accessible/xpcom/xpcAccessibleTableCell.h
author Nicholas Nethercote <nnethercote@mozilla.com>
Fri, 19 Aug 2016 09:03:04 +1000
changeset 335989 6a81bba012c8d4283978ae3c6920843916817bfc
parent 304664 1acf6d48e34c69a8573e32395487ef2677a5e8d2
permissions -rw-r--r--
Bug 1293596 (part 2) - Rework nsIWidget bounds getters. r=mstange. This patch makes GetBounds(), GetScreenBounds() and GetClientBounds() more obviously infallible, like existing functions such as GetNaturalBounds() and GetClientSize(). This results in clearer behaviour in nsCocoaWindow.mm if Objective C exceptions occur. Along the way, the patch removes some useless failure checks for these functions. The patch also removes the NS_IMETHOD from GetRestoredBounds and makes that function MOZ_MUST_USE.

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_a11y_xpcom_xpcAccessibletableCell_h_
#define mozilla_a11y_xpcom_xpcAccessibletableCell_h_

#include "nsIAccessibleTable.h"

#include "xpcAccessibleHyperText.h"

namespace mozilla {
namespace a11y {

/**
 * XPCOM wrapper around TableAccessibleCell class.
 */
class xpcAccessibleTableCell : public xpcAccessibleHyperText,
                               public nsIAccessibleTableCell
{
public:
  explicit xpcAccessibleTableCell(Accessible* aIntl) :
    xpcAccessibleHyperText(aIntl) { }

  xpcAccessibleTableCell(ProxyAccessible* aProxy, uint32_t aInterfaces) :
    xpcAccessibleHyperText(aProxy, aInterfaces) {}

  NS_DECL_ISUPPORTS_INHERITED

  // nsIAccessibleTableCell
  NS_IMETHOD GetTable(nsIAccessibleTable** aTable) final override;
  NS_IMETHOD GetColumnIndex(int32_t* aColIdx) final override;
  NS_IMETHOD GetRowIndex(int32_t* aRowIdx) final override;
  NS_IMETHOD GetColumnExtent(int32_t* aExtent) final override;
  NS_IMETHOD GetRowExtent(int32_t* aExtent) final override;
  NS_IMETHOD GetColumnHeaderCells(nsIArray** aHeaderCells) final override;
  NS_IMETHOD GetRowHeaderCells(nsIArray** aHeaderCells) final override;
  NS_IMETHOD IsSelected(bool* aSelected) final override;

protected:
  virtual ~xpcAccessibleTableCell() {}

private:
  TableCellAccessible* Intl()
  {
    if (Accessible* acc = mIntl.AsAccessible()) {
      return acc->AsTableCell();
    }

    return nullptr;
}

  xpcAccessibleTableCell(const xpcAccessibleTableCell&) = delete;
  xpcAccessibleTableCell& operator =(const xpcAccessibleTableCell&) = delete;
};

} // namespace a11y
} // namespace mozilla

#endif // mozilla_a11y_xpcom_xpcAccessibletableCell_h_