1 | /* |
2 | Author: Marco Costalba (C) 2005-2007 |
3 | |
4 | Copyright: See COPYING file that comes with this distribution |
5 | |
6 | */ |
7 | #ifndef LANES_H |
8 | #define LANES_H |
9 | |
10 | #include <QString> |
11 | #include <QVector> |
12 | |
13 | #include <LaneType.h> |
14 | #include <Lane.h> |
15 | |
16 | // |
17 | // At any given time, the Lanes class represents a single revision (row) of the history graph. |
18 | // The Lanes class contains a vector of the sha1 hashes of the next commit to appear in each lane (column). |
19 | // The Lanes class also contains a vector used to decide which glyph to draw on the history graph. |
20 | // |
21 | // For each revision (row) (from recent (top) to ancient past (bottom)), the Lanes class is updated, and the |
22 | // current revision (row) of glyphs is saved elsewhere (via getLanes()). |
23 | // |
24 | // The ListView class is responsible for rendering the glyphs. |
25 | // |
26 | |
27 | class Lanes |
28 | { |
29 | public: |
30 | Lanes() = default; |
31 | bool isEmpty() { return typeVec.empty(); } |
32 | void init(const QString &expectedSha); |
33 | void clear(); |
34 | bool isFork(const QString &sha, bool &isDiscontinuity); |
35 | void setFork(const QString &sha); |
36 | void setMerge(const QStringList &parents); |
37 | void setInitial(); |
38 | void changeActiveLane(const QString &sha); |
39 | void afterMerge(); |
40 | void afterFork(); |
41 | bool isBranch(); |
42 | void afterBranch(); |
43 | void nextParent(const QString &sha); |
44 | void setLanes(QVector<Lane> &ln) { ln = typeVec; } // O(1) vector is implicitly shared |
45 | QVector<Lane> getLanes() const { return typeVec; } |
46 | |
47 | private: |
48 | int findNextSha(const QString &next, int pos); |
49 | int findType(LaneType type, int pos); |
50 | int add(LaneType type, const QString &next, int pos); |
51 | bool isNode(Lane lane) const; |
52 | |
53 | int activeLane; |
54 | QVector<Lane> typeVec; // Describes which glyphs should be drawn. |
55 | QVector<QString> nextShaVec; // The sha1 hashes of the next commit to appear in each lane (column). |
56 | LaneType NODE = LaneType::MERGE_FORK; |
57 | LaneType NODE_R = LaneType::MERGE_FORK_R; |
58 | LaneType NODE_L = LaneType::MERGE_FORK_L; |
59 | }; |
60 | |
61 | #endif |
62 | |