119 lines
3.3 KiB
C++
119 lines
3.3 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 1999 - 1999
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//
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// File: extract.cpp
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//
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//--------------------------------------------------------------------------
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// ExtractIcon.cpp : Implementation of CExtractIcon
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#include "stdafx.h"
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#include "shlobj.h"
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#include "Extract.h"
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#include "xmlfile.h"
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/* 7A80E4A8-8005-11D2-BCF8-00C04F72C717 */
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CLSID CLSID_ExtractIcon = {0x7a80e4a8, 0x8005, 0x11d2, {0xbc, 0xf8, 0x00, 0xc0, 0x4f, 0x72, 0xc7, 0x17} };
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/////////////////////////////////////////////////////////////////////////////
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// CExtractIcon
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STDMETHODIMP
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CExtractIcon::Extract(LPCTSTR pszFile, UINT nIconIndex, HICON *phiconLarge, HICON *phiconSmall, UINT nIconSize)
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{
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HRESULT hr = S_OK;
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int nLargeIconSize = LOWORD(nIconSize);
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int nSmallIconSize = HIWORD(nIconSize);
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// extract from the .msc file ONLY if the file is in local storage, NOT in offline storage.
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DWORD dwFileAttributes = GetFileAttributes(pszFile);
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bool bUseMSCFile = (dwFileAttributes != 0xFFFFFFFF) && !(dwFileAttributes & FILE_ATTRIBUTE_OFFLINE);
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CSmartIcon iconLarge;
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CSmartIcon iconSmall;
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if (bUseMSCFile)
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{
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CPersistableIcon persistableIcon;
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// try to read file as if it was XML document first,
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hr = ExtractIconFromXMLFile (pszFile, persistableIcon);
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// if it fails, assume the file has older MSC format (compound document)
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// and try to read it
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if (FAILED (hr))
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{
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USES_CONVERSION;
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hr = persistableIcon.Load (T2CW (pszFile));
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}
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/*
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* get the large and small icons; if either of these fail,
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* we'll get default icons below
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*/
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if (SUCCEEDED (hr) &&
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SUCCEEDED (hr = persistableIcon.GetIcon (nLargeIconSize, iconLarge)) &&
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SUCCEEDED (hr = persistableIcon.GetIcon (nSmallIconSize, iconSmall)))
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{
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ASSERT ((iconLarge != NULL) && (iconSmall != NULL));
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}
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}
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/*
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* use the default icons if the file is offline, or the Load failed
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*/
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if (!bUseMSCFile || FAILED(hr))
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{
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/*
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* load the large and small icons from our resources
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*/
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iconLarge.Attach ((HICON) LoadImage (_Module.GetModuleInstance(),
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MAKEINTRESOURCE(IDR_MAINFRAME),
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IMAGE_ICON,
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nLargeIconSize,
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nLargeIconSize,
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LR_DEFAULTCOLOR));
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iconSmall.Attach ((HICON) LoadImage (_Module.GetModuleInstance(),
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MAKEINTRESOURCE(IDR_MAINFRAME),
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IMAGE_ICON,
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nSmallIconSize,
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nSmallIconSize,
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LR_DEFAULTCOLOR));
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}
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/*
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* if we successfully got the large and small icons, return them
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* to the shell (which will take responsibility for their destruction)
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*/
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if ((iconLarge != NULL) && (iconSmall != NULL))
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{
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*phiconLarge = iconLarge.Detach();
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*phiconSmall = iconSmall.Detach();
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hr = S_OK;
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}
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else
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hr = E_FAIL;
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return (hr);
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}
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STDMETHODIMP
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CExtractIcon::GetIconLocation(UINT uFlags, LPTSTR szIconFile, UINT cchMax, LPINT piIndex, UINT *pwFlags)
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{
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_tcscpy(szIconFile, (LPCTSTR)m_strIconFile);
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*piIndex = 0;
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*pwFlags = GIL_NOTFILENAME | GIL_PERINSTANCE | GIL_DONTCACHE;
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return NOERROR;
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}
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STDMETHODIMP
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CExtractIcon::Load(LPCOLESTR pszFileName, DWORD dwMode)
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{
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m_strIconFile = pszFileName;
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return S_OK;
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}
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