accessible/base/AccessibleOrProxy.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 "AccessibleOrProxy.h"
   8 #include "mozilla/a11y/DocAccessibleParent.h"
   9 #include "mozilla/a11y/OuterDocAccessible.h"
  10
  11 namespace mozilla {
  12 namespace a11y {
  13
  14 int32_t AccessibleOrProxy::IndexInParent() const {
  15   if (IsAccessible()) {
  16     return AsAccessible()->IndexInParent();
  17   }
  18
  19   RemoteAccessible* proxy = AsProxy();
  20   if (!proxy) {
  21     return -1;
  22   }
  23
  24   if (proxy->RemoteParent()) {
  25     return proxy->IndexInParent();
  26   }
  27
  28   if (proxy->OuterDocOfRemoteBrowser()) {
  29     return 0;
  30   }
  31
  32   MOZ_ASSERT_UNREACHABLE("Proxy should have parent or outer doc.");
  33   return -1;
  34 }
  35
  36 AccessibleOrProxy AccessibleOrProxy::Parent() const {
  37   if (IsAccessible()) {
  38     return AsAccessible()->LocalParent();
  39   }
  40
  41   RemoteAccessible* proxy = AsProxy();
  42   if (!proxy) {
  43     return nullptr;
  44   }
  45
  46   if (RemoteAccessible* parent = proxy->RemoteParent()) {
  47     return parent;
  48   }
  49
  50   // Otherwise this should be the proxy for the tab's top level document.
  51   return proxy->OuterDocOfRemoteBrowser();
  52 }
  53
  54 AccessibleOrProxy AccessibleOrProxy::ChildAtPoint(
  55     int32_t aX, int32_t aY, Accessible::EWhichChildAtPoint aWhichChild) {
  56   // XXX: This implementation is silly now, but it will go away with AoP...
  57   Accessible* result = IsProxy()
  58                            ? AsProxy()->ChildAtPoint(aX, aY, aWhichChild)
  59                            : AsAccessible()->ChildAtPoint(aX, aY, aWhichChild);
  60   if (!result) {
  61     return nullptr;
  62   }
  63
  64   if (result->IsLocal()) {
  65     return result->AsLocal();
  66   }
  67
  68   if (result->IsRemote()) {
  69     return result->AsRemote();
  70   }
  71
  72   return nullptr;
  73 }
  74
  75 RemoteAccessible* AccessibleOrProxy::RemoteChildDoc() const {
  76   MOZ_ASSERT(!IsNull());
  77   if (IsProxy()) {
  78     return nullptr;
  79   }
  80   OuterDocAccessible* outerDoc = AsAccessible()->AsOuterDoc();
  81   if (!outerDoc) {
  82     return nullptr;
  83   }
  84   return outerDoc->RemoteChildDoc();
  85 }
  86
  87 }  // namespace a11y
  88 }  // namespace mozilla