/*
 * 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:
 *		Not Zed <notzed@lostzed.mmc.com.au>
 *		Jeffrey Stedfast <fejj@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include <string.h>

#include <gtk/gtk.h>
#include <glib/gi18n.h>

#include "e-util/e-error.h"
#include "filter-rule.h"
#include "rule-context.h"

#define d(x)

static gint validate(FilterRule *);
static gint rule_eq(FilterRule *fr, FilterRule *cm);
static xmlNodePtr xml_encode (FilterRule *);
static gint xml_decode (FilterRule *, xmlNodePtr, RuleContext *);
static void build_code (FilterRule *, GString * out);
static void rule_copy  (FilterRule *dest, FilterRule *src);
static GtkWidget *get_widget (FilterRule * fr, struct _RuleContext *f);

static void filter_rule_class_init (FilterRuleClass *klass);
static void filter_rule_init (FilterRule *fr);
static void filter_rule_finalise (GObject *obj);

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

struct _FilterRulePrivate {
	gint frozen;
};

static GObjectClass *parent_class = NULL;

enum {
	CHANGED,
	LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };

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

	if (!type) {
		static const GTypeInfo info = {
			sizeof (FilterRuleClass),
			NULL, /* base_class_init */
			NULL, /* base_class_finalize */
			(GClassInitFunc) filter_rule_class_init,
			NULL, /* class_finalize */
			NULL, /* class_data */
			sizeof (FilterRule),
			0,    /* n_preallocs */
			(GInstanceInitFunc) filter_rule_init,
		};

		type = g_type_register_static (G_TYPE_OBJECT, "FilterRule", &info, 0);
	}

	return type;
}

static void
filter_rule_class_init (FilterRuleClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);

	parent_class = g_type_class_ref (G_TYPE_OBJECT);

	object_class->finalize = filter_rule_finalise;

	/* override methods */
	klass->validate = validate;
	klass->eq = rule_eq;
	klass->xml_encode = xml_encode;
	klass->xml_decode = xml_decode;
	klass->build_code = build_code;
	klass->copy = rule_copy;
	klass->get_widget = get_widget;

	/* signals */
	signals[CHANGED] =
		g_signal_new ("changed",
			      FILTER_TYPE_RULE,
			      G_SIGNAL_RUN_LAST,
			      G_STRUCT_OFFSET (FilterRuleClass, changed),
			      NULL,
			      NULL,
			      g_cclosure_marshal_VOID__VOID,
			      G_TYPE_NONE, 0);
}

static void
filter_rule_init (FilterRule *fr)
{
	fr->priv = g_malloc0 (sizeof (*fr->priv));
	fr->enabled = TRUE;
}

static void
filter_rule_finalise (GObject *obj)
{
	FilterRule *fr = (FilterRule *) obj;

	g_free (fr->name);
	g_free (fr->source);
	g_list_foreach (fr->parts, (GFunc)g_object_unref, NULL);
	g_list_free (fr->parts);

	g_free (fr->priv);

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

/**
 * filter_rule_new:
 *
 * Create a new FilterRule object.
 *
 * Return value: A new #FilterRule object.
 **/
FilterRule *
filter_rule_new (void)
{
	return (FilterRule *) g_object_new (FILTER_TYPE_RULE, NULL, NULL);
}

FilterRule *
filter_rule_clone (FilterRule *base)
{
	FilterRule *rule;

	g_return_val_if_fail (IS_FILTER_RULE (base), NULL);

	rule = g_object_new (G_OBJECT_TYPE (base), NULL, NULL);
	filter_rule_copy (rule, base);

	return rule;
}

void
filter_rule_set_name (FilterRule *fr, const gchar *name)
{
	g_return_if_fail (IS_FILTER_RULE (fr));

	if ((fr->name && name && strcmp (fr->name, name) == 0)
	    || (fr->name == NULL && name == NULL))
		return;

	g_free (fr->name);
	fr->name = g_strdup (name);

	filter_rule_emit_changed (fr);
}

void
filter_rule_set_source (FilterRule *fr, const gchar *source)
{
	g_return_if_fail (IS_FILTER_RULE (fr));

	if ((fr->source && source && strcmp (fr->source, source) == 0)
	    || (fr->source == NULL && source == NULL))
		return;

	g_free (fr->source);
	fr->source = g_strdup (source);

	filter_rule_emit_changed (fr);
}

gint
filter_rule_validate (FilterRule *fr)
{
	g_return_val_if_fail (IS_FILTER_RULE (fr), 0);

	return FILTER_RULE_GET_CLASS (fr)->validate (fr);
}

static gint
validate (FilterRule *fr)
{
	gint valid = TRUE;
	GList *parts;

	if (!fr->name || !*fr->name) {
		/* FIXME: FilterElement should probably have a
                   GtkWidget member pointing to the value gotten with
                   ::get_widget() so that we can get the parent window
                   here. */
		e_error_run(NULL, "filter:no-name", NULL);

		return FALSE;
	}

	/* validate rule parts */
	parts = fr->parts;
	valid = parts != NULL;
	while (parts && valid) {
		valid = filter_part_validate ((FilterPart *) parts->data);
		parts = parts->next;
	}

	return valid;
}

gint
filter_rule_eq (FilterRule *fr, FilterRule *cm)
{
	g_return_val_if_fail (IS_FILTER_RULE (fr), 0);
	g_return_val_if_fail (IS_FILTER_RULE (cm), 0);

	return (FILTER_RULE_GET_CLASS (fr) == FILTER_RULE_GET_CLASS (cm))
		&& FILTER_RULE_GET_CLASS (fr)->eq (fr, cm);
}

static gint
list_eq(GList *al, GList *bl)
{
	gint truth = TRUE;

	while (truth && al && bl) {
		FilterPart *a = al->data, *b = bl->data;

		truth = filter_part_eq (a, b);
		al = al->next;
		bl = bl->next;
	}

	return truth && al == NULL && bl == NULL;
}

static gint
rule_eq (FilterRule *fr, FilterRule *cm)
{
	return fr->enabled == cm->enabled
		&& fr->grouping == cm->grouping
		&& fr->threading == fr->threading
		&& ((fr->name && cm->name && strcmp (fr->name, cm->name) == 0)
		     || (fr->name == NULL && cm->name == NULL))
		&& ((fr->source && cm->source && strcmp (fr->source, cm->source) == 0)
		     || (fr->source == NULL && cm->source == NULL) )
		&& list_eq (fr->parts, cm->parts);
}

xmlNodePtr
filter_rule_xml_encode (FilterRule *fr)
{
	g_return_val_if_fail (IS_FILTER_RULE (fr), NULL);

	return FILTER_RULE_GET_CLASS (fr)->xml_encode (fr);
}

static xmlNodePtr
xml_encode (FilterRule *fr)
{
	xmlNodePtr node, set, work;
	GList *l;

	node = xmlNewNode (NULL, (const guchar *)"rule");

	xmlSetProp (node, (const guchar *)"enabled", (const guchar *)(fr->enabled ? "true" : "false"));

	switch (fr->grouping) {
	case FILTER_GROUP_ALL:
		xmlSetProp (node, (const guchar *)"grouping", (const guchar *)"all");
		break;
	case FILTER_GROUP_ANY:
		xmlSetProp (node, (const guchar *)"grouping", (const guchar *)"any");
		break;
	}

	switch (fr->threading) {
	case FILTER_THREAD_NONE:
		break;
	case FILTER_THREAD_ALL:
		xmlSetProp(node, (const guchar *)"threading", (const guchar *)"all");
		break;
	case FILTER_THREAD_REPLIES:
		xmlSetProp(node, (const guchar *)"threading", (const guchar *)"replies");
		break;
	case FILTER_THREAD_REPLIES_PARENTS:
		xmlSetProp(node, (const guchar *)"threading", (const guchar *)"replies_parents");
		break;
	case FILTER_THREAD_SINGLE:
		xmlSetProp(node, (const guchar *)"threading", (const guchar *)"single");
		break;
	}

	if (fr->source) {
		xmlSetProp (node, (const guchar *)"source", (guchar *)fr->source);
	} else {
		/* set to the default filter type */
		xmlSetProp (node, (const guchar *)"source", (const guchar *)"incoming");
	}

	if (fr->name) {
		gchar *escaped = g_markup_escape_text (fr->name, -1);

		work = xmlNewNode (NULL, (const guchar *)"title");
		xmlNodeSetContent (work, (guchar *)escaped);
		xmlAddChild (node, work);

		g_free (escaped);
	}

	set = xmlNewNode (NULL, (const guchar *)"partset");
	xmlAddChild (node, set);
	l = fr->parts;
	while (l) {
		work = filter_part_xml_encode ((FilterPart *) l->data);
		xmlAddChild (set, work);
		l = l->next;
	}

	return node;
}

static void
load_set (xmlNodePtr node, FilterRule *fr, RuleContext *f)
{
	xmlNodePtr work;
	gchar *rulename;
	FilterPart *part;

	work = node->children;
	while (work) {
		if (!strcmp ((gchar *)work->name, "part")) {
			rulename = (gchar *)xmlGetProp (work, (const guchar *)"name");
			part = rule_context_find_part (f, rulename);
			if (part) {
				part = filter_part_clone (part);
				filter_part_xml_decode (part, work);
				filter_rule_add_part (fr, part);
			} else {
				g_warning ("cannot find rule part '%s'\n", rulename);
			}
			xmlFree (rulename);
		} else if (work->type == XML_ELEMENT_NODE) {
			g_warning ("Unknown xml node in part: %s", work->name);
		}
		work = work->next;
	}
}

gint
filter_rule_xml_decode (FilterRule *fr, xmlNodePtr node, RuleContext *f)
{
	gint res;

	g_return_val_if_fail (IS_FILTER_RULE (fr), 0);
	g_return_val_if_fail (IS_RULE_CONTEXT (f), 0);
	g_return_val_if_fail (node != NULL, 0);

	fr->priv->frozen++;
	res = FILTER_RULE_GET_CLASS (fr)->xml_decode (fr, node, f);
	fr->priv->frozen--;

	filter_rule_emit_changed (fr);

	return res;
}

static gint
xml_decode (FilterRule *fr, xmlNodePtr node, RuleContext *f)
{
	xmlNodePtr work;
	gchar *grouping;
	gchar *source;

	if (fr->name) {
		g_free (fr->name);
		fr->name = NULL;
	}

	grouping = (gchar *)xmlGetProp (node, (const guchar *)"enabled");
	if (!grouping)
		fr->enabled = TRUE;
	else {
		fr->enabled = strcmp (grouping, "false") != 0;
		xmlFree (grouping);
	}

	grouping = (gchar *)xmlGetProp (node, (const guchar *)"grouping");
	if (!strcmp (grouping, "any"))
		fr->grouping = FILTER_GROUP_ANY;
	else
		fr->grouping = FILTER_GROUP_ALL;
	xmlFree (grouping);

	fr->threading = FILTER_THREAD_NONE;
	if (f->flags & RULE_CONTEXT_THREADING
	    && (grouping = (gchar *)xmlGetProp (node, (const guchar *)"threading"))) {
		if (!strcmp(grouping, "all"))
			fr->threading = FILTER_THREAD_ALL;
		else if (!strcmp(grouping, "replies"))
			fr->threading = FILTER_THREAD_REPLIES;
		else if (!strcmp(grouping, "replies_parents"))
			fr->threading = FILTER_THREAD_REPLIES_PARENTS;
		else if (!strcmp(grouping, "single"))
			fr->threading = FILTER_THREAD_SINGLE;
		xmlFree (grouping);
	}

	g_free (fr->source);
	source = (gchar *)xmlGetProp (node, (const guchar *)"source");
	if (source) {
		fr->source = g_strdup (source);
		xmlFree (source);
	} else {
		/* default filter type */
		fr->source = g_strdup ("incoming");
	}

	work = node->children;
	while (work) {
		if (!strcmp ((gchar *)work->name, "partset")) {
			load_set (work, fr, f);
		} else if (!strcmp ((gchar *)work->name, "title") || !strcmp ((gchar *)work->name, "_title")) {
			if (!fr->name) {
				gchar *str, *decstr = NULL;

				str = (gchar *)xmlNodeGetContent (work);
				if (str) {
					decstr = g_strdup (_(str));
					xmlFree (str);
				}
				fr->name = decstr;
			}
		}
		work = work->next;
	}

	return 0;
}

static void
rule_copy (FilterRule *dest, FilterRule *src)
{
	GList *node;

	dest->enabled = src->enabled;

	g_free (dest->name);
	dest->name = g_strdup (src->name);

	g_free (dest->source);
	dest->source = g_strdup (src->source);

	dest->grouping = src->grouping;
	dest->threading = src->threading;

	if (dest->parts) {
		g_list_foreach (dest->parts, (GFunc) g_object_unref, NULL);
		g_list_free (dest->parts);
		dest->parts = NULL;
	}

	node = src->parts;
	while (node) {
		FilterPart *part;

		part = filter_part_clone (node->data);
		dest->parts = g_list_append (dest->parts, part);
		node = node->next;
	}
}

void
filter_rule_copy (FilterRule *dest, FilterRule *src)
{
	g_return_if_fail (IS_FILTER_RULE (dest));
	g_return_if_fail (IS_FILTER_RULE (src));

	FILTER_RULE_GET_CLASS (dest)->copy (dest, src);

	filter_rule_emit_changed (dest);
}

void
filter_rule_add_part (FilterRule *fr, FilterPart *fp)
{
	g_return_if_fail (IS_FILTER_RULE (fr));
	g_return_if_fail (IS_FILTER_PART (fp));

	fr->parts = g_list_append (fr->parts, fp);

	filter_rule_emit_changed (fr);
}

void
filter_rule_remove_part (FilterRule *fr, FilterPart *fp)
{
	g_return_if_fail (IS_FILTER_RULE (fr));
	g_return_if_fail (IS_FILTER_PART (fp));

	fr->parts = g_list_remove (fr->parts, fp);

	filter_rule_emit_changed (fr);
}

void
filter_rule_replace_part (FilterRule *fr, FilterPart *fp, FilterPart *new)
{
	GList *l;

	g_return_if_fail (IS_FILTER_RULE (fr));
	g_return_if_fail (IS_FILTER_PART (fp));
	g_return_if_fail (IS_FILTER_PART (new));

	l = g_list_find (fr->parts, fp);
	if (l) {
		l->data = new;
	} else {
		fr->parts = g_list_append (fr->parts, new);
	}

	filter_rule_emit_changed (fr);
}

void
filter_rule_build_code (FilterRule *fr, GString *out)
{
	g_return_if_fail (IS_FILTER_RULE (fr));
	g_return_if_fail (out != NULL);

	FILTER_RULE_GET_CLASS (fr)->build_code (fr, out);

	d(printf ("build_code: [%s](%d)", out->str, out->len));
}

void
filter_rule_emit_changed(FilterRule *fr)
{
	g_return_if_fail (IS_FILTER_RULE (fr));

	if (fr->priv->frozen == 0)
		g_signal_emit (fr, signals[CHANGED], 0);
}

static void
build_code (FilterRule *fr, GString *out)
{
	switch (fr->threading) {
	case FILTER_THREAD_NONE:
		break;
	case FILTER_THREAD_ALL:
		g_string_append(out, " (match-threads \"all\" ");
		break;
	case FILTER_THREAD_REPLIES:
		g_string_append(out, " (match-threads \"replies\" ");
		break;
	case FILTER_THREAD_REPLIES_PARENTS:
		g_string_append(out, " (match-threads \"replies_parents\" ");
		break;
	case FILTER_THREAD_SINGLE:
		g_string_append(out, " (match-threads \"single\" ");
		break;
	}

	switch (fr->grouping) {
	case FILTER_GROUP_ALL:
		g_string_append (out, " (and\n  ");
		break;
	case FILTER_GROUP_ANY:
		g_string_append (out, " (or\n  ");
		break;
	default:
		g_warning ("Invalid grouping");
	}

	filter_part_build_code_list (fr->parts, out);
	g_string_append (out, ")\n");

	if (fr->threading != FILTER_THREAD_NONE)
		g_string_append (out, ")\n");
}

static void
fr_grouping_changed(GtkWidget *w, FilterRule *fr)
{
	fr->grouping = gtk_combo_box_get_active (GTK_COMBO_BOX (w));
}

static void
fr_threading_changed(GtkWidget *w, FilterRule *fr)
{
	fr->threading = gtk_combo_box_get_active (GTK_COMBO_BOX (w));
}

struct _part_data {
	FilterRule *fr;
	RuleContext *f;
	FilterPart *part;
	GtkWidget *partwidget, *container;
};

static void
part_combobox_changed (GtkComboBox *combobox, struct _part_data *data)
{
	FilterPart *part = NULL;
	FilterPart *newpart;
	gint index, i;

	index = gtk_combo_box_get_active (combobox);
	for (i = 0, part = rule_context_next_part (data->f, part); part && i < index; i++, part = rule_context_next_part (data->f, part)) {
		/* traverse until reached index */
	}

	g_return_if_fail (part != NULL);
	g_return_if_fail (i == index);

	/* dont update if we haven't changed */
	if (!strcmp (part->title, data->part->title))
		return;

	/* here we do a widget shuffle, throw away the old widget/rulepart,
	   and create another */
	if (data->partwidget)
		gtk_container_remove (GTK_CONTAINER (data->container), data->partwidget);

	newpart = filter_part_clone (part);
	filter_part_copy_values (newpart, data->part);
	filter_rule_replace_part (data->fr, data->part, newpart);
	g_object_unref (data->part);
	data->part = newpart;
	data->partwidget = filter_part_get_widget (newpart);
	if (data->partwidget)
		gtk_box_pack_start (GTK_BOX (data->container), data->partwidget, TRUE, TRUE, 0);
}

static GtkWidget *
get_rule_part_widget (RuleContext *f, FilterPart *newpart, FilterRule *fr)
{
	FilterPart *part = NULL;
	GtkWidget *combobox;
	GtkWidget *hbox;
	GtkWidget *p;
	gint index = 0, current = 0;
	struct _part_data *data;

	data = g_malloc0 (sizeof (*data));
	data->fr = fr;
	data->f = f;
	data->part = newpart;

	hbox = gtk_hbox_new (FALSE, 0);
	/* only set to automatically clean up the memory */
	g_object_set_data_full ((GObject *) hbox, "data", data, g_free);

	p = filter_part_get_widget (newpart);

	data->partwidget = p;
	data->container = hbox;

	combobox = gtk_combo_box_new_text ();

	/* sigh, this is a little ugly */
	while ((part = rule_context_next_part (f, part))) {
		gtk_combo_box_append_text (GTK_COMBO_BOX (combobox), _(part->title));

		if (!strcmp (newpart->title, part->title))
			current = index;

		index++;
	}

	gtk_combo_box_set_active (GTK_COMBO_BOX (combobox), current);
	g_signal_connect (combobox, "changed", G_CALLBACK (part_combobox_changed), data);
	gtk_widget_show (combobox);

	gtk_box_pack_start (GTK_BOX (hbox), combobox, FALSE, FALSE, 0);
	if (p)
		gtk_box_pack_start (GTK_BOX (hbox), p, TRUE, TRUE, 0);

	gtk_widget_show_all (hbox);

	return hbox;
}

struct _rule_data {
	FilterRule *fr;
	RuleContext *f;
	GtkWidget *parts;
};

static void
less_parts (GtkWidget *button, struct _rule_data *data)
{
	FilterPart *part;
	GtkWidget *rule;

	if (g_list_length (data->fr->parts) < 1)
		return;

	rule = g_object_get_data ((GObject *) button, "rule");
	part = g_object_get_data ((GObject *) rule, "part");

	/* remove the part from the list */
	filter_rule_remove_part (data->fr, part);
	g_object_unref (part);

	/* and from the display */
	gtk_container_remove (GTK_CONTAINER (data->parts), rule);
	gtk_container_remove (GTK_CONTAINER (data->parts), button);
}

static void
attach_rule (GtkWidget *rule, struct _rule_data *data, FilterPart *part, gint row)
{
	GtkWidget *remove;

	gtk_table_attach (GTK_TABLE (data->parts), rule, 0, 1, row, row + 1,
			  GTK_EXPAND | GTK_FILL, 0, 0, 0);

	remove = gtk_button_new_from_stock (GTK_STOCK_REMOVE);
	g_object_set_data ((GObject *) remove, "rule", rule);
	g_object_set_data ((GObject *) rule, "part", part);
	/*gtk_button_set_relief (GTK_BUTTON (remove), GTK_RELIEF_NONE);*/
	g_signal_connect (remove, "clicked", G_CALLBACK (less_parts), data);
	gtk_table_attach (GTK_TABLE (data->parts), remove, 1, 2, row, row + 1,
			  0, 0, 0, 0);

	gtk_widget_show (remove);
}

static void
do_grab_focus_cb (GtkWidget *widget, gpointer data)
{
	gboolean *done = (gboolean *) data;

	if (*done)
		return;

	if (widget && GTK_WIDGET_CAN_FOCUS (widget)) {
		*done = TRUE;
		gtk_widget_grab_focus (widget);
	}
}

static void
more_parts (GtkWidget *button, struct _rule_data *data)
{
	FilterPart *new;

	/* first make sure that the last part is ok */
	if (data->fr->parts) {
		FilterPart *part;
		GList *l;

		l = g_list_last (data->fr->parts);
		part = l->data;
		if (!filter_part_validate (part))
			return;
	}

	/* create a new rule entry, use the first type of rule */
	new = rule_context_next_part (data->f, NULL);
	if (new) {
		GtkWidget *w;
		gint rows;

		new = filter_part_clone (new);
		filter_rule_add_part (data->fr, new);
		w = get_rule_part_widget (data->f, new, data->fr);

		rows = GTK_TABLE (data->parts)->nrows;
		gtk_table_resize (GTK_TABLE (data->parts), rows + 1, 2);
		attach_rule (w, data, new, rows);

		if (GTK_IS_CONTAINER (w)) {
			gboolean done = FALSE;

			gtk_container_foreach (GTK_CONTAINER (w), do_grab_focus_cb, &done);
		} else
			gtk_widget_grab_focus (w);

		/* also scroll down to see new part */
		w = (GtkWidget*) g_object_get_data (G_OBJECT (button), "scrolled-window");
		if (w) {
			GtkAdjustment *adjustment;

			adjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (w));
			if (adjustment)
				gtk_adjustment_set_value (adjustment, adjustment->upper);

		}
	}
}

static void
name_changed (GtkEntry *entry, FilterRule *fr)
{
	g_free (fr->name);
	fr->name = g_strdup (gtk_entry_get_text (entry));
}

GtkWidget *
filter_rule_get_widget (FilterRule *fr, RuleContext *rc)
{
	return FILTER_RULE_GET_CLASS (fr)->get_widget (fr, rc);
}

static void
grab_focus (GtkWidget *entry, gpointer data)
{
	gtk_widget_grab_focus (entry);
}

static GtkWidget *
get_widget (FilterRule *fr, struct _RuleContext *f)
{
	GtkWidget *hbox, *vbox, *parts, *inframe;
	GtkWidget *add, *label, *name, *w;
	GtkWidget *combobox;
	GtkWidget *scrolledwindow;
	GtkObject *hadj, *vadj;
	GList *l;
	gchar *text;
	FilterPart *part;
	struct _rule_data *data;
	gint rows, i;

	/* this stuff should probably be a table, but the
	   rule parts need to be a vbox */
	vbox = gtk_vbox_new (FALSE, 6);

	label = gtk_label_new_with_mnemonic (_("R_ule name:"));
	name = gtk_entry_new ();
	gtk_label_set_mnemonic_widget ((GtkLabel *)label, name);

	if (!fr->name) {
		fr->name = g_strdup (_("Untitled"));
		gtk_entry_set_text (GTK_ENTRY (name), fr->name);
		/* FIXME: do we want the following code in the future? */
		/*gtk_editable_select_region (GTK_EDITABLE (name), 0, -1);*/
	} else {
		gtk_entry_set_text (GTK_ENTRY (name), fr->name);
	}

	/* evil kludgy hack because gtk sucks */
	g_signal_connect (name, "realize", G_CALLBACK (grab_focus), name);

	hbox = gtk_hbox_new (FALSE, 12);
	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
	gtk_box_pack_start (GTK_BOX (hbox), name, TRUE, TRUE, 0);
	gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
	g_signal_connect (name, "changed", G_CALLBACK (name_changed), fr);
	gtk_widget_show (label);
	gtk_widget_show (hbox);

	hbox = gtk_hbox_new (FALSE, 12);
	gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
	gtk_widget_show (hbox);

	text = g_strdup_printf("<b>%s</b>", _("Find items that meet the following conditions"));
	label = gtk_label_new (text);
	gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
	gtk_misc_set_alignment (GTK_MISC (label), 0, 0.5);
	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
	gtk_widget_show (label);
	g_free(text);

	hbox = gtk_hbox_new (FALSE, 12);
	gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, TRUE, 0);
	gtk_widget_show (hbox);

	label = gtk_label_new ("");
	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
	gtk_widget_show (label);

	inframe = gtk_vbox_new (FALSE, 6);
	gtk_box_pack_start (GTK_BOX (hbox), inframe, TRUE, TRUE, 0);

	/* this is the parts table, it should probably be inside a scrolling list */
	rows = g_list_length (fr->parts);
	parts = gtk_table_new (rows, 2, FALSE);

	/* data for the parts part of the display */
	data = g_malloc0 (sizeof (*data));
	data->f = f;
	data->fr = fr;
	data->parts = parts;

	/* only set to automatically clean up the memory */
	g_object_set_data_full ((GObject *) vbox, "data", data, g_free);

	hbox = gtk_hbox_new (FALSE, 3);

	add = gtk_button_new_with_mnemonic (_("A_dd Condition"));
	gtk_button_set_image (GTK_BUTTON (add), gtk_image_new_from_stock (GTK_STOCK_ADD, GTK_ICON_SIZE_BUTTON));
	g_signal_connect (add, "clicked", G_CALLBACK (more_parts), data);
	gtk_box_pack_start (GTK_BOX (hbox), add, FALSE, FALSE, 0);

	if (f->flags & RULE_CONTEXT_GROUPING) {
		const gchar *thread_types[] = { N_("If all conditions are met"), N_("If any conditions are met") };

		label = gtk_label_new_with_mnemonic (_("_Find items:"));
		combobox = gtk_combo_box_new_text ();

		for (i=0;i<2;i++) {
			gtk_combo_box_append_text (GTK_COMBO_BOX (combobox), _(thread_types[i]));
		}

		gtk_label_set_mnemonic_widget ((GtkLabel *)label, combobox);
		gtk_combo_box_set_active (GTK_COMBO_BOX (combobox), fr->grouping);
		gtk_widget_show (combobox);

		gtk_box_pack_end (GTK_BOX (hbox), combobox, FALSE, FALSE, 0);
		gtk_box_pack_end (GTK_BOX (hbox), label, FALSE, FALSE, 0);

		g_signal_connect (combobox, "changed", G_CALLBACK (fr_grouping_changed), fr);
	}

	if (f->flags & RULE_CONTEXT_THREADING) {
		const gchar *thread_types[] = { N_("None"), N_("All related"), N_("Replies"), N_("Replies and parents"), N_("No reply or parent") };

		label = gtk_label_new_with_mnemonic (_("I_nclude threads"));
		combobox = gtk_combo_box_new_text ();

		for (i=0;i<5;i++) {
			gtk_combo_box_append_text (GTK_COMBO_BOX (combobox), _(thread_types[i]));
		}

		gtk_label_set_mnemonic_widget ((GtkLabel *)label, combobox);
		gtk_combo_box_set_active (GTK_COMBO_BOX (combobox), fr->threading);
		gtk_widget_show (combobox);

		gtk_box_pack_end (GTK_BOX (hbox), combobox, FALSE, FALSE, 0);
		gtk_box_pack_end (GTK_BOX (hbox), label, FALSE, FALSE, 0);

		g_signal_connect (combobox, "changed", G_CALLBACK (fr_threading_changed), fr);
	}

	gtk_box_pack_start (GTK_BOX (inframe), hbox, FALSE, FALSE, 3);

	l = fr->parts;
	i = 0;
	while (l) {
		part = l->data;
		d(printf ("adding rule %s\n", part->title));
		w = get_rule_part_widget (f, part, fr);
		attach_rule (w, data, part, i++);
		l = g_list_next (l);
	}

	hadj = gtk_adjustment_new (0.0, 0.0, 1.0, 1.0, 1.0, 1.0);
	vadj = gtk_adjustment_new (0.0, 0.0, 1.0, 1.0, 1.0, 1.0);
	scrolledwindow = gtk_scrolled_window_new (GTK_ADJUSTMENT (hadj), GTK_ADJUSTMENT (vadj));
	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow),
					GTK_POLICY_AUTOMATIC,
					GTK_POLICY_AUTOMATIC);

	gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scrolledwindow), parts);

	gtk_box_pack_start (GTK_BOX (inframe), scrolledwindow, TRUE, TRUE, 3);

	gtk_widget_show_all (vbox);

	g_object_set_data (G_OBJECT (add), "scrolled-window", scrolledwindow);

	return vbox;
}

FilterRule *
filter_rule_next_list (GList *l, FilterRule *last, const gchar *source)
{
	GList *node = l;

	if (last != NULL) {
		node = g_list_find (node, last);
		if (node == NULL)
			node = l;
		else
			node = node->next;
	}

	if (source) {
		while (node) {
			FilterRule *rule = node->data;

			if (rule->source && strcmp (rule->source, source) == 0)
				break;
			node = node->next;
		}
	}

	if (node)
		return node->data;

	return NULL;
}

FilterRule *
filter_rule_find_list (GList * l, const gchar *name, const gchar *source)
{
	while (l) {
		FilterRule *rule = l->data;

		if (strcmp (rule->name, name) == 0)
			if (source == NULL || (rule->source != NULL && strcmp (rule->source, source) == 0))
				return rule;
		l = l->next;
	}

	return NULL;
}

#ifdef FOR_TRANSLATIONS_ONLY

static gchar *list[] = {
  N_("Incoming"), N_("Outgoing")
};
#endif
