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/*****************************************************************************
*
* wiacapabilitymanager.cpp
*
* Copyright (c) 2003 Microsoft Corporation. All Rights Reserved.
*
* DESCRIPTION:
*
* Helper class for WIA capabilities
*
*******************************************************************************/
#include "stdafx.h"
#include <strsafe.h>
CWIACapabilityManager::CWIACapabilityManager()
{
}
CWIACapabilityManager::~CWIACapabilityManager()
{
Destroy();
}
HRESULT CWIACapabilityManager::Initialize(_In_ HINSTANCE hInstance)
{
HRESULT hr = E_INVALIDARG;
if(hInstance)
{
m_hInstance = hInstance;
hr = S_OK;
}
else
{
WIAS_ERROR((g_hInst, "Invalid parameters were passed"));
}
return hr;
}
void CWIACapabilityManager::Destroy()
{
WIAS_TRACE((g_hInst,"Array contents"));
for(INT i = 0; i < m_CapabilityArray.Size(); i++)
{
FreeCapability(&m_CapabilityArray[i],TRUE);
}
m_CapabilityArray.Destroy();
}
HRESULT CWIACapabilityManager::AddCapability(const GUID guidCapability,
UINT uiNameResourceID,
UINT uiDescriptionResourceID,
ULONG ulFlags,
_In_ LPWSTR wszIcon)
{
HRESULT hr = S_OK;
WIA_DEV_CAP_DRV *pWIADeviceCapability = NULL;
hr = AllocateCapability(&pWIADeviceCapability);
if((SUCCEEDED(hr)&& (pWIADeviceCapability)))
{
pWIADeviceCapability->ulFlags = ulFlags;
*pWIADeviceCapability->guid = guidCapability;
CBasicStringWide cswCapabilityString;
//
// Load capability name from resource
//
if(cswCapabilityString.LoadString(uiNameResourceID,m_hInstance))
{
hr = StringCbCopyW(pWIADeviceCapability->wszName,
MAX_CAPABILITY_STRING_SIZE_BYTES,
cswCapabilityString.String());
if(FAILED(hr))
{
WIAS_ERROR((g_hInst, "Failed to copy source string (%ws) to destination string, hr = 0x%lx",cswCapabilityString.String(),hr));
}
}
else
{
hr = E_FAIL;
WIAS_ERROR((g_hInst, "Failed to load the device capability name string from DLL resource, hr = 0x%lx",hr));
}
//
// Load capability description from resource
//
if(cswCapabilityString.LoadString(uiDescriptionResourceID,m_hInstance))
{
hr = StringCbCopyW(pWIADeviceCapability->wszDescription,
MAX_CAPABILITY_STRING_SIZE_BYTES,
cswCapabilityString.String());
if(FAILED(hr))
{
WIAS_ERROR((g_hInst, "Failed to copy source string (%ws) to destination string, hr = 0x%lx",cswCapabilityString.String(),hr));
}
}
else
{
hr = E_FAIL;
WIAS_ERROR((g_hInst, "Failed to load the device capability description string from DLL resource, hr = 0x%lx",hr));
}
//
// Copy icon location string
//
cswCapabilityString = wszIcon;
if(cswCapabilityString.Length())
{
hr = StringCbCopyW(pWIADeviceCapability->wszIcon,
MAX_CAPABILITY_STRING_SIZE_BYTES,
cswCapabilityString.String());
if(FAILED(hr))
{
WIAS_ERROR((g_hInst, "Failed to copy source string (%ws) to destination string, hr = 0x%lx",cswCapabilityString.String(),hr));
}
}
else
{
hr = E_FAIL;
WIAS_ERROR((g_hInst, "Failed to load the device capability icon location string from DLL resource, hr = 0x%lx",hr));
}
if(SUCCEEDED(hr))
{
if((pWIADeviceCapability->ulFlags == WIA_NOTIFICATION_EVENT) ||
(pWIADeviceCapability->ulFlags == WIA_ACTION_EVENT))
{
//
// The capability being added is an event, so always add it to the beginning of the array
//
m_CapabilityArray.Insert(*pWIADeviceCapability,0);
}
else
{
//
// The capability being added is a command, so always add it to the end of the array
//
m_CapabilityArray.Append(*pWIADeviceCapability);
}
}
if(pWIADeviceCapability)
{
CoTaskMemFree(pWIADeviceCapability);
pWIADeviceCapability = NULL;
}
}
return hr;
}
HRESULT CWIACapabilityManager::AllocateCapability(_Out_ WIA_DEV_CAP_DRV **ppWIADeviceCapability)
{
HRESULT hr = E_INVALIDARG;
if(ppWIADeviceCapability)
{
*ppWIADeviceCapability = NULL;
WIA_DEV_CAP_DRV *pWIADeviceCapability = NULL;
#pragma prefast(suppress:__WARNING_MEMORY_LEAK, "Freed when calling FreeCapability(*ppWIADeviceCapability).")
pWIADeviceCapability = (WIA_DEV_CAP_DRV*)CoTaskMemAlloc(sizeof(WIA_DEV_CAP_DRV));
if(pWIADeviceCapability)
{
memset(pWIADeviceCapability,0,sizeof(WIA_DEV_CAP_DRV));
//
// attempt to allocate the GUID member of the structure
//
#pragma prefast(suppress:__WARNING_MEMORY_LEAK, "Freed when calling FreeCapability(*ppWIADeviceCapability).")
pWIADeviceCapability->guid = (GUID*)CoTaskMemAlloc(sizeof(GUID));
if(pWIADeviceCapability->guid)
{
*pWIADeviceCapability->guid = GUID_NULL;
hr = S_OK;
}
else
{
hr = E_OUTOFMEMORY;
WIAS_ERROR((g_hInst, "Failed to allocate memory for GUID member of WIA_DEV_CAP_DRV structure, hr = 0x%lx",hr));
}
//
// attempt to allocate the LPOLESTR name member of the structure
//
if(SUCCEEDED(hr))
{
#pragma prefast(suppress:__WARNING_MEMORY_LEAK, "Freed when calling FreeCapability(*ppWIADeviceCapability).")
pWIADeviceCapability->wszName = (LPOLESTR)CoTaskMemAlloc(MAX_CAPABILITY_STRING_SIZE_BYTES);
if(pWIADeviceCapability->wszName)
{
memset(pWIADeviceCapability->wszName,0,MAX_CAPABILITY_STRING_SIZE_BYTES);
hr = S_OK;
}
else
{
hr = E_OUTOFMEMORY;
WIAS_ERROR((g_hInst, "Failed to allocate memory for LPOLESTR (wszName) member of WIA_DEV_CAP_DRV structure, hr = 0x%lx",hr));
}
}
//
// attempt to allocate the LPOLESTR description member of the structure
//
if(SUCCEEDED(hr))
{
#pragma prefast(suppress:__WARNING_MEMORY_LEAK, "Freed when calling FreeCapability(*ppWIADeviceCapability).")
pWIADeviceCapability->wszDescription = (LPOLESTR)CoTaskMemAlloc(MAX_CAPABILITY_STRING_SIZE_BYTES);
if(pWIADeviceCapability->wszDescription)
{
memset(pWIADeviceCapability->wszDescription,0,MAX_CAPABILITY_STRING_SIZE_BYTES);
hr = S_OK;
}
else
{
hr = E_OUTOFMEMORY;
WIAS_ERROR((g_hInst, "Failed to allocate memory for LPOLESTR (wszDescription) member of WIA_DEV_CAP_DRV structure, hr = 0x%lx",hr));
}
}
//
// attempt to allocate the LPOLESTR icon member of the structure
//
if(SUCCEEDED(hr))
{
#pragma prefast(suppress:__WARNING_MEMORY_LEAK, "Freed when calling FreeCapability(*ppWIADeviceCapability).")
pWIADeviceCapability->wszIcon = (LPOLESTR)CoTaskMemAlloc(MAX_CAPABILITY_STRING_SIZE_BYTES);
if(pWIADeviceCapability->wszIcon)
{
memset(pWIADeviceCapability->wszIcon,0,MAX_CAPABILITY_STRING_SIZE_BYTES);
hr = S_OK;
}
else
{
hr = E_OUTOFMEMORY;
WIAS_ERROR((g_hInst, "Failed to allocate memory for LPOLESTR (wszIcon) member of WIA_DEV_CAP_DRV structure, hr = 0x%lx",hr));
}
}
if(SUCCEEDED(hr))
{
*ppWIADeviceCapability = pWIADeviceCapability;
}
else
{
FreeCapability(pWIADeviceCapability);
pWIADeviceCapability = NULL;
}
}
else
{
hr = E_OUTOFMEMORY;
WIAS_ERROR((g_hInst, "Failed to allocate memory for WIA_DEV_CAP_DRV structure, hr = 0x%lx",hr));
}
}
return hr;
}
void CWIACapabilityManager::FreeCapability(_In_ WIA_DEV_CAP_DRV *pWIADeviceCapability,
BOOL bFreeCapabilityContentOnly)
{
if(pWIADeviceCapability)
{
if(pWIADeviceCapability->guid)
{
CoTaskMemFree(pWIADeviceCapability->guid);
pWIADeviceCapability->guid = NULL;
}
if(pWIADeviceCapability->wszName)
{
CoTaskMemFree(pWIADeviceCapability->wszName);
pWIADeviceCapability->wszName = NULL;
}
if(pWIADeviceCapability->wszDescription)
{
CoTaskMemFree(pWIADeviceCapability->wszDescription);
pWIADeviceCapability->wszDescription = NULL;
}
if(pWIADeviceCapability->wszIcon)
{
CoTaskMemFree(pWIADeviceCapability->wszIcon);
pWIADeviceCapability->wszIcon = NULL;
}
if(bFreeCapabilityContentOnly == FALSE)
{
CoTaskMemFree(pWIADeviceCapability);
pWIADeviceCapability = NULL;
}
}
else
{
WIAS_ERROR((g_hInst, "Invalid parameters were passed, caller attempted to free a NULL WIA_DEV_CAP_DRV structure"));
}
}
HRESULT CWIACapabilityManager::DeleteCapability(const GUID guidCapability,
ULONG ulFlags)
{
UNREFERENCED_PARAMETER(guidCapability);
UNREFERENCED_PARAMETER(ulFlags);
return E_NOTIMPL;
}
LONG CWIACapabilityManager::GetNumCapabilities()
{
return (LONG)m_CapabilityArray.Size();
}
LONG CWIACapabilityManager::GetNumCommands()
{
LONG lNumCommands = 0;
for(INT i = 0; i < m_CapabilityArray.Size(); i++)
{
if((m_CapabilityArray[i].ulFlags != WIA_NOTIFICATION_EVENT) &&
(m_CapabilityArray[i].ulFlags != WIA_ACTION_EVENT))
{
lNumCommands++;
}
}
return lNumCommands;
}
LONG CWIACapabilityManager::GetNumEvents()
{
LONG lNumEvents = 0;
for(INT i = 0; i < m_CapabilityArray.Size(); i++)
{
if((m_CapabilityArray[i].ulFlags == WIA_NOTIFICATION_EVENT) ||
(m_CapabilityArray[i].ulFlags == WIA_ACTION_EVENT))
{
lNumEvents++;
}
}
return lNumEvents;
}
WIA_DEV_CAP_DRV* CWIACapabilityManager::GetCapabilities()
{
return &m_CapabilityArray[0];
}
WIA_DEV_CAP_DRV* CWIACapabilityManager::GetCommands()
{
return &m_CapabilityArray[GetNumEvents()];
}
WIA_DEV_CAP_DRV* CWIACapabilityManager::GetEvents()
{
return &m_CapabilityArray[0];
}
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