path: root/widgets/misc/e-account-combo-box.c

/*
 * e-account-combo-box.c
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "e-account-combo-box.h"

#include <string.h>

#define E_ACCOUNT_COMBO_BOX_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_ACCOUNT_COMBO_BOX, EAccountComboBoxPrivate))

enum {
    COLUMN_STRING,
    COLUMN_ACCOUNT
};

enum {
    REFRESHED,
    LAST_SIGNAL
};

struct _EAccountComboBoxPrivate {
    EAccountList *account_list;
    GHashTable *index;
    gint num_displayed_accounts;
};

static CamelSession *camel_session;
static guint signal_ids[LAST_SIGNAL];

G_DEFINE_TYPE (
    EAccountComboBox,
    e_account_combo_box,
    GTK_TYPE_COMBO_BOX)

static gboolean
account_combo_box_has_dupes (GList *list,
                             const gchar *address)
{
    GList *iter;
    guint count = 0;

    /* Look for duplicates of the given email address. */
    for (iter = list; iter != NULL; iter = iter->next) {
        EAccount *account = iter->data;

        if (g_ascii_strcasecmp (account->id->address, address) == 0)
            count++;
    }

    return (count > 1);
}

static EAccount *
account_combo_box_choose_account (EAccountComboBox *combo_box)
{
    EAccountList *account_list;
    EAccount *account;
    GtkTreeModel *model;
    GtkTreeIter iter;

    account_list = e_account_combo_box_get_account_list (combo_box);
    g_return_val_if_fail (account_list != NULL, NULL);

    /* First try the default account. */

    /* XXX EAccountList misuses const. */
    account = (EAccount *)
        e_account_list_get_default (account_list);

    /* If there is no default account, give up. */
    if (account == NULL)
        return NULL;

    /* Make sure the default account appears in the combo box. */
    if (g_hash_table_lookup (combo_box->priv->index, account) != NULL)
        return account;

    /* Default account is disabled or otherwise unusable,
     * so fall back to the first account in the combo box. */

    model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));

    if (!gtk_tree_model_get_iter_first (model, &iter))
        return NULL;

    gtk_tree_model_get (model, &iter, COLUMN_ACCOUNT, &account, -1);

    return account;
}

static gboolean
account_combo_box_test_account (EAccount *account)
{
    CamelStore *store;
    const gchar *url;
    gboolean writable = FALSE;

    /* Account must be enabled. */
    if (!account->enabled)
        return FALSE;

    /* Account must have a non-empty email address. */
    if (account->id->address == NULL || *account->id->address == '\0')
        return FALSE;

    /* XXX Not sure I understand this part. */
    if (account->parent_uid == NULL)
        return TRUE;

    /* Account must be writable. */
    url = e_account_get_string (account, E_ACCOUNT_SOURCE_URL);
    store = CAMEL_STORE (camel_session_get_service (
        camel_session, url, CAMEL_PROVIDER_STORE, NULL));
    if (store != NULL) {
        writable = (store->mode & CAMEL_STORE_WRITE);
        g_object_unref (store);
    }

    return writable;
}

static void
account_combo_box_refresh_cb (EAccountList *account_list,
                              EAccount *unused,
                              EAccountComboBox *combo_box)
{
    GtkListStore *store;
    GtkTreeModel *model;
    EIterator *account_iter;
    EAccount *account;
    GHashTable *index;
    GList *list = NULL;
    GList *iter;

    combo_box->priv->num_displayed_accounts = 0;

    store = gtk_list_store_new (2, G_TYPE_STRING, E_TYPE_ACCOUNT);
    model = GTK_TREE_MODEL (store);
    index = combo_box->priv->index;

    g_hash_table_remove_all (index);

    if (account_list == NULL)
        goto skip;

    /* Build a list of EAccounts to display. */
    account_iter = e_list_get_iterator (E_LIST (account_list));
    while (e_iterator_is_valid (account_iter)) {
        EAccount *account;

        /* XXX EIterator misuses const. */
        account = (EAccount *) e_iterator_get (account_iter);
        if (account_combo_box_test_account (account))
            list = g_list_prepend (list, account);
        e_iterator_next (account_iter);
    }
    g_object_unref (account_iter);

    list = g_list_reverse (list);

    /* Populate the list store and index. */
    for (iter = list; iter != NULL; iter = iter->next) {
        GtkTreeRowReference *reference;
        GtkTreeIter tree_iter;
        GtkTreePath *path;
        gchar *string;

        account = iter->data;
        combo_box->priv->num_displayed_accounts++;

        /* Show the account name for duplicate email addresses. */
        if (account_combo_box_has_dupes (list, account->id->address))
            string = g_strdup_printf (
                "%s <%s> (%s)",
                account->id->name,
                account->id->address,
                account->name);
        else
            string = g_strdup_printf (
                "%s <%s>",
                account->id->name,
                account->id->address);

        gtk_list_store_append (store, &tree_iter);
        gtk_list_store_set (
            store, &tree_iter,
            COLUMN_STRING, string,
            COLUMN_ACCOUNT, account, -1);

        path = gtk_tree_model_get_path (model, &tree_iter);
        reference = gtk_tree_row_reference_new (model, path);
        g_hash_table_insert (index, account, reference);
        gtk_tree_path_free (path);

        g_free (string);
    }

    g_list_free (list);

skip:
    /* Restore the previously selected account. */
    account = e_account_combo_box_get_active (combo_box);
    if (account != NULL)
        g_object_ref (account);
    gtk_combo_box_set_model (GTK_COMBO_BOX (combo_box), model);
    e_account_combo_box_set_active (combo_box, account);
    if (account != NULL)
        g_object_unref (account);

    g_signal_emit (combo_box, signal_ids[REFRESHED], 0);
}

static GObject *
account_combo_box_constructor (GType type,
                               guint n_construct_properties,
                               GObjectConstructParam *construct_properties)
{
    GObject *object;
    GObjectClass *parent_class;
    GtkCellRenderer *renderer;

    /* Chain up to parent's constructor() method. */
    parent_class = G_OBJECT_CLASS (e_account_combo_box_parent_class);
    object = parent_class->constructor (
        type, n_construct_properties, construct_properties);

    renderer = gtk_cell_renderer_text_new ();

    gtk_cell_layout_pack_start (
        GTK_CELL_LAYOUT (object), renderer, TRUE);
    gtk_cell_layout_add_attribute (
        GTK_CELL_LAYOUT (object), renderer, "text", COLUMN_STRING);

    return object;
}

static void
account_combo_box_dispose (GObject *object)
{
    EAccountComboBoxPrivate *priv;

    priv = E_ACCOUNT_COMBO_BOX_GET_PRIVATE (object);

    if (priv->account_list != NULL) {
        g_signal_handlers_disconnect_by_func (
            priv->account_list,
            account_combo_box_refresh_cb, object);
        g_object_unref (priv->account_list);
        priv->account_list = NULL;
    }

    g_hash_table_remove_all (priv->index);

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (e_account_combo_box_parent_class)->dispose (object);
}

static void
account_combo_box_finalize (GObject *object)
{
    EAccountComboBoxPrivate *priv;

    priv = E_ACCOUNT_COMBO_BOX_GET_PRIVATE (object);

    g_hash_table_destroy (priv->index);

    /* Chain up to parent's finalize() method. */
    G_OBJECT_CLASS (e_account_combo_box_parent_class)->finalize (object);
}

static void
e_account_combo_box_class_init (EAccountComboBoxClass *class)
{
    GObjectClass *object_class;

    g_type_class_add_private (class, sizeof (EAccountComboBoxPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->constructor = account_combo_box_constructor;
    object_class->dispose = account_combo_box_dispose;
    object_class->finalize = account_combo_box_finalize;

    signal_ids[REFRESHED] = g_signal_new (
        "refreshed",
        G_TYPE_FROM_CLASS (class),
        G_SIGNAL_RUN_LAST,
        0, NULL, NULL,
        g_cclosure_marshal_VOID__VOID,
        G_TYPE_NONE, 0);
}

static void
e_account_combo_box_init (EAccountComboBox *combo_box)
{
    GHashTable *index;

    /* Reverse-lookup index */
    index = g_hash_table_new_full (
        g_direct_hash, g_direct_equal,
        (GDestroyNotify) g_object_unref,
        (GDestroyNotify) gtk_tree_row_reference_free);

    combo_box->priv = E_ACCOUNT_COMBO_BOX_GET_PRIVATE (combo_box);
    combo_box->priv->index = index;
}

GtkWidget *
e_account_combo_box_new (void)
{
    return g_object_new (E_TYPE_ACCOUNT_COMBO_BOX, NULL);
}

void
e_account_combo_box_set_session (CamelSession *session)
{
    /* XXX Really gross hack.
     *
     * We need a CamelSession to test whether a given EAccount is
     * writable.  The global CamelSession object is defined in the
     * mailer, but we're too far down the stack to access it.  So
     * we have to rely on someone passing us a reference to it.
     *
     * A much cleaner solution would be to store the writeability
     * of an account directly into the EAccount, but this would likely
     * require breaking ABI and all the fun that goes along with that.
     */

    camel_session = session;
}

EAccountList *
e_account_combo_box_get_account_list (EAccountComboBox *combo_box)
{
    g_return_val_if_fail (E_IS_ACCOUNT_COMBO_BOX (combo_box), NULL);

    return combo_box->priv->account_list;
}

void
e_account_combo_box_set_account_list (EAccountComboBox *combo_box,
                                      EAccountList *account_list)
{
    EAccountComboBoxPrivate *priv;

    g_return_if_fail (E_IS_ACCOUNT_COMBO_BOX (combo_box));

    if (account_list != NULL)
        g_return_if_fail (E_IS_ACCOUNT_LIST (account_list));

    priv = E_ACCOUNT_COMBO_BOX_GET_PRIVATE (combo_box);

    if (priv->account_list != NULL) {
        g_signal_handlers_disconnect_by_func (
            priv->account_list,
            account_combo_box_refresh_cb, combo_box);
        g_object_unref (priv->account_list);
        priv->account_list = NULL;
    }

    if (account_list != NULL) {
        priv->account_list = g_object_ref (account_list);

        /* Listen for changes to the account list. */
        g_signal_connect (
            priv->account_list, "account-added",
            G_CALLBACK (account_combo_box_refresh_cb), combo_box);
        g_signal_connect (
            priv->account_list, "account-changed",
            G_CALLBACK (account_combo_box_refresh_cb), combo_box);
        g_signal_connect (
            priv->account_list, "account-removed",
            G_CALLBACK (account_combo_box_refresh_cb), combo_box);
    }

    account_combo_box_refresh_cb (account_list, NULL, combo_box);
}

EAccount *
e_account_combo_box_get_active (EAccountComboBox *combo_box)
{
    EAccount *account;
    GtkTreeModel *model;
    GtkTreeIter iter;
    gboolean iter_set;

    g_return_val_if_fail (E_IS_ACCOUNT_COMBO_BOX (combo_box), NULL);

    iter_set = gtk_combo_box_get_active_iter (
        GTK_COMBO_BOX (combo_box), &iter);
    if (!iter_set)
        return NULL;

    model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
    gtk_tree_model_get (model, &iter, COLUMN_ACCOUNT, &account, -1);

    return account;
}

gboolean
e_account_combo_box_set_active (EAccountComboBox *combo_box,
                                EAccount *account)
{
    EAccountList *account_list;
    GtkTreeRowReference *reference;
    GtkTreeModel *model;
    GtkTreePath *path;
    GtkTreeIter iter;
    gboolean iter_set;

    g_return_val_if_fail (E_IS_ACCOUNT_COMBO_BOX (combo_box), FALSE);

    if (account != NULL)
        g_return_val_if_fail (E_IS_ACCOUNT (account), FALSE);

    account_list = combo_box->priv->account_list;
    g_return_val_if_fail (account_list != NULL, FALSE);

    /* NULL means choose an account ourselves. */
    if (account == NULL)
        account = account_combo_box_choose_account (combo_box);

    if (account == NULL)
        return FALSE;

    /* Lookup the tree row reference for the account. */
    reference = g_hash_table_lookup (combo_box->priv->index, account);
    if (reference == NULL)
        return FALSE;

    /* Convert the reference to a tree iterator. */
    path = gtk_tree_row_reference_get_path (reference);
    model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
    iter_set = gtk_tree_model_get_iter (model, &iter, path);
    gtk_tree_path_free (path);

    if (!iter_set)
        return FALSE;

    /* Activate the corresponding combo box item. */
    gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo_box), &iter);

    return TRUE;
}

const gchar *
e_account_combo_box_get_active_name (EAccountComboBox *combo_box)
{
    EAccount *account;

    g_return_val_if_fail (E_IS_ACCOUNT_COMBO_BOX (combo_box), NULL);

    account = e_account_combo_box_get_active (combo_box);
    return (account != NULL) ? account->name : NULL;
}

gboolean
e_account_combo_box_set_active_name (EAccountComboBox *combo_box,
                                     const gchar *account_name)
{
    EAccountList *account_list;
    EAccount *account;

    g_return_val_if_fail (E_IS_ACCOUNT_COMBO_BOX (combo_box), FALSE);

    account_list = combo_box->priv->account_list;
    g_return_val_if_fail (account_list != NULL, FALSE);

    /* XXX EAccountList misuses const. */
    account = (EAccount *) e_account_list_find (
        account_list, E_ACCOUNT_FIND_NAME, account_name);

    if (account == NULL)
        return FALSE;

    return e_account_combo_box_set_active (combo_box, account);
}

/**
 * e_account_combo_box_count_displayed_accounts:
 * @combo_box: an #EAccountComboBox
 *
 * Counts the number of accounts that are displayed in the @combo_box.  This may not
 * be the actual number of accounts that are configured, as some of those accounts
 * may be disabled by the user.
 *
 * Return value: number of active and valid accounts as shown in the @combo_box.
 */
gint
e_account_combo_box_count_displayed_accounts (EAccountComboBox *combo_box)
{
    g_return_val_if_fail (E_IS_ACCOUNT_COMBO_BOX (combo_box), -1);

    return combo_box->priv->num_displayed_accounts;
}