fpicker/source/win32/FilterContainer.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #pragma once
  21
  22 #include <sal/types.h>
  23 #include <rtl/ustring.hxx>
  24
  25 #include <vector>
  26
  27
  28 // helper class, only usable by OFilterContainer
  29
  30
  31 class CFilterContainer
  32 {
  33 public:
  34     // defines a filter entry which is made of a name and a filter value
  35     // e.g. 'Text *.txt'
  36     typedef std::pair< OUString, OUString > FILTER_ENTRY_T;
  37
  38 public:
  39     explicit CFilterContainer( sal_Int32 initSize = 0 );
  40
  41     // add a new filter
  42     // returns true if the filter was successfully added
  43     // returns false if duplicates are not allowed and
  44     // the filter is already in the container
  45     bool addFilter(
  46         const OUString& aName,
  47         const OUString& aFilter,
  48         bool bAllowDuplicates = false );
  49
  50     // delete the specified filter returns true on
  51     // success and false if the filter was not found
  52     bool delFilter( const OUString& aName );
  53
  54     // the number of filter already added
  55     sal_Int32 numFilter( );
  56
  57     // clear all entries
  58     void empty( );
  59
  60     // retrieve a filter from the container. These methods
  61     // return true on success and false if the specified
  62     // filter was not found
  63     bool getFilterByName(const OUString& aName, OUString& theFilter) const;
  64     bool getFilterByIndex(sal_Int32 aIndex, OUString& theFilter) const;
  65     bool getFilterNameByIndex(sal_Int32 aIndex, OUString& theName) const;
  66
  67     // returns the position of the specified filter or -1
  68     // if the filter was not found
  69     sal_Int32 getFilterPos( const OUString& aName ) const;
  70
  71     // starts enumerating the filter in the container
  72     void beginEnumFilter( );
  73
  74     // returns true if another filter has been retrieved
  75     bool getNextFilter( FILTER_ENTRY_T& nextFilterEntry );
  76
  77     // cache current filter
  78     void setCurrentFilter( const OUString& aName );
  79
  80     // returns cached current filter
  81     OUString getCurrentFilter() const;
  82
  83 protected:
  84     typedef std::vector< FILTER_ENTRY_T > FILTER_VECTOR_T;
  85
  86 private:
  87     // prevent copy and assignment
  88     CFilterContainer( const CFilterContainer& );
  89     CFilterContainer& SAL_CALL operator=( const CFilterContainer& );
  90
  91     sal_Int32 getFilterTagPos( const OUString& aName ) const;
  92
  93 private:
  94     FILTER_VECTOR_T                 m_vFilters;
  95     FILTER_VECTOR_T::const_iterator m_iter;
  96     bool                            m_bIterInitialized;
  97     OUString                 m_sCurrentFilter;
  98 };
  99
 100
 101 // a helper function to create a filter buffer in the format
 102 // the Win32 API requires, e.g. "Text\0*.txt\0Doc\0*.doc;*xls\0\0"
 103
 104
 105 OUString makeWinFilterBuffer( CFilterContainer& aFilterContainer );
 106
 107 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */