path: root/filter/score-rule.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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */


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

#include <string.h>

#include <gtk/gtk.h>
#include <libgnome/gnome-i18n.h>

#include "score-rule.h"

static xmlNodePtr xml_encode(FilterRule *);
static int xml_decode(FilterRule *, xmlNodePtr, struct _RuleContext *f);
/*static void build_code(FilterRule *, GString *out);*/
static GtkWidget *get_widget(FilterRule *fr, struct _RuleContext *f);

static void score_rule_class_init (ScoreRuleClass *klass);
static void score_rule_init (ScoreRule *sr);
static void score_rule_finalise (GObject *obj);


static FilterRuleClass *parent_class = NULL;


GType
score_rule_get_type (void)
{
    static GType type = 0;
    
    if (!type) {
        static const GTypeInfo info = {
            sizeof (ScoreRuleClass),
            NULL, /* base_class_init */
            NULL, /* base_class_finalize */
            (GClassInitFunc) score_rule_class_init,
            NULL, /* class_finalize */
            NULL, /* class_data */
            sizeof (ScoreRule),
            0,    /* n_preallocs */
            (GInstanceInitFunc) score_rule_init,
        };
        
        type = g_type_register_static (FILTER_TYPE_RULE, "ScoreRule", &info, 0);
    }
    
    return type;
}

static void
score_rule_class_init (ScoreRuleClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
    FilterRuleClass *rule_class = (FilterRuleClass *) klass;
    
    parent_class = g_type_class_ref (FILTER_TYPE_RULE);
    
    object_class->finalize = score_rule_finalise;
    
    /* override methods */
    rule_class->xml_encode = xml_encode;
    rule_class->xml_decode = xml_decode;
/*  rule_class->build_code = build_code;*/
    rule_class->get_widget = get_widget;
}

static void
score_rule_init (ScoreRule *sr)
{
    ;
}

static void
score_rule_finalise (GObject *obj)
{
        G_OBJECT_CLASS (parent_class)->finalize (obj);
}

/**
 * score_rule_new:
 *
 * Create a new ScoreRule object.
 * 
 * Return value: A new #ScoreRule object.
 **/
ScoreRule *
score_rule_new (void)
{
    return (ScoreRule *) g_object_new (SCORE_TYPE_RULE, NULL, NULL);
}

static xmlNodePtr
xml_encode (FilterRule *fr)
{
    ScoreRule *sr = (ScoreRule *)fr;
    xmlNodePtr node, value;
    char number[16];
    
    node = FILTER_RULE_CLASS (parent_class)->xml_encode (fr);
    sprintf (number, "%d", sr->score);
    value = xmlNewNode (NULL, "score");
    xmlSetProp (value, "value", number);
    xmlAddChild (node, value);
    
    return node;
}

static int
xml_decode (FilterRule *fr, xmlNodePtr node, struct _RuleContext *f)
{
    ScoreRule *sr = (ScoreRule *) fr;
    xmlNodePtr value;
    int result;
    char *str;
    
    result = FILTER_RULE_CLASS (parent_class)->xml_decode (fr, node, f);
    if (result != 0)
        return result;
    
    value = node->children;
    while (value) {
        if (!strcmp (value->name, "score")) {
            str = xmlGetProp (value, "value");
            sscanf (str, "%d", &sr->score);
            xmlFree (str);
            
            /* score range is -3 to +3 */
            if (sr->score > 3)
                sr->score = 3;
            else if (sr->score < -3)
                sr->score = -3;
        }
        value = value->next;
    }
    
    return 0;
}

/*static void build_code(FilterRule *fr, GString *out)
{
}*/

static void
spin_changed (GtkAdjustment *adj, ScoreRule *sr)
{
    sr->score = adj->value;
}

static GtkWidget *
get_widget (FilterRule *fr, struct _RuleContext *f)
{
    GtkWidget *widget;
    GtkWidget *frame;
    GtkWidget *label;
    GtkWidget *hbox;
    GtkAdjustment *adj;
    ScoreRule *sr = (ScoreRule *)fr;
    GtkWidget *spin;
    
        widget = FILTER_RULE_CLASS (parent_class)->get_widget (fr, f);
    
    frame = gtk_frame_new (_("Score"));
    hbox = gtk_hbox_new (FALSE, 3);
    label = gtk_label_new (_("Score"));
    
    gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 3);
    adj = (GtkAdjustment *) gtk_adjustment_new ((float) sr->score, -3.0, 3.0, 1.0, 1.0, 1.0);
    g_signal_connect (adj, "value_changed", G_CALLBACK (spin_changed), sr);
    
    spin = gtk_spin_button_new (adj, 1.0, 0);
    gtk_box_pack_start (GTK_BOX (hbox), spin, FALSE, FALSE, 3);
    gtk_container_add (GTK_CONTAINER (frame), hbox);
    
    gtk_widget_show_all (frame);
    
    gtk_box_pack_start (GTK_BOX (widget), frame, FALSE, FALSE, 3);
    
    return widget;
}