git.maemo.org Git - modest/blob - src/widgets/modest-folder-view.c

   1 /* Copyright (c) 2006, Nokia Corporation
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  *   notice, this list of conditions and the following disclaimer.
  10  * * Redistributions in binary form must reproduce the above copyright
  11  *   notice, this list of conditions and the following disclaimer in the
  12  *   documentation and/or other materials provided with the distribution.
  13  * * Neither the name of the Nokia Corporation nor the names of its
  14  *   contributors may be used to endorse or promote products derived from
  15  *   this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  18  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  20  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  21  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <glib/gi18n.h>
  31 #include <string.h>
  32
  33 #include <tny-account-store-view.h>
  34 #include <tny-gtk-account-list-model.h>
  35 #include <tny-gtk-folder-store-tree-model.h>
  36 #include <tny-gtk-header-list-model.h>
  37 #include <tny-folder.h>
  38 #include <tny-folder-monitor.h>
  39 #include <tny-account-store.h>
  40 #include <tny-account.h>
  41 #include <tny-folder.h>
  42 #include <tny-camel-folder.h>
  43 #include <tny-simple-list.h>
  44 #include <modest-tny-folder.h>
  45 #include <modest-marshal.h>
  46 #include <modest-icon-names.h>
  47 #include <modest-tny-account-store.h>
  48 #include <modest-text-utils.h>
  49 #include <modest-runtime.h>
  50 #include "modest-folder-view.h"
  51 #include <modest-dnd.h>
  52
  53 /* 'private'/'protected' functions */
  54 static void modest_folder_view_class_init  (ModestFolderViewClass *klass);
  55 static void modest_folder_view_init        (ModestFolderView *obj);
  56 static void modest_folder_view_finalize    (GObject *obj);
  57
  58 static void         tny_account_store_view_init (gpointer g,
  59                                                  gpointer iface_data);
  60
  61 static void         modest_folder_view_set_account_store (TnyAccountStoreView *self,
  62                                                           TnyAccountStore     *account_store);
  63
  64 static gboolean     update_model           (ModestFolderView *self,
  65                                             ModestTnyAccountStore *account_store);
  66
  67 static gboolean     update_model_empty     (ModestFolderView *self);
  68
  69 static void         on_selection_changed   (GtkTreeSelection *sel, gpointer data);
  70
  71 static void         on_account_update      (TnyAccountStore *account_store,
  72                                             const gchar *account,
  73                                             gpointer user_data);
  74
  75 static void         on_accounts_reloaded   (TnyAccountStore *store,
  76                                             gpointer user_data);
  77
  78 static gint         cmp_rows               (GtkTreeModel *tree_model,
  79                                             GtkTreeIter *iter1,
  80                                             GtkTreeIter *iter2,
  81                                             gpointer user_data);
  82
  83 /* DnD functions */
  84 static void         on_drag_data_get       (GtkWidget *widget,
  85                                             GdkDragContext *context,
  86                                             GtkSelectionData *selection_data,
  87                                             guint info,
  88                                             guint time,
  89                                             gpointer data);
  90
  91 static void         on_drag_data_received  (GtkWidget *widget,
  92                                             GdkDragContext *context,
  93                                             gint x,
  94                                             gint y,
  95                                             GtkSelectionData *selection_data,
  96                                             guint info,
  97                                             guint time,
  98                                             gpointer data);
  99
 100 static gboolean     on_drag_motion         (GtkWidget      *widget,
 101                                             GdkDragContext *context,
 102                                             gint            x,
 103                                             gint            y,
 104                                             guint           time,
 105                                             gpointer        user_data);
 106
 107 static gint         expand_row_timeout     (gpointer data);
 108
 109 static void         setup_drag_and_drop    (GtkTreeView *self);
 110
 111 enum {
 112         FOLDER_SELECTION_CHANGED_SIGNAL,
 113         LAST_SIGNAL
 114 };
 115
 116 typedef struct _ModestFolderViewPrivate ModestFolderViewPrivate;
 117 struct _ModestFolderViewPrivate {
 118         TnyAccountStore     *account_store;
 119         TnyFolder           *cur_folder;
 120         GtkTreeRowReference *cur_row;
 121
 122         gulong               account_update_signal;
 123         gulong               changed_signal;
 124         gulong               accounts_reloaded_signal;
 125         GMutex              *lock;
 126
 127         GtkTreeSelection    *cur_selection;
 128         TnyFolderStoreQuery *query;
 129         guint                timer_expander;
 130
 131         TnyFolderMonitor    *monitor;
 132 };
 133 #define MODEST_FOLDER_VIEW_GET_PRIVATE(o)                       \
 134         (G_TYPE_INSTANCE_GET_PRIVATE((o),                       \
 135                                      MODEST_TYPE_FOLDER_VIEW,   \
 136                                      ModestFolderViewPrivate))
 137 /* globals */
 138 static GObjectClass *parent_class = NULL;
 139
 140 static guint signals[LAST_SIGNAL] = {0};
 141
 142 GType
 143 modest_folder_view_get_type (void)
 144 {
 145         static GType my_type = 0;
 146         if (!my_type) {
 147                 static const GTypeInfo my_info = {
 148                         sizeof(ModestFolderViewClass),
 149                         NULL,           /* base init */
 150                         NULL,           /* base finalize */
 151                         (GClassInitFunc) modest_folder_view_class_init,
 152                         NULL,           /* class finalize */
 153                         NULL,           /* class data */
 154                         sizeof(ModestFolderView),
 155                         1,              /* n_preallocs */
 156                         (GInstanceInitFunc) modest_folder_view_init,
 157                         NULL
 158                 };
 159
 160                 static const GInterfaceInfo tny_account_store_view_info = {
 161                         (GInterfaceInitFunc) tny_account_store_view_init, /* interface_init */
 162                         NULL,         /* interface_finalize */
 163                         NULL          /* interface_data */
 164                 };
 165
 166
 167                 my_type = g_type_register_static (GTK_TYPE_TREE_VIEW,
 168                                                   "ModestFolderView",
 169                                                   &my_info, 0);
 170
 171                 g_type_add_interface_static (my_type,
 172                                              TNY_TYPE_ACCOUNT_STORE_VIEW,
 173                                              &tny_account_store_view_info);
 174         }
 175         return my_type;
 176 }
 177
 178 static void
 179 modest_folder_view_class_init (ModestFolderViewClass *klass)
 180 {
 181         GObjectClass *gobject_class;
 182         gobject_class = (GObjectClass*) klass;
 183
 184         parent_class            = g_type_class_peek_parent (klass);
 185         gobject_class->finalize = modest_folder_view_finalize;
 186
 187         g_type_class_add_private (gobject_class,
 188                                   sizeof(ModestFolderViewPrivate));
 189
 190         signals[FOLDER_SELECTION_CHANGED_SIGNAL] =
 191                 g_signal_new ("folder_selection_changed",
 192                               G_TYPE_FROM_CLASS (gobject_class),
 193                               G_SIGNAL_RUN_FIRST,
 194                               G_STRUCT_OFFSET (ModestFolderViewClass,
 195                                                folder_selection_changed),
 196                               NULL, NULL,
 197                               modest_marshal_VOID__POINTER_BOOLEAN,
 198                               G_TYPE_NONE, 2, G_TYPE_POINTER, G_TYPE_BOOLEAN);
 199 }
 200
 201
 202
 203 static void
 204 text_cell_data  (GtkTreeViewColumn *column,  GtkCellRenderer *renderer,
 205                  GtkTreeModel *tree_model,  GtkTreeIter *iter,  gpointer data)
 206 {
 207         GObject *rendobj;
 208         gchar *fname = NULL;
 209         gint unread;
 210         TnyFolderType type;
 211         TnyFolder *folder = NULL;
 212
 213         g_return_if_fail (column);
 214         g_return_if_fail (tree_model);
 215
 216         gtk_tree_model_get (tree_model, iter,
 217                             TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &fname,
 218                             TNY_GTK_FOLDER_STORE_TREE_MODEL_UNREAD_COLUMN, &unread,
 219                             TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
 220                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder,
 221                             -1);
 222         rendobj = G_OBJECT(renderer);
 223
 224         if (!fname)
 225                 return;
 226
 227         if (folder && type != TNY_FOLDER_TYPE_ROOT) { /* FIXME: tnymail bug? crashes with root folders */
 228                 if (modest_tny_folder_is_local_folder (folder)) {
 229                         TnyFolderType type;
 230                         type = modest_tny_folder_get_local_folder_type (folder);
 231                         if (type != TNY_FOLDER_TYPE_UNKNOWN) {
 232                                 g_free (fname);
 233                                 fname = g_strdup(modest_local_folder_info_get_type_display_name (type));
 234                         }
 235                 }
 236         } else if (folder && type == TNY_FOLDER_TYPE_ROOT) {
 237                 g_warning ("fname: %s", fname);
 238                 /* FIXME: todo */
 239         }
 240
 241         if (unread > 0) {
 242                 gchar *folder_title = g_strdup_printf ("%s (%d)", fname, unread);
 243                 g_object_set (rendobj,"text", folder_title,  "weight", 800, NULL);
 244                 g_free (folder_title);
 245         } else
 246                 g_object_set (rendobj,"text", fname, "weight", 400, NULL);
 247
 248         g_free (fname);
 249         if (folder) g_object_unref (G_OBJECT (folder));
 250 }
 251
 252
 253 static GdkPixbuf*
 254 get_cached_icon (const gchar *name)
 255 {
 256         GError *err = NULL;
 257         gpointer pixbuf;
 258         gpointer orig_key;
 259         static GHashTable *icon_cache = NULL;
 260
 261         g_return_val_if_fail (name, NULL);
 262
 263         if (G_UNLIKELY(!icon_cache))
 264                 icon_cache = modest_cache_mgr_get_cache (modest_runtime_get_cache_mgr(),
 265                                                          MODEST_CACHE_MGR_CACHE_TYPE_PIXBUF);
 266
 267         if (!icon_cache || !g_hash_table_lookup_extended (icon_cache, name, &orig_key, &pixbuf)) {
 268                 pixbuf = (gpointer)gdk_pixbuf_new_from_file (name, &err);
 269                 if (!pixbuf) {
 270                         g_printerr ("modest: error in icon factory while loading '%s': %s\n",
 271                                     name, err->message);
 272                         g_error_free (err);
 273                 }
 274                 /* if we cannot find it, we still insert (if we have a cache), so we get the error
 275                  * only once */
 276                 if (icon_cache)
 277                         g_hash_table_insert (icon_cache, g_strdup(name),(gpointer)pixbuf);
 278         }
 279         return GDK_PIXBUF(pixbuf);
 280 }
 281
 282
 283 static void
 284 icon_cell_data  (GtkTreeViewColumn *column,  GtkCellRenderer *renderer,
 285                  GtkTreeModel *tree_model,  GtkTreeIter *iter, gpointer data)
 286 {
 287         GObject *rendobj;
 288         GdkPixbuf *pixbuf;
 289         TnyFolderType type;
 290         gchar *fname = NULL;
 291         gint unread;
 292
 293         rendobj = G_OBJECT(renderer);
 294         gtk_tree_model_get (tree_model, iter,
 295                             TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
 296                             TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &fname,
 297                             TNY_GTK_FOLDER_STORE_TREE_MODEL_UNREAD_COLUMN, &unread,
 298                             -1);
 299         rendobj = G_OBJECT(renderer);
 300
 301         if (type == TNY_FOLDER_TYPE_NORMAL || type == TNY_FOLDER_TYPE_UNKNOWN) {
 302                 type = modest_tny_folder_guess_folder_type_from_name (fname);
 303         }
 304         g_free (fname);
 305
 306         switch (type) {
 307         case TNY_FOLDER_TYPE_ROOT:
 308                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_ACCOUNT);
 309                 break;
 310         case TNY_FOLDER_TYPE_INBOX:
 311                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_INBOX);
 312                 break;
 313         case TNY_FOLDER_TYPE_OUTBOX:
 314                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_OUTBOX);
 315                 break;
 316         case TNY_FOLDER_TYPE_JUNK:
 317                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_JUNK);
 318                 break;
 319         case TNY_FOLDER_TYPE_SENT:
 320                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_SENT);
 321                 break;
 322         case TNY_FOLDER_TYPE_TRASH:
 323                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_TRASH);
 324                 break;
 325         case TNY_FOLDER_TYPE_DRAFTS:
 326                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_DRAFTS);
 327                 break;
 328         case TNY_FOLDER_TYPE_NOTES:
 329                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_NOTES);
 330                 break;
 331         case TNY_FOLDER_TYPE_CALENDAR:
 332                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_CALENDAR);
 333                 break;
 334         case TNY_FOLDER_TYPE_CONTACTS:
 335                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_CONTACTS);
 336                 break;
 337         case TNY_FOLDER_TYPE_NORMAL:
 338         default:
 339                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_NORMAL);
 340                 break;
 341         }
 342         g_object_set (rendobj, "pixbuf", pixbuf, NULL);
 343 }
 344
 345 static void
 346 modest_folder_view_init (ModestFolderView *obj)
 347 {
 348         ModestFolderViewPrivate *priv;
 349         GtkTreeViewColumn *column;
 350         GtkCellRenderer *renderer;
 351         GtkTreeSelection *sel;
 352
 353         priv =  MODEST_FOLDER_VIEW_GET_PRIVATE(obj);
 354
 355         priv->timer_expander = 0;
 356         priv->account_store  = NULL;
 357         priv->cur_folder     = NULL;
 358         priv->cur_row        = NULL;
 359         priv->query          = NULL;
 360         priv->monitor        = NULL;
 361
 362         priv->lock           = g_mutex_new ();
 363
 364         column = gtk_tree_view_column_new ();
 365         gtk_tree_view_append_column (GTK_TREE_VIEW(obj),column);
 366
 367         renderer = gtk_cell_renderer_pixbuf_new();
 368         gtk_tree_view_column_pack_start (column, renderer, FALSE);
 369         gtk_tree_view_column_set_cell_data_func(column, renderer,
 370                                                 icon_cell_data, NULL, NULL);
 371
 372         renderer = gtk_cell_renderer_text_new();
 373         gtk_tree_view_column_pack_start (column, renderer, FALSE);
 374         gtk_tree_view_column_set_cell_data_func(column, renderer,
 375                                                 text_cell_data, NULL, NULL);
 376
 377         sel = gtk_tree_view_get_selection (GTK_TREE_VIEW(obj));
 378         gtk_tree_selection_set_mode (sel, GTK_SELECTION_SINGLE);
 379
 380         gtk_tree_view_column_set_spacing (column, 2);
 381         gtk_tree_view_column_set_resizable (column, TRUE);
 382         gtk_tree_view_column_set_fixed_width (column, TRUE);
 383         gtk_tree_view_set_headers_clickable (GTK_TREE_VIEW(obj), FALSE);
 384         gtk_tree_view_set_enable_search     (GTK_TREE_VIEW(obj), FALSE);
 385
 386         setup_drag_and_drop (GTK_TREE_VIEW(obj));
 387 }
 388
 389 static void
 390 tny_account_store_view_init (gpointer g, gpointer iface_data)
 391 {
 392         TnyAccountStoreViewIface *klass = (TnyAccountStoreViewIface *)g;
 393
 394         klass->set_account_store_func = modest_folder_view_set_account_store;
 395
 396         return;
 397 }
 398
 399 static void
 400 modest_folder_view_finalize (GObject *obj)
 401 {
 402         ModestFolderViewPrivate *priv;
 403         GtkTreeSelection    *sel;
 404
 405         g_return_if_fail (obj);
 406
 407         priv =  MODEST_FOLDER_VIEW_GET_PRIVATE(obj);
 408
 409         if (priv->timer_expander != 0) {
 410                 g_source_remove (priv->timer_expander);
 411                 priv->timer_expander = 0;
 412         }
 413
 414         if (priv->account_store) {
 415                 g_signal_handler_disconnect (G_OBJECT(priv->account_store),
 416                                              priv->account_update_signal);
 417                 g_signal_handler_disconnect (G_OBJECT(priv->account_store),
 418                                              priv->accounts_reloaded_signal);
 419                 g_object_unref (G_OBJECT(priv->account_store));
 420                 priv->account_store = NULL;
 421         }
 422
 423         if (priv->lock) {
 424                 g_mutex_free (priv->lock);
 425                 priv->lock = NULL;
 426         }
 427
 428         if (priv->query) {
 429                 g_object_unref (G_OBJECT (priv->query));
 430                 priv->query = NULL;
 431         }
 432
 433         sel = gtk_tree_view_get_selection (GTK_TREE_VIEW(obj));
 434         if (sel)
 435                 g_signal_handler_disconnect (G_OBJECT(sel), priv->changed_signal);
 436
 437         G_OBJECT_CLASS(parent_class)->finalize (obj);
 438 }
 439
 440
 441 static void
 442 modest_folder_view_set_account_store (TnyAccountStoreView *self, TnyAccountStore *account_store)
 443 {
 444         ModestFolderViewPrivate *priv;
 445         TnyDevice *device;
 446
 447         g_return_if_fail (MODEST_IS_FOLDER_VIEW (self));
 448         g_return_if_fail (TNY_IS_ACCOUNT_STORE (account_store));
 449
 450         priv = MODEST_FOLDER_VIEW_GET_PRIVATE (self);
 451         device = tny_account_store_get_device (account_store);
 452
 453         if (G_UNLIKELY (priv->account_store)) {
 454
 455                 if (g_signal_handler_is_connected (G_OBJECT (priv->account_store),
 456                                                    priv->account_update_signal))
 457                         g_signal_handler_disconnect (G_OBJECT (priv->account_store),
 458                                                      priv->account_update_signal);
 459                 if (g_signal_handler_is_connected (G_OBJECT (priv->account_store),
 460                                                    priv->accounts_reloaded_signal))
 461                         g_signal_handler_disconnect (G_OBJECT (priv->account_store),
 462                                                      priv->accounts_reloaded_signal);
 463
 464                 g_object_unref (G_OBJECT (priv->account_store));
 465         }
 466
 467         priv->account_store = g_object_ref (G_OBJECT (account_store));
 468
 469         priv->account_update_signal =
 470                 g_signal_connect (G_OBJECT(account_store), "account_update",
 471                                   G_CALLBACK (on_account_update), self);
 472
 473         priv->accounts_reloaded_signal =
 474                 g_signal_connect (G_OBJECT(account_store), "accounts_reloaded",
 475                                   G_CALLBACK (on_accounts_reloaded), self);
 476
 477         if (!update_model (MODEST_FOLDER_VIEW (self),
 478                            MODEST_TNY_ACCOUNT_STORE (priv->account_store)))
 479                 g_printerr ("modest: failed to update model\n");
 480
 481         g_object_unref (G_OBJECT (device));
 482 }
 483
 484 static void
 485 on_account_update (TnyAccountStore *account_store, const gchar *account,
 486                    gpointer user_data)
 487 {
 488         if (!update_model (MODEST_FOLDER_VIEW(user_data),
 489                            MODEST_TNY_ACCOUNT_STORE(account_store)))
 490                 g_printerr ("modest: failed to update model for changes in '%s'",
 491                             account);
 492 }
 493
 494 static void
 495 on_accounts_reloaded   (TnyAccountStore *account_store,
 496                         gpointer user_data)
 497 {
 498         update_model (MODEST_FOLDER_VIEW (user_data),
 499                       MODEST_TNY_ACCOUNT_STORE(account_store));
 500 }
 501
 502 void
 503 modest_folder_view_set_title (ModestFolderView *self, const gchar *title)
 504 {
 505         GtkTreeViewColumn *col;
 506
 507         g_return_if_fail (self);
 508
 509         col = gtk_tree_view_get_column (GTK_TREE_VIEW(self), 0);
 510         if (!col) {
 511                 g_printerr ("modest: failed get column for title\n");
 512                 return;
 513         }
 514
 515         gtk_tree_view_column_set_title (col, title);
 516         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW(self),
 517                                            title != NULL);
 518 }
 519
 520 GtkWidget*
 521 modest_folder_view_new (TnyFolderStoreQuery *query)
 522 {
 523         GObject *self;
 524         ModestFolderViewPrivate *priv;
 525         GtkTreeSelection *sel;
 526
 527         self = G_OBJECT (g_object_new (MODEST_TYPE_FOLDER_VIEW, NULL));
 528         priv = MODEST_FOLDER_VIEW_GET_PRIVATE (self);
 529
 530         priv->query = g_object_ref (query);
 531
 532         sel = gtk_tree_view_get_selection(GTK_TREE_VIEW(self));
 533         priv->changed_signal = g_signal_connect (sel, "changed",
 534                                                  G_CALLBACK (on_selection_changed), self);
 535         return GTK_WIDGET(self);
 536 }
 537
 538
 539 static gboolean
 540 update_model_empty (ModestFolderView *self)
 541 {
 542         ModestFolderViewPrivate *priv;
 543
 544         g_return_val_if_fail (self, FALSE);
 545         priv = MODEST_FOLDER_VIEW_GET_PRIVATE(self);
 546
 547         g_mutex_lock (priv->lock);
 548         {
 549                 if (priv->monitor) {
 550                         tny_folder_monitor_stop (priv->monitor);
 551                         g_object_unref(G_OBJECT(priv->monitor));
 552                         priv->monitor = NULL;
 553                 }
 554         }
 555         g_mutex_unlock (priv->lock);
 556
 557         g_signal_emit (G_OBJECT(self), signals[FOLDER_SELECTION_CHANGED_SIGNAL], 0,
 558                        NULL, TRUE);
 559         return TRUE;
 560 }
 561
 562
 563 /* this feels dirty; any other way to expand all the root items? */
 564 static void
 565 expand_root_items (ModestFolderView *self)
 566 {
 567         GtkTreePath *path;
 568         path = gtk_tree_path_new_first ();
 569
 570         /* all folders should have child items, so.. */
 571         while (gtk_tree_view_expand_row (GTK_TREE_VIEW(self), path, FALSE))
 572                 gtk_tree_path_next (path);
 573
 574         gtk_tree_path_free (path);
 575 }
 576
 577 static gboolean
 578 update_model (ModestFolderView *self, ModestTnyAccountStore *account_store)
 579 {
 580         ModestFolderViewPrivate *priv;
 581
 582         TnyList          *account_list;
 583         GtkTreeModel     *model, *sortable;
 584
 585         g_return_val_if_fail (account_store, FALSE);
 586
 587         priv =  MODEST_FOLDER_VIEW_GET_PRIVATE(self);
 588
 589         /* Notify that there is no folder selected */
 590         update_model_empty (self);
 591
 592         /* FIXME: the local accounts are not shown when the query
 593            selects only the subscribed folders. */
 594 /*      model        = tny_gtk_folder_store_tree_model_new (TRUE, priv->query); */
 595         model        = tny_gtk_folder_store_tree_model_new (TRUE, NULL);
 596         account_list = TNY_LIST(model);
 597
 598         tny_account_store_get_accounts (TNY_ACCOUNT_STORE(account_store),
 599                                         account_list,
 600                                         TNY_ACCOUNT_STORE_STORE_ACCOUNTS);
 601         if (account_list) {
 602                 sortable = gtk_tree_model_sort_new_with_model (model);
 603                 gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE(sortable),
 604                                                       TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN,
 605                                                       GTK_SORT_ASCENDING);
 606                 gtk_tree_sortable_set_sort_func (GTK_TREE_SORTABLE (sortable),
 607                                                  TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN,
 608                                                  cmp_rows, NULL, NULL);
 609
 610                 /* Set new model */
 611                 gtk_tree_view_set_model (GTK_TREE_VIEW(self), sortable);
 612                 expand_root_items (self); /* expand all account folders */
 613                 g_object_unref (account_list);
 614         }
 615
 616         return TRUE;
 617 }
 618
 619
 620 static void
 621 on_selection_changed (GtkTreeSelection *sel, gpointer user_data)
 622 {
 623         GtkTreeModel            *model_sort, *model;
 624         TnyFolder               *folder = NULL;
 625         GtkTreeIter             iter, iter_sort;
 626         GtkTreePath            *path;
 627         ModestFolderView        *tree_view;
 628         ModestFolderViewPrivate *priv;
 629         gint                    type;
 630
 631         g_return_if_fail (sel);
 632         g_return_if_fail (user_data);
 633
 634         priv = MODEST_FOLDER_VIEW_GET_PRIVATE(user_data);
 635         priv->cur_selection = sel;
 636
 637         /* folder was _un_selected if true */
 638         if (!gtk_tree_selection_get_selected (sel, &model_sort, &iter_sort)) {
 639                 priv->cur_folder = NULL; /* FIXME: need this? */
 640                 gtk_tree_row_reference_free (priv->cur_row);
 641                 priv->cur_row = NULL;
 642                 return;
 643         }
 644
 645         model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
 646         gtk_tree_model_sort_convert_iter_to_child_iter (GTK_TREE_MODEL_SORT (model_sort),
 647                                                         &iter,
 648                                                         &iter_sort);
 649
 650         tree_view = MODEST_FOLDER_VIEW (user_data);
 651
 652         gtk_tree_model_get (model, &iter,
 653                             TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
 654                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder,
 655                             -1);
 656
 657         if (type == TNY_FOLDER_TYPE_ROOT) {
 658                 g_object_unref (folder);
 659                 return;
 660         }
 661
 662         /* Current folder was unselected */
 663         g_signal_emit (G_OBJECT(tree_view), signals[FOLDER_SELECTION_CHANGED_SIGNAL], 0,
 664                        priv->cur_folder, FALSE);
 665
 666         if (priv->cur_row) {
 667 /*              tny_folder_sync (priv->cur_folder, TRUE, NULL); /\* FIXME *\/ */
 668                 gtk_tree_row_reference_free (priv->cur_row);
 669         }
 670
 671         /* New current references */
 672         path = gtk_tree_model_get_path (model_sort, &iter_sort);
 673         priv->cur_folder = folder;
 674         priv->cur_row = gtk_tree_row_reference_new (model_sort, path);
 675
 676         /* Frees */
 677         gtk_tree_path_free (path);
 678         g_object_unref (G_OBJECT (folder));
 679
 680         /* New folder has been selected */
 681         g_signal_emit (G_OBJECT(tree_view),
 682                        signals[FOLDER_SELECTION_CHANGED_SIGNAL],
 683                        0, folder, TRUE);
 684 }
 685
 686 TnyFolder *
 687 modest_folder_view_get_selected (ModestFolderView *self)
 688 {
 689         ModestFolderViewPrivate *priv;
 690
 691         g_return_val_if_fail (self, NULL);
 692
 693         priv = MODEST_FOLDER_VIEW_GET_PRIVATE(self);
 694         if (priv->cur_folder)
 695                 g_object_ref (priv->cur_folder);
 696
 697         return priv->cur_folder;
 698 }
 699
 700 /* static gboolean */
 701 /* get_model_iter (ModestFolderView *self,  */
 702 /*              GtkTreeModel **model,  */
 703 /*              GtkTreeIter *iter) */
 704 /* { */
 705 /*      GtkTreeModel *model_sort; */
 706 /*      GtkTreeIter iter_sort; */
 707 /*      GtkTreePath *path; */
 708 /*      ModestFolderViewPrivate *priv; */
 709
 710 /*      priv = MODEST_FOLDER_VIEW_GET_PRIVATE(self); */
 711
 712 /*      if (!priv->cur_folder) */
 713 /*              return FALSE; */
 714
 715 /*      if (!gtk_tree_row_reference_valid (priv->cur_row)) */
 716 /*              return FALSE; */
 717
 718 /*      model_sort = gtk_tree_view_get_model (GTK_TREE_VIEW (self)); */
 719 /*      *model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort)); */
 720
 721 /*      /\* Get path to retrieve iter *\/ */
 722 /*      path = gtk_tree_row_reference_get_path (priv->cur_row); */
 723 /*      if (!gtk_tree_model_get_iter (model_sort, &iter_sort, path)) */
 724 /*              return FALSE; */
 725
 726 /*      gtk_tree_model_sort_convert_iter_to_child_iter (GTK_TREE_MODEL_SORT (model_sort), */
 727 /*                                                      iter, */
 728 /*                                                      &iter_sort); */
 729 /*      return TRUE; */
 730 /* } */
 731
 732 static gint
 733 cmp_rows (GtkTreeModel *tree_model, GtkTreeIter *iter1, GtkTreeIter *iter2,
 734           gpointer user_data)
 735 {
 736         gint cmp;
 737         gchar         *name1, *name2;
 738         TnyFolderType type;
 739         TnyFolder     *folder1, *folder2;
 740
 741         gtk_tree_model_get (tree_model, iter1,
 742                             TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &name1,
 743                             TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
 744                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder1,
 745                             -1);
 746         gtk_tree_model_get (tree_model, iter2,
 747                             TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &name2,
 748                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder2,
 749                             -1);
 750
 751         /* local_folders should be the last one */
 752         if (type == TNY_FOLDER_TYPE_ROOT) {
 753                 /* the account name is also the name of the root folder
 754                  * in case of local folders */
 755                 if (name1 && strcmp (name1, MODEST_LOCAL_FOLDERS_ACCOUNT_NAME) == 0)
 756                         cmp = +1;
 757                 else if (name2 && strcmp (name2, MODEST_LOCAL_FOLDERS_ACCOUNT_NAME) == 0)
 758                         cmp = -1;
 759                 else
 760                         cmp = modest_text_utils_utf8_strcmp (name1, name2, TRUE);
 761         } else
 762                 cmp = modest_text_utils_utf8_strcmp (name1, name2, TRUE);
 763
 764
 765         if (folder1)
 766                 g_object_unref(G_OBJECT(folder1));
 767         if (folder2)
 768                 g_object_unref(G_OBJECT(folder2));
 769
 770         g_free (name1);
 771         g_free (name2);
 772
 773         return cmp;
 774 }
 775
 776 /*****************************************************************************/
 777 /*                        DRAG and DROP stuff                                */
 778 /*****************************************************************************/
 779
 780 /*
 781  * This function fills the #GtkSelectionData with the row and the
 782  * model that has been dragged. It's called when this widget is a
 783  * source for dnd after the event drop happened
 784  */
 785 static void
 786 on_drag_data_get (GtkWidget *widget,
 787                   GdkDragContext *context,
 788                   GtkSelectionData *selection_data,
 789                   guint info,
 790                   guint time,
 791                   gpointer data)
 792 {
 793         GtkTreeSelection *selection;
 794         GtkTreeModel *model_sort, *model;
 795         GtkTreeIter iter;
 796         GtkTreePath *source_row_sort;
 797         GtkTreePath *source_row;
 798
 799         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (widget));
 800         gtk_tree_selection_get_selected (selection, &model_sort, &iter);
 801         source_row_sort = gtk_tree_model_get_path (model_sort, &iter);
 802
 803         /* Get the unsorted path and model */
 804         model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
 805         source_row = gtk_tree_model_sort_convert_path_to_child_path (GTK_TREE_MODEL_SORT (model_sort),
 806                                                                      source_row_sort);
 807
 808         gtk_tree_set_row_drag_data (selection_data,
 809                                     model,
 810                                     source_row);
 811
 812         gtk_tree_path_free (source_row_sort);
 813         gtk_tree_path_free (source_row);
 814 }
 815
 816 typedef struct _DndHelper {
 817         gboolean delete_source;
 818         GtkWidget *source_widget;
 819         GtkWidget *dest_widget;
 820         GtkTreePath *source_row;
 821         GdkDragContext *context;
 822         guint time;
 823 } DndHelper;
 824
 825
 826 /*
 827  * This function saves the source row in the source widget, will be
 828  * used by the drag-data-delete handler to remove the source row
 829  */
 830 static void
 831 save_and_clean (DndHelper *helper,
 832                 gboolean success)
 833 {
 834         /* Save row data */
 835         if (success && helper->delete_source)
 836                 g_object_set_data (G_OBJECT (helper->source_widget),
 837                                    ROW_REF_DATA_NAME,
 838                                    gtk_tree_path_copy (helper->source_row));
 839
 840         /* Clean dest row */
 841         gtk_tree_view_set_drag_dest_row (GTK_TREE_VIEW (helper->dest_widget),
 842                                          NULL,
 843                                          GTK_TREE_VIEW_DROP_BEFORE);
 844
 845 }
 846
 847 /*
 848  * This function is the callback of the
 849  * modest_mail_operation_xfer_msg() call. We check here if the message
 850  * was correctly asynchronously transfered
 851  */
 852 static void
 853 on_progress_changed (ModestMailOperation *mail_op, gpointer user_data)
 854 {
 855         ModestMailOperationQueue *queue;
 856         gboolean success = FALSE;
 857         DndHelper *helper;
 858
 859         helper = (DndHelper *) user_data;
 860
 861         if (modest_mail_operation_get_status (mail_op) ==
 862             MODEST_MAIL_OPERATION_STATUS_SUCCESS) {
 863                 success = TRUE;
 864         } else {
 865                 const GError *error;
 866                 error = modest_mail_operation_get_error (mail_op);
 867                 g_warning ("Error transferring messages: %s\n", error->message);
 868         }
 869
 870         /* Remove the mail operation */
 871         queue = modest_runtime_get_mail_operation_queue ();
 872         modest_mail_operation_queue_remove (queue, mail_op);
 873         g_object_unref (G_OBJECT (mail_op));
 874
 875         /* Save and clean */
 876         save_and_clean (helper, success);
 877
 878         /* Notify the drag source */
 879         gtk_drag_finish (helper->context, success, (success && helper->delete_source), helper->time);
 880
 881         /* Free the helper */
 882         g_slice_free (DndHelper, helper);
 883 }
 884
 885 /*
 886  * This function is used by drag_data_received_cb to manage drag and
 887  * drop of a header, i.e, and drag from the header view to the folder
 888  * view.
 889  */
 890 static void
 891 drag_and_drop_from_header_view (GtkTreeModel *source_model,
 892                                 GtkTreeModel *dest_model,
 893                                 GtkTreePath  *dest_row,
 894                                 DndHelper    *helper)
 895 {
 896         TnyHeader *header;
 897         TnyFolder *folder;
 898         ModestMailOperationQueue *queue;
 899         ModestMailOperation *mail_op;
 900         gboolean started;
 901         GtkTreeIter source_iter, dest_iter;
 902
 903         /* Get header */
 904         gtk_tree_model_get_iter (source_model, &source_iter, helper->source_row);
 905         gtk_tree_model_get (source_model, &source_iter,
 906                             TNY_GTK_HEADER_LIST_MODEL_INSTANCE_COLUMN,
 907                             &header, -1);
 908
 909         /* Get Folder */
 910         gtk_tree_model_get_iter (dest_model, &dest_iter, dest_row);
 911         gtk_tree_model_get (dest_model, &dest_iter,
 912                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN,
 913                             &folder, -1);
 914
 915         /* Transfer message */
 916         queue = modest_runtime_get_mail_operation_queue ();
 917         mail_op = modest_mail_operation_new ();
 918         started = modest_mail_operation_xfer_msg (mail_op, header,
 919                                                   folder, helper->delete_source);
 920         if (started) {
 921                 g_signal_connect (G_OBJECT (mail_op), "progress_changed",
 922                                   G_CALLBACK (on_progress_changed), helper);
 923                 modest_mail_operation_queue_add (queue, mail_op);
 924         } else {
 925                 const GError *error;
 926                 error = modest_mail_operation_get_error (mail_op);
 927                 if (error)
 928                         g_warning ("Error trying to transfer messages: %s\n",
 929                                    error->message);
 930
 931                 g_slice_free (DndHelper, helper);
 932         }
 933
 934         /* Frees */
 935         g_object_unref (G_OBJECT (mail_op));
 936         g_object_unref (G_OBJECT (header));
 937         g_object_unref (G_OBJECT (folder));
 938 }
 939
 940 /*
 941  * This function is used by drag_data_received_cb to manage drag and
 942  * drop of a folder, i.e, and drag from the folder view to the same
 943  * folder view.
 944  */
 945 static void
 946 drag_and_drop_from_folder_view (GtkTreeModel     *source_model,
 947                                 GtkTreeModel     *dest_model,
 948                                 GtkTreePath      *dest_row,
 949                                 GtkSelectionData *selection_data,
 950                                 DndHelper        *helper)
 951 {
 952         ModestMailOperation *mail_op;
 953         const GError *error;
 954         GtkTreeRowReference *source_row_reference;
 955         GtkTreeIter parent_iter, iter;
 956         TnyFolder *folder, *new_folder;
 957         TnyFolderStore *parent_folder;
 958         gboolean success = FALSE;
 959
 960         /* Check if the drag is possible */
 961         if (!gtk_tree_path_compare (helper->source_row, dest_row))
 962                 goto out;
 963
 964         if (!gtk_tree_drag_dest_row_drop_possible (GTK_TREE_DRAG_DEST (dest_model),
 965                                                    dest_row,
 966                                                    selection_data))
 967                 goto out;
 968
 969         /* Get data */
 970         gtk_tree_model_get_iter (source_model, &parent_iter, dest_row);
 971         gtk_tree_model_get_iter (source_model, &iter, helper->source_row);
 972         gtk_tree_model_get (source_model, &parent_iter,
 973                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN,
 974                             &parent_folder, -1);
 975         gtk_tree_model_get (source_model, &iter,
 976                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN,
 977                             &folder, -1);
 978
 979         /* Do the mail operation */
 980         mail_op = modest_mail_operation_new ();
 981         new_folder = modest_mail_operation_xfer_folder (mail_op, folder, parent_folder,
 982                                                         helper->delete_source);
 983
 984         g_object_unref (G_OBJECT (parent_folder));
 985         g_object_unref (G_OBJECT (folder));
 986
 987         error = modest_mail_operation_get_error (mail_op);
 988         if (error) {
 989                 g_warning ("Error transferring folder: %s\n", error->message);
 990                 g_object_unref (G_OBJECT (mail_op));
 991                 goto out;
 992         }
 993         g_object_unref (G_OBJECT (mail_op));
 994
 995         /* Get a row reference to the source path because the path
 996            could change after the insertion. The gtk_drag_finish() is
 997            not able to delete the source because that, so we have to
 998            do it manually */
 999         source_row_reference = gtk_tree_row_reference_new (source_model, helper->source_row);
1000         gtk_tree_path_free (helper->source_row);
1001
1002         /* Insert the dragged row as a child of the dest row */
1003         gtk_tree_path_down (dest_row);
1004         if (gtk_tree_drag_dest_drag_data_received (GTK_TREE_DRAG_DEST (dest_model),
1005                                                    dest_row,
1006                                                    selection_data)) {
1007
1008                 GtkTreeIter iter;
1009
1010                 /* Set the newly created folder as the instance in the row */
1011                 gtk_tree_model_get_iter (dest_model, &iter, dest_row);
1012                 gtk_tree_store_set (GTK_TREE_STORE (dest_model), &iter,
1013                                     TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN,
1014                                     new_folder, -1);
1015                 g_object_unref (G_OBJECT (new_folder));
1016
1017                 helper->source_row = gtk_tree_row_reference_get_path (source_row_reference);
1018
1019                 success = TRUE;
1020         }
1021         gtk_tree_row_reference_free (source_row_reference);
1022
1023         /* Save and clean */
1024         save_and_clean (helper, success);
1025
1026  out:
1027         gtk_drag_finish (helper->context, success, (success && helper->delete_source), helper->time);
1028 }
1029
1030 /*
1031  * This function receives the data set by the "drag-data-get" signal
1032  * handler. This information comes within the #GtkSelectionData. This
1033  * function will manage both the drags of folders of the treeview and
1034  * drags of headers of the header view widget.
1035  */
1036 static void
1037 on_drag_data_received (GtkWidget *widget,
1038                        GdkDragContext *context,
1039                        gint x,
1040                        gint y,
1041                        GtkSelectionData *selection_data,
1042                        guint target_type,
1043                        guint time,
1044                        gpointer data)
1045 {
1046         GtkWidget *source_widget;
1047         GtkTreeModel *model_sort, *dest_model, *source_model;
1048         GtkTreePath *source_row, *dest_row, *child_dest_row;
1049         GtkTreeViewDropPosition pos;
1050         gboolean success = FALSE, delete_source = FALSE;
1051         DndHelper *helper;
1052
1053         /* Do not allow further process */
1054         g_signal_stop_emission_by_name (widget, "drag-data-received");
1055
1056         /* Get the action */
1057         if (context->action == GDK_ACTION_MOVE)
1058                 delete_source = TRUE;
1059
1060         /* Check if the get_data failed */
1061         if (selection_data == NULL || selection_data->length < 0)
1062                 gtk_drag_finish (context, success, (success && delete_source), time);
1063
1064         /* Get the models */
1065         source_widget = gtk_drag_get_source_widget (context);
1066         gtk_tree_get_row_drag_data (selection_data,
1067                                     &source_model,
1068                                     &source_row);
1069
1070         model_sort = gtk_tree_view_get_model (GTK_TREE_VIEW (widget));
1071         /* Select the destination model */
1072         if (source_widget == widget) {
1073                 dest_model = source_model;
1074         } else {
1075                 dest_model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
1076         }
1077
1078         /* Get the path to the destination row. Can not call
1079            gtk_tree_view_get_drag_dest_row() because the source row
1080            is not selected anymore */
1081         gtk_tree_view_get_dest_row_at_pos (GTK_TREE_VIEW (widget), x, y,
1082                                            &dest_row, &pos);
1083
1084         /* Only allow drops IN other rows */
1085         if (!dest_row || pos == GTK_TREE_VIEW_DROP_BEFORE || pos == GTK_TREE_VIEW_DROP_AFTER)
1086                 gtk_drag_finish (context, success, (success && delete_source), time);
1087
1088         /* Create the helper */
1089         helper = g_slice_new0 (DndHelper);
1090         helper->delete_source = delete_source;
1091         helper->source_widget = source_widget;
1092         helper->dest_widget = widget;
1093         helper->source_row = source_row;
1094         helper->context = context;
1095         helper->time = time;
1096
1097         /* Get path from the unsorted model */
1098         child_dest_row =
1099                 gtk_tree_model_sort_convert_path_to_child_path (GTK_TREE_MODEL_SORT (model_sort),
1100                                                                 dest_row);
1101         gtk_tree_path_free (dest_row);
1102
1103         /* Drags from the header view */
1104         if (source_widget != widget) {
1105
1106                 drag_and_drop_from_header_view (source_model,
1107                                                 dest_model,
1108                                                 child_dest_row,
1109                                                 helper);
1110         } else {
1111
1112
1113                 drag_and_drop_from_folder_view (source_model,
1114                                                 dest_model,
1115                                                 child_dest_row,
1116                                                 selection_data,
1117                                                 helper);
1118         }
1119         gtk_tree_path_free (child_dest_row);
1120 }
1121
1122 /*
1123  * We define a "drag-drop" signal handler because we do not want to
1124  * use the default one, because the default one always calls
1125  * gtk_drag_finish and we prefer to do it in the "drag-data-received"
1126  * signal handler, because there we have all the information available
1127  * to know if the dnd was a success or not.
1128  */
1129 static gboolean
1130 drag_drop_cb (GtkWidget      *widget,
1131               GdkDragContext *context,
1132               gint            x,
1133               gint            y,
1134               guint           time,
1135               gpointer        user_data)
1136 {
1137         gpointer target;
1138
1139         if (!context->targets)
1140                 return FALSE;
1141
1142         /* Check if we're dragging a folder row */
1143         target = gtk_drag_dest_find_target (widget, context, NULL);
1144
1145         /* Request the data from the source. */
1146         gtk_drag_get_data(widget, context, target, time);
1147
1148     return TRUE;
1149 }
1150
1151 /*
1152  * This function deletes the data that has been dragged from its
1153  * source widget. Since is a function received by the source of the
1154  * drag, this function only deletes rows of the folder view
1155  * widget. The header view widget will need to define its own one.
1156  */
1157 static void
1158 drag_data_delete_cb (GtkWidget      *widget,
1159                      GdkDragContext *context,
1160                      gpointer        user_data)
1161 {
1162         GtkTreePath *source_row;
1163         GtkTreeModel *model_sort, *model;
1164
1165         model_sort = gtk_tree_view_get_model (GTK_TREE_VIEW (widget));
1166         model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
1167         source_row = g_object_steal_data (G_OBJECT (widget), ROW_REF_DATA_NAME);
1168
1169         /* Delete the source row */
1170         gtk_tree_drag_source_drag_data_delete (GTK_TREE_DRAG_SOURCE (model),
1171                                                source_row);
1172
1173         gtk_tree_path_free (source_row);
1174 }
1175
1176 /*
1177  * This function expands a node of a tree view if it's not expanded
1178  * yet. Not sure why it needs the threads stuff, but gtk+`example code
1179  * does that, so that's why they're here.
1180  */
1181 static gint
1182 expand_row_timeout (gpointer data)
1183 {
1184         GtkTreeView *tree_view = data;
1185         GtkTreePath *dest_path = NULL;
1186         GtkTreeViewDropPosition pos;
1187         gboolean result = FALSE;
1188
1189         GDK_THREADS_ENTER ();
1190
1191         gtk_tree_view_get_drag_dest_row (tree_view,
1192                                          &dest_path,
1193                                          &pos);
1194
1195         if (dest_path &&
1196             (pos == GTK_TREE_VIEW_DROP_INTO_OR_AFTER ||
1197              pos == GTK_TREE_VIEW_DROP_INTO_OR_BEFORE)) {
1198                 gtk_tree_view_expand_row (tree_view, dest_path, FALSE);
1199                 gtk_tree_path_free (dest_path);
1200         }
1201         else {
1202                 if (dest_path)
1203                         gtk_tree_path_free (dest_path);
1204
1205                 result = TRUE;
1206         }
1207
1208         GDK_THREADS_LEAVE ();
1209
1210         return result;
1211 }
1212
1213 /*
1214  * This function is called whenever the pointer is moved over a widget
1215  * while dragging some data. It installs a timeout that will expand a
1216  * node of the treeview if not expanded yet. This function also calls
1217  * gdk_drag_status in order to set the suggested action that will be
1218  * used by the "drag-data-received" signal handler to know if we
1219  * should do a move or just a copy of the data.
1220  */
1221 static gboolean
1222 on_drag_motion (GtkWidget      *widget,
1223                 GdkDragContext *context,
1224                 gint            x,
1225                 gint            y,
1226                 guint           time,
1227                 gpointer        user_data)
1228 {
1229         GtkTreeViewDropPosition pos;
1230         GtkTreePath *dest_row;
1231         ModestFolderViewPrivate *priv;
1232         GdkDragAction suggested_action;
1233
1234         priv = MODEST_FOLDER_VIEW_GET_PRIVATE (widget);
1235
1236         if (priv->timer_expander != 0) {
1237                 g_source_remove (priv->timer_expander);
1238                 priv->timer_expander = 0;
1239         }
1240
1241         gtk_tree_view_get_dest_row_at_pos (GTK_TREE_VIEW (widget),
1242                                            x, y,
1243                                            &dest_row,
1244                                            &pos);
1245
1246         if (!dest_row)
1247                 return FALSE;
1248
1249         /* Expand the selected row after 1/2 second */
1250         if (!gtk_tree_view_row_expanded (GTK_TREE_VIEW (widget), dest_row)) {
1251                 gtk_tree_view_set_drag_dest_row (GTK_TREE_VIEW (widget), dest_row, pos);
1252                 priv->timer_expander = g_timeout_add (500, expand_row_timeout, widget);
1253         }
1254         gtk_tree_path_free (dest_row);
1255
1256         /* Select the desired action. By default we pick MOVE */
1257         suggested_action = GDK_ACTION_MOVE;
1258
1259         if (context->actions == GDK_ACTION_COPY)
1260             gdk_drag_status(context, GDK_ACTION_COPY, time);
1261         else if (context->actions == GDK_ACTION_MOVE)
1262             gdk_drag_status(context, GDK_ACTION_MOVE, time);
1263         else if (context->actions & suggested_action)
1264             gdk_drag_status(context, suggested_action, time);
1265         else
1266             gdk_drag_status(context, GDK_ACTION_DEFAULT, time);
1267
1268         return TRUE;
1269 }
1270
1271
1272 /* Folder view drag types */
1273 const GtkTargetEntry folder_view_drag_types[] =
1274 {
1275         { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_WIDGET, FOLDER_ROW },
1276         { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_APP, HEADER_ROW }
1277 };
1278
1279 /*
1280  * This function sets the treeview as a source and a target for dnd
1281  * events. It also connects all the requirede signals.
1282  */
1283 static void
1284 setup_drag_and_drop (GtkTreeView *self)
1285 {
1286         /* Set up the folder view as a dnd destination. Set only the
1287            highlight flag, otherwise gtk will have a different
1288            behaviour */
1289         gtk_drag_dest_set (GTK_WIDGET (self),
1290                            GTK_DEST_DEFAULT_HIGHLIGHT,
1291                            folder_view_drag_types,
1292                            G_N_ELEMENTS (folder_view_drag_types),
1293                            GDK_ACTION_MOVE | GDK_ACTION_COPY);
1294
1295         gtk_signal_connect(GTK_OBJECT (self),
1296                            "drag_data_received",
1297                            GTK_SIGNAL_FUNC(on_drag_data_received),
1298                            NULL);
1299
1300
1301         /* Set up the treeview as a dnd source */
1302         gtk_drag_source_set (GTK_WIDGET (self),
1303                              GDK_BUTTON1_MASK,
1304                              folder_view_drag_types,
1305                              G_N_ELEMENTS (folder_view_drag_types),
1306                              GDK_ACTION_MOVE | GDK_ACTION_COPY);
1307
1308         gtk_signal_connect(GTK_OBJECT (self),
1309                            "drag_data_delete",
1310                            GTK_SIGNAL_FUNC(drag_data_delete_cb),
1311                            NULL);
1312
1313         gtk_signal_connect(GTK_OBJECT (self),
1314                            "drag_motion",
1315                            GTK_SIGNAL_FUNC(on_drag_motion),
1316                            NULL);
1317
1318
1319         gtk_signal_connect(GTK_OBJECT (self),
1320                            "drag_data_get",
1321                            GTK_SIGNAL_FUNC(on_drag_data_get),
1322                            NULL);
1323
1324         gtk_signal_connect(GTK_OBJECT (self),
1325                            "drag_drop",
1326                            GTK_SIGNAL_FUNC(drag_drop_cb),
1327                            NULL);
1328 }