source: trunk/third/gtkhtml3/src/htmlform.c @ 19539

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*  This file is part of the GtkHTML widget.

    Copyright (C) 2000 Jonas Borgström <jonas_b@bitsmart.com>

    This library 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 library 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 library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,    Boston, MA 02111-1307, USA.

*/

#include <config.h>
#include <string.h>
#include "htmlform.h"
#include "htmlengine.h"


HTMLForm *
html_form_new (HTMLEngine *engine, gchar *_action, gchar *_method) 
{
        HTMLForm *new;
        
        new = g_new (HTMLForm, 1);
        new->action = g_strdup(_action);
        new->method = g_strdup(_method);

        new->elements = NULL;
        new->hidden = NULL;
        html_form_set_engine (new, engine);

        new->radio_group = g_hash_table_new (g_str_hash, g_str_equal);

        return new;
}

void
html_form_add_element (HTMLForm *form, HTMLEmbedded *element)
{
        form->elements = g_list_append (form->elements, element);

        html_embedded_set_form (element, form);
}

void
html_form_add_hidden (HTMLForm *form, HTMLHidden *hidden)
{
        html_form_add_element (form, HTML_EMBEDDED (hidden));

        form->hidden = g_list_append (form->hidden, hidden);
}

void
html_form_add_radio (HTMLForm *form, char *name, GtkRadioButton *button)
{
        GtkWidget *master;
        GSList *group;
        char *key = name;

        /*
         * FIXME a null name makes them all share the same "" group.  I doubt this
         *  is the correct behaviour but I'm not sure what is.  The spec doesn't seem clear.
         */
        if (key == NULL) key = "";

        master = g_hash_table_lookup (form->radio_group, key);
        if (master == NULL) {
                /* if there is no entry we dup the key because the table will own it */
                key = g_strdup (key);
                gtk_widget_ref (GTK_WIDGET (button));
                g_hash_table_insert (form->radio_group, key, button);
        } else {
                group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (master));
                gtk_radio_button_set_group (button, group);
        }
}

static void
destroy_hidden (gpointer o, gpointer data)
{
        html_object_destroy (HTML_OBJECT (o));
}

static void
destroy_radio (char *key, gpointer *master)
{
        g_free (key);
        gtk_widget_unref (GTK_WIDGET (master));
}

static void
reset_element (gpointer o, gpointer data)
{
        html_embedded_reset (HTML_EMBEDDED (o));
}

void
html_form_destroy (HTMLForm *form)
{
        g_list_foreach (form->hidden, destroy_hidden, NULL);
        g_list_free (form->elements);
        g_list_free (form->hidden);

        g_hash_table_foreach (form->radio_group, (GHFunc)destroy_radio, NULL);
        g_hash_table_destroy (form->radio_group);

        g_free (form->action);
        g_free (form->method);
        g_free (form);
}

void
html_form_submit (HTMLForm *form)
{
        GString *encoding = g_string_new ("");
        gint first = TRUE;
        GList *i = form->elements;
        gchar *ptr;

        while (i) {
                ptr = html_embedded_encode (HTML_EMBEDDED (i->data));

                if (strlen (ptr)) {
                        if(!first)
                                encoding = g_string_append_c (encoding, '&');
                        else
                                first = FALSE;
                        
                        encoding = g_string_append (encoding, ptr);
                        g_free (ptr);
                }
                i = g_list_next (i);            
        }

        html_engine_form_submitted (form->engine, form->method, form->action, encoding->str);

        g_string_free (encoding, TRUE);
}

void
html_form_set_engine (HTMLForm *form, HTMLEngine *engine)
{
        g_return_if_fail (HTML_IS_ENGINE (engine));
        form->engine = engine;
}

void
html_form_reset (HTMLForm *form)
{
        g_list_foreach (form->elements, reset_element, NULL);
}