libempathy-gtk/empathy-avatar-chooser.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * Copyright (C) 2006-2007 Imendio AB.
   4  * Copyright (C) 2007-2008 Collabora Ltd.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of version 2 of the GNU General Public
   8  * License as published by the Free Software Foundation.
   9  *
  10  * This program 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  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  18  * Boston, MA  02110-1301  USA
  19  *
  20  * Authors: Based on Novell's e-image-chooser.
  21  *          Xavier Claessens <xclaesse@gmail.com>
  22  */
  23
  24 #include "config.h"
  25
  26 #include <string.h>
  27
  28 #include <glib/gi18n-lib.h>
  29 #include <gtk/gtk.h>
  30 #include <gio/gio.h>
  31
  32 #include <libempathy/empathy-utils.h>
  33 #include <libempathy/empathy-tp-contact-factory.h>
  34
  35 #include "empathy-avatar-chooser.h"
  36 #include "empathy-conf.h"
  37 #include "empathy-ui-utils.h"
  38
  39 #define DEBUG_FLAG EMPATHY_DEBUG_OTHER
  40 #include <libempathy/empathy-debug.h>
  41
  42 /**
  43  * SECTION:empathy-avatar-chooser
  44  * @title: EmpathyAvatarChooser
  45  * @short_description: A widget used to change avatar
  46  * @include: libempathy-gtk/empathy-avatar-chooser.h
  47  *
  48  * #EmpathyAvatarChooser is a widget which extends #GtkButton to
  49  * provide a way of changing avatar.
  50  */
  51
  52 /**
  53  * EmpathyAvatarChooser:
  54  * @parent: parent object
  55  *
  56  * Widget which extends #GtkButton to provide a way of changing avatar.
  57  */
  58
  59 #define AVATAR_SIZE_SAVE 96
  60 #define AVATAR_SIZE_VIEW 64
  61 #define DEFAULT_DIR DATADIR"/pixmaps/faces"
  62
  63 #define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyAvatarChooser)
  64 typedef struct {
  65         EmpathyTpContactFactory *factory;
  66         TpConnection            *connection;
  67         GtkFileChooser          *chooser_dialog;
  68
  69         gulong ready_handler_id;
  70
  71         EmpathyAvatar *avatar;
  72 } EmpathyAvatarChooserPriv;
  73
  74 static void       avatar_chooser_finalize              (GObject              *object);
  75 static void       avatar_chooser_set_connection        (EmpathyAvatarChooser *self,
  76                                                         TpConnection         *connection);
  77 static void       avatar_chooser_set_image             (EmpathyAvatarChooser *chooser,
  78                                                         EmpathyAvatar        *avatar,
  79                                                         GdkPixbuf            *pixbuf,
  80                                                         gboolean              set_locally);
  81 static gboolean   avatar_chooser_drag_motion_cb        (GtkWidget            *widget,
  82                                                         GdkDragContext       *context,
  83                                                         gint                  x,
  84                                                         gint                  y,
  85                                                         guint                 time,
  86                                                         EmpathyAvatarChooser *chooser);
  87 static void       avatar_chooser_drag_leave_cb         (GtkWidget            *widget,
  88                                                         GdkDragContext       *context,
  89                                                         guint                 time,
  90                                                         EmpathyAvatarChooser *chooser);
  91 static gboolean   avatar_chooser_drag_drop_cb          (GtkWidget            *widget,
  92                                                         GdkDragContext       *context,
  93                                                         gint                  x,
  94                                                         gint                  y,
  95                                                         guint                 time,
  96                                                         EmpathyAvatarChooser *chooser);
  97 static void       avatar_chooser_drag_data_received_cb (GtkWidget            *widget,
  98                                                         GdkDragContext       *context,
  99                                                         gint                  x,
 100                                                         gint                  y,
 101                                                         GtkSelectionData     *selection_data,
 102                                                         guint                 info,
 103                                                         guint                 time,
 104                                                         EmpathyAvatarChooser *chooser);
 105 static void       avatar_chooser_clicked_cb            (GtkWidget            *button,
 106                                                         EmpathyAvatarChooser *chooser);
 107
 108 enum {
 109         CHANGED,
 110         LAST_SIGNAL
 111 };
 112
 113 enum {
 114         PROP_0,
 115         PROP_CONNECTION
 116 };
 117
 118 static guint signals [LAST_SIGNAL];
 119
 120 G_DEFINE_TYPE (EmpathyAvatarChooser, empathy_avatar_chooser, GTK_TYPE_BUTTON);
 121
 122 /*
 123  * Drag and drop stuff
 124  */
 125 #define URI_LIST_TYPE "text/uri-list"
 126
 127 enum DndTargetType {
 128         DND_TARGET_TYPE_URI_LIST
 129 };
 130
 131 static const GtkTargetEntry drop_types[] = {
 132         { URI_LIST_TYPE, 0, DND_TARGET_TYPE_URI_LIST },
 133 };
 134
 135 static void
 136 avatar_chooser_get_property (GObject    *object,
 137                              guint       param_id,
 138                              GValue     *value,
 139                              GParamSpec *pspec)
 140 {
 141         EmpathyAvatarChooserPriv *priv = GET_PRIV (object);
 142
 143         switch (param_id) {
 144         case PROP_CONNECTION:
 145                 g_value_set_object (value, priv->connection);
 146                 break;
 147         default:
 148                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 149                 break;
 150         }
 151 }
 152
 153 static void
 154 avatar_chooser_set_property (GObject      *object,
 155                              guint         param_id,
 156                              const GValue *value,
 157                              GParamSpec   *pspec)
 158 {
 159         EmpathyAvatarChooser *self = EMPATHY_AVATAR_CHOOSER (object);
 160
 161         switch (param_id) {
 162         case PROP_CONNECTION:
 163                 avatar_chooser_set_connection (self, g_value_get_object (value));
 164                 break;
 165         default:
 166                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 167                 break;
 168         }
 169 }
 170
 171 static void
 172 empathy_avatar_chooser_class_init (EmpathyAvatarChooserClass *klass)
 173 {
 174         GObjectClass *object_class = G_OBJECT_CLASS (klass);
 175         GParamSpec *param_spec;
 176
 177         object_class->finalize = avatar_chooser_finalize;
 178         object_class->get_property = avatar_chooser_get_property;
 179         object_class->set_property = avatar_chooser_set_property;
 180
 181         /**
 182          * EmpathyAvatarChooser::changed:
 183          * @chooser: an #EmpathyAvatarChooser
 184          *
 185          * Emitted when the chosen avatar has changed.
 186          *
 187          */
 188         signals[CHANGED] =
 189                 g_signal_new ("changed",
 190                               G_TYPE_FROM_CLASS (klass),
 191                               G_SIGNAL_RUN_LAST,
 192                               0,
 193                               NULL, NULL,
 194                               g_cclosure_marshal_VOID__VOID,
 195                               G_TYPE_NONE, 0);
 196
 197         /**
 198          * EmpathyAvatarChooser:connection:
 199          *
 200          * The #TpConnection whose avatar should be shown and modified by
 201          * the #EmpathyAvatarChooser instance.
 202          */
 203         param_spec = g_param_spec_object ("connection",
 204                                           "TpConnection",
 205                                           "TpConnection whose avatar should be "
 206                                           "shown and modified by this widget",
 207                                           TP_TYPE_CONNECTION,
 208                                           G_PARAM_READWRITE |
 209                                           G_PARAM_STATIC_STRINGS);
 210         g_object_class_install_property (object_class,
 211                                          PROP_CONNECTION,
 212                                          param_spec);
 213
 214         g_type_class_add_private (object_class, sizeof (EmpathyAvatarChooserPriv));
 215 }
 216
 217 static void
 218 empathy_avatar_chooser_init (EmpathyAvatarChooser *chooser)
 219 {
 220         EmpathyAvatarChooserPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (chooser,
 221                 EMPATHY_TYPE_AVATAR_CHOOSER, EmpathyAvatarChooserPriv);
 222
 223         chooser->priv = priv;
 224         gtk_drag_dest_set (GTK_WIDGET (chooser),
 225                            GTK_DEST_DEFAULT_ALL,
 226                            drop_types,
 227                            G_N_ELEMENTS (drop_types),
 228                            GDK_ACTION_COPY);
 229
 230         g_signal_connect (chooser, "drag-motion",
 231                           G_CALLBACK (avatar_chooser_drag_motion_cb),
 232                           chooser);
 233         g_signal_connect (chooser, "drag-leave",
 234                           G_CALLBACK (avatar_chooser_drag_leave_cb),
 235                           chooser);
 236         g_signal_connect (chooser, "drag-drop",
 237                           G_CALLBACK (avatar_chooser_drag_drop_cb),
 238                           chooser);
 239         g_signal_connect (chooser, "drag-data-received",
 240                           G_CALLBACK (avatar_chooser_drag_data_received_cb),
 241                           chooser);
 242         g_signal_connect (chooser, "clicked",
 243                           G_CALLBACK (avatar_chooser_clicked_cb),
 244                           chooser);
 245
 246         empathy_avatar_chooser_set (chooser, NULL);
 247 }
 248
 249 static void
 250 avatar_chooser_finalize (GObject *object)
 251 {
 252         EmpathyAvatarChooserPriv *priv;
 253
 254         priv = GET_PRIV (object);
 255
 256         avatar_chooser_set_connection (EMPATHY_AVATAR_CHOOSER (object), NULL);
 257         g_assert (priv->connection == NULL);
 258         g_assert (priv->factory == NULL);
 259
 260         if (priv->avatar != NULL) {
 261                 empathy_avatar_unref (priv->avatar);
 262         }
 263
 264         G_OBJECT_CLASS (empathy_avatar_chooser_parent_class)->finalize (object);
 265 }
 266
 267 static void
 268 avatar_chooser_set_connection (EmpathyAvatarChooser *self,
 269                                TpConnection         *connection)
 270 {
 271         EmpathyAvatarChooserPriv *priv = GET_PRIV (self);
 272
 273         if (priv->connection != NULL) {
 274                 g_object_unref (priv->connection);
 275                 priv->connection = NULL;
 276
 277                 g_object_unref (priv->factory);
 278                 priv->factory = NULL;
 279         }
 280
 281         if (connection != NULL) {
 282                 priv->connection = g_object_ref (connection);
 283                 priv->factory = empathy_tp_contact_factory_dup_singleton (connection);
 284         }
 285 }
 286
 287 static void
 288 avatar_chooser_error_show (EmpathyAvatarChooser *chooser,
 289                            const gchar          *primary_text,
 290                            const gchar          *secondary_text)
 291 {
 292         GtkWidget *parent;
 293         GtkWidget *dialog;
 294
 295         parent = gtk_widget_get_toplevel (GTK_WIDGET (chooser));
 296         if (!GTK_IS_WINDOW (parent)) {
 297                 parent = NULL;
 298         }
 299
 300         dialog = gtk_message_dialog_new (parent ? GTK_WINDOW (parent) : NULL,
 301                                          GTK_DIALOG_MODAL,
 302                                          GTK_MESSAGE_WARNING,
 303                                          GTK_BUTTONS_CLOSE,
 304                                          "%s", primary_text);
 305
 306         if (secondary_text != NULL) {
 307                 gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
 308                                                           "%s", secondary_text);
 309         }
 310
 311         g_signal_connect (dialog, "response",
 312                           G_CALLBACK (gtk_widget_destroy), NULL);
 313         gtk_widget_show (dialog);
 314
 315 }
 316
 317 static gboolean
 318 str_in_strv (const gchar  *str,
 319              gchar **strv)
 320 {
 321         if (strv == NULL) {
 322                 return FALSE;
 323         }
 324
 325         while (*strv != NULL) {
 326                 if (g_str_equal (str, *strv)) {
 327                         return TRUE;
 328                 }
 329                 strv++;
 330         }
 331         return FALSE;
 332 }
 333
 334 /* The caller must free the strings stored in satisfactory_format_name and
 335  * satisfactory_mime_type.
 336  */
 337 static gboolean
 338 avatar_chooser_need_mime_type_conversion (const gchar *current_mime_type,
 339                                           gchar      **accepted_mime_types,
 340                                           gchar      **satisfactory_format_name,
 341                                           gchar      **satisfactory_mime_type)
 342 {
 343         gchar   *good_mime_types[] = {"image/jpeg", "image/png", NULL};
 344         guint    i;
 345         GSList  *formats, *l;
 346         gboolean found = FALSE;
 347
 348         *satisfactory_format_name = NULL;
 349         *satisfactory_mime_type = NULL;
 350
 351         /* If there is no accepted format there is nothing we can do */
 352         if (accepted_mime_types == NULL || *accepted_mime_types == NULL) {
 353                 return TRUE;
 354         }
 355
 356         /* If the current mime type is good and accepted, don't change it!
 357          * jpeg is compress better pictures, but png is better for logos and
 358          * could have an alpha layer. */
 359         if (str_in_strv (current_mime_type, good_mime_types) &&
 360             str_in_strv (current_mime_type, accepted_mime_types)) {
 361                 *satisfactory_mime_type = g_strdup (current_mime_type);
 362                 *satisfactory_format_name = g_strdup (current_mime_type +
 363                                                       strlen ("image/"));
 364                 return FALSE;
 365         }
 366
 367         /* The current mime type is either not accepted or not good to use.
 368          * Check if one of the good format is supported... */
 369         for (i = 0; good_mime_types[i] != NULL;  i++) {
 370                 if (str_in_strv (good_mime_types[i], accepted_mime_types)) {
 371                         *satisfactory_mime_type = g_strdup (good_mime_types[i]);
 372                         *satisfactory_format_name = g_strdup (good_mime_types[i] +
 373                                                               strlen ("image/"));
 374                         return TRUE;
 375                 }
 376         }
 377
 378         /* Pick the first supported format we can write */
 379         formats = gdk_pixbuf_get_formats ();
 380         for (l = formats; !found && l != NULL; l = l->next) {
 381                 GdkPixbufFormat *format = l->data;
 382                 gchar **format_mime_types;
 383                 gchar **iter;
 384
 385                 if (!gdk_pixbuf_format_is_writable (format)) {
 386                         continue;
 387                 }
 388
 389                 format_mime_types = gdk_pixbuf_format_get_mime_types (format);
 390                 for (iter = format_mime_types; *iter != NULL; iter++) {
 391                         if (str_in_strv (*iter, accepted_mime_types)) {
 392                                 *satisfactory_format_name = gdk_pixbuf_format_get_name (format);
 393                                 *satisfactory_mime_type = g_strdup (*iter);
 394                                 found = TRUE;
 395                                 break;
 396                         }
 397                 }
 398                 g_strfreev (format_mime_types);
 399         }
 400         g_slist_free (formats);
 401
 402         return TRUE;
 403 }
 404
 405 static EmpathyAvatar *
 406 avatar_chooser_maybe_convert_and_scale (EmpathyAvatarChooser *chooser,
 407                                         GdkPixbuf            *pixbuf,
 408                                         EmpathyAvatar        *avatar)
 409 {
 410         EmpathyAvatarChooserPriv *priv = GET_PRIV (chooser);
 411         guint                     max_width = 0, max_height = 0, max_size = 0;
 412         gchar                   **mime_types = NULL;
 413         gboolean                  needs_conversion = FALSE;
 414         gint                      width, height;
 415         gchar                    *new_format_name = NULL;
 416         gchar                    *new_mime_type = NULL;
 417         gdouble                   min_factor, max_factor;
 418         gdouble                   factor;
 419         gchar                    *converted_image_data = NULL;
 420         gsize                     converted_image_size = 0;
 421
 422         g_object_get (priv->factory,
 423                 "avatar-mime-types", &mime_types, /* Needs g_strfreev-ing */
 424                 "avatar-max-width", &max_width,
 425                 "avatar-max-height", &max_height,
 426                 "avatar-max-size", &max_size,
 427                 NULL);
 428
 429         /* Smaller is the factor, smaller will be the image.
 430          * 0 is an empty image, 1 is the full size. */
 431         min_factor = 0;
 432         max_factor = 1;
 433         factor = 1;
 434
 435         /* Check if we need to convert to another image format */
 436         if (avatar_chooser_need_mime_type_conversion (avatar->format,
 437                                                       mime_types,
 438                                                       &new_format_name,
 439                                                       &new_mime_type)) {
 440                 DEBUG ("Format conversion needed, we'll use mime type '%s' "
 441                        "and format name '%s'. Current mime type is '%s'",
 442                        new_mime_type, new_format_name, avatar->format);
 443                 needs_conversion = TRUE;
 444         }
 445         g_strfreev (mime_types);
 446
 447         /* If there is no format we can use, report error to the user. */
 448         if (new_mime_type == NULL || new_format_name == NULL) {
 449                 avatar_chooser_error_show (chooser, _("Couldn't convert image"),
 450                                 _("None of the accepted image formats is "
 451                                   "supported on your system"));
 452                 return NULL;
 453         }
 454
 455         /* If width or height are too big, it needs converting. */
 456         width = gdk_pixbuf_get_width (pixbuf);
 457         height = gdk_pixbuf_get_height (pixbuf);
 458         if ((max_width > 0 && width > max_width) ||
 459             (max_height > 0 && height > max_height)) {
 460                 gdouble h_factor, v_factor;
 461
 462                 h_factor = (gdouble) max_width / width;
 463                 v_factor = (gdouble) max_height / height;
 464                 factor = max_factor = MIN (h_factor, v_factor);
 465
 466                 DEBUG ("Image dimensions (%dx%d) are too big. Max is %dx%d.",
 467                        width, height, max_width, max_height);
 468
 469                 needs_conversion = TRUE;
 470         }
 471
 472         /* If the data len is too big and no other conversion is needed,
 473          * try with a lower factor. */
 474         if (max_size > 0 && avatar->len > max_size && !needs_conversion) {
 475                 DEBUG ("Image data (%"G_GSIZE_FORMAT" bytes) is too big "
 476                        "(max is %u bytes), conversion needed.",
 477                        avatar->len, max_size);
 478
 479                 factor = 0.5;
 480                 needs_conversion = TRUE;
 481         }
 482
 483         /* If no conversion is needed, return the avatar */
 484         if (!needs_conversion) {
 485                 g_free (new_format_name);
 486                 g_free (new_mime_type);
 487                 return empathy_avatar_ref (avatar);
 488         }
 489
 490         do {
 491                 GdkPixbuf *pixbuf_scaled = NULL;
 492                 gboolean   saved;
 493                 gint       new_width, new_height;
 494                 GError    *error = NULL;
 495
 496                 g_free (converted_image_data);
 497
 498                 if (factor != 1) {
 499                         new_width = width * factor;
 500                         new_height = height * factor;
 501                         pixbuf_scaled = gdk_pixbuf_scale_simple (pixbuf,
 502                                                                  new_width,
 503                                                                  new_height,
 504                                                                  GDK_INTERP_HYPER);
 505                 } else {
 506                         new_width = width;
 507                         new_height = height;
 508                         pixbuf_scaled = g_object_ref (pixbuf);
 509                 }
 510
 511                 DEBUG ("Trying with factor %f (%dx%d) and format %s...", factor,
 512                         new_width, new_height, new_format_name);
 513
 514                 saved = gdk_pixbuf_save_to_buffer (pixbuf_scaled,
 515                                                    &converted_image_data,
 516                                                    &converted_image_size,
 517                                                    new_format_name,
 518                                                    &error, NULL);
 519                 g_object_unref (pixbuf_scaled);
 520
 521                 if (!saved) {
 522                         g_free (new_format_name);
 523                         g_free (new_mime_type);
 524                         avatar_chooser_error_show (chooser,
 525                                 _("Couldn't convert image"),
 526                                 error ? error->message : NULL);
 527                         g_clear_error (&error);
 528                         return NULL;
 529                 }
 530
 531                 DEBUG ("Produced an image data of %"G_GSIZE_FORMAT" bytes.",
 532                         converted_image_size);
 533
 534                 if (max_size == 0)
 535                         break;
 536
 537                 /* Make a binary search for the bigest factor that produce
 538                  * an image data size less than max_size */
 539                 if (converted_image_size > max_size)
 540                         max_factor = factor;
 541                 if (converted_image_size < max_size)
 542                         min_factor = factor;
 543                 factor = (min_factor + max_factor)/2;
 544
 545                 /* We are done if either:
 546                  * - min_factor == max_factor. That happens if we resized to
 547                  *   the max required dimension and the produced data size is
 548                  *   less than max_size.
 549                  * - The data size is close enough to max_size. Here we accept
 550                  *   a difference of 1k.
 551                  */
 552         } while (min_factor != max_factor &&
 553                  ABS (max_size - converted_image_size) > 1024);
 554         g_free (new_format_name);
 555
 556         /* Takes ownership of new_mime_type and converted_image_data */
 557         avatar = empathy_avatar_new (converted_image_data,
 558                 converted_image_size, new_mime_type, NULL, NULL);
 559
 560         return avatar;
 561 }
 562
 563 static void
 564 avatar_chooser_clear_image (EmpathyAvatarChooser *chooser)
 565 {
 566         EmpathyAvatarChooserPriv *priv = GET_PRIV (chooser);
 567         GtkWidget *image;
 568
 569         if (priv->avatar != NULL) {
 570                 empathy_avatar_unref (priv->avatar);
 571                 priv->avatar = NULL;
 572         }
 573
 574         image = gtk_image_new_from_icon_name ("stock_person", GTK_ICON_SIZE_DIALOG);
 575         gtk_button_set_image (GTK_BUTTON (chooser), image);
 576         g_signal_emit (chooser, signals[CHANGED], 0);
 577 }
 578
 579 static void
 580 avatar_chooser_set_image_from_data (EmpathyAvatarChooser *chooser,
 581                                     gchar                *data,
 582                                     gsize                 size,
 583                                     gboolean              set_locally)
 584 {
 585         GdkPixbuf     *pixbuf;
 586         EmpathyAvatar *avatar = NULL;
 587         gchar         *mime_type = NULL;
 588
 589         if (data == NULL) {
 590                 avatar_chooser_clear_image (chooser);
 591                 return;
 592         }
 593
 594         pixbuf = empathy_pixbuf_from_data_and_mime (data, size, &mime_type);
 595         if (pixbuf == NULL) {
 596                 g_free (data);
 597                 data = NULL;
 598                 return;
 599         }
 600
 601         /* avatar takes ownership of data and mime_type */
 602         avatar = empathy_avatar_new (data, size, mime_type, NULL, NULL);
 603
 604         avatar_chooser_set_image (chooser, avatar, pixbuf, set_locally);
 605 }
 606
 607 static void
 608 avatar_chooser_set_image_from_avatar (EmpathyAvatarChooser *chooser,
 609                                       EmpathyAvatar        *avatar,
 610                                       gboolean              set_locally)
 611 {
 612         GdkPixbuf *pixbuf;
 613         gchar     *mime_type = NULL;
 614
 615         g_assert (avatar != NULL);
 616
 617         pixbuf = empathy_pixbuf_from_data_and_mime (avatar->data,
 618                                                     avatar->len,
 619                                                     &mime_type);
 620         if (pixbuf == NULL) {
 621                 DEBUG ("couldn't make a pixbuf from avatar; giving up");
 622                 return;
 623         }
 624
 625         if (avatar->format == NULL) {
 626                 avatar->format = mime_type;
 627         } else {
 628                 if (strcmp (mime_type, avatar->format)) {
 629                         DEBUG ("avatar->format is %s; gdkpixbuf yields %s!",
 630                                 avatar->format, mime_type);
 631                 }
 632                 g_free (mime_type);
 633         }
 634
 635         empathy_avatar_ref (avatar);
 636
 637         avatar_chooser_set_image (chooser, avatar, pixbuf, set_locally);
 638 }
 639
 640 static void
 641 avatar_chooser_set_image (EmpathyAvatarChooser *chooser,
 642                           EmpathyAvatar        *avatar,
 643                           GdkPixbuf            *pixbuf,
 644                           gboolean              set_locally)
 645 {
 646         EmpathyAvatarChooserPriv *priv = GET_PRIV (chooser);
 647         GdkPixbuf                *pixbuf_view;
 648         GtkWidget                *image;
 649
 650         g_assert (avatar != NULL);
 651         g_assert (pixbuf != NULL);
 652
 653         if (set_locally) {
 654                 EmpathyAvatar *conv;
 655
 656                 conv = avatar_chooser_maybe_convert_and_scale (chooser,
 657                         pixbuf, avatar);
 658                 empathy_avatar_unref (avatar);
 659
 660                 if (conv == NULL) {
 661                         /* An error occured; don't change the avatar. */
 662                         return;
 663                 }
 664
 665                 avatar = conv;
 666         }
 667
 668         if (priv->avatar != NULL) {
 669                 empathy_avatar_unref (priv->avatar);
 670         }
 671         priv->avatar = avatar;
 672
 673         pixbuf_view = empathy_pixbuf_scale_down_if_necessary (pixbuf, AVATAR_SIZE_VIEW);
 674         image = gtk_image_new_from_pixbuf (pixbuf_view);
 675
 676         gtk_button_set_image (GTK_BUTTON (chooser), image);
 677         g_signal_emit (chooser, signals[CHANGED], 0);
 678
 679         g_object_unref (pixbuf_view);
 680         g_object_unref (pixbuf);
 681 }
 682
 683 static void
 684 avatar_chooser_set_image_from_file (EmpathyAvatarChooser *chooser,
 685                                     const gchar          *filename)
 686 {
 687         gchar  *image_data = NULL;
 688         gsize   image_size = 0;
 689         GError *error = NULL;
 690
 691         if (!g_file_get_contents (filename, &image_data, &image_size, &error)) {
 692                 DEBUG ("Failed to load image from '%s': %s", filename,
 693                         error ? error->message : "No error given");
 694
 695                 g_clear_error (&error);
 696                 return;
 697         }
 698
 699         avatar_chooser_set_image_from_data (chooser, image_data, image_size, TRUE);
 700 }
 701
 702 static gboolean
 703 avatar_chooser_drag_motion_cb (GtkWidget          *widget,
 704                               GdkDragContext     *context,
 705                               gint                x,
 706                               gint                y,
 707                               guint               time,
 708                               EmpathyAvatarChooser *chooser)
 709 {
 710         EmpathyAvatarChooserPriv *priv;
 711         GList                  *p;
 712
 713         priv = GET_PRIV (chooser);
 714
 715         for (p = context->targets; p != NULL; p = p->next) {
 716                 gchar *possible_type;
 717
 718                 possible_type = gdk_atom_name (GDK_POINTER_TO_ATOM (p->data));
 719
 720                 if (!strcmp (possible_type, URI_LIST_TYPE)) {
 721                         g_free (possible_type);
 722                         gdk_drag_status (context, GDK_ACTION_COPY, time);
 723
 724                         return TRUE;
 725                 }
 726
 727                 g_free (possible_type);
 728         }
 729
 730         return FALSE;
 731 }
 732
 733 static void
 734 avatar_chooser_drag_leave_cb (GtkWidget          *widget,
 735                              GdkDragContext     *context,
 736                              guint               time,
 737                              EmpathyAvatarChooser *chooser)
 738 {
 739 }
 740
 741 static gboolean
 742 avatar_chooser_drag_drop_cb (GtkWidget          *widget,
 743                             GdkDragContext     *context,
 744                             gint                x,
 745                             gint                y,
 746                             guint               time,
 747                             EmpathyAvatarChooser *chooser)
 748 {
 749         EmpathyAvatarChooserPriv *priv;
 750         GList                  *p;
 751
 752         priv = GET_PRIV (chooser);
 753
 754         if (context->targets == NULL) {
 755                 return FALSE;
 756         }
 757
 758         for (p = context->targets; p != NULL; p = p->next) {
 759                 char *possible_type;
 760
 761                 possible_type = gdk_atom_name (GDK_POINTER_TO_ATOM (p->data));
 762                 if (!strcmp (possible_type, URI_LIST_TYPE)) {
 763                         g_free (possible_type);
 764                         gtk_drag_get_data (widget, context,
 765                                            GDK_POINTER_TO_ATOM (p->data),
 766                                            time);
 767
 768                         return TRUE;
 769                 }
 770
 771                 g_free (possible_type);
 772         }
 773
 774         return FALSE;
 775 }
 776
 777 static void
 778 avatar_chooser_drag_data_received_cb (GtkWidget          *widget,
 779                                      GdkDragContext     *context,
 780                                      gint                x,
 781                                      gint                y,
 782                                      GtkSelectionData   *selection_data,
 783                                      guint               info,
 784                                      guint               time,
 785                                      EmpathyAvatarChooser *chooser)
 786 {
 787         gchar    *target_type;
 788         gboolean  handled = FALSE;
 789
 790         target_type = gdk_atom_name (gtk_selection_data_get_target (selection_data));
 791         if (!strcmp (target_type, URI_LIST_TYPE)) {
 792                 GFile            *file;
 793                 gchar            *nl;
 794                 gchar            *data = NULL;
 795                 gsize             bytes_read;
 796
 797                 nl = strstr (gtk_selection_data_get_data (selection_data), "\r\n");
 798                 if (nl) {
 799                         gchar *uri;
 800
 801                         uri = g_strndup (gtk_selection_data_get_data (selection_data),
 802                                          nl - (gchar *) gtk_selection_data_get_data (selection_data));
 803
 804                         file = g_file_new_for_uri (uri);
 805                         g_free (uri);
 806                 } else {
 807                         file = g_file_new_for_uri (gtk_selection_data_get_data (selection_data));
 808                 }
 809
 810                 handled = g_file_load_contents (file, NULL, &data, &bytes_read,
 811                                                 NULL, NULL);
 812
 813                 if (handled) {
 814                         /* this in turn calls empathy_avatar_new(), which assumes
 815                          * ownership of data.
 816                          */
 817                         avatar_chooser_set_image_from_data (chooser, data,
 818                                                             bytes_read,
 819                                                             TRUE);
 820                 }
 821
 822                 g_object_unref (file);
 823         }
 824
 825         gtk_drag_finish (context, handled, FALSE, time);
 826 }
 827
 828 static void
 829 avatar_chooser_update_preview_cb (GtkFileChooser       *file_chooser,
 830                                   EmpathyAvatarChooser *chooser)
 831 {
 832         gchar *filename;
 833
 834         filename = gtk_file_chooser_get_preview_filename (file_chooser);
 835
 836         if (filename) {
 837                 GtkWidget *image;
 838                 GdkPixbuf *pixbuf = NULL;
 839                 GdkPixbuf *scaled_pixbuf;
 840
 841                 pixbuf = gdk_pixbuf_new_from_file (filename, NULL);
 842
 843                 image = gtk_file_chooser_get_preview_widget (file_chooser);
 844
 845                 if (pixbuf) {
 846                         scaled_pixbuf = empathy_pixbuf_scale_down_if_necessary (pixbuf, AVATAR_SIZE_SAVE);
 847                         gtk_image_set_from_pixbuf (GTK_IMAGE (image), scaled_pixbuf);
 848                         g_object_unref (scaled_pixbuf);
 849                         g_object_unref (pixbuf);
 850                 } else {
 851                         gtk_image_set_from_stock (GTK_IMAGE (image),
 852                                                   "gtk-dialog-question",
 853                                                   GTK_ICON_SIZE_DIALOG);
 854                 }
 855
 856                 g_free (filename);
 857         }
 858
 859         gtk_file_chooser_set_preview_widget_active (file_chooser, TRUE);
 860 }
 861
 862 static void
 863 avatar_chooser_response_cb (GtkWidget            *widget,
 864                             gint                  response,
 865                             EmpathyAvatarChooser *chooser)
 866 {
 867         EmpathyAvatarChooserPriv *priv = GET_PRIV (chooser);
 868
 869         priv->chooser_dialog = NULL;
 870
 871         if (response == GTK_RESPONSE_OK) {
 872                 gchar *filename;
 873                 gchar *path;
 874
 875                 filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (widget));
 876                 avatar_chooser_set_image_from_file (chooser, filename);
 877                 g_free (filename);
 878
 879                 path = gtk_file_chooser_get_current_folder (GTK_FILE_CHOOSER (widget));
 880                 if (path) {
 881                         empathy_conf_set_string (empathy_conf_get (),
 882                                                  EMPATHY_PREFS_UI_AVATAR_DIRECTORY,
 883                                                  path);
 884                         g_free (path);
 885                 }
 886         }
 887         else if (response == GTK_RESPONSE_NO) {
 888                 /* This corresponds to "No Image", not to "Cancel" */
 889                 avatar_chooser_clear_image (chooser);
 890         }
 891
 892         gtk_widget_destroy (widget);
 893 }
 894
 895 static void
 896 avatar_chooser_clicked_cb (GtkWidget            *button,
 897                            EmpathyAvatarChooser *chooser)
 898 {
 899         GtkFileChooser *chooser_dialog;
 900         GtkWidget      *image;
 901         gchar          *saved_dir = NULL;
 902         const gchar    *default_dir = DEFAULT_DIR;
 903         const gchar    *pics_dir;
 904         GtkFileFilter  *filter;
 905         EmpathyAvatarChooserPriv *priv = GET_PRIV (chooser);
 906
 907         if (priv->chooser_dialog) {
 908                 gtk_window_present (GTK_WINDOW (priv->chooser_dialog));
 909                 return;
 910         }
 911
 912         priv->chooser_dialog = GTK_FILE_CHOOSER (
 913                 gtk_file_chooser_dialog_new (_("Select Your Avatar Image"),
 914                                              empathy_get_toplevel_window (GTK_WIDGET (chooser)),
 915                                              GTK_FILE_CHOOSER_ACTION_OPEN,
 916                                              _("No Image"),
 917                                              GTK_RESPONSE_NO,
 918                                              GTK_STOCK_CANCEL,
 919                                              GTK_RESPONSE_CANCEL,
 920                                              GTK_STOCK_OPEN,
 921                                              GTK_RESPONSE_OK,
 922                                              NULL));
 923         chooser_dialog = priv->chooser_dialog;
 924         gtk_window_set_destroy_with_parent (GTK_WINDOW (chooser_dialog), TRUE);
 925
 926         /* Get special dirs */
 927         empathy_conf_get_string (empathy_conf_get (),
 928                                  EMPATHY_PREFS_UI_AVATAR_DIRECTORY,
 929                                  &saved_dir);
 930         if (saved_dir && !g_file_test (saved_dir, G_FILE_TEST_IS_DIR)) {
 931                 g_free (saved_dir);
 932                 saved_dir = NULL;
 933         }
 934         if (!g_file_test (default_dir, G_FILE_TEST_IS_DIR)) {
 935                 default_dir = NULL;
 936         }
 937         pics_dir = g_get_user_special_dir (G_USER_DIRECTORY_PICTURES);
 938         if (pics_dir && !g_file_test (pics_dir, G_FILE_TEST_IS_DIR)) {
 939                 pics_dir = NULL;
 940         }
 941
 942         /* Set current dir to the last one or to DEFAULT_DIR or to home */
 943         if (saved_dir) {
 944                 gtk_file_chooser_set_current_folder (chooser_dialog, saved_dir);
 945         }
 946         else if (pics_dir) {
 947                 gtk_file_chooser_set_current_folder (chooser_dialog, pics_dir);
 948         }
 949         else if (default_dir) {
 950                 gtk_file_chooser_set_current_folder (chooser_dialog, default_dir);
 951         } else {
 952                 gtk_file_chooser_set_current_folder (chooser_dialog, g_get_home_dir ());
 953         }
 954
 955         /* Add shortcuts to special dirs */
 956         if (saved_dir) {
 957                 gtk_file_chooser_add_shortcut_folder (chooser_dialog, saved_dir, NULL);
 958         }
 959         else if (pics_dir) {
 960                 gtk_file_chooser_add_shortcut_folder (chooser_dialog, pics_dir, NULL);
 961         }
 962         if (default_dir) {
 963                 gtk_file_chooser_add_shortcut_folder (chooser_dialog, default_dir, NULL);
 964         }
 965
 966         /* Setup preview image */
 967         image = gtk_image_new ();
 968         gtk_file_chooser_set_preview_widget (chooser_dialog, image);
 969         gtk_widget_set_size_request (image, AVATAR_SIZE_SAVE, AVATAR_SIZE_SAVE);
 970         gtk_widget_show (image);
 971         gtk_file_chooser_set_use_preview_label (chooser_dialog, FALSE);
 972         g_signal_connect (chooser_dialog, "update-preview",
 973                           G_CALLBACK (avatar_chooser_update_preview_cb),
 974                           chooser);
 975
 976         /* Setup filers */
 977         filter = gtk_file_filter_new ();
 978         gtk_file_filter_set_name (filter, _("Images"));
 979         gtk_file_filter_add_pixbuf_formats (filter);
 980         gtk_file_chooser_add_filter (chooser_dialog, filter);
 981         filter = gtk_file_filter_new ();
 982         gtk_file_filter_set_name (filter, _("All Files"));
 983         gtk_file_filter_add_pattern (filter, "*");
 984         gtk_file_chooser_add_filter (chooser_dialog, filter);
 985
 986         /* Setup response */
 987         gtk_dialog_set_default_response (GTK_DIALOG (chooser_dialog), GTK_RESPONSE_OK);
 988         g_signal_connect (chooser_dialog, "response",
 989                           G_CALLBACK (avatar_chooser_response_cb),
 990                           chooser);
 991
 992         gtk_widget_show (GTK_WIDGET (chooser_dialog));
 993         g_free (saved_dir);
 994 }
 995
 996 /**
 997  * empathy_avatar_chooser_new:
 998  *
 999  * Creates a new #EmpathyAvatarChooser.
1000  *
1001  * Return value: a new #EmpathyAvatarChooser
1002  */
1003 GtkWidget *
1004 empathy_avatar_chooser_new ()
1005 {
1006         return g_object_new (EMPATHY_TYPE_AVATAR_CHOOSER, NULL);
1007 }
1008
1009 /**
1010  * empathy_avatar_chooser_set:
1011  * @chooser: an #EmpathyAvatarChooser
1012  * @avatar: a new #EmpathyAvatar
1013  *
1014  * Sets the @chooser to display the avatar indicated by @avatar.
1015  */
1016 void
1017 empathy_avatar_chooser_set (EmpathyAvatarChooser *chooser,
1018                             EmpathyAvatar        *avatar)
1019 {
1020         g_return_if_fail (EMPATHY_IS_AVATAR_CHOOSER (chooser));
1021
1022         if (avatar != NULL) {
1023                 avatar_chooser_set_image_from_avatar (chooser, avatar, FALSE);
1024         } else {
1025                 avatar_chooser_clear_image (chooser);
1026         }
1027 }
1028
1029 /**
1030  * empathy_avatar_chooser_get_image_data:
1031  * @chooser: an #EmpathyAvatarChooser
1032  * @data: avatar bytes
1033  * @data_size: size of @data
1034  * @mime_type: avatar mime-type
1035  *
1036  * Gets image data about the currently selected avatar.
1037  */
1038 void
1039 empathy_avatar_chooser_get_image_data (EmpathyAvatarChooser  *chooser,
1040                                        const gchar          **data,
1041                                        gsize                 *data_size,
1042                                        const gchar          **mime_type)
1043 {
1044         EmpathyAvatarChooserPriv *priv;
1045
1046         g_return_if_fail (EMPATHY_IS_AVATAR_CHOOSER (chooser));
1047
1048         priv = GET_PRIV (chooser);
1049
1050         if (priv->avatar != NULL) {
1051                 if (data != NULL) {
1052                         *data = priv->avatar->data;
1053                 }
1054                 if (data_size != NULL) {
1055                         *data_size = priv->avatar->len;
1056                 }
1057                 if (mime_type != NULL) {
1058                         *mime_type = priv->avatar->format;
1059                 }
1060         } else {
1061                 if (data != NULL) {
1062                         *data = NULL;
1063                 }
1064                 if (data_size != NULL) {
1065                         *data_size = 0;
1066                 }
1067                 if (mime_type != NULL) {
1068                         *mime_type = NULL;
1069                 }
1070         }
1071 }
1072