HistoryManager.h

// Copyright @ MyScript. All rights reserved.
 
#pragma once
 
#include <iink/String.h>
 
#include <vector>
 
namespace myscript {
namespace iink {
 
/*
 * Changeset operation types.
 * @since 3.0
 */
enum class ChangesetOperationType
{
  ADD       = 0,  
  ERASE     = 1,  
  TRANSFORM = 2   
};
 
/*
 * Represents a changeset operation.
 * @since 3.0
 */
struct ChangesetOperation
{
  ChangesetOperationType type;                    
  std::vector<myscript::iink::String> strokeIds;  
};
 
class HistoryManager
{
public:
 
  virtual ~HistoryManager() = default;
 
  virtual void undo() = 0;
 
  virtual void redo() = 0;
 
  virtual int getUndoRedoStackIndex() = 0;
 
  virtual int getPossibleUndoCount() = 0;
 
  virtual int getPossibleRedoCount() = 0;
 
  virtual String getUndoRedoIdAt(int stackIndex) = 0;
 
  virtual std::vector<ChangesetOperation> getUndoChangesetTo(const String& id) = 0;
 
  virtual std::vector<ChangesetOperation> getRedoChangesetFrom(const String& id) = 0;
};
 
}
}