rainmeter-studio/Library/MeasurePlugin.cpp
2011-12-04 22:18:40 +00:00

235 lines
5.2 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 "MeasurePlugin.h"
#include "Rainmeter.h"
#include "System.h"
#include "Error.h"
extern CRainmeter* Rainmeter;
/*
** CMeasureMemory
**
** The constructor
**
*/
CMeasurePlugin::CMeasurePlugin(CMeterWindow* meterWindow, const WCHAR* name) : CMeasure(meterWindow, name),
m_Plugin(),
m_ID(),
InitializeFunc(),
UpdateFunc(),
UpdateFunc2(),
FinalizeFunc(),
GetStringFunc(),
ExecuteBangFunc()
{
m_MaxValue = 0.0;
}
/*
** ~CMeasureMemory
**
** The destructor
**
*/
CMeasurePlugin::~CMeasurePlugin()
{
if (m_Plugin)
{
if (FinalizeFunc) FinalizeFunc(m_Plugin, m_ID);
FreeLibrary(m_Plugin);
}
}
/*
** Update
**
** Gets the current value from the plugin
**
*/
bool CMeasurePlugin::Update()
{
if (!CMeasure::PreUpdate()) return false;
if (UpdateFunc)
{
// Update the plugin
m_Value = UpdateFunc(m_ID);
}
else if (UpdateFunc2)
{
// Update the plugin
m_Value = UpdateFunc2(m_ID);
}
// Reset to default
CSystem::ResetWorkingDirectory();
return PostUpdate();
}
/*
** ReadConfig
**
** Reads the configs and loads & initializes the plugin
**
*/
void CMeasurePlugin::ReadConfig(CConfigParser& parser, const WCHAR* section)
{
static UINT id = 1;
CMeasure::ReadConfig(parser, section);
if (m_Initialized)
{
// DynamicVariables doesn't work with plugins, so stop here.
return;
}
m_PluginName = parser.ReadString(section, L"Plugin", L"");
size_t pos = m_PluginName.rfind(L'.');
if (pos == std::wstring::npos)
{
m_PluginName += L".dll";
}
pos = m_PluginName.rfind(L'\\');
if (pos != std::wstring::npos)
{
m_PluginName.insert(0, L"..\\");
}
m_PluginName.insert(0, Rainmeter->GetPluginPath());
DWORD err = 0;
m_Plugin = CSystem::RmLoadLibrary(m_PluginName.c_str(), &err);
if (m_Plugin == NULL)
{
if (Rainmeter->GetDebug())
{
LogWithArgs(LOG_ERROR, L"Plugin: Unable to load \"%s\" (%u)", m_PluginName.c_str(), err);
}
// Try to load from Rainmeter's folder
pos = m_PluginName.rfind(L'\\');
if (pos != std::wstring::npos)
{
std::wstring pluginName = Rainmeter->GetPath();
pluginName.append(m_PluginName, pos + 1, m_PluginName.length() - (pos + 1));
err = 0;
m_Plugin = CSystem::RmLoadLibrary(pluginName.c_str(), &err);
if (m_Plugin == NULL)
{
if (Rainmeter->GetDebug())
{
LogWithArgs(LOG_ERROR, L"Plugin: Unable to load \"%s\" (%u)", pluginName.c_str(), err);
}
}
}
if (m_Plugin == NULL)
{
std::wstring error = L"Plugin: \"" + m_PluginName;
error += L"\" not found";
throw CError(error);
}
}
InitializeFunc = (INITIALIZE)GetProcAddress(m_Plugin, "Initialize");
FinalizeFunc = (FINALIZE)GetProcAddress(m_Plugin, "Finalize");
UpdateFunc = (UPDATE)GetProcAddress(m_Plugin, "Update");
UpdateFunc2 = (UPDATE2)GetProcAddress(m_Plugin, "Update2");
GetStringFunc = (GETSTRING)GetProcAddress(m_Plugin, "GetString");
ExecuteBangFunc = (EXECUTEBANG)GetProcAddress(m_Plugin, "ExecuteBang");
if (UpdateFunc == NULL && UpdateFunc2 == NULL && GetStringFunc == NULL)
{
FreeLibrary(m_Plugin);
std::wstring error = L"Plugin: \"" + m_PluginName;
error += L"\" doesn't export Update() or GetString()";
throw CError(error);
}
// Initialize the plugin
m_ID = id++;
if (InitializeFunc)
{
// Remove current directory from DLL search path
SetDllDirectory(L"");
double maxValue;
maxValue = InitializeFunc(m_Plugin, parser.GetFilename().c_str(), section, m_ID);
// Reset to default
SetDllDirectory(L"");
CSystem::ResetWorkingDirectory();
const std::wstring& szMaxValue = parser.ReadString(section, L"MaxValue", L"");
if (szMaxValue.empty())
{
m_MaxValue = maxValue;
}
}
if (m_MaxValue == 0)
{
m_MaxValue = 1;
m_LogMaxValue = true;
}
}
/*
** GetStringValue
**
** Gets the string value from the plugin.
**
*/
const WCHAR* CMeasurePlugin::GetStringValue(AUTOSCALE autoScale, double scale, int decimals, bool percentual)
{
if (GetStringFunc)
{
const WCHAR* ret = GetStringFunc(m_ID, 0);
if (ret) return CheckSubstitute(ret);
}
return CMeasure::GetStringValue(autoScale, scale, decimals, percentual);
}
/*
** ExecuteBang
**
** Sends a bang to the plugin
**
*/
void CMeasurePlugin::ExecuteBang(const WCHAR* args)
{
if (ExecuteBangFunc)
{
ExecuteBangFunc(args, m_ID);
}
else
{
CMeasure::ExecuteBang(args);
}
}