/* -*- 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 the Mozilla SVG project.
 *
 * The Initial Developer of the Original Code is
 * Crocodile Clips Ltd..
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Alex Fritze <alex.fritze@crocodile-clips.com> (original author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of 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 "nsSVGNumber.h"
#include "nsTextFormatter.h"
#include "prdtoa.h"
#include "nsSVGValue.h"
#include "nsISVGValueUtils.h"
#include "nsContentUtils.h"

////////////////////////////////////////////////////////////////////////
// nsSVGNumber class

class nsSVGNumber : public nsIDOMSVGNumber,
                    public nsSVGValue
{
protected:
  friend nsresult NS_NewSVGNumber(nsIDOMSVGNumber** result,
                                  float val);
  nsSVGNumber(float val);
  
public:
  // nsISupports interface:
  NS_DECL_ISUPPORTS

  // nsIDOMSVGNumber interface:
  NS_DECL_NSIDOMSVGNUMBER

  // nsISVGValue interface:
  NS_IMETHOD SetValueString(const nsAString& aValue);
  NS_IMETHOD GetValueString(nsAString& aValue);
  
protected:
  float mValue;
};

//----------------------------------------------------------------------
// implementation:

nsresult
NS_NewSVGNumber(nsIDOMSVGNumber** result, float val)
{
  *result = new nsSVGNumber(val);
  if (!*result) return NS_ERROR_OUT_OF_MEMORY;
  NS_ADDREF(*result);
  return NS_OK;
}

nsSVGNumber::nsSVGNumber(float val)
    : mValue(val)
{
}

//----------------------------------------------------------------------
// nsISupports methods:

NS_IMPL_ADDREF(nsSVGNumber)
NS_IMPL_RELEASE(nsSVGNumber)

NS_INTERFACE_MAP_BEGIN(nsSVGNumber)
  NS_INTERFACE_MAP_ENTRY(nsISVGValue)
  NS_INTERFACE_MAP_ENTRY(nsIDOMSVGNumber)
  NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(SVGNumber)
  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsISVGValue)
NS_INTERFACE_MAP_END

//----------------------------------------------------------------------
// nsISVGValue methods:

NS_IMETHODIMP
nsSVGNumber::GetValueString(nsAString& aValue)
{
  PRUnichar buf[24];
  nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(PRUnichar),
                            NS_LITERAL_STRING("%g").get(),
                            (double)mValue);
  aValue.Assign(buf);
  
  return NS_OK;
}

NS_IMETHODIMP
nsSVGNumber::SetValueString(const nsAString& aValue)
{
  nsresult rv = NS_OK;
  WillModify();
  
  NS_ConvertUTF16toUTF8 value(aValue);
  const char *str = value.get();

  if (*str) {
    char *rest;
    float val = float(PR_strtod(str, &rest));
    if (rest && rest!=str && NS_FloatIsFinite(val)) {
      if (*rest=='%') {
        rv = SetValue(val / 100.0f);
        rest++;
      } else {
        rv = SetValue(val);
      }
      // skip trailing spaces
      while (*rest && isspace(*rest))
        ++rest;

      // check to see if there is trailing stuff...
      if (*rest != '\0') {
        rv = NS_ERROR_FAILURE;
        NS_ERROR("trailing data in number value");
      }
    } else {
      rv = NS_ERROR_FAILURE;
      // no number
    }
  }
  DidModify();
  return rv;
}

//----------------------------------------------------------------------

//----------------------------------------------------------------------
// nsIDOMSVGNumber methods:

/* attribute float value; */
NS_IMETHODIMP nsSVGNumber::GetValue(float *aValue)
{
  *aValue = mValue;
  return NS_OK;
}
NS_IMETHODIMP nsSVGNumber::SetValue(float aValue)
{
  NS_ENSURE_FINITE(aValue, NS_ERROR_ILLEGAL_VALUE);
  WillModify();
  mValue = aValue;
  DidModify();
  return NS_OK;
}
