       gtk_path_bar_clear_buttons (info->path_bar);
1758       info->path_bar->button_list = g_list_reverse (info->new_buttons);
1759       info->path_bar->fake_root = info->fake_root;
1760
1761       for (l = info->path_bar->button_list; l; l = l->next)
1762         {
1763           GtkWidget *button = BUTTON_DATA (l->data)->button;
1764           gtk_container_add (GTK_CONTAINER (info->path_bar), button);
1765         }
1766
1767       child_ordering_changed (info->path_bar);
1768     }
1769   else
1770     {
1771       GList *l;
1772
1773       for (l = info->new_buttons; l; l = l->next)
1774         {
1775           ButtonData *button_data;
1776
1777           button_data = BUTTON_DATA (l->data);
1778           gtk_widget_destroy (button_data->button);
1779         }
1780
1781       g_list_free (info->new_buttons);
1782     }
1783
1784   if (info->file)
1785     g_object_unref (info->file);
1786   if (info->parent_file)
1787     g_object_unref (info->parent_file);
1788
1789   g_free (info);
1790 }
1791
1792 static void
1793 gtk_path_bar_get_info_callback (GCancellable *cancellable,
1794                                 GFileInfo    *info,
1795                                 const GError *error,
1796                                 gpointer      data)
1797 {
1798   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1799   struct SetFileInfo *file_info = data;
1800   ButtonData *button_data;
1801   const gchar *display_name;
1802   gboolean is_hidden;
1803
1804   if (cancellable != file_info->path_bar->get_info_cancellable)
1805     {
1806       gtk_path_bar_set_file_finish (file_info, FALSE);
1807       g_object_unref (cancellable);
1808       return;
1809     }
1810
1811   g_object_unref (cancellable);
1812   file_info->path_bar->get_info_cancellable = NULL;
1813
1814   if (cancelled || !info)
1815     {
1816       gtk_path_bar_set_file_finish (file_info, FALSE);
1817       return;
1818     }
1819
1820   display_name = g_file_info_get_display_name (info);
1821   is_hidden = g_file_info_get_is_hidden (info) || g_file_info_get_is_backup (info);
1822
1823   gtk_widget_push_composite_child ();
1824   button_data = make_directory_button (file_info->path_bar, display_name,
1825                                        file_info->file,
1826                                        file_info->first_directory, is_hidden);
1827   gtk_widget_pop_composite_child ();
1828   g_object_unref (file_info->file);
1829
1830   file_info->new_buttons = g_list_prepend (file_info->new_buttons, button_data);
1831
1832   if (BUTTON_IS_FAKE_ROOT (button_data))
1833     file_info->fake_root = file_info->new_buttons;
1834
1835   /* We have assigned the info for the innermost button, i.e. the deepest directory.
1836    * Now, go on to fetch the info for this directory's parent.
1837    */
1838
1839   file_info->file = file_info->parent_file;
1840   file_info->first_directory = FALSE;
1841
1842   if (!file_info->file)
1843     {
1844       /* No parent?  Okay, we are done. */
1845       gtk_path_bar_set_file_finish (file_info, TRUE);
1846       return;
1847     }
1848
1849   file_info->parent_file = g_file_get_parent (file_info->file);
1850
1851   /* Recurse asynchronously */
1852   file_info->path_bar->get_info_cancellable =
1853     _gtk_file_system_get_info (file_info->path_bar->file_system,
1854                                file_info->file,
1855                                "standard::display-name,standard::is-hidden,standard::is-backup",
1856                                gtk_path_bar_get_info_callback,
1857                                file_info);
1858 }
1859
1860 void
1861 _gtk_path_bar_set_file (GtkPathBar      *path_bar,
1862                         GFile           *file,
1863                         const gboolean   keep_trail)
1864 {
1865   struct SetFileInfo *info;
1866
1867   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1868   g_return_if_fail (G_IS_FILE (file));
1869
1870   /* Check whether the new path is already present in the pathbar as buttons.
1871    * This could be a parent directory or a previous selected subdirectory.
1872    */
1873   if (keep_trail && gtk_path_bar_check_parent_path (path_bar, file))
1874     return;
1875
1876   info = g_new0 (struct SetFileInfo, 1);
1877   info->file = g_object_ref (file);
1878   info->path_bar = path_bar;
1879   info->first_directory = TRUE;
1880   info->parent_file = g_file_get_parent (info->file);
1881
1882   if (path_bar->get_info_cancellable)
1883     g_cancellable_cancel (path_bar->get_info_cancellable);
1884
1885   path_bar->get_info_cancellable =
1886     _gtk_file_system_get_info (path_bar->file_system,
1887                                info->file,
1888                                "standard::display-name,standard::is-hidden,standard::is-backup",
1889                                gtk_path_bar_get_info_callback,
1890                                info);
1891 }
1892
1893 /* FIXME: This should be a construct-only property */
1894 void
1895 _gtk_path_bar_set_file_system (GtkPathBar    *path_bar,
1896                                GtkFileSystem *file_system)
1897 {
1898   const char *home;
1899
1900   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1901
1902   g_assert (path_bar->file_system == NULL);
1903
1904   path_bar->file_system = g_object_ref (file_system);
1905
1906   home = g_get_home_dir ();
1907   if (home != NULL)
1908     {
1909       const gchar *desktop;
1910
1911       path_bar->home_file = g_file_new_for_path (home);
1912       /* FIXME: Need file system backend specific way of getting the
1913        * Desktop path.
1914        */
1915       desktop = g_get_user_special_dir (G_USER_DIRECTORY_DESKTOP);
1916       if (desktop != NULL)
1917         path_bar->desktop_file = g_file_new_for_path (desktop);
1918       else
1919         path_bar->desktop_file = NULL;
1920     }
1921   else
1922     {
1923       path_bar->home_file = NULL;
1924       path_bar->desktop_file = NULL;
1925     }
1926   path_bar->root_file = g_file_new_for_path ("/");
1927 }
1928
1929 /**
1930  * _gtk_path_bar_up:
1931  * @path_bar: a #GtkPathBar
1932  *
1933  * If the selected button in the pathbar is not the furthest button "up" (in the
1934  * root direction), act as if the user clicked on the next button up.
1935  **/
1936 void
1937 _gtk_path_bar_up (GtkPathBar *path_bar)
1938 {
1939   GList *l;
1940
1941   for (l = path_bar->button_list; l; l = l->next)
1942     {
1943       GtkWidget *button = BUTTON_DATA (l->data)->button;
1944       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1945         {
1946           if (l->next)
1947             {
1948               GtkWidget *next_button = BUTTON_DATA (l->next->data)->button;
1949               button_clicked_cb (next_button, l->next->data);
1950             }
1951           break;
1952         }
1953     }
1954 }
1955
1956 /**
1957  * _gtk_path_bar_down:
1958  * @path_bar: a #GtkPathBar
1959  *
1960  * If the selected button in the pathbar is not the furthest button "down" (in the
1961  * leaf direction), act as if the user clicked on the next button down.
1962  **/
1963 void
1964 _gtk_path_bar_down (GtkPathBar *path_bar)
1965 {
1966   GList *l;
1967
1968   for (l = path_bar->button_list; l; l = l->next)
1969     {
1970       GtkWidget *button = BUTTON_DATA (l->data)->button;
1971       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1972         {
1973           if (l->prev)
1974             {
1975               GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button;
1976               button_clicked_cb (prev_button, l->prev->data);
1977             }
1978           break;
1979         }
1980     }
1981 }