canvas/inc/propertysethelper.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.
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   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 <canvas/canvastools.hxx>
  23
  24 #include <functional>
  25 #include <vector>
  26 #include <memory>
  27
  28 #include <canvas/canvastoolsdllapi.h>
  29
  30 namespace com::sun::star::beans { class XPropertyChangeListener; }
  31 namespace com::sun::star::beans { class XPropertySetInfo; }
  32 namespace com::sun::star::beans { class XVetoableChangeListener; }
  33
  34 namespace canvas
  35 {
  36     /** Really simplistic XPropertySet helper for properties.
  37
  38         This class provides easy access to properties, referenced via
  39         ASCII strings. The name/property modification callbacks pairs
  40         are passed into this class via a vector. Each time a property
  41         is set or queried, the corresponding getter or setter callback
  42         is called.
  43
  44         Use this class as a delegate for the corresponding
  45         XPropertySet methods, and take care of UNO XInterface and lock
  46         handling by yourself.
  47
  48         The core responsibility of this class is the name/value
  49         mapping for property sets.
  50      */
  51     class CANVASTOOLS_DLLPUBLIC PropertySetHelper
  52     {
  53     public:
  54         typedef std::function<css::uno::Any ()> GetterType;
  55         typedef std::function<void (const css::uno::Any&)> SetterType;
  56         struct Callbacks
  57         {
  58             GetterType getter;
  59             SetterType setter;
  60         };
  61         typedef tools::ValueMap< Callbacks >     MapType;
  62         typedef std::vector< MapType::MapEntry > InputMap;
  63
  64         class MakeMap : public InputMap
  65         {
  66         public:
  67             MakeMap(const char*        name,
  68                     const GetterType&  getter,
  69                     const SetterType&  setter)
  70             {
  71                 MapType::MapEntry aEntry={name, {getter, setter}};
  72                 push_back(aEntry);
  73             }
  74             MakeMap(const char*       name,
  75                     const GetterType& getter)
  76             {
  77                 MapType::MapEntry aEntry={name, {getter, SetterType()}};
  78                 push_back(aEntry);
  79             }
  80             MakeMap& operator()(const char*        name,
  81                                 const GetterType&  getter,
  82                                 const SetterType&  setter)
  83             {
  84                 MapType::MapEntry aEntry={name, {getter, setter}};
  85                 push_back(aEntry);
  86                 return *this;
  87             }
  88             MakeMap& operator()(const char*       name,
  89                                 const GetterType& getter)
  90             {
  91                 MapType::MapEntry aEntry={name, {getter, SetterType()}};
  92                 push_back(aEntry);
  93                 return *this;
  94             }
  95         };
  96
  97         /** Create helper with zero properties
  98          */
  99         PropertySetHelper();
 100
 101         /** Init helper with new name/value map
 102
 103             @param rMap
 104             Vector of name/function pointers. Each name is offered as
 105             a property, and reading/writing to this property is passed
 106             on to the given function pointer.
 107          */
 108         void initProperties( const InputMap& rMap );
 109
 110         /** Add given properties to helper
 111
 112             @param rMap
 113             Vector of name/function pointers. Each name is offered as
 114             a property, and reading/writing to this property is passed
 115             on to the given function pointer. These name/function
 116             pairs are added to the already existing ones.
 117          */
 118         void addProperties( const InputMap& rMap );
 119
 120         /** Checks whether the given string corresponds to a valid
 121             property name.
 122
 123             @return true, if the given name maps to a known property.
 124          */
 125         bool isPropertyName( const OUString& aPropertyName ) const;
 126
 127         // XPropertySet implementation
 128         css::uno::Reference< css::beans::XPropertySetInfo > getPropertySetInfo() const;
 129         void setPropertyValue( const OUString&      aPropertyName,
 130                                const css::uno::Any& aValue );
 131         css::uno::Any getPropertyValue( const OUString& PropertyName ) const;
 132         void addPropertyChangeListener( const OUString& aPropertyName,
 133                                         const css::uno::Reference< css::beans::XPropertyChangeListener >& xListener );
 134         void addVetoableChangeListener( const OUString& aPropertyName,
 135                                         const css::uno::Reference< css::beans::XVetoableChangeListener >& xListener );
 136
 137     private:
 138         std::unique_ptr<MapType> mpMap;
 139         InputMap                maMapEntries;
 140     };
 141 }
 142
 143 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */