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
  34 #include "empathy-avatar-chooser.h"
  35 #include "empathy-conf.h"
  36 #include "empathy-images.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         TpConnection            *connection;
  66         GtkFileChooser          *chooser_dialog;
  67
  68         gulong ready_handler_id;
  69
  70         EmpathyAvatar *avatar;
  71 } EmpathyAvatarChooserPriv;
  72
  73 static void       avatar_chooser_finalize              (GObject              *object);
  74 static void       avatar_chooser_set_connection        (EmpathyAvatarChooser *self,
  75                                                         TpConnection         *connection);
  76 static void       avatar_chooser_set_image             (EmpathyAvatarChooser *chooser,
  77                                                         EmpathyAvatar        *avatar,
  78                                                         GdkPixbuf            *pixbuf,
  79                                                         gboolean              set_locally);
  80 static gboolean   avatar_chooser_drag_motion_cb        (GtkWidget            *widget,
  81                                                         GdkDragContext       *context,
  82                                                         gint                  x,
  83                                                         gint                  y,
  84                                                         guint                 time,
  85                                                         EmpathyAvatarChooser *chooser);
  86 static void       avatar_chooser_drag_leave_cb         (GtkWidget            *widget,
  87                                                         GdkDragContext       *context,
  88                                                         guint                 time,
  89                                                         EmpathyAvatarChooser *chooser);
  90 static gboolean   avatar_chooser_drag_drop_cb          (GtkWidget            *widget,
  91                                                         GdkDragContext       *context,
  92                                                         gint                  x,
  93                                                         gint                  y,
  94                                                         guint                 time,
  95                                                         EmpathyAvatarChooser *chooser);
  96 static void       avatar_chooser_drag_data_received_cb (GtkWidget            *widget,
  97                                                         GdkDragContext       *context,
  98                                                         gint                  x,
  99                                                         gint                  y,
 100                                                         GtkSelectionData     *selection_data,
 101                                                         guint                 info,
 102                                                         guint                 time,
 103                                                         EmpathyAvatarChooser *chooser);
 104 static void       avatar_chooser_clicked_cb            (GtkWidget            *button,
 105                                                         EmpathyAvatarChooser *chooser);
 106
 107 enum {
 108         CHANGED,
 109         LAST_SIGNAL
 110 };
 111
 112 enum {
 113         PROP_0,
 114         PROP_CONNECTION
 115 };
 116
 117 static guint signals [LAST_SIGNAL];
 118
 119 G_DEFINE_TYPE (EmpathyAvatarChooser, empathy_avatar_chooser, GTK_TYPE_BUTTON);
 120
 121 /*
 122  * Drag and drop stuff
 123  */
 124 #define URI_LIST_TYPE "text/uri-list"
 125
 126 enum DndTargetType {
 127         DND_TARGET_TYPE_URI_LIST
 128 };
 129
 130 static const GtkTargetEntry drop_types[] = {
 131         { URI_LIST_TYPE, 0, DND_TARGET_TYPE_URI_LIST },
 132 };
 133
 134 static void
 135 avatar_chooser_get_property (GObject    *object,
 136                              guint       param_id,
 137                              GValue     *value,
 138                              GParamSpec *pspec)
 139 {
 140         EmpathyAvatarChooserPriv *priv = GET_PRIV (object);
 141
 142         switch (param_id) {
 143         case PROP_CONNECTION:
 144                 g_value_set_object (value, priv->connection);
 145                 break;
 146         default:
 147                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 148                 break;
 149         }
 150 }
 151
 152 static void
 153 avatar_chooser_set_property (GObject      *object,
 154                              guint         param_id,
 155                              const GValue *value,
 156                              GParamSpec   *pspec)
 157 {
 158         EmpathyAvatarChooser *self = EMPATHY_AVATAR_CHOOSER (object);
 159
 160         switch (param_id) {
 161         case PROP_CONNECTION:
 162                 avatar_chooser_set_connection (self, g_value_get_object (value));
 163                 break;
 164         default:
 165                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 166                 break;
 167         }
 168 }
 169
 170 static void
 171 empathy_avatar_chooser_class_init (EmpathyAvatarChooserClass *klass)
 172 {
 173         GObjectClass *object_class = G_OBJECT_CLASS (klass);
 174         GParamSpec *param_spec;
 175
 176         object_class->finalize = avatar_chooser_finalize;
 177         object_class->get_property = avatar_chooser_get_property;
 178         object_class->set_property = avatar_chooser_set_property;
 179
 180         /**
 181          * EmpathyAvatarChooser::changed:
 182          * @chooser: an #EmpathyAvatarChooser
 183          *
 184          * Emitted when the chosen avatar has changed.
 185          *
 186          */
 187         signals[CHANGED] =
 188                 g_signal_new ("changed",
 189                               G_TYPE_FROM_CLASS (klass),
 190                               G_SIGNAL_RUN_LAST,
 191                               0,
 192                               NULL, NULL,
 193                               g_cclosure_marshal_VOID__VOID,
 194                               G_TYPE_NONE, 0);
 195
 196         /**
 197          * EmpathyAvatarChooser:connection:
 198          *
 199          * The #TpConnection whose avatar should be shown and modified by
 200          * the #EmpathyAvatarChooser instance.
 201          */
 202         param_spec = g_param_spec_object ("connection",
 203                                           "TpConnection",
 204                                           "TpConnection whose avatar should be "
 205                                           "shown and modified by this widget",
 206                                           TP_TYPE_CONNECTION,
 207                                           G_PARAM_READWRITE |
 208                                           G_PARAM_STATIC_STRINGS);
 209         g_object_class_install_property (object_class,
 210                                          PROP_CONNECTION,
 211                                          param_spec);
 212
 213         g_type_class_add_private (object_class, sizeof (EmpathyAvatarChooserPriv));
 214 }
 215
 216 static void
 217 empathy_avatar_chooser_init (EmpathyAvatarChooser *chooser)
 218 {
 219         EmpathyAvatarChooserPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (chooser,
 220                 EMPATHY_TYPE_AVATAR_CHOOSER, EmpathyAvatarChooserPriv);
 221
 222         chooser->priv = priv;
 223         gtk_drag_dest_set (GTK_WIDGET (chooser),
 224                            GTK_DEST_DEFAULT_ALL,
 225                            drop_types,
 226                            G_N_ELEMENTS (drop_types),
 227                            GDK_ACTION_COPY);
 228
 229         g_signal_connect (chooser, "drag-motion",
 230                           G_CALLBACK (avatar_chooser_drag_motion_cb),
 231                           chooser);
 232         g_signal_connect (chooser, "drag-leave",
 233                           G_CALLBACK (avatar_chooser_drag_leave_cb),
 234                           chooser);
 235         g_signal_connect (chooser, "drag-drop",
 236                           G_CALLBACK (avatar_chooser_drag_drop_cb),
 237                           chooser);
 238         g_signal_connect (chooser, "drag-data-received",
 239                           G_CALLBACK (avatar_chooser_drag_data_received_cb),
 240                           chooser);
 241         g_signal_connect (chooser, "clicked",
 242                           G_CALLBACK (avatar_chooser_clicked_cb),
 243                           chooser);
 244
 245         empathy_avatar_chooser_set (chooser, NULL);
 246 }
 247
 248 static void
 249 avatar_chooser_finalize (GObject *object)
 250 {
 251         EmpathyAvatarChooserPriv *priv;
 252
 253         priv = GET_PRIV (object);
 254
 255         avatar_chooser_set_connection (EMPATHY_AVATAR_CHOOSER (object), NULL);
 256         g_assert (priv->connection == NULL);
 257
 258         if (priv->avatar != NULL) {
 259                 empathy_avatar_unref (priv->avatar);
 260         }
 261
 262         G_OBJECT_CLASS (empathy_avatar_chooser_parent_class)->finalize (object);
 263 }
 264
 265 static void
 266 avatar_chooser_set_connection (EmpathyAvatarChooser *self,
 267                                TpConnection         *connection)
 268 {
 269         EmpathyAvatarChooserPriv *priv = GET_PRIV (self);
 270
 271         if (priv->connection != NULL) {
 272                 g_object_unref (priv->connection);
 273                 priv->connection = NULL;
 274         }
 275
 276         if (connection != NULL) {
 277                 GQuark features[] = { TP_CONNECTION_FEATURE_AVATAR_REQUIREMENTS, 0 };
 278                 priv->connection = g_object_ref (connection);
 279                 tp_proxy_prepare_async (priv->connection, features, NULL, NULL);
 280         }
 281 }
 282
 283 static void
 284 avatar_chooser_error_show (EmpathyAvatarChooser *chooser,
 285                            const gchar          *primary_text,
 286                            const gchar          *secondary_text)
 287 {
 288         GtkWidget *parent;
 289         GtkWidget *dialog;
 290
 291         parent = gtk_widget_get_toplevel (GTK_WIDGET (chooser));
 292         if (!GTK_IS_WINDOW (parent)) {
 293                 parent = NULL;
 294         }
 295
 296         dialog = gtk_message_dialog_new (parent ? GTK_WINDOW (parent) : NULL,
 297                                          GTK_DIALOG_MODAL,
 298                                          GTK_MESSAGE_WARNING,
 299                                          GTK_BUTTONS_CLOSE,
 300                                          "%s", primary_text);
 301
 302         if (secondary_text != NULL) {
 303                 gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
 304                                                           "%s", secondary_text);
 305         }
 306
 307         g_signal_connect (dialog, "response",
 308                           G_CALLBACK (gtk_widget_destroy), NULL);
 309         gtk_widget_show (dialog);
 310
 311 }
 312
 313 static gboolean
 314 str_in_strv (const gchar  *str,
 315              gchar **strv)
 316 {
 317         if (strv == NULL) {
 318                 return FALSE;
 319         }
 320
 321         while (*strv != NULL) {
 322                 if (g_str_equal (str, *strv)) {
 323                         return TRUE;
 324                 }
 325                 strv++;
 326         }
 327         return FALSE;
 328 }
 329
 330 /* The caller must free the strings stored in satisfactory_format_name and
 331  * satisfactory_mime_type.
 332  */
 333 static gboolean
 334 avatar_chooser_need_mime_type_conversion (const gchar *current_mime_type,
 335                                           gchar      **accepted_mime_types,
 336                                           gchar      **satisfactory_format_name,
 337                                           gchar      **satisfactory_mime_type)
 338 {
 339         gchar   *good_mime_types[] = {"image/jpeg", "image/png", NULL};
 340         guint    i;
 341         GSList  *formats, *l;
 342         gboolean found = FALSE;
 343
 344         *satisfactory_format_name = NULL;
 345         *satisfactory_mime_type = NULL;
 346
 347         /* If there is no accepted format there is nothing we can do */
 348         if (accepted_mime_types == NULL || *accepted_mime_types == NULL) {
 349                 return TRUE;
 350         }
 351
 352         /* If the current mime type is good and accepted, don't change it!
 353          * jpeg is compress better pictures, but png is better for logos and
 354          * could have an alpha layer. */
 355         if (str_in_strv (current_mime_type, good_mime_types) &&
 356             str_in_strv (current_mime_type, accepted_mime_types)) {
 357                 *satisfactory_mime_type = g_strdup (current_mime_type);
 358                 *satisfactory_format_name = g_strdup (current_mime_type +
 359                                                       strlen ("image/"));
 360                 return FALSE;
 361         }
 362
 363         /* The current mime type is either not accepted or not good to use.
 364          * Check if one of the good format is supported... */
 365         for (i = 0; good_mime_types[i] != NULL;  i++) {
 366                 if (str_in_strv (good_mime_types[i], accepted_mime_types)) {
 367                         *satisfactory_mime_type = g_strdup (good_mime_types[i]);
 368                         *satisfactory_format_name = g_strdup (good_mime_types[i] +
 369                                                               strlen ("image/"));
 370                         return TRUE;
 371                 }
 372         }
 373
 374         /* Pick the first supported format we can write */
 375         formats = gdk_pixbuf_get_formats ();
 376         for (l = formats; !found && l != NULL; l = l->next) {
 377                 GdkPixbufFormat *format = l->data;
 378                 gchar **format_mime_types;
 379                 gchar **iter;
 380
 381                 if (!gdk_pixbuf_format_is_writable (format)) {
 382                         continue;
 383                 }
 384
 385                 format_mime_types = gdk_pixbuf_format_get_mime_types (format);
 386                 for (iter = format_mime_types; *iter != NULL; iter++) {
 387                         if (str_in_strv (*iter, accepted_mime_types)) {
 388                                 *satisfactory_format_name = gdk_pixbuf_format_get_name (format);
 389                                 *satisfactory_mime_type = g_strdup (*iter);
 390                                 found = TRUE;
 391                                 break;
 392                         }
 393                 }
 394                 g_strfreev (format_mime_types);
 395         }
 396         g_slist_free (formats);
 397
 398         return TRUE;
 399 }
 400
 401 static EmpathyAvatar *
 402 avatar_chooser_maybe_convert_and_scale (EmpathyAvatarChooser *chooser,
 403                                         GdkPixbuf            *pixbuf,
 404                                         EmpathyAvatar        *avatar)
 405 {
 406         EmpathyAvatarChooserPriv *priv = GET_PRIV (chooser);
 407         TpAvatarRequirements     *req;
 408         gboolean                  needs_conversion = FALSE;
 409         guint                     width, height;
 410         gchar                    *new_format_name = NULL;
 411         gchar                    *new_mime_type = NULL;
 412         gdouble                   min_factor, max_factor;
 413         gdouble                   factor;
 414         gchar                    *converted_image_data = NULL;
 415         gsize                     converted_image_size = 0;
 416
 417         req = tp_connection_get_avatar_requirements (priv->connection);
 418         if (req == NULL) {
 419                 DEBUG ("Avatar requirements not ready");
 420                 return NULL;
 421         }
 422
 423         /* Smaller is the factor, smaller will be the image.
 424          * 0 is an empty image, 1 is the full size. */
 425         min_factor = 0;
 426         max_factor = 1;
 427         factor = 1;
 428
 429         /* Check if we need to convert to another image format */
 430         if (avatar_chooser_need_mime_type_conversion (avatar->format,
 431                                                       req->supported_mime_types,
 432                                                       &new_format_name,
 433                                                       &new_mime_type)) {
 434                 DEBUG ("Format conversion needed, we'll use mime type '%s' "
 435                        "and format name '%s'. Current mime type is '%s'",
 436                        new_mime_type, new_format_name, avatar->format);
 437                 needs_conversion = TRUE;
 438         }
 439
 440         /* If there is no format we can use, report error to the user. */
 441         if (new_mime_type == NULL || new_format_name == NULL) {
 442                 avatar_chooser_error_show (chooser, _("Couldn't convert image"),
 443                                 _("None of the accepted image formats are "
 444                                   "supported on your system"));
 445                 return NULL;
 446         }
 447
 448         /* If width or height are too big, it needs converting. */
 449         width = gdk_pixbuf_get_width (pixbuf);
 450         height = gdk_pixbuf_get_height (pixbuf);
 451         if ((req->maximum_width > 0 && width > req->maximum_width) ||
 452             (req->maximum_height > 0 && height > req->maximum_height)) {
 453                 gdouble h_factor, v_factor;
 454
 455                 h_factor = (gdouble) req->maximum_width / width;
 456                 v_factor = (gdouble) req->maximum_height / height;
 457                 factor = max_factor = MIN (h_factor, v_factor);
 458
 459                 DEBUG ("Image dimensions (%dx%d) are too big. Max is %dx%d.",
 460                        width, height, req->maximum_width, req->maximum_height);
 461
 462                 needs_conversion = TRUE;
 463         }
 464
 465         /* If the data len is too big and no other conversion is needed,
 466          * try with a lower factor. */
 467         if (req->maximum_bytes > 0 && avatar->len > req->maximum_bytes && !needs_conversion) {
 468                 DEBUG ("Image data (%"G_GSIZE_FORMAT" bytes) is too big "
 469                        "(max is %u bytes), conversion needed.",
 470                        avatar->len, req->maximum_bytes);
 471
 472                 factor = 0.5;
 473                 needs_conversion = TRUE;
 474         }
 475
 476         /* If no conversion is needed, return the avatar */
 477         if (!needs_conversion) {
 478                 g_free (new_format_name);
 479                 g_free (new_mime_type);
 480                 return empathy_avatar_ref (avatar);
 481         }
 482
 483         do {
 484                 GdkPixbuf *pixbuf_scaled = NULL;
 485                 gboolean   saved;
 486                 gint       new_width, new_height;
 487                 GError    *error = NULL;
 488
 489                 g_free (converted_image_data);
 490
 491                 if (factor != 1) {
 492                         new_width = width * factor;
 493                         new_height = height * factor;
 494                         pixbuf_scaled = gdk_pixbuf_scale_simple (pixbuf,
 495                                                                  new_width,
 496                                                                  new_height,
 497                                                                  GDK_INTERP_HYPER);
 498                 } else {
 499                         new_width = width;
 500                         new_height = height;
 501                         pixbuf_scaled = g_object_ref (pixbuf);
 502                 }
 503
 504                 DEBUG ("Trying with factor %f (%dx%d) and format %s...", factor,
 505                         new_width, new_height, new_format_name);
 506
 507                 saved = gdk_pixbuf_save_to_buffer (pixbuf_scaled,
 508                                                    &converted_image_data,
 509                                                    &converted_image_size,
 510                                                    new_format_name,
 511                                                    &error, NULL);
 512                 g_object_unref (pixbuf_scaled);
 513
 514                 if (!saved) {
 515                         g_free (new_format_name);
 516                         g_free (new_mime_type);
 517                         avatar_chooser_error_show (chooser,
 518                                 _("Couldn't convert image"),
 519                                 error ? error->message : NULL);
 520                         g_clear_error (&error);
 521                         return NULL;
 522                 }
 523
 524                 DEBUG ("Produced an image data of %"G_GSIZE_FORMAT" bytes.",
 525                         converted_image_size);
 526
 527                 if (req->maximum_bytes == 0)
 528                         break;
 529
 530                 /* Make a binary search for the bigest factor that produce
 531                  * an image data size less than max_size */
 532                 if (converted_image_size > req->maximum_bytes)
 533                         max_factor = factor;
 534                 if (converted_image_size < req->maximum_bytes)
 535                         min_factor = factor;
 536                 factor = (min_factor + max_factor)/2;
 537
 538                 /* We are done if either:
 539                  * - min_factor == max_factor. That happens if we resized to
 540                  *   the max required dimension and the produced data size is
 541                  *   less than max_size.
 542                  * - The data size is close enough to max_size. Here we accept
 543                  *   a difference of 1k.
 544                  */
 545         } while (min_factor != max_factor &&
 546                  abs (req->maximum_bytes - converted_image_size) > 1024);
 547         g_free (new_format_name);
 548
 549         /* Takes ownership of new_mime_type and converted_image_data */
 550         avatar = empathy_avatar_new ((guchar *) converted_image_data,
 551                 converted_image_size, new_mime_type, NULL, NULL);
 552
 553         return avatar;
 554 }
 555
 556 static void
 557 avatar_chooser_clear_image (EmpathyAvatarChooser *chooser)
 558 {
 559         EmpathyAvatarChooserPriv *priv = GET_PRIV (chooser);
 560         GtkWidget *image;
 561
 562         if (priv->avatar != NULL) {
 563                 empathy_avatar_unref (priv->avatar);
 564                 priv->avatar = NULL;
 565         }
 566
 567         image = gtk_image_new_from_icon_name (EMPATHY_IMAGE_AVATAR_DEFAULT,
 568                 GTK_ICON_SIZE_DIALOG);
 569         gtk_button_set_image (GTK_BUTTON (chooser), image);
 570         g_signal_emit (chooser, signals[CHANGED], 0);
 571 }
 572
 573 static void
 574 avatar_chooser_set_image_from_data (EmpathyAvatarChooser *chooser,
 575                                     gchar                *data,
 576                                     gsize                 size,
 577                                     gboolean              set_locally)
 578 {
 579         GdkPixbuf     *pixbuf;
 580         EmpathyAvatar *avatar = NULL;
 581         gchar         *mime_type = NULL;
 582
 583         if (data == NULL) {
 584                 avatar_chooser_clear_image (chooser);
 585                 return;
 586         }
 587
 588         pixbuf = empathy_pixbuf_from_data_and_mime (data, size, &mime_type);
 589         if (pixbuf == NULL) {
 590                 g_free (data);
 591                 data = NULL;
 592                 return;
 593         }
 594
 595         /* avatar takes ownership of data and mime_type */
 596         avatar = empathy_avatar_new ((guchar *) data, size, mime_type, NULL, NULL);
 597
 598         avatar_chooser_set_image (chooser, avatar, pixbuf, set_locally);
 599 }
 600
 601 static void
 602 avatar_chooser_set_image_from_avatar (EmpathyAvatarChooser *chooser,
 603                                       EmpathyAvatar        *avatar,
 604                                       gboolean              set_locally)
 605 {
 606         GdkPixbuf *pixbuf;
 607         gchar     *mime_type = NULL;
 608
 609         g_assert (avatar != NULL);
 610
 611         pixbuf = empathy_pixbuf_from_data_and_mime ((gchar *) avatar->data,
 612                                                     avatar->len,
 613                                                     &mime_type);
 614         if (pixbuf == NULL) {
 615                 DEBUG ("couldn't make a pixbuf from avatar; giving up");
 616                 return;
 617         }
 618
 619         if (avatar->format == NULL) {
 620                 avatar->format = mime_type;
 621         } else {
 622                 if (strcmp (mime_type, avatar->format)) {
 623                         DEBUG ("avatar->format is %s; gdkpixbuf yields %s!",
 624                                 avatar->format, mime_type);
 625                 }
 626                 g_free (mime_type);
 627         }
 628
 629         empathy_avatar_ref (avatar);
 630
 631         avatar_chooser_set_image (chooser, avatar, pixbuf, set_locally);
 632 }
 633
 634 static void
 635 avatar_chooser_set_image (EmpathyAvatarChooser *chooser,
 636                           EmpathyAvatar        *avatar,
 637                           GdkPixbuf            *pixbuf,
 638                           gboolean              set_locally)
 639 {
 640         EmpathyAvatarChooserPriv *priv = GET_PRIV (chooser);
 641         GdkPixbuf                *pixbuf_view;
 642         GtkWidget                *image;
 643
 644         g_assert (avatar != NULL);
 645         g_assert (pixbuf != NULL);
 646
 647         if (set_locally) {
 648                 EmpathyAvatar *conv;
 649
 650                 conv = avatar_chooser_maybe_convert_and_scale (chooser,
 651                         pixbuf, avatar);
 652                 empathy_avatar_unref (avatar);
 653
 654                 if (conv == NULL) {
 655                         /* An error occured; don't change the avatar. */
 656                         return;
 657                 }
 658
 659                 avatar = conv;
 660         }
 661
 662         if (priv->avatar != NULL) {
 663                 empathy_avatar_unref (priv->avatar);
 664         }
 665         priv->avatar = avatar;
 666
 667         pixbuf_view = empathy_pixbuf_scale_down_if_necessary (pixbuf, AVATAR_SIZE_VIEW);
 668         image = gtk_image_new_from_pixbuf (pixbuf_view);
 669
 670         gtk_button_set_image (GTK_BUTTON (chooser), image);
 671         g_signal_emit (chooser, signals[CHANGED], 0);
 672
 673         g_object_unref (pixbuf_view);
 674         g_object_unref (pixbuf);
 675 }
 676
 677 static void
 678 avatar_chooser_set_image_from_file (EmpathyAvatarChooser *chooser,
 679                                     const gchar          *filename)
 680 {
 681         gchar  *image_data = NULL;
 682         gsize   image_size = 0;
 683         GError *error = NULL;
 684
 685         if (!g_file_get_contents (filename, &image_data, &image_size, &error)) {
 686                 DEBUG ("Failed to load image from '%s': %s", filename,
 687                         error ? error->message : "No error given");
 688
 689                 g_clear_error (&error);
 690                 return;
 691         }
 692
 693         avatar_chooser_set_image_from_data (chooser, image_data, image_size, TRUE);
 694 }
 695
 696 static gboolean
 697 avatar_chooser_drag_motion_cb (GtkWidget          *widget,
 698                               GdkDragContext     *context,
 699                               gint                x,
 700                               gint                y,
 701                               guint               time_,
 702                               EmpathyAvatarChooser *chooser)
 703 {
 704         EmpathyAvatarChooserPriv *priv;
 705         GList                  *p;
 706
 707         priv = GET_PRIV (chooser);
 708
 709         for (p = context->targets; p != NULL; p = p->next) {
 710                 gchar *possible_type;
 711
 712                 possible_type = gdk_atom_name (GDK_POINTER_TO_ATOM (p->data));
 713
 714                 if (!strcmp (possible_type, URI_LIST_TYPE)) {
 715                         g_free (possible_type);
 716                         gdk_drag_status (context, GDK_ACTION_COPY, time_);
 717
 718                         return TRUE;
 719                 }
 720
 721                 g_free (possible_type);
 722         }
 723
 724         return FALSE;
 725 }
 726
 727 static void
 728 avatar_chooser_drag_leave_cb (GtkWidget          *widget,
 729                              GdkDragContext     *context,
 730                              guint               time_,
 731                              EmpathyAvatarChooser *chooser)
 732 {
 733 }
 734
 735 static gboolean
 736 avatar_chooser_drag_drop_cb (GtkWidget          *widget,
 737                             GdkDragContext     *context,
 738                             gint                x,
 739                             gint                y,
 740                             guint               time_,
 741                             EmpathyAvatarChooser *chooser)
 742 {
 743         EmpathyAvatarChooserPriv *priv;
 744         GList                  *p;
 745
 746         priv = GET_PRIV (chooser);
 747
 748         if (context->targets == NULL) {
 749                 return FALSE;
 750         }
 751
 752         for (p = context->targets; p != NULL; p = p->next) {
 753                 char *possible_type;
 754
 755                 possible_type = gdk_atom_name (GDK_POINTER_TO_ATOM (p->data));
 756                 if (!strcmp (possible_type, URI_LIST_TYPE)) {
 757                         g_free (possible_type);
 758                         gtk_drag_get_data (widget, context,
 759                                            GDK_POINTER_TO_ATOM (p->data),
 760                                            time_);
 761
 762                         return TRUE;
 763                 }
 764
 765                 g_free (possible_type);
 766         }
 767
 768         return FALSE;
 769 }
 770
 771 static void
 772 avatar_chooser_drag_data_received_cb (GtkWidget          *widget,
 773                                      GdkDragContext     *context,
 774                                      gint                x,
 775                                      gint                y,
 776                                      GtkSelectionData   *selection_data,
 777                                      guint               info,
 778                                      guint               time_,
 779                                      EmpathyAvatarChooser *chooser)
 780 {
 781         gchar    *target_type;
 782         gboolean  handled = FALSE;
 783
 784         target_type = gdk_atom_name (gtk_selection_data_get_target (selection_data));
 785         if (!strcmp (target_type, URI_LIST_TYPE)) {
 786                 GFile            *file;
 787                 gchar            *nl;
 788                 gchar            *data = NULL;
 789                 gsize             bytes_read;
 790
 791                 nl = strstr ((gchar *) gtk_selection_data_get_data (selection_data),
 792                                                 "\r\n");
 793                 if (nl) {
 794                         gchar *uri;
 795
 796                         uri = g_strndup ((gchar *) gtk_selection_data_get_data (selection_data),
 797                                          nl - (gchar *) gtk_selection_data_get_data (selection_data));
 798
 799                         file = g_file_new_for_uri (uri);
 800                         g_free (uri);
 801                 } else {
 802                         file = g_file_new_for_uri ((gchar *) gtk_selection_data_get_data (
 803                                                 selection_data));
 804                 }
 805
 806                 handled = g_file_load_contents (file, NULL, &data, &bytes_read,
 807                                                 NULL, NULL);
 808
 809                 if (handled) {
 810                         /* this in turn calls empathy_avatar_new (), which assumes
 811                          * ownership of data.
 812                          */
 813                         avatar_chooser_set_image_from_data (chooser, data,
 814                                                             bytes_read,
 815                                                             TRUE);
 816                 }
 817
 818                 g_object_unref (file);
 819         }
 820
 821         gtk_drag_finish (context, handled, FALSE, time_);
 822 }
 823
 824 static void
 825 avatar_chooser_update_preview_cb (GtkFileChooser       *file_chooser,
 826                                   EmpathyAvatarChooser *chooser)
 827 {
 828         gchar *filename;
 829
 830         filename = gtk_file_chooser_get_preview_filename (file_chooser);
 831
 832         if (filename) {
 833                 GtkWidget *image;
 834                 GdkPixbuf *pixbuf = NULL;
 835                 GdkPixbuf *scaled_pixbuf;
 836
 837                 pixbuf = gdk_pixbuf_new_from_file (filename, NULL);
 838
 839                 image = gtk_file_chooser_get_preview_widget (file_chooser);
 840
 841                 if (pixbuf) {
 842                         scaled_pixbuf = empathy_pixbuf_scale_down_if_necessary (pixbuf, AVATAR_SIZE_SAVE);
 843                         gtk_image_set_from_pixbuf (GTK_IMAGE (image), scaled_pixbuf);
 844                         g_object_unref (scaled_pixbuf);
 845                         g_object_unref (pixbuf);
 846                 } else {
 847                         gtk_image_set_from_stock (GTK_IMAGE (image),
 848                                                   "gtk-dialog-question",
 849                                                   GTK_ICON_SIZE_DIALOG);
 850                 }
 851
 852                 g_free (filename);
 853         }
 854
 855         gtk_file_chooser_set_preview_widget_active (file_chooser, TRUE);
 856 }
 857
 858 static void
 859 avatar_chooser_response_cb (GtkWidget            *widget,
 860                             gint                  response,
 861                             EmpathyAvatarChooser *chooser)
 862 {
 863         EmpathyAvatarChooserPriv *priv = GET_PRIV (chooser);
 864
 865         priv->chooser_dialog = NULL;
 866
 867         if (response == GTK_RESPONSE_OK) {
 868                 gchar *filename;
 869                 gchar *path;
 870
 871                 filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (widget));
 872                 avatar_chooser_set_image_from_file (chooser, filename);
 873                 g_free (filename);
 874
 875                 path = gtk_file_chooser_get_current_folder (GTK_FILE_CHOOSER (widget));
 876                 if (path) {
 877                         empathy_conf_set_string (empathy_conf_get (),
 878                                                  EMPATHY_PREFS_UI_AVATAR_DIRECTORY,
 879                                                  path);
 880                         g_free (path);
 881                 }
 882         }
 883         else if (response == GTK_RESPONSE_NO) {
 884                 /* This corresponds to "No Image", not to "Cancel" */
 885                 avatar_chooser_clear_image (chooser);
 886         }
 887
 888         gtk_widget_destroy (widget);
 889 }
 890
 891 static void
 892 avatar_chooser_clicked_cb (GtkWidget            *button,
 893                            EmpathyAvatarChooser *chooser)
 894 {
 895         GtkFileChooser *chooser_dialog;
 896         GtkWidget      *image;
 897         gchar          *saved_dir = NULL;
 898         const gchar    *default_dir = DEFAULT_DIR;
 899         const gchar    *pics_dir;
 900         GtkFileFilter  *filter;
 901         EmpathyAvatarChooserPriv *priv = GET_PRIV (chooser);
 902
 903         if (priv->chooser_dialog) {
 904                 gtk_window_present (GTK_WINDOW (priv->chooser_dialog));
 905                 return;
 906         }
 907
 908         priv->chooser_dialog = GTK_FILE_CHOOSER (
 909                 gtk_file_chooser_dialog_new (_("Select Your Avatar Image"),
 910                                              empathy_get_toplevel_window (GTK_WIDGET (chooser)),
 911                                              GTK_FILE_CHOOSER_ACTION_OPEN,
 912                                              _("No Image"),
 913                                              GTK_RESPONSE_NO,
 914                                              GTK_STOCK_CANCEL,
 915                                              GTK_RESPONSE_CANCEL,
 916                                              GTK_STOCK_OPEN,
 917                                              GTK_RESPONSE_OK,
 918                                              NULL));
 919         chooser_dialog = priv->chooser_dialog;
 920         gtk_window_set_destroy_with_parent (GTK_WINDOW (chooser_dialog), TRUE);
 921
 922         /* Get special dirs */
 923         empathy_conf_get_string (empathy_conf_get (),
 924                                  EMPATHY_PREFS_UI_AVATAR_DIRECTORY,
 925                                  &saved_dir);
 926         if (saved_dir && !g_file_test (saved_dir, G_FILE_TEST_IS_DIR)) {
 927                 g_free (saved_dir);
 928                 saved_dir = NULL;
 929         }
 930         if (!g_file_test (default_dir, G_FILE_TEST_IS_DIR)) {
 931                 default_dir = NULL;
 932         }
 933         pics_dir = g_get_user_special_dir (G_USER_DIRECTORY_PICTURES);
 934         if (pics_dir && !g_file_test (pics_dir, G_FILE_TEST_IS_DIR)) {
 935                 pics_dir = NULL;
 936         }
 937
 938         /* Set current dir to the last one or to DEFAULT_DIR or to home */
 939         if (saved_dir) {
 940                 gtk_file_chooser_set_current_folder (chooser_dialog, saved_dir);
 941         }
 942         else if (pics_dir) {
 943                 gtk_file_chooser_set_current_folder (chooser_dialog, pics_dir);
 944         }
 945         else if (default_dir) {
 946                 gtk_file_chooser_set_current_folder (chooser_dialog, default_dir);
 947         } else {
 948                 gtk_file_chooser_set_current_folder (chooser_dialog, g_get_home_dir ());
 949         }
 950
 951         /* Add shortcuts to special dirs */
 952         if (saved_dir) {
 953                 gtk_file_chooser_add_shortcut_folder (chooser_dialog, saved_dir, NULL);
 954         }
 955         else if (pics_dir) {
 956                 gtk_file_chooser_add_shortcut_folder (chooser_dialog, pics_dir, NULL);
 957         }
 958         if (default_dir) {
 959                 gtk_file_chooser_add_shortcut_folder (chooser_dialog, default_dir, NULL);
 960         }
 961
 962         /* Setup preview image */
 963         image = gtk_image_new ();
 964         gtk_file_chooser_set_preview_widget (chooser_dialog, image);
 965         gtk_widget_set_size_request (image, AVATAR_SIZE_SAVE, AVATAR_SIZE_SAVE);
 966         gtk_widget_show (image);
 967         gtk_file_chooser_set_use_preview_label (chooser_dialog, FALSE);
 968         g_signal_connect (chooser_dialog, "update-preview",
 969                           G_CALLBACK (avatar_chooser_update_preview_cb),
 970                           chooser);
 971
 972         /* Setup filers */
 973         filter = gtk_file_filter_new ();
 974         gtk_file_filter_set_name (filter, _("Images"));
 975         gtk_file_filter_add_pixbuf_formats (filter);
 976         gtk_file_chooser_add_filter (chooser_dialog, filter);
 977         filter = gtk_file_filter_new ();
 978         gtk_file_filter_set_name (filter, _("All Files"));
 979         gtk_file_filter_add_pattern (filter, "*");
 980         gtk_file_chooser_add_filter (chooser_dialog, filter);
 981
 982         /* Setup response */
 983         gtk_dialog_set_default_response (GTK_DIALOG (chooser_dialog), GTK_RESPONSE_OK);
 984         g_signal_connect (chooser_dialog, "response",
 985                           G_CALLBACK (avatar_chooser_response_cb),
 986                           chooser);
 987
 988         gtk_widget_show (GTK_WIDGET (chooser_dialog));
 989         g_free (saved_dir);
 990 }
 991
 992 /**
 993  * empathy_avatar_chooser_new:
 994  *
 995  * Creates a new #EmpathyAvatarChooser.
 996  *
 997  * Return value: a new #EmpathyAvatarChooser
 998  */
 999 GtkWidget *
1000 empathy_avatar_chooser_new ()
1001 {
1002         return g_object_new (EMPATHY_TYPE_AVATAR_CHOOSER, NULL);
1003 }
1004
1005 /**
1006  * empathy_avatar_chooser_set:
1007  * @chooser: an #EmpathyAvatarChooser
1008  * @avatar: a new #EmpathyAvatar
1009  *
1010  * Sets the @chooser to display the avatar indicated by @avatar.
1011  */
1012 void
1013 empathy_avatar_chooser_set (EmpathyAvatarChooser *chooser,
1014                             EmpathyAvatar        *avatar)
1015 {
1016         g_return_if_fail (EMPATHY_IS_AVATAR_CHOOSER (chooser));
1017
1018         if (avatar != NULL) {
1019                 avatar_chooser_set_image_from_avatar (chooser, avatar, FALSE);
1020         } else {
1021                 avatar_chooser_clear_image (chooser);
1022         }
1023 }
1024
1025 /**
1026  * empathy_avatar_chooser_get_image_data:
1027  * @chooser: an #EmpathyAvatarChooser
1028  * @data: avatar bytes
1029  * @data_size: size of @data
1030  * @mime_type: avatar mime-type
1031  *
1032  * Gets image data about the currently selected avatar.
1033  */
1034 void
1035 empathy_avatar_chooser_get_image_data (EmpathyAvatarChooser  *chooser,
1036                                        const gchar          **data,
1037                                        gsize                 *data_size,
1038                                        const gchar          **mime_type)
1039 {
1040         EmpathyAvatarChooserPriv *priv;
1041
1042         g_return_if_fail (EMPATHY_IS_AVATAR_CHOOSER (chooser));
1043
1044         priv = GET_PRIV (chooser);
1045
1046         if (priv->avatar != NULL) {
1047                 if (data != NULL) {
1048                         *data = (gchar *) priv->avatar->data;
1049                 }
1050                 if (data_size != NULL) {
1051                         *data_size = priv->avatar->len;
1052                 }
1053                 if (mime_type != NULL) {
1054                         *mime_type = priv->avatar->format;
1055                 }
1056         } else {
1057                 if (data != NULL) {
1058                         *data = NULL;
1059                 }
1060                 if (data_size != NULL) {
1061                         *data_size = 0;
1062                 }
1063                 if (mime_type != NULL) {
1064                         *mime_type = NULL;
1065                 }
1066         }
1067 }
1068
1069 void
1070 empathy_avatar_chooser_set_account (EmpathyAvatarChooser *self,
1071                                        TpAccount *account)
1072 {
1073         g_return_if_fail (account != NULL);
1074
1075         avatar_chooser_set_connection (self, tp_account_get_connection (account));
1076         g_object_notify (G_OBJECT (self), "connection");
1077 }