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/* ply-text-pulser.c - simple text based pulsing animation
*
* Copyright (C) 2008 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, 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 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.
*
* Written by: Ray Strode <rstrode@redhat.com>
*/
#include "config.h"
#include <assert.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <math.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <values.h>
#include <unistd.h>
#include <wchar.h>
#include "ply-text-pulser.h"
#include "ply-event-loop.h"
#include "ply-array.h"
#include "ply-logger.h"
#include "ply-utils.h"
#include "ply-window.h"
#include <linux/kd.h>
#ifndef FRAMES_PER_SECOND
#define FRAMES_PER_SECOND 10
#endif
#define NUMBER_OF_INDICATOR_COLUMNS 6
struct _ply_text_pulser
{
ply_event_loop_t *loop;
ply_window_t *window;
int column, row;
int number_of_rows;
int number_of_columns;
int spinner_position;
double start_time, now;
};
ply_text_pulser_t *
ply_text_pulser_new (void)
{
ply_text_pulser_t *pulser;
pulser = calloc (1, sizeof (ply_text_pulser_t));
pulser->number_of_rows = 0;
pulser->number_of_columns = 0;
pulser->row = 0;
pulser->column = 0;
pulser->spinner_position = 0;
pulser->number_of_columns = 40;
pulser->number_of_rows = 3;
return pulser;
}
void
ply_text_pulser_free (ply_text_pulser_t *pulser)
{
if (pulser == NULL)
return;
free (pulser);
}
static void
animate_at_time (ply_text_pulser_t *pulser,
double time)
{
ply_window_set_mode (pulser->window, PLY_WINDOW_MODE_TEXT);
ply_window_set_text_cursor_position (pulser->window,
pulser->column + pulser->spinner_position,
pulser->row + 1);
ply_window_set_background_color (pulser->window, PLY_WINDOW_COLOR_DEFAULT);
write (STDOUT_FILENO, " ", strlen (" "));
pulser->spinner_position = ((pulser->number_of_columns - 2) - NUMBER_OF_INDICATOR_COLUMNS - 1) * (.5 * sin (time) + .5) + 2;
ply_window_set_text_cursor_position (pulser->window,
pulser->column + pulser->spinner_position,
pulser->row + 1);
ply_window_set_background_color (pulser->window, PLY_WINDOW_COLOR_WHITE);
write (STDOUT_FILENO, " ", strlen (" "));
ply_window_set_background_color (pulser->window, PLY_WINDOW_COLOR_DEFAULT);
}
static void
on_timeout (ply_text_pulser_t *pulser)
{
double sleep_time;
pulser->now = ply_get_timestamp ();
#ifdef REAL_TIME_ANIMATION
animate_at_time (pulser,
pulser->now - pulser->start_time);
#else
static double time = 0.0;
time += 1.0 / FRAMES_PER_SECOND;
animate_at_time (pulser, time);
#endif
sleep_time = 1.0 / FRAMES_PER_SECOND;
sleep_time = MAX (sleep_time - (ply_get_timestamp () - pulser->now),
0.005);
ply_event_loop_watch_for_timeout (pulser->loop,
sleep_time,
(ply_event_loop_timeout_handler_t)
on_timeout, pulser);
}
bool
ply_text_pulser_start (ply_text_pulser_t *pulser,
ply_event_loop_t *loop,
ply_window_t *window,
int column,
int row)
{
assert (pulser != NULL);
assert (pulser->loop == NULL);
pulser->loop = loop;
pulser->window = window;
pulser->row = row;
pulser->column = column;
pulser->start_time = ply_get_timestamp ();
ply_event_loop_watch_for_timeout (pulser->loop,
1.0 / FRAMES_PER_SECOND,
(ply_event_loop_timeout_handler_t)
on_timeout, pulser);
return true;
}
void
ply_text_pulser_stop (ply_text_pulser_t *pulser)
{
pulser->window = NULL;
if (pulser->loop != NULL)
{
ply_event_loop_stop_watching_for_timeout (pulser->loop,
(ply_event_loop_timeout_handler_t)
on_timeout, pulser);
pulser->loop = NULL;
}
}
int
ply_text_pulser_get_number_of_columns (ply_text_pulser_t *pulser)
{
return pulser->number_of_columns;
}
int
ply_text_pulser_get_number_of_rows (ply_text_pulser_t *pulser)
{
return pulser->number_of_rows;
}
/* vim: set ts=4 sw=4 expandtab autoindent cindent cino={.5s,(0: */
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