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CAccessibleTableCell.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** 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.org code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Alexander Surkov <surkov.alexander@gmail.com> (original author)
 *
 * 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
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 * 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.
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 * ***** END LICENSE BLOCK ***** */

#include "CAccessibleTableCell.h"

#include "Accessible2.h"
#include "AccessibleTable2_i.c"
#include "AccessibleTableCell_i.c"

#include "nsIAccessible.h"
#include "nsIAccessibleTable.h"
#include "nsIWinAccessNode.h"
#include "nsAccessNodeWrap.h"
#include "nsWinUtils.h"

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

#define TABLECELL_INTERFACE_UNSUPPORTED_MSG \
"Subclass of CAccessibleTableCell doesn't implement nsIAccessibleTableCell"\

// IUnknown

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

  if (IID_IAccessibleTableCell == iid) {
    *ppv = static_cast<IAccessibleTableCell*>(this);
    (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
    return S_OK;
  }

  return E_NOINTERFACE;
}

////////////////////////////////////////////////////////////////////////////////
// IAccessibleTableCell

STDMETHODIMP
CAccessibleTableCell::get_table(IUnknown **table)
{
__try {
  nsCOMPtr<nsIAccessibleTableCell> tableCell(do_QueryInterface(this));
  NS_ASSERTION(tableCell, TABLECELL_INTERFACE_UNSUPPORTED_MSG);
  if (!tableCell)
    return E_FAIL;

  nsCOMPtr<nsIAccessibleTable> geckoTable;
  nsresult rv = tableCell->GetTable(getter_AddRefs(geckoTable));
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  nsCOMPtr<nsIWinAccessNode> winAccessNode = do_QueryInterface(geckoTable);
  if (!winAccessNode)
    return E_FAIL;

  void *instancePtr = NULL;
  rv = winAccessNode->QueryNativeInterface(IID_IUnknown, &instancePtr);
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  *table = static_cast<IUnknown*>(instancePtr);
  return S_OK;

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(),
                                                  GetExceptionInformation())) {}

  return E_FAIL;
}

STDMETHODIMP
CAccessibleTableCell::get_columnExtent(long *nColumnsSpanned)
{
__try {
  *nColumnsSpanned = 0;

  nsCOMPtr<nsIAccessibleTableCell> tableCell(do_QueryInterface(this));
  NS_ASSERTION(tableCell, TABLECELL_INTERFACE_UNSUPPORTED_MSG);
  if (!tableCell)
    return E_FAIL;

  PRInt32 columnsSpanned = 0;
  nsresult rv = tableCell->GetColumnExtent(&columnsSpanned);
  if (NS_SUCCEEDED(rv)) {
    *nColumnsSpanned = columnsSpanned;
    return S_OK;
  }

  return GetHRESULT(rv);

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(),
                                                  GetExceptionInformation())) {}

  return E_FAIL;
}

STDMETHODIMP
CAccessibleTableCell::get_columnHeaderCells(IUnknown ***cellAccessibles,
                                            long *nColumnHeaderCells)
{
__try {
  nsCOMPtr<nsIAccessibleTableCell> tableCell(do_QueryInterface(this));
  NS_ASSERTION(tableCell, TABLECELL_INTERFACE_UNSUPPORTED_MSG);
  if (!tableCell)
    return E_FAIL;

  nsCOMPtr<nsIArray> headerCells;
  nsresult rv = tableCell->GetColumnHeaderCells(getter_AddRefs(headerCells));  
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  return nsWinUtils::ConvertToIA2Array(headerCells, cellAccessibles,
                                       nColumnHeaderCells);

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(),
                                                  GetExceptionInformation())) {}

  return E_FAIL;
}

STDMETHODIMP
CAccessibleTableCell::get_columnIndex(long *columnIndex)
{
__try {
  *columnIndex = -1;

  nsCOMPtr<nsIAccessibleTableCell> tableCell(do_QueryInterface(this));
  NS_ASSERTION(tableCell, TABLECELL_INTERFACE_UNSUPPORTED_MSG);
  if (!tableCell)
    return E_FAIL;

  PRInt32 colIdx = -1;
  nsresult rv = tableCell->GetColumnIndex(&colIdx);
  if (NS_SUCCEEDED(rv)) {
    *columnIndex = colIdx;
    return S_OK;
  }

  return GetHRESULT(rv);

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(),
                                                  GetExceptionInformation())) {}

  return E_FAIL;
}

STDMETHODIMP
CAccessibleTableCell::get_rowExtent(long *nRowsSpanned)
{
__try {
  *nRowsSpanned = 0;

  nsCOMPtr<nsIAccessibleTableCell> tableCell(do_QueryInterface(this));
  NS_ASSERTION(tableCell, TABLECELL_INTERFACE_UNSUPPORTED_MSG);
  if (!tableCell)
    return E_FAIL;

  PRInt32 rowsSpanned = 0;
  nsresult rv = tableCell->GetRowExtent(&rowsSpanned);
  if (NS_SUCCEEDED(rv)) {
    *nRowsSpanned = rowsSpanned;
    return S_OK;
  }

  return GetHRESULT(rv);

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(),
                                                  GetExceptionInformation())) {}

  return E_FAIL;
}

STDMETHODIMP
CAccessibleTableCell::get_rowHeaderCells(IUnknown ***cellAccessibles,
                                         long *nRowHeaderCells)
{
__try {
  nsCOMPtr<nsIAccessibleTableCell> tableCell(do_QueryInterface(this));
  NS_ASSERTION(tableCell, TABLECELL_INTERFACE_UNSUPPORTED_MSG);
  if (!tableCell)
    return E_FAIL;

  nsCOMPtr<nsIArray> headerCells;
  nsresult rv = tableCell->GetRowHeaderCells(getter_AddRefs(headerCells));  
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  return nsWinUtils::ConvertToIA2Array(headerCells, cellAccessibles,
                                       nRowHeaderCells);

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(),
                                                  GetExceptionInformation())) {}

  return E_FAIL;
}

STDMETHODIMP
CAccessibleTableCell::get_rowIndex(long *rowIndex)
{
__try {
  *rowIndex = -1;

  nsCOMPtr<nsIAccessibleTableCell> tableCell(do_QueryInterface(this));
  NS_ASSERTION(tableCell, TABLECELL_INTERFACE_UNSUPPORTED_MSG);
  if (!tableCell)
    return E_FAIL;

  PRInt32 rowIdx = -1;
  nsresult rv = tableCell->GetRowIndex(&rowIdx);
  if (NS_SUCCEEDED(rv)) {
    *rowIndex = rowIdx;
    return S_OK;
  }

  return GetHRESULT(rv);

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(),
                                                  GetExceptionInformation())) {}

  return E_FAIL;
}

STDMETHODIMP
CAccessibleTableCell::get_rowColumnExtents(long *row, long *column,
                                           long *rowExtents,
                                           long *columnExtents,
                                           boolean *isSelected)
{
__try {
  *row = 0;
  *column = 0;
  *rowExtents = 0;
  *columnExtents = 0;
  *isSelected = false;

  nsCOMPtr<nsIAccessibleTableCell> tableCell(do_QueryInterface(this));
  NS_ASSERTION(tableCell, TABLECELL_INTERFACE_UNSUPPORTED_MSG);
  if (!tableCell)
    return E_FAIL;

  PRInt32 rowIdx = -1;
  nsresult rv = tableCell->GetRowIndex(&rowIdx);
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  PRInt32 columnIdx = -1;
  rv = tableCell->GetColumnIndex(&columnIdx);
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  PRInt32 spannedRows = 0;
  rv = tableCell->GetRowExtent(&spannedRows);
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  PRInt32 spannedColumns = 0;
  rv = tableCell->GetColumnExtent(&spannedColumns);
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  PRBool isSel = PR_FALSE;
  rv = tableCell->IsSelected(&isSel);
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  *row = rowIdx;
  *column = columnIdx;
  *rowExtents = spannedRows;
  *columnExtents = spannedColumns;
  *isSelected = isSel;
  return S_OK;

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

STDMETHODIMP
CAccessibleTableCell::get_isSelected(boolean *isSelected)
{
__try {
  *isSelected = false;

  nsCOMPtr<nsIAccessibleTableCell> tableCell(do_QueryInterface(this));
  NS_ASSERTION(tableCell, TABLECELL_INTERFACE_UNSUPPORTED_MSG);
  if (!tableCell)
    return E_FAIL;

  PRBool isSel = PR_FALSE;
  nsresult rv = tableCell->IsSelected(&isSel);
  if (NS_SUCCEEDED(rv)) {
    *isSelected = isSel;
    return S_OK;
  }

  return GetHRESULT(rv);

} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(),
                                                  GetExceptionInformation())) {}

  return E_FAIL;
}

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