/*
 * Copyright 2006-2010, Stephan Aßmus <superstippi@gmx.de>.
 * All rights reserved. Distributed under the terms of the MIT License.
 */


#include "TransformGradientCommand.h"

#include <new>
#include <stdio.h>

#include "GradientTransformable.h"


using std::nothrow;


TransformGradientCommand::TransformGradientCommand(TransformBox* box,
                Gradient* gradient, BPoint pivot, BPoint translation, double rotation,
                double xScale, double yScale, const char* name)
        :
        TransformCommand(pivot, translation, rotation, xScale, yScale, name),
        fTransformBox(box),
        fGradient(gradient)
{
        if (fGradient == NULL)
                return;

        fGradient->AcquireReference();

        if (fTransformBox != NULL)
                fTransformBox->AddListener(this);
}


TransformGradientCommand::~TransformGradientCommand()
{
        if (fGradient != NULL)
                fGradient->ReleaseReference();

        if (fTransformBox != NULL)
                fTransformBox->RemoveListener(this);
}


status_t
TransformGradientCommand::InitCheck()
{
        return fGradient != NULL ? TransformCommand::InitCheck() : B_NO_INIT;
}

// #pragma mark -

// TransformBoxDeleted
void
TransformGradientCommand::TransformBoxDeleted(const TransformBox* box)
{
        if (fTransformBox == box) {
                if (fTransformBox != NULL)
                        fTransformBox->RemoveListener(this);
                fTransformBox = NULL;
        }
}


// #pragma mark -


status_t
TransformGradientCommand::_SetTransformation(BPoint pivot, BPoint translation,
        double rotation, double xScale, double yScale) const
{
        if (fTransformBox) {
                fTransformBox->SetTransformation(pivot, translation, rotation, xScale,
                        yScale);
                return B_OK;
        }

        ChannelTransform transform;
        transform.SetTransformation(pivot, translation, rotation, xScale, yScale);

        // Reset and apply transformation. (Gradients never have an original
        // transformation that needs to be taken into account, the box always
        // assignes it completely.)
        fGradient->Reset();
        fGradient->Multiply(transform);

        return B_OK;
}