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Diffstat (limited to 'fpicker/source/win32/comptr.hxx')
| -rw-r--r-- | fpicker/source/win32/comptr.hxx | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/fpicker/source/win32/comptr.hxx b/fpicker/source/win32/comptr.hxx new file mode 100644 index 000000000000..2469d8b5e289 --- /dev/null +++ b/fpicker/source/win32/comptr.hxx @@ -0,0 +1,212 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef INCLUDED_FPICKER_SOURCE_WIN32_FILEPICKER_COMPTR_HXX +#define INCLUDED_FPICKER_SOURCE_WIN32_FILEPICKER_COMPTR_HXX + +#include <sal/types.h> +#include <osl/diagnose.h> +#include <shobjidl.h> + +template< class T_INTERFACE , + REFIID P_IID = IID_NULL , + REFCLSID P_CLSID = CLSID_NULL > +class ComPtr +{ + public: + + + /** initialize com ptr with null. + */ + ComPtr() + { + m_pInterface = nullptr; + } + + + /** initialize com ptr with given interface. + */ + explicit ComPtr(T_INTERFACE* pInterface) + { + m_pInterface = pInterface; + if (m_pInterface) + m_pInterface->AddRef(); + } + + + /** copy ctor. + */ + ComPtr(const ComPtr< T_INTERFACE, P_IID, P_CLSID >& aCopy) + { + m_pInterface = aCopy.m_pInterface; + if (m_pInterface) + m_pInterface->AddRef(); + } + + + /** initialize object by querying external object for the right interface. + */ + explicit ComPtr(IUnknown* pIUnknown) + { + if (pIUnknown) + pIUnknown->QueryInterface(P_IID, (void**)&m_pInterface); + } + + + /** deinitialize com object right. + */ + ~ComPtr() + { + release(); + } + + public: + + + HRESULT create() + { + return CoCreateInstance(P_CLSID, nullptr, CLSCTX_ALL, P_IID, reinterpret_cast<void**>(&m_pInterface)); + } + + + operator T_INTERFACE*() const + { + return m_pInterface; + } + + + T_INTERFACE& operator*() const + { + return *m_pInterface; + } + + + T_INTERFACE** operator&() + { + return &m_pInterface; + } + + + T_INTERFACE* operator->() const + { + return m_pInterface; + } + + + T_INTERFACE* operator=(T_INTERFACE* pInterface) + { + if ( equals(pInterface) ) + return m_pInterface; + + m_pInterface->Release(); + m_pInterface = pInterface; + if (m_pInterface) + m_pInterface->AddRef(); + + return m_pInterface; + } + + + T_INTERFACE* operator=(IUnknown* pIUnknown) + { + if (pIUnknown) + pIUnknown->QueryInterface(P_IID, (void**)&m_pInterface); + return m_pInterface; + } + + + T_INTERFACE* operator=(const ComPtr< T_INTERFACE, P_IID, P_CLSID >& aCopy) + { + m_pInterface = aCopy.m_pInterface; + if (m_pInterface) + m_pInterface->AddRef(); + + return m_pInterface; + } + + + T_INTERFACE* get() const + { + return m_pInterface; + } + + + void attach(T_INTERFACE* pInterface) + { + if (pInterface) + { + m_pInterface->Release(); + m_pInterface = pInterface; + } + } + + + T_INTERFACE* detach() + { + T_INTERFACE* pInterface = m_pInterface; + m_pInterface = NULL; + return pInterface; + } + + + void release() + { + if (m_pInterface) + { + m_pInterface->Release(); + m_pInterface = nullptr; + } + } + + template< class T_QUERYINTERFACE > + HRESULT query(T_QUERYINTERFACE** pQuery) + { + return m_pInterface->QueryInterface(__uuidof(T_QUERYINTERFACE), reinterpret_cast<void**>(pQuery)); + } + + bool equals(IUnknown* pCheck) + { + if ( + ( ! m_pInterface ) && + ( ! pCheck ) + ) + return sal_True; + + IUnknown* pCurrent = NULL; + m_pInterface->QueryInterface(IID_IUnknown, (void**)&pCurrent); + + sal_Bool bEquals = (pCheck == pCurrent); + pCurrent->Release(); + + return bEquals; + } + + + bool is() + { + return (m_pInterface != nullptr); + } + + private: + T_INTERFACE* m_pInterface; +}; + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |