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39 | |
40 | #ifndef QQMLCHANGESET_P_H |
41 | #define QQMLCHANGESET_P_H |
42 | |
43 | // |
44 | // W A R N I N G |
45 | // ------------- |
46 | // |
47 | // This file is not part of the Qt API. It exists purely as an |
48 | // implementation detail. This header file may change from version to |
49 | // version without notice, or even be removed. |
50 | // |
51 | // We mean it. |
52 | // |
53 | |
54 | #include <QtCore/qdebug.h> |
55 | #include <QtCore/qvector.h> |
56 | #include <QtQmlModels/private/qtqmlmodelsglobal_p.h> |
57 | |
58 | QT_BEGIN_NAMESPACE |
59 | |
60 | class Q_QMLMODELS_PRIVATE_EXPORT QQmlChangeSet |
61 | { |
62 | public: |
63 | struct MoveKey |
64 | { |
65 | MoveKey() {} |
66 | MoveKey(int moveId, int offset) : moveId(moveId), offset(offset) {} |
67 | int moveId = -1; |
68 | int offset = 0; |
69 | }; |
70 | |
71 | // The storrage for Change (below). This struct is trivial, which it has to be in order to store |
72 | // it in a QV4::Heap::Base object. The Change struct doesn't add any storage fields, so it is |
73 | // safe to cast ChangeData to/from Change. |
74 | struct ChangeData |
75 | { |
76 | int index; |
77 | int count; |
78 | int moveId; |
79 | int offset; |
80 | }; |
81 | |
82 | struct Change: ChangeData |
83 | { |
84 | Change() { |
85 | index = 0; |
86 | count = 0; |
87 | moveId = -1; |
88 | offset = 0; |
89 | } |
90 | Change(int index, int count, int moveId = -1, int offset = 0) { |
91 | this->index = index; |
92 | this->count = count; |
93 | this->moveId = moveId; |
94 | this->offset = offset; |
95 | } |
96 | |
97 | bool isMove() const { return moveId >= 0; } |
98 | |
99 | MoveKey moveKey(int index) const { |
100 | return MoveKey(moveId, index - Change::index + offset); } |
101 | |
102 | int start() const { return index; } |
103 | int end() const { return index + count; } |
104 | }; |
105 | |
106 | QQmlChangeSet(); |
107 | QQmlChangeSet(const QQmlChangeSet &changeSet); |
108 | ~QQmlChangeSet(); |
109 | |
110 | QQmlChangeSet &operator =(const QQmlChangeSet &changeSet); |
111 | |
112 | const QVector<Change> &removes() const { return m_removes; } |
113 | const QVector<Change> &inserts() const { return m_inserts; } |
114 | const QVector<Change> &changes() const { return m_changes; } |
115 | |
116 | void insert(int index, int count); |
117 | void remove(int index, int count); |
118 | void move(int from, int to, int count, int moveId); |
119 | void change(int index, int count); |
120 | |
121 | void insert(const QVector<Change> &inserts); |
122 | void remove(const QVector<Change> &removes, QVector<Change> *inserts = nullptr); |
123 | void move(const QVector<Change> &removes, const QVector<Change> &inserts); |
124 | void change(const QVector<Change> &changes); |
125 | void apply(const QQmlChangeSet &changeSet); |
126 | |
127 | bool isEmpty() const { return m_removes.empty() && m_inserts.empty() && m_changes.isEmpty(); } |
128 | |
129 | void clear() |
130 | { |
131 | m_removes.clear(); |
132 | m_inserts.clear(); |
133 | m_changes.clear(); |
134 | m_difference = 0; |
135 | } |
136 | |
137 | int difference() const { return m_difference; } |
138 | |
139 | private: |
140 | void remove(QVector<Change> *removes, QVector<Change> *inserts); |
141 | void change(QVector<Change> *changes); |
142 | |
143 | QVector<Change> m_removes; |
144 | QVector<Change> m_inserts; |
145 | QVector<Change> m_changes; |
146 | int m_difference; |
147 | }; |
148 | |
149 | Q_DECLARE_TYPEINFO(QQmlChangeSet::Change, Q_PRIMITIVE_TYPE); |
150 | Q_DECLARE_TYPEINFO(QQmlChangeSet::MoveKey, Q_PRIMITIVE_TYPE); |
151 | |
152 | inline uint qHash(const QQmlChangeSet::MoveKey &key) { return qHash(key: qMakePair(x: key.moveId, y: key.offset)); } |
153 | inline bool operator ==(const QQmlChangeSet::MoveKey &l, const QQmlChangeSet::MoveKey &r) { |
154 | return l.moveId == r.moveId && l.offset == r.offset; } |
155 | |
156 | Q_QMLMODELS_PRIVATE_EXPORT QDebug operator <<(QDebug debug, const QQmlChangeSet::Change &change); |
157 | Q_QMLMODELS_PRIVATE_EXPORT QDebug operator <<(QDebug debug, const QQmlChangeSet &change); |
158 | |
159 | QT_END_NAMESPACE |
160 | |
161 | #endif |
162 | |