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/*
 * e-mail-account-tree-view.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.
 *
 * 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 Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "e-mail-account-tree-view.h"

#include <config.h>
#include <glib/gi18n-lib.h>

#define E_MAIL_ACCOUNT_TREE_VIEW_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_MAIL_ACCOUNT_TREE_VIEW, EMailAccountTreeViewPrivate))

struct _EMailAccountTreeViewPrivate {
    gint placeholder;
};

enum {
    ENABLE,
    DISABLE,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL];

G_DEFINE_TYPE (
    EMailAccountTreeView,
    e_mail_account_tree_view,
    GTK_TYPE_TREE_VIEW)

static void
mail_account_tree_view_enabled_toggled_cb (GtkCellRendererToggle *cell_renderer,
                                           const gchar *path_string,
                                           EMailAccountTreeView *tree_view)
{
    GtkTreeSelection *selection;
    GtkTreePath *path;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));

    /* Change the selection first so we act on the correct service. */
    path = gtk_tree_path_new_from_string (path_string);
    gtk_tree_selection_select_path (selection, path);
    gtk_tree_path_free (path);

    if (gtk_cell_renderer_toggle_get_active (cell_renderer))
        g_signal_emit (tree_view, signals[DISABLE], 0);
    else
        g_signal_emit (tree_view, signals[ENABLE], 0);
}

static void
mail_account_tree_view_constructed (GObject *object)
{
    GtkTreeView *tree_view;
    GtkTreeViewColumn *column;
    GtkCellRenderer *cell_renderer;

    /* Chain up to parent's constructed() method. */
    G_OBJECT_CLASS (e_mail_account_tree_view_parent_class)->
        constructed (object);

    tree_view = GTK_TREE_VIEW (object);

    gtk_tree_view_set_reorderable (tree_view, TRUE);

    /* Column: Enabled */

    column = gtk_tree_view_column_new ();
    gtk_tree_view_column_set_expand (column, FALSE);
    gtk_tree_view_column_set_title (column, _("Enabled"));

    cell_renderer = gtk_cell_renderer_toggle_new ();
    gtk_tree_view_column_pack_start (column, cell_renderer, TRUE);

    g_signal_connect (
        cell_renderer, "toggled",
        G_CALLBACK (mail_account_tree_view_enabled_toggled_cb),
        tree_view);

    gtk_tree_view_column_add_attribute (
        column, cell_renderer, "active",
        E_MAIL_ACCOUNT_STORE_COLUMN_ENABLED);

    gtk_tree_view_column_add_attribute (
        column, cell_renderer, "visible",
        E_MAIL_ACCOUNT_STORE_COLUMN_ENABLED_VISIBLE);

    gtk_tree_view_append_column (tree_view, column);

    /* Column: Account Name */

    column = gtk_tree_view_column_new ();
    gtk_tree_view_column_set_expand (column, TRUE);
    gtk_tree_view_column_set_title (column, _("Account Name"));

    cell_renderer = gtk_cell_renderer_pixbuf_new ();
    g_object_set (cell_renderer, "stock-size", GTK_ICON_SIZE_MENU, NULL);
    gtk_tree_view_column_pack_start (column, cell_renderer, FALSE);

    gtk_tree_view_column_add_attribute (
        column, cell_renderer, "icon-name",
        E_MAIL_ACCOUNT_STORE_COLUMN_ICON_NAME);

    gtk_tree_view_column_add_attribute (
        column, cell_renderer, "visible",
        E_MAIL_ACCOUNT_STORE_COLUMN_ONLINE_ACCOUNT);

    cell_renderer = gtk_cell_renderer_text_new ();
    g_object_set (cell_renderer, "ellipsize", PANGO_ELLIPSIZE_END, NULL);
    gtk_tree_view_column_pack_start (column, cell_renderer, FALSE);

    gtk_tree_view_column_add_attribute (
        column, cell_renderer, "text",
        E_MAIL_ACCOUNT_STORE_COLUMN_DISPLAY_NAME);

    /* This renderer is just an empty space filler. */
    cell_renderer = gtk_cell_renderer_pixbuf_new ();
    gtk_tree_view_column_pack_start (column, cell_renderer, TRUE);

    cell_renderer = gtk_cell_renderer_text_new ();
    g_object_set (cell_renderer, "text", _("Default"), NULL);
    gtk_tree_view_column_pack_end (column, cell_renderer, FALSE);

    gtk_tree_view_column_add_attribute (
        column, cell_renderer, "visible",
        E_MAIL_ACCOUNT_STORE_COLUMN_DEFAULT);

    cell_renderer = gtk_cell_renderer_pixbuf_new ();
    g_object_set (
        cell_renderer, "icon-name", "emblem-default",
        "stock-size", GTK_ICON_SIZE_MENU, NULL);
    gtk_tree_view_column_pack_end (column, cell_renderer, FALSE);

    gtk_tree_view_column_add_attribute (
        column, cell_renderer, "visible",
        E_MAIL_ACCOUNT_STORE_COLUMN_DEFAULT);

    gtk_tree_view_append_column (tree_view, column);

    /* Column: Type */

    column = gtk_tree_view_column_new ();
    gtk_tree_view_column_set_expand (column, FALSE);
    gtk_tree_view_column_set_title (column, _("Type"));

    cell_renderer = gtk_cell_renderer_text_new ();
    gtk_tree_view_column_pack_start (column, cell_renderer, TRUE);

    gtk_tree_view_column_add_attribute (
        column, cell_renderer, "text",
        E_MAIL_ACCOUNT_STORE_COLUMN_BACKEND_NAME);

    gtk_tree_view_append_column (tree_view, column);
}

static void
mail_account_tree_view_drag_end (GtkWidget *widget,
                                 GdkDragContext *context)
{
    GtkTreeModel *tree_model;

    /* Chain up to parent's drag_end() method. */
    GTK_WIDGET_CLASS (e_mail_account_tree_view_parent_class)->
        drag_end (widget, context);

    tree_model = gtk_tree_view_get_model (GTK_TREE_VIEW (widget));
    g_return_if_fail (E_IS_MAIL_ACCOUNT_STORE (tree_model));

    g_signal_emit_by_name (tree_model, "services-reordered", FALSE);
}

static void
e_mail_account_tree_view_class_init (EMailAccountTreeViewClass *class)
{
    GObjectClass *object_class;
    GtkWidgetClass *widget_class;

    g_type_class_add_private (class, sizeof (EMailAccountTreeViewPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->constructed = mail_account_tree_view_constructed;

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->drag_end = mail_account_tree_view_drag_end;

    signals[ENABLE] = g_signal_new (
        "enable",
        G_TYPE_FROM_CLASS (class),
        G_SIGNAL_RUN_LAST,
        G_STRUCT_OFFSET (EMailAccountTreeViewClass, enable),
        NULL, NULL,
        g_cclosure_marshal_VOID__VOID,
        G_TYPE_NONE, 0);

    signals[DISABLE] = g_signal_new (
        "disable",
        G_TYPE_FROM_CLASS (class),
        G_SIGNAL_RUN_LAST,
        G_STRUCT_OFFSET (EMailAccountTreeViewClass, disable),
        NULL, NULL,
        g_cclosure_marshal_VOID__VOID,
        G_TYPE_NONE, 0);
}

static void
e_mail_account_tree_view_init (EMailAccountTreeView *tree_view)
{
    tree_view->priv = E_MAIL_ACCOUNT_TREE_VIEW_GET_PRIVATE (tree_view);
}

GtkWidget *
e_mail_account_tree_view_new (EMailAccountStore *store)
{
    g_return_val_if_fail (E_IS_MAIL_ACCOUNT_STORE (store), NULL);

    return g_object_new (
        E_TYPE_MAIL_ACCOUNT_TREE_VIEW,
        "model", store, NULL);
}

CamelService *
e_mail_account_tree_view_get_selected_service (EMailAccountTreeView *tree_view)
{
    GtkTreeSelection *selection;
    GtkTreeModel *tree_model;
    GtkTreeIter iter;
    CamelService *service;
    GValue value = G_VALUE_INIT;
    gint column;

    g_return_val_if_fail (E_IS_MAIL_ACCOUNT_TREE_VIEW (tree_view), NULL);

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));

    if (!gtk_tree_selection_get_selected (selection, &tree_model, &iter))
        return NULL;

    /* By convention, "get" functions don't return a new object
     * reference, so use gtk_tree_model_get_value() to avoid it.
     * The caller can always reference the object if needed. */

    column = E_MAIL_ACCOUNT_STORE_COLUMN_SERVICE;
    gtk_tree_model_get_value (tree_model, &iter, column, &value);
    service = g_value_get_object (&value);
    g_value_unset (&value);

    g_warn_if_fail (CAMEL_IS_SERVICE (service));

    return service;
}

void
e_mail_account_tree_view_set_selected_service (EMailAccountTreeView *tree_view,
                                               CamelService *service)
{
    GtkTreeSelection *selection;
    GtkTreeModel *tree_model;
    GtkTreeIter iter;
    gboolean iter_set;

    g_return_if_fail (E_IS_MAIL_ACCOUNT_TREE_VIEW (tree_view));
    g_return_if_fail (CAMEL_IS_SERVICE (service));

    tree_model = gtk_tree_view_get_model (GTK_TREE_VIEW (tree_view));
    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));

    iter_set = gtk_tree_model_get_iter_first (tree_model, &iter);

    while (iter_set) {
        GValue value = G_VALUE_INIT;
        CamelService *candidate;
        gint column;

        column = E_MAIL_ACCOUNT_STORE_COLUMN_SERVICE;
        gtk_tree_model_get_value (tree_model, &iter, column, &value);
        candidate = g_value_get_object (&value);
        g_value_unset (&value);

        g_warn_if_fail (CAMEL_IS_SERVICE (candidate));

        if (service == candidate) {
            gtk_tree_selection_select_iter (selection, &iter);
            break;
        }

        iter_set = gtk_tree_model_iter_next (tree_model, &iter);
    }
}