accessible/ipc/DocAccessibleChildBase.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 "mozilla/a11y/DocAccessibleChildBase.h"
   8 #include "mozilla/a11y/ProxyAccessible.h"
   9
  10 #include "Accessible-inl.h"
  11
  12 namespace mozilla {
  13 namespace a11y {
  14
  15 /* static */
  16 uint32_t DocAccessibleChildBase::InterfacesFor(Accessible* aAcc) {
  17   uint32_t interfaces = 0;
  18   if (aAcc->IsHyperText() && aAcc->AsHyperText()->IsTextRole())
  19     interfaces |= Interfaces::HYPERTEXT;
  20
  21   if (aAcc->IsLink()) interfaces |= Interfaces::HYPERLINK;
  22
  23   if (aAcc->HasNumericValue()) interfaces |= Interfaces::VALUE;
  24
  25   if (aAcc->IsImage()) interfaces |= Interfaces::IMAGE;
  26
  27   if (aAcc->IsTable()) {
  28     interfaces |= Interfaces::TABLE;
  29   }
  30
  31   if (aAcc->IsTableCell()) interfaces |= Interfaces::TABLECELL;
  32
  33   if (aAcc->IsDoc()) interfaces |= Interfaces::DOCUMENT;
  34
  35   if (aAcc->IsSelect()) {
  36     interfaces |= Interfaces::SELECTION;
  37   }
  38
  39   if (aAcc->ActionCount()) {
  40     interfaces |= Interfaces::ACTION;
  41   }
  42
  43   return interfaces;
  44 }
  45
  46 /* static */
  47 void DocAccessibleChildBase::SerializeTree(Accessible* aRoot,
  48                                            nsTArray<AccessibleData>& aTree) {
  49   uint64_t id = reinterpret_cast<uint64_t>(aRoot->UniqueID());
  50 #if defined(XP_WIN)
  51   int32_t msaaId = AccessibleWrap::GetChildIDFor(aRoot);
  52 #endif
  53   a11y::role role = aRoot->Role();
  54   uint32_t childCount = aRoot->ChildCount();
  55   uint32_t interfaces = InterfacesFor(aRoot);
  56
  57   // OuterDocAccessibles are special because we don't want to serialize the
  58   // child doc here, we'll call PDocAccessibleConstructor in
  59   // NotificationController.
  60   MOZ_ASSERT(!aRoot->IsDoc(), "documents shouldn't be serialized");
  61   if (aRoot->IsOuterDoc()) {
  62     childCount = 0;
  63   }
  64
  65 #if defined(XP_WIN)
  66   aTree.AppendElement(AccessibleData(id, msaaId, role, childCount, interfaces));
  67 #else
  68   aTree.AppendElement(AccessibleData(id, role, childCount, interfaces));
  69 #endif
  70
  71   for (uint32_t i = 0; i < childCount; i++) {
  72     SerializeTree(aRoot->GetChildAt(i), aTree);
  73   }
  74 }
  75
  76 void DocAccessibleChildBase::InsertIntoIpcTree(Accessible* aParent,
  77                                                Accessible* aChild,
  78                                                uint32_t aIdxInParent) {
  79   uint64_t parentID =
  80       aParent->IsDoc() ? 0 : reinterpret_cast<uint64_t>(aParent->UniqueID());
  81   nsTArray<AccessibleData> shownTree;
  82   ShowEventData data(parentID, aIdxInParent, shownTree, true);
  83   SerializeTree(aChild, data.NewTree());
  84   MaybeSendShowEvent(data, false);
  85 }
  86
  87 void DocAccessibleChildBase::ShowEvent(AccShowEvent* aShowEvent) {
  88   Accessible* parent = aShowEvent->Parent();
  89   uint64_t parentID =
  90       parent->IsDoc() ? 0 : reinterpret_cast<uint64_t>(parent->UniqueID());
  91   uint32_t idxInParent = aShowEvent->GetAccessible()->IndexInParent();
  92   nsTArray<AccessibleData> shownTree;
  93   ShowEventData data(parentID, idxInParent, shownTree, false);
  94   SerializeTree(aShowEvent->GetAccessible(), data.NewTree());
  95   MaybeSendShowEvent(data, aShowEvent->IsFromUserInput());
  96 }
  97
  98 }  // namespace a11y
  99 }  // namespace mozilla