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 "RemoteAccessible.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 getImagePositionCB(AtkImage* aImage, gint* aAccX, gint* aAccY,
  23                                AtkCoordType aCoordType) {
  24   nsIntPoint pos = nsIntPoint(-1, -1);
  25   uint32_t geckoCoordType =
  26       (aCoordType == ATK_XY_WINDOW)
  27           ? nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE
  28           : nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
  29
  30   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aImage));
  31   if (accWrap && accWrap->IsImage()) {
  32     ImageAccessible* image = accWrap->AsImage();
  33     pos = image->Position(geckoCoordType);
  34   } else if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aImage))) {
  35     pos = proxy->ImagePosition(geckoCoordType);
  36   }
  37
  38   *aAccX = pos.x;
  39   *aAccY = pos.y;
  40 }
  41
  42 static const gchar* getImageDescriptionCB(AtkImage* aImage) {
  43   return getDescriptionCB(ATK_OBJECT(aImage));
  44 }
  45
  46 static void getImageSizeCB(AtkImage* aImage, gint* aAccWidth,
  47                            gint* aAccHeight) {
  48   nsIntSize size = nsIntSize(-1, -1);
  49   AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aImage));
  50   if (accWrap && accWrap->IsImage()) {
  51     size = accWrap->AsImage()->Size();
  52   } else if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aImage))) {
  53     size = proxy->ImageSize();
  54   }
  55
  56   *aAccWidth = size.width;
  57   *aAccHeight = size.height;
  58 }
  59
  60 }  // extern "C"
  61
  62 void imageInterfaceInitCB(AtkImageIface* aIface) {
  63   NS_ASSERTION(aIface, "no interface!");
  64   if (MOZ_UNLIKELY(!aIface)) return;
  65
  66   aIface->get_image_position = getImagePositionCB;
  67   aIface->get_image_description = getImageDescriptionCB;
  68   aIface->get_image_size = getImageSizeCB;
  69 }