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

   1 /* -*- Mode: C; c-file-style: "gnu"; tab-width: 8 -*- */
   2 /* gtkpathbar.c
   3  * Copyright (C) 2004  Red Hat, Inc.,  Jonathan Blandford <jrb@gnome.org>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include "gtkpathbar.h"
  24
  25 #include <string.h>
  26
  27 #include "gtktogglebutton.h"
  28 #include "gtkalignment.h"
  29 #include "gtkarrow.h"
  30 #include "gtkdnd.h"
  31 #include "gtkimage.h"
  32 #include "gtkintl.h"
  33 #include "gtkicontheme.h"
  34 #include "gtkiconfactory.h"
  35 #include "gtklabel.h"
  36 #include "gtkhbox.h"
  37 #include "gtkmain.h"
  38 #include "gtkmarshalers.h"
  39
  40
  41 enum {
  42   PATH_CLICKED,
  43   LAST_SIGNAL
  44 };
  45
  46 typedef enum {
  47   NORMAL_BUTTON,
  48   ROOT_BUTTON,
  49   HOME_BUTTON,
  50   DESKTOP_BUTTON
  51 } ButtonType;
  52
  53 #define BUTTON_DATA(x) ((ButtonData *)(x))
  54
  55 #define SCROLL_DELAY_FACTOR 5
  56
  57 static guint path_bar_signals [LAST_SIGNAL] = { 0 };
  58
  59 /* Icon size for if we can't get it from the theme */
  60 #define FALLBACK_ICON_SIZE 16
  61
  62 typedef struct _ButtonData ButtonData;
  63
  64 struct _ButtonData
  65 {
  66   GtkWidget *button;
  67   ButtonType type;
  68   char *dir_name;
  69   GFile *file;
  70   GtkWidget *image;
  71   GtkWidget *label;
  72   GCancellable *cancellable;
  73   guint ignore_changes : 1;
  74   guint file_is_hidden : 1;
  75 };
  76 /* This macro is used to check if a button can be used as a fake root.
  77  * All buttons in front of a fake root are automatically hidden when in a
  78  * directory below a fake root and replaced with the "<" arrow button.
  79  */
  80 #define BUTTON_IS_FAKE_ROOT(button) ((button)->type == HOME_BUTTON)
  81
  82 G_DEFINE_TYPE (GtkPathBar, gtk_path_bar, GTK_TYPE_CONTAINER)
  83
  84 static void gtk_path_bar_finalize                 (GObject          *object);
  85 static void gtk_path_bar_dispose                  (GObject          *object);
  86 static void gtk_path_bar_realize                  (GtkWidget        *widget);
  87 static void gtk_path_bar_unrealize                (GtkWidget        *widget);
  88 static void gtk_path_bar_get_preferred_width      (GtkWidget        *widget,
  89                                                    gint             *minimum,
  90                                                    gint             *natural);
  91 static void gtk_path_bar_get_preferred_height     (GtkWidget        *widget,
  92                                                    gint             *minimum,
  93                                                    gint             *natural);
  94 static void gtk_path_bar_map                      (GtkWidget        *widget);
  95 static void gtk_path_bar_unmap                    (GtkWidget        *widget);
  96 static void gtk_path_bar_size_allocate            (GtkWidget        *widget,
  97                                                    GtkAllocation    *allocation);
  98 static void gtk_path_bar_add                      (GtkContainer     *container,
  99                                                    GtkWidget        *widget);
 100 static void gtk_path_bar_remove                   (GtkContainer     *container,
 101                                                    GtkWidget        *widget);
 102 static void gtk_path_bar_forall                   (GtkContainer     *container,
 103                                                    gboolean          include_internals,
 104                                                    GtkCallback       callback,
 105                                                    gpointer          callback_data);
 106 static gboolean gtk_path_bar_scroll               (GtkWidget        *widget,
 107                                                    GdkEventScroll   *event);
 108 static void gtk_path_bar_scroll_up                (GtkPathBar       *path_bar);
 109 static void gtk_path_bar_scroll_down              (GtkPathBar       *path_bar);
 110 static void gtk_path_bar_stop_scrolling           (GtkPathBar       *path_bar);
 111 static gboolean gtk_path_bar_slider_up_defocus    (GtkWidget        *widget,
 112                                                    GdkEventButton   *event,
 113                                                    GtkPathBar       *path_bar);
 114 static gboolean gtk_path_bar_slider_down_defocus  (GtkWidget        *widget,
 115                                                    GdkEventButton   *event,
 116                                                    GtkPathBar       *path_bar);
 117 static gboolean gtk_path_bar_slider_button_press  (GtkWidget        *widget,
 118                                                    GdkEventButton   *event,
 119                                                    GtkPathBar       *path_bar);
 120 static gboolean gtk_path_bar_slider_button_release(GtkWidget        *widget,
 121                                                    GdkEventButton   *event,
 122                                                    GtkPathBar       *path_bar);
 123 static void gtk_path_bar_grab_notify              (GtkWidget        *widget,
 124                                                    gboolean          was_grabbed);
 125 static void gtk_path_bar_state_changed            (GtkWidget        *widget,
 126                                                    GtkStateType      previous_state);
 127 static void gtk_path_bar_style_set                (GtkWidget        *widget,
 128                                                    GtkStyle         *previous_style);
 129 static void gtk_path_bar_screen_changed           (GtkWidget        *widget,
 130                                                    GdkScreen        *previous_screen);
 131 static void gtk_path_bar_check_icon_theme         (GtkPathBar       *path_bar);
 132 static void gtk_path_bar_update_button_appearance (GtkPathBar       *path_bar,
 133                                                    ButtonData       *button_data,
 134                                                    gboolean          current_dir);
 135
 136 static void
 137 on_slider_unmap (GtkWidget  *widget,
 138                  GtkPathBar *path_bar)
 139 {
 140   if (path_bar->timer &&
 141       ((widget == path_bar->up_slider_button && path_bar->scrolling_up) ||
 142        (widget == path_bar->down_slider_button && path_bar->scrolling_down)))
 143     gtk_path_bar_stop_scrolling (path_bar);
 144 }
 145
 146 static GtkWidget *
 147 get_slider_button (GtkPathBar  *path_bar,
 148                    GtkArrowType arrow_type)
 149 {
 150   GtkWidget *button;
 151   AtkObject *atk_obj;
 152
 153   gtk_widget_push_composite_child ();
 154
 155   button = gtk_button_new ();
 156   atk_obj = gtk_widget_get_accessible (button);
 157   if (arrow_type == GTK_ARROW_LEFT)
 158     atk_object_set_name (atk_obj, _("Up Path"));
 159   else
 160     atk_object_set_name (atk_obj, _("Down Path"));
 161
 162   gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE);
 163   gtk_container_add (GTK_CONTAINER (button),
 164                      gtk_arrow_new (arrow_type, GTK_SHADOW_OUT));
 165   gtk_container_add (GTK_CONTAINER (path_bar), button);
 166   gtk_widget_show_all (button);
 167
 168   g_signal_connect (G_OBJECT (button), "unmap",
 169                     G_CALLBACK (on_slider_unmap), path_bar);
 170
 171   gtk_widget_pop_composite_child ();
 172
 173   return button;
 174 }
 175
 176 static void
 177 gtk_path_bar_init (GtkPathBar *path_bar)
 178 {
 179   gtk_widget_set_has_window (GTK_WIDGET (path_bar), FALSE);
 180   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (path_bar), FALSE);
 181
 182   path_bar->get_info_cancellable = NULL;
 183
 184   path_bar->spacing = 0;
 185   path_bar->up_slider_button = get_slider_button (path_bar, GTK_ARROW_LEFT);
 186   path_bar->down_slider_button = get_slider_button (path_bar, GTK_ARROW_RIGHT);
 187   path_bar->icon_size = FALLBACK_ICON_SIZE;
 188
 189   g_signal_connect_swapped (path_bar->up_slider_button, "clicked",
 190                             G_CALLBACK (gtk_path_bar_scroll_up), path_bar);
 191   g_signal_connect_swapped (path_bar->down_slider_button, "clicked",
 192                             G_CALLBACK (gtk_path_bar_scroll_down), path_bar);
 193
 194   g_signal_connect (path_bar->up_slider_button, "focus-out-event",
 195                     G_CALLBACK (gtk_path_bar_slider_up_defocus), path_bar);
 196   g_signal_connect (path_bar->down_slider_button, "focus-out-event",
 197                     G_CALLBACK (gtk_path_bar_slider_down_defocus), path_bar);
 198
 199   g_signal_connect (path_bar->up_slider_button, "button-press-event",
 200                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 201   g_signal_connect (path_bar->up_slider_button, "button-release-event",
 202                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 203   g_signal_connect (path_bar->down_slider_button, "button-press-event",
 204                     G_CALLBACK (gtk_path_bar_slider_button_press), path_bar);
 205   g_signal_connect (path_bar->down_slider_button, "button-release-event",
 206                     G_CALLBACK (gtk_path_bar_slider_button_release), path_bar);
 207 }
 208
 209 static void
 210 gtk_path_bar_class_init (GtkPathBarClass *path_bar_class)
 211 {
 212   GObjectClass *gobject_class;
 213   GtkWidgetClass *widget_class;
 214   GtkContainerClass *container_class;
 215
 216   gobject_class = (GObjectClass *) path_bar_class;
 217   widget_class = (GtkWidgetClass *) path_bar_class;
 218   container_class = (GtkContainerClass *) path_bar_class;
 219
 220   gobject_class->finalize = gtk_path_bar_finalize;
 221   gobject_class->dispose = gtk_path_bar_dispose;
 222
 223   widget_class->get_preferred_width = gtk_path_bar_get_preferred_width;
 224   widget_class->get_preferred_height = gtk_path_bar_get_preferred_height;
 225   widget_class->realize = gtk_path_bar_realize;
 226   widget_class->unrealize = gtk_path_bar_unrealize;
 227   widget_class->map = gtk_path_bar_map;
 228   widget_class->unmap = gtk_path_bar_unmap;
 229   widget_class->size_allocate = gtk_path_bar_size_allocate;
 230   widget_class->style_set = gtk_path_bar_style_set;
 231   widget_class->screen_changed = gtk_path_bar_screen_changed;
 232   widget_class->grab_notify = gtk_path_bar_grab_notify;
 233   widget_class->state_changed = gtk_path_bar_state_changed;
 234   widget_class->scroll_event = gtk_path_bar_scroll;
 235
 236   container_class->add = gtk_path_bar_add;
 237   container_class->forall = gtk_path_bar_forall;
 238   container_class->remove = gtk_path_bar_remove;
 239   gtk_container_class_handle_border_width (container_class);
 240   /* FIXME: */
 241   /*  container_class->child_type = gtk_path_bar_child_type;*/
 242
 243   path_bar_signals [PATH_CLICKED] =
 244     g_signal_new (I_("path-clicked"),
 245                   G_OBJECT_CLASS_TYPE (gobject_class),
 246                   G_SIGNAL_RUN_FIRST,
 247                   G_STRUCT_OFFSET (GtkPathBarClass, path_clicked),
 248                   NULL, NULL,
 249                   _gtk_marshal_VOID__POINTER_POINTER_BOOLEAN,
 250                   G_TYPE_NONE, 3,
 251                   G_TYPE_POINTER,
 252                   G_TYPE_POINTER,
 253                   G_TYPE_BOOLEAN);
 254 }
 255
 256
 257 static void
 258 gtk_path_bar_finalize (GObject *object)
 259 {
 260   GtkPathBar *path_bar;
 261
 262   path_bar = GTK_PATH_BAR (object);
 263
 264   gtk_path_bar_stop_scrolling (path_bar);
 265
 266   g_list_free (path_bar->button_list);
 267   if (path_bar->root_file)
 268     g_object_unref (path_bar->root_file);
 269   if (path_bar->home_file)
 270     g_object_unref (path_bar->home_file);
 271   if (path_bar->desktop_file)
 272     g_object_unref (path_bar->desktop_file);
 273
 274   if (path_bar->root_icon)
 275     g_object_unref (path_bar->root_icon);
 276   if (path_bar->home_icon)
 277     g_object_unref (path_bar->home_icon);
 278   if (path_bar->desktop_icon)
 279     g_object_unref (path_bar->desktop_icon);
 280
 281   if (path_bar->file_system)
 282     g_object_unref (path_bar->file_system);
 283
 284   G_OBJECT_CLASS (gtk_path_bar_parent_class)->finalize (object);
 285 }
 286
 287 /* Removes the settings signal handler.  It's safe to call multiple times */
 288 static void
 289 remove_settings_signal (GtkPathBar *path_bar,
 290                         GdkScreen  *screen)
 291 {
 292   if (path_bar->settings_signal_id)
 293     {
 294       GtkSettings *settings;
 295
 296       settings = gtk_settings_get_for_screen (screen);
 297       g_signal_handler_disconnect (settings,
 298                                    path_bar->settings_signal_id);
 299       path_bar->settings_signal_id = 0;
 300     }
 301 }
 302
 303 static void
 304 gtk_path_bar_dispose (GObject *object)
 305 {
 306   GtkPathBar *path_bar = GTK_PATH_BAR (object);
 307
 308   remove_settings_signal (path_bar, gtk_widget_get_screen (GTK_WIDGET (object)));
 309
 310   if (path_bar->get_info_cancellable)
 311     g_cancellable_cancel (path_bar->get_info_cancellable);
 312   path_bar->get_info_cancellable = NULL;
 313
 314   G_OBJECT_CLASS (gtk_path_bar_parent_class)->dispose (object);
 315 }
 316
 317 /* Size requisition:
 318  *
 319  * Ideally, our size is determined by another widget, and we are just filling
 320  * available space.
 321  */
 322 static void
 323 gtk_path_bar_get_preferred_width (GtkWidget *widget,
 324                                   gint      *minimum,
 325                                   gint      *natural)
 326 {
 327   ButtonData *button_data;
 328   GtkPathBar *path_bar;
 329   GList *list;
 330   gint child_height;
 331   gint height;
 332   gint child_min, child_nat;
 333
 334   path_bar = GTK_PATH_BAR (widget);
 335
 336   *minimum = *natural = 0;
 337   height = 0;
 338
 339   for (list = path_bar->button_list; list; list = list->next)
 340     {
 341       button_data = BUTTON_DATA (list->data);
 342       gtk_widget_get_preferred_width (button_data->button, &child_min, &child_nat);
 343       gtk_widget_get_preferred_height (button_data->button, &child_height, NULL);
 344       height = MAX (height, child_height);
 345
 346       if (button_data->type == NORMAL_BUTTON)
 347         {
 348           /* Use 2*Height as button width because of ellipsized label.  */
 349           child_min = MAX (child_min, child_height * 2);
 350           child_nat = MAX (child_min, child_height * 2);
 351         }
 352
 353       *minimum = MAX (*minimum, child_min);
 354       *natural = MAX (*natural, child_nat);
 355     }
 356
 357   /* Add space for slider, if we have more than one path */
 358   /* Theoretically, the slider could be bigger than the other button.  But we're
 359    * not going to worry about that now.
 360    */
 361   path_bar->slider_width = MIN (height * 2 / 3 + 5, height);
 362   if (path_bar->button_list && path_bar->button_list->next != NULL)
 363     {
 364       *minimum += (path_bar->spacing + path_bar->slider_width) * 2;
 365       *natural += (path_bar->spacing + path_bar->slider_width) * 2;
 366     }
 367 }
 368
 369 static void
 370 gtk_path_bar_get_preferred_height (GtkWidget *widget,
 371                                    gint      *minimum,
 372                                    gint      *natural)
 373 {
 374   ButtonData *button_data;
 375   GtkPathBar *path_bar;
 376   GList *list;
 377   gint child_min, child_nat;
 378
 379   path_bar = GTK_PATH_BAR (widget);
 380
 381   *minimum = *natural = 0;
 382
 383   for (list = path_bar->button_list; list; list = list->next)
 384     {
 385       button_data = BUTTON_DATA (list->data);
 386       gtk_widget_get_preferred_height (button_data->button, &child_min, &child_nat);
 387
 388       *minimum = MAX (*minimum, child_min);
 389       *natural = MAX (*natural, child_nat);
 390     }
 391 }
 392
 393 static void
 394 gtk_path_bar_update_slider_buttons (GtkPathBar *path_bar)
 395 {
 396   if (path_bar->button_list)
 397     {
 398       GtkWidget *button;
 399
 400       button = BUTTON_DATA (path_bar->button_list->data)->button;
 401       if (gtk_widget_get_child_visible (button))
 402         {
 403           gtk_path_bar_stop_scrolling (path_bar);
 404           gtk_widget_set_sensitive (path_bar->down_slider_button, FALSE);
 405         }
 406       else
 407         gtk_widget_set_sensitive (path_bar->down_slider_button, TRUE);
 408
 409       button = BUTTON_DATA (g_list_last (path_bar->button_list)->data)->button;
 410       if (gtk_widget_get_child_visible (button))
 411         {
 412           gtk_path_bar_stop_scrolling (path_bar);
 413           gtk_widget_set_sensitive (path_bar->up_slider_button, FALSE);
 414         }
 415       else
 416         gtk_widget_set_sensitive (path_bar->up_slider_button, TRUE);
 417     }
 418 }
 419
 420 static void
 421 gtk_path_bar_map (GtkWidget *widget)
 422 {
 423   gdk_window_show (GTK_PATH_BAR (widget)->event_window);
 424
 425   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->map (widget);
 426 }
 427
 428 static void
 429 gtk_path_bar_unmap (GtkWidget *widget)
 430 {
 431   gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
 432   gdk_window_hide (GTK_PATH_BAR (widget)->event_window);
 433
 434   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unmap (widget);
 435 }
 436
 437 static void
 438 gtk_path_bar_realize (GtkWidget *widget)
 439 {
 440   GtkPathBar *path_bar;
 441   GtkAllocation allocation;
 442   GdkWindow *window;
 443   GdkWindowAttr attributes;
 444   gint attributes_mask;
 445
 446   gtk_widget_set_realized (widget, TRUE);
 447
 448   path_bar = GTK_PATH_BAR (widget);
 449   window = gtk_widget_get_parent_window (widget);
 450   gtk_widget_set_window (widget, window);
 451   g_object_ref (window);
 452
 453   gtk_widget_get_allocation (widget, &allocation);
 454
 455   attributes.window_type = GDK_WINDOW_CHILD;
 456   attributes.x = allocation.x;
 457   attributes.y = allocation.y;
 458   attributes.width = allocation.width;
 459   attributes.height = allocation.height;
 460   attributes.wclass = GDK_INPUT_ONLY;
 461   attributes.event_mask = gtk_widget_get_events (widget);
 462   attributes.event_mask |= GDK_SCROLL_MASK;
 463   attributes_mask = GDK_WA_X | GDK_WA_Y;
 464
 465   path_bar->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
 466                                            &attributes, attributes_mask);
 467   gdk_window_set_user_data (path_bar->event_window, widget);
 468
 469   gtk_widget_style_attach (widget);
 470 }
 471
 472 static void
 473 gtk_path_bar_unrealize (GtkWidget *widget)
 474 {
 475   GtkPathBar *path_bar;
 476
 477   path_bar = GTK_PATH_BAR (widget);
 478
 479   gdk_window_set_user_data (path_bar->event_window, NULL);
 480   gdk_window_destroy (path_bar->event_window);
 481   path_bar->event_window = NULL;
 482
 483   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unrealize (widget);
 484 }
 485
 486 /* This is a tad complicated
 487  */
 488 static void
 489 gtk_path_bar_size_allocate (GtkWidget     *widget,
 490                             GtkAllocation *allocation)
 491 {
 492   GtkWidget *child;
 493   GtkPathBar *path_bar = GTK_PATH_BAR (widget);
 494   GtkTextDirection direction;
 495   GtkAllocation child_allocation;
 496   GList *list, *first_button;
 497   gint width;
 498   gint allocation_width;
 499   gboolean need_sliders = FALSE;
 500   gint up_slider_offset = 0;
 501   GtkRequisition child_requisition;
 502
 503   gtk_widget_set_allocation (widget, allocation);
 504
 505   if (gtk_widget_get_realized (widget))
 506     gdk_window_move_resize (path_bar->event_window,
 507                             allocation->x, allocation->y,
 508                             allocation->width, allocation->height);
 509
 510   /* No path is set; we don't have to allocate anything. */
 511   if (path_bar->button_list == NULL)
 512     return;
 513
 514   direction = gtk_widget_get_direction (widget);
 515   allocation_width = allocation->width;
 516
 517   /* First, we check to see if we need the scrollbars. */
 518   if (path_bar->fake_root)
 519     width = path_bar->spacing + path_bar->slider_width;
 520   else
 521     width = 0;
 522
 523   for (list = path_bar->button_list; list; list = list->next)
 524     {
 525       child = BUTTON_DATA (list->data)->button;
 526
 527       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 528
 529       width += child_requisition.width + path_bar->spacing;
 530       if (list == path_bar->fake_root)
 531         break;
 532     }
 533
 534   if (width <= allocation_width)
 535     {
 536       if (path_bar->fake_root)
 537         first_button = path_bar->fake_root;
 538       else
 539         first_button = g_list_last (path_bar->button_list);
 540     }
 541   else
 542     {
 543       gboolean reached_end = FALSE;
 544       gint slider_space = 2 * (path_bar->spacing + path_bar->slider_width);
 545
 546       if (path_bar->first_scrolled_button)
 547         first_button = path_bar->first_scrolled_button;
 548       else
 549         first_button = path_bar->button_list;
 550       need_sliders = TRUE;
 551
 552       /* To see how much space we have, and how many buttons we can display.
 553        * We start at the first button, count forward until hit the new
 554        * button, then count backwards.
 555        */
 556       /* Count down the path chain towards the end. */
 557       gtk_widget_get_preferred_size (BUTTON_DATA (first_button->data)->button,
 558                                      &child_requisition, NULL);
 559
 560       width = child_requisition.width;
 561       list = first_button->prev;
 562       while (list && !reached_end)
 563         {
 564           child = BUTTON_DATA (list->data)->button;
 565
 566           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 567
 568           if (width + child_requisition.width +
 569               path_bar->spacing + slider_space > allocation_width)
 570             reached_end = TRUE;
 571           else if (list == path_bar->fake_root)
 572             break;
 573           else
 574             width += child_requisition.width + path_bar->spacing;
 575
 576           list = list->prev;
 577         }
 578
 579       /* Finally, we walk up, seeing how many of the previous buttons we can
 580        * add */
 581       while (first_button->next && !reached_end)
 582         {
 583           child = BUTTON_DATA (first_button->next->data)->button;
 584
 585           gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 586
 587           if (width + child_requisition.width + path_bar->spacing + slider_space > allocation_width)
 588             {
 589               reached_end = TRUE;
 590             }
 591           else
 592             {
 593               width += child_requisition.width + path_bar->spacing;
 594               if (first_button == path_bar->fake_root)
 595                 break;
 596               first_button = first_button->next;
 597             }
 598         }
 599     }
 600
 601   /* Now, we allocate space to the buttons */
 602   child_allocation.y = allocation->y;
 603   child_allocation.height = allocation->height;
 604
 605   if (direction == GTK_TEXT_DIR_RTL)
 606     {
 607       child_allocation.x = allocation->x + allocation->width;
 608       if (need_sliders || path_bar->fake_root)
 609         {
 610           child_allocation.x -= (path_bar->spacing + path_bar->slider_width);
 611           up_slider_offset = allocation->width - path_bar->slider_width;
 612         }
 613     }
 614   else
 615     {
 616       child_allocation.x = allocation->x;
 617       if (need_sliders || path_bar->fake_root)
 618         {
 619           up_slider_offset = 0;
 620           child_allocation.x += (path_bar->spacing + path_bar->slider_width);
 621         }
 622     }
 623
 624   for (list = first_button; list; list = list->prev)
 625     {
 626       GtkAllocation widget_allocation;
 627       ButtonData *button_data;
 628
 629       button_data = BUTTON_DATA (list->data);
 630       child = button_data->button;
 631
 632       gtk_widget_get_preferred_size (child, &child_requisition, NULL);
 633
 634       child_allocation.width = MIN (child_requisition.width,
 635                                     allocation_width - (path_bar->spacing + path_bar->slider_width) * 2);
 636
 637       if (direction == GTK_TEXT_DIR_RTL)
 638         child_allocation.x -= child_allocation.width;
 639
 640       /* Check to see if we've don't have any more space to allocate buttons */
 641       if (need_sliders && direction == GTK_TEXT_DIR_RTL)
 642         {
 643           gtk_widget_get_allocation (widget, &widget_allocation);
 644           if (child_allocation.x - path_bar->spacing - path_bar->slider_width < widget_allocation.x)
 645             break;
 646         }
 647       else if (need_sliders && direction == GTK_TEXT_DIR_LTR)
 648         {
 649           gtk_widget_get_allocation (widget, &widget_allocation);
 650           if (child_allocation.x + child_allocation.width + path_bar->spacing + path_bar->slider_width >
 651               widget_allocation.x + allocation_width)
 652             break;
 653         }
 654
 655       if (child_allocation.width < child_requisition.width)
 656         {
 657           if (!gtk_widget_get_has_tooltip (child))
 658             gtk_widget_set_tooltip_text (child, button_data->dir_name);
 659         }
 660       else if (gtk_widget_get_has_tooltip (child))
 661         gtk_widget_set_tooltip_text (child, NULL);
 662
 663       gtk_widget_set_child_visible (child, TRUE);
 664       gtk_widget_size_allocate (child, &child_allocation);
 665
 666       if (direction == GTK_TEXT_DIR_RTL)
 667         child_allocation.x -= path_bar->spacing;
 668       else
 669         child_allocation.x += child_allocation.width + path_bar->spacing;
 670     }
 671   /* Now we go hide all the widgets that don't fit */
 672   while (list)
 673     {
 674       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 675       list = list->prev;
 676     }
 677   for (list = first_button->next; list; list = list->next)
 678     {
 679       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 680     }
 681
 682   if (need_sliders || path_bar->fake_root)
 683     {
 684       child_allocation.width = path_bar->slider_width;
 685       child_allocation.x = up_slider_offset + allocation->x;
 686       gtk_widget_size_allocate (path_bar->up_slider_button, &child_allocation);
 687
 688       gtk_widget_set_child_visible (path_bar->up_slider_button, TRUE);
 689       gtk_widget_show_all (path_bar->up_slider_button);
 690     }
 691   else
 692     gtk_widget_set_child_visible (path_bar->up_slider_button, FALSE);
 693
 694   if (need_sliders)
 695     {
 696       child_allocation.width = path_bar->slider_width;
 697
 698       if (direction == GTK_TEXT_DIR_RTL)
 699         child_allocation.x = 0;
 700       else
 701         child_allocation.x = allocation->width - path_bar->slider_width;
 702
 703       child_allocation.x += allocation->x;
 704
 705       gtk_widget_size_allocate (path_bar->down_slider_button, &child_allocation);
 706
 707       gtk_widget_set_child_visible (path_bar->down_slider_button, TRUE);
 708       gtk_widget_show_all (path_bar->down_slider_button);
 709       gtk_path_bar_update_slider_buttons (path_bar);
 710     }
 711   else
 712     gtk_widget_set_child_visible (path_bar->down_slider_button, FALSE);
 713 }
 714
 715 static void
 716 gtk_path_bar_style_set (GtkWidget *widget,
 717                         GtkStyle  *previous_style)
 718 {
 719   GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_set (widget, previous_style);
 720
 721   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 722 }
 723
 724 static void
 725 gtk_path_bar_screen_changed (GtkWidget *widget,
 726                              GdkScreen *previous_screen)
 727 {
 728   if (GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed)
 729     GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed (widget, previous_screen);
 730
 731   /* We might nave a new settings, so we remove the old one */
 732   if (previous_screen)
 733     remove_settings_signal (GTK_PATH_BAR (widget), previous_screen);
 734
 735   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 736 }
 737
 738 static gboolean
 739 gtk_path_bar_scroll (GtkWidget      *widget,
 740                      GdkEventScroll *event)
 741 {
 742   switch (event->direction)
 743     {
 744     case GDK_SCROLL_RIGHT:
 745     case GDK_SCROLL_DOWN:
 746       gtk_path_bar_scroll_down (GTK_PATH_BAR (widget));
 747       break;
 748     case GDK_SCROLL_LEFT:
 749     case GDK_SCROLL_UP:
 750       gtk_path_bar_scroll_up (GTK_PATH_BAR (widget));
 751       break;
 752     }
 753
 754   return TRUE;
 755 }
 756
 757 static void
 758 gtk_path_bar_add (GtkContainer *container,
 759                   GtkWidget    *widget)
 760 {
 761   gtk_widget_set_parent (widget, GTK_WIDGET (container));
 762 }
 763
 764 static void
 765 gtk_path_bar_remove_1 (GtkContainer *container,
 766                        GtkWidget    *widget)
 767 {
 768   gboolean was_visible = gtk_widget_get_visible (widget);
 769   gtk_widget_unparent (widget);
 770   if (was_visible)
 771     gtk_widget_queue_resize (GTK_WIDGET (container));
 772 }
 773
 774 static void
 775 gtk_path_bar_remove (GtkContainer *container,
 776                      GtkWidget    *widget)
 777 {
 778   GtkPathBar *path_bar;
 779   GList *children;
 780
 781   path_bar = GTK_PATH_BAR (container);
 782
 783   if (widget == path_bar->up_slider_button)
 784     {
 785       gtk_path_bar_remove_1 (container, widget);
 786       path_bar->up_slider_button = NULL;
 787       return;
 788     }
 789
 790   if (widget == path_bar->down_slider_button)
 791     {
 792       gtk_path_bar_remove_1 (container, widget);
 793       path_bar->down_slider_button = NULL;
 794       return;
 795     }
 796
 797   children = path_bar->button_list;
 798   while (children)
 799     {
 800       if (widget == BUTTON_DATA (children->data)->button)
 801         {
 802           gtk_path_bar_remove_1 (container, widget);
 803           path_bar->button_list = g_list_remove_link (path_bar->button_list, children);
 804           g_list_free (children);
 805           return;
 806         }
 807
 808       children = children->next;
 809     }
 810 }
 811
 812 static void
 813 gtk_path_bar_forall (GtkContainer *container,
 814                      gboolean      include_internals,
 815                      GtkCallback   callback,
 816                      gpointer      callback_data)
 817 {
 818   GtkPathBar *path_bar;
 819   GList *children;
 820
 821   g_return_if_fail (callback != NULL);
 822   path_bar = GTK_PATH_BAR (container);
 823
 824   children = path_bar->button_list;
 825   while (children)
 826     {
 827       GtkWidget *child;
 828       child = BUTTON_DATA (children->data)->button;
 829       children = children->next;
 830
 831       (* callback) (child, callback_data);
 832     }
 833
 834   if (path_bar->up_slider_button)
 835     (* callback) (path_bar->up_slider_button, callback_data);
 836
 837   if (path_bar->down_slider_button)
 838     (* callback) (path_bar->down_slider_button, callback_data);
 839 }
 840
 841 static void
 842 gtk_path_bar_scroll_down (GtkPathBar *path_bar)
 843 {
 844   GtkAllocation allocation, button_allocation;
 845   GList *list;
 846   GList *down_button = NULL;
 847   gint space_available;
 848
 849   if (path_bar->ignore_click)
 850     {
 851       path_bar->ignore_click = FALSE;
 852       return;
 853     }
 854
 855   if (gtk_widget_get_child_visible (BUTTON_DATA (path_bar->button_list->data)->button))
 856     {
 857       /* Return if the last button is already visible */
 858       return;
 859     }
 860
 861   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 862
 863   /* We find the button at the 'down' end that we have to make
 864    * visible */
 865   for (list = path_bar->button_list; list; list = list->next)
 866     {
 867       if (list->next && gtk_widget_get_child_visible (BUTTON_DATA (list->next->data)->button))
 868         {
 869           down_button = list;
 870           break;
 871         }
 872     }
 873
 874   gtk_widget_get_allocation (GTK_WIDGET (path_bar), &allocation);
 875   gtk_widget_get_allocation (BUTTON_DATA (down_button->data)->button, &button_allocation);
 876
 877   space_available = (allocation.width
 878                      - 2 * path_bar->spacing - 2 * path_bar->slider_width
 879                      - button_allocation.width);
 880   path_bar->first_scrolled_button = down_button;
 881
 882   /* We have space_available free space that's not being used.
 883    * So we walk down from the end, adding buttons until we use all free space.
 884    */
 885   while (space_available > 0)
 886     {
 887       path_bar->first_scrolled_button = down_button;
 888       down_button = down_button->next;
 889       if (!down_button)
 890         break;
 891       space_available -= (button_allocation.width
 892                           + path_bar->spacing);
 893     }
 894 }
 895
 896 static void
 897 gtk_path_bar_scroll_up (GtkPathBar *path_bar)
 898 {
 899   GList *list;
 900
 901   if (path_bar->ignore_click)
 902     {
 903       path_bar->ignore_click = FALSE;
 904       return;
 905     }
 906
 907   list = g_list_last (path_bar->button_list);
 908
 909   if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
 910     {
 911       /* Return if the first button is already visible */
 912       return;
 913     }
 914
 915   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 916
 917   for ( ; list; list = list->prev)
 918     {
 919       if (list->prev && gtk_widget_get_child_visible (BUTTON_DATA (list->prev->data)->button))
 920         {
 921           if (list->prev == path_bar->fake_root)
 922             path_bar->fake_root = NULL;
 923           path_bar->first_scrolled_button = list;
 924           return;
 925         }
 926     }
 927 }
 928
 929 static gboolean
 930 gtk_path_bar_scroll_timeout (GtkPathBar *path_bar)
 931 {
 932   gboolean retval = FALSE;
 933
 934   if (path_bar->timer)
 935     {
 936       if (path_bar->scrolling_up)
 937         gtk_path_bar_scroll_up (path_bar);
 938       else if (path_bar->scrolling_down)
 939         gtk_path_bar_scroll_down (path_bar);
 940
 941       if (path_bar->need_timer)
 942         {
 943           GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (path_bar));
 944           guint        timeout;
 945
 946           g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL);
 947
 948           path_bar->need_timer = FALSE;
 949
 950           path_bar->timer = gdk_threads_add_timeout (timeout * SCROLL_DELAY_FACTOR,
 951                                            (GSourceFunc)gtk_path_bar_scroll_timeout,
 952                                            path_bar);
 953         }
 954       else
 955         retval = TRUE;
 956     }
 957
 958   return retval;
 959 }
 960
 961 static void
 962 gtk_path_bar_stop_scrolling (GtkPathBar *path_bar)
 963 {
 964   if (path_bar->timer)
 965     {
 966       g_source_remove (path_bar->timer);
 967       path_bar->timer = 0;
 968       path_bar->need_timer = FALSE;
 969     }
 970 }
 971
 972 static gboolean
 973 gtk_path_bar_slider_up_defocus (GtkWidget      *widget,
 974                                     GdkEventButton *event,
 975                                     GtkPathBar     *path_bar)
 976 {
 977   GList *list;
 978   GList *up_button = NULL;
 979
 980   if (event->type != GDK_FOCUS_CHANGE)
 981     return FALSE;
 982
 983   for (list = g_list_last (path_bar->button_list); list; list = list->prev)
 984     {
 985       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
 986         {
 987           up_button = list;
 988           break;
 989         }
 990     }
 991
 992   /* don't let the focus vanish */
 993   if ((!gtk_widget_is_sensitive (path_bar->up_slider_button)) ||
 994       (!gtk_widget_get_child_visible (path_bar->up_slider_button)))
 995     gtk_widget_grab_focus (BUTTON_DATA (up_button->data)->button);
 996
 997   return FALSE;
 998 }
 999
1000 static gboolean
1001 gtk_path_bar_slider_down_defocus (GtkWidget      *widget,
1002                                     GdkEventButton *event,
1003                                     GtkPathBar     *path_bar)
1004 {
1005   GList *list;
1006   GList *down_button = NULL;
1007
1008   if (event->type != GDK_FOCUS_CHANGE)
1009     return FALSE;
1010
1011   for (list = path_bar->button_list; list; list = list->next)
1012     {
1013       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
1014         {
1015           down_button = list;
1016           break;
1017         }
1018     }
1019
1020   /* don't let the focus vanish */
1021   if ((!gtk_widget_is_sensitive (path_bar->down_slider_button)) ||
1022       (!gtk_widget_get_child_visible (path_bar->down_slider_button)))
1023     gtk_widget_grab_focus (BUTTON_DATA (down_button->data)->button);
1024
1025   return FALSE;
1026 }
1027
1028 static gboolean
1029 gtk_path_bar_slider_button_press (GtkWidget      *widget,
1030                                   GdkEventButton *event,
1031                                   GtkPathBar     *path_bar)
1032 {
1033   if (event->type != GDK_BUTTON_PRESS || event->button != 1)
1034     return FALSE;
1035
1036   path_bar->ignore_click = FALSE;
1037
1038   if (widget == path_bar->up_slider_button)
1039     {
1040       path_bar->scrolling_down = FALSE;
1041       path_bar->scrolling_up = TRUE;
1042       gtk_path_bar_scroll_up (path_bar);
1043     }
1044   else if (widget == path_bar->down_slider_button)
1045     {
1046       path_bar->scrolling_up = FALSE;
1047       path_bar->scrolling_down = TRUE;
1048       gtk_path_bar_scroll_down (path_bar);
1049     }
1050
1051   if (!path_bar->timer)
1052     {
1053       GtkSettings *settings = gtk_widget_get_settings (widget);
1054       guint        timeout;
1055
1056       g_object_get (settings, "gtk-timeout-initial", &timeout, NULL);
1057
1058       path_bar->need_timer = TRUE;
1059       path_bar->timer = gdk_threads_add_timeout (timeout,
1060                                        (GSourceFunc)gtk_path_bar_scroll_timeout,
1061                                        path_bar);
1062     }
1063
1064   return FALSE;
1065 }
1066
1067 static gboolean
1068 gtk_path_bar_slider_button_release (GtkWidget      *widget,
1069                                     GdkEventButton *event,
1070                                     GtkPathBar     *path_bar)
1071 {
1072   if (event->type != GDK_BUTTON_RELEASE)
1073     return FALSE;
1074
1075   path_bar->ignore_click = TRUE;
1076   gtk_path_bar_stop_scrolling (path_bar);
1077
1078   return FALSE;
1079 }
1080
1081 static void
1082 gtk_path_bar_grab_notify (GtkWidget *widget,
1083                           gboolean   was_grabbed)
1084 {
1085   if (!was_grabbed)
1086     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1087 }
1088
1089 static void
1090 gtk_path_bar_state_changed (GtkWidget    *widget,
1091                             GtkStateType  previous_state)
1092 {
1093   if (!gtk_widget_is_sensitive (widget))
1094     gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget));
1095 }
1096
1097
1098 /* Changes the icons wherever it is needed */
1099 static void
1100 reload_icons (GtkPathBar *path_bar)
1101 {
1102   GList *list;
1103
1104   if (path_bar->root_icon)
1105     {
1106       g_object_unref (path_bar->root_icon);
1107       path_bar->root_icon = NULL;
1108     }
1109   if (path_bar->home_icon)
1110     {
1111       g_object_unref (path_bar->home_icon);
1112       path_bar->home_icon = NULL;
1113     }
1114   if (path_bar->desktop_icon)
1115     {
1116       g_object_unref (path_bar->desktop_icon);
1117       path_bar->desktop_icon = NULL;
1118     }
1119
1120   for (list = path_bar->button_list; list; list = list->next)
1121     {
1122       ButtonData *button_data;
1123       gboolean current_dir;
1124
1125       button_data = BUTTON_DATA (list->data);
1126       if (button_data->type != NORMAL_BUTTON)
1127         {
1128           current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button));
1129           gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1130         }
1131     }
1132
1133 }
1134
1135 static void
1136 change_icon_theme (GtkPathBar *path_bar)
1137 {
1138   GtkSettings *settings;
1139   gint width, height;
1140
1141   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1142
1143   if (gtk_icon_size_lookup_for_settings (settings, GTK_ICON_SIZE_MENU, &width, &height))
1144     path_bar->icon_size = MAX (width, height);
1145   else
1146     path_bar->icon_size = FALLBACK_ICON_SIZE;
1147
1148   reload_icons (path_bar);
1149 }
1150 /* Callback used when a GtkSettings value changes */
1151 static void
1152 settings_notify_cb (GObject    *object,
1153                     GParamSpec *pspec,
1154                     GtkPathBar *path_bar)
1155 {
1156   const char *name;
1157
1158   name = g_param_spec_get_name (pspec);
1159
1160   if (! strcmp (name, "gtk-icon-theme-name") ||
1161       ! strcmp (name, "gtk-icon-sizes"))
1162     change_icon_theme (path_bar);
1163 }
1164
1165 static void
1166 gtk_path_bar_check_icon_theme (GtkPathBar *path_bar)
1167 {
1168   GtkSettings *settings;
1169
1170   if (path_bar->settings_signal_id)
1171     return;
1172
1173   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
1174   path_bar->settings_signal_id = g_signal_connect (settings, "notify", G_CALLBACK (settings_notify_cb), path_bar);
1175
1176   change_icon_theme (path_bar);
1177 }
1178
1179 /* Public functions and their helpers */
1180 static void
1181 gtk_path_bar_clear_buttons (GtkPathBar *path_bar)
1182 {
1183   while (path_bar->button_list != NULL)
1184     {
1185       gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (path_bar->button_list->data)->button);
1186     }
1187   path_bar->first_scrolled_button = NULL;
1188   path_bar->fake_root = NULL;
1189 }
1190
1191 static void
1192 button_clicked_cb (GtkWidget *button,
1193                    gpointer   data)
1194 {
1195   ButtonData *button_data;
1196   GtkPathBar *path_bar;
1197   GList *button_list;
1198   gboolean child_is_hidden;
1199   GFile *child_file;
1200
1201   button_data = BUTTON_DATA (data);
1202   if (button_data->ignore_changes)
1203     return;
1204
1205   path_bar = GTK_PATH_BAR (gtk_widget_get_parent (button));
1206
1207   button_list = g_list_find (path_bar->button_list, button_data);
1208   g_assert (button_list != NULL);
1209
1210   g_signal_handlers_block_by_func (button,
1211                                    G_CALLBACK (button_clicked_cb), data);
1212   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
1213   g_signal_handlers_unblock_by_func (button,
1214                                      G_CALLBACK (button_clicked_cb), data);
1215
1216   if (button_list->prev)
1217     {
1218       ButtonData *child_data;
1219
1220       child_data = BUTTON_DATA (button_list->prev->data);
1221       child_file = child_data->file;
1222       child_is_hidden = child_data->file_is_hidden;
1223     }
1224   else
1225     {
1226       child_file = NULL;
1227       child_is_hidden = FALSE;
1228     }
1229
1230   g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0,
1231                  button_data->file, child_file, child_is_hidden);
1232 }
1233
1234 struct SetButtonImageData
1235 {
1236   GtkPathBar *path_bar;
1237   ButtonData *button_data;
1238 };
1239
1240 static void
1241 set_button_image_get_info_cb (GCancellable *cancellable,
1242                               GFileInfo    *info,
1243                               const GError *error,
1244                               gpointer      user_data)
1245 {
1246   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1247   GdkPixbuf *pixbuf;
1248   struct SetButtonImageData *data = user_data;
1249
1250   if (cancellable != data->button_data->cancellable)
1251     goto out;
1252
1253   data->button_data->cancellable = NULL;
1254
1255   if (!data->button_data->button)
1256     {
1257       g_free (data->button_data);
1258       goto out;
1259     }
1260
1261   if (cancelled || error)
1262     goto out;
1263
1264   pixbuf = _gtk_file_info_render_icon (info, GTK_WIDGET (data->path_bar),
1265                                        data->path_bar->icon_size);
1266   gtk_image_set_from_pixbuf (GTK_IMAGE (data->button_data->image), pixbuf);
1267
1268   switch (data->button_data->type)
1269     {
1270       case HOME_BUTTON:
1271         if (data->path_bar->home_icon)
1272           g_object_unref (pixbuf);
1273         else
1274           data->path_bar->home_icon = pixbuf;
1275         break;
1276
1277       case DESKTOP_BUTTON:
1278         if (data->path_bar->desktop_icon)
1279           g_object_unref (pixbuf);
1280         else
1281           data->path_bar->desktop_icon = pixbuf;
1282         break;
1283
1284       default:
1285         break;
1286     };
1287
1288 out:
1289   g_free (data);
1290   g_object_unref (cancellable);
1291 }
1292
1293 static void
1294 set_button_image (GtkPathBar *path_bar,
1295                   ButtonData *button_data)
1296 {
1297   GtkFileSystemVolume *volume;
1298   struct SetButtonImageData *data;
1299
1300   switch (button_data->type)
1301     {
1302     case ROOT_BUTTON:
1303
1304       if (path_bar->root_icon != NULL)
1305         {
1306           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1307           break;
1308         }
1309
1310       volume = _gtk_file_system_get_volume_for_file (path_bar->file_system, path_bar->root_file);
1311       if (volume == NULL)
1312         return;
1313
1314       path_bar->root_icon = _gtk_file_system_volume_render_icon (volume,
1315                                                                  GTK_WIDGET (path_bar),
1316                                                                  path_bar->icon_size,
1317                                                                  NULL);
1318       _gtk_file_system_volume_unref (volume);
1319
1320       gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon);
1321       break;
1322
1323     case HOME_BUTTON:
1324       if (path_bar->home_icon != NULL)
1325         {
1326           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->home_icon);
1327           break;
1328         }
1329
1330       data = g_new0 (struct SetButtonImageData, 1);
1331       data->path_bar = path_bar;
1332       data->button_data = button_data;
1333
1334       if (button_data->cancellable)
1335         g_cancellable_cancel (button_data->cancellable);
1336
1337       button_data->cancellable =
1338         _gtk_file_system_get_info (path_bar->file_system,
1339                                    path_bar->home_file,
1340                                    "standard::icon",
1341                                    set_button_image_get_info_cb,
1342                                    data);
1343       break;
1344
1345     case DESKTOP_BUTTON:
1346       if (path_bar->desktop_icon != NULL)
1347         {
1348           gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->desktop_icon);
1349           break;
1350         }
1351
1352       data = g_new0 (struct SetButtonImageData, 1);
1353       data->path_bar = path_bar;
1354       data->button_data = button_data;
1355
1356       if (button_data->cancellable)
1357         g_cancellable_cancel (button_data->cancellable);
1358
1359       button_data->cancellable =
1360         _gtk_file_system_get_info (path_bar->file_system,
1361                                    path_bar->desktop_file,
1362                                    "standard::icon",
1363                                    set_button_image_get_info_cb,
1364                                    data);
1365       break;
1366     default:
1367       break;
1368     }
1369 }
1370
1371 static void
1372 button_data_free (ButtonData *button_data)
1373 {
1374   if (button_data->file)
1375     g_object_unref (button_data->file);
1376   button_data->file = NULL;
1377
1378   g_free (button_data->dir_name);
1379   button_data->dir_name = NULL;
1380
1381   button_data->button = NULL;
1382
1383   if (button_data->cancellable)
1384     g_cancellable_cancel (button_data->cancellable);
1385   else
1386     g_free (button_data);
1387 }
1388
1389 static const char *
1390 get_dir_name (ButtonData *button_data)
1391 {
1392   return button_data->dir_name;
1393 }
1394
1395 /* We always want to request the same size for the label, whether
1396  * or not the contents are bold
1397  */
1398 static void
1399 set_label_size_request (GtkWidget  *alignment,
1400                         ButtonData *button_data)
1401 {
1402   const gchar *dir_name = get_dir_name (button_data);
1403   PangoLayout *layout = gtk_widget_create_pango_layout (button_data->label, dir_name);
1404   gint width, height, bold_width, bold_height;
1405   gchar *markup;
1406
1407   pango_layout_get_pixel_size (layout, &width, &height);
1408
1409   markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1410   pango_layout_set_markup (layout, markup, -1);
1411   g_free (markup);
1412
1413   pango_layout_get_pixel_size (layout, &bold_width, &bold_height);
1414
1415   gtk_widget_set_size_request (alignment,
1416                                MAX (width, bold_width),
1417                                MAX (height, bold_height));
1418   g_object_unref (layout);
1419 }
1420
1421 static void
1422 gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
1423                                        ButtonData *button_data,
1424                                        gboolean    current_dir)
1425 {
1426   const gchar *dir_name = get_dir_name (button_data);
1427
1428   if (button_data->label != NULL)
1429     {
1430       if (current_dir)
1431         {
1432           char *markup;
1433
1434           markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
1435           gtk_label_set_markup (GTK_LABEL (button_data->label), markup);
1436           g_free (markup);
1437         }
1438       else
1439         {
1440           gtk_label_set_text (GTK_LABEL (button_data->label), dir_name);
1441         }
1442     }
1443
1444   if (button_data->image != NULL)
1445     {
1446       set_button_image (path_bar, button_data);
1447     }
1448
1449   if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir)
1450     {
1451       button_data->ignore_changes = TRUE;
1452       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir);
1453       button_data->ignore_changes = FALSE;
1454     }
1455 }
1456
1457 static ButtonType
1458 find_button_type (GtkPathBar  *path_bar,
1459                   GFile       *file)
1460 {
1461   if (path_bar->root_file != NULL &&
1462       g_file_equal (file, path_bar->root_file))
1463     return ROOT_BUTTON;
1464   if (path_bar->home_file != NULL &&
1465       g_file_equal (file, path_bar->home_file))
1466     return HOME_BUTTON;
1467   if (path_bar->desktop_file != NULL &&
1468       g_file_equal (file, path_bar->desktop_file))
1469     return DESKTOP_BUTTON;
1470
1471  return NORMAL_BUTTON;
1472 }
1473
1474 static void
1475 button_drag_data_get_cb (GtkWidget          *widget,
1476                          GdkDragContext     *context,
1477                          GtkSelectionData   *selection_data,
1478                          guint               info,
1479                          guint               time_,
1480                          gpointer            data)
1481 {
1482   ButtonData *button_data;
1483   GtkPathBar *path_bar;
1484   char *uris[2];
1485
1486   button_data = data;
1487   path_bar = GTK_PATH_BAR (gtk_widget_get_parent (widget)); /* the button's parent *is* the path bar */
1488
1489   uris[0] = g_file_get_uri (button_data->file);
1490   uris[1] = NULL;
1491
1492   gtk_selection_data_set_uris (selection_data, uris);
1493   g_free (uris[0]);
1494 }
1495
1496 static ButtonData *
1497 make_directory_button (GtkPathBar  *path_bar,
1498                        const char  *dir_name,
1499                        GFile       *file,
1500                        gboolean     current_dir,
1501                        gboolean     file_is_hidden)
1502 {
1503   AtkObject *atk_obj;
1504   GtkWidget *child = NULL;
1505   GtkWidget *label_alignment = NULL;
1506   ButtonData *button_data;
1507
1508   file_is_hidden = !! file_is_hidden;
1509   /* Is it a special button? */
1510   button_data = g_new0 (ButtonData, 1);
1511
1512   button_data->type = find_button_type (path_bar, file);
1513   button_data->button = gtk_toggle_button_new ();
1514   atk_obj = gtk_widget_get_accessible (button_data->button);
1515   gtk_button_set_focus_on_click (GTK_BUTTON (button_data->button), FALSE);
1516
1517   switch (button_data->type)
1518     {
1519     case ROOT_BUTTON:
1520       button_data->image = gtk_image_new ();
1521       child = button_data->image;
1522       button_data->label = NULL;
1523       atk_object_set_name (atk_obj, _("File System Root"));
1524       break;
1525     case HOME_BUTTON:
1526     case DESKTOP_BUTTON:
1527       button_data->image = gtk_image_new ();
1528       button_data->label = gtk_label_new (NULL);
1529       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1530       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1531       child = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, FALSE, 2);
1532       gtk_box_pack_start (GTK_BOX (child), button_data->image, FALSE, FALSE, 0);
1533       gtk_box_pack_start (GTK_BOX (child), label_alignment, FALSE, FALSE, 0);
1534       break;
1535     case NORMAL_BUTTON:
1536     default:
1537       button_data->label = gtk_label_new (NULL);
1538       gtk_label_set_ellipsize (GTK_LABEL (button_data->label), PANGO_ELLIPSIZE_END);
1539       label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
1540       gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label);
1541       child = label_alignment;
1542       button_data->image = NULL;
1543     }
1544
1545   button_data->dir_name = g_strdup (dir_name);
1546   button_data->file = g_object_ref (file);
1547   button_data->file_is_hidden = file_is_hidden;
1548
1549   /* FIXME: Maybe we dont need this alignment at all and we can
1550    * use GtkMisc aligments or even GtkWidget:halign/valign center.
1551    *
1552    * The following function ensures that the alignment will always
1553    * request the same size whether the button's text is bold or not.
1554    */
1555   if (label_alignment)
1556     set_label_size_request (label_alignment, button_data);
1557
1558   gtk_container_add (GTK_CONTAINER (button_data->button), child);
1559   gtk_widget_show_all (button_data->button);
1560
1561   gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
1562
1563   g_signal_connect (button_data->button, "clicked",
1564                     G_CALLBACK (button_clicked_cb),
1565                     button_data);
1566   g_object_weak_ref (G_OBJECT (button_data->button),
1567                      (GWeakNotify) button_data_free, button_data);
1568
1569   gtk_drag_source_set (button_data->button,
1570                        GDK_BUTTON1_MASK,
1571                        NULL, 0,
1572                        GDK_ACTION_COPY);
1573   gtk_drag_source_add_uri_targets (button_data->button);
1574   g_signal_connect (button_data->button, "drag-data-get",
1575                     G_CALLBACK (button_drag_data_get_cb), button_data);
1576
1577   return button_data;
1578 }
1579
1580 static gboolean
1581 gtk_path_bar_check_parent_path (GtkPathBar         *path_bar,
1582                                 GFile              *file,
1583                                 GtkFileSystem      *file_system)
1584 {
1585   GList *list;
1586   GList *current_path = NULL;
1587   gboolean need_new_fake_root = FALSE;
1588
1589   for (list = path_bar->button_list; list; list = list->next)
1590     {
1591       ButtonData *button_data;
1592
1593       button_data = list->data;
1594       if (g_file_equal (file, button_data->file))
1595         {
1596           current_path = list;
1597           break;
1598         }
1599       if (list == path_bar->fake_root)
1600         need_new_fake_root = TRUE;
1601     }
1602
1603   if (current_path)
1604     {
1605       if (need_new_fake_root)
1606         {
1607           path_bar->fake_root = NULL;
1608           for (list = current_path; list; list = list->next)
1609             {
1610               ButtonData *button_data;
1611
1612               button_data = list->data;
1613               if (BUTTON_IS_FAKE_ROOT (button_data))
1614                 {
1615                   path_bar->fake_root = list;
1616                   break;
1617                 }
1618             }
1619         }
1620
1621       for (list = path_bar->button_list; list; list = list->next)
1622         {
1623           gtk_path_bar_update_button_appearance (path_bar,
1624                                                  BUTTON_DATA (list->data),
1625                                                  (list == current_path) ? TRUE : FALSE);
1626         }
1627
1628       if (!gtk_widget_get_child_visible (BUTTON_DATA (current_path->data)->button))
1629         {
1630           path_bar->first_scrolled_button = current_path;
1631           gtk_widget_queue_resize (GTK_WIDGET (path_bar));
1632         }
1633
1634       return TRUE;
1635     }
1636   return FALSE;
1637 }
1638
1639
1640 struct SetFileInfo
1641 {
1642   GFile *file;
1643   GFile *parent_file;
1644   GtkPathBar *path_bar;
1645   GList *new_buttons;
1646   GList *fake_root;
1647   gboolean first_directory;
1648 };
1649
1650 static void
1651 gtk_path_bar_set_file_finish (struct SetFileInfo *info,
1652                               gboolean            result)
1653 {
1654   if (result)
1655     {
1656       GList *l;
1657
1658       gtk_path_bar_clear_buttons (info->path_bar);
1659       info->path_bar->button_list = g_list_reverse (info->new_buttons);
1660       info->path_bar->fake_root = info->fake_root;
1661
1662       for (l = info->path_bar->button_list; l; l = l->next)
1663         {
1664           GtkWidget *button = BUTTON_DATA (l->data)->button;
1665           gtk_container_add (GTK_CONTAINER (info->path_bar), button);
1666         }
1667     }
1668   else
1669     {
1670       GList *l;
1671
1672       for (l = info->new_buttons; l; l = l->next)
1673         {
1674           ButtonData *button_data;
1675
1676           button_data = BUTTON_DATA (l->data);
1677           gtk_widget_destroy (button_data->button);
1678         }
1679
1680       g_list_free (info->new_buttons);
1681     }
1682
1683   if (info->file)
1684     g_object_unref (info->file);
1685   if (info->parent_file)
1686     g_object_unref (info->parent_file);
1687   g_free (info);
1688 }
1689
1690 static void
1691 gtk_path_bar_get_info_callback (GCancellable *cancellable,
1692                                 GFileInfo    *info,
1693                                 const GError *error,
1694                                 gpointer      data)
1695 {
1696   gboolean cancelled = g_cancellable_is_cancelled (cancellable);
1697   struct SetFileInfo *file_info = data;
1698   ButtonData *button_data;
1699   const gchar *display_name;
1700   gboolean is_hidden;
1701
1702   if (cancellable != file_info->path_bar->get_info_cancellable)
1703     {
1704       gtk_path_bar_set_file_finish (file_info, FALSE);
1705       g_object_unref (cancellable);
1706       return;
1707     }
1708
1709   g_object_unref (cancellable);
1710   file_info->path_bar->get_info_cancellable = NULL;
1711
1712   if (cancelled || !info)
1713     {
1714       gtk_path_bar_set_file_finish (file_info, FALSE);
1715       return;
1716     }
1717
1718   display_name = g_file_info_get_display_name (info);
1719   is_hidden = g_file_info_get_is_hidden (info) || g_file_info_get_is_backup (info);
1720
1721   gtk_widget_push_composite_child ();
1722   button_data = make_directory_button (file_info->path_bar, display_name,
1723                                        file_info->file,
1724                                        file_info->first_directory, is_hidden);
1725   gtk_widget_pop_composite_child ();
1726   g_object_unref (file_info->file);
1727
1728   file_info->new_buttons = g_list_prepend (file_info->new_buttons, button_data);
1729
1730   if (BUTTON_IS_FAKE_ROOT (button_data))
1731     file_info->fake_root = file_info->new_buttons;
1732
1733   file_info->file = file_info->parent_file;
1734   file_info->first_directory = FALSE;
1735
1736   if (!file_info->file)
1737     {
1738       gtk_path_bar_set_file_finish (file_info, TRUE);
1739       return;
1740     }
1741
1742   file_info->parent_file = g_file_get_parent (file_info->file);
1743
1744   file_info->path_bar->get_info_cancellable =
1745     _gtk_file_system_get_info (file_info->path_bar->file_system,
1746                                file_info->file,
1747                                "standard::display-name,standard::is-hidden,standard::is-backup",
1748                                gtk_path_bar_get_info_callback,
1749                                file_info);
1750 }
1751
1752 gboolean
1753 _gtk_path_bar_set_file (GtkPathBar         *path_bar,
1754                         GFile              *file,
1755                         const gboolean      keep_trail,
1756                         GError            **error)
1757 {
1758   struct SetFileInfo *info;
1759   gboolean result;
1760
1761   g_return_val_if_fail (GTK_IS_PATH_BAR (path_bar), FALSE);
1762   g_return_val_if_fail (G_IS_FILE (file), FALSE);
1763
1764   result = TRUE;
1765
1766   /* Check whether the new path is already present in the pathbar as buttons.
1767    * This could be a parent directory or a previous selected subdirectory.
1768    */
1769   if (keep_trail &&
1770       gtk_path_bar_check_parent_path (path_bar, file, path_bar->file_system))
1771     return TRUE;
1772
1773   info = g_new0 (struct SetFileInfo, 1);
1774   info->file = g_object_ref (file);
1775   info->path_bar = path_bar;
1776   info->first_directory = TRUE;
1777   info->parent_file = g_file_get_parent (info->file);
1778
1779   if (path_bar->get_info_cancellable)
1780     g_cancellable_cancel (path_bar->get_info_cancellable);
1781
1782   path_bar->get_info_cancellable =
1783     _gtk_file_system_get_info (path_bar->file_system,
1784                                info->file,
1785                                "standard::display-name,standard::is-hidden,standard::is-backup",
1786                                gtk_path_bar_get_info_callback,
1787                                info);
1788
1789   return TRUE;
1790 }
1791
1792 /* FIXME: This should be a construct-only property */
1793 void
1794 _gtk_path_bar_set_file_system (GtkPathBar    *path_bar,
1795                                GtkFileSystem *file_system)
1796 {
1797   const char *home;
1798
1799   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1800
1801   g_assert (path_bar->file_system == NULL);
1802
1803   path_bar->file_system = g_object_ref (file_system);
1804
1805   home = g_get_home_dir ();
1806   if (home != NULL)
1807     {
1808       const gchar *desktop;
1809
1810       path_bar->home_file = g_file_new_for_path (home);
1811       /* FIXME: Need file system backend specific way of getting the
1812        * Desktop path.
1813        */
1814       desktop = g_get_user_special_dir (G_USER_DIRECTORY_DESKTOP);
1815       if (desktop != NULL)
1816         path_bar->desktop_file = g_file_new_for_path (desktop);
1817       else
1818         path_bar->desktop_file = NULL;
1819     }
1820   else
1821     {
1822       path_bar->home_file = NULL;
1823       path_bar->desktop_file = NULL;
1824     }
1825   path_bar->root_file = g_file_new_for_path ("/");
1826 }
1827
1828 /**
1829  * _gtk_path_bar_up:
1830  * @path_bar: a #GtkPathBar
1831  *
1832  * If the selected button in the pathbar is not the furthest button "up" (in the
1833  * root direction), act as if the user clicked on the next button up.
1834  **/
1835 void
1836 _gtk_path_bar_up (GtkPathBar *path_bar)
1837 {
1838   GList *l;
1839
1840   for (l = path_bar->button_list; l; l = l->next)
1841     {
1842       GtkWidget *button = BUTTON_DATA (l->data)->button;
1843       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1844         {
1845           if (l->next)
1846             {
1847               GtkWidget *next_button = BUTTON_DATA (l->next->data)->button;
1848               button_clicked_cb (next_button, l->next->data);
1849             }
1850           break;
1851         }
1852     }
1853 }
1854
1855 /**
1856  * _gtk_path_bar_down:
1857  * @path_bar: a #GtkPathBar
1858  *
1859  * If the selected button in the pathbar is not the furthest button "down" (in the
1860  * leaf direction), act as if the user clicked on the next button down.
1861  **/
1862 void
1863 _gtk_path_bar_down (GtkPathBar *path_bar)
1864 {
1865   GList *l;
1866
1867   for (l = path_bar->button_list; l; l = l->next)
1868     {
1869       GtkWidget *button = BUTTON_DATA (l->data)->button;
1870       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1871         {
1872           if (l->prev)
1873             {
1874               GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button;
1875               button_clicked_cb (prev_button, l->prev->data);
1876             }
1877           break;
1878         }
1879     }
1880 }