/* $Id: history.c,v 1.1 2009/12/27 17:30:56 khorben Exp $ */
/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Surfer */
/* Surfer is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License version 2 as published by the Free
 * Software Foundation.
 *
 * Surfer 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
 * Surfer; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
 * Suite 330, Boston, MA  02111-1307  USA */



#include <glib.h>


/* History */
/* private */
/* types */
typedef struct _History
{
	gchar * base;
	gchar * url;
	gchar * post;
} History;


/* prototypes */
static History * _history_new(gchar const * url, gchar const * post);
static void _history_delete(History * h);

/* accessors */
static gboolean _history_can_go_back(GList * history);
static gboolean _history_can_go_forward(GList * history);

static gchar const * _history_get_location(GList * history);


/* functions */
/* history_new */
static History * _history_new(gchar const * url, gchar const * post)
{
	History * h;

	if((h = object_new(sizeof(*h))) == NULL)
		return NULL;
	h->base = NULL;
	h->url = g_strdup(url);
	h->post = (post != NULL) ? g_strdup(post) : NULL;
	if(h->url == NULL || (post != NULL && h->post == NULL))
	{
		_history_delete(h);
		return NULL;
	}
	return h;
}


/* history_delete */
static void _history_delete(History * h)
{
	g_free(h->base);
	g_free(h->url);
	g_free(h->post);
	free(h);
}


/* accessors */
/* history_can_go_back */
static gboolean _history_can_go_back(GList * history)
{
	return history != NULL && history->prev != NULL
		? TRUE : FALSE;
}


/* history_can_go_forward */
static gboolean _history_can_go_forward(GList * history)
{
	return history != NULL && history->next != NULL
		? TRUE : FALSE;
}


/* history_get_location */
static gchar const * _history_get_location(GList * history)
{
	History * ghh;

	if(history == NULL)
		return NULL;
	if((ghh = history->data) == NULL)
		return NULL;
	return ghh->url;
}