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