dali/internal/text/text-abstraction/bidirectional-support-impl.h

   1 #ifndef DALI_INTERNAL_TEXT_ABSTRACTION_BIDIRECTIONAL_SUPPORT_IMPL_H
   2 #define DALI_INTERNAL_TEXT_ABSTRACTION_BIDIRECTIONAL_SUPPORT_IMPL_H
   3
   4 /*
   5  * Copyright (c) 2021 Samsung Electronics Co., Ltd.
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * 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, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  */
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/public-api/common/dali-vector.h>
  23 #include <dali/public-api/object/base-object.h>
  24
  25 // INTERNAL INCLUDES
  26 #include <dali/devel-api/text-abstraction/bidirectional-support.h>
  27
  28 namespace Dali
  29 {
  30 namespace TextAbstraction
  31 {
  32 namespace Internal
  33 {
  34 /**
  35  * Implementation of the BidirectionalSupport
  36  */
  37 class BidirectionalSupport : public BaseObject
  38 {
  39 public:
  40   /**
  41    * Constructor
  42    */
  43   BidirectionalSupport();
  44
  45   /**
  46    * Destructor
  47    */
  48   ~BidirectionalSupport();
  49
  50   /**
  51    * @copydoc Dali::BidirectionalSupport::Get()
  52    */
  53   static TextAbstraction::BidirectionalSupport Get();
  54
  55   /**
  56    * @copydoc Dali::BidirectionalSupport::CreateInfo()
  57    */
  58   BidiInfoIndex CreateInfo(const Character* const paragraph,
  59                            Length                 numberOfCharacters,
  60                            bool                   matchLayoutDirection,
  61                            LayoutDirection::Type  layoutDirection);
  62
  63   /**
  64    * @copydoc Dali::BidirectionalSupport::DestroyInfo()
  65    */
  66   void DestroyInfo(BidiInfoIndex bidiInfoIndex);
  67
  68   /**
  69    * @copydoc Dali::BidirectionalSupport::Reorder()
  70    */
  71   void Reorder(BidiInfoIndex   bidiInfoIndex,
  72                CharacterIndex  firstCharacterIndex,
  73                Length          numberOfCharacters,
  74                CharacterIndex* visualToLogicalMap);
  75
  76   /**
  77    * @copydoc Dali::BidirectionalSupport::GetMirroredText()
  78    */
  79   bool GetMirroredText(Character*          text,
  80                        CharacterDirection* directions,
  81                        Length              numberOfCharacters);
  82
  83   /**
  84    * @copydoc Dali::BidirectionalSupport::GetParagraphDirection()
  85    */
  86   bool GetParagraphDirection(BidiInfoIndex bidiInfoIndex) const;
  87
  88   /**
  89    * @copydoc Dali::BidirectionalSupport::GetCharactersDirection()
  90    */
  91   void GetCharactersDirection(BidiInfoIndex       bidiInfoIndex,
  92                               CharacterDirection* directions,
  93                               Length              numberOfCharacters);
  94
  95 private:
  96   /**
  97    * Helper for lazy initialization.
  98    */
  99   void CreatePlugin();
 100
 101 private:
 102   // Undefined copy constructor.
 103   BidirectionalSupport(const BidirectionalSupport&);
 104
 105   // Undefined assignment constructor.
 106   BidirectionalSupport& operator=(const BidirectionalSupport&);
 107
 108 private:
 109   struct Plugin;
 110   Plugin* mPlugin;
 111
 112 }; // class BidirectionalSupport
 113
 114 } // namespace Internal
 115
 116 } // namespace TextAbstraction
 117
 118 inline static TextAbstraction::Internal::BidirectionalSupport& GetImplementation(TextAbstraction::BidirectionalSupport& bidirectionalSupport)
 119 {
 120   DALI_ASSERT_ALWAYS(bidirectionalSupport && "bidirectional support handle is empty");
 121   BaseObject& handle = bidirectionalSupport.GetBaseObject();
 122   return static_cast<TextAbstraction::Internal::BidirectionalSupport&>(handle);
 123 }
 124
 125 inline static const TextAbstraction::Internal::BidirectionalSupport& GetImplementation(const TextAbstraction::BidirectionalSupport& bidirectionalSupport)
 126 {
 127   DALI_ASSERT_ALWAYS(bidirectionalSupport && "bidirectional support handle is empty");
 128   const BaseObject& handle = bidirectionalSupport.GetBaseObject();
 129   return static_cast<const TextAbstraction::Internal::BidirectionalSupport&>(handle);
 130 }
 131
 132 } // namespace Dali
 133
 134 #endif // DALI_INTERNAL_TEXT_ABSTRACTION_BIDIRECTIONAL_SUPPORT_IMPL_H