/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "SVGTransformList.h"

#include "SVGTransformListParser.h"

#include "nsString.h"

#include "nsError.h"

namespace mozilla {

gfxMatrix

SVGTransformList::GetConsolidationMatrix() const

{

  // To benefit from Return Value Optimization and avoid copy constructor calls

  // due to our use of return-by-value, we must return the exact same object

  // from ALL return points. This function must only return THIS variable:

  gfxMatrix result;

  if (mItems.IsEmpty())

    return result;

  result = mItems[0].GetMatrix();

  if (mItems.Length() == 1)

    return result;

  for (uint32_t i = 1; i < mItems.Length(); ++i) {

    result.PreMultiply(mItems[i].GetMatrix());

  }

  return result;

}

nsresult

SVGTransformList::CopyFrom(const SVGTransformList& rhs)

{

  return CopyFrom(rhs.mItems);

}

nsresult

SVGTransformList::CopyFrom(const nsTArray<nsSVGTransform>& aTransformArray)

{

  if (!mItems.Assign(aTransformArray, fallible)) {

    return NS_ERROR_OUT_OF_MEMORY;

  }

  return NS_OK;

}

void

SVGTransformList::GetValueAsString(nsAString& aValue) const

{

  aValue.Truncate();

  uint32_t last = mItems.Length() - 1;

  for (uint32_t i = 0; i < mItems.Length(); ++i) {

    nsAutoString length;

    mItems[i].GetValueAsString(length);

    // We ignore OOM, since it's not useful for us to return an error.

    aValue.Append(length);

    if (i != last) {

      aValue.Append(' ');

    }

  }

}

nsresult

SVGTransformList::SetValueFromString(const nsAString& aValue)

{

  SVGTransformListParser parser(aValue);

  if (!parser.Parse()) {

    // there was a parse error.

    return NS_ERROR_DOM_SYNTAX_ERR;

  }

  return CopyFrom(parser.GetTransformList());

}

} // namespace mozilla