path: root/filter/filter-part.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 <stdlib.h>
#include <string.h>

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

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

#define d(x)

static void filter_part_class_init (FilterPartClass *klass);
static void filter_part_init (FilterPart *fp);
static void filter_part_finalise (GObject *obj);


static GObjectClass *parent_class = NULL;


GType
filter_part_get_type (void)
{
    static GType type = 0;
    
    if (!type) {
        static const GTypeInfo info = {
            sizeof (FilterPartClass),
            NULL, /* base_class_init */
            NULL, /* base_class_finalize */
            (GClassInitFunc) filter_part_class_init,
            NULL, /* class_finalize */
            NULL, /* class_data */
            sizeof (FilterPart),
            0,    /* n_preallocs */
            (GInstanceInitFunc) filter_part_init,
        };
        
        type = g_type_register_static (G_TYPE_OBJECT, "FilterPart", &info, 0);
    }
    
    return type;
}

static void
filter_part_class_init (FilterPartClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
    
    parent_class = g_type_class_ref (G_TYPE_OBJECT);
    
    object_class->finalize = filter_part_finalise;
}

static void
filter_part_init (FilterPart *fp)
{
    ;
}

static void
filter_part_finalise (GObject *obj)
{
    FilterPart *fp = (FilterPart *) obj;
    GList *l;
    
    l = fp->elements;
    while (l) {
        g_object_unref (l->data);
        l = l->next;
    }
    
    g_list_free (fp->elements);
    g_free (fp->name);
    g_free (fp->title);
    g_free (fp->code);
    
        G_OBJECT_CLASS (parent_class)->finalize (obj);
}

/**
 * filter_part_new:
 *
 * Create a new FilterPart object.
 * 
 * Return value: A new #FilterPart object.
 **/
FilterPart *
filter_part_new (void)
{
    return (FilterPart *) g_object_new (FILTER_TYPE_PART, NULL, NULL);
}

gboolean
filter_part_validate (FilterPart *fp)
{
    gboolean correct = TRUE;
    GList *l;
    
    l = fp->elements;
    while (l && correct) {
        FilterElement *fe = l->data;
        
            correct = filter_element_validate (fe);
        
        l = l->next;
    }
    
    return correct;
}

int
filter_part_eq (FilterPart *fp, FilterPart *fc)
{
    int truth;
    GList *al, *bl;
    
    truth = ((fp->name && fc->name && strcmp(fp->name, fc->name) == 0)
         || (fp->name == NULL && fc->name == NULL))
        && ((fp->title && fc->title && strcmp(fp->title, fc->title) == 0)
            || (fp->title == NULL && fc->title == NULL))
        && ((fp->code && fc->code && strcmp(fp->code, fc->code) == 0)
            || (fp->code == NULL && fc->code == NULL));
    
    al = fp->elements;
    bl = fc->elements;
    while (truth && al && bl) {
        FilterElement *a = al->data, *b = bl->data;
        
        truth = filter_element_eq(a, b);
        
        al = al->next;
        bl = bl->next;
    }
    
    return truth && al == NULL && bl == NULL;
}

int
filter_part_xml_create (FilterPart *ff, xmlNodePtr node, RuleContext *rc)
{
    xmlNodePtr n;
    char *type, *str;
    FilterElement *el;
    
    str = (char *)xmlGetProp (node, (const unsigned char *)"name");
    ff->name = g_strdup (str);
    if (str)
        xmlFree (str);
    
    n = node->children;
    while (n) {
        if (!strcmp ((char *)n->name, "input")) {
            type = (char *)xmlGetProp (n, (const unsigned char *)"type");
            d(printf ("creating new element type input '%s'\n", type));
            if (type != NULL
                && (el = rule_context_new_element(rc, type)) != NULL) {
                filter_element_xml_create (el, n);
                xmlFree (type);
                d(printf ("adding element part %p %s\n", ff, el, el->name));
                ff->elements = g_list_append (ff->elements, el);
            } else {
                g_warning ("Invalid xml format, missing/unknown input type");
            }
        } else if (!strcmp ((char *)n->name, "title")) {
            if (!ff->title) {
                str = (char *)xmlNodeGetContent (n);
                ff->title = g_strdup (str);
                if (str)
                    xmlFree (str);
            }
        } else if (!strcmp ((char *)n->name, "code")) {
            if (!ff->code) {
                str = (char *)xmlNodeGetContent (n);
                ff->code = g_strdup (str);
                if (str)
                    xmlFree (str);
            }
        } else if (n->type == XML_ELEMENT_NODE) {
            g_warning ("Unknown part element in xml: %s\n", n->name);
        }
        n = n->next;
    }
    
    return 0;
}

xmlNodePtr
filter_part_xml_encode (FilterPart *fp)
{
    GList *l;
    FilterElement *fe;
    xmlNodePtr part, value;
    
    g_return_val_if_fail (fp != NULL, NULL);
    
    part = xmlNewNode (NULL, (const unsigned char *)"part");
    xmlSetProp (part, (const unsigned char *)"name", (unsigned char *)fp->name);
    l = fp->elements;
    while (l) {
        fe = l->data;
        value = filter_element_xml_encode (fe);
        xmlAddChild (part, value);
        l = g_list_next (l);
    }
    
    return part;
}


int
filter_part_xml_decode (FilterPart *fp, xmlNodePtr node)
{
    FilterElement *fe;
    xmlNodePtr n;
    char *name;
    
    g_return_val_if_fail (fp != NULL, -1);
    g_return_val_if_fail (node != NULL, -1);
    
    n = node->children;
    while (n) {
        if (!strcmp ((char *)n->name, "value")) {
            name = (char *)xmlGetProp (n, (const unsigned char *)"name");
            d(printf ("finding element part %p %s = %p\n", name, name, fe));
            fe = filter_part_find_element (fp, name);
            d(printf ("finding element part %p %s = %p\n", name, name, fe));
            xmlFree (name);
            if (fe)
                filter_element_xml_decode (fe, n);
        }
        n = n->next;
    }
    
    return 0;
}

FilterPart *
filter_part_clone (FilterPart *fp)
{
    FilterPart *new;
    GList *l;
    FilterElement *fe, *ne;
    
    new = (FilterPart *) g_object_new (G_OBJECT_TYPE (fp), NULL, NULL);
    new->name = g_strdup (fp->name);
    new->title = g_strdup (fp->title);
    new->code = g_strdup (fp->code);
    l = fp->elements;
    while (l) {
        fe = l->data;
        ne = filter_element_clone (fe);
        new->elements = g_list_append (new->elements, ne);
        l = g_list_next (l);
    }
    
    return new;
}

/* only copies values of matching parts in the right order */
void
filter_part_copy_values (FilterPart *dst, FilterPart *src)
{
    GList *dstl, *srcl, *dstt;
    FilterElement *de, *se;
    
    /* NOTE: we go backwards, it just works better that way */
    
    /* for each source type, search the dest type for
       a matching type in the same order */
    srcl = g_list_last (src->elements);
    dstl = g_list_last (dst->elements);
    while (srcl && dstl) {
        se = srcl->data;
        dstt = dstl;
        while (dstt) {
            de = dstt->data;
            if (FILTER_PART_GET_CLASS (de) == FILTER_PART_GET_CLASS (se)) {
                filter_element_copy_value (de, se);
                dstl = dstt->prev;
                break;
            }
            dstt = dstt->prev;
        }
        
        srcl = srcl->prev;
    }
}

FilterElement *
filter_part_find_element (FilterPart *ff, const char *name)
{
    GList *l = ff->elements;
    FilterElement *fe;
    
    if (name == NULL)
        return NULL;
    
    while (l) {
        fe = l->data;
        if (fe->name && !strcmp (fe->name, name))
            return fe;
        l = g_list_next (l);
    }
    
    return NULL;
}


GtkWidget *
filter_part_get_widget (FilterPart *ff)
{
    GtkWidget *hbox;
    GList *l = ff->elements;
    FilterElement *fe;
    GtkWidget *w;
    
    hbox = gtk_hbox_new (FALSE, 3);
    
    while (l) {
        fe = l->data;
        w = filter_element_get_widget (fe);
        if (w)
            gtk_box_pack_start (GTK_BOX (hbox), w, FALSE, FALSE, 3);
        
        l = g_list_next (l);
    }
    
    gtk_widget_show_all (hbox);
    
    return hbox;
}

/**
 * filter_part_build_code:
 * @ff: 
 * @out: 
 * 
 * Outputs the code of a part.
 **/
void
filter_part_build_code (FilterPart *ff, GString *out)
{
    GList *l = ff->elements;
    FilterElement *fe;
    
    if (ff->code)
        filter_part_expand_code (ff, ff->code, out);
    
    while (l) {
        fe = l->data;
        filter_element_build_code (fe, out, ff);
        l = l->next;
    }
}

/**
 * filter_part_build_code_list:
 * @l: 
 * @out: 
 * 
 * Construct a list of the filter parts code into
 * a single string.
 **/
void
filter_part_build_code_list (GList *l, GString *out)
{
    FilterPart *fp;
    
    while (l) {
        fp = l->data;
        filter_part_build_code (fp, out);
        g_string_append (out, "\n  ");
        l = l->next;
    }
}

/**
 * filter_part_find_list:
 * @l: 
 * @name: 
 * 
 * Find a filter part stored in a list.
 * 
 * Return value: 
 **/
FilterPart *
filter_part_find_list (GList *l, const char *name)
{
    FilterPart *part;
    
    d(printf ("Find part named %s\n", name));
    
    while (l) {
        part = l->data;
        if (!strcmp (part->name, name)) {
            d(printf ("Found!\n"));
            return part;
        }
        l = l->next;
    }
    
    return NULL;
}

/**
 * filter_part_next_list:
 * @l: 
 * @last: The last item retrieved, or NULL to start
 * from the beginning of the list.
 * 
 * Iterate through a filter part list.
 * 
 * Return value: The next value in the list, or NULL if the
 * list is expired.
 **/
FilterPart *
filter_part_next_list (GList *l, FilterPart *last)
{
    GList *node = l;
    
    if (last != NULL) {
        node = g_list_find (node, last);
        if (node == NULL)
            node = l;
        else
            node = node->next;
    }
    
    if (node)
        return node->data;
    
    return NULL;
}

/**
 * filter_part_expand_code:
 * @ff: 
 * @str: 
 * @out: 
 * 
 * Expands the variables in string @str based on the values of the part.
 **/
void
filter_part_expand_code (FilterPart *ff, const char *source, GString *out)
{
    const char *newstart, *start, *end;
    char *name = alloca (32);
    int len, namelen = 32;
    FilterElement *fe;
    
    start = source;
    while (start && (newstart = strstr (start, "${"))
        && (end = strstr (newstart+2, "}")) ) {
        len = end - newstart - 2;
        if (len + 1 > namelen) {
            namelen = (len + 1) * 2;
            name = g_alloca (namelen);
        }
        memcpy (name, newstart+2, len);
        name[len] = 0;
        fe = filter_part_find_element (ff, name);
        d(printf("expand code: looking up variab le '%s' = %p\n", ff, name, fe));
        if (fe) {
            g_string_append_printf (out, "%.*s", (int)(newstart-start), start);
            filter_element_format_sexp (fe, out);
#if 0
        } else if ((val = g_hash_table_lookup (ff->globals, name))) {
            g_string_append_printf (out, "%.*s", newstart-start, start);
            e_sexp_encode_string (out, val);
#endif
        } else {
            g_string_append_printf (out, "%.*s", (int)(end-start+1), start);
        }
        start = end + 1;
    }
    g_string_append (out, start);
}

#if 0
int main(int argc, char **argv)
{
    GtkWidget *dialog, *w;
    xmlDocPtr system;
    xmlNodePtr node;
    FilterPart *ff;
    GString *code;
    
    gnome_init ("test", "0.0", argc, argv);
    
    system = xmlParseFile ("form.xml");
    if (system == NULL) {
        printf("i/o error\n");
        return 1;
    }
    
    ff = filter_part_new ();
    filter_part_xml_create (ff, system->root);
    
    w = filter_part_get_widget (ff);
    
    dialog = gtk_dialog_new ();
    gtk_dialog_add_buttons ((GtkDialog *) dialog, GTK_BUTTONS_OK, NULL);
    gtk_dialog_set_has_separator ((GtkDialog *) dialog, FALSE);
    gtk_window_set_title ((GtkWindow *) dialog, _("Test"));
    gtk_window_set_policy ((GtkWindow *) dialog, FALSE, TRUE, FALSE);
    gtk_box_pack_start ((GtkBox *) dialog->vbox, w, TRUE, TRUE, 0);
    
    gtk_dialog_run ((GtkDialog *) dialog);
    gtk_widget_destroy (dialog);
    
    code = g_string_new ("");
    filter_part_build_code (ff, code);
    printf("code is:\n%s\n", code->str);
    
    return 0;
}
#endif