292 lines
10 KiB
C++
292 lines
10 KiB
C++
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/*******************************************************************************
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*
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* (C) COPYRIGHT MICROSOFT CORPORATION, 1998
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*
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* TITLE: UIEXTHLP.CPP
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*
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* VERSION: 1.0
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*
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* AUTHOR: ShaunIv
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*
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* DATE: 7/8/1999
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*
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* DESCRIPTION: Helper functions for loading UI extensions for WIA devices
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*
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*******************************************************************************/
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#include "precomp.h"
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#pragma hdrstop
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#include <initguid.h>
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#include "uiexthlp.h"
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#include "wiadevd.h"
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#include "wiadevdp.h"
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#include "itranhlp.h"
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#include "isuppfmt.h"
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#include "wiaffmt.h"
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namespace WiaUiExtensionHelper
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{
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/*
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* Get the clsid of the DLL that implements the interface in the given category
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* Example: GetDeviceExtensionClassID( L"{5d8ef5a3-ac13-11d2-a093-00c04f72dc3c}", TEXT("WiaDialogExtensionHandlers"), iid );
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* where:
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* L"{5d8ef5a3-ac13-11d2-a093-00c04f72dc3c}" is the GUID stored in the WIA property WIA_DIP_UI_CLSID
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* TEXT("WiaDialogExtensionHandlers") is the category of extension
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* iid is a reference to the CLSID of the in process COM object
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*/
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HRESULT GetDeviceExtensionClassID( LPCWSTR pwszUiClassId, LPCTSTR pszCategory, IID &iidClassID )
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{
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TCHAR szRootKeyName[1024];
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HRESULT hr = E_FAIL;
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// Make sure all of the parameters are valid
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if (pwszUiClassId && pszCategory && lstrlenW(pwszUiClassId) && lstrlen(pszCategory))
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{
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// construct the key name
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wsprintf( szRootKeyName, TEXT("CLSID\\%ws\\shellex\\%s"), pwszUiClassId, pszCategory );
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HKEY hKeyRoot;
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// open the reg key
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DWORD dwResult = RegOpenKeyEx( HKEY_CLASSES_ROOT, szRootKeyName, 0, KEY_READ, &hKeyRoot );
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if (ERROR_SUCCESS == dwResult)
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{
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TCHAR szClassID[MAX_PATH];
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DWORD dwLength = ARRAYSIZE(szClassID);
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// Note that we only take the first one
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dwResult = RegEnumKeyEx( hKeyRoot, 0, szClassID, &dwLength, NULL, NULL, NULL, NULL );
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if (ERROR_SUCCESS == dwResult)
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{
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#if defined(UNICODE)
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hr = CLSIDFromString(szClassID, &iidClassID);
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#else
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WCHAR wszClassID[MAX_PATH];
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MultiByteToWideChar (CP_ACP, 0, szClassID, -1, wszClassID, MAX_PATH );
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hr = CLSIDFromString (wszClassID, &iidClassID);
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#endif
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}
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else hr = HRESULT_FROM_WIN32(dwResult);
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RegCloseKey(hKeyRoot);
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}
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else hr = HRESULT_FROM_WIN32(dwResult);
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}
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else hr = E_INVALIDARG;
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return hr;
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}
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HRESULT CreateDeviceExtension( LPCWSTR pwszUiClassId, LPCTSTR pszCategory, const IID &iid, void **ppvObject )
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{
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IID iidClassID;
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HRESULT hr = GetDeviceExtensionClassID( pwszUiClassId, pszCategory, iidClassID );
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if (SUCCEEDED(hr))
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{
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WIA_PRINTGUID((iidClassID,TEXT("Calling CoCreateInstance on")));
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WIA_PRINTGUID((iid,TEXT("Attempting to get an interface pointer for")));
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hr = CoCreateInstance( iidClassID, NULL, CLSCTX_INPROC_SERVER, iid, ppvObject );
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}
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return hr;
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}
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HRESULT GetUiGuidFromWiaItem( IWiaItem *pWiaItem, LPWSTR pwszGuid )
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{
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IWiaPropertyStorage *pPropertyStorage = NULL;
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HRESULT hr;
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if (pWiaItem && pwszGuid)
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{
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hr = pWiaItem->QueryInterface( IID_IWiaPropertyStorage, (void**)&pPropertyStorage );
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if (SUCCEEDED(hr))
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{
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PROPSPEC ps[1];
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PROPVARIANT pv[1];
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ps[0].ulKind = PRSPEC_PROPID;
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ps[0].propid = WIA_DIP_UI_CLSID;
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hr = pPropertyStorage->ReadMultiple(sizeof(ps)/sizeof(ps[0]), ps, pv);
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if (SUCCEEDED(hr))
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{
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if (VT_LPWSTR == pv[0].vt || VT_BSTR == pv[0].vt)
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{
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lstrcpyW( pwszGuid, pv[0].bstrVal );
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hr = S_OK;
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}
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FreePropVariantArray( sizeof(pv)/sizeof(pv[0]), pv );
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}
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pPropertyStorage->Release();
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}
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}
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else hr = E_INVALIDARG;
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return hr;
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}
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HRESULT GetDeviceExtensionClassID( IWiaItem *pWiaItem, LPCTSTR pszCategory, IID &iidClassID )
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{
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WCHAR wszGuid[MAX_PATH];
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HRESULT hr = GetUiGuidFromWiaItem(pWiaItem,wszGuid);
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if (SUCCEEDED(hr))
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{
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hr = GetDeviceExtensionClassID( wszGuid, pszCategory, iidClassID );
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}
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return hr;
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}
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HRESULT CreateDeviceExtension( IWiaItem *pWiaItem, LPCTSTR pszCategory, const IID &iid, void **ppvObject )
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{
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WCHAR wszGuid[MAX_PATH];
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HRESULT hr = GetUiGuidFromWiaItem(pWiaItem,wszGuid);
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if (SUCCEEDED(hr))
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{
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hr = CreateDeviceExtension( wszGuid, pszCategory, iid, ppvObject );
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}
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return hr;
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}
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HRESULT GetDeviceIcons( IWiaUIExtension *pWiaUIExtension, BSTR bstrDeviceId, HICON *phIconSmall, HICON *phIconLarge, UINT nIconSize )
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{
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if (!pWiaUIExtension || !bstrDeviceId || !lstrlenW(bstrDeviceId))
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return E_INVALIDARG;
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// Assume success
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HRESULT hr = S_OK;
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// Get the small icon, if requested. Return on failure
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if (phIconSmall)
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{
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hr = pWiaUIExtension->GetDeviceIcon(bstrDeviceId,phIconSmall,HIWORD(nIconSize));
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if (FAILED(hr))
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{
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return hr;
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}
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}
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// Get the large icon, if requested. Return on failure
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if (phIconLarge)
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{
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hr = pWiaUIExtension->GetDeviceIcon(bstrDeviceId,phIconLarge,LOWORD(nIconSize));
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if (FAILED(hr))
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{
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return hr;
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}
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}
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return hr;
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}
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HRESULT GetDeviceIcons( BSTR bstrDeviceId, LONG nDeviceType, HICON *phIconSmall, HICON *phIconLarge, UINT nIconSize )
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{
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WIA_PUSH_FUNCTION((TEXT("GetDeviceIcons( %ws, %08X, %p, %p, %d )"), bstrDeviceId, nDeviceType, phIconSmall, phIconLarge, nIconSize ));
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// Check args
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if (!bstrDeviceId || !lstrlenW(bstrDeviceId))
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{
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return E_INVALIDARG;
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}
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// Initialize the icons, if necessary
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if (phIconSmall)
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{
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*phIconSmall = NULL;
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}
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if (phIconLarge)
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{
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*phIconLarge = NULL;
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}
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if (!nIconSize)
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{
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int iLarge = GetSystemMetrics(SM_CXICON);
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int iSmall = GetSystemMetrics(SM_CXSMICON);
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nIconSize = (UINT)MAKELONG(iLarge, iSmall);
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}
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// Assume we'll use our own icons
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bool bUseDefaultUI = true;
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// Try to load device ui extension
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CComPtr<IWiaUIExtension> pWiaUIExtension;
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HRESULT hr = WiaUiExtensionHelper::CreateDeviceExtension( bstrDeviceId, SHELLEX_WIAUIEXTENSION_NAME, IID_IWiaUIExtension, (void **)&pWiaUIExtension );
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if (SUCCEEDED(hr))
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{
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hr = GetDeviceIcons( pWiaUIExtension, bstrDeviceId, phIconSmall, phIconLarge, nIconSize );
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if (SUCCEEDED(hr) || hr != E_NOTIMPL)
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{
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bUseDefaultUI = false;
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}
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WIA_PRINTHRESULT((hr,TEXT("GetDeviceIcons returned")));
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}
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else
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{
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WIA_PRINTHRESULT((hr,TEXT("WiaUiExtensionHelper::CreateDeviceExtension failed")));
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}
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WIA_TRACE((TEXT("bUseDefaultUI: %d"), bUseDefaultUI ));
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// Use our own extensions (the default UI). We use IWiaMiscellaneousHelpers::GetDeviceIcon, because
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// finding the device type given only a device id is horribly slow, since we have to create a device
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// manager AND enumerate devices until we find a match. Ugh.
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if (bUseDefaultUI)
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{
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CComPtr<IWiaMiscellaneousHelpers> pWiaMiscellaneousHelpers;
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hr = CoCreateInstance( CLSID_WiaDefaultUi, NULL, CLSCTX_INPROC_SERVER, IID_IWiaMiscellaneousHelpers, (void**)(&pWiaMiscellaneousHelpers) );
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if (SUCCEEDED(hr) && phIconSmall)
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{
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hr = pWiaMiscellaneousHelpers->GetDeviceIcon( nDeviceType, phIconSmall, HIWORD(nIconSize));
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}
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if (SUCCEEDED(hr) && phIconLarge)
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{
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hr = pWiaMiscellaneousHelpers->GetDeviceIcon( nDeviceType, phIconLarge, LOWORD(nIconSize) );
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}
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if (FAILED(hr))
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{
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if (phIconSmall && *phIconSmall)
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{
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DestroyIcon(*phIconSmall);
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}
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if (phIconLarge && *phIconLarge)
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{
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DestroyIcon(*phIconLarge);
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}
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}
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}
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return hr;
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}
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CSimpleString GetExtensionFromGuid( IWiaItem *pWiaItem, const GUID &guidFormat )
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{
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//
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// Use the supplied format to get the extension
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//
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GUID guidFormatToUse = guidFormat;
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//
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// If we don't have a supplied format, get the default format and use that
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//
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if (IID_NULL == guidFormatToUse)
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{
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//
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// Get the IWiaSupportedFormats interface
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//
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CComPtr<IWiaSupportedFormats> pWiaSupportedFormats;
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HRESULT hr = CoCreateInstance( CLSID_WiaDefaultUi, NULL, CLSCTX_INPROC_SERVER, IID_IWiaSupportedFormats, (void**)&pWiaSupportedFormats );
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if (SUCCEEDED(hr))
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{
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//
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// Tell it we want file information for pWiaItem
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//
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hr = pWiaSupportedFormats->Initialize( pWiaItem, TYMED_FILE );
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if (SUCCEEDED(hr))
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{
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//
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// Get the default format
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//
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GUID guidDefFormat;
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hr = pWiaSupportedFormats->GetDefaultClipboardFileFormat( &guidDefFormat );
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if (SUCCEEDED(hr))
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{
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//
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// Save this format and use it.
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//
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guidFormatToUse = guidDefFormat;
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}
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}
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}
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}
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return CWiaFileFormat::GetExtension( guidFormatToUse, TYMED_FILE, pWiaItem );
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}
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}
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