/* -*- 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 "mozilla/ArrayUtils.h"

#include "SVGPointList.h"

#include "nsCharSeparatedTokenizer.h"

#include "nsTextFormatter.h"

#include "SVGContentUtils.h"

namespace mozilla {

nsresult

SVGPointList::CopyFrom(const SVGPointList& rhs)

{

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

    return NS_ERROR_OUT_OF_MEMORY;

  }

  return NS_OK;

}

void

SVGPointList::GetValueAsString(nsAString& aValue) const

{

  aValue.Truncate();

  char16_t buf[50];

  uint32_t last = mItems.Length() - 1;

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

    // Would like to use aValue.AppendPrintf("%f,%f", item.mX, item.mY),

    // but it's not possible to always avoid trailing zeros.

    nsTextFormatter::snprintf(buf, ArrayLength(buf),

                              u"%g,%g",

                              double(mItems[i].mX), double(mItems[i].mY));

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

    aValue.Append(buf);

    if (i != last) {

      aValue.Append(' ');

    }

  }

}

nsresult

SVGPointList::SetValueFromString(const nsAString& aValue)

{

  // The spec says that the list is parsed and accepted up to the first error

  // encountered, so we must call CopyFrom even if an error occurs. We still

  // want to throw any error code from setAttribute if there's a problem

  // though, so we must take care to return any error code.

  nsresult rv = NS_OK;

  SVGPointList temp;

  nsCharSeparatedTokenizerTemplate<nsContentUtils::IsHTMLWhitespace>

    tokenizer(aValue, ',', nsCharSeparatedTokenizer::SEPARATOR_OPTIONAL);

  while (tokenizer.hasMoreTokens()) {

    const nsAString& token = tokenizer.nextToken();

    RangedPtr<const char16_t> iter =

      SVGContentUtils::GetStartRangedPtr(token);

    const RangedPtr<const char16_t> end =

      SVGContentUtils::GetEndRangedPtr(token);

    float x;

    if (!SVGContentUtils::ParseNumber(iter, end, x)) {

      rv = NS_ERROR_DOM_SYNTAX_ERR;

      break;

    }

    float y;

    if (iter == end) {

      if (!tokenizer.hasMoreTokens() ||

          !SVGContentUtils::ParseNumber(tokenizer.nextToken(), y)) {

        rv = NS_ERROR_DOM_SYNTAX_ERR;

        break;

      }

    } else {

      // It's possible for the token to be 10-30 which has

      // no separator but needs to be parsed as 10, -30

      const nsAString& leftOver = Substring(iter.get(), end.get());

      if (leftOver[0] != '-' || !SVGContentUtils::ParseNumber(leftOver, y)) {

        rv = NS_ERROR_DOM_SYNTAX_ERR;

        break;

      }

    }

    temp.AppendItem(SVGPoint(x, y));

  }

  if (tokenizer.separatorAfterCurrentToken()) {

    rv = NS_ERROR_DOM_SYNTAX_ERR; // trailing comma

  }

  nsresult rv2 = CopyFrom(temp);

  if (NS_FAILED(rv2)) {

    return rv2; // prioritize OOM error code over syntax errors

  }

  return rv;

}

} // namespace mozilla