ObjFW  Check-in [30e8df31a0]

 * file.
 */

#import "OFObject.h"

@class OFDate;
@class OFTimer;

#define BPS_WINDOW_SIZE 10

@interface ProgressBar: OFObject
{
	intmax_t _received, _lastReceived, _length, _resumedFrom;
	OFDate *_startDate, *_lastReceivedDate;
	OFTimer *_drawTimer, *_BPSTimer;
	bool _stopped;
	float _BPS;
	double _ETA;
	float _BPSWindow[BPS_WINDOW_SIZE];
	size_t _BPSWindowIndex, _BPSWindowLength;
}

- (instancetype)initWithLength: (intmax_t)length
		   resumedFrom: (intmax_t)resumedFrom;
- (void)setReceived: (intmax_t)received;
- (void)draw;
- (void)calculateBPSAndETA;
- (void)stop;
@end

		[self _drawProgress];
	else
		[self _drawReceived];
}

- (void)calculateBPSAndETA
{
	_BPSWindow[_BPSWindowIndex++ % BPS_WINDOW_SIZE] =
	_BPS = (float)(_received - _lastReceived) /
	    (float)(_received - _lastReceived) /
	    -(float)_lastReceivedDate.timeIntervalSinceNow;

	if (_BPSWindowLength < BPS_WINDOW_SIZE)
		_BPSWindowLength++;

	_BPS = 0;
	for (size_t i = 0; i < _BPSWindowLength; i++)
		_BPS += _BPSWindow[i];
	_BPS /= _BPSWindowLength;

	_ETA = (double)(_length - _received) / _BPS;

	_lastReceived = _received;
	[_lastReceivedDate release];
	_lastReceivedDate = [[OFDate alloc] init];
}