change.h

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// edbee - Copyright (c) 2012-2025 by Rick Blommers and contributors
// SPDX-License-Identifier: MIT
 
#pragma once
 
#include "edbee/exports.h"
 
#include <QList>
#include <QString>
 
namespace edbee {
 
class TextDocument;
class TextEditorController;
 

class EDBEE_EXPORT Change {
public:
 
    virtual ~Change();

    virtual void execute( TextDocument* document ) = 0;
    virtual void revert( TextDocument* );
 
    virtual bool giveAndMerge( TextDocument* document, Change* textChange );
    virtual bool canUndo();
 
    virtual bool isPersistenceRequired();
    virtual TextEditorController* controllerContext();
    bool isDocumentChange();
    virtual bool isGroup();
 
    virtual QString toString() = 0;
};
class EDBEE_EXPORT Change {…};
 
 
//--------------------------------------------------------------
 

class EDBEE_EXPORT DocumentChange : public Change
{
public:
};
class EDBEE_EXPORT DocumentChange : public Change {…};
 
 
//--------------------------------------------------------------
 

class EDBEE_EXPORT EmptyDocumentChange : public Change
{
public:
    virtual bool isPersistenceRequired();
    virtual void execute( TextDocument* );
    virtual void revert( TextDocument*);
    virtual QString toString();
};
class EDBEE_EXPORT EmptyDocumentChange : public Change {…};
 
 
//--------------------------------------------------------------
 

class EDBEE_EXPORT ControllerChange : public Change
{
public:
    ControllerChange( TextEditorController* controller );
    virtual TextEditorController* controllerContext();
    virtual TextEditorController* controller();
 
private:
    TextEditorController* controllerRef_;  
};
class EDBEE_EXPORT ControllerChange : public Change {…};
 
 
//--------------------------------------------------------------
 

class EDBEE_EXPORT ChangeGroup : public ControllerChange
{
public:
    ChangeGroup( TextEditorController* controller );
    virtual ~ChangeGroup();
 
    virtual bool isGroup();
 
    virtual bool isDiscardable();
    virtual void groupClosed();
 
    virtual void execute( TextDocument* document);
    virtual void revert( TextDocument* document);
 
    virtual bool giveAndMerge( TextDocument* document, Change* textChange );
    virtual void flatten();
 
    virtual void giveChange( TextDocument* doc, Change* change );
    virtual Change* at( int idx );
    virtual Change* take( int idx );
    virtual int size();
    virtual void clear(bool performDelete=true);
    Change* last();
    Change* takeLast();
    int recursiveSize();
 
    virtual TextEditorController* controllerContext();
 
    virtual QString toString();
 
private:
    QList<Change*> changeList_;     
};
class EDBEE_EXPORT ChangeGroup : public ControllerChange {…};
 
 
 
 
} // edbee