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

   1 /* gtkpathbar.h
   2  * Copyright (C) 2004  Red Hat, Inc.,  Jonathan Blandford <jrb@gnome.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <config.h>
  21 #include <string.h>
  22 #include "gtkpathbar.h"
  23 #include "gtktogglebutton.h"
  24 #include "gtkarrow.h"
  25 #include "gtkimage.h"
  26 #include "gtkintl.h"
  27 #include "gtkicontheme.h"
  28 #include "gtkiconfactory.h"
  29 #include "gtklabel.h"
  30 #include "gtkhbox.h"
  31 #include "gtkmain.h"
  32 #include "gtkmarshalers.h"
  33
  34 enum {
  35   PATH_CLICKED,
  36   LAST_SIGNAL
  37 };
  38
  39 typedef enum {
  40   NORMAL_BUTTON,
  41   ROOT_BUTTON,
  42   HOME_BUTTON,
  43   DESKTOP_BUTTON
  44 } ButtonType;
  45
  46 #define BUTTON_DATA(x) ((ButtonData *)(x))
  47
  48 static guint path_bar_signals [LAST_SIGNAL] = { 0 };
  49
  50 /* Icon size for if we can't get it from the theme */
  51 #define FALLBACK_ICON_SIZE 20
  52
  53 typedef struct _ButtonData ButtonData;
  54
  55 struct _ButtonData
  56 {
  57   GtkWidget *button;
  58   ButtonType type;
  59   char *dir_name;
  60   GtkFilePath *path;
  61   GtkWidget *image;
  62   GtkWidget *label;
  63   gboolean ignore_changes;
  64 };
  65
  66 G_DEFINE_TYPE (GtkPathBar,
  67                gtk_path_bar,
  68                GTK_TYPE_CONTAINER);
  69
  70 static void gtk_path_bar_finalize                 (GObject          *object);
  71 static void gtk_path_bar_dispose                  (GObject          *object);
  72 static void gtk_path_bar_size_request             (GtkWidget        *widget,
  73                                                    GtkRequisition   *requisition);
  74 static void gtk_path_bar_size_allocate            (GtkWidget        *widget,
  75                                                    GtkAllocation    *allocation);
  76 static void gtk_path_bar_add                      (GtkContainer     *container,
  77                                                    GtkWidget        *widget);
  78 static void gtk_path_bar_remove                   (GtkContainer     *container,
  79                                                    GtkWidget        *widget);
  80 static void gtk_path_bar_forall                   (GtkContainer     *container,
  81                                                    gboolean          include_internals,
  82                                                    GtkCallback       callback,
  83                                                    gpointer          callback_data);
  84 static void gtk_path_bar_scroll_up                (GtkWidget        *button,
  85                                                    GtkPathBar       *path_bar);
  86 static void gtk_path_bar_scroll_down              (GtkWidget        *button,
  87                                                    GtkPathBar       *path_bar);
  88 static void gtk_path_bar_style_set                (GtkWidget        *widget,
  89                                                    GtkStyle         *previous_style);
  90 static void gtk_path_bar_screen_changed           (GtkWidget        *widget,
  91                                                    GdkScreen        *previous_screen);
  92 static void gtk_path_bar_check_icon_theme         (GtkPathBar       *path_bar);
  93 static void gtk_path_bar_update_button_appearance (GtkPathBar       *path_bar,
  94                                                    ButtonData       *button_data,
  95                                                    gboolean          current_dir);
  96
  97 static GtkWidget *
  98 get_slider_button (GtkPathBar  *path_bar,
  99                    GtkArrowType arrow_type)
 100 {
 101   GtkWidget *button;
 102
 103   gtk_widget_push_composite_child ();
 104
 105   button = gtk_button_new ();
 106   gtk_container_add (GTK_CONTAINER (button), gtk_arrow_new (arrow_type, GTK_SHADOW_OUT));
 107   gtk_container_add (GTK_CONTAINER (path_bar), button);
 108   gtk_widget_show_all (button);
 109
 110   gtk_widget_pop_composite_child ();
 111
 112   return button;
 113 }
 114
 115 static void
 116 gtk_path_bar_init (GtkPathBar *path_bar)
 117 {
 118   GTK_WIDGET_SET_FLAGS (path_bar, GTK_NO_WINDOW);
 119   gtk_widget_set_redraw_on_allocate (GTK_WIDGET (path_bar), FALSE);
 120
 121   path_bar->spacing = 3;
 122   path_bar->up_slider_button = get_slider_button (path_bar, GTK_ARROW_LEFT);
 123   path_bar->down_slider_button = get_slider_button (path_bar, GTK_ARROW_RIGHT);
 124   path_bar->icon_size = FALLBACK_ICON_SIZE;
 125
 126   g_signal_connect (path_bar->up_slider_button, "clicked", G_CALLBACK (gtk_path_bar_scroll_up), path_bar);
 127   g_signal_connect (path_bar->down_slider_button, "clicked", G_CALLBACK (gtk_path_bar_scroll_down), path_bar);
 128 }
 129
 130 static void
 131 gtk_path_bar_class_init (GtkPathBarClass *path_bar_class)
 132 {
 133   GObjectClass *gobject_class;
 134   GtkObjectClass *object_class;
 135   GtkWidgetClass *widget_class;
 136   GtkContainerClass *container_class;
 137
 138   gobject_class = (GObjectClass *) path_bar_class;
 139   object_class = (GtkObjectClass *) path_bar_class;
 140   widget_class = (GtkWidgetClass *) path_bar_class;
 141   container_class = (GtkContainerClass *) path_bar_class;
 142
 143   gobject_class->finalize = gtk_path_bar_finalize;
 144   gobject_class->dispose = gtk_path_bar_dispose;
 145
 146   widget_class->size_request = gtk_path_bar_size_request;
 147   widget_class->size_allocate = gtk_path_bar_size_allocate;
 148   widget_class->style_set = gtk_path_bar_style_set;
 149   widget_class->screen_changed = gtk_path_bar_screen_changed;
 150
 151   container_class->add = gtk_path_bar_add;
 152   container_class->forall = gtk_path_bar_forall;
 153   container_class->remove = gtk_path_bar_remove;
 154   /* FIXME: */
 155   /*  container_class->child_type = gtk_path_bar_child_type;*/
 156
 157   path_bar_signals [PATH_CLICKED] =
 158     g_signal_new ("path_clicked",
 159                   G_OBJECT_CLASS_TYPE (object_class),
 160                   G_SIGNAL_RUN_FIRST,
 161                   G_STRUCT_OFFSET (GtkPathBarClass, path_clicked),
 162                   NULL, NULL,
 163                   _gtk_marshal_VOID__POINTER,
 164                   G_TYPE_NONE, 1,
 165                   G_TYPE_POINTER);
 166 }
 167
 168
 169 static void
 170 gtk_path_bar_finalize (GObject *object)
 171 {
 172   GtkPathBar *path_bar;
 173
 174   path_bar = GTK_PATH_BAR (object);
 175   g_list_free (path_bar->button_list);
 176   if (path_bar->root_path)
 177     gtk_file_path_free (path_bar->root_path);
 178   if (path_bar->home_path)
 179     gtk_file_path_free (path_bar->home_path);
 180   if (path_bar->desktop_path)
 181     gtk_file_path_free (path_bar->desktop_path);
 182
 183   if (path_bar->root_icon)
 184     g_object_unref (path_bar->root_icon);
 185   if (path_bar->home_icon)
 186     g_object_unref (path_bar->home_icon);
 187   if (path_bar->desktop_icon)
 188     g_object_unref (path_bar->desktop_icon);
 189
 190   if (path_bar->file_system)
 191     g_object_unref (path_bar->file_system);
 192
 193   G_OBJECT_CLASS (gtk_path_bar_parent_class)->finalize (object);
 194 }
 195
 196 /* Removes the settings signal handler.  It's safe to call multiple times */
 197 static void
 198 remove_settings_signal (GtkPathBar *path_bar,
 199                         GdkScreen  *screen)
 200 {
 201   if (path_bar->settings_signal_id)
 202     {
 203       GtkSettings *settings;
 204
 205       settings = gtk_settings_get_for_screen (screen);
 206       g_signal_handler_disconnect (settings,
 207                                    path_bar->settings_signal_id);
 208       path_bar->settings_signal_id = 0;
 209     }
 210 }
 211
 212 static void
 213 gtk_path_bar_dispose (GObject *object)
 214 {
 215   remove_settings_signal (GTK_PATH_BAR (object),
 216                           gtk_widget_get_screen (GTK_WIDGET (object)));
 217
 218   G_OBJECT_CLASS (gtk_path_bar_parent_class)->dispose (object);
 219 }
 220
 221 /* Size requisition:
 222  *
 223  * Ideally, our size is determined by another widget, and we are just filling
 224  * available space.
 225  */
 226 static void
 227 gtk_path_bar_size_request (GtkWidget      *widget,
 228                            GtkRequisition *requisition)
 229 {
 230   ButtonData *button_data;
 231   GtkPathBar *path_bar;
 232   GtkRequisition child_requisition;
 233   GList *list;
 234
 235   path_bar = GTK_PATH_BAR (widget);
 236
 237   requisition->width = 0;
 238   requisition->height = 0;
 239
 240   for (list = path_bar->button_list; list; list = list->next)
 241     {
 242       button_data = BUTTON_DATA (list->data);
 243       gtk_widget_size_request (button_data->button, &child_requisition);
 244       requisition->width = MAX (child_requisition.width, requisition->width);
 245       requisition->height = MAX (child_requisition.height, requisition->height);
 246     }
 247
 248   /* Add space for slider, if we have more than one path */
 249   /* Theoretically, the slider could be bigger than the other button.  But we're
 250    * not going to worry about that now.
 251    */
 252   path_bar->slider_width = requisition->height / 2 + 5;
 253   if (path_bar->button_list && path_bar->button_list->next != NULL)
 254     requisition->width += (path_bar->spacing + path_bar->slider_width) * 2;
 255
 256   gtk_widget_size_request (path_bar->up_slider_button, &child_requisition);
 257   gtk_widget_size_request (path_bar->down_slider_button, &child_requisition);
 258
 259   requisition->width += GTK_CONTAINER (widget)->border_width * 2;
 260   requisition->height += GTK_CONTAINER (widget)->border_width * 2;
 261
 262   widget->requisition = *requisition;
 263 }
 264
 265 static void
 266 gtk_path_bar_update_slider_buttons (GtkPathBar *path_bar)
 267 {
 268   if (path_bar->button_list)
 269     {
 270       GtkWidget *button;
 271
 272       button = BUTTON_DATA (path_bar->button_list->data)->button;
 273       if (gtk_widget_get_child_visible (button))
 274         gtk_widget_set_sensitive (path_bar->down_slider_button, FALSE);
 275       else
 276         gtk_widget_set_sensitive (path_bar->down_slider_button, TRUE);
 277
 278       button = BUTTON_DATA (g_list_last (path_bar->button_list)->data)->button;
 279       if (gtk_widget_get_child_visible (button))
 280         gtk_widget_set_sensitive (path_bar->up_slider_button, FALSE);
 281       else
 282         gtk_widget_set_sensitive (path_bar->up_slider_button, TRUE);
 283     }
 284 }
 285
 286 /* This is a tad complicated
 287  */
 288 static void
 289 gtk_path_bar_size_allocate (GtkWidget     *widget,
 290                             GtkAllocation *allocation)
 291 {
 292   GtkWidget *child;
 293   GtkPathBar *path_bar = GTK_PATH_BAR (widget);
 294   GtkTextDirection direction;
 295   GtkAllocation child_allocation;
 296   GList *list, *first_button;
 297   gint width;
 298   gint allocation_width;
 299   gint border_width;
 300   gboolean need_sliders = FALSE;
 301   gint up_slider_offset = 0;
 302   gint down_slider_offset = 0;
 303
 304   widget->allocation = *allocation;
 305
 306   /* No path is set; we don't have to allocate anything. */
 307   if (path_bar->button_list == NULL)
 308     return;
 309
 310   direction = gtk_widget_get_direction (widget);
 311   border_width = (gint) GTK_CONTAINER (path_bar)->border_width;
 312   allocation_width = allocation->width - 2 * border_width;
 313
 314   /* First, we check to see if we need the scrollbars. */
 315   width = BUTTON_DATA (path_bar->button_list->data)->button->requisition.width;
 316   for (list = path_bar->button_list->next; list; list = list->next)
 317     {
 318       child = BUTTON_DATA (list->data)->button;
 319
 320       width += child->requisition.width + path_bar->spacing;
 321     }
 322
 323   if (width <= allocation_width)
 324     {
 325       first_button = g_list_last (path_bar->button_list);
 326     }
 327   else
 328     {
 329       gboolean reached_end = FALSE;
 330       gint slider_space = 2 * (path_bar->spacing + path_bar->slider_width);
 331
 332       if (path_bar->first_scrolled_button)
 333         first_button = path_bar->first_scrolled_button;
 334       else
 335         first_button = path_bar->button_list;
 336       need_sliders = TRUE;
 337
 338       /* To see how much space we have, and how many buttons we can display.
 339        * We start at the first button, count forward until hit the new
 340        * button, then count backwards.
 341        */
 342       /* Count down the path chain towards the end. */
 343       width = BUTTON_DATA (first_button->data)->button->requisition.width;
 344       list = first_button->prev;
 345       while (list && !reached_end)
 346         {
 347           child = BUTTON_DATA (list->data)->button;
 348
 349           if (width + child->requisition.width +
 350               path_bar->spacing + slider_space > allocation_width)
 351             reached_end = TRUE;
 352           else
 353             width += child->requisition.width + path_bar->spacing;
 354
 355           list = list->prev;
 356         }
 357
 358       /* Finally, we walk up, seeing how many of the previous buttons we can
 359        * add */
 360       while (first_button->next && ! reached_end)
 361         {
 362           child = BUTTON_DATA (first_button->next->data)->button;
 363
 364           if (width + child->requisition.width + path_bar->spacing + slider_space > allocation_width)
 365             {
 366               reached_end = TRUE;
 367             }
 368           else
 369             {
 370               width += child->requisition.width + path_bar->spacing;
 371               first_button = first_button->next;
 372             }
 373         }
 374     }
 375
 376   /* Now, we allocate space to the buttons */
 377   child_allocation.y = allocation->y + border_width;
 378   child_allocation.height = MAX (1, (gint) allocation->height - border_width * 2);
 379
 380   if (direction == GTK_TEXT_DIR_RTL)
 381     {
 382       child_allocation.x = allocation->x + allocation->width - border_width;
 383       if (need_sliders)
 384         {
 385           child_allocation.x -= (path_bar->spacing + path_bar->slider_width);
 386           up_slider_offset = allocation->width - border_width - path_bar->slider_width;
 387         }
 388     }
 389   else
 390     {
 391       child_allocation.x = allocation->x + border_width;
 392       if (need_sliders)
 393         {
 394           up_slider_offset = border_width;
 395           child_allocation.x += (path_bar->spacing + path_bar->slider_width);
 396         }
 397     }
 398
 399   for (list = first_button; list; list = list->prev)
 400     {
 401       child = BUTTON_DATA (list->data)->button;
 402
 403       child_allocation.width = child->requisition.width;
 404       if (direction == GTK_TEXT_DIR_RTL)
 405         child_allocation.x -= child_allocation.width;
 406
 407       /* Check to see if we've don't have any more space to allocate buttons */
 408       if (need_sliders && direction == GTK_TEXT_DIR_RTL)
 409         {
 410           if (child_allocation.x - path_bar->spacing - path_bar->slider_width < widget->allocation.x + border_width)
 411             break;
 412         }
 413       else if (need_sliders && direction == GTK_TEXT_DIR_LTR)
 414         {
 415           if (child_allocation.x + child_allocation.width + path_bar->spacing + path_bar->slider_width >
 416               widget->allocation.x + border_width + allocation_width)
 417             break;
 418         }
 419
 420       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, TRUE);
 421       gtk_widget_size_allocate (child, &child_allocation);
 422
 423       if (direction == GTK_TEXT_DIR_RTL)
 424         {
 425           child_allocation.x -= path_bar->spacing;
 426           down_slider_offset = child_allocation.x - widget->allocation.x - path_bar->slider_width;
 427         }
 428       else
 429         {
 430           child_allocation.x += child_allocation.width + path_bar->spacing;
 431           down_slider_offset = child_allocation.x - widget->allocation.x;
 432         }
 433     }
 434   /* Now we go hide all the widgets that don't fit */
 435   while (list)
 436     {
 437       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 438       list = list->prev;
 439     }
 440   for (list = first_button->next; list; list = list->next)
 441     {
 442       gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE);
 443     }
 444
 445   if (need_sliders)
 446     {
 447       child_allocation.width = path_bar->slider_width;
 448
 449       child_allocation.x = up_slider_offset + allocation->x;
 450       gtk_widget_size_allocate (path_bar->up_slider_button, &child_allocation);
 451
 452       child_allocation.x = down_slider_offset + allocation->x;
 453       gtk_widget_size_allocate (path_bar->down_slider_button, &child_allocation);
 454
 455       gtk_widget_set_child_visible (path_bar->up_slider_button, TRUE);
 456       gtk_widget_set_child_visible (path_bar->down_slider_button, TRUE);
 457       gtk_widget_show_all (path_bar->up_slider_button);
 458       gtk_widget_show_all (path_bar->down_slider_button);
 459       gtk_path_bar_update_slider_buttons (path_bar);
 460     }
 461   else
 462     {
 463       gtk_widget_set_child_visible (path_bar->up_slider_button, FALSE);
 464       gtk_widget_set_child_visible (path_bar->down_slider_button, FALSE);
 465     }
 466 }
 467
 468 static void
 469 gtk_path_bar_style_set (GtkWidget *widget,
 470                         GtkStyle  *previous_style)
 471 {
 472   if (GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_set)
 473     GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_set (widget, previous_style);
 474
 475   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 476 }
 477
 478 static void
 479 gtk_path_bar_screen_changed (GtkWidget *widget,
 480                              GdkScreen *previous_screen)
 481 {
 482   if (GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed)
 483     GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed (widget, previous_screen);
 484
 485   /* We might nave a new settings, so we remove the old one */
 486   if (previous_screen)
 487     remove_settings_signal (GTK_PATH_BAR (widget), previous_screen);
 488
 489   gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget));
 490 }
 491
 492 static void
 493 gtk_path_bar_add (GtkContainer *container,
 494                   GtkWidget    *widget)
 495 {
 496   gtk_widget_set_parent (widget, GTK_WIDGET (container));
 497 }
 498
 499 static void
 500 gtk_path_bar_remove_1 (GtkContainer *container,
 501                        GtkWidget    *widget)
 502 {
 503   gboolean was_visible = GTK_WIDGET_VISIBLE (widget);
 504   gtk_widget_unparent (widget);
 505   if (was_visible)
 506     gtk_widget_queue_resize (GTK_WIDGET (container));
 507 }
 508
 509 static void
 510 gtk_path_bar_remove (GtkContainer *container,
 511                      GtkWidget    *widget)
 512 {
 513   GtkPathBar *path_bar;
 514   GList *children;
 515
 516   path_bar = GTK_PATH_BAR (container);
 517
 518   if (widget == path_bar->up_slider_button)
 519     {
 520       gtk_path_bar_remove_1 (container, widget);
 521       path_bar->up_slider_button = NULL;
 522       return;
 523     }
 524
 525   if (widget == path_bar->down_slider_button)
 526     {
 527       gtk_path_bar_remove_1 (container, widget);
 528       path_bar->down_slider_button = NULL;
 529       return;
 530     }
 531
 532   children = path_bar->button_list;
 533   while (children)
 534     {
 535       if (widget == BUTTON_DATA (children->data)->button)
 536         {
 537           gtk_path_bar_remove_1 (container, widget);
 538           path_bar->button_list = g_list_remove_link (path_bar->button_list, children);
 539           g_list_free (children);
 540           return;
 541         }
 542
 543       children = children->next;
 544     }
 545 }
 546
 547 static void
 548 gtk_path_bar_forall (GtkContainer *container,
 549                      gboolean      include_internals,
 550                      GtkCallback   callback,
 551                      gpointer      callback_data)
 552 {
 553   GtkPathBar *path_bar;
 554   GList *children;
 555
 556   g_return_if_fail (callback != NULL);
 557   path_bar = GTK_PATH_BAR (container);
 558
 559   children = path_bar->button_list;
 560   while (children)
 561     {
 562       GtkWidget *child;
 563       child = BUTTON_DATA (children->data)->button;
 564       children = children->next;
 565
 566       (* callback) (child, callback_data);
 567     }
 568
 569   if (path_bar->up_slider_button)
 570     (* callback) (path_bar->up_slider_button, callback_data);
 571
 572   if (path_bar->down_slider_button)
 573     (* callback) (path_bar->down_slider_button, callback_data);
 574 }
 575
 576 static void
 577 gtk_path_bar_scroll_down (GtkWidget *button, GtkPathBar *path_bar)
 578 {
 579   GList *list;
 580   GList *down_button = NULL;
 581   GList *up_button = NULL;
 582   gint space_available;
 583   gint space_needed;
 584   gint border_width;
 585   GtkTextDirection direction;
 586
 587   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 588
 589   border_width = GTK_CONTAINER (path_bar)->border_width;
 590   direction = gtk_widget_get_direction (GTK_WIDGET (path_bar));
 591
 592   /* We find the button at the 'down' end that we have to make
 593    * visible */
 594   for (list = path_bar->button_list; list; list = list->next)
 595     {
 596       if (list->next && gtk_widget_get_child_visible (BUTTON_DATA (list->next->data)->button))
 597         {
 598           down_button = list;
 599           break;
 600         }
 601     }
 602
 603   /* Find the last visible button on the 'up' end
 604    */
 605   for (list = g_list_last (path_bar->button_list); list; list = list->prev)
 606     {
 607       if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button))
 608         {
 609           up_button = list;
 610           break;
 611         }
 612     }
 613
 614   space_needed = BUTTON_DATA (down_button->data)->button->allocation.width + path_bar->spacing;
 615   if (direction == GTK_TEXT_DIR_RTL)
 616     space_available = path_bar->down_slider_button->allocation.x - GTK_WIDGET (path_bar)->allocation.x;
 617   else
 618     space_available = (GTK_WIDGET (path_bar)->allocation.x + GTK_WIDGET (path_bar)->allocation.width - border_width) -
 619       (path_bar->down_slider_button->allocation.x + path_bar->down_slider_button->allocation.width);
 620
 621   /* We have space_available extra space that's not being used.  We
 622    * need space_needed space to make the button fit.  So we walk down
 623    * from the end, removing buttons until we get all the space we
 624    * need. */
 625   while (space_available < space_needed)
 626     {
 627       space_available += BUTTON_DATA (up_button->data)->button->allocation.width + path_bar->spacing;
 628       up_button = up_button->prev;
 629       path_bar->first_scrolled_button = up_button;
 630     }
 631 }
 632
 633 static void
 634 gtk_path_bar_scroll_up (GtkWidget *button, GtkPathBar *path_bar)
 635 {
 636   GList *list;
 637
 638   gtk_widget_queue_resize (GTK_WIDGET (path_bar));
 639
 640   for (list = g_list_last (path_bar->button_list); list; list = list->prev)
 641     {
 642       if (list->prev && gtk_widget_get_child_visible (BUTTON_DATA (list->prev->data)->button))
 643         {
 644           path_bar->first_scrolled_button = list;
 645           return;
 646         }
 647     }
 648 }
 649
 650 /* Changes the icons wherever it is needed */
 651 static void
 652 reload_icons (GtkPathBar *path_bar)
 653 {
 654   GList *list;
 655
 656   if (path_bar->root_icon)
 657     {
 658       g_object_unref (path_bar->root_icon);
 659       path_bar->root_icon = NULL;
 660     }
 661   if (path_bar->home_icon)
 662     {
 663       g_object_unref (path_bar->home_icon);
 664       path_bar->home_icon = NULL;
 665     }
 666   if (path_bar->desktop_icon)
 667     {
 668       g_object_unref (path_bar->desktop_icon);
 669       path_bar->desktop_icon = NULL;
 670     }
 671
 672   for (list = path_bar->button_list; list; list = list->next)
 673     {
 674       ButtonData *button_data;
 675       gboolean current_dir;
 676
 677       button_data = BUTTON_DATA (list->data);
 678       if (button_data->type != NORMAL_BUTTON)
 679         {
 680           current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button));
 681           gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
 682         }
 683     }
 684
 685 }
 686
 687 static void
 688 change_icon_theme (GtkPathBar *path_bar)
 689 {
 690   GtkSettings *settings;
 691   gint width, height;
 692
 693   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
 694
 695   if (gtk_icon_size_lookup_for_settings (settings, GTK_ICON_SIZE_BUTTON, &width, &height))
 696     path_bar->icon_size = MAX (width, height);
 697   else
 698     path_bar->icon_size = FALLBACK_ICON_SIZE;
 699
 700   reload_icons (path_bar);
 701 }
 702 /* Callback used when a GtkSettings value changes */
 703 static void
 704 settings_notify_cb (GObject    *object,
 705                     GParamSpec *pspec,
 706                     GtkPathBar *path_bar)
 707 {
 708   const char *name;
 709
 710   name = g_param_spec_get_name (pspec);
 711
 712   if (! strcmp (name, "gtk-icon-theme-name") ||
 713       ! strcmp (name, "gtk-icon-sizes"))
 714     change_icon_theme (path_bar);
 715 }
 716
 717 static void
 718 gtk_path_bar_check_icon_theme (GtkPathBar *path_bar)
 719 {
 720   GtkSettings *settings;
 721
 722   if (path_bar->settings_signal_id)
 723     return;
 724
 725   settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar)));
 726   path_bar->settings_signal_id = g_signal_connect (settings, "notify", G_CALLBACK (settings_notify_cb), path_bar);
 727
 728   change_icon_theme (path_bar);
 729 }
 730
 731 /* Public functions and their helpers */
 732 static void
 733 gtk_path_bar_clear_buttons (GtkPathBar *path_bar)
 734 {
 735   while (path_bar->button_list != NULL)
 736     {
 737       gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (path_bar->button_list->data)->button);
 738     }
 739   path_bar->first_scrolled_button = NULL;
 740 }
 741
 742 static void
 743 button_clicked_cb (GtkWidget *button,
 744                    gpointer   data)
 745 {
 746   ButtonData *button_data;
 747   GtkWidget *path_bar;
 748
 749   button_data = BUTTON_DATA (data);
 750   if (button_data->ignore_changes)
 751     return;
 752
 753   path_bar = button->parent;
 754   g_assert (GTK_IS_PATH_BAR (path_bar));
 755   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
 756
 757   g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0, button_data->path);
 758 }
 759
 760 static GdkPixbuf *
 761 get_button_image (GtkPathBar *path_bar,
 762                   ButtonType  button_type)
 763 {
 764   GtkFileSystemVolume *volume;
 765
 766   switch (button_type)
 767     {
 768     case ROOT_BUTTON:
 769
 770       if (path_bar->root_icon != NULL)
 771         return path_bar->root_icon;
 772
 773       volume = gtk_file_system_get_volume_for_path (path_bar->file_system, path_bar->root_path);
 774       if (volume == NULL)
 775         return NULL;
 776
 777       path_bar->root_icon = gtk_file_system_volume_render_icon (path_bar->file_system,
 778                                                                 volume,
 779                                                                 GTK_WIDGET (path_bar),
 780                                                                 path_bar->icon_size,
 781                                                                 NULL);
 782       gtk_file_system_volume_free (path_bar->file_system, volume);
 783
 784       return path_bar->root_icon;
 785     case HOME_BUTTON:
 786       if (path_bar->home_icon != NULL)
 787         return path_bar->home_icon;
 788
 789       path_bar->home_icon = gtk_file_system_render_icon (path_bar->file_system,
 790                                                          path_bar->home_path,
 791                                                          GTK_WIDGET (path_bar),
 792                                                          path_bar->icon_size,
 793                                                          NULL);
 794       return path_bar->home_icon;
 795     case DESKTOP_BUTTON:
 796       if (path_bar->desktop_icon != NULL)
 797         return path_bar->desktop_icon;
 798
 799       path_bar->desktop_icon = gtk_file_system_render_icon (path_bar->file_system,
 800                                                             path_bar->desktop_path,
 801                                                             GTK_WIDGET (path_bar),
 802                                                             path_bar->icon_size,
 803                                                             NULL);
 804       return path_bar->desktop_icon;
 805     default:
 806       return NULL;
 807     }
 808
 809   return NULL;
 810 }
 811
 812 static void
 813 button_data_free (ButtonData *button_data)
 814 {
 815   gtk_file_path_free (button_data->path);
 816   g_free (button_data->dir_name);
 817   g_free (button_data);
 818 }
 819
 820 static void
 821 gtk_path_bar_update_button_appearance (GtkPathBar *path_bar,
 822                                        ButtonData *button_data,
 823                                        gboolean    current_dir)
 824 {
 825   const gchar *dir_name;
 826
 827   if (button_data->type == HOME_BUTTON)
 828     dir_name = _("Home");
 829   else if (button_data->type == DESKTOP_BUTTON)
 830     dir_name = _("Desktop");
 831   else
 832     dir_name = button_data->dir_name;
 833
 834   if (button_data->label != NULL)
 835     {
 836       if (current_dir)
 837         {
 838           char *markup;
 839
 840           markup = g_markup_printf_escaped ("<b>%s</b>", dir_name);
 841           gtk_label_set_markup (GTK_LABEL (button_data->label), markup);
 842           g_free (markup);
 843         }
 844       else
 845         {
 846           gtk_label_set_text (GTK_LABEL (button_data->label), dir_name);
 847         }
 848     }
 849
 850   if (button_data->image != NULL)
 851     {
 852       GdkPixbuf *pixbuf;
 853       pixbuf = get_button_image (path_bar, button_data->type);
 854       gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), pixbuf);
 855     }
 856
 857   if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir)
 858     {
 859       button_data->ignore_changes = TRUE;
 860       gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir);
 861       button_data->ignore_changes = FALSE;
 862     }
 863 }
 864
 865 static ButtonType
 866 find_button_type (GtkPathBar  *path_bar,
 867                   GtkFilePath *path)
 868 {
 869   if (! gtk_file_path_compare (path, path_bar->root_path))
 870     return ROOT_BUTTON;
 871   if (! gtk_file_path_compare (path, path_bar->home_path))
 872     return HOME_BUTTON;
 873   if (! gtk_file_path_compare (path, path_bar->desktop_path))
 874     return DESKTOP_BUTTON;
 875
 876  return NORMAL_BUTTON;
 877 }
 878
 879 static ButtonData *
 880 make_directory_button (GtkPathBar  *path_bar,
 881                        const char  *dir_name,
 882                        GtkFilePath *path,
 883                        gboolean     current_dir)
 884 {
 885   GtkWidget *child = NULL;
 886   ButtonData *button_data;
 887
 888   /* Is it a special button? */
 889   button_data = g_new0 (ButtonData, 1);
 890
 891   button_data->type = find_button_type (path_bar, path);
 892   button_data->button = gtk_toggle_button_new ();
 893
 894   switch (button_data->type)
 895     {
 896     case ROOT_BUTTON:
 897       button_data->image = gtk_image_new ();
 898       child = button_data->image;
 899       button_data->label = NULL;
 900       break;
 901     case HOME_BUTTON:
 902     case DESKTOP_BUTTON:
 903       button_data->image = gtk_image_new ();
 904       button_data->label = gtk_label_new (NULL);
 905       child = gtk_hbox_new (FALSE, 2);
 906       gtk_box_pack_start (GTK_BOX (child), button_data->image, FALSE, FALSE, 0);
 907       gtk_box_pack_start (GTK_BOX (child), button_data->label, FALSE, FALSE, 0);
 908       break;
 909     case NORMAL_BUTTON:
 910     default:
 911       button_data->label = gtk_label_new (NULL);
 912       child = button_data->label;
 913       button_data->image = NULL;
 914     }
 915
 916   button_data->dir_name = g_strdup (dir_name);
 917   button_data->path = gtk_file_path_new_dup (gtk_file_path_get_string (path));
 918
 919   gtk_container_add (GTK_CONTAINER (button_data->button), child);
 920   gtk_widget_show_all (button_data->button);
 921
 922   gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir);
 923
 924   g_signal_connect (button_data->button, "clicked",
 925                     G_CALLBACK (button_clicked_cb),
 926                     button_data);
 927   g_object_weak_ref (G_OBJECT (button_data->button),
 928                      (GWeakNotify) button_data_free, button_data);
 929
 930   return button_data;
 931 }
 932
 933 static gboolean
 934 gtk_path_bar_check_parent_path (GtkPathBar         *path_bar,
 935                                 const GtkFilePath  *file_path,
 936                                 GtkFileSystem      *file_system)
 937 {
 938   GList *list;
 939   GList *current_path = NULL;
 940
 941   for (list = path_bar->button_list; list; list = list->next)
 942     {
 943       ButtonData *button_data;
 944
 945       button_data = list->data;
 946       if (! gtk_file_path_compare (file_path, button_data->path))
 947         {
 948           current_path = list;
 949           break;
 950         }
 951     }
 952
 953   if (current_path)
 954     {
 955       for (list = path_bar->button_list; list; list = list->next)
 956         {
 957           gtk_path_bar_update_button_appearance (path_bar,
 958                                                  BUTTON_DATA (list->data),
 959                                                  (list == current_path) ? TRUE : FALSE);
 960         }
 961       return TRUE;
 962     }
 963   return FALSE;
 964 }
 965
 966 gboolean
 967 _gtk_path_bar_set_path (GtkPathBar         *path_bar,
 968                         const GtkFilePath  *file_path,
 969                         GError            **error)
 970 {
 971   GtkFilePath *path;
 972   gboolean first_directory = TRUE;
 973   gboolean result;
 974   GList *new_buttons = NULL;
 975
 976   g_return_val_if_fail (GTK_IS_PATH_BAR (path_bar), FALSE);
 977   g_return_val_if_fail (file_path != NULL, FALSE);
 978
 979   result = TRUE;
 980
 981   /* Check whether the new path is already present in the pathbar as buttons.
 982    * This could be a parent directory or a previous selected subdirectory.
 983    */
 984   if (gtk_path_bar_check_parent_path (path_bar, file_path, path_bar->file_system))
 985     return TRUE;
 986
 987   path = gtk_file_path_copy (file_path);
 988
 989   gtk_widget_push_composite_child ();
 990
 991   while (path != NULL)
 992     {
 993       GtkFilePath *parent_path = NULL;
 994       ButtonData *button_data;
 995       const gchar *display_name;
 996       GtkFileFolder *file_folder;
 997       GtkFileInfo *file_info;
 998       gboolean valid;
 999
1000       valid = gtk_file_system_get_parent (path_bar->file_system,
1001                                           path,
1002                                           &parent_path,
1003                                           error);
1004       if (!valid)
1005         {
1006           result = FALSE;
1007           gtk_file_path_free (path);
1008           break;
1009         }
1010
1011       file_folder = gtk_file_system_get_folder (path_bar->file_system,
1012                                                 parent_path ? parent_path : path,
1013                                                 GTK_FILE_INFO_DISPLAY_NAME,
1014                                                 NULL);
1015       if (!file_folder)
1016         {
1017           result = FALSE;
1018           gtk_file_path_free (parent_path);
1019           gtk_file_path_free (path);
1020           break;
1021         }
1022
1023       file_info = gtk_file_folder_get_info (file_folder, parent_path ? path : NULL, error);
1024       g_object_unref (file_folder);
1025
1026       if (!file_info)
1027         {
1028           result = FALSE;
1029           gtk_file_path_free (parent_path);
1030           gtk_file_path_free (path);
1031           break;
1032         }
1033
1034       display_name = gtk_file_info_get_display_name (file_info);
1035
1036       button_data = make_directory_button (path_bar, display_name, path, first_directory);
1037       gtk_file_info_free (file_info);
1038       gtk_file_path_free (path);
1039
1040       new_buttons = g_list_prepend (new_buttons, button_data);
1041
1042       if (button_data->type != NORMAL_BUTTON)
1043         {
1044           gtk_file_path_free (parent_path);
1045           break;
1046         }
1047
1048       path = parent_path;
1049       first_directory = FALSE;
1050     }
1051
1052   if (result)
1053     {
1054       GList *l;
1055
1056       gtk_path_bar_clear_buttons (path_bar);
1057       path_bar->button_list = g_list_reverse (new_buttons);
1058
1059       for (l = path_bar->button_list; l; l = l->next)
1060         {
1061           GtkWidget *button = BUTTON_DATA (l->data)->button;
1062           gtk_container_add (GTK_CONTAINER (path_bar), button);
1063         }
1064     }
1065   else
1066     {
1067       GList *l;
1068
1069       for (l = new_buttons; l; l = l->next)
1070         {
1071           GtkWidget *button = BUTTON_DATA (l->data)->button;
1072           gtk_widget_destroy (button);
1073           gtk_widget_unref (button);
1074         }
1075
1076       g_list_free (new_buttons);
1077     }
1078
1079   gtk_widget_pop_composite_child ();
1080
1081   return result;
1082 }
1083
1084
1085 /* FIXME: This should be a construct-only property */
1086 void
1087 _gtk_path_bar_set_file_system (GtkPathBar    *path_bar,
1088                                GtkFileSystem *file_system)
1089 {
1090   const char *home;
1091   char *desktop;
1092
1093   g_return_if_fail (GTK_IS_PATH_BAR (path_bar));
1094
1095   g_assert (path_bar->file_system == NULL);
1096
1097   path_bar->file_system = g_object_ref (file_system);
1098
1099   home = g_get_home_dir ();
1100   desktop = g_build_filename (home, "Desktop", NULL);
1101   path_bar->home_path = gtk_file_system_filename_to_path (path_bar->file_system, home);
1102   path_bar->desktop_path = gtk_file_system_filename_to_path (path_bar->file_system, desktop);
1103   path_bar->root_path = gtk_file_system_filename_to_path (path_bar->file_system, "/");
1104   g_free (desktop);
1105 }
1106
1107 /**
1108  * _gtk_path_bar_up:
1109  * @path_bar: a #GtkPathBar
1110  *
1111  * If the selected button in the pathbar is not the furthest button "up" (in the
1112  * root direction), act as if the user clicked on the next button up.
1113  **/
1114 void
1115 _gtk_path_bar_up (GtkPathBar *path_bar)
1116 {
1117   GList *l;
1118
1119   for (l = path_bar->button_list; l; l = l->next)
1120     {
1121       GtkWidget *button = BUTTON_DATA (l->data)->button;
1122       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1123         {
1124           if (l->next)
1125             {
1126               GtkWidget *next_button = BUTTON_DATA (l->next->data)->button;
1127               button_clicked_cb (next_button, l->next->data);
1128             }
1129           break;
1130         }
1131     }
1132 }
1133
1134 /**
1135  * _gtk_path_bar_down:
1136  * @path_bar: a #GtkPathBar
1137  *
1138  * If the selected button in the pathbar is not the furthest button "down" (in the
1139  * leaf direction), act as if the user clicked on the next button down.
1140  **/
1141 void
1142 _gtk_path_bar_down (GtkPathBar *path_bar)
1143 {
1144   GList *l;
1145
1146   for (l = path_bar->button_list; l; l = l->next)
1147     {
1148       GtkWidget *button = BUTTON_DATA (l->data)->button;
1149       if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
1150         {
1151           if (l->prev)
1152             {
1153               GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button;
1154               button_clicked_cb (prev_button, l->prev->data);
1155             }
1156           break;
1157         }
1158     }
1159 }