471 lines
16 KiB
C++
471 lines
16 KiB
C++
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#include "shellprv.h"
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#include "ids.h"
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class CFolderInfoTip : public IQueryInfo, public ICustomizeInfoTip, public IParentAndItem, public IShellTreeWalkerCallBack
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{
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public:
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CFolderInfoTip(IUnknown *punk, LPCTSTR pszFolder);
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// IUnknown
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STDMETHODIMP QueryInterface(REFIID, void **);
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STDMETHODIMP_(ULONG) AddRef(void);
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STDMETHODIMP_(ULONG) Release(void);
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// IQueryInfo methods.
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STDMETHODIMP GetInfoTip(DWORD dwFlags, WCHAR** ppwszTip);
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STDMETHODIMP GetInfoFlags(DWORD *pdwFlags);
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// ICustomizeInfoTip
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STDMETHODIMP SetPrefixText(LPCWSTR pszPrefix);
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STDMETHODIMP SetExtraProperties(const SHCOLUMNID *pscid, UINT cscid);
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// IParentAndItem
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STDMETHODIMP SetParentAndItem(LPCITEMIDLIST pidlParent, IShellFolder *psf, LPCITEMIDLIST pidlChild);
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STDMETHODIMP GetParentAndItem(LPITEMIDLIST *ppidlParent, IShellFolder **ppsf, LPITEMIDLIST *ppidlChild);
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// IShellTreeWalkerCallBack methods
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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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STDMETHODIMP LeaveFolder(LPCWSTR pwszPath, TREEWALKERSTATS *ptws);
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STDMETHODIMP HandleError(LPCWSTR pwszPath, TREEWALKERSTATS *ptws, HRESULT hrError);
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private:
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~CFolderInfoTip();
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HRESULT _GetTreeWalkerData(TREEWALKERSTATS *ptws);
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HRESULT _BufferInsert(LPWSTR pszBuffer, int *puBufferUsed, int uBufferMaxSize, LPCWSTR pwszPath, int cBufferItems);
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HRESULT _WalkTree(LPWSTR pszTip, DWORD cchSize);
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HRESULT _BuildSizeBlurb(HRESULT hr, LPWSTR pszSizeBlurb, DWORD cchSize);
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HRESULT _BuildFolderBlurb(HRESULT hr, LPWSTR pszFolderBlurb, DWORD cchSize);
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HRESULT _BuildFileBlurb(HRESULT hr, LPWSTR pszSizeBlurb, DWORD cchSize);
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LONG _cRef; // Reference Counter
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LPWSTR _pszFolderName; // File name of the target folder
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IQueryInfo *_pqiOuter; // Outer info tip for folders (say, for comments)
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ULONGLONG _ulTotalSize; // Total size of encountered files
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UINT _nSubFolders; // Total number of subfolders of target
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UINT _nFiles; // Total number of subfiles of target folder
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DWORD _dwSearchStartTime; // Time when search started
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WCHAR _szFileList[60]; // List of files in target folder
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int _nFileListCharsUsed; // Number of characters used in buffer
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WCHAR _szFolderList[60]; // List of subfolders of target
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int _nFolderListCharsUsed; // Number of chars used in folder buffer
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};
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// Constructor and Destructor do nothing more than set everything to
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// 0 and ping the dll
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CFolderInfoTip::CFolderInfoTip(IUnknown *punkOutter, LPCTSTR pszFolder) : _cRef(1)
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{
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// Init everything to 0
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_pszFolderName = StrDup(pszFolder);
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_szFileList[0] = 0;
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_nFileListCharsUsed = 0;
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_szFolderList[0] = 0;
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_nFolderListCharsUsed = 0;
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_ulTotalSize = 0;
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_nSubFolders = 0;
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_nFiles = 0;
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punkOutter->QueryInterface(IID_PPV_ARG(IQueryInfo, &_pqiOuter));
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DllAddRef();
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}
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CFolderInfoTip::~CFolderInfoTip()
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{
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LocalFree(_pszFolderName);
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if (_pqiOuter)
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_pqiOuter->Release();
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DllRelease();
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}
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HRESULT CFolderInfoTip::QueryInterface(REFIID riid, void **ppv)
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{
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static const QITAB qit[] = {
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QITABENT(CFolderInfoTip, IQueryInfo),
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QITABENT(CFolderInfoTip, ICustomizeInfoTip),
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QITABENT(CFolderInfoTip, IParentAndItem),
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QITABENT(CFolderInfoTip, 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 CFolderInfoTip::AddRef()
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{
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return InterlockedIncrement(&_cRef);
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}
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ULONG CFolderInfoTip::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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// IQueryInfo functions
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STDMETHODIMP CFolderInfoTip::GetInfoFlags(DWORD *pdwFlags)
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{
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*pdwFlags = 0;
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return S_OK;
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}
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//
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// Wrapper for FormatMessage. Is this duplicated somewhere else?
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DWORD _FormatMessageArg(DWORD dwFlags, LPCVOID lpSource, DWORD dwMessageID, DWORD dwLangID, LPWSTR pszBuffer, DWORD cchSize, ...)
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{
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va_list vaParamList;
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va_start(vaParamList, cchSize);
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DWORD dwResult = FormatMessage(dwFlags, lpSource, dwMessageID, dwLangID, pszBuffer, cchSize, &vaParamList);
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va_end(vaParamList);
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return dwResult;
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}
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// This runs a TreeWalker that gets the info about files and file
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// sizes, etc. and then takes those date and stuffs them into a infotip
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STDMETHODIMP CFolderInfoTip::GetInfoTip(DWORD dwFlags, LPWSTR *ppwszTip)
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{
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HRESULT hr = S_OK;
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*ppwszTip = NULL;
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if (_pszFolderName)
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{
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TCHAR szTip[INFOTIPSIZE]; // The info tip I build w/ folder contents
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szTip[0] = 0;
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// If we are to search, then search!
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if ((dwFlags & QITIPF_USESLOWTIP) &&
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SHRegGetBoolUSValue(REGSTR_EXPLORER_ADVANCED, TEXT("FolderContentsInfoTip"), 0, TRUE))
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{
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_WalkTree(szTip, ARRAYSIZE(szTip));
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}
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// Now that we've built or skipped our tip, get the outer tip's info.
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if (_pqiOuter)
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{
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if (szTip[0])
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{
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LPWSTR pszOuterTip = NULL;
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_pqiOuter->GetInfoTip(dwFlags, &pszOuterTip);
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// Allocate and build the return tip, ommitting the outer tip if
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// it's null, and putting a \n between them
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// if they both aren't.
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int cch = lstrlen(szTip) + (pszOuterTip ? lstrlen(pszOuterTip) + 1 : 0) + 1;
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*ppwszTip = (LPWSTR)CoTaskMemAlloc(cch * sizeof(szTip[0]));
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if (*ppwszTip)
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{
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**ppwszTip = 0; // zero init string
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if (pszOuterTip)
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{
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if (*pszOuterTip)
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{
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// outer tip first
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StrCpyN(*ppwszTip, pszOuterTip, cch);
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StrCatBuff(*ppwszTip, L"\n", cch);
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}
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SHFree(pszOuterTip);
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}
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StrCatBuff(*ppwszTip, szTip, cch);
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}
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}
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else
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{
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hr = _pqiOuter->GetInfoTip(dwFlags, ppwszTip);
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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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STDMETHODIMP CFolderInfoTip::SetPrefixText(LPCWSTR pszPrefix)
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{
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ICustomizeInfoTip *pcit;
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if (_pqiOuter && SUCCEEDED(_pqiOuter->QueryInterface(IID_PPV_ARG(ICustomizeInfoTip, &pcit))))
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{
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pcit->SetPrefixText(pszPrefix);
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pcit->Release();
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}
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return S_OK;
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}
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STDMETHODIMP CFolderInfoTip::SetExtraProperties(const SHCOLUMNID *pscid, UINT cscid)
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{
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ICustomizeInfoTip *pcit;
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if (_pqiOuter && SUCCEEDED(_pqiOuter->QueryInterface(IID_PPV_ARG(ICustomizeInfoTip, &pcit))))
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{
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pcit->SetExtraProperties(pscid, cscid);
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pcit->Release();
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}
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return S_OK;
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}
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// IParentAndItem
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STDMETHODIMP CFolderInfoTip::SetParentAndItem(LPCITEMIDLIST pidlParent, IShellFolder *psf, LPCITEMIDLIST pidl)
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{
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IParentAndItem *ppai;
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if (_pqiOuter && SUCCEEDED(_pqiOuter->QueryInterface(IID_PPV_ARG(IParentAndItem, &ppai))))
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{
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ppai->SetParentAndItem(pidlParent, psf, pidl);
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ppai->Release();
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}
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return S_OK;
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}
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STDMETHODIMP CFolderInfoTip::GetParentAndItem(LPITEMIDLIST *ppidlParent, IShellFolder **ppsf, LPITEMIDLIST *ppidl)
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{
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IParentAndItem *ppai;
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if (_pqiOuter && SUCCEEDED(_pqiOuter->QueryInterface(IID_PPV_ARG(IParentAndItem, &ppai))))
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{
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ppai->GetParentAndItem(ppidlParent, ppsf, ppidl);
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ppai->Release();
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}
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return S_OK;
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}
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// Helper functions for GetInfoTip
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HRESULT CFolderInfoTip::_WalkTree(LPWSTR pszTip, DWORD cchSize)
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{
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// Get a CShellTreeWalker object to run the search for us.
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IShellTreeWalker *pstw;
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HRESULT 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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TCHAR szFolderBlurb[128], szFileBlurb[128], szSizeBlurb[128];
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// Remember when we started so we know when to stop
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_dwSearchStartTime = GetTickCount();
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// Now, if hrTreeWalk is an error, it's not really an error; it just means
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// that the search was cut off early, so we don't bother to check
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// it. hrTreeWalk is passed to _BuildSizeBlurb so that it know whether or not
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// to add "greater than" to the string.
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HRESULT hrTreeWalk = pstw->WalkTree(WT_EXCLUDEWALKROOT | WT_NOTIFYFOLDERENTER,
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_pszFolderName, L"*.*", 32, SAFECAST(this, IShellTreeWalkerCallBack *));
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// Create substrings for size, files, folders (may be empty if there's
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// nothing to show)
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_BuildSizeBlurb(hrTreeWalk, szSizeBlurb, ARRAYSIZE(szSizeBlurb));
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_BuildFileBlurb(hrTreeWalk, szFileBlurb, ARRAYSIZE(szFileBlurb));
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_BuildFolderBlurb(hrTreeWalk, szFolderBlurb, ARRAYSIZE(szFolderBlurb));
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// Build our local tip
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TCHAR szFormatStr[64];
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LoadString(HINST_THISDLL, IDS_FIT_TipFormat, szFormatStr, ARRAYSIZE(szFormatStr));
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_FormatMessageArg(FORMAT_MESSAGE_FROM_STRING, szFormatStr, 0, 0, pszTip,
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cchSize, szSizeBlurb, szFolderBlurb, szFileBlurb);
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pstw->Release();
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}
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return hr;
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}
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HRESULT CFolderInfoTip::_BuildSizeBlurb(HRESULT hr, LPWSTR pszBlurb, DWORD cchSize)
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{
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if (_ulTotalSize || (_nFiles || _nSubFolders))
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{
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WCHAR szSizeString[20];
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WCHAR szFormatStr[64];
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StrFormatByteSize(_ulTotalSize, szSizeString, ARRAYSIZE(szSizeString));
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if (SUCCEEDED(hr))
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{
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LoadString(HINST_THISDLL, IDS_FIT_Size, szFormatStr, ARRAYSIZE(szFormatStr));
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}
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else
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{
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LoadString(HINST_THISDLL, IDS_FIT_Size_LT, szFormatStr, ARRAYSIZE(szFormatStr));
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}
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_FormatMessageArg(FORMAT_MESSAGE_FROM_STRING, szFormatStr, 0, 0, pszBlurb, cchSize, szSizeString);
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}
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else
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{
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LoadString(HINST_THISDLL, IDS_FIT_Size_Empty, pszBlurb, cchSize);
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}
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return S_OK;
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}
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HRESULT CFolderInfoTip::_BuildFileBlurb(HRESULT hr, LPWSTR pszBlurb, DWORD cchSize)
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{
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if (_nFiles && _nFileListCharsUsed)
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{
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WCHAR szFormatStr[64];
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LoadString(HINST_THISDLL, IDS_FIT_Files, szFormatStr, ARRAYSIZE(szFormatStr));
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_FormatMessageArg(FORMAT_MESSAGE_FROM_STRING, szFormatStr, 0, 0, pszBlurb, cchSize, _szFileList);
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}
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else
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{
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_FormatMessageArg(FORMAT_MESSAGE_FROM_STRING, L"", 0, 0, pszBlurb, cchSize);
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}
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return S_OK;
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}
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HRESULT CFolderInfoTip::_BuildFolderBlurb(HRESULT hr, LPWSTR pszBlurb, DWORD cchSize)
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{
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if (_nSubFolders)
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{
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WCHAR szFormatStr[64];
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LoadString(HINST_THISDLL, IDS_FIT_Folders, szFormatStr, ARRAYSIZE(szFormatStr));
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_FormatMessageArg(FORMAT_MESSAGE_FROM_STRING, szFormatStr, 0, 0, pszBlurb, cchSize, _szFolderList);
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}
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else
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{
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_FormatMessageArg(FORMAT_MESSAGE_FROM_STRING, L"", 0, 0, pszBlurb, cchSize);
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}
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return S_OK;
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}
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//
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// A helper func that copies strings into a fixed size buffer,
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// taking care of delimeters and everything. Used by EnterFolder
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// and FoundFile to build the file and folder lists.
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HRESULT CFolderInfoTip::_BufferInsert(LPWSTR pszBuffer, int *pnBufferUsed,
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int nBufferMaxSize, LPCWSTR pszPath, int nBufferItems)
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{
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TCHAR szDelimeter[100], szExtraItems[100];
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LoadString(HINST_THISDLL, IDS_FIT_Delimeter, szDelimeter, ARRAYSIZE(szDelimeter));
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LoadString(HINST_THISDLL, IDS_FIT_ExtraItems, szExtraItems, ARRAYSIZE(szExtraItems));
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// Check to see if the buffer is full, if not, proceed.
|
||
|
|
if (*pnBufferUsed != nBufferMaxSize)
|
||
|
|
{
|
||
|
|
// Holds the file name form the abs. path
|
||
|
|
// Grab the file name
|
||
|
|
LPWSTR pszFile = PathFindFileName(pszPath);
|
||
|
|
if (pszFile)
|
||
|
|
{
|
||
|
|
// Calculates if the item will fit, remembering to leave room
|
||
|
|
// not noly for the delimeter, but for for the extra item marker
|
||
|
|
// that might be added in the future.
|
||
|
|
if (*pnBufferUsed + lstrlen(pszFile) + lstrlen(szDelimeter) * 2 + lstrlen(szExtraItems) + 1 <
|
||
|
|
nBufferMaxSize)
|
||
|
|
{
|
||
|
|
// Add the delimeter if this is not the 1st item
|
||
|
|
if (nBufferItems > 1)
|
||
|
|
{
|
||
|
|
StrCpyN(&(pszBuffer[*pnBufferUsed]),
|
||
|
|
szDelimeter, (nBufferMaxSize - *pnBufferUsed));
|
||
|
|
*pnBufferUsed += lstrlen(szDelimeter);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Add the item to the buffer
|
||
|
|
StrCpyN(&(pszBuffer[*pnBufferUsed]), pszFile, (nBufferMaxSize - *pnBufferUsed));
|
||
|
|
*pnBufferUsed += lstrlen(pszFile);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// In this case, the item won't fit, so just add the extra
|
||
|
|
// items marker and set the buffer to be full
|
||
|
|
if (nBufferItems > 1)
|
||
|
|
{
|
||
|
|
StrCpyN(&(pszBuffer[*pnBufferUsed]), szDelimeter, (nBufferMaxSize - *pnBufferUsed));
|
||
|
|
*pnBufferUsed += lstrlen(szDelimeter);
|
||
|
|
}
|
||
|
|
|
||
|
|
StrCpyN(&(pszBuffer[*pnBufferUsed]), szExtraItems, (nBufferMaxSize - *pnBufferUsed));
|
||
|
|
*pnBufferUsed = nBufferMaxSize;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// IShellTreeWalkerCallBack functions
|
||
|
|
//
|
||
|
|
// The TreeWalker calls these whenever it finds a file, etc. We grab
|
||
|
|
// the data out of the passed TREEWALKERSTATS *and use it to build the
|
||
|
|
// tip. We also take the filenames that are passed to FoundFile and to
|
||
|
|
// to EnterFolder to build the file and folder listings
|
||
|
|
STDMETHODIMP CFolderInfoTip::FoundFile(LPCWSTR pwszPath, TREEWALKERSTATS *ptws, WIN32_FIND_DATAW * pwfd)
|
||
|
|
{
|
||
|
|
if (ptws->nDepth == 0)
|
||
|
|
{
|
||
|
|
if (!(pwfd->dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
|
||
|
|
_BufferInsert(_szFileList, &_nFileListCharsUsed, ARRAYSIZE(_szFileList), pwszPath, ptws->nFiles);
|
||
|
|
}
|
||
|
|
|
||
|
|
return _GetTreeWalkerData(ptws);
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CFolderInfoTip::EnterFolder(LPCWSTR pwszPath, TREEWALKERSTATS *ptws, WIN32_FIND_DATAW * pwfd)
|
||
|
|
{
|
||
|
|
if (ptws->nDepth == 0)
|
||
|
|
{
|
||
|
|
if (!(pwfd->dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
|
||
|
|
_BufferInsert(_szFolderList, &_nFolderListCharsUsed, ARRAYSIZE(_szFolderList), pwszPath, ptws->nFolders);
|
||
|
|
}
|
||
|
|
|
||
|
|
return _GetTreeWalkerData(ptws);
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CFolderInfoTip::LeaveFolder(LPCWSTR pwszPath, TREEWALKERSTATS *ptws)
|
||
|
|
{
|
||
|
|
return _GetTreeWalkerData(ptws);
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CFolderInfoTip::HandleError(LPCWSTR pwszPath, TREEWALKERSTATS *ptws, HRESULT hrError)
|
||
|
|
{
|
||
|
|
// TODO: look for HRESULT_FROM_WIN32(ACCESS_DENIED) for folders we can't look into.
|
||
|
|
return _GetTreeWalkerData(ptws);
|
||
|
|
}
|
||
|
|
|
||
|
|
// copies data from the treewalker callback into
|
||
|
|
// class vars so that they can be used to build the InfoTip. This also cuts
|
||
|
|
// off the search if too much time has elapsed.
|
||
|
|
HRESULT CFolderInfoTip::_GetTreeWalkerData(TREEWALKERSTATS *ptws)
|
||
|
|
{
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
|
||
|
|
_ulTotalSize = ptws->ulTotalSize;
|
||
|
|
_nSubFolders = ptws->nFolders;
|
||
|
|
_nFiles = ptws->nFiles;
|
||
|
|
|
||
|
|
if ((GetTickCount() - _dwSearchStartTime) > 3000) // 3 seconds
|
||
|
|
{
|
||
|
|
hr = E_UNEXPECTED;
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDAPI CFolderInfoTip_CreateInstance(IUnknown *punkOuter, LPCTSTR pszFolder, REFIID riid, void **ppv)
|
||
|
|
{
|
||
|
|
HRESULT hr;
|
||
|
|
CFolderInfoTip *pdocp = new CFolderInfoTip(punkOuter, pszFolder);
|
||
|
|
if (pdocp)
|
||
|
|
{
|
||
|
|
hr = pdocp->QueryInterface(riid, ppv);
|
||
|
|
pdocp->Release();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
*ppv = NULL;
|
||
|
|
hr = E_OUTOFMEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|