Mike-Solar
f95590e924
UndoStack push_pre_executed, FolderAddChild-based true folder moves, NodeViewDeleteCommand delete-then-reconnect support, event emission points for the facade event bus, and related internal adjustments.
152 lines
3.5 KiB
C++
152 lines
3.5 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2022 Olive Team
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Modifications Copyright (C) 2025 mikesolar
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#ifndef OAK_UNDOSTACK_H
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#define OAK_UNDOSTACK_H
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#include <QAction>
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#include <QAbstractItemModel>
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#include "common/define.h"
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#include "undo/undocommand.h"
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namespace olive
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{
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class UndoStack : public QAbstractItemModel {
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Q_OBJECT
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public:
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UndoStack();
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virtual ~UndoStack() override;
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void push(UndoCommand *command, const QString &name);
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/**
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* @brief Push a command that has already been executed (redo skipped).
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*
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* Used by the facade undo-group: child commands are added to the group
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* and executed eagerly, then the whole group is pushed with this method
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* so it is not redone again. Empty commands are discarded.
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*/
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void push_pre_executed(UndoCommand *command, const QString &name);
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void jump(size_t index);
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void clear();
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bool can_undo() const;
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bool can_redo() const
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{
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return !undone_commands_.empty();
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}
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void update_actions();
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QAction *GetUndoAction()
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{
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return undo_action_;
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}
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QAction *GetRedoAction()
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{
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return redo_action_;
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}
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virtual int
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columnCount(const QModelIndex &parent = QModelIndex()) const override;
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virtual QVariant data(const QModelIndex &index,
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int role = Qt::DisplayRole) const override;
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virtual QModelIndex
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index(int row, int column,
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const QModelIndex &parent = QModelIndex()) const override;
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virtual QModelIndex parent(const QModelIndex &index) const override;
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virtual int
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rowCount(const QModelIndex &parent = QModelIndex()) const override;
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virtual QVariant headerData(int section, Qt::Orientation orientation,
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int role = Qt::DisplayRole) const override;
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virtual bool
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hasChildren(const QModelIndex &parent = QModelIndex()) const override;
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// Facade accessors (oakengine/undo.h C ABI): row-based history queries.
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// Rows 0..done_count()-1 are done commands (commands_ in order), rows
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// done_count()..command_count()-1 are undone commands (undone_commands_
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// in order, most recently undone first).
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int command_count() const
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{
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return int(commands_.size() + undone_commands_.size());
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}
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int done_count() const
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{
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return int(commands_.size());
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}
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bool command_is_done(int row) const
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{
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return row >= 0 && row < done_count();
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}
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QString command_name(int row) const
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{
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if (row < 0 || row >= command_count()) {
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return QString();
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}
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if (row < done_count()) {
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auto it = commands_.begin();
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std::advance(it, row);
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return it->name;
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}
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auto it = undone_commands_.begin();
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std::advance(it, row - done_count());
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return it->name;
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}
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signals:
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void index_changed(int i);
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public slots:
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void undo();
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void redo();
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private:
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static const int k_max_undo_commands;
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struct CommandEntry {
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UndoCommand *command;
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QString name;
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};
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std::list<CommandEntry> commands_;
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std::list<CommandEntry> undone_commands_;
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QAction *undo_action_;
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QAction *redo_action_;
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};
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}
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#endif // OAK_UNDOSTACK_H
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