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 "mozilla/a11y/Accessible.h"
  11 #include "mozilla/Likely.h"
  12 #include "nsMai.h"
  13 #include "nsIAccessibleTypes.h"
  14
  15 using namespace mozilla;
  16 using namespace mozilla::a11y;
  17
  18 extern "C" {
  19 const gchar* getDescriptionCB(AtkObject* aAtkObj);
  20
  21 static void getImagePositionCB(AtkImage* aImage, gint* aAccX, gint* aAccY,
  22                                AtkCoordType aCoordType) {
  23   LayoutDeviceIntPoint pos(-1, -1);
  24   uint32_t geckoCoordType =
  25       (aCoordType == ATK_XY_WINDOW)
  26           ? nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE
  27           : nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
  28
  29   if (Accessible* acc = GetInternalObj(ATK_OBJECT(aImage))) {
  30     pos = acc->Position(geckoCoordType);
  31   }
  32
  33   *aAccX = pos.x;
  34   *aAccY = pos.y;
  35 }
  36
  37 static const gchar* getImageDescriptionCB(AtkImage* aImage) {
  38   return getDescriptionCB(ATK_OBJECT(aImage));
  39 }
  40
  41 static void getImageSizeCB(AtkImage* aImage, gint* aAccWidth,
  42                            gint* aAccHeight) {
  43   LayoutDeviceIntSize size(-1, -1);
  44   if (Accessible* acc = GetInternalObj(ATK_OBJECT(aImage))) {
  45     size = acc->Size();
  46   }
  47
  48   *aAccWidth = size.width;
  49   *aAccHeight = size.height;
  50 }
  51
  52 }  // extern "C"
  53
  54 void imageInterfaceInitCB(AtkImageIface* aIface) {
  55   NS_ASSERTION(aIface, "no interface!");
  56   if (MOZ_UNLIKELY(!aIface)) return;
  57
  58   aIface->get_image_position = getImagePositionCB;
  59   aIface->get_image_description = getImageDescriptionCB;
  60   aIface->get_image_size = getImageSizeCB;
  61 }