kworship/css/KwCssStyle.h

   1 /***************************************************************************
   2  *   This file is part of KWorship.                                        *
   3  *   Copyright 2008 James Hogan <james@albanarts.com>                      *
   4  *                                                                         *
   5  *   KWorship is free software: you can redistribute it and/or modify      *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation, either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   KWorship is distributed in the hope that it will be useful,           *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with KWorship.  If not, write to the Free Software Foundation,  *
  17  *   Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.   *
  18  ***************************************************************************/
  19
  20 #ifndef _KwCssStyle_h_
  21 #define _KwCssStyle_h_
  22
  23 /**
  24  * @file KwCssStyle.h
  25  * @brief Typed cascading style property.
  26  * @author James Hogan <james@albanarts.com>
  27  */
  28
  29 #include "KwCssAbstractStyle.h"
  30 #include "KwCssUnprocessed.h"
  31
  32 /// Stringify a type.
  33 template <typename T>
  34 KwCssUnprocessed KwCssStringify(const T& value);
  35
  36 /// Unstringify a type.
  37 template <typename T>
  38 T KwCssUnstringify(const KwCssUnprocessed& value, bool* success);
  39
  40 /// Typed cascading style property.
  41 /**
  42  * @param T The type of the property.
  43  */
  44 template <typename T>
  45 class KwCssStyle : public KwCssAbstractStyle
  46 {
  47   public:
  48
  49     /*
  50      * Types
  51      */
  52
  53     /// Operation types.
  54     enum Operation
  55     {
  56       none,
  57       override,
  58       revert,
  59       clear
  60     };
  61
  62     /*
  63      * Constructors + destructors
  64      */
  65
  66     /// Default constructor.
  67     KwCssStyle()
  68     : KwCssAbstractStyle()
  69     , m_operation(none)
  70     , m_value()
  71     {
  72     }
  73
  74     /// Copy constructor.
  75     KwCssStyle(const KwCssStyle& copy)
  76     : KwCssAbstractStyle(copy)
  77     , m_operation(copy.m_operation)
  78     , m_value(copy.m_value)
  79     {
  80     }
  81
  82     /// Primary constructor.
  83     KwCssStyle(const T& value, Operation op = override)
  84     : KwCssAbstractStyle()
  85     , m_operation(op)
  86     , m_value(value)
  87     {
  88     }
  89
  90     /// Primary constructor.
  91     KwCssStyle(Operation op)
  92     : KwCssAbstractStyle()
  93     , m_operation(op)
  94     , m_value()
  95     {
  96     }
  97
  98     /// Destructor.
  99     virtual ~KwCssStyle()
 100     {
 101     }
 102
 103     /*
 104      * Main interface
 105      */
 106
 107     // Reimplemented
 108     virtual KwCssAbstractStyleState* getNewState() const;
 109
 110     // Reimplemented
 111     virtual KwCssAbstractStyle* duplicate() const
 112     {
 113       return new KwCssStyle<T>(*this);
 114     }
 115
 116     // Reimplemented
 117     virtual QString toString() const
 118     {
 119       switch (m_operation)
 120       {
 121         case revert:
 122           {
 123             return "revert";
 124           }
 125
 126         case override:
 127           {
 128             return KwCssStringify(m_value);
 129           }
 130
 131         case clear:
 132           {
 133             return "clear";
 134           }
 135
 136         case none:
 137         default:
 138           {
 139             return "inherit";
 140           }
 141
 142       }
 143     }
 144
 145     /*
 146      * Accessors
 147      */
 148
 149     /// Get the operation type.
 150     Operation getOperation() const
 151     {
 152       return m_operation;
 153     }
 154
 155     /// Get the value.
 156     T getValue() const
 157     {
 158       return m_value;
 159     }
 160
 161   private:
 162
 163     /*
 164      * Variables
 165      */
 166
 167     /// Type of operation.
 168     Operation m_operation;
 169
 170     /// Initial or overrided value.
 171     T m_value;
 172 };
 173
 174 #include "KwCssStyleState.h"
 175
 176 /// Get a new state.
 177 template <typename T>
 178 KwCssAbstractStyleState* KwCssStyle<T>::getNewState() const
 179 {
 180   return new KwCssStyleState<T>();
 181 }
 182
 183 #endif // _KwCssStyle_h_
 184