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CAccessibleEditableText.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
 * the License. You may obtain a copy of the License at
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 *
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 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Alexander Surkov <surkov.alexander@gmail.com> (original author)
 *
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 * 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 "CAccessibleEditableText.h"

#include "nsIAccessibleEditableText.h"
#include "AccessibleEditableText_i.c"
#include "nsAccessNodeWrap.h"

#include "nsCOMPtr.h"
#include "nsString.h"

#define GET_NSIACCESSIBLEEDITABLETEXT \
nsCOMPtr<nsIAccessibleEditableText> textAcc(do_QueryInterface(this));\
NS_ASSERTION(textAcc,\
             "Subclass of CAccessibleEditableText doesn't implement nsIAccessibleEditableText");\
if (!textAcc)\
  return E_FAIL;\

// IUnknown

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

  if (IID_IAccessibleEditableText == iid) {
    nsCOMPtr<nsIAccessibleEditableText> editTextAcc(do_QueryInterface(this));
    if (!editTextAcc)
      return E_NOINTERFACE;
    *ppv = static_cast<IAccessibleEditableText*>(this);
    (reinterpret_cast<IUnknown*>(*ppv))->AddRef(); 
    return S_OK;
  }

  return E_NOINTERFACE;
}

// IAccessibleEditableText

STDMETHODIMP
CAccessibleEditableText::copyText(long aStartOffset, long aEndOffset)
{
__try {
  GET_NSIACCESSIBLEEDITABLETEXT

  nsresult rv = textAcc->CopyText(aStartOffset, aEndOffset);
  if (NS_SUCCEEDED(rv))
    return S_OK;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }

  return E_FAIL;
}

STDMETHODIMP
CAccessibleEditableText::deleteText(long aStartOffset, long aEndOffset)
{
__try {
  GET_NSIACCESSIBLEEDITABLETEXT

  nsresult rv = textAcc->DeleteText(aStartOffset, aEndOffset);
  if (NS_SUCCEEDED(rv))
    return S_OK;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }

  return E_FAIL;
}

STDMETHODIMP
CAccessibleEditableText::insertText(long aOffset, BSTR *aText)
{
__try {
  GET_NSIACCESSIBLEEDITABLETEXT

  PRUint32 length = ::SysStringLen(*aText);
  nsAutoString text(*aText, length);

  nsresult rv = textAcc->InsertText(text, aOffset);
  if (NS_SUCCEEDED(rv))
    return S_OK;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }

  return E_FAIL;
}

STDMETHODIMP
CAccessibleEditableText::cutText(long aStartOffset, long aEndOffset)
{
__try {
  GET_NSIACCESSIBLEEDITABLETEXT

  nsresult rv = textAcc->CutText(aStartOffset, aEndOffset);
  if (NS_SUCCEEDED(rv))
    return S_OK;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }

  return E_FAIL;
}

STDMETHODIMP
CAccessibleEditableText::pasteText(long aOffset)
{
__try {
  GET_NSIACCESSIBLEEDITABLETEXT

  nsresult rv = textAcc->PasteText(aOffset);
  if (NS_SUCCEEDED(rv))
    return S_OK;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }

  return E_FAIL;
}

STDMETHODIMP
CAccessibleEditableText::replaceText(long aStartOffset, long aEndOffset,
                                     BSTR *aText)
{
__try {
  GET_NSIACCESSIBLEEDITABLETEXT

  nsresult rv = textAcc->DeleteText(aStartOffset, aEndOffset);
  if (NS_FAILED(rv))
    return E_FAIL;

  PRUint32 length = ::SysStringLen(*aText);
  nsAutoString text(*aText, length);

  rv = textAcc->InsertText(text, aStartOffset);
  if (NS_SUCCEEDED(rv))
    return S_OK;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }

  return E_FAIL;
}

STDMETHODIMP
CAccessibleEditableText::setAttributes(long aStartOffset, long aEndOffset,
                                       BSTR *aAttributes)
{
  return E_NOTIMPL;
}

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