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CAccessibleValue.cpp

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 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
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 *
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 * for the specific language governing rights and limitations under the
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 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Alexander Surkov <surkov.alexander@gmail.com> (original author)
 *
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 * 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
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#include "CAccessibleValue.h"

#include "AccessibleValue_i.c"

#include "nsIAccessibleValue.h"

#include "nsCOMPtr.h"

#include "nsAccessNodeWrap.h"

// IUnknown

STDMETHODIMP
CAccessibleValue::QueryInterface(REFIID iid, void** ppv)
{
  *ppv = NULL;

  if (IID_IAccessibleValue == iid) {
    nsCOMPtr<nsIAccessibleValue> valueAcc(do_QueryInterface(this));
    if (!valueAcc)
      return E_NOINTERFACE;

    *ppv = static_cast<IAccessibleValue*>(this);
    (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
    return S_OK;
  }

  return E_NOINTERFACE;
}

// IAccessibleValue

STDMETHODIMP
CAccessibleValue::get_currentValue(VARIANT *aCurrentValue)
{
__try {
  VariantInit(aCurrentValue);

  nsCOMPtr<nsIAccessibleValue> valueAcc(do_QueryInterface(this));
  if (!valueAcc)
    return E_FAIL;

  double currentValue = 0;
  nsresult rv = valueAcc->GetCurrentValue(&currentValue);
  if (NS_FAILED(rv))
    return E_FAIL;

  aCurrentValue->vt = VT_R8;
  aCurrentValue->dblVal = currentValue;

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
  return NS_OK;
}

STDMETHODIMP
CAccessibleValue::setCurrentValue(VARIANT aValue)
{
__try {
  nsCOMPtr<nsIAccessibleValue> valueAcc(do_QueryInterface(this));
  if (!valueAcc)
    return E_FAIL;

  if (aValue.vt != VT_R8)
    return E_INVALIDARG;

  if (NS_SUCCEEDED(valueAcc->SetCurrentValue(aValue.dblVal)))
    return S_OK;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }

  return E_FAIL;
}

STDMETHODIMP
CAccessibleValue::get_maximumValue(VARIANT *aMaximumValue)
{
__try {
  VariantInit(aMaximumValue);

  nsCOMPtr<nsIAccessibleValue> valueAcc(do_QueryInterface(this));
  if (!valueAcc)
    return E_FAIL;

  double maximumValue = 0;
  nsresult rv = valueAcc->GetMaximumValue(&maximumValue);
  if (NS_FAILED(rv))
    return E_FAIL;

  aMaximumValue->vt = VT_R8;
  aMaximumValue->dblVal = maximumValue;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }

  return NS_OK;
}

STDMETHODIMP
CAccessibleValue::get_minimumValue(VARIANT *aMinimumValue)
{
__try {
  VariantInit(aMinimumValue);

  nsCOMPtr<nsIAccessibleValue> valueAcc(do_QueryInterface(this));
  if (!valueAcc)
    return E_FAIL;

  double minimumValue = 0;
  nsresult rv = valueAcc->GetMinimumValue(&minimumValue);
  if (NS_FAILED(rv))
    return E_FAIL;

  aMinimumValue->vt = VT_R8;
  aMinimumValue->dblVal = minimumValue;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }

  return NS_OK;
}


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