path: root/mail/mail-folder-cache.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* mail-folder-cache.c: Stores information about open folders */

/* 
 * Authors: Peter Williams <peterw@ximian.com>
 *
 * Copyright 2000,2001 Ximian, Inc. (www.ximian.com)
 *
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License as 
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef G_LOG_DOMAIN
#undef G_LOG_DOMAIN
#endif
#define G_LOG_DOMAIN "folder cache"

#include <bonobo/bonobo-exception.h>

#include "mail-mt.h"
#include "mail-folder-cache.h"

#define ld(x) 
#define d(x) 

/* Structures */

typedef enum mail_folder_info_flags {
    MAIL_FIF_UNREAD_VALID = (1 << 0),
    MAIL_FIF_TOTAL_VALID = (1 << 1),
    MAIL_FIF_HIDDEN_VALID = (1 << 2),
    MAIL_FIF_FOLDER_VALID = (1 << 3),
    MAIL_FIF_NEED_UPDATE = (1 << 4),
    MAIL_FIF_PATH_VALID = (1 << 5),
    MAIL_FIF_NAME_VALID = (1 << 6),
    MAIL_FIF_FB_VALID = (1 << 8),
    MAIL_FIF_SELECTED_VALID = (1 << 9)
} mfif;

typedef enum mail_folder_info_update_mode {
    MAIL_FIUM_UNKNOWN,
    MAIL_FIUM_EVOLUTION_STORAGE,
    MAIL_FIUM_LOCAL_STORAGE /*,*/
    /*MAIL_FIUM_SHELL_VIEW*/
} mfium;

typedef union mail_folder_info_update_info {
    EvolutionStorage *es;
    GNOME_Evolution_Storage ls;
} mfiui;

typedef struct _mail_folder_info {
    gchar *uri;
    gchar *path;

    CamelFolder *folder;
    gchar *name;

    guint flags;
    guint unread, total, hidden, selected;

    FolderBrowser *fb;

    int timeout_id;
    int mail_info_id;

    mfium update_mode;
    mfiui update_info;
} mail_folder_info;

static GHashTable *folders = NULL;
static GStaticMutex folders_lock = G_STATIC_MUTEX_INIT;

#define LOCK_FOLDERS()   G_STMT_START { ld(g_message ("Locking folders")); g_static_mutex_lock (&folders_lock); } G_STMT_END
#define UNLOCK_FOLDERS() G_STMT_START { ld(g_message ("Unocking folders")); g_static_mutex_unlock (&folders_lock); } G_STMT_END

static GNOME_Evolution_ShellView shell_view = CORBA_OBJECT_NIL;
static FolderBrowser *folder_browser = NULL;

extern CamelFolder *outbox_folder;

/* Private functions */

/* call this with the folders locked */
static mail_folder_info *
get_folder_info (const gchar *uri)
{
    mail_folder_info *mfi;

    g_return_val_if_fail (uri, NULL);

    if (folders == NULL) {
        d(g_message("Initializing"));
        folders = g_hash_table_new (g_str_hash, g_str_equal);
    }

    mfi = g_hash_table_lookup (folders, uri);

    if (!mfi) {
        d(g_message("New entry for uri %s", uri));

        mfi = g_new (mail_folder_info, 1);
        mfi->uri = g_strdup (uri); /* XXX leak leak leak */
        mfi->path = NULL;
        mfi->folder = NULL;
        mfi->name = NULL;
        mfi->fb = NULL;
        mfi->flags = 0;
        mfi->update_mode = MAIL_FIUM_UNKNOWN;
        mfi->update_info.es = NULL;
        mfi->timeout_id = 0;
        mfi->mail_info_id = 0;
        mfi->unread = 0;

        g_hash_table_insert (folders, mfi->uri, mfi);
    } else
        d(g_message("Hit cache for uri %s", uri));

    return mfi;
}

/* call with the folders locked */

static gchar *
make_folder_status (mail_folder_info *mfi)
{
    gboolean set_one = FALSE;
    GString *work;
    gchar *ret;

    /* Build the display string */

    work = g_string_new ("");

    if (mfi->flags & MAIL_FIF_UNREAD_VALID) {
        g_string_sprintfa (work, _("%d new"), mfi->unread);
        set_one = TRUE;
    }
        
    if (mfi->flags & MAIL_FIF_HIDDEN_VALID && mfi->hidden) {
        if (set_one)
            work = g_string_append (work, _(", "));
        g_string_sprintfa (work, _("%d hidden"), mfi->hidden);
        set_one = TRUE;
    }
        
    if (mfi->flags & MAIL_FIF_SELECTED_VALID && mfi->selected > 1) {
        if (set_one)
            work = g_string_append (work, _(", "));
        g_string_sprintfa (work, _("%d selected"), mfi->selected);
        set_one = TRUE;
    }
        
    if (mfi->flags & MAIL_FIF_TOTAL_VALID) {
        if (set_one)
            work = g_string_append (work, _(", "));

        if (mfi->flags & MAIL_FIF_FOLDER_VALID && mfi->folder == outbox_folder)
            g_string_sprintfa (work, _("%d unsent"), mfi->total);
        else
            g_string_sprintfa (work, _("%d total"), mfi->total);
    }

    ret = work->str;
    g_string_free (work, FALSE);
    return ret;
}

static gboolean
update_idle (gpointer user_data)
{
    mail_folder_info *mfi = (mail_folder_info *) user_data;
    gchar *f_status;
    gchar *uri, *path;
    mfiui info;
    mfium mode;
    FolderBrowser *fb;
    CORBA_Environment ev;

    LOCK_FOLDERS ();

    d(g_message("update_idle called"));

    mfi->timeout_id = 0;

    /* Check if this makes sense */

    if (!(mfi->flags & MAIL_FIF_NAME_VALID)) {
        g_warning ("Folder cache update info of \'%s\' without \'name\' set", mfi->uri);
        UNLOCK_FOLDERS ();
        return FALSE;
    }

    if (mfi->update_mode == MAIL_FIUM_UNKNOWN) {
        g_warning ("Folder cache update info of \'%s\' without \'mode\' set", mfi->uri);
        UNLOCK_FOLDERS ();
        return FALSE;
    }

    /* Get the display string */

    f_status = make_folder_status (mfi);

    /* Set the value */

    /* Who knows how long these corba calls will take? 
     * Copy the data from mfi so we can UNLOCK_FOLDERS
     * before the calls.
     */

    info = mfi->update_info;
    uri = g_strdup (mfi->uri);
    if (mfi->flags & MAIL_FIF_PATH_VALID)
        path = g_strdup (mfi->path);
    else
        path = NULL;
    mode = mfi->update_mode;
    if (mfi->flags & MAIL_FIF_FB_VALID)
        fb = mfi->fb;
    else
        fb = NULL;

    UNLOCK_FOLDERS ();

    switch (mode) {
    case MAIL_FIUM_LOCAL_STORAGE:
        CORBA_exception_init (&ev);
        GNOME_Evolution_Storage_updateFolder (info.ls,
                              mfi->path,
                              mfi->name,
                              mfi->unread,
                              &ev);
        if (BONOBO_EX (&ev))
            g_warning ("Exception in local storage update: %s",
                   bonobo_exception_get_text (&ev));
        CORBA_exception_free (&ev);
        break;
    case MAIL_FIUM_EVOLUTION_STORAGE:
        d(g_message("Updating via EvolutionStorage"));
        evolution_storage_update_folder_by_uri (info.es,
                            uri,
                            mfi->name,
                            mfi->unread);
        break;
    case MAIL_FIUM_UNKNOWN:
    default:
        g_assert_not_reached ();
        break;
    }

    /* Now set the folder bar if reasonable -- we need a shell view,
     * and the active folder browser should be the one associated with
     * this MFI */

    if (shell_view != CORBA_OBJECT_NIL &&
        fb && folder_browser == fb) {
        d(g_message("Updating via ShellView"));
        CORBA_exception_init (&ev);
        GNOME_Evolution_ShellView_setFolderBarLabel (shell_view,
                                 f_status,
                                 &ev);
        if (BONOBO_EX (&ev))
            g_warning ("Exception in folder bar label update: %s",
                   bonobo_exception_get_text (&ev));
        CORBA_exception_free (&ev);

#if 0
        GNOME_Evolution_ShellView_setTitle (shell_view,
                            wide,
                            &ev);
        if (BONOBO_EX (&ev))
            g_warning ("Exception in shell view title update: %s",
                   bonobo_exception_get_text (&ev));
        CORBA_exception_free (&ev);
#endif
    }

    /* Cleanup */

    g_free (uri);
    g_free (path);
    g_free (f_status);
    return FALSE;
}

static void
maybe_update (mail_folder_info *mfi)
{
    if (mfi->timeout_id)
        return;

    mfi->timeout_id = g_timeout_add (100, update_idle, mfi);
}

static void
update_message_counts_main (CamelObject *object, gpointer event_data,
                gpointer user_data)
{
    mail_folder_info *mfi;
    gchar *uri = (gchar *) user_data;

    LOCK_FOLDERS ();
    
    mfi = get_folder_info (uri);

    /* if folder is no longer valid, these numbers are useless */
    if (mfi->flags & MAIL_FIF_FOLDER_VALID) {
        d(g_message("Message counts in CamelFolder changed, queuing idle"));
        mfi->flags &= (~MAIL_FIF_NEED_UPDATE);
        maybe_update (mfi);
    }

    UNLOCK_FOLDERS ();

    g_free (uri);
}

static void
update_message_counts (CamelObject *object, gpointer event_data,
               gpointer user_data)
{
    CamelFolder *folder = CAMEL_FOLDER (object);
    mail_folder_info *mfi;
    gchar *uri = g_quark_to_string (GPOINTER_TO_UINT (user_data));
    int unread;
    int total;

    d(g_message("CamelFolder %p changed, examining message counts", object));

    unread = camel_folder_get_unread_message_count (folder);
    total = camel_folder_get_message_count (folder);

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    /* we might have been removed in the meantime... this could 
     * conceivably fail if _note_folder was called immediately
     * after the URL was removed, and we would get the counts
     * for the wrong folder, but the chances of that happening
     * are miniscule.
     */

    if (!(mfi->flags & MAIL_FIF_FOLDER_VALID)) {
        d(g_message("-> Folder is no longer valid, cancelling updates"));
        UNLOCK_FOLDERS ();
        return;
    }

    mfi->flags &= (~MAIL_FIF_NEED_UPDATE);

    /* '-1' seems to show up a lot, just skip it.
     * Probably a better way. */
    if (unread == -1) {
        /* nuttzing */
    } else if (mfi->flags & MAIL_FIF_UNREAD_VALID) {
        if (mfi->unread != unread) {
            d(g_message("-> Unread value is changed"));
            mfi->unread = unread;
            mfi->flags |= MAIL_FIF_NEED_UPDATE;
        } else 
            d(g_message("-> Unread value is the same"));
    } else {
        d(g_message("-> Unread value being initialized"));
        mfi->flags |= (MAIL_FIF_UNREAD_VALID | MAIL_FIF_NEED_UPDATE);
        mfi->unread = unread;
    }

    if (mfi->flags & MAIL_FIF_TOTAL_VALID) {
        if (mfi->total != total) {
            d(g_message("-> Total value is changed"));
            mfi->total = total;
            mfi->flags |= MAIL_FIF_NEED_UPDATE;
        } else 
            d(g_message("-> Total value is the same"));
    } else {
        d(g_message("-> Total value being initialized"));
        mfi->flags |= (MAIL_FIF_TOTAL_VALID | MAIL_FIF_NEED_UPDATE);
        mfi->total = total;
    }

    /* while we're here... */
    if (!(mfi->flags & MAIL_FIF_NAME_VALID)) {
        mfi->name = g_strdup (camel_folder_get_name (CAMEL_FOLDER (object)));
        d(g_message("-> setting name to %s as well", mfi->name));
        mfi->flags |= MAIL_FIF_NAME_VALID;
    }

    if (mfi->flags & MAIL_FIF_NEED_UPDATE) {
        UNLOCK_FOLDERS ();
        d(g_message("-> Queuing change"));
        mail_proxy_event (update_message_counts_main, object, event_data, g_strdup (uri));
    } else {
        UNLOCK_FOLDERS ();
        d(g_message("-> No proxy event needed"));
    }
}

static void
camel_folder_finalized (CamelObject *object, gpointer event_data,
            gpointer user_data)
{
    mail_folder_info *mfi;
    gchar *uri = g_quark_to_string (GPOINTER_TO_UINT (user_data));

    d(g_message("CamelFolder %p finalized, unsetting FOLDER_VALID", object));

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    /* we could check for FOLDER_VALID, but why bother? */
    mfi->flags &= (~MAIL_FIF_FOLDER_VALID);
    mfi->folder = NULL;

    UNLOCK_FOLDERS ();
}

static void
message_list_built (MessageList *ml, gpointer user_data)
{
    mail_folder_info *mfi;
    gchar *uri = g_quark_to_string (GPOINTER_TO_UINT (user_data));

    d(g_message("Message list %p rebuilt, checking hidden", ml));

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    if (!(mfi->flags & MAIL_FIF_FB_VALID)) {
        d(g_message ("-> we seem to have been removed. Returning."));
        UNLOCK_FOLDERS ();
        return;
    }

    if (ml->folder != mfi->folder) {
        g_warning ("folder cache: different folders in cache and messagelist");
        gtk_signal_disconnect_by_data (GTK_OBJECT (ml), user_data);
        UNLOCK_FOLDERS ();
        return;
    }

    MESSAGE_LIST_LOCK (ml, hide_lock);
    if (ml->hidden)
        mfi->hidden = g_hash_table_size (ml->hidden);
    else
        mfi->hidden = 0;
    MESSAGE_LIST_UNLOCK (ml, hide_lock);

    mfi->flags |= MAIL_FIF_HIDDEN_VALID;

    UNLOCK_FOLDERS ();

    maybe_update (mfi);
}

static void
selection_changed (ESelectionModel *esm, gpointer user_data)
{
    mail_folder_info *mfi;
    gchar *uri = g_quark_to_string (GPOINTER_TO_UINT (user_data));
    
    d(g_message ("Selection model %p changed, checking selected", esm));

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    if (!(mfi->flags & MAIL_FIF_FB_VALID)) {
        d(g_message ("-> hm, fb is not valid. We must have been removed."));
        UNLOCK_FOLDERS ();
        return;
    }

    mfi->selected = e_selection_model_selected_count (esm);
    mfi->flags |= MAIL_FIF_SELECTED_VALID;

    UNLOCK_FOLDERS ();

    maybe_update (mfi);
}

static void
folder_browser_destroyed (GtkObject *fb, gpointer user_data)
{
    mail_folder_info *mfi;
    gchar *uri = g_quark_to_string (GPOINTER_TO_UINT (user_data));
    
    d(g_message ("folder browser destroyed. Unsetting FB_VALID."));

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    /* we could check for FB_VALID, but why bother? */
    mfi->flags &= (~MAIL_FIF_FB_VALID);
    mfi->fb = NULL;
    UNLOCK_FOLDERS ();
}

static void
check_for_fb_match (gpointer key, gpointer value, gpointer user_data)
{
    mail_folder_info *mfi = (mail_folder_info *) value;

    d(g_message("-> checking uri \"%s\" if it has active fb", (gchar *) key));
    /* This should only be true for one item, but no real
     * way to stop the foreach...
     */
 
    if (mfi->fb == folder_browser) {
        d(g_message("-> -> it does!"));
        maybe_update (mfi);
    }
}

/* get folder info operation */

struct get_mail_info_msg {
    struct _mail_msg msg;

    CamelFolder *folder;
    gchar *uri;
};

static char *
get_mail_info_describe (struct _mail_msg *msg, int complete)
{
    struct get_mail_info_msg *gmim = (struct get_mail_info_msg *) msg;

    return g_strdup_printf ("Examining \'%s\'", camel_folder_get_full_name (gmim->folder));
}

static void
get_mail_info_receive (struct _mail_msg *msg)
{
    struct get_mail_info_msg *gmim = (struct get_mail_info_msg *) msg;
    mail_folder_info *mfi;

    LOCK_FOLDERS ();

    mfi = get_folder_info (gmim->uri);

    if (!(mfi->flags & MAIL_FIF_NAME_VALID)) {
        mfi->name = g_strdup (camel_folder_get_name (gmim->folder));
        mfi->flags |= MAIL_FIF_NAME_VALID;
    }

    mfi->unread = camel_folder_get_unread_message_count (gmim->folder);
    if (mfi->unread != -1)
        mfi->flags |= MAIL_FIF_UNREAD_VALID;

    mfi->total = camel_folder_get_message_count (gmim->folder);
    mfi->flags |= MAIL_FIF_TOTAL_VALID;

    UNLOCK_FOLDERS ();
}

static void
get_mail_info_reply (struct _mail_msg *msg)
{
    struct get_mail_info_msg *gmim = (struct get_mail_info_msg *) msg;
    mail_folder_info *mfi;

    LOCK_FOLDERS ();

    mfi = get_folder_info (gmim->uri);
    maybe_update (mfi);
    mfi->mail_info_id = 0;

    UNLOCK_FOLDERS ();
}

static void
get_mail_info_destroy (struct _mail_msg *msg)
{
    struct get_mail_info_msg *gmim = (struct get_mail_info_msg *) msg;

    camel_object_unref (CAMEL_OBJECT (gmim->folder));
    g_free (gmim->uri);
}

static mail_msg_op_t get_mail_info_op = {
    get_mail_info_describe,
    get_mail_info_receive,
    get_mail_info_reply,
    get_mail_info_destroy
};

static int
get_mail_info (CamelFolder *folder, const char *uri)
{
    struct get_mail_info_msg *gmim;
    int id;

    gmim = mail_msg_new (&get_mail_info_op, NULL, sizeof (*gmim));
    gmim->folder = folder;
    camel_object_ref (CAMEL_OBJECT (folder));
    gmim->uri = g_strdup (uri);

    id = gmim->msg.seq;
    e_thread_put (mail_thread_new, (EMsg *) gmim);
    return id;
}

/* Public functions */

void 
mail_folder_cache_set_update_estorage (const gchar *uri,
                       EvolutionStorage *estorage)
{
    mail_folder_info *mfi;

    g_return_if_fail (uri);

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    if (mfi->update_mode != MAIL_FIUM_UNKNOWN) {
        /* we could check to see that update_mode = ESTORAGE */
        /*g_warning ("folder cache: update mode already set??");*/
        UNLOCK_FOLDERS ();
        return;
    }

    d(g_message("Uri %s updates with EVOLUTION_STORAGE", uri));
    mfi->update_mode = MAIL_FIUM_EVOLUTION_STORAGE;
    mfi->update_info.es = estorage;

    UNLOCK_FOLDERS ();
}

void 
mail_folder_cache_set_update_lstorage (const gchar *uri,
                       GNOME_Evolution_Storage lstorage,
                       const gchar *path)
{
    mail_folder_info *mfi;

    g_return_if_fail (uri);

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    if (mfi->update_mode != MAIL_FIUM_UNKNOWN) {
        /*we could check to see that update_mode = lstorage */
        /*g_warning ("folder cache: update mode already set??");*/
        UNLOCK_FOLDERS ();
        return;
    }

    d(g_message("Uri %s updates with LOCAL_STORAGE", uri));
    /* Note that we don't dup the object or anything. Too lazy. */
    mfi->update_mode = MAIL_FIUM_LOCAL_STORAGE;
    mfi->update_info.ls = lstorage;

    mfi->path = g_strdup (path);
    mfi->flags |= MAIL_FIF_PATH_VALID;

    UNLOCK_FOLDERS ();
}

void
mail_folder_cache_remove_folder (const gchar *uri)
{
    mail_folder_info *mfi;
    GQuark uri_key;

    g_return_if_fail (uri);

    LOCK_FOLDERS ();
    
    mfi = g_hash_table_lookup (folders, uri);
    if (!mfi) {
        UNLOCK_FOLDERS ();
        g_warning ("folder cache: trying to remove uri \"%s\": not found in the cache",
               uri);
        return;
    }
    g_hash_table_remove (folders, uri);

    d(g_message ("folder cache: removing uri \"%s\".", uri));

    if (mfi->timeout_id)
        g_source_remove (mfi->timeout_id);

    if (mfi->mail_info_id)
        mail_msg_cancel (mfi->mail_info_id);

    uri_key = g_quark_from_string (uri);

    if (mfi->flags & MAIL_FIF_FB_VALID) {
        ESelectionModel *esm;

        esm = e_tree_get_selection_model (mfi->fb->message_list->tree);

        gtk_signal_disconnect_by_data (GTK_OBJECT (mfi->fb), GUINT_TO_POINTER (uri_key));
        gtk_signal_disconnect_by_data (GTK_OBJECT (mfi->fb->message_list), 
                           GUINT_TO_POINTER (uri_key));
        gtk_signal_disconnect_by_data (GTK_OBJECT (esm), GUINT_TO_POINTER (uri_key));
    }

    if (mfi->flags & MAIL_FIF_FOLDER_VALID) {
        camel_object_unhook_event (CAMEL_OBJECT (mfi->folder), "message_changed",
                       update_message_counts, GUINT_TO_POINTER (uri_key));
        camel_object_unhook_event (CAMEL_OBJECT (mfi->folder), "folder_changed",
                       update_message_counts, GUINT_TO_POINTER (uri_key));
        camel_object_unhook_event (CAMEL_OBJECT (mfi->folder), "finalize",
                       camel_folder_finalized, GUINT_TO_POINTER (uri_key));
    }

    UNLOCK_FOLDERS ();

    g_free (mfi->uri);
    g_free (mfi->path);
    g_free (mfi->name);
    g_free (mfi);
}

void
mail_folder_cache_note_folder (const gchar *uri, CamelFolder *folder)
{
    mail_folder_info *mfi;
    GQuark uri_key;

    g_return_if_fail (uri);
    g_return_if_fail (CAMEL_IS_FOLDER (folder));

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    if (mfi->flags & MAIL_FIF_FOLDER_VALID) {
        if (mfi->folder != folder)
            g_warning ("folder cache: CamelFolder being changed for %s??? I refuse.", uri);
        UNLOCK_FOLDERS ();
        return;
    }

    d(g_message("Setting uri %s to watch folder %p", uri, folder));

    mfi->flags |= MAIL_FIF_FOLDER_VALID;
    mfi->folder = folder;
    
    if (mfi->mail_info_id == 0)
        mfi->mail_info_id = get_mail_info (folder, uri);
    
    UNLOCK_FOLDERS ();

    uri_key = g_quark_from_string (uri);
    camel_object_hook_event (CAMEL_OBJECT (folder), "message_changed",
                 update_message_counts, GUINT_TO_POINTER (uri_key));
    camel_object_hook_event (CAMEL_OBJECT (folder), "folder_changed",
                 update_message_counts, GUINT_TO_POINTER (uri_key));
    camel_object_hook_event (CAMEL_OBJECT (folder), "finalize",
                 camel_folder_finalized, GUINT_TO_POINTER (uri_key));

}

void 
mail_folder_cache_note_fb (const gchar *uri, FolderBrowser *fb)
{
    mail_folder_info *mfi;
    GQuark uri_key;

    g_return_if_fail (uri);
    g_return_if_fail (IS_FOLDER_BROWSER (fb));

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    if (!(mfi->flags & MAIL_FIF_FOLDER_VALID)) {
        d(g_message("No folder specified so ignoring NOTE_FB at %s", uri));
        UNLOCK_FOLDERS ();
        return;
    }

    d(g_message("Noting folder browser %p for %s", fb, uri));

    mfi->fb = fb;
    mfi->flags |= MAIL_FIF_FB_VALID;

    uri_key = g_quark_from_string (uri);
    gtk_signal_connect (GTK_OBJECT (fb->message_list), "message_list_built",
                message_list_built, GUINT_TO_POINTER (uri_key));
    gtk_signal_connect (GTK_OBJECT (e_tree_get_selection_model (fb->message_list->tree)),
                "selection_changed", selection_changed, GUINT_TO_POINTER (uri_key));
    gtk_signal_connect (GTK_OBJECT (fb), "destroy", 
                folder_browser_destroyed, GUINT_TO_POINTER (uri_key));

    UNLOCK_FOLDERS ();

    d(g_message("-> faking message_list_built"));
    message_list_built (fb->message_list, GUINT_TO_POINTER (uri_key));
}

void 
mail_folder_cache_note_folderinfo (const gchar *uri, CamelFolderInfo *fi)
{
    mail_folder_info *mfi;

    g_return_if_fail (uri);
    g_return_if_fail (fi);

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    d(g_message("Noting folderinfo %p for %s", fi, uri));

    if (fi->unread_message_count != -1) {
        mfi->unread = fi->unread_message_count;
        mfi->flags |= MAIL_FIF_UNREAD_VALID;
    }

    if (!(mfi->flags & MAIL_FIF_NAME_VALID)) {
        d(g_message("-> setting name %s", fi->name));
        mfi->name = g_strdup (fi->name);
        mfi->flags |= MAIL_FIF_NAME_VALID;
    }

    UNLOCK_FOLDERS ();

    maybe_update (mfi);
}

void 
mail_folder_cache_note_name (const gchar *uri, const gchar *name)
{
    mail_folder_info *mfi;

    g_return_if_fail (uri);
    g_return_if_fail (name);

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    d(g_message("Noting name %s for %s", name, uri));

    if (mfi->flags & MAIL_FIF_NAME_VALID) {
        /* we could complain.. */
        d(g_message("-> name already set: %s", mfi->name));
        UNLOCK_FOLDERS ();
        return;
    }

    mfi->name = g_strdup (name);
    mfi->flags |= MAIL_FIF_NAME_VALID;

    UNLOCK_FOLDERS ();

    maybe_update (mfi);
}

CamelFolder *
mail_folder_cache_try_folder (const gchar *uri)
{
    mail_folder_info *mfi;
    CamelFolder *ret;

    g_return_val_if_fail (uri, NULL);

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    if (mfi->flags & MAIL_FIF_FOLDER_VALID)
        ret = mfi->folder;
    else
        ret = NULL;

    UNLOCK_FOLDERS ();

    return ret;
}

gchar *
mail_folder_cache_try_name (const gchar *uri)
{
    mail_folder_info *mfi;
    gchar *ret;

    g_return_val_if_fail (uri, NULL);

    LOCK_FOLDERS ();

    mfi = get_folder_info (uri);

    if (mfi->flags & MAIL_FIF_NAME_VALID)
        ret = g_strdup (mfi->name);
    else
        ret = NULL;

    UNLOCK_FOLDERS ();

    return ret;
}

void
mail_folder_cache_set_shell_view (GNOME_Evolution_ShellView sv)
{
    CORBA_Environment ev;

    g_return_if_fail (sv != CORBA_OBJECT_NIL);

    CORBA_exception_init (&ev);

    if (shell_view != CORBA_OBJECT_NIL)
        CORBA_Object_release (shell_view, &ev);

    if (BONOBO_EX (&ev))
        g_warning ("Exception in releasing old shell view: %s",
               bonobo_exception_get_text (&ev));
    CORBA_exception_free (&ev);

    shell_view = CORBA_Object_duplicate (sv, &ev);
    if (BONOBO_EX (&ev))
        g_warning ("Exception in duping new shell view: %s",
               bonobo_exception_get_text (&ev));
    CORBA_exception_free (&ev);
}
        
void
mail_folder_cache_set_folder_browser (FolderBrowser *fb)
{
    d(g_message("Setting new folder browser: %p", fb));

    if (folder_browser != NULL) {
        d(g_message("Unreffing old folder browser %p", folder_browser));
        gtk_object_unref (GTK_OBJECT (folder_browser));
    }

    folder_browser = fb;

    if (fb) {
        d(g_message("Reffing new browser %p", fb));
        gtk_object_ref (GTK_OBJECT (fb));

        LOCK_FOLDERS ();
        d(g_message("Checking folders for this fb"));
        g_hash_table_foreach (folders, check_for_fb_match, fb);
        UNLOCK_FOLDERS ();
    } else if (shell_view != CORBA_OBJECT_NIL) {
        CORBA_Environment ev;

        CORBA_exception_init (&ev);
        GNOME_Evolution_ShellView_setFolderBarLabel (shell_view,
                                 "",
                                 &ev);
        if (BONOBO_EX (&ev))
            g_warning ("Exception in folder bar label clear: %s",
                   bonobo_exception_get_text (&ev));
        CORBA_exception_free (&ev);
    }
}
        
#if d(!)0
#include <stdio.h>

static void
print_item (gpointer key, gpointer value, gpointer user_data)
{
    gchar *uri = key;
    mail_folder_info *mfi = value;

    printf ("* %s\n", uri);

    if (mfi->flags & MAIL_FIF_PATH_VALID)
        printf ("         Path: %s\n", mfi->path);
    if (mfi->flags & MAIL_FIF_NAME_VALID)
        printf ("         Name: %s\n", mfi->name);
    if (mfi->flags & MAIL_FIF_FOLDER_VALID)
        printf ("       Folder: %p\n", mfi->folder);
    if (mfi->flags & MAIL_FIF_UNREAD_VALID)
        printf ("       Unread: %d\n", mfi->unread);
    if (mfi->flags & MAIL_FIF_HIDDEN_VALID)
        printf ("       Hidden: %d\n", mfi->hidden);
    if (mfi->flags & MAIL_FIF_TOTAL_VALID)
        printf ("        Total: %d\n", mfi->total);
    if (mfi->flags & MAIL_FIF_NEED_UPDATE)
        printf ("       Needs an update\n");
    switch (mfi->update_mode) {
    case MAIL_FIUM_UNKNOWN:
        printf ("       Update mode: UNKNOWN\n");
        break;
    case MAIL_FIUM_EVOLUTION_STORAGE:
        printf ("       Update mode: Evolution\n");
        break;
    case MAIL_FIUM_LOCAL_STORAGE:
        printf ("       Update mode: Local\n");
        break;
/*
    case MAIL_FIUM_SHELL_VIEW:
        printf ("       Update mode: Shell View\n");
        break;
*/
    }

    printf ("\n");
}
        
void mail_folder_cache_dump_cache (void);

void
mail_folder_cache_dump_cache (void)
{
    printf ("********** MAIL FOLDER CACHE DUMP ************\n\n");
    LOCK_FOLDERS ();
    g_hash_table_foreach (folders, print_item, NULL);
    UNLOCK_FOLDERS ();
    printf ("********** END OF CACHE DUMP. ****************\n");
}

#endif