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/**
* Navit, a modular navigation system.
* Copyright (C) 2005-2008 Navit Team
*
* This program 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.
*
* 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <glib.h>
#include <time.h>
#include "messages.h"
#include "callback.h"
#include "event.h"
#include "attr.h"
struct messagelist {
struct message *messages; /**< All the messages that can currently be shown */
int last_mid; /**< Last Message ID */
int maxage; /**< Maximum age of messages */
int maxnum; /**< Maximum number of messages */
struct callback *msg_cleanup_cb; /**< Callback to clean up the messages */
struct event_timeout *msg_cleanup_to; /**< Idle event to clean up the messages */
};
int
message_new(struct messagelist *this_, const char *message) {
struct message *msg;
msg = g_new0(struct message, 1);
msg->text = g_strdup(message);
msg->id = ++(this_->last_mid);
msg->time = time(NULL);
msg->next = this_->messages;
this_->messages = msg;
return msg->id;
}
int
message_delete(struct messagelist *this_, int mid) {
struct message *msg,*last;;
msg = this_->messages;
last = NULL;
while (msg) {
if (msg->id == mid) {
break;
}
last = msg;
msg = msg->next;
}
if (msg) {
if (last) {
last->next = msg->next;
} else {
this_->messages = msg->next;
}
g_free(msg->text);
g_free(msg);
return 1;
} else {
return 0;
}
}
static void
message_cleanup(struct messagelist *this_) {
struct message *msg,*next,*prev=NULL;
int i;
time_t now;
msg = this_->messages;
now = time(NULL);
i = 0;
while (msg && (i < this_->maxnum)) {
if ((this_->maxage > 0) && (now - msg->time) > this_->maxage) {
break;
}
i++;
prev = msg;
msg = msg->next;
}
if (prev) {
prev->next = NULL;
} else {
this_->messages = NULL;
}
while (msg) {
next = msg->next;
g_free(msg->text);
g_free(msg);
msg = next;
}
}
struct messagelist
*messagelist_new(struct attr **attrs) {
struct messagelist *this = g_new0(struct messagelist, 1);
struct attr num_attr,age_attr;
if (attr_generic_get_attr(attrs, NULL, attr_message_maxage, &age_attr, NULL)) {
this->maxage = age_attr.u.num;
} else {
this->maxage = 10;
}
if (attr_generic_get_attr(attrs, NULL, attr_message_maxnum, &num_attr, NULL)) {
this->maxnum = num_attr.u.num;
} else {
this->maxnum = 3;
}
return this;
}
void
messagelist_init(struct messagelist *this_) {
if (!event_system())
return;
this_->msg_cleanup_cb = callback_new_1(callback_cast(message_cleanup), this_);
this_->msg_cleanup_to = event_add_timeout(1000, 1, this_->msg_cleanup_cb);
}
struct message
*message_get(struct messagelist *this_) {
return this_->messages;
}
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