path: root/plugins/email-custom-header/email-custom-header.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/>
 *
 *
 * Authors:
 *      Ashish Shrivastava <shashish@novell.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h>
#include <glib/gi18n.h>
#include <gconf/gconf-client.h>
#include "mail/em-utils.h"
#include "mail/em-event.h"
#include "composer/e-msg-composer.h"
#include "libedataserver/e-account.h"
#include "e-util/e-config.h"
#include "e-util/e-util.h"
#include "email-custom-header.h"

#define d(x)
#define GCONF_KEY_CUSTOM_HEADER "/apps/evolution/eplugin/email_custom_header/customHeader"

typedef struct {
        GConfClient *gconf;
        GtkWidget   *treeview;
        GtkWidget   *header_add;
        GtkWidget   *header_edit;
        GtkWidget   *header_remove;
        GtkListStore *store;
} ConfigData;

enum {
        HEADER_KEY_COLUMN,
    HEADER_VALUE_COLUMN,
        HEADER_N_COLUMNS
};

struct _EmailCustomHeaderOptionsDialogPrivate {
    GtkBuilder *builder;
    /*Widgets*/
    GtkWidget *main;
    GtkWidget *page;
    GtkWidget *header_table;
    GtkWidget *header_type_name_label;
    GArray *combo_box_header_value;
    GArray *email_custom_header_details;
    GArray *header_index_type;
    gint flag;
    gchar *help_section;
};

/* epech - e-plugin email custom header*/
static void epech_dialog_class_init (GObjectClass *object_class);
static void epech_dialog_finalize (GObject *object);
static void epech_dialog_init (GObject *object);
static void epech_dialog_dispose (GObject *object);
static void epech_setup_widgets (CustomHeaderOptionsDialog *mch);
static gint epech_check_existing_composer_window(gconstpointer a, gconstpointer b);
static void commit_changes (ConfigData *cd);
gint e_plugin_lib_enable (EPlugin *ep, gint enable);
GtkWidget *e_plugin_lib_get_configure_widget (EPlugin *epl);
gboolean e_plugin_ui_init(GtkUIManager *ui_manager, EMsgComposer *composer);
GtkWidget *org_gnome_email_custom_header_config_option (struct _EPlugin *epl, struct _EConfigHookItemFactoryData *data);

gint
e_plugin_lib_enable (EPlugin *ep, gint enable)
{
        return 0;
}

static void
epech_get_widgets_data (CustomHeaderOptionsDialog *mch)
{
    EmailCustomHeaderOptionsDialogPrivate *priv;
    HeaderValueComboBox *sub_combo_box_get;
    gint selected_item;
    gint index_column;

    priv = mch->priv;
    priv->header_index_type = g_array_new (FALSE, FALSE, sizeof (gint));
    priv->flag++;

    for (index_column = 0;
        index_column < priv->email_custom_header_details->len; index_column++) {

        sub_combo_box_get = &g_array_index(priv->combo_box_header_value, HeaderValueComboBox,index_column);
        selected_item = gtk_combo_box_get_active((GtkComboBox *)sub_combo_box_get->header_value_combo_box);
        g_array_append_val (priv->header_index_type, selected_item);
    }
}

static gboolean
epech_get_widgets (CustomHeaderOptionsDialog *mch)
{
    EmailCustomHeaderOptionsDialogPrivate *priv;
    priv = mch->priv;

#define EMAIL_CUSTOM_HEADER(name) e_builder_get_widget (priv->builder, name)
    priv->main = EMAIL_CUSTOM_HEADER ("email-custom-header-dialog");

    if (!priv->main)
        return FALSE;

    priv->page  = EMAIL_CUSTOM_HEADER ("email-custom-header-vbox");
    priv->header_table = EMAIL_CUSTOM_HEADER ("email-custom-header-options");
#undef EMAIL_CUSTOM_HEADER

    return (priv->page
        &&priv->header_table);
}

static void
epech_fill_widgets_with_data (CustomHeaderOptionsDialog *mch)
{
    EmailCustomHeaderOptionsDialogPrivate *priv;
    HeaderValueComboBox *sub_combo_box_fill;
    gint set_index_column;

    priv = mch->priv;
    priv->help_section = g_strdup ("usage-mail");

    for (set_index_column = 0;
        set_index_column < priv->email_custom_header_details->len;set_index_column++) {
        sub_combo_box_fill = &g_array_index(priv->combo_box_header_value, HeaderValueComboBox,set_index_column);

        if (priv->flag == 0) {
            gtk_combo_box_set_active ((GtkComboBox *)sub_combo_box_fill->header_value_combo_box,0);
        } else {
            gtk_combo_box_set_active ((GtkComboBox *)sub_combo_box_fill->header_value_combo_box,
                g_array_index(priv->header_index_type, gint, set_index_column));
        }
    }
}

CustomHeaderOptionsDialog *
epech_dialog_new (void)
{
    CustomHeaderOptionsDialog *mch;

    mch = g_object_new (EMAIL_CUSTOM_HEADER_OPTIONS_DIALOG, NULL);

    return mch;
}

GType
epech_dialog_get_type (void)
{
    static GType type = 0;

    if (type == 0) {
        static const GTypeInfo info = {
            sizeof (CustomHeaderOptionsDialogClass),
            NULL,   /* base_init */
            NULL,   /* base_finalize */
            (GClassInitFunc) epech_dialog_class_init,   /* class_init */
            NULL,   /* class_finalize */
            NULL,   /* class_data */
            sizeof (CustomHeaderOptionsDialog),
            0,      /* n_preallocs */
            (GInstanceInitFunc) epech_dialog_init,
            NULL    /* instance_init */
        };
        type = g_type_register_static (G_TYPE_OBJECT,
                "CustomHeaderOptionsDialogType",
                &info, 0);
    }

    return type;
}

static void
epech_header_options_cb (GtkDialog *dialog, gint state, gpointer func_data)
{
    EmailCustomHeaderOptionsDialogPrivate *priv;
    CustomHeaderOptionsDialog *mch;

    mch = func_data;
    priv = mch->priv;

    switch (state) {
        case GTK_RESPONSE_OK:
            epech_get_widgets_data (mch);
        case GTK_RESPONSE_CANCEL:
            gtk_widget_hide (priv->main);
            gtk_widget_destroy (priv->main);
            g_object_unref (priv->builder);
            break;
        case GTK_RESPONSE_HELP:
            e_display_help (
                GTK_WINDOW (priv->main),
                priv->help_section);
            break;
    }

    g_signal_emit (G_OBJECT (func_data), signals[MCH_RESPONSE], 0, state);
}

static gboolean
epech_dialog_run (CustomHeaderOptionsDialog *mch, GtkWidget *parent)
{
    EmailCustomHeaderOptionsDialogPrivate *priv;
    GtkWidget *toplevel;

    g_return_val_if_fail (mch != NULL || EMAIL_CUSTOM_HEADER_OPTIONS_IS_DIALOG (mch), FALSE);
    priv = mch->priv;
    epech_get_header_list (mch);

    priv->builder = gtk_builder_new ();
    e_load_ui_builder_definition (
        priv->builder, "org-gnome-email-custom-header.ui");

    if (!epech_get_widgets(mch)) {
        g_object_unref (priv->builder);
        d (printf ("\n Could not get the Widgets\n"));
    }

    epech_setup_widgets (mch);
    toplevel =  gtk_widget_get_toplevel (priv->main);

    if (parent)
        gtk_window_set_transient_for (GTK_WINDOW (toplevel),GTK_WINDOW (parent));

    epech_fill_widgets_with_data (mch);
    g_signal_connect (GTK_DIALOG (priv->main), "response", G_CALLBACK(epech_header_options_cb), mch);
    gtk_widget_show (priv->main);

    return TRUE;
}

static void
epech_get_header_list (CustomHeaderOptionsDialog *mch)
{
    GConfClient *client;

    client = gconf_client_get_default ();
    g_return_if_fail (GCONF_IS_CLIENT (client));
    gconf_client_add_dir (client, GCONF_KEY_CUSTOM_HEADER, GCONF_CLIENT_PRELOAD_ONELEVEL, NULL);
    epech_load_from_gconf (client, "/apps/evolution/eplugin/email_custom_header/customHeader", mch);

    return;
}

static void
epech_load_from_gconf (GConfClient *client,const gchar *path,CustomHeaderOptionsDialog *mch)
{
    EmailCustomHeaderOptionsDialogPrivate *priv;
    EmailCustomHeaderDetails temp_header_details= {-1, -1, NULL, NULL};
    CustomSubHeader temp_header_value_details =  {NULL};
    GSList *header_list,*q;
    gchar *buffer;
    gint index,pos;

    priv = mch->priv;
    priv->email_custom_header_details = g_array_new (TRUE, TRUE, sizeof (EmailCustomHeaderDetails));
    header_list = gconf_client_get_list (client,path,GCONF_VALUE_STRING, NULL);

    for (q = header_list,pos = 0; q != NULL; q = q->next,pos++) {
        gchar **parse_header_list;

        memset(&temp_header_value_details,0,sizeof(CustomSubHeader));
        temp_header_details.sub_header_type_value = g_array_new (TRUE, TRUE, sizeof (CustomSubHeader));
        buffer = q->data;
        parse_header_list = g_strsplit_set (buffer, "=;,", -1);
        temp_header_details.header_type_value = g_string_new("");
        if (temp_header_details.header_type_value) {
            g_string_assign(temp_header_details.header_type_value, parse_header_list[0]);
        }

        for (index = 0; parse_header_list[index+1] ; ++index) {
            temp_header_value_details.sub_header_string_value = g_string_new("");

            if (temp_header_value_details.sub_header_string_value) {
                g_string_assign(temp_header_value_details.sub_header_string_value, parse_header_list[index+1]);
            }

            g_array_append_val(temp_header_details.sub_header_type_value, temp_header_value_details);
        }

        temp_header_details.number_of_subtype_header = index;
        g_array_append_val(priv->email_custom_header_details, temp_header_details);
    }

    temp_header_details.number_of_header = pos;
}

static void
epech_setup_widgets (CustomHeaderOptionsDialog *mch)
{
    EmailCustomHeaderOptionsDialogPrivate *priv;
    EmailCustomHeaderDetails *temp_header_ptr,*temp;
    CustomSubHeader *temp_header_value_ptr;
    HeaderValueComboBox sub_combo_box = {NULL};
    HeaderValueComboBox *sub_combo_box_ptr;
    gint sub_index,row_combo,column_combo;
    gint header_section_id,sub_type_index,row,column;
    gint i;
    gchar *str;
    static const gchar *security_field = N_("Security:");
    static struct _security_values {
        const gchar *value, *str;
    } security_values[] = {
        { "Personal", N_("Personal") } ,
        { "Unclassified", N_("Unclassified") },
        { "Protected", N_("Protected") },
        { "InConfidence", N_("Confidential") },
        { "Secret", N_("Secret") },
        { "Topsecret", N_("Top secret") },
        { NULL, NULL }
    };

    priv = mch->priv;
    priv->combo_box_header_value = g_array_new (TRUE, FALSE, sizeof (HeaderValueComboBox));

    for (header_section_id = 0,row = 0,column = 1;
        header_section_id < priv->email_custom_header_details->len; header_section_id++,row++,column++) {

        /* To create an empty label widget. Text will be added dynamically. */
        priv->header_type_name_label = gtk_label_new ("");
        temp_header_ptr = &g_array_index(priv->email_custom_header_details, EmailCustomHeaderDetails,header_section_id);
                str = (temp_header_ptr->header_type_value)->str;
                if (strcmp (str, security_field) == 0) {
            str = _(security_field);
                }
        gtk_label_set_markup (GTK_LABEL (priv->header_type_name_label), str);

        gtk_table_attach (GTK_TABLE (priv->header_table), priv->header_type_name_label, 0, 1, row, column,
            (GtkAttachOptions) (GTK_EXPAND | GTK_FILL),
            (GtkAttachOptions) (0), 0, 0);

        gtk_misc_set_alignment (GTK_MISC (priv->header_type_name_label), 0, 0.5);
        gtk_widget_show (priv->header_type_name_label);
        sub_combo_box.header_value_combo_box = gtk_combo_box_new_text ();
        g_array_append_val(priv->combo_box_header_value, sub_combo_box);
    }

    for (sub_index = 0,row_combo = 0,column_combo = 1; sub_index < priv->combo_box_header_value->len;
                sub_index++,row_combo++,column_combo++) {
        temp = &g_array_index(priv->email_custom_header_details, EmailCustomHeaderDetails,sub_index);

        sub_combo_box_ptr = &g_array_index(priv->combo_box_header_value, HeaderValueComboBox,sub_index);
        gtk_table_attach (GTK_TABLE (priv->header_table),
            sub_combo_box_ptr->header_value_combo_box, 1, 2, row_combo, column_combo,
            (GtkAttachOptions) (GTK_EXPAND | GTK_FILL),
            (GtkAttachOptions) (GTK_FILL), 0, 0);

        for (sub_type_index = 0; sub_type_index < temp->number_of_subtype_header; sub_type_index++) {
            temp_header_value_ptr = &g_array_index(temp->sub_header_type_value, CustomSubHeader,sub_type_index);
            str = (temp_header_value_ptr->sub_header_string_value)->str;
            for (i = 0; security_values[i].value != NULL; i++) {
                if (strcmp (str, security_values[i].value) == 0) {
                    str = _(security_values[i].str);
                    break;
                }
            }
            gtk_combo_box_append_text (GTK_COMBO_BOX (sub_combo_box_ptr->header_value_combo_box),
                str);
        }

        /* Translators: "None" as an email custom header option in a dialog invoked by Insert->Custom Header from Composer,
           indicating the header will not be added to a mail message */
        gtk_combo_box_append_text (GTK_COMBO_BOX (sub_combo_box_ptr->header_value_combo_box), C_("email-custom-header", "None"));
        gtk_widget_show (sub_combo_box_ptr->header_value_combo_box);
    }
}

static void
epech_dialog_class_init (GObjectClass *object)
{
    CustomHeaderOptionsDialogClass *klass;
    GObjectClass *object_class;

    klass = EMAIL_CUSTOM_HEADEROPTIONS_DIALOG_CLASS (object);
    parent_class = g_type_class_peek_parent (klass);
    object_class = G_OBJECT_CLASS (klass);

    object_class->finalize = epech_dialog_finalize;
    object_class->dispose = epech_dialog_dispose;

    signals[MCH_RESPONSE] = g_signal_new ("emch_response",
            G_TYPE_FROM_CLASS (klass),
            G_SIGNAL_RUN_FIRST,
            G_STRUCT_OFFSET (CustomHeaderOptionsDialogClass, emch_response),
            NULL, NULL,
            g_cclosure_marshal_VOID__INT,
            G_TYPE_NONE, 1,
            G_TYPE_INT);
}

static void
epech_dialog_init (GObject *object)
{
    CustomHeaderOptionsDialog *mch;
    EmailCustomHeaderOptionsDialogPrivate *priv;

    mch = EMAIL_CUSTOM_HEADEROPTIONS_DIALOG (object);
    priv = g_new0 (EmailCustomHeaderOptionsDialogPrivate, 1);
    mch->priv = priv;
    priv->builder = NULL;
    priv->main = NULL;
    priv->page = NULL;
    priv->header_table = NULL;
}

static void
epech_dialog_finalize (GObject *object)
{
    CustomHeaderOptionsDialog *mch = (CustomHeaderOptionsDialog *)object;
    EmailCustomHeaderOptionsDialogPrivate *priv;

    g_return_if_fail (EMAIL_CUSTOM_HEADER_OPTIONS_IS_DIALOG (mch));
    priv = mch->priv;
    g_free (priv->help_section);

    if (mch->priv) {
        g_free (mch->priv);
        mch->priv = NULL;
    }

    if (parent_class->finalize)
        (* parent_class->finalize) (object);
}

static void
epech_dialog_dispose (GObject *object)
{
    CustomHeaderOptionsDialog *mch = (CustomHeaderOptionsDialog *) object;

    g_return_if_fail (EMAIL_CUSTOM_HEADER_OPTIONS_IS_DIALOG (mch));

    if (parent_class->dispose)
        (* parent_class->dispose) (object);
}

static void
epech_append_to_custom_header (CustomHeaderOptionsDialog *dialog, gint state, gpointer data)
{
    EMsgComposer *composer;
    EmailCustomHeaderOptionsDialogPrivate *priv;
    EmailCustomHeaderDetails *temp_header_ptr;
    CustomSubHeader *temp_header_value_ptr;
    gint index_subtype,sub_type_index;

    composer = (EMsgComposer *)data;
    priv = dialog->priv;

    if (state == GTK_RESPONSE_OK) {

        for (index_subtype = 0; index_subtype < priv->email_custom_header_details->len; index_subtype++) {

            temp_header_ptr = &g_array_index(priv->email_custom_header_details, EmailCustomHeaderDetails,index_subtype);

            for (sub_type_index = 0; sub_type_index < temp_header_ptr->number_of_subtype_header; sub_type_index++) {
                temp_header_value_ptr = &g_array_index(temp_header_ptr->sub_header_type_value, CustomSubHeader,sub_type_index);

                if (sub_type_index == g_array_index(priv->header_index_type, gint, index_subtype)) {
                    e_msg_composer_modify_header (composer, (temp_header_ptr->header_type_value)->str,
                        (temp_header_value_ptr->sub_header_string_value)->str);
                }
            }
        }
    }
}

static void
epech_custom_header_options_commit (EMsgComposer *comp, gpointer user_data)
{
        EMsgComposer *composer;
        EmailCustomHeaderWindow *new_email_custom_header_window = NULL;
        CustomHeaderOptionsDialog *current_dialog = NULL;

        composer = (EMsgComposer *) user_data;

        if (!user_data || !EMAIL_CUSTOM_HEADER_OPTIONS_IS_DIALOG (user_data))
        return;

        new_email_custom_header_window = g_object_get_data ((GObject *) composer, "compowindow");

        if (new_email_custom_header_window) {
        current_dialog = new_email_custom_header_window->epech_dialog;
        }

        if (current_dialog) {
        g_free (current_dialog);
        current_dialog = NULL;
        }

    if (new_email_custom_header_window) {
        g_free (new_email_custom_header_window);
        new_email_custom_header_window = NULL;
    }
}

static gint
epech_check_existing_composer_window(gconstpointer compowindow, gconstpointer other_compowindow)
{
    if ((compowindow) && (other_compowindow)) {
        if (((EmailCustomHeaderWindow *)compowindow)->epech_window == (GdkWindow *)other_compowindow) {
            return 0;
        }
    }

    return -1;
}

static void
destroy_compo_data (gpointer data)
{
        EmailCustomHeaderWindow *compo_data = (EmailCustomHeaderWindow *) data;

        if (!compo_data)
                return;

        g_free (compo_data);
}

static void action_email_custom_header_cb (GtkAction *action, EMsgComposer *composer)

{
    GtkUIManager  *ui_manager;
    GtkWidget     *menuitem;
    CustomHeaderOptionsDialog *dialog = NULL;
    EmailCustomHeaderWindow *new_email_custom_header_window = NULL;

    ui_manager = gtkhtml_editor_get_ui_manager (GTKHTML_EDITOR (composer));
    menuitem = gtk_ui_manager_get_widget (ui_manager, "/main-menu/insert-menu/insert-menu-top/Custom Header");

    new_email_custom_header_window = g_object_get_data ((GObject *) composer, "compowindow");

    if (epech_check_existing_composer_window(new_email_custom_header_window,menuitem->window) == 0) {
        dialog = new_email_custom_header_window->epech_dialog;
    } else {
        dialog = epech_dialog_new ();
        if (dialog) {
                        EmailCustomHeaderWindow *new_email_custom_header_window;
                        new_email_custom_header_window = g_new0(EmailCustomHeaderWindow, 1);
                        new_email_custom_header_window->epech_window =  menuitem->window;
                        new_email_custom_header_window->epech_dialog = dialog;
                        g_object_set_data_full ((GObject *) composer, "compowindow", new_email_custom_header_window, destroy_compo_data);
        }
    }

    epech_dialog_run (dialog, GTK_WIDGET (composer));
    g_signal_connect (dialog, "emch_response", G_CALLBACK (epech_append_to_custom_header), GTK_WIDGET (composer));
    g_signal_connect (GTK_WIDGET (composer), "destroy", G_CALLBACK (epech_custom_header_options_commit), composer);
}

static GtkActionEntry entries[] = {

    { "Custom Header",
      NULL,
      N_("_Custom Header"),
      NULL,
      NULL,
      G_CALLBACK (action_email_custom_header_cb) }
};

gboolean
e_plugin_ui_init (GtkUIManager *ui_manager,
                  EMsgComposer *composer)
{
    GtkhtmlEditor *editor;

    editor = GTKHTML_EDITOR (composer);

    /* Add actions to the "composer" action group. */
    gtk_action_group_add_actions (
        gtkhtml_editor_get_action_group (editor, "composer"),
        entries, G_N_ELEMENTS (entries), composer);

    return TRUE;
}

static void
commit_changes (ConfigData *cd)
{
    GtkTreeModel *model = NULL;
    GSList *header_config_list = NULL;
    GtkTreeIter iter;
    gboolean valid;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (cd->treeview));
    valid = gtk_tree_model_get_iter_first (model, &iter);

    while (valid) {
        gchar *keyword = NULL, *value = NULL;

        gtk_tree_model_get (model, &iter,
            HEADER_KEY_COLUMN, &keyword,
            HEADER_VALUE_COLUMN, &value,
            -1);

                /* Check if the keyword is not empty */
                if ((keyword) && (g_utf8_strlen(g_strstrip(keyword), -1) > 0)) {
                        if ((value) && (g_utf8_strlen(g_strstrip(value), -1) > 0)) {
                                keyword = g_strconcat (keyword, "=", value, NULL);
                        }
                        header_config_list = g_slist_append (header_config_list, g_strdup(keyword));
                }

        g_free (keyword);
        g_free (value);

        valid = gtk_tree_model_iter_next (model, &iter);
    }

    gconf_client_set_list (cd->gconf, GCONF_KEY_CUSTOM_HEADER, GCONF_VALUE_STRING, header_config_list, NULL);

    g_slist_foreach (header_config_list, (GFunc) g_free, NULL);
    g_slist_free (header_config_list);
}

static void
header_isempty (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, ConfigData *cd)
{
    GtkTreeSelection *selection;
    gchar *keyword = NULL;
    gchar *value = NULL;
    gboolean valid;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (cd->treeview));
    /* move to the previous node */
    valid = gtk_tree_path_prev (path);

    gtk_tree_model_get (model, iter, HEADER_KEY_COLUMN, &keyword, -1);

    if ((keyword) && !(g_utf8_strlen (g_strstrip (keyword), -1) > 0))
        gtk_list_store_remove (cd->store, iter);

    /* Check if we have a valid row to select. If not, then select
     * the previous row */
    if (gtk_list_store_iter_is_valid (GTK_LIST_STORE (model), iter)) {
        gtk_tree_selection_select_iter (selection, iter);
    } else {
        if (path && valid) {
            gtk_tree_model_get_iter (model, iter, path);
            gtk_tree_selection_select_iter (selection, iter);
        }
    }

    gtk_widget_grab_focus (cd->treeview);
    g_free (keyword);
    g_free (value);
}

static gboolean
header_foreach_check_isempty (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, ConfigData *cd)
{
    gboolean valid;

    valid = gtk_tree_model_get_iter_first (model, iter);
    while (valid && gtk_list_store_iter_is_valid (cd->store, iter)) {
        gchar *keyword = NULL;
        gchar *value = NULL;
        gtk_tree_model_get (model, iter, HEADER_KEY_COLUMN, &keyword, -1);
        /* Check if the keyword is not empty and then emit the row-changed
        signal (if we delete the row, then the iter gets corrupted) */
        if ((keyword) && !(g_utf8_strlen (g_strstrip (keyword), -1) > 0))
            gtk_tree_model_row_changed (model, path, iter);
        else {
            gtk_tree_model_get (model, iter, HEADER_VALUE_COLUMN, &value, -1);
            /* Check if the keyword is not empty and then emit the row-changed
            signal (if we delete the row, then the iter gets corrupted) */
            if ((value) && !(g_utf8_strlen (g_strstrip (value), -1) > 0))
                gtk_tree_model_row_changed (model, path, iter);
        }

        g_free (keyword);
                g_free (value);

        valid = gtk_tree_model_iter_next (model, iter);
    }

    return FALSE;
}

static void
cell_edited_callback (GtkCellRendererText *cell,
              gchar               *path_string,
              gchar               *new_text,
              ConfigData             *cd)
{
    GtkTreeModel *model;
    GtkTreeIter iter;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (cd->treeview));

    gtk_tree_model_get_iter_from_string (model, &iter, path_string);

    gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                    HEADER_KEY_COLUMN, new_text, -1);

    commit_changes (cd);
}

static void
cell_value_edited_callback (GtkCellRendererText *cell,
                      gchar               *path_string,
                      gchar               *new_text,
                      ConfigData          *cd)
{
        GtkTreeModel *model;
        GtkTreeIter iter;

        model = gtk_tree_view_get_model (GTK_TREE_VIEW (cd->treeview));

        gtk_tree_model_get_iter_from_string (model, &iter, path_string);

        gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                    HEADER_VALUE_COLUMN, new_text, -1);

        commit_changes (cd);
}

static void
header_add_clicked (GtkButton *button, ConfigData *cd)
{
    GtkTreeModel *model;
    GtkTreeIter iter;
    GtkTreeViewColumn *focus_col;
    GtkTreePath *path;

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (cd->treeview));
    gtk_tree_model_foreach (model, (GtkTreeModelForeachFunc) header_foreach_check_isempty, cd);

    /* Disconnect from signal so that we can create an empty row */
    g_signal_handlers_disconnect_matched(G_OBJECT(model), G_SIGNAL_MATCH_FUNC, 0, 0, NULL, header_isempty, cd);

    gtk_list_store_append (GTK_LIST_STORE (model), &iter);
    gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                HEADER_KEY_COLUMN, "", -1);
    gtk_list_store_set (GTK_LIST_STORE (model), &iter,
                HEADER_VALUE_COLUMN, "", -1);

    focus_col = gtk_tree_view_get_column (GTK_TREE_VIEW (cd->treeview), HEADER_KEY_COLUMN);
    path = gtk_tree_model_get_path (model, &iter);

    if (path) {
        gtk_tree_view_set_cursor (GTK_TREE_VIEW (cd->treeview), path, focus_col, TRUE);
        gtk_tree_view_row_activated(GTK_TREE_VIEW(cd->treeview), path, focus_col);
        gtk_tree_path_free (path);
    }

    /* We have done our job, connect back to the signal */
    g_signal_connect(G_OBJECT(model), "row-changed", G_CALLBACK(header_isempty), cd);
}

static void
header_remove_clicked (GtkButton *button, ConfigData *cd)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter;
    GtkTreePath *path;
    gboolean valid;
    gint len;

    valid = FALSE;
    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (cd->treeview));
    if (!gtk_tree_selection_get_selected (selection, &model, &iter))
        return;

    /* Get the path and move to the previous node :) */
    path = gtk_tree_model_get_path (model, &iter);
    if (path)
        valid = gtk_tree_path_prev(path);

    gtk_list_store_remove (GTK_LIST_STORE (model), &iter);

    len = gtk_tree_model_iter_n_children (model, NULL);
    if (len > 0) {
        if (gtk_list_store_iter_is_valid (GTK_LIST_STORE(model), &iter)) {
            gtk_tree_selection_select_iter (selection, &iter);
        } else {
            if (path && valid) {
                gtk_tree_model_get_iter(model, &iter, path);
                gtk_tree_selection_select_iter (selection, &iter);
            }
        }
    } else {
        gtk_widget_set_sensitive (cd->header_edit, FALSE);
        gtk_widget_set_sensitive (cd->header_remove, FALSE);
    }

    gtk_widget_grab_focus(cd->treeview);
    gtk_tree_path_free (path);

    commit_changes (cd);
}

static void
header_edit_clicked (GtkButton *button, ConfigData *cd)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreePath *path;
    GtkTreeIter iter;
    GtkTreeViewColumn *focus_col;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (cd->treeview));
    if (!gtk_tree_selection_get_selected (selection, &model, &iter))
        return;

    focus_col = gtk_tree_view_get_column (GTK_TREE_VIEW (cd->treeview), HEADER_KEY_COLUMN);
    path = gtk_tree_model_get_path (model, &iter);

    if (path) {
        gtk_tree_view_set_cursor (GTK_TREE_VIEW (cd->treeview), path, focus_col, TRUE);
        gtk_tree_path_free (path);
    }
}

static void
selection_changed (GtkTreeSelection *selection, ConfigData *cd)
{
    GtkTreeModel *model;
    GtkTreeIter iter;

    if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
        gtk_widget_set_sensitive (cd->header_edit, TRUE);
        gtk_widget_set_sensitive (cd->header_remove, TRUE);
    } else {
        gtk_widget_set_sensitive (cd->header_edit, FALSE);
        gtk_widget_set_sensitive (cd->header_remove, FALSE);
    }
}

static void
destroy_cd_data (gpointer data)
{
    ConfigData *cd = (ConfigData *) data;

    if (!cd)
        return;

    g_object_unref (cd->gconf);
    g_free (cd);
}

GtkWidget *
e_plugin_lib_get_configure_widget (EPlugin *epl)
{
    GtkCellRenderer *renderer;
    GtkTreeSelection *selection;
    GtkTreeIter iter;
    GtkWidget *hbox;
    GSList *list;
    GSList *header_list = NULL;
    GtkTreeModel *model;
    gint index;
        gchar *buffer;
        GtkTreeViewColumn *col;
    gint col_pos;
    GConfClient *client = gconf_client_get_default();
    ConfigData *cd = g_new0 (ConfigData, 1);

    GtkWidget *ech_configuration_box;
    GtkWidget *vbox2;
    GtkWidget *label1;
    GtkWidget *header_configuration_box;
    GtkWidget *header_container;
    GtkWidget *scrolledwindow1;
    GtkWidget *header_treeview;
    GtkWidget *vbuttonbox1;
    GtkWidget *header_add;
    GtkWidget *header_edit;
    GtkWidget *header_remove;

    ech_configuration_box = gtk_vbox_new (FALSE, 0);
    gtk_widget_show (ech_configuration_box);

    vbox2 = gtk_vbox_new (FALSE, 0);
    gtk_widget_show (vbox2);
    gtk_box_pack_start (GTK_BOX (ech_configuration_box), vbox2, FALSE, FALSE, 0);

    /* To translators: This string is used while adding a new message header to configuration, to specifying the format of the key values */
    label1 = gtk_label_new (_("The format for specifying a Custom Header key value is:\nName of the Custom Header key values separated by \";\"."));
    gtk_widget_show (label1);
    gtk_box_pack_start (GTK_BOX (vbox2), label1, FALSE, TRUE, 0);
    gtk_label_set_justify (GTK_LABEL (label1), GTK_JUSTIFY_CENTER);
    gtk_label_set_line_wrap (GTK_LABEL (label1), TRUE);

    header_configuration_box = gtk_vbox_new (FALSE, 5);
    gtk_widget_show (header_configuration_box);
    gtk_box_pack_start (GTK_BOX (ech_configuration_box), header_configuration_box, TRUE, TRUE, 0);

    header_container = gtk_hbox_new (FALSE, 6);
    gtk_widget_show (header_container);
    gtk_box_pack_start (GTK_BOX (header_configuration_box), header_container, TRUE, TRUE, 0);

    scrolledwindow1 = gtk_scrolled_window_new (NULL, NULL);
    gtk_widget_show (scrolledwindow1);
    gtk_box_pack_start (GTK_BOX (header_container), scrolledwindow1, TRUE, TRUE, 0);
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow1), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

    header_treeview = gtk_tree_view_new ();
    gtk_widget_show (header_treeview);
    gtk_container_add (GTK_CONTAINER (scrolledwindow1), header_treeview);
    gtk_container_set_border_width (GTK_CONTAINER (header_treeview), 1);

    vbuttonbox1 = gtk_vbutton_box_new ();
    gtk_widget_show (vbuttonbox1);
    gtk_box_pack_start (GTK_BOX (header_container), vbuttonbox1, FALSE, TRUE, 0);
    gtk_button_box_set_layout (GTK_BUTTON_BOX (vbuttonbox1), GTK_BUTTONBOX_START);
    gtk_box_set_spacing (GTK_BOX (vbuttonbox1), 6);

    header_add = gtk_button_new_from_stock ("gtk-add");
    gtk_widget_show (header_add);
    gtk_container_add (GTK_CONTAINER (vbuttonbox1), header_add);
    GTK_WIDGET_SET_FLAGS (header_add, GTK_CAN_DEFAULT);

    header_edit = gtk_button_new_from_stock ("gtk-edit");
    gtk_widget_show (header_edit);
    gtk_container_add (GTK_CONTAINER (vbuttonbox1), header_edit);
    GTK_WIDGET_SET_FLAGS (header_edit, GTK_CAN_DEFAULT);

    header_remove = gtk_button_new_from_stock ("gtk-remove");
    gtk_widget_show (header_remove);
    gtk_container_add (GTK_CONTAINER (vbuttonbox1), header_remove);
    GTK_WIDGET_SET_FLAGS (header_remove, GTK_CAN_DEFAULT);

    cd->gconf = gconf_client_get_default ();

    cd->treeview = header_treeview;

    cd->store = gtk_list_store_new (HEADER_N_COLUMNS, G_TYPE_STRING, G_TYPE_STRING);

    gtk_tree_view_set_model (GTK_TREE_VIEW (cd->treeview), GTK_TREE_MODEL (cd->store));

    renderer = gtk_cell_renderer_text_new ();
    col_pos = gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (cd->treeview), -1, _("Key"),
            renderer, "text", HEADER_KEY_COLUMN, NULL);
    col = gtk_tree_view_get_column (GTK_TREE_VIEW (cd->treeview), col_pos -1);
        gtk_tree_view_column_set_resizable (col, TRUE);
        gtk_tree_view_column_set_reorderable(col, TRUE);
        g_object_set (col, "min-width", 50, NULL);

    g_object_set (G_OBJECT (renderer), "editable", TRUE, NULL);
    g_signal_connect(renderer, "edited", (GCallback) cell_edited_callback, cd);

    renderer = gtk_cell_renderer_text_new ();
        col_pos = gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (cd->treeview), -1, _("Values"),
                        renderer, "text", HEADER_VALUE_COLUMN, NULL);
        col = gtk_tree_view_get_column (GTK_TREE_VIEW (cd->treeview), col_pos -1);
        gtk_tree_view_column_set_resizable (col, TRUE);
        gtk_tree_view_column_set_reorderable(col, TRUE);
        g_object_set (G_OBJECT (renderer), "editable", TRUE, NULL);

        g_signal_connect(renderer, "edited", (GCallback) cell_value_edited_callback, cd);

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (cd->treeview));
    gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
    g_signal_connect (G_OBJECT (selection), "changed", G_CALLBACK (selection_changed), cd);
    gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (cd->treeview), TRUE);

    cd->header_add = header_add;
    g_signal_connect (G_OBJECT (cd->header_add), "clicked", G_CALLBACK (header_add_clicked), cd);

    cd->header_remove = header_remove;
    g_signal_connect (G_OBJECT (cd->header_remove), "clicked", G_CALLBACK (header_remove_clicked), cd);
    gtk_widget_set_sensitive (cd->header_remove, FALSE);

    cd->header_edit = header_edit;
    g_signal_connect (G_OBJECT (cd->header_edit), "clicked", G_CALLBACK (header_edit_clicked), cd);
    gtk_widget_set_sensitive (cd->header_edit, FALSE);

    model = gtk_tree_view_get_model (GTK_TREE_VIEW (cd->treeview));
    g_signal_connect(G_OBJECT(model), "row-changed", G_CALLBACK(header_isempty), cd);

    /* Populate tree view with values from gconf */
    header_list = gconf_client_get_list (client,GCONF_KEY_CUSTOM_HEADER,GCONF_VALUE_STRING, NULL);

    for (list = header_list; list; list = g_slist_next (list)) {
        gchar **parse_header_list;

                buffer = list->data;
        gtk_list_store_append (cd->store, &iter);

                parse_header_list = g_strsplit_set (buffer, "=,", -1);

                gtk_list_store_set (cd->store, &iter, HEADER_KEY_COLUMN, parse_header_list[0], -1);

        for (index = 0; parse_header_list[index+1] ; ++index) {
                        gtk_list_store_set (cd->store, &iter, HEADER_VALUE_COLUMN, parse_header_list[index+1], -1);
                }
    }

    if (header_list) {
        g_slist_foreach (header_list, (GFunc) g_free, NULL);
        g_slist_free (header_list);
    }

    /* Add the list here */

    hbox = gtk_vbox_new (FALSE, 0);

    gtk_box_pack_start (GTK_BOX (hbox), ech_configuration_box, TRUE, TRUE, 0);

    /* to let free data properly on destroy of configuration widget */
    g_object_set_data_full (G_OBJECT (hbox), "mycd-data", cd, destroy_cd_data);

    return hbox;
}

/* Configuration in Mail Prefs Page goes here */

GtkWidget *
org_gnome_email_custom_header_config_option (struct _EPlugin *epl, struct _EConfigHookItemFactoryData *data)
{
    /* This function and the hook needs to be removed,
    once the configure code is thoroughly tested */

    return NULL;

}