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