// Aseprite
// Copyright (C) 2001-2018  David Capello
//
// This program is distributed under the terms of
// the End-User License Agreement for Aseprite.

#ifdef HAVE_CONFIG_H
  #include "config.h"
#endif

#include "app/cmd/clear_rect.h"

#include "app/doc.h"
#include "doc/cel.h"
#include "doc/image.h"
#include "doc/layer.h"
#include "doc/primitives.h"

namespace app { namespace cmd {

using namespace doc;

ClearRect::ClearRect(Cel* cel, const gfx::Rect& bounds)
{
  ASSERT(cel);

  Image* image = cel->image();
  if (!image)
    return;

  m_offsetX = bounds.x - cel->x();
  m_offsetY = bounds.y - cel->y();

  gfx::Rect bounds2 = image->bounds().createIntersection(
    gfx::Rect(m_offsetX, m_offsetY, bounds.w, bounds.h));
  if (bounds.isEmpty())
    return;

  m_dstImage.reset(new WithImage(image));

  Doc* doc = static_cast<Doc*>(cel->document());
  m_bgcolor = doc->bgColor(cel->layer());

  m_copy.reset(crop_image(image, bounds2.x, bounds2.y, bounds2.w, bounds2.h, m_bgcolor));
}

void ClearRect::onExecute()
{
  m_seq.execute(context());
  if (m_dstImage)
    clear();
}

void ClearRect::onUndo()
{
  if (m_dstImage)
    restore();
  m_seq.undo();
}

void ClearRect::onRedo()
{
  m_seq.redo();
  if (m_dstImage)
    clear();
}

void ClearRect::clear()
{
  fill_rect(m_dstImage->image(),
            m_offsetX,
            m_offsetY,
            m_offsetX + m_copy->width() - 1,
            m_offsetY + m_copy->height() - 1,
            m_bgcolor);
}

void ClearRect::restore()
{
  copy_image(m_dstImage->image(), m_copy.get(), m_offsetX, m_offsetY);
}

}} // namespace app::cmd
