1 #ifndef DALI_TOOLKIT_TEXT_BIDIRECTIONAL_SUPPORT_H
2 #define DALI_TOOLKIT_TEXT_BIDIRECTIONAL_SUPPORT_H
5 * Copyright (c) 2021 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/actors/actor-enumerations.h>
23 #include <dali/public-api/common/dali-vector.h>
26 #include <dali-toolkit/internal/text/bidirectional-line-info-run.h>
27 #include <dali-toolkit/internal/text/bidirectional-paragraph-info-run.h>
28 #include <dali-toolkit/internal/text/line-run.h>
29 #include <dali-toolkit/internal/text/script-run.h>
38 * Sets the bidirectional info into the logical model.
40 * @param[in] text Vector of UTF-32 characters.
41 * @param[in] scripts Vector containing the script runs for the whole text.
42 * @param[in] lineBreakInfo The line break info.
43 * @param[in] startIndex The character from where the bidirectional info is set.
44 * @param[in] numberOfCharacters The number of characters.
45 * @param[out] bidirectionalInfo Vector with the bidirectional infor for each paragraph.
46 * @param[in] matchLayoutDirection Whether match for layout direction or not.
47 * @param[in] layoutDirection The direction of the layout.
49 void SetBidirectionalInfo(const Vector<Character>& text,
50 const Vector<ScriptRun>& scripts,
51 const Vector<LineBreakInfo>& lineBreakInfo,
52 CharacterIndex startIndex,
53 Length numberOfCharacters,
54 Vector<BidirectionalParagraphInfoRun>& bidirectionalInfo,
55 bool matchLayoutDirection = false,
56 Dali::LayoutDirection::Type layoutDirection = LayoutDirection::LEFT_TO_RIGHT);
59 * @brief Sets the visual to logical map table for a given line.
61 * @param[in] bidirectionalParagraphInfo The paragraph's bidirectional info.
62 * @param[out] lineInfoRuns Line runs with the visual to logical conversion maps.
63 * @param[in] bidiLineIndex Index to the line's bidirectional info.
64 * @param[in] startIndex The character from where the bidirectional info is set.
65 * @param[in] numberOfCharacters The number of characters.
66 * @param[in] startIndexInSecondHalfLine The character from where the bidirectional info is set for the second half of line..
67 * @param[in] numberOfCharactersInSecondHalfLine The number of characters for the second half of line..
68 * @param[in] direction The direction of the line.
70 void ReorderLine(const BidirectionalParagraphInfoRun& bidirectionalParagraphInfo,
71 Vector<BidirectionalLineInfoRun>& lineInfoRuns,
72 BidirectionalLineRunIndex bidiLineIndex,
73 CharacterIndex startIndex,
74 Length numberOfCharacters,
75 CharacterIndex startIndexInSecondHalfLine,
76 Length numberOfCharactersInSecondHalfLine,
77 CharacterDirection direction);
80 * @brief Replaces any character in the right to left paragraphs which could be mirrored.
82 * @param[in] text The text.
83 * @param[in] directions Vector with the direction of each paragraph.
84 * @param[in] bidirectionalInfo Vector with the bidirectional infor for each paragraph.
85 * @param[in] startIndex The character from where the text is mirrored.
86 * @param[in] numberOfCharacters The number of characters.
87 * @param[out] mirroredText The mirroredText.
89 * @return @e true if a character has been replaced.
91 bool GetMirroredText(const Vector<Character>& text,
92 const Vector<CharacterDirection>& directions,
93 const Vector<BidirectionalParagraphInfoRun>& bidirectionalInfo,
94 CharacterIndex startIndex,
95 Length numberOfCharacters,
96 Vector<Character>& mirroredText);
99 * @brief Retrieves the characters' directions.
101 * @pre The @p logicalModel needs to have a text set.
102 * @pre The @p logicalModel needs to have the bidirectional info indices for each paragraph set.
104 * @param[in] bidirectionalInfo Vector with the bidirectional infor for each paragraph.
105 * @param[in] totalNumberOfCharacters The number of characters of the whole text.
106 * @param[in] startIndex The character from where the direction info is set.
107 * @param[in] numberOfCharacters The number of characters.
108 * @param[out] directions The direction, @e false is left to right and @e true is right to left, of each character of the paragraph.
110 void GetCharactersDirection(const Vector<BidirectionalParagraphInfoRun>& bidirectionalInfo,
111 Length totalNumberOfCharacters,
112 CharacterIndex startIndex,
113 Length numberOfCharacters,
114 Vector<CharacterDirection>& directions);
118 } // namespace Toolkit
122 #endif // DALI_TOOLKIT_TEXT_BIDIRECTIONAL_SUPPORT_H