libempathy-gtk/ephy-spinner.c

   1 /*
   2  * Copyright © 2000 Eazel, Inc.
   3  * Copyright © 2002-2004 Marco Pesenti Gritti
   4  * Copyright © 2004, 2006 Christian Persch
   5  *
   6  * Nautilus is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Nautilus is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * Author: Andy Hertzfeld <andy@eazel.com>
  21  *
  22  * Ephy port by Marco Pesenti Gritti <marco@it.gnome.org>
  23  *
  24  * $Id: ephy-spinner.c 2114 2006-12-25 12:15:00Z mr $
  25  */
  26
  27 #include "config.h"
  28
  29 #include "ephy-spinner.h"
  30
  31 /* #include "ephy-debug.h" */
  32 #define LOG(msg, args...)
  33 #define START_PROFILER(name)
  34 #define STOP_PROFILER(name)
  35
  36 #include <gdk-pixbuf/gdk-pixbuf.h>
  37 #include <gtk/gtkicontheme.h>
  38 #include <gtk/gtkiconfactory.h>
  39 #include <gtk/gtksettings.h>
  40
  41 /* Spinner cache implementation */
  42
  43 #define EPHY_TYPE_SPINNER_CACHE                 (ephy_spinner_cache_get_type())
  44 #define EPHY_SPINNER_CACHE(object)              (G_TYPE_CHECK_INSTANCE_CAST((object), EPHY_TYPE_SPINNER_CACHE, EphySpinnerCache))
  45 #define EPHY_SPINNER_CACHE_CLASS(klass)         (G_TYPE_CHECK_CLASS_CAST((klass), EPHY_TYPE_SPINNER_CACHE, EphySpinnerCacheClass))
  46 #define EPHY_IS_SPINNER_CACHE(object)           (G_TYPE_CHECK_INSTANCE_TYPE((object), EPHY_TYPE_SPINNER_CACHE))
  47 #define EPHY_IS_SPINNER_CACHE_CLASS(klass)      (G_TYPE_CHECK_CLASS_TYPE((klass), EPHY_TYPE_SPINNER_CACHE))
  48 #define EPHY_SPINNER_CACHE_GET_CLASS(obj)       (G_TYPE_INSTANCE_GET_CLASS((obj), EPHY_TYPE_SPINNER_CACHE, EphySpinnerCacheClass))
  49
  50 typedef struct _EphySpinnerCache        EphySpinnerCache;
  51 typedef struct _EphySpinnerCacheClass   EphySpinnerCacheClass;
  52 typedef struct _EphySpinnerCachePrivate EphySpinnerCachePrivate;
  53
  54 struct _EphySpinnerCacheClass
  55 {
  56         GObjectClass parent_class;
  57 };
  58
  59 struct _EphySpinnerCache
  60 {
  61         GObject parent_object;
  62
  63         /*< private >*/
  64         EphySpinnerCachePrivate *priv;
  65 };
  66
  67 #define EPHY_SPINNER_CACHE_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_SPINNER_CACHE, EphySpinnerCachePrivate))
  68
  69 struct _EphySpinnerCachePrivate
  70 {
  71         /* Hash table of GdkScreen -> EphySpinnerCacheData */
  72         GHashTable *hash;
  73 };
  74
  75 typedef struct
  76 {
  77         guint ref_count;
  78         GtkIconSize size;
  79         int width;
  80         int height;
  81         GdkPixbuf **animation_pixbufs;
  82         guint n_animation_pixbufs;
  83 } EphySpinnerImages;
  84
  85 #define LAST_ICON_SIZE                  GTK_ICON_SIZE_DIALOG + 1
  86 #define SPINNER_ICON_NAME               "process-working"
  87 #define SPINNER_FALLBACK_ICON_NAME      "gnome-spinner"
  88 #define EPHY_SPINNER_IMAGES_INVALID     ((EphySpinnerImages *) 0x1)
  89
  90 typedef struct
  91 {
  92         GdkScreen *screen;
  93         GtkIconTheme *icon_theme;
  94         EphySpinnerImages *images[LAST_ICON_SIZE];
  95 } EphySpinnerCacheData;
  96
  97 static void ephy_spinner_cache_class_init (EphySpinnerCacheClass *klass);
  98 static void ephy_spinner_cache_init       (EphySpinnerCache *cache);
  99
 100 static GObjectClass *ephy_spinner_cache_parent_class;
 101
 102 static GType
 103 ephy_spinner_cache_get_type (void)
 104 {
 105         static GType type = 0;
 106
 107         if (G_UNLIKELY (type == 0))
 108         {
 109                 const GTypeInfo our_info =
 110                 {
 111                         sizeof (EphySpinnerCacheClass),
 112                         NULL,
 113                         NULL,
 114                         (GClassInitFunc) ephy_spinner_cache_class_init,
 115                         NULL,
 116                         NULL,
 117                         sizeof (EphySpinnerCache),
 118                         0,
 119                         (GInstanceInitFunc) ephy_spinner_cache_init
 120                 };
 121
 122                 type = g_type_register_static (G_TYPE_OBJECT,
 123                                                "EphySpinnerCache",
 124                                                &our_info, 0);
 125         }
 126
 127         return type;
 128 }
 129
 130 static EphySpinnerImages *
 131 ephy_spinner_images_ref (EphySpinnerImages *images)
 132 {
 133         g_return_val_if_fail (images != NULL, NULL);
 134
 135         images->ref_count++;
 136
 137         return images;
 138 }
 139
 140 static void
 141 ephy_spinner_images_unref (EphySpinnerImages *images)
 142 {
 143         g_return_if_fail (images != NULL);
 144
 145         images->ref_count--;
 146         if (images->ref_count == 0)
 147         {
 148                 guint i;
 149
 150                 LOG ("Freeing spinner images %p for size %d", images, images->size);
 151
 152                 for (i = 0; i < images->n_animation_pixbufs; ++i)
 153                 {
 154                         g_object_unref (images->animation_pixbufs[i]);
 155                 }
 156                 g_free (images->animation_pixbufs);
 157
 158                 g_free (images);
 159         }
 160 }
 161
 162 static void
 163 ephy_spinner_cache_data_unload (EphySpinnerCacheData *data)
 164 {
 165         GtkIconSize size;
 166         EphySpinnerImages *images;
 167
 168         g_return_if_fail (data != NULL);
 169
 170         LOG ("EphySpinnerDataCache unload for screen %p", data->screen);
 171
 172         for (size = GTK_ICON_SIZE_INVALID; size < LAST_ICON_SIZE; ++size)
 173         {
 174                 images = data->images[size];
 175                 data->images[size] = NULL;
 176
 177                 if (images != NULL && images != EPHY_SPINNER_IMAGES_INVALID)
 178                 {
 179                         ephy_spinner_images_unref (images);
 180                 }
 181         }
 182 }
 183
 184 static GdkPixbuf *
 185 extract_frame (GdkPixbuf *grid_pixbuf,
 186                int x,
 187                int y,
 188                int size)
 189 {
 190         GdkPixbuf *pixbuf;
 191
 192         if (x + size > gdk_pixbuf_get_width (grid_pixbuf) ||
 193             y + size > gdk_pixbuf_get_height (grid_pixbuf))
 194         {
 195                 return NULL;
 196         }
 197
 198         pixbuf = gdk_pixbuf_new_subpixbuf (grid_pixbuf,
 199                                            x, y,
 200                                            size, size);
 201         g_return_val_if_fail (pixbuf != NULL, NULL);
 202
 203         return pixbuf;
 204 }
 205
 206 static GdkPixbuf *
 207 scale_to_size (GdkPixbuf *pixbuf,
 208                int dw,
 209                int dh)
 210 {
 211         GdkPixbuf *result;
 212         int pw, ph;
 213
 214         g_return_val_if_fail (pixbuf != NULL, NULL);
 215
 216         pw = gdk_pixbuf_get_width (pixbuf);
 217         ph = gdk_pixbuf_get_height (pixbuf);
 218
 219         if (pw != dw || ph != dh)
 220         {
 221                 result = gdk_pixbuf_scale_simple (pixbuf, dw, dh,
 222                                                   GDK_INTERP_BILINEAR);
 223                 g_object_unref (pixbuf);
 224                 return result;
 225         }
 226
 227         return pixbuf;
 228 }
 229
 230 static EphySpinnerImages *
 231 ephy_spinner_images_load (GdkScreen *screen,
 232                           GtkIconTheme *icon_theme,
 233                           GtkIconSize icon_size)
 234 {
 235         EphySpinnerImages *images;
 236         GdkPixbuf *icon_pixbuf, *pixbuf;
 237         GtkIconInfo *icon_info = NULL;
 238         int grid_width, grid_height, x, y, requested_size, size, isw, ish, n;
 239         const char *icon;
 240         GSList *list = NULL, *l;
 241
 242         LOG ("EphySpinnerCacheData loading for screen %p at size %d", screen, icon_size);
 243
 244         START_PROFILER ("loading spinner animation")
 245
 246         if (!gtk_icon_size_lookup_for_settings (gtk_settings_get_for_screen (screen),
 247                                                 icon_size, &isw, &ish)) goto loser;
 248
 249         requested_size = MAX (ish, isw);
 250
 251         /* Load the animation. The 'rest icon' is the 0th frame */
 252         icon_info = gtk_icon_theme_lookup_icon (icon_theme,
 253                                                 SPINNER_ICON_NAME,
 254                                                 requested_size, 0);
 255         if (icon_info == NULL)
 256         {
 257                 g_warning ("Throbber animation not found");
 258
 259                 /* If the icon naming spec compliant name wasn't found, try the old name */
 260                 icon_info = gtk_icon_theme_lookup_icon (icon_theme,
 261                                                         SPINNER_FALLBACK_ICON_NAME,
 262                                                         requested_size, 0);
 263                 if (icon_info == NULL)
 264                 {
 265                         g_warning ("Throbber fallback animation not found either");
 266                         goto loser;
 267                 }
 268         }
 269         g_assert (icon_info != NULL);
 270
 271         size = gtk_icon_info_get_base_size (icon_info);
 272         icon = gtk_icon_info_get_filename (icon_info);
 273         if (icon == NULL) goto loser;
 274
 275         icon_pixbuf = gdk_pixbuf_new_from_file (icon, NULL);
 276         gtk_icon_info_free (icon_info);
 277         icon_info = NULL;
 278
 279         if (icon_pixbuf == NULL)
 280         {
 281                 g_warning ("Could not load the spinner file");
 282                 goto loser;
 283         }
 284
 285         grid_width = gdk_pixbuf_get_width (icon_pixbuf);
 286         grid_height = gdk_pixbuf_get_height (icon_pixbuf);
 287
 288         n = 0;
 289         for (y = 0; y < grid_height; y += size)
 290         {
 291                 for (x = 0; x < grid_width ; x += size)
 292                 {
 293                         pixbuf = extract_frame (icon_pixbuf, x, y, size);
 294
 295                         if (pixbuf)
 296                         {
 297                                 list = g_slist_prepend (list, pixbuf);
 298                                 ++n;
 299                         }
 300                         else
 301                         {
 302                                 g_warning ("Cannot extract frame (%d, %d) from the grid\n", x, y);
 303                         }
 304                 }
 305         }
 306
 307         g_object_unref (icon_pixbuf);
 308
 309         if (list == NULL) goto loser;
 310         g_assert (n > 0);
 311
 312         if (size > requested_size)
 313         {
 314                 for (l = list; l != NULL; l = l->next)
 315                 {
 316                         l->data = scale_to_size (l->data, isw, ish);
 317                 }
 318         }
 319
 320         /* Now we've successfully got all the data */
 321         images = g_new (EphySpinnerImages, 1);
 322         images->ref_count = 1;
 323
 324         images->size = icon_size;
 325         images->width = images->height = requested_size;
 326
 327         images->n_animation_pixbufs = n;
 328         images->animation_pixbufs = g_new (GdkPixbuf *, n);
 329
 330         for (l = list; l != NULL; l = l->next)
 331         {
 332                 g_assert (l->data != NULL);
 333                 images->animation_pixbufs[--n] = l->data;
 334         }
 335         g_assert (n == 0);
 336
 337         g_slist_free (list);
 338
 339         STOP_PROFILER ("loading spinner animation")
 340
 341         return images;
 342
 343 loser:
 344         if (icon_info)
 345         {
 346                 gtk_icon_info_free (icon_info);
 347         }
 348         g_slist_foreach (list, (GFunc) g_object_unref, NULL);
 349
 350         STOP_PROFILER ("loading spinner animation")
 351
 352         return NULL;
 353 }
 354
 355 static EphySpinnerCacheData *
 356 ephy_spinner_cache_data_new (GdkScreen *screen)
 357 {
 358         EphySpinnerCacheData *data;
 359
 360         data = g_new0 (EphySpinnerCacheData, 1);
 361
 362         data->screen = screen;
 363         data->icon_theme = gtk_icon_theme_get_for_screen (screen);
 364         g_signal_connect_swapped (data->icon_theme, "changed",
 365                                   G_CALLBACK (ephy_spinner_cache_data_unload),
 366                                   data);
 367
 368         return data;
 369 }
 370
 371 static void
 372 ephy_spinner_cache_data_free (EphySpinnerCacheData *data)
 373 {
 374         g_return_if_fail (data != NULL);
 375         g_return_if_fail (data->icon_theme != NULL);
 376
 377         g_signal_handlers_disconnect_by_func
 378                 (data->icon_theme,
 379                  G_CALLBACK (ephy_spinner_cache_data_unload), data);
 380
 381         ephy_spinner_cache_data_unload (data);
 382
 383         g_free (data);
 384 }
 385
 386 static EphySpinnerImages *
 387 ephy_spinner_cache_get_images (EphySpinnerCache *cache,
 388                                GdkScreen *screen,
 389                                GtkIconSize icon_size)
 390 {
 391         EphySpinnerCachePrivate *priv = cache->priv;
 392         EphySpinnerCacheData *data;
 393         EphySpinnerImages *images;
 394
 395         LOG ("Getting animation images for screen %p at size %d", screen, icon_size);
 396
 397         g_return_val_if_fail (icon_size >= 0 && icon_size < LAST_ICON_SIZE, NULL);
 398
 399         /* Backward compat: "invalid" meant "native" size which doesn't exist anymore */
 400         if (icon_size == GTK_ICON_SIZE_INVALID)
 401         {
 402                 icon_size = GTK_ICON_SIZE_DIALOG;
 403         }
 404
 405         data = g_hash_table_lookup (priv->hash, screen);
 406         if (data == NULL)
 407         {
 408                 data = ephy_spinner_cache_data_new (screen);
 409                 /* FIXME: think about what happens when the screen's display is closed later on */
 410                 g_hash_table_insert (priv->hash, screen, data);
 411         }
 412
 413         images = data->images[icon_size];
 414         if (images == EPHY_SPINNER_IMAGES_INVALID)
 415         {
 416                 /* Load failed, but don't try endlessly again! */
 417                 return NULL;
 418         }
 419
 420         if (images != NULL)
 421         {
 422                 /* Return cached data */
 423                 return ephy_spinner_images_ref (images);
 424         }
 425
 426         images = ephy_spinner_images_load (screen, data->icon_theme, icon_size);
 427
 428         if (images == NULL)
 429         {
 430                 /* Mark as failed-to-load */
 431                 data->images[icon_size] = EPHY_SPINNER_IMAGES_INVALID;
 432
 433                 return NULL;
 434         }
 435
 436         data->images[icon_size] = images;
 437
 438         return ephy_spinner_images_ref (images);
 439 }
 440
 441 static void
 442 ephy_spinner_cache_init (EphySpinnerCache *cache)
 443 {
 444         EphySpinnerCachePrivate *priv;
 445
 446         priv = cache->priv = EPHY_SPINNER_CACHE_GET_PRIVATE (cache);
 447
 448         LOG ("EphySpinnerCache initialising");
 449
 450         priv->hash = g_hash_table_new_full (g_direct_hash, g_direct_equal,
 451                                             NULL,
 452                                             (GDestroyNotify) ephy_spinner_cache_data_free);
 453 }
 454
 455 static void
 456 ephy_spinner_cache_finalize (GObject *object)
 457 {
 458         EphySpinnerCache *cache = EPHY_SPINNER_CACHE (object);
 459         EphySpinnerCachePrivate *priv = cache->priv;
 460
 461         g_hash_table_destroy (priv->hash);
 462
 463         LOG ("EphySpinnerCache finalised");
 464
 465         G_OBJECT_CLASS (ephy_spinner_cache_parent_class)->finalize (object);
 466 }
 467
 468 static void
 469 ephy_spinner_cache_class_init (EphySpinnerCacheClass *klass)
 470 {
 471         GObjectClass *object_class = G_OBJECT_CLASS (klass);
 472
 473         ephy_spinner_cache_parent_class = g_type_class_peek_parent (klass);
 474
 475         object_class->finalize = ephy_spinner_cache_finalize;
 476
 477         g_type_class_add_private (object_class, sizeof (EphySpinnerCachePrivate));
 478 }
 479
 480 static EphySpinnerCache *spinner_cache = NULL;
 481
 482 static EphySpinnerCache *
 483 ephy_spinner_cache_ref (void)
 484 {
 485         if (spinner_cache == NULL)
 486         {
 487                 EphySpinnerCache **cache_ptr;
 488
 489                 spinner_cache = g_object_new (EPHY_TYPE_SPINNER_CACHE, NULL);
 490                 cache_ptr = &spinner_cache;
 491                 g_object_add_weak_pointer (G_OBJECT (spinner_cache),
 492                                            (gpointer *) cache_ptr);
 493
 494                 return spinner_cache;
 495         }
 496
 497         return g_object_ref (spinner_cache);
 498 }
 499
 500 /* Spinner implementation */
 501
 502 #define SPINNER_TIMEOUT 125 /* ms */
 503
 504 #define EPHY_SPINNER_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_SPINNER, EphySpinnerDetails))
 505
 506 struct _EphySpinnerDetails
 507 {
 508         GtkIconTheme *icon_theme;
 509         EphySpinnerCache *cache;
 510         GtkIconSize size;
 511         EphySpinnerImages *images;
 512         guint current_image;
 513         guint timeout;
 514         guint timer_task;
 515         guint spinning : 1;
 516         guint need_load : 1;
 517 };
 518
 519 static void ephy_spinner_class_init (EphySpinnerClass *class);
 520 static void ephy_spinner_init       (EphySpinner *spinner);
 521
 522 static GObjectClass *parent_class;
 523
 524 GType
 525 ephy_spinner_get_type (void)
 526 {
 527         static GType type = 0;
 528
 529         if (G_UNLIKELY (type == 0))
 530         {
 531                 const GTypeInfo our_info =
 532                 {
 533                         sizeof (EphySpinnerClass),
 534                         NULL, /* base_init */
 535                         NULL, /* base_finalize */
 536                         (GClassInitFunc) ephy_spinner_class_init,
 537                         NULL,
 538                         NULL, /* class_data */
 539                         sizeof (EphySpinner),
 540                         0, /* n_preallocs */
 541                         (GInstanceInitFunc) ephy_spinner_init
 542                 };
 543
 544                 type = g_type_register_static (GTK_TYPE_WIDGET,
 545                                                "EphySpinner",
 546                                                &our_info, 0);
 547         }
 548
 549         return type;
 550 }
 551
 552 static gboolean
 553 ephy_spinner_load_images (EphySpinner *spinner)
 554 {
 555         EphySpinnerDetails *details = spinner->details;
 556
 557         if (details->need_load)
 558         {
 559                 START_PROFILER ("ephy_spinner_load_images")
 560
 561                 details->images =
 562                         ephy_spinner_cache_get_images
 563                                 (details->cache,
 564                                  gtk_widget_get_screen (GTK_WIDGET (spinner)),
 565                                  details->size);
 566
 567                 STOP_PROFILER ("ephy_spinner_load_images")
 568
 569                 details->current_image = 0; /* 'rest' icon */
 570                 details->need_load = FALSE;
 571         }
 572
 573         return details->images != NULL;
 574 }
 575
 576 static void
 577 ephy_spinner_unload_images (EphySpinner *spinner)
 578 {
 579         EphySpinnerDetails *details = spinner->details;
 580
 581         if (details->images != NULL)
 582         {
 583                 ephy_spinner_images_unref (details->images);
 584                 details->images = NULL;
 585         }
 586
 587         details->current_image = 0;
 588         details->need_load = TRUE;
 589 }
 590
 591 static void
 592 icon_theme_changed_cb (GtkIconTheme *icon_theme,
 593                        EphySpinner *spinner)
 594 {
 595         ephy_spinner_unload_images (spinner);
 596         gtk_widget_queue_resize (GTK_WIDGET (spinner));
 597 }
 598
 599 static void
 600 ephy_spinner_init (EphySpinner *spinner)
 601 {
 602         EphySpinnerDetails *details;
 603
 604         details = spinner->details = EPHY_SPINNER_GET_PRIVATE (spinner);
 605
 606         GTK_WIDGET_SET_FLAGS (GTK_WIDGET (spinner), GTK_NO_WINDOW);
 607
 608         details->cache = ephy_spinner_cache_ref ();
 609         details->size = GTK_ICON_SIZE_DIALOG;
 610         details->spinning = FALSE;
 611         details->timeout = SPINNER_TIMEOUT;
 612         details->need_load = TRUE;
 613 }
 614
 615 static int
 616 ephy_spinner_expose (GtkWidget *widget,
 617                      GdkEventExpose *event)
 618 {
 619         EphySpinner *spinner = EPHY_SPINNER (widget);
 620         EphySpinnerDetails *details = spinner->details;
 621         EphySpinnerImages *images;
 622         GdkPixbuf *pixbuf;
 623         GdkGC *gc;
 624         int x_offset, y_offset, width, height;
 625         GdkRectangle pix_area, dest;
 626
 627         if (!GTK_WIDGET_DRAWABLE (spinner))
 628         {
 629                 return FALSE;
 630         }
 631
 632         if (details->need_load &&
 633             !ephy_spinner_load_images (spinner))
 634         {
 635                 return FALSE;
 636         }
 637
 638         images = details->images;
 639         if (images == NULL)
 640         {
 641                 return FALSE;
 642         }
 643
 644         /* Otherwise |images| will be NULL anyway */
 645         g_assert (images->n_animation_pixbufs > 0);
 646
 647         g_assert (details->current_image >= 0 &&
 648                   details->current_image < images->n_animation_pixbufs);
 649
 650         pixbuf = images->animation_pixbufs[details->current_image];
 651
 652         g_assert (pixbuf != NULL);
 653
 654         width = gdk_pixbuf_get_width (pixbuf);
 655         height = gdk_pixbuf_get_height (pixbuf);
 656
 657         /* Compute the offsets for the image centered on our allocation */
 658         x_offset = (widget->allocation.width - width) / 2;
 659         y_offset = (widget->allocation.height - height) / 2;
 660
 661         pix_area.x = x_offset + widget->allocation.x;
 662         pix_area.y = y_offset + widget->allocation.y;
 663         pix_area.width = width;
 664         pix_area.height = height;
 665
 666         if (!gdk_rectangle_intersect (&event->area, &pix_area, &dest))
 667         {
 668                 return FALSE;
 669         }
 670
 671         gc = gdk_gc_new (widget->window);
 672         gdk_draw_pixbuf (widget->window, gc, pixbuf,
 673                          dest.x - x_offset - widget->allocation.x,
 674                          dest.y - y_offset - widget->allocation.y,
 675                          dest.x, dest.y,
 676                          dest.width, dest.height,
 677                          GDK_RGB_DITHER_MAX, 0, 0);
 678         g_object_unref (gc);
 679
 680         return FALSE;
 681 }
 682
 683 static gboolean
 684 bump_spinner_frame_cb (EphySpinner *spinner)
 685 {
 686         EphySpinnerDetails *details = spinner->details;
 687
 688         /* This can happen when we've unloaded the images on a theme
 689          * change, but haven't been in the queued size request yet.
 690          * Just skip this update.
 691          */
 692         if (details->images == NULL) return TRUE;
 693
 694         details->current_image++;
 695         if (details->current_image >= details->images->n_animation_pixbufs)
 696         {
 697                 /* the 0th frame is the 'rest' icon */
 698                 details->current_image = MIN (1, details->images->n_animation_pixbufs);
 699         }
 700
 701         gtk_widget_queue_draw (GTK_WIDGET (spinner));
 702
 703         /* run again */
 704         return TRUE;
 705 }
 706
 707 /**
 708  * ephy_spinner_start:
 709  * @spinner: a #EphySpinner
 710  *
 711  * Start the spinner animation.
 712  **/
 713 void
 714 ephy_spinner_start (EphySpinner *spinner)
 715 {
 716         EphySpinnerDetails *details = spinner->details;
 717
 718         details->spinning = TRUE;
 719
 720         if (GTK_WIDGET_MAPPED (GTK_WIDGET (spinner)) &&
 721             details->timer_task == 0 &&
 722             ephy_spinner_load_images (spinner))
 723         {
 724                 /* the 0th frame is the 'rest' icon */
 725                 details->current_image = MIN (1, details->images->n_animation_pixbufs);
 726
 727                 details->timer_task =
 728                         g_timeout_add_full (G_PRIORITY_LOW,
 729                                             details->timeout,
 730                                             (GSourceFunc) bump_spinner_frame_cb,
 731                                             spinner,
 732                                             NULL);
 733         }
 734 }
 735
 736 static void
 737 ephy_spinner_remove_update_callback (EphySpinner *spinner)
 738 {
 739         EphySpinnerDetails *details = spinner->details;
 740
 741         if (details->timer_task != 0)
 742         {
 743                 g_source_remove (details->timer_task);
 744                 details->timer_task = 0;
 745         }
 746 }
 747
 748 /**
 749  * ephy_spinner_stop:
 750  * @spinner: a #EphySpinner
 751  *
 752  * Stop the spinner animation.
 753  **/
 754 void
 755 ephy_spinner_stop (EphySpinner *spinner)
 756 {
 757         EphySpinnerDetails *details = spinner->details;
 758
 759         details->spinning = FALSE;
 760         details->current_image = 0;
 761
 762         if (details->timer_task != 0)
 763         {
 764                 ephy_spinner_remove_update_callback (spinner);
 765
 766                 if (GTK_WIDGET_MAPPED (GTK_WIDGET (spinner)))
 767                 {
 768                         gtk_widget_queue_draw (GTK_WIDGET (spinner));
 769                 }
 770         }
 771 }
 772
 773 /*
 774  * ephy_spinner_set_size:
 775  * @spinner: a #EphySpinner
 776  * @size: the size of type %GtkIconSize
 777  *
 778  * Set the size of the spinner.
 779  **/
 780 void
 781 ephy_spinner_set_size (EphySpinner *spinner,
 782                        GtkIconSize size)
 783 {
 784         if (size == GTK_ICON_SIZE_INVALID)
 785         {
 786                 size = GTK_ICON_SIZE_DIALOG;
 787         }
 788
 789         if (size != spinner->details->size)
 790         {
 791                 ephy_spinner_unload_images (spinner);
 792
 793                 spinner->details->size = size;
 794
 795                 gtk_widget_queue_resize (GTK_WIDGET (spinner));
 796         }
 797 }
 798
 799 #if 0
 800 /*
 801  * ephy_spinner_set_timeout:
 802  * @spinner: a #EphySpinner
 803  * @timeout: time delay between updates to the spinner.
 804  *
 805  * Sets the timeout delay for spinner updates.
 806  **/
 807 void
 808 ephy_spinner_set_timeout (EphySpinner *spinner,
 809                           guint timeout)
 810 {
 811         EphySpinnerDetails *details = spinner->details;
 812
 813         if (timeout != details->timeout)
 814         {
 815                 ephy_spinner_stop (spinner);
 816
 817                 details->timeout = timeout;
 818
 819                 if (details->spinning)
 820                 {
 821                         ephy_spinner_start (spinner);
 822                 }
 823         }
 824 }
 825 #endif
 826
 827 static void
 828 ephy_spinner_size_request (GtkWidget *widget,
 829                            GtkRequisition *requisition)
 830 {
 831         EphySpinner *spinner = EPHY_SPINNER (widget);
 832         EphySpinnerDetails *details = spinner->details;
 833
 834         if ((details->need_load &&
 835              !ephy_spinner_load_images (spinner)) ||
 836             details->images == NULL)
 837         {
 838                 requisition->width = requisition->height = 0;
 839                 gtk_icon_size_lookup_for_settings (gtk_widget_get_settings (widget),
 840                                                    details->size,
 841                                                    &requisition->width,
 842                                                    &requisition->height);
 843                 return;
 844         }
 845
 846         requisition->width = details->images->width;
 847         requisition->height = details->images->height;
 848
 849         /* FIXME fix this hack */
 850         /* allocate some extra margin so we don't butt up against toolbar edges */
 851         if (details->size != GTK_ICON_SIZE_MENU)
 852         {
 853                 requisition->width += 2;
 854                 requisition->height += 2;
 855         }
 856 }
 857
 858 static void
 859 ephy_spinner_map (GtkWidget *widget)
 860 {
 861         EphySpinner *spinner = EPHY_SPINNER (widget);
 862         EphySpinnerDetails *details = spinner->details;
 863
 864         GTK_WIDGET_CLASS (parent_class)->map (widget);
 865
 866         if (details->spinning)
 867         {
 868                 ephy_spinner_start (spinner);
 869         }
 870 }
 871
 872 static void
 873 ephy_spinner_unmap (GtkWidget *widget)
 874 {
 875         EphySpinner *spinner = EPHY_SPINNER (widget);
 876
 877         ephy_spinner_remove_update_callback (spinner);
 878
 879         GTK_WIDGET_CLASS (parent_class)->unmap (widget);
 880 }
 881
 882 static void
 883 ephy_spinner_dispose (GObject *object)
 884 {
 885         EphySpinner *spinner = EPHY_SPINNER (object);
 886
 887         g_signal_handlers_disconnect_by_func
 888                         (spinner->details->icon_theme,
 889                  G_CALLBACK (icon_theme_changed_cb), spinner);
 890
 891         G_OBJECT_CLASS (parent_class)->dispose (object);
 892 }
 893
 894 static void
 895 ephy_spinner_finalize (GObject *object)
 896 {
 897         EphySpinner *spinner = EPHY_SPINNER (object);
 898
 899         ephy_spinner_remove_update_callback (spinner);
 900         ephy_spinner_unload_images (spinner);
 901
 902         g_object_unref (spinner->details->cache);
 903
 904         G_OBJECT_CLASS (parent_class)->finalize (object);
 905 }
 906
 907 static void
 908 ephy_spinner_screen_changed (GtkWidget *widget,
 909                              GdkScreen *old_screen)
 910 {
 911         EphySpinner *spinner = EPHY_SPINNER (widget);
 912         EphySpinnerDetails *details = spinner->details;
 913         GdkScreen *screen;
 914
 915         if (GTK_WIDGET_CLASS (parent_class)->screen_changed)
 916         {
 917                 GTK_WIDGET_CLASS (parent_class)->screen_changed (widget, old_screen);
 918         }
 919
 920         screen = gtk_widget_get_screen (widget);
 921
 922         /* FIXME: this seems to be happening when then spinner is destroyed!? */
 923         if (old_screen == screen) return;
 924
 925         /* We'll get mapped again on the new screen, but not unmapped from
 926          * the old screen, so remove timeout here.
 927          */
 928         ephy_spinner_remove_update_callback (spinner);
 929
 930         ephy_spinner_unload_images (spinner);
 931
 932         if (old_screen != NULL)
 933         {
 934                 g_signal_handlers_disconnect_by_func
 935                         (gtk_icon_theme_get_for_screen (old_screen),
 936                          G_CALLBACK (icon_theme_changed_cb), spinner);
 937         }
 938
 939         details->icon_theme = gtk_icon_theme_get_for_screen (screen);
 940         g_signal_connect (details->icon_theme, "changed",
 941                           G_CALLBACK (icon_theme_changed_cb), spinner);
 942 }
 943
 944 static void
 945 ephy_spinner_class_init (EphySpinnerClass *class)
 946 {
 947         GObjectClass *object_class =  G_OBJECT_CLASS (class);
 948         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 949
 950         parent_class = g_type_class_peek_parent (class);
 951
 952         object_class->dispose = ephy_spinner_dispose;
 953         object_class->finalize = ephy_spinner_finalize;
 954
 955         widget_class->expose_event = ephy_spinner_expose;
 956         widget_class->size_request = ephy_spinner_size_request;
 957         widget_class->map = ephy_spinner_map;
 958         widget_class->unmap = ephy_spinner_unmap;
 959         widget_class->screen_changed = ephy_spinner_screen_changed;
 960
 961         g_type_class_add_private (object_class, sizeof (EphySpinnerDetails));
 962 }
 963
 964 /*
 965  * ephy_spinner_new:
 966  *
 967  * Create a new #EphySpinner. The spinner is a widget
 968  * that gives the user feedback about network status with
 969  * an animated image.
 970  *
 971  * Return Value: the spinner #GtkWidget
 972  **/
 973 GtkWidget *
 974 ephy_spinner_new (void)
 975 {
 976         return GTK_WIDGET (g_object_new (EPHY_TYPE_SPINNER, NULL));
 977 }