1 #ifndef __DALI_PLATFORM_TEXT_ABSTRACTION_BIDIRECTIONAL_SUPPORT_H__
2 #define __DALI_PLATFORM_TEXT_ABSTRACTION_BIDIRECTIONAL_SUPPORT_H__
5 * Copyright (c) 2015 Samsung Electronics Co., Ltd.
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
11 * http://www.apache.org/licenses/LICENSE-2.0
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.
22 #include <dali/public-api/text-abstraction/text-abstraction.h>
25 #include <dali/public-api/object/base-handle.h>
30 namespace TextAbstraction
33 namespace Internal DALI_INTERNAL
36 class BidirectionalSupport;
42 namespace TextAbstraction
46 * BidirectionalSupport API
49 class DALI_IMPORT_API BidirectionalSupport : public BaseHandle
55 * @brief Create an uninitialized TextAbstraction handle.
58 BidirectionalSupport();
63 * This is non-virtual since derived Handle types must not contain data or virtual methods.
65 ~BidirectionalSupport();
68 * @brief This constructor is used by BidirectionalSupport::Get().
70 * @param[in] implementation a pointer to the internal bidirectional support object.
72 explicit DALI_INTERNAL BidirectionalSupport( Internal::BidirectionalSupport* implementation );
75 * @brief Retrieve a handle to the BidirectionalSupport instance.
77 * @return A handle to the BidirectionalSupport
79 static BidirectionalSupport Get();
82 * @brief Creates bidirectional data for the whole paragraph.
84 * @param[in] paragraph Pointer to the first character of the paragraph coded in UTF32.
85 * @param[in] numberOfCharacters The number of characters of the paragraph.
87 * @return An index of an object inside a table storing the bidirectional data.
89 BidiInfoIndex CreateInfo( const Character* const paragraph,
90 Length numberOfCharacters );
93 * @brief Destroys the bidirectional data.
95 * @param[in] bidiInfoIndex The index to the of the object inside the table storing the bidirectional data for the current paragraph.
97 void DestroyInfo( BidiInfoIndex bidiInfoIndex );
100 * @brief Reorders a line of a paragraph.
102 * @pre visualToLogicalMap must have enough space allocated for @p numberOfCharacters.
104 * @param[in] bidiInfoIndex The index to the of the object inside the table storing the bidirectional data for the current paragraph.
105 * @param[in] firstCharacterIndex The first character of the line within the whole paragraph.
106 * @param[in] numberOfCharacters The number of characters of the line.
107 * @param[out] visualToLogicalMap The visual to logical conversion map.
109 void Reorder( BidiInfoIndex bidiInfoIndex,
110 CharacterIndex firstCharacterIndex,
111 Length numberOfCharacters,
112 CharacterIndex* visualToLogicalMap );
115 } // namespace TextAbstraction
119 #endif // __DALI_PLATFORM_TEXT_ABSTRACTION_BIDIRECTIONAL_SUPPORT_H__