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/devel-api/text-abstraction/text-abstraction-definitions.h>
25 #include <dali/public-api/object/base-handle.h>
30 namespace TextAbstraction
33 namespace Internal DALI_INTERNAL
36 class BidirectionalSupport;
41 * BidirectionalSupport API
44 class DALI_IMPORT_API BidirectionalSupport : public BaseHandle
50 * @brief Create an uninitialized TextAbstraction handle.
53 BidirectionalSupport();
58 * This is non-virtual since derived Handle types must not contain data or virtual methods.
60 ~BidirectionalSupport();
63 * @brief This constructor is used by BidirectionalSupport::Get().
65 * @param[in] implementation a pointer to the internal bidirectional support object.
67 explicit DALI_INTERNAL BidirectionalSupport( Internal::BidirectionalSupport* implementation );
70 * @brief Retrieve a handle to the BidirectionalSupport instance.
72 * @return A handle to the BidirectionalSupport
74 static BidirectionalSupport Get();
77 * @brief Creates bidirectional data for the whole paragraph.
79 * @param[in] paragraph Pointer to the first character of the paragraph coded in UTF32.
80 * @param[in] numberOfCharacters The number of characters of the paragraph.
82 * @return An index of an object inside a table storing the bidirectional data.
84 BidiInfoIndex CreateInfo( const Character* const paragraph,
85 Length numberOfCharacters );
88 * @brief Destroys the bidirectional data.
90 * @param[in] bidiInfoIndex The index to the of the object inside the table storing the bidirectional data for the current paragraph.
92 void DestroyInfo( BidiInfoIndex bidiInfoIndex );
95 * @brief Reorders a line of a paragraph.
97 * @pre visualToLogicalMap must have enough space allocated for @p numberOfCharacters.
99 * @param[in] bidiInfoIndex The index to the of the object inside the table storing the bidirectional data for the current paragraph.
100 * @param[in] firstCharacterIndex The first character of the line within the whole paragraph.
101 * @param[in] numberOfCharacters The number of characters of the line.
102 * @param[out] visualToLogicalMap The visual to logical conversion map.
104 void Reorder( BidiInfoIndex bidiInfoIndex,
105 CharacterIndex firstCharacterIndex,
106 Length numberOfCharacters,
107 CharacterIndex* visualToLogicalMap );
110 * @brief Replaces any character which could be mirrored.
112 * @param[in,out] text The text.
113 * @param[in] directions The direction of each paragraph.
114 * @param[in] numberOfCharacters The number of characters.
116 * @return @e true if a character has been replaced.
118 bool GetMirroredText( Character* text,
119 CharacterDirection* directions,
120 Length numberOfCharacters );
123 * @brief Retrieves the paragrpah's direction.
125 * @param[in] bidiInfoIndex The index to the of the object inside the table storing the bidirectional data for the current paragraph.
127 * @return @e true if the paragraph is right to left, otherwise @e false.
129 bool GetParagraphDirection( BidiInfoIndex bidiInfoIndex ) const;
132 * @brief Retrieves the character's directions.
134 * @param[in] bidiInfoIndex The index to the of the object inside the table storing the bidirectional data for the current paragraph.
135 * @param[out] directions The direction, @e false is left to right and @e true is right to left, of each character of the paragraph.
136 * @param[in] numberOfCharacters The number of characters.
138 void GetCharactersDirection( BidiInfoIndex bidiInfoIndex,
139 CharacterDirection* directions,
140 Length numberOfCharacters );
143 } // namespace TextAbstraction
147 #endif // __DALI_PLATFORM_TEXT_ABSTRACTION_BIDIRECTIONAL_SUPPORT_H__