path: root/filter/rule-editor.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Copyright (C) 2000-2002 Ximian Inc.
 *
 *  Authors: Not Zed <notzed@lostzed.mmc.com.au>
 *           Jeffrey Stedfast <fejj@ximian.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU 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 General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */


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

/* for getenv only, remove when getenv need removed */
#include <stdlib.h>
#include <string.h>

#include <glib/gi18n.h>

#include "e-util/e-error.h"
#include "e-util/e-util-private.h"
#include "rule-editor.h"

static int enable_undo = 0;

#define d(x)

static void set_source (RuleEditor *re, const char *source);
static void set_sensitive (RuleEditor *re);
static FilterRule *create_rule (RuleEditor *re);

static void cursor_changed (GtkTreeView *treeview, RuleEditor *re);

static void rule_editor_class_init (RuleEditorClass *klass);
static void rule_editor_init (RuleEditor *re);
static void rule_editor_finalise (GObject *obj);
static void rule_editor_destroy (GtkObject *obj);

static void dialog_rule_changed (FilterRule *fr, GtkWidget *dialog);

#define _PRIVATE(x)(((RuleEditor *)(x))->priv)

enum {
    BUTTON_ADD,
    BUTTON_EDIT,
    BUTTON_DELETE,
    BUTTON_TOP,
    BUTTON_UP,
    BUTTON_DOWN,
    BUTTON_BOTTOM,
    BUTTON_LAST
};

struct _RuleEditorPrivate {
    GtkButton *buttons[BUTTON_LAST];
};

static GtkDialogClass *parent_class = NULL;


GtkType
rule_editor_get_type (void)
{
    static GtkType type = 0;

    if (!type) {
        static const GTypeInfo info = {
            sizeof (RuleEditorClass),
            NULL, /* base_class_init */
            NULL, /* base_class_finalize */
            (GClassInitFunc) rule_editor_class_init,
            NULL, /* class_finalize */
            NULL, /* class_data */
            sizeof (RuleEditor),
            0,    /* n_preallocs */
            (GInstanceInitFunc) rule_editor_init,
        };

        /* TODO: Remove when it works (or never will) */
        enable_undo = getenv ("EVOLUTION_RULE_UNDO") != NULL;

        type = g_type_register_static (gtk_dialog_get_type (), "RuleEditor", &info, 0);
    }

    return type;
}

static void
rule_editor_class_init (RuleEditorClass *klass)
{
    GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
    GtkObjectClass *object_class = (GtkObjectClass *) klass;

    parent_class = g_type_class_ref(gtk_dialog_get_type ());

    gobject_class->finalize = rule_editor_finalise;
    object_class->destroy = rule_editor_destroy;

    /* override methods */
    klass->set_source = set_source;
    klass->set_sensitive = set_sensitive;
    klass->create_rule = create_rule;
}

static void
rule_editor_init (RuleEditor *re)
{
    re->priv = g_malloc0 (sizeof (*re->priv));
}

static void
rule_editor_finalise (GObject *obj)
{
    RuleEditor *re = (RuleEditor *)obj;
    RuleEditorUndo *undo, *next;

    g_object_unref (re->context);
    g_free (re->priv);

    undo = re->undo_log;
    while (undo) {
        next = undo->next;
        g_object_unref (undo->rule);
        g_free (undo);
        undo = next;
    }

    G_OBJECT_CLASS (parent_class)->finalize (obj);
}

static void
rule_editor_destroy (GtkObject *obj)
{
    RuleEditor *re = (RuleEditor *) obj;

    if (re->dialog) {
        gtk_widget_destroy (GTK_WIDGET (re->dialog));
        re->dialog = NULL;
    }

    ((GtkObjectClass *)(parent_class))->destroy (obj);
}

/**
 * rule_editor_new:
 *
 * Create a new RuleEditor object.
 *
 * Return value: A new #RuleEditor object.
 **/
RuleEditor *
rule_editor_new (RuleContext *rc, const char *source, const char *label)
{
    RuleEditor *re = (RuleEditor *) g_object_new (RULE_TYPE_EDITOR, NULL);
    GladeXML *gui;
    char *filter_glade = g_build_filename (EVOLUTION_GLADEDIR,
                           "filter.glade",
                           NULL);

    gui = glade_xml_new (filter_glade, "rule_editor", NULL);
    g_free (filter_glade);
    rule_editor_construct (re, rc, gui, source, label);
        gtk_widget_hide(glade_xml_get_widget (gui, "filter_source"));
    g_object_unref (gui);

    return re;
}

/* used internally by implementations if required */
void
rule_editor_set_sensitive (RuleEditor *re)
{
    RULE_EDITOR_GET_CLASS (re)->set_sensitive (re);
}

/* used internally by implementations */
void
rule_editor_set_source (RuleEditor *re, const char *source)
{
    RULE_EDITOR_GET_CLASS (re)->set_source (re, source);
}

/* factory method for "add" button */
FilterRule *
rule_editor_create_rule (RuleEditor *re)
{
    return RULE_EDITOR_GET_CLASS (re)->create_rule (re);
}

static FilterRule *
create_rule (RuleEditor *re)
{
    FilterRule *rule = filter_rule_new ();
    FilterPart *part;

    /* create a rule with 1 part in it */
    part = rule_context_next_part (re->context, NULL);
    filter_rule_add_part (rule, filter_part_clone (part));

    return rule;
}

static void
editor_destroy (RuleEditor *re, GObject *deadbeef)
{
    if (re->edit) {
        g_object_unref (re->edit);
        re->edit = NULL;
    }

    re->dialog = NULL;

    gtk_widget_set_sensitive (GTK_WIDGET (re), TRUE);
    rule_editor_set_sensitive (re);
}

static void
rule_editor_add_undo (RuleEditor *re, int type, FilterRule *rule, int rank, int newrank)
{
        RuleEditorUndo *undo;

        if (!re->undo_active && enable_undo) {
                undo = g_malloc0 (sizeof (*undo));
                undo->rule = rule;
                undo->type = type;
                undo->rank = rank;
                undo->newrank = newrank;

                undo->next = re->undo_log;
                re->undo_log = undo;
        } else {
                g_object_unref (rule);
        }
}

static void
rule_editor_play_undo (RuleEditor *re)
{
    RuleEditorUndo *undo, *next;
    FilterRule *rule;

    re->undo_active = TRUE;
    undo = re->undo_log;
    re->undo_log = NULL;
    while (undo) {
        next = undo->next;
        switch (undo->type) {
        case RULE_EDITOR_LOG_EDIT:
            d(printf ("Undoing edit on rule '%s'\n", undo->rule->name));
            rule = rule_context_find_rank_rule (re->context, undo->rank, undo->rule->source);
            if (rule) {
                d(printf (" name was '%s'\n", rule->name));
                filter_rule_copy (rule, undo->rule);
                d(printf (" name is '%s'\n", rule->name));
            } else {
                g_warning ("Could not find the right rule to undo against?");
            }
            break;
        case RULE_EDITOR_LOG_ADD:
            d(printf ("Undoing add on rule '%s'\n", undo->rule->name));
            rule = rule_context_find_rank_rule (re->context, undo->rank, undo->rule->source);
            if (rule)
                rule_context_remove_rule (re->context, rule);
            break;
        case RULE_EDITOR_LOG_REMOVE:
            d(printf ("Undoing remove on rule '%s'\n", undo->rule->name));
            g_object_ref (undo->rule);
            rule_context_add_rule (re->context, undo->rule);
            rule_context_rank_rule (re->context, undo->rule, re->source, undo->rank);
            break;
        case RULE_EDITOR_LOG_RANK:
            rule = rule_context_find_rank_rule (re->context, undo->newrank, undo->rule->source);
            if (rule)
                rule_context_rank_rule (re->context, rule, re->source, undo->rank);
            break;
        }

        g_object_unref (undo->rule);
        g_free (undo);
        undo = next;
    }
    re->undo_active = FALSE;
}

static void
editor_response (GtkWidget *dialog, int button, RuleEditor *re)
{
    if (button == GTK_RESPONSE_CANCEL) {
        if (enable_undo)
            rule_editor_play_undo (re);
        else {
            RuleEditorUndo *undo, *next;

            undo = re->undo_log;
            re->undo_log = NULL;
            while (undo) {
                next = undo->next;
                g_object_unref (undo->rule);
                g_free (undo);
                undo = next;
            }
        }
    }
}

static void
add_editor_response (GtkWidget *dialog, int button, RuleEditor *re)
{
    GtkTreeSelection *selection;
    GtkTreePath *path;
    GtkTreeIter iter;

    if (button == GTK_RESPONSE_OK) {
        if (!filter_rule_validate (re->edit)) {
            /* no need to popup a dialog because the validate code does that. */
            return;
        }

        if (rule_context_find_rule (re->context, re->edit->name, re->edit->source)) {
            e_error_run((GtkWindow *)dialog, "filter:bad-name-notunique", re->edit->name, NULL);
            return;
        }

        g_object_ref (re->edit);

        gtk_list_store_append (re->model, &iter);
        gtk_list_store_set (re->model, &iter, 0, re->edit->name, 1, re->edit, -1);
        selection = gtk_tree_view_get_selection (re->list);
        gtk_tree_selection_select_iter (selection, &iter);

        /* scroll to the newly added row */
        path = gtk_tree_model_get_path ((GtkTreeModel *) re->model, &iter);
        gtk_tree_view_scroll_to_cell (re->list, path, NULL, TRUE, 1.0, 0.0);
        gtk_tree_path_free (path);

        re->current = re->edit;
        rule_context_add_rule (re->context, re->current);

        g_object_ref (re->current);
        rule_editor_add_undo (re, RULE_EDITOR_LOG_ADD, re->current,
                      rule_context_get_rank_rule (re->context, re->current, re->current->source), 0);
    }

    gtk_widget_destroy (dialog);
}

static void
rule_add (GtkWidget *widget, RuleEditor *re)
{
    GtkWidget *rules;

    if (re->edit != NULL)
        return;

    re->edit = rule_editor_create_rule (re);
    filter_rule_set_source (re->edit, re->source);
    rules = filter_rule_get_widget (re->edit, re->context);

    re->dialog = gtk_dialog_new ();
    gtk_dialog_add_buttons ((GtkDialog *) re->dialog,
                GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                GTK_STOCK_OK, GTK_RESPONSE_OK,
                NULL);
    gtk_dialog_set_has_separator ((GtkDialog *) re->dialog, FALSE);

    gtk_window_set_title ((GtkWindow *) re->dialog, _("Add Rule"));
    gtk_window_set_default_size (GTK_WINDOW (re->dialog), 650, 400);
    gtk_window_set_resizable (GTK_WINDOW (re->dialog), TRUE);
    gtk_window_set_transient_for ((GtkWindow *) re->dialog, (GtkWindow *) re);
    gtk_container_set_border_width ((GtkContainer *) re->dialog, 6);

    gtk_box_pack_start (GTK_BOX (GTK_DIALOG (re->dialog)->vbox), rules, TRUE, TRUE, 3);

    g_signal_connect (re->dialog, "response", G_CALLBACK (add_editor_response), re);
    g_object_weak_ref ((GObject *) re->dialog, (GWeakNotify) editor_destroy, re);

    g_signal_connect (re->edit, "changed", G_CALLBACK (dialog_rule_changed), re->dialog);
    dialog_rule_changed (re->edit, re->dialog);

    gtk_widget_set_sensitive (GTK_WIDGET (re), FALSE);

    gtk_widget_show (re->dialog);
}

static void
edit_editor_response (GtkWidget *dialog, int button, RuleEditor *re)
{
    FilterRule *rule;
    GtkTreePath *path;
    GtkTreeIter iter;
    int pos;

    if (button == GTK_RESPONSE_OK) {
        if (!filter_rule_validate (re->edit)) {
            /* no need to popup a dialog because the validate code does that. */
            return;
        }

        rule = rule_context_find_rule (re->context, re->edit->name, re->edit->source);
        if (rule != NULL && rule != re->current) {
            e_error_run((GtkWindow *)dialog, "filter:bad-name-notunique", rule->name, NULL);

            return;
        }

        pos = rule_context_get_rank_rule (re->context, re->current, re->source);
        if (pos != -1) {
            path = gtk_tree_path_new ();
            gtk_tree_path_append_index (path, pos);
            gtk_tree_model_get_iter (GTK_TREE_MODEL (re->model), &iter, path);
            gtk_tree_path_free (path);

            gtk_list_store_set (re->model, &iter, 0, re->edit->name, -1);

            rule_editor_add_undo (re, RULE_EDITOR_LOG_EDIT, filter_rule_clone (re->current),
                          pos, 0);

            /* replace the old rule with the new rule */
            filter_rule_copy (re->current, re->edit);
        }
    }

    gtk_widget_destroy (dialog);
}

static void
rule_edit (GtkWidget *widget, RuleEditor *re)
{
    GtkWidget *rules;

    if (re->current == NULL || re->edit != NULL)
        return;

    re->edit = filter_rule_clone (re->current);

    rules = filter_rule_get_widget (re->edit, re->context);

    re->dialog = gtk_dialog_new ();
    gtk_dialog_add_buttons ((GtkDialog *) re->dialog,
                GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                GTK_STOCK_OK, GTK_RESPONSE_OK,
                NULL);
    gtk_dialog_set_has_separator ((GtkDialog *) re->dialog, FALSE);

    gtk_window_set_title ((GtkWindow *) re->dialog, _("Edit Rule"));
    gtk_window_set_default_size (GTK_WINDOW (re->dialog), 650, 400);
    gtk_window_set_resizable (GTK_WINDOW (re->dialog), TRUE);
    gtk_widget_set_parent_window (GTK_WIDGET (re->dialog), GTK_WIDGET (re)->window);
    gtk_container_set_border_width ((GtkContainer *) re->dialog, 6);

    gtk_box_pack_start (GTK_BOX (GTK_DIALOG (re->dialog)->vbox), rules, TRUE, TRUE, 3);

    g_signal_connect (re->dialog, "response", G_CALLBACK (edit_editor_response), re);
    g_object_weak_ref ((GObject *) re->dialog, (GWeakNotify) editor_destroy, re);

    g_signal_connect (re->edit, "changed", G_CALLBACK (dialog_rule_changed), re->dialog);
    dialog_rule_changed (re->edit, re->dialog);

    gtk_widget_set_sensitive (GTK_WIDGET (re), FALSE);

    gtk_widget_show (re->dialog);
}

static void
rule_delete (GtkWidget *widget, RuleEditor *re)
{
    GtkTreeSelection *selection;
    GtkTreePath *path;
    GtkTreeIter iter;
    int pos, len;

    d(printf ("delete rule\n"));
    pos = rule_context_get_rank_rule (re->context, re->current, re->source);
    if (pos != -1) {
        rule_context_remove_rule (re->context, re->current);

        path = gtk_tree_path_new ();
        gtk_tree_path_append_index (path, pos);
        gtk_tree_model_get_iter (GTK_TREE_MODEL (re->model), &iter, path);
        gtk_list_store_remove (re->model, &iter);
        gtk_tree_path_free (path);

        rule_editor_add_undo (re, RULE_EDITOR_LOG_REMOVE, re->current,
                      rule_context_get_rank_rule (re->context, re->current, re->current->source), 0);
#if 0
        g_object_unref (re->current);
#endif
        re->current = NULL;

        /* now select the next rule */
        len = gtk_tree_model_iter_n_children (GTK_TREE_MODEL (re->model), NULL);
        pos = pos >= len ? len - 1 : pos;

        if (pos >= 0) {
            path = gtk_tree_path_new ();
            gtk_tree_path_append_index (path, pos);
            gtk_tree_model_get_iter (GTK_TREE_MODEL (re->model), &iter, path);
            gtk_tree_path_free (path);

            /* select the new row */
            selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (re->list));
            gtk_tree_selection_select_iter (selection, &iter);

            /* scroll to the selected row */
            path = gtk_tree_model_get_path ((GtkTreeModel *) re->model, &iter);
            gtk_tree_view_scroll_to_cell (re->list, path, NULL, FALSE, 0.0, 0.0);
            gtk_tree_path_free (path);

            /* update our selection state */
            cursor_changed (re->list, re);
            return;
        }
    }

    rule_editor_set_sensitive (re);
}

static void
rule_move (RuleEditor *re, int from, int to)
{
    GtkTreeSelection *selection;
    GtkTreePath *path;
    GtkTreeIter iter;
    FilterRule *rule;

    g_object_ref (re->current);
    rule_editor_add_undo (re, RULE_EDITOR_LOG_RANK, re->current,
                  rule_context_get_rank_rule (re->context, re->current, re->source), to);

    d(printf ("moving %d to %d\n", from, to));
    rule_context_rank_rule (re->context, re->current, re->source, to);

    path = gtk_tree_path_new ();
    gtk_tree_path_append_index (path, from);
    gtk_tree_model_get_iter (GTK_TREE_MODEL (re->model), &iter, path);
    gtk_tree_path_free (path);

    gtk_tree_model_get (GTK_TREE_MODEL (re->model), &iter, 1, &rule, -1);
    g_return_if_fail (rule != NULL);

    /* remove and then re-insert the row at the new location */
    gtk_list_store_remove (re->model, &iter);
    gtk_list_store_insert (re->model, &iter, to);

    /* set the data on the row */
    gtk_list_store_set (re->model, &iter, 0, rule->name, 1, rule, -1);

    /* select the row */
    selection = gtk_tree_view_get_selection (re->list);
    gtk_tree_selection_select_iter (selection, &iter);

    /* scroll to the selected row */
    path = gtk_tree_model_get_path ((GtkTreeModel *) re->model, &iter);
    gtk_tree_view_scroll_to_cell (re->list, path, NULL, FALSE, 0.0, 0.0);
    gtk_tree_path_free (path);

    rule_editor_set_sensitive (re);
}

static void
rule_top (GtkWidget *widget, RuleEditor *re)
{
    int pos;

    d(printf ("top rule\n"));
    pos = rule_context_get_rank_rule (re->context, re->current, re->source);
    if (pos > 0)
        rule_move (re, pos, 0);
}

static void
rule_up (GtkWidget *widget, RuleEditor *re)
{
    int pos;

    d(printf ("up rule\n"));
    pos = rule_context_get_rank_rule (re->context, re->current, re->source);
    if (pos > 0)
        rule_move (re, pos, pos - 1);
}

static void
rule_down (GtkWidget *widget, RuleEditor *re)
{
    int pos;

    d(printf ("down rule\n"));
    pos = rule_context_get_rank_rule (re->context, re->current, re->source);
    if (pos >= 0)
        rule_move (re, pos, pos + 1);
}

static void
rule_bottom (GtkWidget *widget, RuleEditor *re)
{
    int pos;
    int index = -1, count = 0;
    FilterRule *rule = NULL;

    d(printf ("bottom rule\n"));
    pos = rule_context_get_rank_rule (re->context, re->current, re->source);
    /* There's probably a better/faster way to get the count of the list here */
    while ((rule = rule_context_next_rule (re->context, rule, re->source))) {
        if (rule == re->current)
            index = count;
        count++;
    }
    count--;
    if (pos >= 0)
        rule_move (re, pos, count);
}

static struct {
    char *name;
    GtkSignalFunc func;
} edit_buttons[] = {
    { "rule_add",    G_CALLBACK (rule_add)    },
    { "rule_edit",   G_CALLBACK (rule_edit)   },
    { "rule_delete", G_CALLBACK (rule_delete) },
    { "rule_top",    G_CALLBACK (rule_top)    },
    { "rule_up",     G_CALLBACK (rule_up)     },
    { "rule_down",   G_CALLBACK (rule_down)   },
    { "rule_bottom", G_CALLBACK (rule_bottom) },
};

static void
set_sensitive (RuleEditor *re)
{
    FilterRule *rule = NULL;
    int index = -1, count = 0;

    while ((rule = rule_context_next_rule (re->context, rule, re->source))) {
        if (rule == re->current)
            index = count;
        count++;
    }

    d(printf("index = %d count=%d\n", index, count));

    count--;

    gtk_widget_set_sensitive (GTK_WIDGET (re->priv->buttons[BUTTON_EDIT]), index != -1);
    gtk_widget_set_sensitive (GTK_WIDGET (re->priv->buttons[BUTTON_DELETE]), index != -1);
    gtk_widget_set_sensitive (GTK_WIDGET (re->priv->buttons[BUTTON_TOP]), index > 0);
    gtk_widget_set_sensitive (GTK_WIDGET (re->priv->buttons[BUTTON_UP]), index > 0);
    gtk_widget_set_sensitive (GTK_WIDGET (re->priv->buttons[BUTTON_DOWN]), index >= 0 && index < count);
    gtk_widget_set_sensitive (GTK_WIDGET (re->priv->buttons[BUTTON_BOTTOM]), index >= 0 && index < count);
}

static void
dialog_rule_changed (FilterRule *fr, GtkWidget *dialog)
{
    g_return_if_fail (dialog != NULL);

    gtk_dialog_set_response_sensitive (GTK_DIALOG (dialog), GTK_RESPONSE_OK, fr && fr->parts);
}

static void
cursor_changed (GtkTreeView *treeview, RuleEditor *re)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter;

    selection = gtk_tree_view_get_selection (re->list);
    if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
        gtk_tree_model_get (GTK_TREE_MODEL (re->model), &iter, 1, &re->current, -1);

        g_return_if_fail (re->current);

        rule_editor_set_sensitive (re);
    }
}

static void
double_click (GtkTreeView *treeview, GtkTreePath *path, GtkTreeViewColumn *column, RuleEditor *re)
{
    GtkTreeSelection *selection;
    GtkTreeModel *model;
    GtkTreeIter iter;

    selection = gtk_tree_view_get_selection (re->list);
    if (gtk_tree_selection_get_selected (selection, &model, &iter))
        gtk_tree_model_get (GTK_TREE_MODEL (re->model), &iter, 1, &re->current, -1);

    if (re->current)
        rule_edit ((GtkWidget *) treeview, re);
}

static void
set_source (RuleEditor *re, const char *source)
{
    FilterRule *rule = NULL;
    GtkTreeIter iter;

    gtk_list_store_clear (re->model);

    d(printf("Checking for rules that are of type %s\n", source ? source : "<nil>"));
    while ((rule = rule_context_next_rule (re->context, rule, source)) != NULL) {
        d(printf("Adding row '%s'\n", rule->name));
        gtk_list_store_append (re->model, &iter);
        gtk_list_store_set (re->model, &iter, 0, rule->name, 1, rule, -1);
    }

    g_free (re->source);
    re->source = g_strdup (source);
    re->current = NULL;
    rule_editor_set_sensitive (re);
}

GtkWidget *rule_editor_treeview_new (char *widget_name, char *string1, char *string2,
                     int int1, int int2);

GtkWidget *
rule_editor_treeview_new (char *widget_name, char *string1, char *string2, int int1, int int2)
{
    GtkWidget *table, *scrolled;
    GtkTreeSelection *selection;
    GtkCellRenderer *renderer;
    GtkListStore *model;

    scrolled = gtk_scrolled_window_new (NULL, NULL);
    gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled), GTK_SHADOW_IN);
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled),
                    GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

    model = gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_POINTER);
    table = gtk_tree_view_new_with_model ((GtkTreeModel *) model);
    gtk_tree_view_set_headers_visible ((GtkTreeView *) table, FALSE);

    renderer = gtk_cell_renderer_text_new ();
    gtk_tree_view_insert_column_with_attributes ((GtkTreeView *) table, -1,
                             _("Rule name"), renderer,
                             "text", 0, NULL);

    selection = gtk_tree_view_get_selection ((GtkTreeView *) table);
    gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);

    gtk_container_add (GTK_CONTAINER (scrolled), table);

    g_object_set_data ((GObject *) scrolled, "table", table);
    g_object_set_data ((GObject *) scrolled, "model", model);

    gtk_widget_show (scrolled);
    gtk_widget_show (table);

    g_object_unref (model);

    return scrolled;
}

void
rule_editor_construct (RuleEditor *re, RuleContext *context, GladeXML *gui, const char *source, const char *label)
{
    GtkWidget *w;
    int i;
    char *tmp;

    re->context = context;
    g_object_ref (context);

    gtk_window_set_resizable ((GtkWindow *) re, TRUE);
    gtk_window_set_default_size ((GtkWindow *) re, 350, 400);
    gtk_widget_realize ((GtkWidget *) re);
    gtk_container_set_border_width ((GtkContainer *) ((GtkDialog *) re)->action_area, 12);

    w = glade_xml_get_widget(gui, "rule_editor");
    gtk_box_pack_start((GtkBox *)((GtkDialog *)re)->vbox, w, TRUE, TRUE, 3);

    for (i = 0; i < BUTTON_LAST; i++) {
        re->priv->buttons[i] = (GtkButton *) (w = glade_xml_get_widget (gui, edit_buttons[i].name));
        g_signal_connect (w, "clicked", edit_buttons[i].func, re);
    }

    w = glade_xml_get_widget (gui, "rule_list");
    re->list = (GtkTreeView *) g_object_get_data ((GObject *) w, "table");
    re->model = (GtkListStore *) g_object_get_data ((GObject *) w, "model");

    g_signal_connect (re->list, "cursor-changed", G_CALLBACK (cursor_changed), re);
    g_signal_connect (re->list, "row-activated", G_CALLBACK (double_click), re);

    w = glade_xml_get_widget (gui, "rule_label");
    tmp = alloca(strlen(label)+8);
    sprintf(tmp, "<b>%s</b>", label);
    gtk_label_set_label((GtkLabel *)w, tmp);
    gtk_label_set_mnemonic_widget ((GtkLabel *) w, (GtkWidget *) re->list);

    g_signal_connect (re, "response", G_CALLBACK (editor_response), re);
    rule_editor_set_source (re, source);

    gtk_dialog_set_has_separator ((GtkDialog *) re, FALSE);
    gtk_dialog_add_buttons ((GtkDialog *) re,
                GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                GTK_STOCK_OK, GTK_RESPONSE_OK,
                NULL);
}