1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 #ifndef _MTAOLECLIPB_HXX_ 25 #define _MTAOLECLIPB_HXX_ 26 27 #include <sal/types.h> 28 #include <osl/mutex.hxx> 29 30 #if defined _MSC_VER 31 #pragma warning(push,1) 32 #endif 33 #include <objidl.h> 34 #if defined _MSC_VER 35 #pragma warning(pop) 36 #endif 37 38 //-------------------------------------------------------- 39 // the Mta-Ole clipboard class is for internal use only! 40 // only one instance of this class should be created, the 41 // user has to ensure this! 42 // the class is not thread-safe because it will be used 43 // only from within the clipboard service and the methods 44 // of the clipboard service are already synchronized 45 //-------------------------------------------------------- 46 47 class CMtaOleClipboard 48 { 49 public: 50 typedef void ( WINAPI *LPFNC_CLIPVIEWER_CALLBACK_t )( void ); 51 52 public: 53 CMtaOleClipboard( ); 54 ~CMtaOleClipboard( ); 55 56 // clipboard functions 57 HRESULT setClipboard( IDataObject* pIDataObject ); 58 HRESULT getClipboard( IDataObject** ppIDataObject ); 59 HRESULT flushClipboard( ); 60 61 // register/unregister a clipboard viewer; there can only 62 // be one at a time; parameter NULL means unregister 63 // a clipboard viewer 64 // returns true on success else false; use GetLastError( ) in 65 // false case 66 sal_Bool registerClipViewer( LPFNC_CLIPVIEWER_CALLBACK_t pfncClipViewerCallback ); 67 68 private: 69 unsigned int run( ); 70 71 // create a hidden windows which serves as an request 72 // target; so we guarantee synchronization 73 void createMtaOleReqWnd( ); 74 75 // message support 76 sal_Bool postMessage( UINT msg, WPARAM wParam = 0, LPARAM lParam = 0 ); 77 LRESULT sendMessage( UINT msg, WPARAM wParam = 0, LPARAM lParam = 0 ); 78 79 //--------------------------------------------------------------- 80 // message handler functions; remember these functions are called 81 // from a different thread context! 82 //--------------------------------------------------------------- 83 84 HRESULT onSetClipboard( IDataObject* pIDataObject ); 85 HRESULT onGetClipboard( LPSTREAM* ppStream ); 86 HRESULT onFlushClipboard( ); 87 sal_Bool onRegisterClipViewer( LPFNC_CLIPVIEWER_CALLBACK_t pfncClipViewerCallback ); 88 89 // win32 clipboard-viewer support 90 LRESULT onChangeCBChain( HWND hWndRemove, HWND hWndNext ); 91 LRESULT onDrawClipboard( ); 92 93 static LRESULT CALLBACK mtaOleReqWndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam ); 94 static unsigned int WINAPI oleThreadProc( LPVOID pParam ); 95 96 static unsigned int WINAPI clipboardChangedNotifierThreadProc( LPVOID pParam ); 97 98 sal_Bool WaitForThreadReady( ) const; 99 100 private: 101 HANDLE m_hOleThread; 102 unsigned m_uOleThreadId; 103 HANDLE m_hEvtThrdReady; 104 HWND m_hwndMtaOleReqWnd; 105 ATOM m_MtaOleReqWndClassAtom; 106 HWND m_hwndNextClipViewer; 107 LPFNC_CLIPVIEWER_CALLBACK_t m_pfncClipViewerCallback; 108 sal_Bool m_bInRegisterClipViewer; 109 110 sal_Bool m_bRunClipboardNotifierThread; 111 HANDLE m_hClipboardChangedNotifierThread; 112 HANDLE m_hClipboardChangedNotifierEvents[2]; 113 HANDLE& m_hClipboardChangedEvent; 114 HANDLE& m_hTerminateClipboardChangedNotifierEvent; 115 osl::Mutex m_ClipboardChangedEventCountMutex; 116 sal_Int32 m_ClipboardChangedEventCount; 117 118 osl::Mutex m_pfncClipViewerCallbackMutex; 119 120 static CMtaOleClipboard* s_theMtaOleClipboardInst; 121 122 // not allowed 123 private: 124 CMtaOleClipboard( const CMtaOleClipboard& ); 125 CMtaOleClipboard& operator=( const CMtaOleClipboard& ); 126 127 friend LRESULT CALLBACK mtaOleReqWndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam ); 128 }; 129 130 #endif 131