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The Tor Browser
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ia2AccessibleImage.cpp (2118B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim:expandtab:shiftwidth=2:tabstop=2:
      3 */
      4 /* This Source Code Form is subject to the terms of the Mozilla Public
      5 * License, v. 2.0. If a copy of the MPL was not distributed with this
      6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      7 
      8 #include "ia2AccessibleImage.h"
      9 
     10 #include "AccessibleImage_i.c"
     11 
     12 #include "ImageAccessible.h"
     13 #include "IUnknownImpl.h"
     14 #include "nsIAccessibleTypes.h"
     15 
     16 #include "nsString.h"
     17 
     18 using namespace mozilla;
     19 using namespace mozilla::a11y;
     20 
     21 // IUnknown
     22 IMPL_IUNKNOWN_QUERY_HEAD(ia2AccessibleImage)
     23 IMPL_IUNKNOWN_QUERY_IFACE(IAccessibleImage)
     24 IMPL_IUNKNOWN_QUERY_TAIL_INHERITED(MsaaAccessible)
     25 
     26 // IAccessibleImage
     27 
     28 STDMETHODIMP
     29 ia2AccessibleImage::get_description(BSTR* aDescription) {
     30  if (!aDescription) return E_INVALIDARG;
     31 
     32  *aDescription = nullptr;
     33 
     34  Accessible* acc = Acc();
     35  if (!acc) return CO_E_OBJNOTCONNECTED;
     36 
     37  nsAutoString description;
     38  acc->Name(description);
     39  if (description.IsEmpty()) return S_FALSE;
     40 
     41  *aDescription = ::SysAllocStringLen(description.get(), description.Length());
     42  return *aDescription ? S_OK : E_OUTOFMEMORY;
     43 }
     44 
     45 STDMETHODIMP
     46 ia2AccessibleImage::get_imagePosition(enum IA2CoordinateType aCoordType,
     47                                      long* aX, long* aY) {
     48  if (!aX || !aY) return E_INVALIDARG;
     49 
     50  *aX = 0;
     51  *aY = 0;
     52 
     53  Accessible* acc = Acc();
     54  if (!acc) return CO_E_OBJNOTCONNECTED;
     55 
     56  uint32_t geckoCoordType =
     57      (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE)
     58          ? nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE
     59          : nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
     60 
     61  LayoutDeviceIntPoint pos = acc->Position(geckoCoordType);
     62  *aX = pos.x;
     63  *aY = pos.y;
     64  return S_OK;
     65 }
     66 
     67 STDMETHODIMP
     68 ia2AccessibleImage::get_imageSize(long* aHeight, long* aWidth) {
     69  if (!aHeight || !aWidth) return E_INVALIDARG;
     70 
     71  *aHeight = 0;
     72  *aWidth = 0;
     73 
     74  Accessible* acc = Acc();
     75  if (!acc) return CO_E_OBJNOTCONNECTED;
     76 
     77  LayoutDeviceIntSize size = acc->Size();
     78  *aHeight = size.width;
     79  *aWidth = size.height;
     80  return S_OK;
     81 }