| 1 | /* |
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| 2 | * Qt implementation of TCIME library |
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| 3 | * This file is part of the Qt Virtual Keyboard module. |
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| 4 | * Contact: http://www.qt.io/licensing/ |
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| 5 | * |
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| 6 | * Copyright (C) 2015 The Qt Company |
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| 7 | * Copyright 2010 Google Inc. |
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| 8 | * |
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| 9 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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| 10 | * you may not use this file except in compliance with the License. |
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| 11 | * You may obtain a copy of the License at |
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| 12 | * |
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| 13 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 14 | * |
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| 15 | * Unless required by applicable law or agreed to in writing, software |
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| 16 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 17 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 18 | * See the License for the specific language governing permissions and |
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| 19 | * limitations under the License. |
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| 20 | */ |
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| 21 | |
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| 22 | #ifndef CANGJIETABLE_H |
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| 23 | #define CANGJIETABLE_H |
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| 24 | |
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| 25 | #include <QChar> |
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| 26 | #include <QString> |
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| 27 | |
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| 28 | namespace tcime { |
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| 29 | |
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| 30 | /** |
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| 31 | * Defines cangjie letters and calculates the index of the given cangjie code. |
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| 32 | */ |
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| 33 | class CangjieTable |
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| 34 | { |
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| 35 | Q_DISABLE_COPY(CangjieTable) |
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| 36 | CangjieTable() {} |
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| 37 | |
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| 38 | public: |
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| 39 | |
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| 40 | // Cangjie codes contain at most five letters. A cangjie code can be |
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| 41 | // converted to a numerical code by the number-index of each letter. |
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| 42 | // The absent letter will be indexed as 0 if the cangjie code contains less |
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| 43 | // than five-letters. |
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| 44 | static const int MAX_CODE_LENGTH; |
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| 45 | static const int MAX_SIMPLIFIED_CODE_LENGTH; |
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| 46 | |
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| 47 | /** |
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| 48 | * Returns {@code true} only if the given character is a valid cangjie letter. |
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| 49 | */ |
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| 50 | static bool isLetter(QChar c) noexcept; |
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| 51 | |
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| 52 | /** |
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| 53 | * Returns the primary index calculated by the first and last letter of |
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| 54 | * the given cangjie code. |
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| 55 | * |
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| 56 | * @param code should not be null. |
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| 57 | * @return -1 for invalid code. |
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| 58 | */ |
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| 59 | static int getPrimaryIndex(QStringView code) noexcept; |
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| 60 | |
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| 61 | /** |
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| 62 | * Returns the secondary index calculated by letters between the first and |
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| 63 | * last letter of the given cangjie code. |
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| 64 | * |
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| 65 | * @param code should not be null. |
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| 66 | * @return -1 for invalid code. |
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| 67 | */ |
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| 68 | static int getSecondaryIndex(QStringView code) noexcept; |
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| 69 | }; |
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| 70 | |
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| 71 | } |
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| 72 | |
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| 73 | #endif // CANGJIETABLE_H |
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| 74 | |
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