/*
 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
 *           (C) 2000 Antti Koivisto (koivisto@kde.org)
 *           (C) 2000 Dirk Mueller (mueller@kde.org)
 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#pragma once

#include "CompositeOperation.h"
#include "FloatSize.h"
#include "TransformationMatrix.h"
#include <wtf/Optional.h>
#include <wtf/PassRefPtr.h>
#include <wtf/Ref.h>
#include <wtf/RefCounted.h>

namespace WebCore {

struct BlendingContext;

class TransformOperation : public RefCounted<TransformOperation> {
public:
    enum OperationType {
        SCALE_X, SCALE_Y, SCALE, 
        TRANSLATE_X, TRANSLATE_Y, TRANSLATE, 
        ROTATE_X, ROTATE_Y, ROTATE,
		SKEW_X, SKEW_Y, SKEW,
        MATRIX,
        SCALE_Z, SCALE_3D,
        TRANSLATE_Z, TRANSLATE_3D,
        ROTATE_Z, ROTATE_3D,
        MATRIX_3D,
        PERSPECTIVE,
        IDENTITY, NONE
    };

    virtual ~TransformOperation() = default;

    virtual bool operator==(const TransformOperation&) const = 0;
    bool operator!=(const TransformOperation& o) const { return !(*this == o); }

    virtual bool isIdentity() const = 0;

    // Return true if the borderBoxSize was used in the computation, false otherwise.
    virtual bool apply(TransformationMatrix&, const FloatSize& borderBoxSize) const = 0;

    virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, const BlendingContext&, bool blendToIdentity = false) = 0;

    OperationType type() const { return m_type; }
    bool isSameType(const TransformOperation& o) const { return o.type() == m_type; }

    virtual OperationType primitiveType() const { return m_type; }
    Optional<OperationType> sharedPrimitiveType(OperationType other) const;
    Optional<OperationType> sharedPrimitiveType(const TransformOperation* other) const;

    virtual bool isAffectedByTransformOrigin() const { return false; }
    
    bool is3DOperation() const
    {
        OperationType opType = type();
        return opType == SCALE_Z ||
               opType == SCALE_3D ||
               opType == TRANSLATE_Z ||
               opType == TRANSLATE_3D ||
               opType == ROTATE_X ||
               opType == ROTATE_Y ||
               opType == ROTATE_3D ||
               opType == MATRIX_3D ||
               opType == PERSPECTIVE;
    }

    virtual bool isRepresentableIn2D() const { return true; }

    bool isRotateTransformOperationType() const
    {
        return type() == ROTATE_X || type() == ROTATE_Y || type() == ROTATE_Z || type() == ROTATE || type() == ROTATE_3D;
    }

    bool isScaleTransformOperationType() const
    {
        return type() == SCALE_X || type() == SCALE_Y || type() == SCALE_Z || type() == SCALE || type() == SCALE_3D;
    }

    bool isSkewTransformOperationType() const
    {
        return type() == SKEW_X || type() == SKEW_Y || type() == SKEW;
    }

    bool isTranslateTransformOperationType() const
    {
        return type() == TRANSLATE_X || type() == TRANSLATE_Y || type() == TRANSLATE_Z || type() == TRANSLATE || type() == TRANSLATE_3D;
    }

protected:
    TransformOperation(OperationType type)
	: m_type(type)
	{
	}

    OperationType m_type;
};

//#define TRANSFORMOPERATION_TYPE_CASTS(ToValueTypeName, predicate) \
//    TYPE_CASTS_BASE(ToValueTypeName, WebCore::TransformOperation, value, value->predicate, value.predicate)

} // namespace WebCore
