comparison: src/edithistory.h
src/edithistory.h
- changeset 200
- ca23936b455b
- parent 199
- 6988973515d2
- child 201
- 5d201ee4a9c3
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| 199:6988973515d2 | 200:ca23936b455b |
|---|---|
| 1 /* | |
| 2 * LDForge: LDraw parts authoring CAD | |
| 3 * Copyright (C) 2013 - 2020 Teemu Piippo | |
| 4 * | |
| 5 * This program is free software: you can redistribute it and/or modify | |
| 6 * it under the terms of the GNU General Public License as published by | |
| 7 * the Free Software Foundation, either version 3 of the License, or | |
| 8 * (at your option) any later version. | |
| 9 * | |
| 10 * This program is distributed in the hope that it will be useful, | |
| 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 * GNU General Public License for more details. | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License | |
| 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 17 */ | |
| 18 | |
| 19 #pragma once | |
| 20 #include "main.h" | |
| 21 #include "model.h" | |
| 22 | |
| 23 class ModelEditor; | |
| 24 | |
| 25 class AbstractHistoryEntry | |
| 26 { | |
| 27 public: | |
| 28 virtual void undo(ModelEditor& editContext) = 0; | |
| 29 virtual void redo(ModelEditor& editContext) = 0; | |
| 30 }; | |
| 31 | |
| 32 class InsertHistoryEntry : public AbstractHistoryEntry | |
| 33 { | |
| 34 public: | |
| 35 InsertHistoryEntry(int position, const QByteArray& state) : | |
| 36 position{position}, | |
| 37 state{state} {} | |
| 38 void undo(ModelEditor& editContext) override; | |
| 39 void redo(ModelEditor& editContext) override; | |
| 40 protected: | |
| 41 int position; | |
| 42 QByteArray state; | |
| 43 }; | |
| 44 | |
| 45 class DeleteHistoryEntry : public InsertHistoryEntry | |
| 46 { | |
| 47 public: | |
| 48 void undo(ModelEditor& editContext) override; | |
| 49 void redo(ModelEditor& editContext) override; | |
| 50 }; | |
| 51 | |
| 52 class EditHistoryEntry : public AbstractHistoryEntry | |
| 53 { | |
| 54 public: | |
| 55 EditHistoryEntry(int position, const QByteArray& stateBefore, const QByteArray& stateAfter) : | |
| 56 position{position}, | |
| 57 stateBefore{stateBefore}, | |
| 58 stateAfter{stateAfter} {} | |
| 59 void undo(ModelEditor& editContext) override; | |
| 60 void redo(ModelEditor& editContext) override; | |
| 61 private: | |
| 62 int position; | |
| 63 QByteArray stateBefore; | |
| 64 QByteArray stateAfter; | |
| 65 }; | |
| 66 | |
| 67 class EditHistory | |
| 68 { | |
| 69 public: | |
| 70 using Changeset = std::vector<std::unique_ptr<AbstractHistoryEntry>>; | |
| 71 EditHistory(); | |
| 72 /** | |
| 73 * @brief Adds a new entry into the edit history. Creates a new changeset if there is not one already open. | |
| 74 * If behind in history, deletes all history entries in front. | |
| 75 */ | |
| 76 template<typename T, typename... Rs> | |
| 77 void add(Rs&&... args) | |
| 78 { | |
| 79 if (not this->changesetOpen) | |
| 80 { | |
| 81 while (this->position < this->changesets.size()) | |
| 82 { | |
| 83 this->changesets.erase(this->changesets.end() - 1); | |
| 84 } | |
| 85 if (this->changesets.empty()) | |
| 86 { | |
| 87 this->changesets.emplace_back(); | |
| 88 } | |
| 89 this->changesetOpen = true; | |
| 90 } | |
| 91 this->changesets.back().emplace_back(args...); | |
| 92 } | |
| 93 void commit() | |
| 94 { | |
| 95 this->changesetOpen = false; | |
| 96 this->position += 1; | |
| 97 } | |
| 98 private: | |
| 99 std::vector<Changeset> changesets; | |
| 100 std::size_t position = 0; | |
| 101 bool changesetOpen = false; | |
| 102 }; |
