JUCE/extras/Projucer/Source/ComponentEditor/PaintElements/jucer_PaintElementUndoableAction.h

/*
  ==============================================================================

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
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   Or:

   You may also use this code under the terms of the AGPLv3:
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   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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  ==============================================================================
*/

#pragma once

#include "../UI/jucer_JucerDocumentEditor.h"
#include "jucer_PaintElementGroup.h"

//==============================================================================
template <class ElementType>
class PaintElementUndoableAction    : public UndoableAction
{
public:
    JUCE_BEGIN_IGNORE_WARNINGS_MSVC (6011)

    PaintElementUndoableAction (ElementType* const element)
        : routine (*element->getOwner()),
          elementIndex (element->getOwner()->indexOfElement (element))
    {
        jassert (element != nullptr);

        if (element != nullptr && elementIndex < 0)
            findGroupIndices (element->getOwner(), element);

        jassert (elementIndex >= 0);
    }

    JUCE_END_IGNORE_WARNINGS_MSVC

    ElementType* getElement() const
    {
        if (containerGroups.size() > 0)
        {
            auto group = dynamic_cast<PaintElementGroup*> (routine.getElement (containerGroups.getFirst()));

            if (group == nullptr)
                return nullptr;

            for (int i = 1; i < containerGroups.size(); ++i)
            {
                group = dynamic_cast<PaintElementGroup*> (group->getElement (containerGroups.getUnchecked (i)));

                if (group == nullptr)
                    return nullptr;
            }

            auto e = dynamic_cast<ElementType*> (group->getElement (elementIndex));
            jassert (e != nullptr);
            return e;
        }
        else
        {
            auto e = dynamic_cast<ElementType*> (routine.getElement (elementIndex));
            jassert (e != nullptr);
            return e;
        }
    }

    int getSizeInUnits() override    { return 2; }

protected:
    PaintRoutine& routine;
    int elementIndex;
    Array <int> containerGroups;

    void changed() const
    {
        jassert (routine.getDocument() != nullptr);
        routine.getDocument()->changed();
    }

    void showCorrectTab() const
    {
        if (JucerDocumentEditor* const docHolder = JucerDocumentEditor::getActiveDocumentHolder())
            docHolder->showGraphics (&routine);

        if (routine.getSelectedElements().getNumSelected() == 0)
            if (ElementType* const e = dynamic_cast<ElementType*> (routine.getElement (elementIndex)))
                routine.getSelectedElements().selectOnly (e);
    }

private:
    void findGroupIndices (PaintRoutine* const pr, PaintElement* const element)
    {
        for (int i = pr->getNumElements(); --i >= 0;)
        {
            if (auto pg = dynamic_cast<PaintElementGroup*> (pr->getElement (i)))
            {
                if (pg->containsElement (element))
                {
                    containerGroups.add (i);
                    findGroupIndices (pg, element);
                }
            }
        }
    }

    void findGroupIndices (PaintElementGroup* const group, PaintElement* const element)
    {
        elementIndex = group->indexOfElement (element);

        if (elementIndex < 0)
        {
            for (int i = group->getNumElements(); --i >= 0;)
            {
                if (auto pg = dynamic_cast<PaintElementGroup*> (group->getElement (i)))
                {
                    if (pg->containsElement (element))
                    {
                        containerGroups.add (i);
                        findGroupIndices (pg, element);
                    }
                }
            }
        }
    }

    PaintElementUndoableAction (const PaintElementUndoableAction&);
    PaintElementUndoableAction& operator= (const PaintElementUndoableAction&);
};