path: root/filter/filter-filter.c

/*
 *  Copyright (C) 2000-2001 Ximian Inc.
 *
 *  Authors: Not Zed <notzed@ximian.com>
 *           Jeffrey Stedfast <fejj@ximian.com>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public License
 *  as published by the Free Software Foundation; either version 2 of
 *  the License, or (at your option) any later version.
 *
 *  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 Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <config.h>

#include <string.h>
#include <glib.h>
#include <gtk/gtkframe.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkmenuitem.h>
#include <gtk/gtkoptionmenu.h>
#include <gtk/gtkscrolledwindow.h>
#include <gtk/gtktable.h>
#include <libgnome/gnome-defs.h>
#include <libgnome/gnome-i18n.h>
#include <libgnomeui/gnome-stock.h>
#include <gal/widgets/e-unicode.h>

#include "filter-filter.h"
#include "filter-context.h"

#define d(x)

static int validate(FilterRule *);
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 filter_filter_class_init (FilterFilterClass *class);
static void filter_filter_init (FilterFilter *gspaper);
static void filter_filter_finalise (GtkObject *obj);

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

struct _FilterFilterPrivate {
};

static FilterRuleClass *parent_class;

enum {
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };

guint
filter_filter_get_type (void)
{
    static guint type = 0;
    
    if (!type) {
        GtkTypeInfo type_info = {
            "FilterFilter",
            sizeof(FilterFilter),
            sizeof(FilterFilterClass),
            (GtkClassInitFunc)filter_filter_class_init,
            (GtkObjectInitFunc)filter_filter_init,
            (GtkArgSetFunc)NULL,
            (GtkArgGetFunc)NULL
        };
        
        type = gtk_type_unique(filter_rule_get_type (), &type_info);
    }
    
    return type;
}

static void
filter_filter_class_init (FilterFilterClass *class)
{
    GtkObjectClass *object_class;
    FilterRuleClass *filter_rule = (FilterRuleClass *)class;
    
    object_class = (GtkObjectClass *)class;
    parent_class = gtk_type_class (filter_rule_get_type ());
    
    object_class->finalize = filter_filter_finalise;
    
    /* override methods */
    filter_rule->validate = validate;
    filter_rule->xml_encode = xml_encode;
    filter_rule->xml_decode = xml_decode;
    /*filter_rule->build_code = build_code;*/
    filter_rule->get_widget = get_widget;
    
    /* signals */
    
    gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);
}

static void
filter_filter_init (FilterFilter *o)
{
    o->priv = g_malloc0 (sizeof (*o->priv));
}

static void
unref_list (GList *l)
{
    while (l) {
        gtk_object_unref (GTK_OBJECT (l->data));
        l = g_list_next (l);
    }
}

static void
filter_filter_finalise (GtkObject *obj)
{
    FilterFilter *o = (FilterFilter *)obj;
    
    unref_list (o->actions);
    
        ((GtkObjectClass *)(parent_class))->finalize (obj);
}

/**
 * filter_filter_new:
 *
 * Create a new FilterFilter object.
 * 
 * Return value: A new #FilterFilter object.
 **/
FilterFilter *
filter_filter_new (void)
{
    FilterFilter *o = (FilterFilter *)gtk_type_new(filter_filter_get_type ());
    return o;
}

void
filter_filter_add_action (FilterFilter *fr, FilterPart *fp)
{
    fr->actions = g_list_append (fr->actions, fp);
}

void
filter_filter_remove_action (FilterFilter *fr, FilterPart *fp)
{
    fr->actions = g_list_remove (fr->actions, fp);
}

void
filter_filter_replace_action (FilterFilter *fr, FilterPart *fp, FilterPart *new)
{
    GList *l;
    
    l = g_list_find (fr->actions, fp);
    if (l) {
        l->data = new;
    } else {
        fr->actions = g_list_append (fr->actions, new);
    }
}

void
filter_filter_build_action (FilterFilter *fr, GString *out)
{
    g_string_append (out, "(begin\n");
    filter_part_build_code_list (fr->actions, out);
    g_string_append (out, ")\n");
}

static int
validate(FilterRule *fr)
{
    int valid;
    GList *parts;
    FilterFilter *ff = (FilterFilter *)fr;

        valid = ((FilterRuleClass *)(parent_class))->validate(fr);

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

    return valid;
}

static xmlNodePtr
xml_encode (FilterRule *fr)
{
    xmlNodePtr node, set, work;
    GList *l;
    FilterFilter *ff = (FilterFilter *)fr;
    
        node = ((FilterRuleClass *)(parent_class))->xml_encode (fr);
    g_assert (node != NULL);
    set = xmlNewNode (NULL, "actionset");
    xmlAddChild (node, set);
    l = ff->actions;
    while (l) {
        work = filter_part_xml_encode ((FilterPart *)l->data);
        xmlAddChild (set, work);
        l = g_list_next (l);
    }
    
    return node;

}

static void
load_set (xmlNodePtr node, FilterFilter *ff, RuleContext *f)
{
    xmlNodePtr work;
    char *rulename;
    FilterPart *part;
    
    work = node->childs;
    while (work) {
        if (!strcmp (work->name, "part")) {
            rulename = xmlGetProp (work, "name");
            part = filter_context_find_action ((FilterContext *)f, rulename);
            if (part) {
                part = filter_part_clone (part);
                filter_part_xml_decode (part, work);
                filter_filter_add_action (ff, part);
            } else {
                g_warning ("cannot find rule part '%s'\n", rulename);
            }
            xmlFree (rulename);
        } else {
            g_warning ("Unknwon xml node in part: %s", work->name);
        }
        work = work->next;
    }
}

static int
xml_decode (FilterRule *fr, xmlNodePtr node, struct _RuleContext *f)
{
    xmlNodePtr work;
    FilterFilter *ff = (FilterFilter *)fr;
    int result;
    
        result = ((FilterRuleClass *)(parent_class))->xml_decode (fr, node, f);
    if (result != 0)
        return result;
    
    work = node->childs;
    while (work) {
        if (!strcmp (work->name, "actionset")) {
            load_set (work, ff, f);
        }
        work = work->next;
    }
    
    return 0;
}

/*static void build_code(FilterRule *fr, GString *out)
{
        return ((FilterRuleClass *)(parent_class))->build_code(fr, out);
}*/

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

static void
option_activate (GtkMenuItem *item, struct _part_data *data)
{
    FilterPart *part = gtk_object_get_data (GTK_OBJECT (item), "part");
    FilterPart *newpart;
    
    /* 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_filter_replace_action ((FilterFilter *)data->fr, data->part, newpart);
    gtk_object_unref (GTK_OBJECT (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, FALSE, FALSE, 0);
    
    gtk_object_set_data (GTK_OBJECT (data->container), "part", newpart);
}

static GtkWidget *
get_rule_part_widget (FilterContext *f, FilterPart *newpart, FilterRule *fr)
{
    FilterPart *part = NULL;
    GtkWidget *menu;
    GtkWidget *item;
    GtkWidget *omenu;
    GtkWidget *hbox;
    GtkWidget *p;
    int 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);
    p = filter_part_get_widget (newpart);
    
    data->partwidget = p;
    data->container = hbox;
    
    menu = gtk_menu_new ();
    while ((part = filter_context_next_action (f, part))) {
        item = gtk_menu_item_new_with_label (_(part->title));
        
        gtk_object_set_data (GTK_OBJECT (item), "part", part);
        gtk_signal_connect (GTK_OBJECT (item), "activate", option_activate, data);
        gtk_menu_append (GTK_MENU (menu), item);
        gtk_widget_show (item);
        
        if (!strcmp (newpart->title, part->title)) {
            current = index;
        }
        index++;
    }
    
    omenu = gtk_option_menu_new ();
    gtk_option_menu_set_menu (GTK_OPTION_MENU (omenu), menu);
    gtk_option_menu_set_history (GTK_OPTION_MENU (omenu), current);
    gtk_widget_show (omenu);
    
    gtk_box_pack_start (GTK_BOX (hbox), omenu, FALSE, FALSE, 0);
    if (p) {
        gtk_box_pack_start (GTK_BOX (hbox), p, FALSE, FALSE, 0);
    }
    gtk_widget_show_all (hbox);
    
    return hbox;
}

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

static void
less_parts (GtkWidget *button, struct _rule_data *data)
{
    FilterPart *part;
    GtkWidget *rule;
    GList *l;
    
    l = ((FilterFilter *)data->fr)->actions;
    if (g_list_length (l) < 2)
        return;
    
    rule = gtk_object_get_data (GTK_OBJECT (button), "rule");
    part = gtk_object_get_data (GTK_OBJECT (rule), "part");
    
    /* remove the part from the list */
    filter_filter_remove_action ((FilterFilter *)data->fr, part);
    gtk_object_unref (GTK_OBJECT (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, int row)
{
    GtkWidget *remove;
    GtkWidget *pixmap;
    
    gtk_table_attach (GTK_TABLE (data->parts), rule, 0, 1, row, row + 1,
              GTK_EXPAND | GTK_FILL, 0, 0, 0);
    
    pixmap = gnome_stock_new_with_icon (GNOME_STOCK_PIXMAP_REMOVE);
    remove = gnome_pixmap_button (pixmap, _("Remove"));
    gtk_object_set_data (GTK_OBJECT (remove), "rule", rule);
    gtk_object_set_data (GTK_OBJECT (rule), "part", part);
    /*gtk_button_set_relief (GTK_BUTTON (remove), GTK_RELIEF_NONE);*/
    gtk_signal_connect (GTK_OBJECT (remove), "clicked", 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
more_parts (GtkWidget *button, struct _rule_data *data)
{
    FilterPart *new;
    
    /* create a new rule entry, use the first type of rule */
    new = filter_context_next_action ((FilterContext *)data->f, NULL);
    if (new) {
        GtkWidget *w;
        guint16 rows;
        
        new = filter_part_clone (new);
        filter_filter_add_action ((FilterFilter *)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);
    }
}

static GtkWidget *
get_widget (FilterRule *fr, struct _RuleContext *f)
{
    GtkWidget *widget;
    GtkWidget *parts, *inframe;
    GtkWidget *hbox;
    GtkWidget *add, *pixmap;
    GtkWidget *w;
    GtkWidget *frame;
    GtkWidget *scrolledwindow;
    GtkObject *hadj, *vadj;
    GList *l;
    FilterPart *part;
    struct _rule_data *data;
    FilterFilter *ff = (FilterFilter *)fr;
    gint rows, i = 0;
    
        widget = ((FilterRuleClass *)(parent_class))->get_widget (fr, f);
    
    /* and now for the action area */
    frame = gtk_frame_new (_("Then"));
    inframe = gtk_vbox_new (FALSE, 3);
    gtk_container_add (GTK_CONTAINER (frame), inframe);
    
    rows = g_list_length (ff->actions);
    parts = gtk_table_new (rows, 2, FALSE);
    data = g_malloc0 (sizeof (*data));
    data->f = (FilterContext *)f;
    data->fr = fr;
    data->parts = parts;
    
    hbox = gtk_hbox_new (FALSE, 3);
    
    pixmap = gnome_stock_new_with_icon (GNOME_STOCK_PIXMAP_ADD);
    add = gnome_pixmap_button (pixmap, _("Add action"));
    gtk_button_set_relief (GTK_BUTTON (add), GTK_RELIEF_NONE);
    gtk_signal_connect (GTK_OBJECT (add), "clicked", more_parts, data);
    gtk_box_pack_start (GTK_BOX (hbox), add, FALSE, FALSE, 3);
    
    gtk_box_pack_start (GTK_BOX (inframe), hbox, FALSE, FALSE, 3);
    
    l = ff->actions;
    while (l) {
        part = l->data;
        d(printf ("adding action %s\n", part->title));
        w = get_rule_part_widget ((FilterContext *)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_box_pack_start (GTK_BOX (inframe), parts, FALSE, FALSE, 3);*/
    
    gtk_widget_show_all (frame);
    
    gtk_box_pack_start (GTK_BOX (widget), frame, TRUE, TRUE, 3);
    
    return widget;
}