128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
#include "shellprv.h"
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#include "treewkcb.h"
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#include "propsht.h"
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CBaseTreeWalkerCB::CBaseTreeWalkerCB(): _cRef(1)
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{
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}
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CBaseTreeWalkerCB::~CBaseTreeWalkerCB()
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{
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}
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HRESULT CBaseTreeWalkerCB::QueryInterface(REFIID riid, void **ppv)
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{
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static const QITAB qit[] = {
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QITABENT(CBaseTreeWalkerCB, IShellTreeWalkerCallBack),
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{ 0 },
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};
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return QISearch(this, qit, riid, ppv);
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}
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ULONG CBaseTreeWalkerCB::AddRef()
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{
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return InterlockedIncrement(&_cRef);
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}
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ULONG CBaseTreeWalkerCB::Release()
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{
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if (InterlockedDecrement(&_cRef))
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return _cRef;
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delete this;
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return 0;
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}
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HRESULT CBaseTreeWalkerCB::FoundFile(LPCWSTR pwszPath, TREEWALKERSTATS *ptws, WIN32_FIND_DATAW * pwfd)
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{
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return E_NOTIMPL;
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}
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HRESULT CBaseTreeWalkerCB::EnterFolder(LPCWSTR pwszPath, TREEWALKERSTATS *ptws, WIN32_FIND_DATAW * pwfd)
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{
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return E_NOTIMPL;
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}
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HRESULT CBaseTreeWalkerCB::LeaveFolder(LPCWSTR pwszPath, TREEWALKERSTATS *ptws)
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{
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return E_NOTIMPL;
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}
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HRESULT CBaseTreeWalkerCB::HandleError(LPCWSTR pwszPath, TREEWALKERSTATS *ptws, HRESULT ErrorCode)
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{
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return E_NOTIMPL;
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}
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//
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// Folder size computation tree walker callback class
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//
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class CFolderSizeTreeWalkerCB : public CBaseTreeWalkerCB
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{
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public:
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CFolderSizeTreeWalkerCB(FOLDERCONTENTSINFO * pfci);
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// IShellTreeWalkerCallBack
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STDMETHODIMP FoundFile(LPCWSTR pwszPath, TREEWALKERSTATS *ptws, WIN32_FIND_DATAW * pwfd);
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STDMETHODIMP EnterFolder(LPCWSTR pwszPath, TREEWALKERSTATS *ptws, WIN32_FIND_DATAW * pwfd);
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protected:
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FOLDERCONTENTSINFO * _pfci;
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TREEWALKERSTATS _twsInitial;
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};
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CFolderSizeTreeWalkerCB::CFolderSizeTreeWalkerCB(FOLDERCONTENTSINFO * pfci): _pfci(pfci)
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{
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// set the starting values for the twsInitial so we can have cumulative results
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_twsInitial.nFiles = _pfci->cFiles;
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_twsInitial.nFolders = _pfci->cFolders;
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_twsInitial.ulTotalSize = _pfci->cbSize;
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_twsInitial.ulActualSize = _pfci->cbActualSize;
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}
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HRESULT CFolderSizeTreeWalkerCB::FoundFile(LPCWSTR pwszPath, TREEWALKERSTATS *ptws, WIN32_FIND_DATAW * pwfd)
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{
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if (_pfci->bContinue)
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{
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_pfci->cbSize = _twsInitial.ulTotalSize + ptws->ulTotalSize;
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_pfci->cbActualSize = _twsInitial.ulActualSize + ptws->ulActualSize;
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_pfci->cFiles = _twsInitial.nFiles + ptws->nFiles;
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}
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return _pfci->bContinue ? S_OK : E_FAIL;
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}
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HRESULT CFolderSizeTreeWalkerCB::EnterFolder(LPCWSTR pwszPath, TREEWALKERSTATS *ptws, WIN32_FIND_DATAW * pwfd)
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{
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if (_pfci->bContinue)
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{
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_pfci->cFolders = _twsInitial.nFolders + ptws->nFolders;
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}
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return _pfci->bContinue ? S_OK : E_FAIL;
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}
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//
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// Main function for folder size computation
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//
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STDAPI FolderSize(LPCTSTR pszDir, FOLDERCONTENTSINFO *pfci)
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{
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HRESULT hrInit = SHCoInitialize(); // in case our caller did not do this
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HRESULT hr = E_FAIL;
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CFolderSizeTreeWalkerCB *pfstwcb = new CFolderSizeTreeWalkerCB(pfci);
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if (pfstwcb)
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{
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IShellTreeWalker *pstw;
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hr = CoCreateInstance(CLSID_CShellTreeWalker, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARG(IShellTreeWalker, &pstw));
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if (SUCCEEDED(hr))
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{
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hr = pstw->WalkTree(WT_NOTIFYFOLDERENTER, pszDir, NULL, 0, SAFECAST(pfstwcb, IShellTreeWalkerCallBack *));
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pstw->Release();
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}
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pfstwcb->Release();
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}
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SHCoUninitialize(hrInit);
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return hr;
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}
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