/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla SVG Project code.
 *
 * The Initial Developer of the Original Code is the Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "SVGLengthList.h"
#include "SVGAnimatedLengthList.h"
#include "SVGLength.h"
#include "nsSVGElement.h"
#include "nsISVGValueUtils.h"
#include "nsDOMError.h"
#include "nsContentUtils.h"
#include "nsString.h"
#include "nsSVGUtils.h"
#include "string.h"

namespace mozilla {

nsresult
SVGLengthList::CopyFrom(const SVGLengthList& rhs)
{
  if (!mLengths.SetCapacity(rhs.Length())) {
    // Yes, we do want fallible alloc here
    return NS_ERROR_OUT_OF_MEMORY;
  }
  mLengths = rhs.mLengths;
  return NS_OK;
}

void
SVGLengthList::GetValueAsString(nsAString& aValue) const
{
  aValue.Truncate();
  PRUint32 last = mLengths.Length() - 1;
  for (PRUint32 i = 0; i < mLengths.Length(); ++i) {
    nsAutoString length;
    mLengths[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(' ');
    }
  }
}

static inline char* SkipWhitespace(char* str)
{
  while (IsSVGWhitespace(*str))
    ++str;
  return str;
}

nsresult
SVGLengthList::SetValueFromString(const nsAString& aValue)
{
  SVGLengthList temp;

  NS_ConvertUTF16toUTF8 value(aValue);
  char* start = SkipWhitespace(value.BeginWriting());

  // We can't use strtok with SVG_COMMA_WSP_DELIM because to correctly handle
  // invalid input in the form of two commas without a value between them, we
  // would need to know if strtok overwrote a comma or not.

  while (*start != '\0') {
    int end = strcspn(start, SVG_COMMA_WSP_DELIM);
    if (end == 0) {
      // found comma in an invalid location
      return NS_ERROR_DOM_SYNTAX_ERR;
    }
    SVGLength length;
    if (!length.SetValueFromString(NS_ConvertUTF8toUTF16(start, PRUint32(end)))) {
      return NS_ERROR_DOM_SYNTAX_ERR;
    }
    if (!temp.AppendItem(length)) {
      return NS_ERROR_OUT_OF_MEMORY;
    }
    start = SkipWhitespace(start + end);
    if (*start == ',') {
      start = SkipWhitespace(start + 1);
    }
  }

  return CopyFrom(temp);
}

PRBool
SVGLengthList::operator==(const SVGLengthList& rhs) const
{
  if (Length() != rhs.Length()) {
    return PR_FALSE;
  }
  for (PRUint32 i = 0; i < Length(); ++i) {
    if (!(mLengths[i] == rhs.mLengths[i])) {
      return PR_FALSE;
    }
  }
  return PR_TRUE;
}

} // namespace mozilla
