1 | /* |
2 | SPDX-FileCopyrightText: 2016 Volker Krause <vkrause@kde.org> |
3 | SPDX-FileCopyrightText: 2018 Christoph Cullmann <cullmann@kde.org> |
4 | |
5 | SPDX-License-Identifier: MIT |
6 | */ |
7 | |
8 | #ifndef KSYNTAXHIGHLIGHTING_STATE_P_H |
9 | #define KSYNTAXHIGHLIGHTING_STATE_P_H |
10 | |
11 | #include <vector> |
12 | |
13 | #include <QSharedData> |
14 | #include <QStringList> |
15 | |
16 | namespace KSyntaxHighlighting |
17 | { |
18 | class Context; |
19 | |
20 | class StateData : public QSharedData |
21 | { |
22 | friend class State; |
23 | friend class AbstractHighlighter; |
24 | friend std::size_t qHash(const StateData &, std::size_t); |
25 | |
26 | public: |
27 | StateData() = default; |
28 | |
29 | static StateData *reset(State &state); |
30 | static StateData *detach(State &state); |
31 | |
32 | static StateData *get(const State &state) |
33 | { |
34 | return state.d.data(); |
35 | } |
36 | |
37 | std::size_t size() const |
38 | { |
39 | return m_contextStack.size(); |
40 | } |
41 | |
42 | void push(Context *context, QStringList &&captures); |
43 | |
44 | /** |
45 | * Pop the number of elements given from the top of the current stack. |
46 | * Will not pop the initial element. |
47 | * @param popCount number of elements to pop |
48 | * @return false if one has tried to pop the initial context, else true |
49 | */ |
50 | bool pop(int popCount); |
51 | |
52 | Context *topContext() const |
53 | { |
54 | return m_contextStack.back().context; |
55 | } |
56 | |
57 | const QStringList &topCaptures() const |
58 | { |
59 | return m_contextStack.back().captures; |
60 | } |
61 | |
62 | struct StackValue { |
63 | Context *context; |
64 | QStringList captures; |
65 | |
66 | bool operator==(const StackValue &other) const |
67 | { |
68 | return context == other.context && captures == other.captures; |
69 | } |
70 | }; |
71 | |
72 | private: |
73 | /** |
74 | * definition id to filter out invalid states |
75 | */ |
76 | uint64_t m_defId = 0; |
77 | |
78 | /** |
79 | * the context stack combines the active context + valid captures |
80 | */ |
81 | std::vector<StackValue> m_contextStack; |
82 | }; |
83 | |
84 | inline std::size_t qHash(const StateData::StackValue &stackValue, std::size_t seed = 0) |
85 | { |
86 | return qHashMulti(seed, args: stackValue.context, args: stackValue.captures); |
87 | } |
88 | |
89 | inline std::size_t qHash(const StateData &k, std::size_t seed = 0) |
90 | { |
91 | return qHashMulti(seed, args: k.m_defId, args: qHashRange(first: k.m_contextStack.begin(), last: k.m_contextStack.end(), seed)); |
92 | } |
93 | } |
94 | |
95 | #endif |
96 | |