accessible/android/RootAccessibleWrap.cpp

   1 /* -*- Mode: c++; c-basic-offset: 2; tab-width: 20; indent-tabs-mode: nil; -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "RootAccessibleWrap.h"
   7
   8 #include "LocalAccessible-inl.h"
   9
  10 #include "DocAccessibleParent.h"
  11 #include "DocAccessible-inl.h"
  12 #include "RemoteAccessibleWrap.h"
  13 #include "SessionAccessibility.h"
  14 #include "mozilla/PresShell.h"
  15
  16 using namespace mozilla;
  17 using namespace mozilla::a11y;
  18
  19 RootAccessibleWrap::RootAccessibleWrap(dom::Document* aDoc,
  20                                        PresShell* aPresShell)
  21     : RootAccessible(aDoc, aPresShell) {}
  22
  23 RootAccessibleWrap::~RootAccessibleWrap() {}
  24
  25 AccessibleWrap* RootAccessibleWrap::GetContentAccessible() {
  26   if (RemoteAccessible* proxy = GetPrimaryRemoteTopLevelContentDoc()) {
  27     return WrapperFor(proxy);
  28   }
  29
  30   // Find first document that is not defunct or hidden.
  31   // This is exclusively for Fennec which has a deck of browser elements.
  32   // Otherwise, standard GeckoView will only have one browser element.
  33   for (size_t i = 0; i < ChildDocumentCount(); i++) {
  34     DocAccessible* childDoc = GetChildDocumentAt(i);
  35     if (childDoc && !childDoc->IsDefunct() && !childDoc->IsHidden()) {
  36       return childDoc;
  37     }
  38   }
  39
  40   return nullptr;
  41 }
  42
  43 AccessibleWrap* RootAccessibleWrap::FindAccessibleById(int32_t aID) {
  44   AccessibleWrap* contentAcc = GetContentAccessible();
  45
  46   if (!contentAcc) {
  47     return nullptr;
  48   }
  49
  50   if (aID == AccessibleWrap::kNoID) {
  51     return contentAcc;
  52   }
  53
  54   if (contentAcc->IsProxy()) {
  55     return FindAccessibleById(static_cast<DocRemoteAccessibleWrap*>(contentAcc),
  56                               aID);
  57   }
  58
  59   return FindAccessibleById(
  60       static_cast<DocAccessibleWrap*>(contentAcc->AsDoc()), aID);
  61 }
  62
  63 AccessibleWrap* RootAccessibleWrap::FindAccessibleById(
  64     DocRemoteAccessibleWrap* aDoc, int32_t aID) {
  65   AccessibleWrap* acc = aDoc->GetAccessibleByID(aID);
  66   uint32_t index = 0;
  67   while (!acc) {
  68     auto child = static_cast<DocRemoteAccessibleWrap*>(
  69         aDoc->GetChildDocumentAt(index++));
  70     if (!child) {
  71       break;
  72     }
  73     // A child document's id is not in its parent document's hash table.
  74     if (child->VirtualViewID() == aID) {
  75       acc = child;
  76     } else {
  77       acc = FindAccessibleById(child, aID);
  78     }
  79   }
  80
  81   return acc;
  82 }
  83
  84 AccessibleWrap* RootAccessibleWrap::FindAccessibleById(DocAccessibleWrap* aDoc,
  85                                                        int32_t aID) {
  86   AccessibleWrap* acc = aDoc->GetAccessibleByID(aID);
  87   uint32_t index = 0;
  88   while (!acc) {
  89     auto child =
  90         static_cast<DocAccessibleWrap*>(aDoc->GetChildDocumentAt(index++));
  91     if (!child) {
  92       break;
  93     }
  94     acc = FindAccessibleById(child, aID);
  95   }
  96
  97   return acc;
  98 }