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   // Returned in screen coordinates
  35   image->GetImagePosition(geckoCoordType, aAccX, aAccY);
  36 }
  37
  38 static const gchar*
  39 getImageDescriptionCB(AtkImage* aImage)
  40 {
  41   return getDescriptionCB(ATK_OBJECT(aImage));
  42 }
  43
  44 static void
  45 getImageSizeCB(AtkImage* aImage, gint* aAccWidth, gint* aAccHeight)
  46 {
  47   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aImage));
  48   if (!accWrap || !accWrap->IsImage())
  49     return;
  50
  51   accWrap->AsImage()->GetImageSize(aAccWidth, aAccHeight);
  52 }
  53 }
  54
  55 void
  56 imageInterfaceInitCB(AtkImageIface* aIface)
  57 {
  58   NS_ASSERTION(aIface, "no interface!");
  59   if (MOZ_UNLIKELY(!aIface))
  60     return;
  61
  62   aIface->get_image_position = getImagePositionCB;
  63   aIface->get_image_description = getImageDescriptionCB;
  64   aIface->get_image_size = getImageSizeCB;
  65 }