rainmeter-studio/Library/MeasureDiskSpace.cpp
2011-05-27 18:39:57 +00:00

205 lines
5.1 KiB
C++

/*
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.
*/
#include "StdAfx.h"
#include "MeasureDiskSpace.h"
#include "Rainmeter.h"
/*
** CMeasureDiskSpace
**
** The constructor
**
*/
CMeasureDiskSpace::CMeasureDiskSpace(CMeterWindow* meterWindow, const WCHAR* name) : CMeasure(meterWindow, name),
m_Total(false),
m_Label(false),
m_IgnoreRemovable(true),
m_OldTotalBytes()
{
}
/*
** ~CMeasureDiskSpace
**
** The destructor
**
*/
CMeasureDiskSpace::~CMeasureDiskSpace()
{
}
/*
** Update
**
** Updates the current disk free space value.
**
*/
bool CMeasureDiskSpace::Update()
{
if (!CMeasure::PreUpdate()) return false;
if (!m_Drive.empty())
{
BOOL sizeResult = FALSE;
ULARGE_INTEGER i64TotalBytes, i64FreeBytes;
UINT type = GetDriveType(m_Drive.c_str());
if (type != DRIVE_NO_ROOT_DIR)
{
if (type != DRIVE_CDROM && (!m_IgnoreRemovable || type != DRIVE_REMOVABLE)) // Ignore CD-ROMS and removable drives
{
ULARGE_INTEGER i64FreeBytesToCaller;
UINT oldMode = SetErrorMode(0);
SetErrorMode(oldMode | SEM_FAILCRITICALERRORS); // Prevent the system from displaying message box
SetLastError(ERROR_SUCCESS);
sizeResult = GetDiskFreeSpaceEx(m_Drive.c_str(), &i64FreeBytesToCaller, &i64TotalBytes, &i64FreeBytes);
SetErrorMode(oldMode); // Reset
}
}
if (sizeResult)
{
m_Value = (double)(__int64)((m_Total) ? i64TotalBytes : i64FreeBytes).QuadPart;
if (i64TotalBytes.QuadPart != m_OldTotalBytes)
{
// Total size was changed, so set new max value.
m_MaxValue = (double)(__int64)i64TotalBytes.QuadPart;
m_OldTotalBytes = i64TotalBytes.QuadPart;
}
}
else
{
m_Value = 0.0;
m_MaxValue = 0.0;
m_OldTotalBytes = 0;
}
if (m_Label)
{
BOOL labelResult = FALSE;
WCHAR volumeName[MAX_PATH] = {0};
if (type != DRIVE_NO_ROOT_DIR)
{
if (!m_IgnoreRemovable || type != DRIVE_REMOVABLE) // Ignore removable drives
{
UINT oldMode = SetErrorMode(0);
SetErrorMode(oldMode | SEM_FAILCRITICALERRORS); // Prevent the system from displaying message box
labelResult = GetVolumeInformation(m_Drive.c_str(), volumeName, MAX_PATH, NULL, NULL, NULL, NULL, 0);
SetErrorMode(oldMode); // Reset
}
}
m_LabelName = (labelResult) ? volumeName : L"";
}
else if (!m_LabelName.empty())
{
m_LabelName = L"";
}
}
return PostUpdate();
}
/*
** GetStringValue
**
** Returns the time as string.
**
*/
const WCHAR* CMeasureDiskSpace::GetStringValue(AUTOSCALE 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)
{
double oldMaxValue = m_MaxValue;
CMeasure::ReadConfig(parser, section);
m_Drive = parser.ReadString(section, L"Drive", L"C:\\");
if (m_Drive.empty())
{
Log(LOG_WARNING, L"Drive path is not given.");
m_Value = 0.0;
m_MaxValue = 0.0;
m_OldTotalBytes = 0;
m_LabelName = L"";
}
else if (m_Drive[m_Drive.length() - 1] != L'\\') // E.g. "C:"
{
m_Drive += L"\\"; // A trailing backslash is required.
}
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
if (!m_Initialized)
{
BOOL result = FALSE;
ULARGE_INTEGER i64TotalBytes;
if (!m_Drive.empty())
{
UINT type = GetDriveType(m_Drive.c_str());
if (type != DRIVE_NO_ROOT_DIR &&
type != DRIVE_CDROM && (!m_IgnoreRemovable || type != DRIVE_REMOVABLE)) // Ignore CD-ROMS and removable drives
{
ULARGE_INTEGER i64FreeBytesToCaller, i64FreeBytes;
UINT oldMode = SetErrorMode(0);
SetErrorMode(oldMode | SEM_FAILCRITICALERRORS); // Prevent the system from displaying message box
result = GetDiskFreeSpaceEx(m_Drive.c_str(), &i64FreeBytesToCaller, &i64TotalBytes, &i64FreeBytes);
SetErrorMode(oldMode); // Reset
}
}
if (result)
{
m_MaxValue = (double)(__int64)i64TotalBytes.QuadPart;
m_OldTotalBytes = i64TotalBytes.QuadPart;
}
else
{
m_MaxValue = 0.0;
m_OldTotalBytes = 0;
}
}
else
{
m_MaxValue = oldMaxValue;
}
}