rainmeter-studio/Library/MeasureDiskSpace.cpp

/*
  Copyright (C) 2001 Kimmo Pekkola

  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
  of the License, 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.
*/

#pragma warning(disable: 4996)

#include "MeasureDiskSpace.h"
#include "Rainmeter.h"

/*
** CMeasureDiskSpace
**
** The constructor
**
*/
CMeasureDiskSpace::CMeasureDiskSpace(CMeterWindow* meterWindow) : CMeasure(meterWindow)
{
	m_Total = false;
	m_Label = false;
	m_IgnoreRemovable = true;
}

/*
** ~CMeasureDiskSpace
**
** The destructor
**
*/
CMeasureDiskSpace::~CMeasureDiskSpace()
{
}

/*
** Update
**
** Updates the current disk free space value. 
**
*/
bool CMeasureDiskSpace::Update()
{
	if (!CMeasure::PreUpdate()) return false;

	ULARGE_INTEGER i64FreeBytesToCaller, i64TotalBytes, i64FreeBytes;

	UINT type = GetDriveType(m_Drive.c_str());
	if (type != DRIVE_CDROM && (!m_IgnoreRemovable || type != DRIVE_REMOVABLE))	// Ignore CD-ROMS and removable drives
	{
		if(GetDiskFreeSpaceEx(m_Drive.c_str(), &i64FreeBytesToCaller, &i64TotalBytes, &i64FreeBytes))
		{
			LARGE_INTEGER tmpInt;
			if (m_Total)
			{
				tmpInt.QuadPart = i64TotalBytes.QuadPart;
			}
			else
			{
				tmpInt.QuadPart = i64FreeBytes.QuadPart;
			}
			m_Value = (double)tmpInt.QuadPart;
		}
	}
	else
	{
		m_Value = 0;
	}

	if (m_Label) 
	{
		WCHAR volumeName[MAX_PATH];
		GetVolumeInformation(m_Drive.c_str(), volumeName, MAX_PATH, NULL, NULL, NULL, NULL, 0);
		m_LabelName = volumeName;
	}

	return PostUpdate();
}

/*
** GetStringValue
**
** Returns the time as string.
**
*/
const WCHAR* CMeasureDiskSpace::GetStringValue(bool autoScale, double scale, int decimals, bool percentual)
{
	if (m_Label) 
	{
		return CheckSubstitute(m_LabelName.c_str());
	}

	return CMeasure::GetStringValue(autoScale, scale, decimals, percentual);
}

/*
** ReadConfig
**
** Reads the measure specific configs.
**
*/
void CMeasureDiskSpace::ReadConfig(CConfigParser& parser, const WCHAR* section)
{
	CMeasure::ReadConfig(parser, section);

	m_Drive = parser.ReadString(section, L"Drive", L"C:\\");
	m_Total = (1 == parser.ReadInt(section, L"Total", 0));
	m_Label = (1 == parser.ReadInt(section, L"Label", 0));
	m_IgnoreRemovable = (1 == parser.ReadInt(section, L"IgnoreRemovable", 1));

	// Set the m_MaxValue
	ULARGE_INTEGER i64FreeBytesToCaller, i64TotalBytes, i64FreeBytes;

	UINT type = GetDriveType(m_Drive.c_str());
	if (type != DRIVE_CDROM && (!m_IgnoreRemovable || type != DRIVE_REMOVABLE))	// Ignore CD-ROMS and removable drives
	{
		if(GetDiskFreeSpaceEx(m_Drive.c_str(), &i64FreeBytesToCaller, &i64TotalBytes, &i64FreeBytes))
		{
			LARGE_INTEGER tmpInt;
			tmpInt.QuadPart = i64TotalBytes.QuadPart;
			m_MaxValue = (double)tmpInt.QuadPart;
		}
	}
}