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windows-nt/Source/XPSP1/NT/multimedia/dshow/mfvideo/tvplayer/msmfcnt/ccobj.cpp

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2020-09-26 03:20:57 -05:00
/*************************************************************************/
/* Copyright (C) 1999 Microsoft Corporation */
/* File: CCObj.cpp */
/* Description: Contains holder for container objects. */
/*************************************************************************/
#include "stdafx.h"
#include "ccobj.h"
#define GET_SITE CComPtr<IOleInPlaceSiteWindowless> pSite; \
HRESULT hr = GetWindowlessSite(pSite); \
if(FAILED(hr)) return(hr);
#define GET_CONTAINER CComPtr<IOleContainer> pContainer; \
HRESULT hr = GetContainer(pContainer); \
if(FAILED(hr)) return(hr);
/*************************************************************************/
/* Function: CContainerObject */
/* Description: Constructor that should set needed objects. */
/*************************************************************************/
CContainerObject::CContainerObject(IUnknown* pUnknown, CHostedObject* pObj){
Init();
SetObjects(pUnknown, pObj);
}/* end of function CContainerObject */
/*************************************************************************/
/* Function: SetObjects */
/* Description: Sets the internal objects. */
/*************************************************************************/
HRESULT CContainerObject::SetObjects(IUnknown* pUnknown, CHostedObject* pObj){
m_pUnkContainer = pUnknown;
m_pObj = pObj;
return(S_OK);
}/* end of function SetObjects */
/*************************************************************************/
/* Function: Init */
/* Description: Initializes the member variables */
/*************************************************************************/
void CContainerObject::Init(){
//m_pUnkContainer = NULL; // using smart pointer
m_pObj = NULL;
m_lRefCount = 1;
m_bLocked = 0;
}/* end of function Init */
/*************************************************************************/
/* Function: QueryInterface */
/* Description: Gets the supported interface rest sends to the aggregated*/
/* object */
/*************************************************************************/
STDMETHODIMP CContainerObject::QueryInterface(const IID& iid, void**ppv){
if(iid == IID_IUnknown){
*ppv = static_cast<CContainerObject*>(this);
}
else if(iid == IID_IOleInPlaceSiteWindowless){
*ppv = static_cast<IOleInPlaceSiteWindowless*>(this);
}
else if(iid == IID_IOleInPlaceSiteEx){
*ppv = static_cast<IOleInPlaceSiteEx*>(this);
}
else if(iid == IID_IOleClientSite){
*ppv = static_cast<IOleClientSite*>(this);
}
else if(iid == IID_IOleContainer){
*ppv = static_cast<IOleContainer*>(this);
}
else if(iid == IID_IOleInPlaceSite){
*ppv = static_cast<IOleInPlaceSite*>(this);
}
else if(iid == IID_IObjectWithSite){
*ppv = static_cast<IObjectWithSite*>(this);
}
else if(iid == IID_IPropertyBag){
*ppv = static_cast<IPropertyBag*>(this);
}
// TODO: Not Right way to agregate
// this breaks the rules since we really do not
// have non delegating object there
else { // blindly aggregate
if(!m_pUnkContainer){
*ppv = NULL;
return (E_NOINTERFACE);
}/* end of if statement */
return(m_pUnkContainer->QueryInterface(iid, ppv));
}/* end of if statement */
reinterpret_cast<IUnknown*>(*ppv)->AddRef();
return(S_OK);
}/* end of function QueryInterface */
/*************************************************************************/
/* Function: AddRef */
/* Description: Adds the reference count. */
/*************************************************************************/
STDMETHODIMP_(ULONG) CContainerObject::AddRef ( void){
return(InterlockedIncrement(&m_lRefCount));
}/* end of function AddRef */
/*************************************************************************/
/* Function: Release */
/* Description: Decrements the reference count and the possibly releases */
/*************************************************************************/
STDMETHODIMP_(ULONG) CContainerObject::Release( void){
if(InterlockedIncrement(&m_lRefCount) <=0){
delete this;
return 0;
}/* end of if statement */
return (m_lRefCount);
}/* end of function Release */
/*************************************************************************/
/* Helper functions */
/*************************************************************************/
/*************************************************************************/
/* Function: GetWindowlessSite */
/* Description: Returns an interface for windowless site. */
/*************************************************************************/
inline HRESULT CContainerObject::GetWindowlessSite(CComPtr<IOleInPlaceSiteWindowless>& pSite){
if(!m_pUnkContainer){
return(E_UNEXPECTED);
}/* end of if statement */
return(m_pUnkContainer->QueryInterface(&pSite));
}/* end of function GetWindowlessSite */
/*************************************************************************/
/* Function: GetContainer */
/* Description: Returns an interface for windowless site. */
/*************************************************************************/
inline HRESULT CContainerObject::GetContainer(CComPtr<IOleContainer>& pContainer){
if(!m_pUnkContainer){
return(E_UNEXPECTED);
}/* end of if statement */
return(m_pUnkContainer->QueryInterface(&pContainer));
}/* end of function GetContainer */
/*************************************************************************/
/* IOleContainer Implementation */
/*************************************************************************/
/*************************************************************************/
/* Function: ParseDisplayName */
/*************************************************************************/
STDMETHODIMP CContainerObject::ParseDisplayName(IBindCtx* /*pbc*/,
LPOLESTR /*pszDisplayName*/, ULONG* /*pchEaten*/, IMoniker** /*ppmkOut*/){
ATLTRACENOTIMPL(_T("IOleClientSite::ParseDisplayName"));
}/* end of function ParseDisplayName */
/*************************************************************************/
/* Function: EnumObjects */
/*************************************************************************/
STDMETHODIMP CContainerObject::EnumObjects(DWORD grfFlags, IEnumUnknown** ppenum){
GET_CONTAINER
return(pContainer->EnumObjects(grfFlags, ppenum));
}/* end of function EnumObjects */
/*************************************************************************/
/* Function: LockContainer */
/* Description: Sets the container locked so it does not go away. */
/*************************************************************************/
STDMETHODIMP CContainerObject::LockContainer(BOOL fLock){
// TODO: Actually do use the m_bLocked flag
m_bLocked = fLock;
return S_OK;
}/* end of function LockContainer */
/*************************************************************************/
/* IOleClientSite Implementation */
/*************************************************************************/
/*************************************************************************/
/* Function: GetContainer */
/* Description: Basically returns our self */
/*************************************************************************/
STDMETHODIMP CContainerObject::GetContainer(IOleContainer** ppContainer){
ATLTRACE2(atlTraceHosting, 0, _T("IOleClientSite::GetContainer\n"));
HRESULT hr = E_POINTER;
if (NULL == ppContainer){
return(hr);
}/* end of if statement */
if (m_pUnkContainer){
(*ppContainer) = NULL;
hr = QueryInterface(IID_IOleContainer, (void**)ppContainer); // return our selfs
}/* end of if statement */
return hr;
}/* end of function GetContainer */
/*************************************************************************/
/* Function: ShowObject */
/* Description: Redraws the object. */
/*************************************************************************/
STDMETHODIMP CContainerObject::ShowObject(){
HRESULT hr = S_OK;
ATLTRACE2(atlTraceHosting, 0, _T("IOleClientSite::ShowObject\r\n"));
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
hr = InvalidateObjectRect();
return (hr);
}/* end of function ShowObject */
/*************************************************************************/
/* Function: OnShowWindow */
/* Description: Shows or hides the window. If no window to show or hide */
/* we deactivate it. */
/*************************************************************************/
STDMETHODIMP CContainerObject::OnShowWindow(BOOL fShow){
HRESULT hr = S_OK;
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
hr = m_pObj->SetActive(fShow ? true: false);
return(hr);
}/* end of function OnShowWindow */
/*************************************************************************/
/* IOleInPlaceSiteEx Implementation */
/* Just pass throw in most cases, in some do some extra house keeping */
/* since we know which object we are containing. */
/*************************************************************************/
// IOleWindow
/*************************************************************************/
/* Function: GetWindow */
/*************************************************************************/
STDMETHODIMP CContainerObject::GetWindow(HWND *phwnd){
GET_SITE
return(pSite->GetWindow(phwnd));
}/* end of function GetWindow */
/*************************************************************************/
/* Function: ContextSensitiveHelp */
/*************************************************************************/
STDMETHODIMP CContainerObject::ContextSensitiveHelp(BOOL fEnterMode){
GET_SITE
return(pSite->ContextSensitiveHelp(fEnterMode));
}/* end of function ContextSensitiveHelp */
//IOleInPlaceSite
/*************************************************************************/
/* Function: CanInPlaceActivate */
/*************************************************************************/
STDMETHODIMP CContainerObject::CanInPlaceActivate(){
GET_SITE
return(pSite->CanInPlaceActivate());
}/* end of function CanInPlaceActivate */
/*************************************************************************/
/* Function: OnUIActivate */
/*************************************************************************/
STDMETHODIMP CContainerObject::OnUIActivate(){
GET_SITE
return(pSite->OnUIActivate());
}/* end of function OnUIActivate */
/*************************************************************************/
/* Function: OnInPlaceActivate */
/* Description: Activates non windowless object. */
/*************************************************************************/
STDMETHODIMP CContainerObject::OnInPlaceActivate(){
ATLTRACE(TEXT("CContainerObject::OnInPlaceActivate \n"));
HRESULT hr = E_FAIL;
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
CComPtr<IUnknown> pUnk = m_pObj->GetUnknown(); // get the control object that is being inserted
if(!pUnk){
return(E_UNEXPECTED);
}/* end of if statement */
//OleLockRunning(pUnk, TRUE, FALSE); // not sure if needed here
m_pObj->SetWindowless(false);
//m_pObj->SetActive(true);
return(hr);
}/* end of function OnInPlaceActivate */
/*************************************************************************/
/* Function: OnUIDeactivate */
/* Description: Deactivates the object. */
/*************************************************************************/
STDMETHODIMP CContainerObject::OnUIDeactivate(BOOL fUndoable){
HRESULT hr = S_OK;
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
m_pObj->SetActive(false);
ATLTRACE(TEXT("TODO: In the deactivation code, time to cleanup the contained object!!! \n"));
return(hr);
}/* end of function OnUIDeactivate */
/*************************************************************************/
/* Function: OnInPlaceDeactivate */
/* Description: Deactivates the object. */
/*************************************************************************/
STDMETHODIMP CContainerObject::OnInPlaceDeactivate(){
HRESULT hr = S_OK;
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
m_pObj->SetActive(false);
ATLTRACE(TEXT("TODO: In the deactivation code, time to cleanup the contained object!!! \n"));
return(hr);
}/* end of function OnInPlaceDeactivate */
/*************************************************************************/
/* Function: DiscardUndoState */
/*************************************************************************/
STDMETHODIMP CContainerObject::DiscardUndoState(){
GET_SITE
return(pSite->DiscardUndoState());
}/* end of function DiscardUndoState */
/*************************************************************************/
/* Function: DeactivateAndUndo */
/*************************************************************************/
STDMETHODIMP CContainerObject::DeactivateAndUndo(){
GET_SITE
return(pSite->DeactivateAndUndo());
// TODO: Handle specific container
}/* end of function DeactivateAndUndo */
/*************************************************************************/
/* Function: OnPosRectChange */
/*************************************************************************/
STDMETHODIMP CContainerObject::OnPosRectChange(LPCRECT lprcPosRect){
GET_SITE
return(pSite->OnPosRectChange(lprcPosRect));
// TODO: Handle specific container
}/* end of function OnPosRectChange */
/*************************************************************************/
/* Function: Scroll */
/*************************************************************************/
STDMETHODIMP CContainerObject::Scroll(SIZE scrollExtent){
GET_SITE
return(pSite->Scroll(scrollExtent));
// TODO: Handle specific container
}/* end of function OnPosRectChange */
/*************************************************************************/
/* Function: GetWindowContext */
/* Description: Finish this function to be container specific. */
/*************************************************************************/
STDMETHODIMP CContainerObject::GetWindowContext(IOleInPlaceFrame** ppFrame,
IOleInPlaceUIWindow** ppDoc, LPRECT lprcPosRect,
LPRECT lprcClipRect, LPOLEINPLACEFRAMEINFO pFrameInfo){
HRESULT hr = S_OK;
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
if (ppFrame == NULL || ppDoc == NULL || lprcPosRect == NULL || lprcClipRect == NULL){
hr = E_POINTER;
return(hr);
}/* end of if statement */
if (!m_spInPlaceFrame){
//CComObject<CAxFrameWindow>* pFrameWindow;
//CComObject<CAxFrameWindow>::CreateInstance(&pFrameWindow);
// ?? MODS DJ
QueryInterface(IID_IOleInPlaceFrame, (void**) &m_spInPlaceFrame);
ATLASSERT(m_spInPlaceFrame);
}/* end of if statement */
if (!m_spInPlaceUIWindow){
// ?? MODS DJ
//CComObject<CAxUIWindow>* pUIWindow;
//CComObject<CAxUIWindow>::CreateInstance(&pUIWindow);
QueryInterface(IID_IOleInPlaceUIWindow, (void**) &m_spInPlaceUIWindow);
ATLASSERT(m_spInPlaceUIWindow);
}/* end of if statement */
m_spInPlaceFrame.CopyTo(ppFrame);
m_spInPlaceUIWindow.CopyTo(ppDoc);
RECT rc;
hr = m_pObj->GetPos(&rc);
if(FAILED(hr)){
return(hr);
}/* end of if statement */
*lprcPosRect = rc;
*lprcClipRect = rc;
HWND hwnd;
hr = GetWindow(&hwnd);
if(FAILED(hr)){
hr = S_FALSE;
//return(hr);
}/* end of if statement */
HWND hParent = NULL;
if(NULL != hwnd){
hParent = ::GetParent(hwnd);
}/* end of function GetParent */
ACCEL ac = { 0,0,0 };
HACCEL hac = ::CreateAcceleratorTable(&ac, 1);
pFrameInfo->cb = sizeof(OLEINPLACEFRAMEINFO);
pFrameInfo->fMDIApp = 0;
pFrameInfo->hwndFrame = hParent;
pFrameInfo->haccel = hac;
pFrameInfo->cAccelEntries = 1;
return hr;
}/* end of function GetWindowContext */
/*************************************************************************/
/* Function: GetSite */
/* Description: Returns pretty much QI, client sets the site and then */
/* container is using it. */
/*************************************************************************/
STDMETHODIMP CContainerObject::GetSite(REFIID riid, void **ppvSite){
return(QueryInterface(riid, ppvSite));
}/* end of function GetSite */
//IOleInPlaceSiteEx
/*************************************************************************/
/* Function: OnInPlaceActivateEx */
/* Description: Checks what way we shall instantiate the control. */
/*************************************************************************/
STDMETHODIMP CContainerObject::OnInPlaceActivateEx(BOOL* /*pfNoRedraw*/, DWORD dwFlags){
HRESULT hr = E_FAIL;
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
CComPtr<IUnknown> pUnk = m_pObj->GetUnknown(); // get the control object that is being inserted
if(!pUnk){
return(E_UNEXPECTED);
}/* end of if statement */
OleLockRunning(pUnk, TRUE, FALSE);
CComPtr<IOleInPlaceObjectWindowless> spInPlaceObjectWindowless;
bool bWindowless = false;
if (dwFlags & ACTIVATE_WINDOWLESS){
m_pObj->SetWindowless(true);
hr = pUnk->QueryInterface(IID_IOleInPlaceObjectWindowless,(void**) &spInPlaceObjectWindowless);
}/* end of if statement */
if (FAILED(hr)){
m_pObj->SetWindowless(false);
hr = pUnk->QueryInterface(IID_IOleInPlaceObject, (void**) &spInPlaceObjectWindowless);
}/* end of if statement */
if (SUCCEEDED(hr)){
RECT rcPos;
hr = m_pObj->GetPos(&rcPos);
if (FAILED(hr)){
return(hr);
}/* end of if statement */
if(m_pObj->IsWindowless()){
spInPlaceObjectWindowless->SetObjectRects(&rcPos, &rcPos);
ATLTRACE(TEXT("Windowless object is contained object with ID %ls Rect left = %d top %d right %d bottom %d\n"),
m_pObj->GetID(), rcPos.left, rcPos.top, rcPos.right, rcPos.bottom);
}/* end of if statement */
}/* end of if statement */
//m_pObj->SetActive(true);
return S_OK;
}/* end of function OnInPlaceActivateEx */
/*************************************************************************/
/* Function: OnInPlaceDeactivateEx */
/* Description: Deactivates the object. */
/*************************************************************************/
STDMETHODIMP CContainerObject::OnInPlaceDeactivateEx(BOOL fNoRedraw){
HRESULT hr = S_OK;
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
m_pObj->SetActive(false);
ATLTRACE(TEXT("TODO: In the deactivation code, time to cleanup the contained object!!! \n"));
return(hr);
}/* end of function OnInPlaceDeactivateEx */
/*************************************************************************/
/* Function: RequestUIActivate */
/*************************************************************************/
STDMETHODIMP CContainerObject::RequestUIActivate(){
GET_SITE
return(pSite->RequestUIActivate());
}/* end of function RequestUIActivate */
/*************************************************************************/
/* Function: CanWindowlessActivate */
/*************************************************************************/
STDMETHODIMP CContainerObject::CanWindowlessActivate(){
GET_SITE
return(pSite->CanWindowlessActivate());
}/* end of function CanWindowlessActivate */
/*************************************************************************/
/* Function: GetDC */
/*************************************************************************/
STDMETHODIMP CContainerObject::GetDC(LPCRECT pRect, DWORD grfFlags, HDC* phDC){
GET_SITE
return(pSite->GetDC(pRect, grfFlags, phDC));
}/* end of function GetDC */
/*************************************************************************/
/* Function: ReleaseDC */
/*************************************************************************/
STDMETHODIMP CContainerObject::ReleaseDC(HDC hDC){
GET_SITE
return(pSite->ReleaseDC(hDC));
}/* end of function ReleaseDC */
/*************************************************************************/
/* Function: InvalidateRect */
/*************************************************************************/
STDMETHODIMP CContainerObject::InvalidateRect(LPCRECT pRect, BOOL fErase){
GET_SITE
return(pSite->InvalidateRect(pRect, fErase));
}/* end of function InvalidateRect */
/*************************************************************************/
/* Function: InvalidateObjectRect */
/* Description: Invalidates the whole control. */
/*************************************************************************/
HRESULT CContainerObject::InvalidateObjectRect(){
HRESULT hr = S_OK;
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
RECT rc;
hr = m_pObj->GetPos(&rc);
if(FAILED(hr)){
return(hr);
}/* end of if statement */
hr = InvalidateRect(&rc, FALSE); // invalidate the region instead
// of drawing the object directly
return(hr);
}/* end of function InvalidateRect */
/*************************************************************************/
/* Function: InvalidateRgn */
/*************************************************************************/
STDMETHODIMP CContainerObject::InvalidateRgn(HRGN hRGN, BOOL fErase){
GET_SITE
return(pSite->InvalidateRgn(hRGN, fErase));
}/* end of function InvalidateRgn */
/*************************************************************************/
/* Function: ScrollRect */
/*************************************************************************/
STDMETHODIMP CContainerObject::ScrollRect(INT dx, INT dy, LPCRECT pRectScroll, LPCRECT pRectClip){
GET_SITE
return(pSite->ScrollRect(dx, dy, pRectScroll, pRectClip));
}/* end of function ScrollRect */
/*************************************************************************/
/* Function: AdjustRect */
/*************************************************************************/
STDMETHODIMP CContainerObject::AdjustRect(LPRECT prc){
GET_SITE
return(pSite->AdjustRect(prc));
}/* end of function AdjustRect */
/*************************************************************************/
/* Function: OnDefWindowMessage */
/*************************************************************************/
STDMETHODIMP CContainerObject::OnDefWindowMessage(UINT msg, WPARAM wParam, LPARAM lParam, LRESULT* plResult){
GET_SITE
return(pSite->OnDefWindowMessage(msg, wParam, lParam, plResult));
}/* end of function OnDefWindowMessage */
/*************************************************************************/
/* Function: GetCapture */
/* Description: Used to determine if we have a cupature or not */
/*************************************************************************/
STDMETHODIMP CContainerObject::GetCapture(){
GET_SITE
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
hr = pSite->GetCapture();
if(SUCCEEDED(hr)){
// we checked with the container if we
// have a capture
if(m_pObj->HasCapture() == false){
hr = S_FALSE;
}
else {
if(hr == S_FALSE){
// case when the container say we do not have
// the capture any more
// but the object thinks it has a capture
// we better reset the flag
m_pObj->SetCapture(false);
// and say that we do not have capture
hr = S_FALSE;
}/* end of if statement */
}/* end of if statement */
}/* end of if statement */
return(hr);
}/* end of function GetCapture */
/*************************************************************************/
/* Function: SetCapture */
/* Description: Used to set the capture for mouse events */
/*************************************************************************/
STDMETHODIMP CContainerObject::SetCapture(BOOL fCapture){
GET_SITE
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
if(fCapture && !m_pObj->IsActive()){
hr = S_FALSE;
return(hr);
}/* end of if statement */
if(m_pObj->HasCapture() == (fCapture ? true: false)){
hr = S_FALSE;
return(hr);
}/* end of if statement */
// Call our "real" container object for count keeping
// and signaling to its window or another container
hr = pSite->SetCapture(fCapture);
if(SUCCEEDED(hr)){
m_pObj->SetCapture(fCapture? true: false); // set the capture on the object
}/* end of if statement */
return (hr);
}/* end of function SetCapture */
/*************************************************************************/
/* Function: GetFocus */
/* Description: Determine if we have a focus or not. */
/*************************************************************************/
STDMETHODIMP CContainerObject::GetFocus(){
GET_SITE
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
hr = pSite->GetFocus();
if(SUCCEEDED(hr)){
if(m_pObj->HasFocus() == false){
hr = S_FALSE;
}
else {
if(S_FALSE == hr){
m_pObj->SetFocus(false);
hr = S_FALSE;
}/* end of if statement */
}/* end of if statement */
}/* end of if statement */
return(hr);
}/* end of function GetFocus */
/*************************************************************************/
/* Function: SetFocus */
/* Description: Sets focus to the control */
/*************************************************************************/
STDMETHODIMP CContainerObject::SetFocus(BOOL fFocus){
GET_SITE
if(NULL == m_pObj){
hr = E_UNEXPECTED;
return(hr);
}/* end of if statement */
if(fFocus && !m_pObj->IsActive()){
// can't set focus to not active objects
// but can take away focus from non active ones
hr = S_FALSE;
return(hr);
}/* end of if statement */
if(m_pObj->HasFocus() == (fFocus ? true: false)){
// we are not chaning focus state so do not bother calling container
hr = S_FALSE;
return(hr);
}/* end of if statement */
// Call our "real" container object for count keeping
// and signaling to its window or another container
hr = pSite->SetFocus(fFocus);
if(SUCCEEDED(hr)){
m_pObj->SetFocus(fFocus ? true: false); // set the capture on the object
}/* end of if statement */
InvalidateObjectRect();
return (hr);
}/* end of function SetFocus */
/*************************************************************************/
/* Function: SetHostedObject */
/* Description: Sets the control that we are hosting. */
/*************************************************************************/
STDMETHODIMP CContainerObject::SetHostedObject(LONG lVoid){
// TODO!!!
// THIS WILL BREAK ON WIN64
// NEED TO PASS REAL INTERFACE AROUND
HRESULT hr = S_OK;
try {
m_pObj = reinterpret_cast<CHostedObject*>(lVoid);
}
catch(...){
hr = E_UNEXPECTED;
}/* end of catch statement */
return (hr);
}/* end of function SetHostedObject */
/*************************************************************************/
/* IPropertyBag */
/*************************************************************************/
/*************************************************************************/
/* Function: Read */
/* Description: Reads a specific control property from a bag. */
/* The bag looks like IE compatible <PARAM NAME="PropName" VALUE="value">*/
/*************************************************************************/
STDMETHODIMP CContainerObject::Read(LPCOLESTR pszPropName, VARIANT* pVar,
IErrorLog* pErrorLog){
HRESULT hr = S_OK;
try {
ATLTRACE2(atlTraceHosting, 0, _T("IPropertyBag::Read\r\n"));
if(NULL == m_pObj){
throw(E_UNEXPECTED);
}/* end of if statement */
if (NULL == pVar){
throw(E_POINTER);
}/* end of if statement */
hr = ParsePropertyBag(pszPropName, pVar, pErrorLog);
}
catch(...){
hr = E_UNEXPECTED;
}/* end of catch statement */
return (hr);
}/* end of function Read */
/*************************************************************************/
/* Function: MyIsWhiteSpace */
/* Local function implementation, since we do not have standart C lib */
/* support */
/*************************************************************************/
static bool MyIsWhiteSpace( WCHAR c ){
return c == L' ' ||
c == L'\t' ||
c == L'\r' ||
c == L'\n';
}/* end of function MyIsWhiteSpace */
/*************************************************************************/
/* Function: MyStrToDouble */
/* Description: Reads in string and converts it to double */
/* Returns E_INVALIDARG if there is alpah or some other undesired string*/
/* S_OK if we got some string, S_FALSE if no number string (empty or spac*/
/*************************************************************************/
static HRESULT MyStrToDouble(WCHAR* pstr, double &n)
{
HRESULT hr = S_FALSE;
int Sign = 1;
n = 0; // result wil be n*Sign
bool bBeforeDecimalPoint = true;
double k = 10;
// eat whitespace at start
while( *pstr != L'\n' && MyIsWhiteSpace( *pstr ) ) {
pstr++;
}
while( pstr[lstrlenW(pstr)-1]!= L'\n' && MyIsWhiteSpace( *pstr ) ) {
pstr[lstrlenW(pstr)-1] = L'\0';
}
//lstrcmpiW is not implemented on 98 need to use STDLIB
// TODO: eventaully replace the below _wcsicmp with our own so we can remove support
// on standard C library
if (_wcsicmp(pstr, L"true") == 0) {
n = -1;
return S_OK;
}
if (_wcsicmp(pstr, L"false") == 0) {
n = 0;
return S_OK;
}
if (pstr[0]==L'-'){
Sign = -1;
++pstr;
}/* end of if statement */
for( ; ; ) {
if (pstr[0]>=L'0' && pstr[0]<=L'9') {
if(bBeforeDecimalPoint == true){
n = 10*n+(int)(pstr[0]-L'0');
} else {
n = n+ ((int)(pstr[0]-L'0'))/k;
k = k * 10; // decrease the decimal point
}/* end of if statement */
hr = S_OK;
} else if ( MyIsWhiteSpace( pstr[0] ) || pstr[0] == L'\0' ) {
break;
} else if( bBeforeDecimalPoint && pstr[0] == L'.') {
bBeforeDecimalPoint = false;
} else {
hr = E_INVALIDARG;
break;
}/* end of if statement */
++pstr;
}/* end of for loop */
n *= Sign; // adjust the sign
return(hr);
}/* end of function MyStrToDouble */
/*************************************************************************/
/* Function: CompSubstr */
/* Description: ComaparesSubstr, eats up whithe spaces. */
/*************************************************************************/
HRESULT CompSubstr(WCHAR*& strSource, const WCHAR* strKey){
bool bEatSpaces = true;
register WCHAR wcKey = *strKey;
register WCHAR wcSrc = *strSource;
for(INT i = 0; wcKey != NULL; wcSrc = *(++strSource)){
if(bEatSpaces){
// eat up the spaces and tabs and enters and cr
if(MyIsWhiteSpace(wcSrc)){
continue;
}
else {
bEatSpaces = false;
}/* end of if statement */
}/* end of if statement */
if(wcKey != wcSrc){
return(E_FAIL);
}/* end of if statement */
if(NULL == wcSrc){
return(E_FAIL); // ran out of space in the source string
}/* end of if statement */
wcKey = strKey[++i]; // advance the key
}/* end of for loop */
return(S_OK);
}/* end of function CompSubstr */
/*************************************************************************/
/* Function: ParsePropertyBag */
/* Description: Retrives a property from the bag and puts it into variant*/
/* if it fails returns E_FAIL. */
/*************************************************************************/
HRESULT CContainerObject::ParsePropertyBag(LPCOLESTR pszPropName, VARIANT* pVar,
IErrorLog* /* pErrorLog */){
HRESULT hr = S_OK;
try {
BSTR strBag = m_pObj->GetPropBag();
if(NULL == strBag){
throw(E_FAIL);
}/* end of if statement */
WCHAR* strValue = NULL; // the place where we are going to stick the actuall value
// before putting it into variant
WCHAR* strTmpValue = L"";
WCHAR* strTmpBag = strBag;
if(NULL == *strTmpBag){
throw(E_FAIL);
}/* end of if statement */
INT iState = 0; // 0 start
bool fFound = false;
bool fFinished = false;
INT iLength = 0; // noting the start and end of the value string
// now try to parse out the value for the appropriate string
for(INT i = 0; NULL != *strTmpBag && !fFinished; i++){
switch(iState){
case 0: // looking for start <
if(FAILED(CompSubstr(strTmpBag, L"<"))) return (E_FAIL);
iState = 1; break;
case 1: // PARAM
if(FAILED(CompSubstr(strTmpBag, L"PARAM"))) return (E_FAIL);
iState = 2; break;
case 2: // NAME
if(FAILED(CompSubstr(strTmpBag, L"NAME"))) return (E_FAIL);
iState = 3; break;
case 3: // =
if(FAILED(CompSubstr(strTmpBag, L"="))) return (E_FAIL);
iState = 4; break;
case 4: // "
if(FAILED(CompSubstr(strTmpBag, L"\""))) return (E_FAIL);
iState = 5; break;
case 5: // pszPropName (the actual name)
if(SUCCEEDED(CompSubstr(strTmpBag, pszPropName))){
fFound = true; // found the PropName
}/* end of if statement */
iState = 6; break;
case 6: // "
if(SUCCEEDED(CompSubstr(strTmpBag, L"\""))){
iState = 7;
}
else {
strTmpBag++;
}/* end of if statement */
break;
case 7: // VALUE
if(FAILED(CompSubstr(strTmpBag, L"VALUE"))) return (E_FAIL);
iState = 8; break;
case 8: // =
if(FAILED(CompSubstr(strTmpBag, L"="))) return (E_FAIL);
iState = 9; break;
case 9: // "
if(FAILED(CompSubstr(strTmpBag, L"\""))) return (E_FAIL);
iState = 10; break;
case 10: // VALUE
if(fFound){
// read up the string and exit the loop
strTmpValue = strTmpBag;
}/* end of if statement */
iState = 11; break;
case 11: // "
if(SUCCEEDED(CompSubstr(strTmpBag, L"\""))){
iState = 12;
if(fFound){
iLength = strTmpBag - strTmpValue;
strValue = new WCHAR[iLength];
memcpy(strValue, strTmpValue, iLength * sizeof(WCHAR));
strValue[iLength - 1] = NULL;
// read up the string and exit the loop
fFinished = true; // exit the loop
}/* end of if statement */
}
else {
strTmpBag++;
}/* end of if statement */
break;
case 12: // closing brakcet >
if(FAILED(CompSubstr(strTmpBag, L">"))) return (E_FAIL);
iState = 0;
break;
}/* end of switch statement */
}/* end of for loop */
if(!fFinished){
return(E_FAIL);
}/* end of if statement */
// at this moment we have value parsed out
switch(pVar->vt){
case VT_BSTR:
pVar->bstrVal = ::SysAllocString(strValue);
break;
case VT_I4: {
double dbl;
if(MyStrToDouble(strValue, dbl) != S_OK){
// S_FALSE denotes empty string
throw(E_FAIL);
}/* end of if statement */
// TODO: Create MyStrToInt and do not cast
pVar->lVal = (INT)dbl;
}
case VT_UI4:{
double dbl;
if(MyStrToDouble(strValue, dbl) != S_OK){
// S_FALSE denotes empty string
throw(E_FAIL);
}/* end of if statement */
// TODO: Create MyStrToInt and do not cast
pVar->ulVal = (ULONG)dbl;
}
break;
case VT_R4: {
double dbl;
if(MyStrToDouble(strValue, dbl) != S_OK){
// S_FALSE denotes empty string
throw(E_FAIL);
}/* end of if statement */
// TODO: Create MyStrToInt and do not cast
pVar->fltVal = (FLOAT) dbl;
}
break;
case VT_R8: {
double dbl;
if(MyStrToDouble(strValue, dbl) != S_OK){
// S_FALSE denotes empty string
throw(E_FAIL);
}/* end of if statement */
// TODO: Create MyStrToInt and do not cast
pVar->dblVal = dbl;
}
break;
case VT_BOOL: {
double dbl;
if(MyStrToDouble(strValue, dbl) != S_OK){
// S_FALSE denotes empty string
throw(E_FAIL);
}/* end of if statement */
// TODO: Create MyStrToInt and do not cast
if(0.0 == dbl){
pVar->boolVal = VARIANT_FALSE;
}
else if(1.0 == dbl || -1.0 == dbl){
pVar->boolVal = VARIANT_TRUE;
}
else {
throw(E_FAIL);
}/* end of if statement */
}
break;
default:
ATLTRACE2(atlTraceHosting, 0, _T("This type is not implemented please add.\r\n"));
ATLASSERT(FALSE);
throw(E_FAIL);
}/* end of switch statement */
delete strValue; // cleanup our variable
}
catch(...){
hr = E_UNEXPECTED;
}/* end of catch statement */
return (hr);
}/* end of function ParsePropertyBag */
/*************************************************************************/
/* End of file: CCObj.cpp */
/*************************************************************************/
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