accessible/atk/nsMaiInterfaceImage.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "InterfaceInitFuncs.h"
   8
   9 #include "AccessibleWrap.h"
  10 #include "ImageAccessible.h"
  11 #include "mozilla/Likely.h"
  12 #include "nsMai.h"
  13 #include "nsIAccessibleTypes.h"
  14 #include "nsIURI.h"
  15
  16 using namespace mozilla;
  17 using namespace mozilla::a11y;
  18
  19 extern "C" {
  20 const gchar* getDescriptionCB(AtkObject* aAtkObj);
  21
  22 static void
  23 getImagePositionCB(AtkImage* aImage, gint* aAccX, gint* aAccY,
  24                    AtkCoordType aCoordType)
  25 {
  26   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aImage));
  27   if (!accWrap || !accWrap->IsImage())
  28     return;
  29
  30   ImageAccessible* image = accWrap->AsImage();
  31   uint32_t geckoCoordType = (aCoordType == ATK_XY_WINDOW) ?
  32     nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE :
  33     nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
  34   nsIntPoint pos = image->Position(geckoCoordType);
  35   *aAccX = pos.x;
  36   *aAccY = pos.y;
  37 }
  38
  39 static const gchar*
  40 getImageDescriptionCB(AtkImage* aImage)
  41 {
  42   return getDescriptionCB(ATK_OBJECT(aImage));
  43 }
  44
  45 static void
  46 getImageSizeCB(AtkImage* aImage, gint* aAccWidth, gint* aAccHeight)
  47 {
  48   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aImage));
  49   if (!accWrap || !accWrap->IsImage())
  50     return;
  51
  52   nsIntSize size = accWrap->AsImage()->Size();
  53   *aAccWidth = size.width;
  54   *aAccHeight = size.height;
  55 }
  56
  57 } // extern "C"
  58
  59 void
  60 imageInterfaceInitCB(AtkImageIface* aIface)
  61 {
  62   NS_ASSERTION(aIface, "no interface!");
  63   if (MOZ_UNLIKELY(!aIface))
  64     return;
  65
  66   aIface->get_image_position = getImagePositionCB;
  67   aIface->get_image_description = getImageDescriptionCB;
  68   aIface->get_image_size = getImageSizeCB;
  69 }