| 1 | /* |
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| 2 | SPDX-FileCopyrightText: 2016 Volker Krause <vkrause@kde.org> |
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| 3 | |
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| 4 | SPDX-License-Identifier: MIT |
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| 5 | */ |
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| 6 | |
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| 7 | #ifndef KSYNTAXHIGHLIGHTING_FOLDINGREGION_H |
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| 8 | #define KSYNTAXHIGHLIGHTING_FOLDINGREGION_H |
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| 9 | |
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| 10 | #include "ksyntaxhighlighting_export.h" |
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| 11 | |
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| 12 | #include <QTypeInfo> |
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| 13 | |
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| 14 | namespace KSyntaxHighlighting |
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| 15 | { |
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| 16 | /** Represents a begin or end of a folding region. |
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| 17 | * @since 5.28 */ |
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| 18 | class KSYNTAXHIGHLIGHTING_EXPORT FoldingRegion |
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| 19 | { |
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| 20 | public: |
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| 21 | /** |
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| 22 | * Defines whether a FoldingRegion starts or ends a folding region. |
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| 23 | */ |
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| 24 | enum Type { |
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| 25 | //! Used internally as indicator for an invalid FoldingRegion. |
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| 26 | None, |
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| 27 | //! Indicates the start of a FoldingRegion. |
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| 28 | Begin, |
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| 29 | //! Indicates the end of a FoldingRegion. |
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| 30 | End |
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| 31 | }; |
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| 32 | |
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| 33 | /** |
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| 34 | * Constructs an invalid folding region, meaning that isValid() returns @e false. |
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| 35 | * To obtain valid instances, see AbstractHighlighter::applyFolding(). |
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| 36 | */ |
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| 37 | FoldingRegion(); |
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| 38 | |
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| 39 | /** Compares two FoldingRegion instances for equality. */ |
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| 40 | bool operator==(const FoldingRegion &other) const; |
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| 41 | |
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| 42 | /** |
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| 43 | * Returns @c true if this is a valid folding region. |
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| 44 | * A valid FoldingRegion is defined by a type() other than Type::None. |
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| 45 | * |
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| 46 | * @note The FoldingRegion%s passed in AbstractHighlighter::applyFolding() |
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| 47 | * are always valid. |
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| 48 | */ |
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| 49 | bool isValid() const; |
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| 50 | |
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| 51 | /** |
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| 52 | * Returns a unique identifier for this folding region. |
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| 53 | * |
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| 54 | * As example, the C/C++ highlighter starts and ends a folding region for |
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| 55 | * scopes, e.g.: |
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| 56 | * \code |
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| 57 | * void foo() { // '{' starts a folding region |
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| 58 | * if (bar()) { // '{' starts a (nested) folding region |
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| 59 | * } // '}' ends the (nested) folding region |
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| 60 | * } // '}' ends the outer folding region |
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| 61 | * \endcode |
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| 62 | * In this example, all braces '{' and '}' have the same id(), meaning that |
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| 63 | * if you want to find the matching closing region for the first opening |
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| 64 | * brace, you need to do kind of a reference counting to find the correct |
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| 65 | * closing brace. |
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| 66 | */ |
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| 67 | int id() const; |
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| 68 | |
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| 69 | /** |
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| 70 | * Returns whether this is the begin or end of a region. |
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| 71 | * |
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| 72 | * @note The FoldingRegion%s passed in AbstractHighlighter::applyFolding() |
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| 73 | * are always valid, i.e. either Type::Begin or Type::End. |
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| 74 | */ |
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| 75 | Type type() const; |
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| 76 | |
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| 77 | /** |
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| 78 | * Returns the matching start or end region. |
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| 79 | * |
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| 80 | * @note Will return invalid region for an invalid region. |
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| 81 | * |
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| 82 | * @since 6.0 |
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| 83 | */ |
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| 84 | FoldingRegion sibling() const; |
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| 85 | |
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| 86 | private: |
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| 87 | friend class Rule; |
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| 88 | KSYNTAXHIGHLIGHTING_NO_EXPORT FoldingRegion(Type type, int id); |
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| 89 | |
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| 90 | // 0 is invalid, positive begin, negative end |
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| 91 | int m_idWithType = 0; |
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| 92 | }; |
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| 93 | |
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| 94 | } |
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| 95 | |
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| 96 | QT_BEGIN_NAMESPACE |
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| 97 | Q_DECLARE_TYPEINFO(KSyntaxHighlighting::FoldingRegion, Q_PRIMITIVE_TYPE); |
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| 98 | QT_END_NAMESPACE |
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| 99 | |
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| 100 | #endif |
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| 101 | |
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