зеркало из https://github.com/mozilla/gecko-dev.git
2567 строки
86 KiB
C++
2567 строки
86 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "Accessible-inl.h"
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#include "AccIterator.h"
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#include "DocAccessible-inl.h"
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#include "DocAccessibleChild.h"
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#include "HTMLImageMapAccessible.h"
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#include "nsAccCache.h"
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#include "nsAccessiblePivot.h"
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#include "nsAccUtils.h"
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#include "nsEventShell.h"
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#include "nsTextEquivUtils.h"
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#include "Role.h"
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#include "RootAccessible.h"
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#include "TreeWalker.h"
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#include "xpcAccessibleDocument.h"
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#include "nsCommandManager.h"
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#include "nsContentUtils.h"
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#include "nsIMutableArray.h"
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#include "nsIDocShell.h"
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#include "mozilla/dom/Document.h"
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#include "nsPIDOMWindow.h"
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#include "nsIEditingSession.h"
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#include "nsIFrame.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsImageFrame.h"
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#include "nsIPersistentProperties2.h"
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#include "nsIServiceManager.h"
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#include "nsViewManager.h"
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#include "nsIScrollableFrame.h"
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#include "nsUnicharUtils.h"
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#include "nsIURI.h"
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#include "nsIWebNavigation.h"
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#include "nsFocusManager.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/HTMLEditor.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/TextEditor.h"
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#include "mozilla/dom/BrowserChild.h"
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#include "mozilla/dom/DocumentType.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/MutationEventBinding.h"
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#include "mozilla/dom/UserActivation.h"
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#include "HTMLElementAccessibles.h"
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using namespace mozilla;
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using namespace mozilla::a11y;
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////////////////////////////////////////////////////////////////////////////////
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// Static member initialization
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static nsStaticAtom* const kRelationAttrs[] = {nsGkAtoms::aria_labelledby,
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nsGkAtoms::aria_describedby,
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nsGkAtoms::aria_details,
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nsGkAtoms::aria_owns,
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nsGkAtoms::aria_controls,
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nsGkAtoms::aria_flowto,
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nsGkAtoms::aria_errormessage,
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nsGkAtoms::_for,
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nsGkAtoms::control};
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static const uint32_t kRelationAttrsLen = ArrayLength(kRelationAttrs);
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////////////////////////////////////////////////////////////////////////////////
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// Constructor/desctructor
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DocAccessible::DocAccessible(dom::Document* aDocument,
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PresShell* aPresShell)
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: // XXX don't pass a document to the Accessible constructor so that we
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// don't set mDoc until our vtable is fully setup. If we set mDoc before
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// setting up the vtable we will call Accessible::AddRef() but not the
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// overrides of it for subclasses. It is important to call those
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// overrides to avoid confusing leak checking machinary.
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HyperTextAccessibleWrap(nullptr, nullptr),
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// XXX aaronl should we use an algorithm for the initial cache size?
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mAccessibleCache(kDefaultCacheLength),
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mNodeToAccessibleMap(kDefaultCacheLength),
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mDocumentNode(aDocument),
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mScrollPositionChangedTicks(0),
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mLoadState(eTreeConstructionPending),
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mDocFlags(0),
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mLoadEventType(0),
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mARIAAttrOldValue{nullptr},
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mVirtualCursor(nullptr),
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mPresShell(aPresShell),
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mIPCDoc(nullptr) {
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mGenericTypes |= eDocument;
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mStateFlags |= eNotNodeMapEntry;
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mDoc = this;
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MOZ_ASSERT(mPresShell, "should have been given a pres shell");
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mPresShell->SetDocAccessible(this);
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}
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DocAccessible::~DocAccessible() {
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NS_ASSERTION(!mPresShell, "LastRelease was never called!?!");
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}
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////////////////////////////////////////////////////////////////////////////////
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// nsISupports
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NS_IMPL_CYCLE_COLLECTION_CLASS(DocAccessible)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(DocAccessible, Accessible)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNotificationController)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mVirtualCursor)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mChildDocuments)
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for (auto hashesIter = tmp->mDependentIDsHashes.Iter(); !hashesIter.Done();
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hashesIter.Next()) {
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auto dependentIDsHash = hashesIter.UserData();
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for (auto providersIter = dependentIDsHash->Iter(); !providersIter.Done();
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providersIter.Next()) {
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AttrRelProviders* providers = providersIter.UserData();
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for (int32_t provIdx = providers->Length() - 1; provIdx >= 0; provIdx--) {
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NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(
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cb, "content of dependent ids hash entry of document accessible");
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AttrRelProvider* provider = (*providers)[provIdx];
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cb.NoteXPCOMChild(provider->mContent);
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}
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}
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}
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAccessibleCache)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAnchorJumpElm)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mInvalidationList)
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for (auto it = tmp->mARIAOwnsHash.ConstIter(); !it.Done(); it.Next()) {
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nsTArray<RefPtr<Accessible>>* ar = it.UserData();
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for (uint32_t i = 0; i < ar->Length(); i++) {
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NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mARIAOwnsHash entry item");
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cb.NoteXPCOMChild(ar->ElementAt(i));
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}
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}
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DocAccessible, Accessible)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mNotificationController)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mVirtualCursor)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mChildDocuments)
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tmp->mDependentIDsHashes.Clear();
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tmp->mNodeToAccessibleMap.Clear();
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mAccessibleCache)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mAnchorJumpElm)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mInvalidationList)
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tmp->mARIAOwnsHash.Clear();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DocAccessible)
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NS_INTERFACE_MAP_ENTRY(nsIDocumentObserver)
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NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
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NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
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NS_INTERFACE_MAP_ENTRY(nsIObserver)
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NS_INTERFACE_MAP_ENTRY(nsIAccessiblePivotObserver)
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NS_INTERFACE_MAP_END_INHERITING(HyperTextAccessible)
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NS_IMPL_ADDREF_INHERITED(DocAccessible, HyperTextAccessible)
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NS_IMPL_RELEASE_INHERITED(DocAccessible, HyperTextAccessible)
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////////////////////////////////////////////////////////////////////////////////
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// nsIAccessible
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ENameValueFlag DocAccessible::Name(nsString& aName) const {
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aName.Truncate();
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if (mParent) {
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mParent->Name(aName); // Allow owning iframe to override the name
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}
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if (aName.IsEmpty()) {
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// Allow name via aria-labelledby or title attribute
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Accessible::Name(aName);
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}
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if (aName.IsEmpty()) {
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Title(aName); // Try title element
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}
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if (aName.IsEmpty()) { // Last resort: use URL
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URL(aName);
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}
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return eNameOK;
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}
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// Accessible public method
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role DocAccessible::NativeRole() const {
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nsCOMPtr<nsIDocShell> docShell = nsCoreUtils::GetDocShellFor(mDocumentNode);
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if (docShell) {
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nsCOMPtr<nsIDocShellTreeItem> sameTypeRoot;
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docShell->GetInProcessSameTypeRootTreeItem(getter_AddRefs(sameTypeRoot));
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int32_t itemType = docShell->ItemType();
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if (sameTypeRoot == docShell) {
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// Root of content or chrome tree
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if (itemType == nsIDocShellTreeItem::typeChrome)
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return roles::CHROME_WINDOW;
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if (itemType == nsIDocShellTreeItem::typeContent) {
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return roles::DOCUMENT;
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}
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} else if (itemType == nsIDocShellTreeItem::typeContent) {
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return roles::DOCUMENT;
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}
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}
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return roles::PANE; // Fall back;
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}
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void DocAccessible::Description(nsString& aDescription) {
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if (mParent) mParent->Description(aDescription);
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if (HasOwnContent() && aDescription.IsEmpty()) {
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nsTextEquivUtils::GetTextEquivFromIDRefs(this, nsGkAtoms::aria_describedby,
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aDescription);
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}
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}
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// Accessible public method
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uint64_t DocAccessible::NativeState() const {
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// Document is always focusable.
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uint64_t state =
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states::FOCUSABLE; // keep in sync with NativeInteractiveState() impl
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if (FocusMgr()->IsFocused(this)) state |= states::FOCUSED;
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// Expose stale state until the document is ready (DOM is loaded and tree is
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// constructed).
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if (!HasLoadState(eReady)) state |= states::STALE;
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// Expose state busy until the document and all its subdocuments is completely
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// loaded.
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if (!HasLoadState(eCompletelyLoaded)) state |= states::BUSY;
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nsIFrame* frame = GetFrame();
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if (!frame || !frame->IsVisibleConsideringAncestors(
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nsIFrame::VISIBILITY_CROSS_CHROME_CONTENT_BOUNDARY)) {
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state |= states::INVISIBLE | states::OFFSCREEN;
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}
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RefPtr<TextEditor> textEditor = GetEditor();
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state |= textEditor ? states::EDITABLE : states::READONLY;
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return state;
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}
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uint64_t DocAccessible::NativeInteractiveState() const {
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// Document is always focusable.
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return states::FOCUSABLE;
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}
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bool DocAccessible::NativelyUnavailable() const { return false; }
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// Accessible public method
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void DocAccessible::ApplyARIAState(uint64_t* aState) const {
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// Grab states from content element.
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if (mContent) Accessible::ApplyARIAState(aState);
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// Allow iframe/frame etc. to have final state override via ARIA.
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if (mParent) mParent->ApplyARIAState(aState);
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}
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already_AddRefed<nsIPersistentProperties> DocAccessible::Attributes() {
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nsCOMPtr<nsIPersistentProperties> attributes =
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HyperTextAccessibleWrap::Attributes();
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// No attributes if document is not attached to the tree or if it's a root
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// document.
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if (!mParent || IsRoot()) return attributes.forget();
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// Override ARIA object attributes from outerdoc.
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aria::AttrIterator attribIter(mParent->GetContent());
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nsAutoString name, value, unused;
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while (attribIter.Next(name, value))
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attributes->SetStringProperty(NS_ConvertUTF16toUTF8(name), value, unused);
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return attributes.forget();
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}
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Accessible* DocAccessible::FocusedChild() {
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// Return an accessible for the current global focus, which does not have to
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// be contained within the current document.
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return FocusMgr()->FocusedAccessible();
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}
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void DocAccessible::TakeFocus() const {
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// Focus the document.
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nsFocusManager* fm = nsFocusManager::GetFocusManager();
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RefPtr<dom::Element> newFocus;
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dom::AutoHandlingUserInputStatePusher inputStatePusher(true);
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fm->MoveFocus(mDocumentNode->GetWindow(), nullptr,
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nsFocusManager::MOVEFOCUS_ROOT, 0, getter_AddRefs(newFocus));
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}
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// HyperTextAccessible method
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already_AddRefed<TextEditor> DocAccessible::GetEditor() const {
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// Check if document is editable (designMode="on" case). Otherwise check if
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// the html:body (for HTML document case) or document element is editable.
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if (!mDocumentNode->HasFlag(NODE_IS_EDITABLE) &&
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(!mContent || !mContent->HasFlag(NODE_IS_EDITABLE)))
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return nullptr;
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nsCOMPtr<nsIDocShell> docShell = mDocumentNode->GetDocShell();
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if (!docShell) {
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return nullptr;
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}
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nsCOMPtr<nsIEditingSession> editingSession;
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docShell->GetEditingSession(getter_AddRefs(editingSession));
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if (!editingSession) return nullptr; // No editing session interface
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RefPtr<HTMLEditor> htmlEditor =
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editingSession->GetHTMLEditorForWindow(mDocumentNode->GetWindow());
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if (!htmlEditor) {
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return nullptr;
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}
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bool isEditable = false;
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htmlEditor->GetIsDocumentEditable(&isEditable);
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if (isEditable) {
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return htmlEditor.forget();
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}
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return nullptr;
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}
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// DocAccessible public method
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void DocAccessible::URL(nsAString& aURL) const {
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nsCOMPtr<nsISupports> container = mDocumentNode->GetContainer();
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nsCOMPtr<nsIWebNavigation> webNav(do_GetInterface(container));
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nsAutoCString theURL;
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if (webNav) {
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nsCOMPtr<nsIURI> pURI;
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webNav->GetCurrentURI(getter_AddRefs(pURI));
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if (pURI) pURI->GetSpec(theURL);
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}
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CopyUTF8toUTF16(theURL, aURL);
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}
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void DocAccessible::DocType(nsAString& aType) const {
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dom::DocumentType* docType = mDocumentNode->GetDoctype();
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if (docType) docType->GetPublicId(aType);
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}
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////////////////////////////////////////////////////////////////////////////////
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// Accessible
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void DocAccessible::Init() {
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#ifdef A11Y_LOG
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if (logging::IsEnabled(logging::eDocCreate))
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logging::DocCreate("document initialize", mDocumentNode, this);
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#endif
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// Initialize notification controller.
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mNotificationController = new NotificationController(this, mPresShell);
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// Mark the document accessible as loaded if its DOM document was loaded at
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// this point (this can happen because a11y is started late or DOM document
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// having no container was loaded.
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if (mDocumentNode->GetReadyStateEnum() == dom::Document::READYSTATE_COMPLETE)
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mLoadState |= eDOMLoaded;
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AddEventListeners();
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}
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void DocAccessible::Shutdown() {
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if (!mPresShell) { // already shutdown
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return;
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}
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#ifdef A11Y_LOG
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if (logging::IsEnabled(logging::eDocDestroy))
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logging::DocDestroy("document shutdown", mDocumentNode, this);
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#endif
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// Mark the document as shutdown before AT is notified about the document
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// removal from its container (valid for root documents on ATK and due to
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// some reason for MSAA, refer to bug 757392 for details).
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mStateFlags |= eIsDefunct;
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if (mNotificationController) {
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mNotificationController->Shutdown();
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mNotificationController = nullptr;
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}
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RemoveEventListeners();
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if (mParent) {
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DocAccessible* parentDocument = mParent->Document();
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if (parentDocument) parentDocument->RemoveChildDocument(this);
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mParent->RemoveChild(this);
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MOZ_ASSERT(!mParent, "Parent has to be null!");
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}
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// Walk the array backwards because child documents remove themselves from the
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// array as they are shutdown.
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int32_t childDocCount = mChildDocuments.Length();
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for (int32_t idx = childDocCount - 1; idx >= 0; idx--)
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mChildDocuments[idx]->Shutdown();
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mChildDocuments.Clear();
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// XXX thinking about ordering?
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if (mIPCDoc) {
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MOZ_ASSERT(IPCAccessibilityActive());
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mIPCDoc->Shutdown();
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MOZ_ASSERT(!mIPCDoc);
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}
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if (mVirtualCursor) {
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mVirtualCursor->RemoveObserver(this);
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mVirtualCursor = nullptr;
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}
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mPresShell->SetDocAccessible(nullptr);
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mPresShell = nullptr; // Avoid reentrancy
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mDependentIDsHashes.Clear();
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mNodeToAccessibleMap.Clear();
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mAnchorJumpElm = nullptr;
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mInvalidationList.Clear();
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for (auto iter = mAccessibleCache.Iter(); !iter.Done(); iter.Next()) {
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Accessible* accessible = iter.Data();
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MOZ_ASSERT(accessible);
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if (accessible && !accessible->IsDefunct()) {
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// Unlink parent to avoid its cleaning overhead in shutdown.
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accessible->mParent = nullptr;
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accessible->Shutdown();
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}
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iter.Remove();
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}
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HyperTextAccessibleWrap::Shutdown();
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GetAccService()->NotifyOfDocumentShutdown(this, mDocumentNode);
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mDocumentNode = nullptr;
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}
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nsIFrame* DocAccessible::GetFrame() const {
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nsIFrame* root = nullptr;
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if (mPresShell) {
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root = mPresShell->GetRootFrame();
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}
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return root;
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}
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// DocAccessible protected member
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nsRect DocAccessible::RelativeBounds(nsIFrame** aRelativeFrame) const {
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*aRelativeFrame = GetFrame();
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dom::Document* document = mDocumentNode;
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dom::Document* parentDoc = nullptr;
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nsRect bounds;
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while (document) {
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PresShell* presShell = document->GetPresShell();
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if (!presShell) {
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return nsRect();
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}
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nsRect scrollPort;
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nsIScrollableFrame* sf = presShell->GetRootScrollFrameAsScrollable();
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if (sf) {
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scrollPort = sf->GetScrollPortRect();
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} else {
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nsIFrame* rootFrame = presShell->GetRootFrame();
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if (!rootFrame) return nsRect();
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scrollPort = rootFrame->GetRect();
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}
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if (parentDoc) { // After first time thru loop
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// XXXroc bogus code! scrollPort is relative to the viewport of
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// this document, but we're intersecting rectangles derived from
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// multiple documents and assuming they're all in the same coordinate
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// system. See bug 514117.
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bounds.IntersectRect(scrollPort, bounds);
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} else { // First time through loop
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bounds = scrollPort;
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}
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document = parentDoc = document->GetInProcessParentDocument();
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}
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return bounds;
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}
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// DocAccessible protected member
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nsresult DocAccessible::AddEventListeners() {
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nsCOMPtr<nsIDocShell> docShell(mDocumentNode->GetDocShell());
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|
|
|
// We want to add a command observer only if the document is content and has
|
|
// an editor.
|
|
if (docShell->ItemType() == nsIDocShellTreeItem::typeContent) {
|
|
RefPtr<nsCommandManager> commandManager = docShell->GetCommandManager();
|
|
if (commandManager)
|
|
commandManager->AddCommandObserver(this, "obs_documentCreated");
|
|
}
|
|
|
|
SelectionMgr()->AddDocSelectionListener(mPresShell);
|
|
|
|
// Add document observer.
|
|
mDocumentNode->AddObserver(this);
|
|
return NS_OK;
|
|
}
|
|
|
|
// DocAccessible protected member
|
|
nsresult DocAccessible::RemoveEventListeners() {
|
|
// Remove listeners associated with content documents
|
|
// Remove scroll position listener
|
|
RemoveScrollListener();
|
|
|
|
NS_ASSERTION(mDocumentNode, "No document during removal of listeners.");
|
|
|
|
if (mDocumentNode) {
|
|
mDocumentNode->RemoveObserver(this);
|
|
|
|
nsCOMPtr<nsIDocShell> docShell(mDocumentNode->GetDocShell());
|
|
NS_ASSERTION(docShell, "doc should support nsIDocShellTreeItem.");
|
|
|
|
if (docShell) {
|
|
if (docShell->ItemType() == nsIDocShellTreeItem::typeContent) {
|
|
RefPtr<nsCommandManager> commandManager = docShell->GetCommandManager();
|
|
if (commandManager) {
|
|
commandManager->RemoveCommandObserver(this, "obs_documentCreated");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mScrollWatchTimer) {
|
|
mScrollWatchTimer->Cancel();
|
|
mScrollWatchTimer = nullptr;
|
|
NS_RELEASE_THIS(); // Kung fu death grip
|
|
}
|
|
|
|
SelectionMgr()->RemoveDocSelectionListener(mPresShell);
|
|
return NS_OK;
|
|
}
|
|
|
|
void DocAccessible::ScrollTimerCallback(nsITimer* aTimer, void* aClosure) {
|
|
DocAccessible* docAcc = reinterpret_cast<DocAccessible*>(aClosure);
|
|
|
|
if (docAcc) {
|
|
docAcc->DispatchScrollingEvent(nsIAccessibleEvent::EVENT_SCROLLING_END);
|
|
|
|
if (docAcc->mScrollWatchTimer) {
|
|
docAcc->mScrollWatchTimer = nullptr;
|
|
NS_RELEASE(docAcc); // Release kung fu death grip
|
|
}
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// nsIScrollPositionListener
|
|
|
|
void DocAccessible::ScrollPositionDidChange(nscoord aX, nscoord aY) {
|
|
const uint32_t kScrollEventInterval = 100;
|
|
TimeStamp timestamp = TimeStamp::Now();
|
|
if (mLastScrollingDispatch.IsNull() ||
|
|
(timestamp - mLastScrollingDispatch).ToMilliseconds() >=
|
|
kScrollEventInterval) {
|
|
DispatchScrollingEvent(nsIAccessibleEvent::EVENT_SCROLLING);
|
|
mLastScrollingDispatch = timestamp;
|
|
}
|
|
|
|
// If timer callback is still pending, push it 100ms into the future.
|
|
// When scrolling ends and we don't fire this callback anymore, the
|
|
// timer callback will fire and dispatch an EVENT_SCROLLING_END.
|
|
if (mScrollWatchTimer) {
|
|
mScrollWatchTimer->SetDelay(kScrollEventInterval);
|
|
} else {
|
|
NS_NewTimerWithFuncCallback(getter_AddRefs(mScrollWatchTimer),
|
|
ScrollTimerCallback, this, kScrollEventInterval,
|
|
nsITimer::TYPE_ONE_SHOT,
|
|
"a11y::DocAccessible::ScrollPositionDidChange");
|
|
if (mScrollWatchTimer) {
|
|
NS_ADDREF_THIS(); // Kung fu death grip
|
|
}
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// nsIObserver
|
|
|
|
NS_IMETHODIMP
|
|
DocAccessible::Observe(nsISupports* aSubject, const char* aTopic,
|
|
const char16_t* aData) {
|
|
if (!nsCRT::strcmp(aTopic, "obs_documentCreated")) {
|
|
// State editable will now be set, readonly is now clear
|
|
// Normally we only fire delayed events created from the node, not an
|
|
// accessible object. See the AccStateChangeEvent constructor for details
|
|
// about this exceptional case.
|
|
RefPtr<AccEvent> event =
|
|
new AccStateChangeEvent(this, states::EDITABLE, true);
|
|
FireDelayedEvent(event);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// nsIAccessiblePivotObserver
|
|
|
|
NS_IMETHODIMP
|
|
DocAccessible::OnPivotChanged(nsIAccessiblePivot* aPivot,
|
|
nsIAccessible* aOldAccessible, int32_t aOldStart,
|
|
int32_t aOldEnd, nsIAccessible* aNewAccessible,
|
|
int32_t aNewStart, int32_t aNewEnd,
|
|
PivotMoveReason aReason,
|
|
TextBoundaryType aBoundaryType,
|
|
bool aIsFromUserInput) {
|
|
RefPtr<AccEvent> event = new AccVCChangeEvent(
|
|
this, (aOldAccessible ? aOldAccessible->ToInternalAccessible() : nullptr),
|
|
aOldStart, aOldEnd,
|
|
(aNewAccessible ? aNewAccessible->ToInternalAccessible() : nullptr),
|
|
aNewStart, aNewEnd, aReason, aBoundaryType,
|
|
aIsFromUserInput ? eFromUserInput : eNoUserInput);
|
|
nsEventShell::FireEvent(event);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// nsIDocumentObserver
|
|
|
|
NS_IMPL_NSIDOCUMENTOBSERVER_CORE_STUB(DocAccessible)
|
|
NS_IMPL_NSIDOCUMENTOBSERVER_LOAD_STUB(DocAccessible)
|
|
|
|
void DocAccessible::AttributeWillChange(dom::Element* aElement,
|
|
int32_t aNameSpaceID,
|
|
nsAtom* aAttribute, int32_t aModType) {
|
|
Accessible* accessible = GetAccessible(aElement);
|
|
if (!accessible) {
|
|
if (aElement != mContent) return;
|
|
|
|
accessible = this;
|
|
}
|
|
|
|
// Update dependent IDs cache. Take care of elements that are accessible
|
|
// because dependent IDs cache doesn't contain IDs from non accessible
|
|
// elements.
|
|
if (aModType != dom::MutationEvent_Binding::ADDITION)
|
|
RemoveDependentIDsFor(accessible, aAttribute);
|
|
|
|
if (aAttribute == nsGkAtoms::id) {
|
|
RelocateARIAOwnedIfNeeded(aElement);
|
|
}
|
|
|
|
// Store the ARIA attribute old value so that it can be used after
|
|
// attribute change. Note, we assume there's no nested ARIA attribute
|
|
// changes. If this happens then we should end up with keeping a stack of
|
|
// old values.
|
|
|
|
// XXX TODO: bugs 472142, 472143.
|
|
// Here we will want to cache whatever attribute values we are interested
|
|
// in, such as the existence of aria-pressed for button (so we know if we
|
|
// need to newly expose it as a toggle button) etc.
|
|
if (aAttribute == nsGkAtoms::aria_checked ||
|
|
aAttribute == nsGkAtoms::aria_pressed) {
|
|
mARIAAttrOldValue = (aModType != dom::MutationEvent_Binding::ADDITION)
|
|
? nsAccUtils::GetARIAToken(aElement, aAttribute)
|
|
: nullptr;
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::aria_disabled ||
|
|
aAttribute == nsGkAtoms::disabled)
|
|
mStateBitWasOn = accessible->Unavailable();
|
|
}
|
|
|
|
void DocAccessible::NativeAnonymousChildListChange(nsIContent* aContent,
|
|
bool aIsRemove) {
|
|
if (aIsRemove) {
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eTree)) {
|
|
logging::MsgBegin("TREE", "Anonymous content removed; doc: %p", this);
|
|
logging::Node("node", aContent);
|
|
logging::MsgEnd();
|
|
}
|
|
#endif
|
|
|
|
ContentRemoved(aContent);
|
|
}
|
|
}
|
|
|
|
void DocAccessible::AttributeChanged(dom::Element* aElement,
|
|
int32_t aNameSpaceID, nsAtom* aAttribute,
|
|
int32_t aModType,
|
|
const nsAttrValue* aOldValue) {
|
|
NS_ASSERTION(!IsDefunct(),
|
|
"Attribute changed called on defunct document accessible!");
|
|
|
|
// Proceed even if the element is not accessible because element may become
|
|
// accessible if it gets certain attribute.
|
|
if (UpdateAccessibleOnAttrChange(aElement, aAttribute)) return;
|
|
|
|
// Update the accessible tree on aria-hidden change. Make sure to not create
|
|
// a tree under aria-hidden='true'.
|
|
if (aAttribute == nsGkAtoms::aria_hidden) {
|
|
if (aria::HasDefinedARIAHidden(aElement)) {
|
|
ContentRemoved(aElement);
|
|
} else {
|
|
ContentInserted(aElement, aElement->GetNextSibling());
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Ignore attribute change if the element doesn't have an accessible (at all
|
|
// or still) iff the element is not a root content of this document accessible
|
|
// (which is treated as attribute change on this document accessible).
|
|
// Note: we don't bail if all the content hasn't finished loading because
|
|
// these attributes are changing for a loaded part of the content.
|
|
Accessible* accessible = GetAccessible(aElement);
|
|
if (!accessible) {
|
|
if (mContent != aElement) return;
|
|
|
|
accessible = this;
|
|
}
|
|
|
|
MOZ_ASSERT(accessible->IsBoundToParent() || accessible->IsDoc(),
|
|
"DOM attribute change on an accessible detached from the tree");
|
|
|
|
// Fire accessible events iff there's an accessible, otherwise we consider
|
|
// the accessible state wasn't changed, i.e. its state is initial state.
|
|
AttributeChangedImpl(accessible, aNameSpaceID, aAttribute);
|
|
|
|
// Update dependent IDs cache. Take care of accessible elements because no
|
|
// accessible element means either the element is not accessible at all or
|
|
// its accessible will be created later. It doesn't make sense to keep
|
|
// dependent IDs for non accessible elements. For the second case we'll update
|
|
// dependent IDs cache when its accessible is created.
|
|
if (aModType == dom::MutationEvent_Binding::MODIFICATION ||
|
|
aModType == dom::MutationEvent_Binding::ADDITION) {
|
|
AddDependentIDsFor(accessible, aAttribute);
|
|
}
|
|
}
|
|
|
|
// DocAccessible protected member
|
|
void DocAccessible::AttributeChangedImpl(Accessible* aAccessible,
|
|
int32_t aNameSpaceID,
|
|
nsAtom* aAttribute) {
|
|
// Fire accessible event after short timer, because we need to wait for
|
|
// DOM attribute & resulting layout to actually change. Otherwise,
|
|
// assistive technology will retrieve the wrong state/value/selection info.
|
|
|
|
// XXX todo
|
|
// We still need to handle special HTML cases here
|
|
// For example, if an <img>'s usemap attribute is modified
|
|
// Otherwise it may just be a state change, for example an object changing
|
|
// its visibility
|
|
//
|
|
// XXX todo: report aria state changes for "undefined" literal value changes
|
|
// filed as bug 472142
|
|
//
|
|
// XXX todo: invalidate accessible when aria state changes affect exposed
|
|
// role filed as bug 472143
|
|
|
|
// Universal boolean properties that don't require a role. Fire the state
|
|
// change when disabled or aria-disabled attribute is set.
|
|
// Note. Checking the XUL or HTML namespace would not seem to gain us
|
|
// anything, because disabled attribute really is going to mean the same
|
|
// thing in any namespace.
|
|
// Note. We use the attribute instead of the disabled state bit because
|
|
// ARIA's aria-disabled does not affect the disabled state bit.
|
|
if (aAttribute == nsGkAtoms::disabled ||
|
|
aAttribute == nsGkAtoms::aria_disabled) {
|
|
// Do nothing if state wasn't changed (like @aria-disabled was removed but
|
|
// @disabled is still presented).
|
|
if (aAccessible->Unavailable() == mStateBitWasOn) return;
|
|
|
|
RefPtr<AccEvent> enabledChangeEvent =
|
|
new AccStateChangeEvent(aAccessible, states::ENABLED, mStateBitWasOn);
|
|
FireDelayedEvent(enabledChangeEvent);
|
|
|
|
RefPtr<AccEvent> sensitiveChangeEvent =
|
|
new AccStateChangeEvent(aAccessible, states::SENSITIVE, mStateBitWasOn);
|
|
FireDelayedEvent(sensitiveChangeEvent);
|
|
return;
|
|
}
|
|
|
|
// When a details object has its open attribute changed
|
|
// we should fire a state-change event on the accessible of
|
|
// its main summary
|
|
if (aAttribute == nsGkAtoms::open) {
|
|
// FromDetails checks if the given accessible belongs to
|
|
// a details frame and also locates the accessible of its
|
|
// main summary.
|
|
if (HTMLSummaryAccessible* summaryAccessible =
|
|
HTMLSummaryAccessible::FromDetails(aAccessible)) {
|
|
RefPtr<AccEvent> expandedChangeEvent =
|
|
new AccStateChangeEvent(summaryAccessible, states::EXPANDED);
|
|
FireDelayedEvent(expandedChangeEvent);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Check for namespaced ARIA attribute
|
|
if (aNameSpaceID == kNameSpaceID_None) {
|
|
// Check for hyphenated aria-foo property?
|
|
if (StringBeginsWith(nsDependentAtomString(aAttribute),
|
|
NS_LITERAL_STRING("aria-"))) {
|
|
ARIAAttributeChanged(aAccessible, aAttribute);
|
|
}
|
|
}
|
|
|
|
// Fire name change and description change events. XXX: it's not complete and
|
|
// dupes the code logic of accessible name and description calculation, we do
|
|
// that for performance reasons.
|
|
if (aAttribute == nsGkAtoms::aria_label) {
|
|
FireDelayedEvent(nsIAccessibleEvent::EVENT_NAME_CHANGE, aAccessible);
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::aria_describedby) {
|
|
FireDelayedEvent(nsIAccessibleEvent::EVENT_DESCRIPTION_CHANGE, aAccessible);
|
|
return;
|
|
}
|
|
|
|
dom::Element* elm = aAccessible->GetContent()->AsElement();
|
|
if (aAttribute == nsGkAtoms::aria_labelledby &&
|
|
!elm->HasAttr(kNameSpaceID_None, nsGkAtoms::aria_label)) {
|
|
FireDelayedEvent(nsIAccessibleEvent::EVENT_NAME_CHANGE, aAccessible);
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::alt &&
|
|
!elm->HasAttr(kNameSpaceID_None, nsGkAtoms::aria_label) &&
|
|
!elm->HasAttr(kNameSpaceID_None, nsGkAtoms::aria_labelledby)) {
|
|
FireDelayedEvent(nsIAccessibleEvent::EVENT_NAME_CHANGE, aAccessible);
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::title) {
|
|
if (!elm->HasAttr(kNameSpaceID_None, nsGkAtoms::aria_label) &&
|
|
!elm->HasAttr(kNameSpaceID_None, nsGkAtoms::aria_labelledby) &&
|
|
!elm->HasAttr(kNameSpaceID_None, nsGkAtoms::alt)) {
|
|
FireDelayedEvent(nsIAccessibleEvent::EVENT_NAME_CHANGE, aAccessible);
|
|
return;
|
|
}
|
|
|
|
if (!elm->HasAttr(kNameSpaceID_None, nsGkAtoms::aria_describedby))
|
|
FireDelayedEvent(nsIAccessibleEvent::EVENT_DESCRIPTION_CHANGE,
|
|
aAccessible);
|
|
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::aria_busy) {
|
|
bool isOn = elm->AttrValueIs(aNameSpaceID, aAttribute, nsGkAtoms::_true,
|
|
eCaseMatters);
|
|
RefPtr<AccEvent> event =
|
|
new AccStateChangeEvent(aAccessible, states::BUSY, isOn);
|
|
FireDelayedEvent(event);
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::id) {
|
|
RelocateARIAOwnedIfNeeded(elm);
|
|
ARIAActiveDescendantIDMaybeMoved(elm);
|
|
}
|
|
|
|
// ARIA or XUL selection
|
|
if ((aAccessible->GetContent()->IsXULElement() &&
|
|
aAttribute == nsGkAtoms::selected) ||
|
|
aAttribute == nsGkAtoms::aria_selected) {
|
|
Accessible* widget =
|
|
nsAccUtils::GetSelectableContainer(aAccessible, aAccessible->State());
|
|
if (widget) {
|
|
AccSelChangeEvent::SelChangeType selChangeType =
|
|
elm->AttrValueIs(aNameSpaceID, aAttribute, nsGkAtoms::_true,
|
|
eCaseMatters)
|
|
? AccSelChangeEvent::eSelectionAdd
|
|
: AccSelChangeEvent::eSelectionRemove;
|
|
|
|
RefPtr<AccEvent> event =
|
|
new AccSelChangeEvent(widget, aAccessible, selChangeType);
|
|
FireDelayedEvent(event);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::contenteditable) {
|
|
RefPtr<AccEvent> editableChangeEvent =
|
|
new AccStateChangeEvent(aAccessible, states::EDITABLE);
|
|
FireDelayedEvent(editableChangeEvent);
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::value) {
|
|
if (aAccessible->IsProgress())
|
|
FireDelayedEvent(nsIAccessibleEvent::EVENT_VALUE_CHANGE, aAccessible);
|
|
}
|
|
}
|
|
|
|
// DocAccessible protected member
|
|
void DocAccessible::ARIAAttributeChanged(Accessible* aAccessible,
|
|
nsAtom* aAttribute) {
|
|
// Note: For universal/global ARIA states and properties we don't care if
|
|
// there is an ARIA role present or not.
|
|
|
|
if (aAttribute == nsGkAtoms::aria_required) {
|
|
RefPtr<AccEvent> event =
|
|
new AccStateChangeEvent(aAccessible, states::REQUIRED);
|
|
FireDelayedEvent(event);
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::aria_invalid) {
|
|
RefPtr<AccEvent> event =
|
|
new AccStateChangeEvent(aAccessible, states::INVALID);
|
|
FireDelayedEvent(event);
|
|
return;
|
|
}
|
|
|
|
// The activedescendant universal property redirects accessible focus events
|
|
// to the element with the id that activedescendant points to. Make sure
|
|
// the tree up to date before processing. In other words, when a node has just
|
|
// been inserted, the tree won't be up to date yet, so we must always schedule
|
|
// an async notification so that a newly inserted node will be present in
|
|
// the tree.
|
|
if (aAttribute == nsGkAtoms::aria_activedescendant) {
|
|
mNotificationController->ScheduleNotification<DocAccessible, Accessible>(
|
|
this, &DocAccessible::ARIAActiveDescendantChanged, aAccessible);
|
|
return;
|
|
}
|
|
|
|
// We treat aria-expanded as a global ARIA state for historical reasons
|
|
if (aAttribute == nsGkAtoms::aria_expanded) {
|
|
RefPtr<AccEvent> event =
|
|
new AccStateChangeEvent(aAccessible, states::EXPANDED);
|
|
FireDelayedEvent(event);
|
|
return;
|
|
}
|
|
|
|
// For aria attributes like drag and drop changes we fire a generic attribute
|
|
// change event; at least until native API comes up with a more meaningful
|
|
// event.
|
|
uint8_t attrFlags = aria::AttrCharacteristicsFor(aAttribute);
|
|
if (!(attrFlags & ATTR_BYPASSOBJ)) {
|
|
RefPtr<AccEvent> event =
|
|
new AccObjectAttrChangedEvent(aAccessible, aAttribute);
|
|
FireDelayedEvent(event);
|
|
}
|
|
|
|
dom::Element* elm = aAccessible->GetContent()->AsElement();
|
|
|
|
if (aAttribute == nsGkAtoms::aria_checked ||
|
|
(aAccessible->IsButton() && aAttribute == nsGkAtoms::aria_pressed)) {
|
|
const uint64_t kState = (aAttribute == nsGkAtoms::aria_checked)
|
|
? states::CHECKED
|
|
: states::PRESSED;
|
|
RefPtr<AccEvent> event = new AccStateChangeEvent(aAccessible, kState);
|
|
FireDelayedEvent(event);
|
|
|
|
bool wasMixed = (mARIAAttrOldValue == nsGkAtoms::mixed);
|
|
bool isMixed = elm->AttrValueIs(kNameSpaceID_None, aAttribute,
|
|
nsGkAtoms::mixed, eCaseMatters);
|
|
if (isMixed != wasMixed) {
|
|
RefPtr<AccEvent> event =
|
|
new AccStateChangeEvent(aAccessible, states::MIXED, isMixed);
|
|
FireDelayedEvent(event);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::aria_readonly) {
|
|
RefPtr<AccEvent> event =
|
|
new AccStateChangeEvent(aAccessible, states::READONLY);
|
|
FireDelayedEvent(event);
|
|
return;
|
|
}
|
|
|
|
// Fire text value change event whenever aria-valuetext is changed.
|
|
if (aAttribute == nsGkAtoms::aria_valuetext) {
|
|
FireDelayedEvent(nsIAccessibleEvent::EVENT_TEXT_VALUE_CHANGE, aAccessible);
|
|
return;
|
|
}
|
|
|
|
// Fire numeric value change event when aria-valuenow is changed and
|
|
// aria-valuetext is empty
|
|
if (aAttribute == nsGkAtoms::aria_valuenow &&
|
|
(!elm->HasAttr(kNameSpaceID_None, nsGkAtoms::aria_valuetext) ||
|
|
elm->AttrValueIs(kNameSpaceID_None, nsGkAtoms::aria_valuetext,
|
|
nsGkAtoms::_empty, eCaseMatters))) {
|
|
FireDelayedEvent(nsIAccessibleEvent::EVENT_VALUE_CHANGE, aAccessible);
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::aria_current) {
|
|
RefPtr<AccEvent> event =
|
|
new AccStateChangeEvent(aAccessible, states::CURRENT);
|
|
FireDelayedEvent(event);
|
|
return;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::aria_owns) {
|
|
mNotificationController->ScheduleRelocation(aAccessible);
|
|
}
|
|
}
|
|
|
|
void DocAccessible::ARIAActiveDescendantChanged(Accessible* aAccessible) {
|
|
nsIContent* elm = aAccessible->GetContent();
|
|
if (elm && elm->IsElement() && aAccessible->IsActiveWidget()) {
|
|
nsAutoString id;
|
|
if (elm->AsElement()->GetAttr(kNameSpaceID_None,
|
|
nsGkAtoms::aria_activedescendant, id)) {
|
|
dom::Element* activeDescendantElm = IDRefsIterator::GetElem(elm, id);
|
|
if (activeDescendantElm) {
|
|
Accessible* activeDescendant = GetAccessible(activeDescendantElm);
|
|
if (activeDescendant) {
|
|
FocusMgr()->ActiveItemChanged(activeDescendant, false);
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eFocus))
|
|
logging::ActiveItemChangeCausedBy("ARIA activedescedant changed",
|
|
activeDescendant);
|
|
#endif
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
// aria-activedescendant was cleared or changed to a non-existent node.
|
|
// Move focus back to the element itself.
|
|
FocusMgr()->ActiveItemChanged(aAccessible, false);
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eFocus)) {
|
|
logging::ActiveItemChangeCausedBy("ARIA activedescedant cleared",
|
|
aAccessible);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void DocAccessible::ContentAppended(nsIContent* aFirstNewContent) {}
|
|
|
|
void DocAccessible::ContentStateChanged(dom::Document* aDocument,
|
|
nsIContent* aContent,
|
|
EventStates aStateMask) {
|
|
Accessible* accessible = GetAccessible(aContent);
|
|
if (!accessible) return;
|
|
|
|
if (aStateMask.HasState(NS_EVENT_STATE_CHECKED)) {
|
|
Accessible* widget = accessible->ContainerWidget();
|
|
if (widget && widget->IsSelect()) {
|
|
AccSelChangeEvent::SelChangeType selChangeType =
|
|
aContent->AsElement()->State().HasState(NS_EVENT_STATE_CHECKED)
|
|
? AccSelChangeEvent::eSelectionAdd
|
|
: AccSelChangeEvent::eSelectionRemove;
|
|
RefPtr<AccEvent> event =
|
|
new AccSelChangeEvent(widget, accessible, selChangeType);
|
|
FireDelayedEvent(event);
|
|
return;
|
|
}
|
|
|
|
RefPtr<AccEvent> event = new AccStateChangeEvent(
|
|
accessible, states::CHECKED,
|
|
aContent->AsElement()->State().HasState(NS_EVENT_STATE_CHECKED));
|
|
FireDelayedEvent(event);
|
|
}
|
|
|
|
if (aStateMask.HasState(NS_EVENT_STATE_INVALID)) {
|
|
RefPtr<AccEvent> event =
|
|
new AccStateChangeEvent(accessible, states::INVALID, true);
|
|
FireDelayedEvent(event);
|
|
}
|
|
|
|
if (aStateMask.HasState(NS_EVENT_STATE_VISITED)) {
|
|
RefPtr<AccEvent> event =
|
|
new AccStateChangeEvent(accessible, states::TRAVERSED, true);
|
|
FireDelayedEvent(event);
|
|
}
|
|
}
|
|
|
|
void DocAccessible::CharacterDataWillChange(nsIContent* aContent,
|
|
const CharacterDataChangeInfo&) {}
|
|
|
|
void DocAccessible::CharacterDataChanged(nsIContent* aContent,
|
|
const CharacterDataChangeInfo&) {}
|
|
|
|
void DocAccessible::ContentInserted(nsIContent* aChild) {}
|
|
|
|
void DocAccessible::ContentRemoved(nsIContent* aChildNode,
|
|
nsIContent* aPreviousSiblingNode) {
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eTree)) {
|
|
logging::MsgBegin("TREE", "DOM content removed; doc: %p", this);
|
|
logging::Node("container node", aChildNode->GetParent());
|
|
logging::Node("content node", aChildNode);
|
|
logging::MsgEnd();
|
|
}
|
|
#endif
|
|
// This one and content removal notification from layout may result in
|
|
// double processing of same subtrees. If it pops up in profiling, then
|
|
// consider reusing a document node cache to reject these notifications early.
|
|
ContentRemoved(aChildNode);
|
|
}
|
|
|
|
void DocAccessible::ParentChainChanged(nsIContent* aContent) {}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// Accessible
|
|
|
|
#ifdef A11Y_LOG
|
|
nsresult DocAccessible::HandleAccEvent(AccEvent* aEvent) {
|
|
if (logging::IsEnabled(logging::eDocLoad))
|
|
logging::DocLoadEventHandled(aEvent);
|
|
|
|
return HyperTextAccessible::HandleAccEvent(aEvent);
|
|
}
|
|
#endif
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// Public members
|
|
|
|
void* DocAccessible::GetNativeWindow() const {
|
|
if (!mPresShell) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsViewManager* vm = mPresShell->GetViewManager();
|
|
if (!vm) return nullptr;
|
|
|
|
nsCOMPtr<nsIWidget> widget;
|
|
vm->GetRootWidget(getter_AddRefs(widget));
|
|
if (widget) return widget->GetNativeData(NS_NATIVE_WINDOW);
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
Accessible* DocAccessible::GetAccessibleByUniqueIDInSubtree(void* aUniqueID) {
|
|
Accessible* child = GetAccessibleByUniqueID(aUniqueID);
|
|
if (child) return child;
|
|
|
|
uint32_t childDocCount = mChildDocuments.Length();
|
|
for (uint32_t childDocIdx = 0; childDocIdx < childDocCount; childDocIdx++) {
|
|
DocAccessible* childDocument = mChildDocuments.ElementAt(childDocIdx);
|
|
child = childDocument->GetAccessibleByUniqueIDInSubtree(aUniqueID);
|
|
if (child) return child;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
Accessible* DocAccessible::GetAccessibleOrContainer(
|
|
nsINode* aNode, bool aNoContainerIfPruned) const {
|
|
if (!aNode || !aNode->GetComposedDoc()) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsINode* currNode = nullptr;
|
|
if (aNode->IsShadowRoot()) {
|
|
// This can happen, for example, when called within
|
|
// SelectionManager::ProcessSelectionChanged due to focusing a direct
|
|
// child of a shadow root.
|
|
// GetFlattenedTreeParent works on children of a shadow root, but not the
|
|
// shadow root itself.
|
|
const dom::ShadowRoot* shadowRoot = dom::ShadowRoot::FromNode(aNode);
|
|
currNode = shadowRoot->GetHost();
|
|
if (!currNode) {
|
|
return nullptr;
|
|
}
|
|
} else {
|
|
currNode = aNode;
|
|
}
|
|
|
|
MOZ_ASSERT(currNode);
|
|
for (; currNode; currNode = currNode->GetFlattenedTreeParentNode()) {
|
|
// No container if is inside of aria-hidden subtree.
|
|
if (aNoContainerIfPruned && currNode->IsElement() &&
|
|
aria::HasDefinedARIAHidden(currNode->AsElement())) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Check if node is in an unselected deck panel
|
|
if (aNoContainerIfPruned && currNode->IsXULElement()) {
|
|
if (nsIFrame* frame = currNode->AsContent()->GetPrimaryFrame()) {
|
|
nsDeckFrame* deckFrame = do_QueryFrame(frame->GetParent());
|
|
if (deckFrame && deckFrame->GetSelectedBox() != frame) {
|
|
// If deck is not a <tabpanels>, return null
|
|
nsIContent* parentFrameContent = deckFrame->GetContent();
|
|
if (!parentFrameContent ||
|
|
!parentFrameContent->IsXULElement(nsGkAtoms::tabpanels)) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check if node is in zero-sized map
|
|
if (aNoContainerIfPruned && currNode->IsHTMLElement(nsGkAtoms::map)) {
|
|
if (nsIFrame* frame = currNode->AsContent()->GetPrimaryFrame()) {
|
|
if (nsLayoutUtils::GetAllInFlowRectsUnion(frame, frame->GetParent())
|
|
.IsEmpty()) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Accessible* accessible = GetAccessible(currNode)) {
|
|
return accessible;
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
Accessible* DocAccessible::GetAccessibleOrDescendant(nsINode* aNode) const {
|
|
Accessible* acc = GetAccessible(aNode);
|
|
if (acc) return acc;
|
|
|
|
if (aNode == mContent || aNode == mDocumentNode->GetRootElement()) {
|
|
// If the node is the doc's body or root element, return the doc accessible.
|
|
return const_cast<DocAccessible*>(this);
|
|
}
|
|
|
|
acc = GetContainerAccessible(aNode);
|
|
if (acc) {
|
|
// We access the `mChildren` array directly so that we don't access
|
|
// lazily created children in places like `XULTreeAccessible` and
|
|
// `XULTreeGridAccessible`.
|
|
uint32_t childCnt = acc->mChildren.Length();
|
|
for (uint32_t idx = 0; idx < childCnt; idx++) {
|
|
Accessible* child = acc->mChildren.ElementAt(idx);
|
|
for (nsIContent* elm = child->GetContent();
|
|
elm && elm != acc->GetContent();
|
|
elm = elm->GetFlattenedTreeParent()) {
|
|
if (elm == aNode) return child;
|
|
}
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void DocAccessible::BindToDocument(Accessible* aAccessible,
|
|
const nsRoleMapEntry* aRoleMapEntry) {
|
|
// Put into DOM node cache.
|
|
if (aAccessible->IsNodeMapEntry())
|
|
mNodeToAccessibleMap.Put(aAccessible->GetNode(), aAccessible);
|
|
|
|
// Put into unique ID cache.
|
|
mAccessibleCache.Put(aAccessible->UniqueID(), aAccessible);
|
|
|
|
aAccessible->SetRoleMapEntry(aRoleMapEntry);
|
|
|
|
if (aAccessible->HasOwnContent()) {
|
|
AddDependentIDsFor(aAccessible);
|
|
|
|
nsIContent* content = aAccessible->GetContent();
|
|
if (content->IsElement() && content->AsElement()->HasAttr(
|
|
kNameSpaceID_None, nsGkAtoms::aria_owns)) {
|
|
mNotificationController->ScheduleRelocation(aAccessible);
|
|
}
|
|
}
|
|
}
|
|
|
|
void DocAccessible::UnbindFromDocument(Accessible* aAccessible) {
|
|
NS_ASSERTION(mAccessibleCache.GetWeak(aAccessible->UniqueID()),
|
|
"Unbinding the unbound accessible!");
|
|
|
|
// Fire focus event on accessible having DOM focus if last focus was removed
|
|
// from the tree.
|
|
if (FocusMgr()->WasLastFocused(aAccessible)) {
|
|
FocusMgr()->ActiveItemChanged(nullptr);
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eFocus))
|
|
logging::ActiveItemChangeCausedBy("tree shutdown", aAccessible);
|
|
#endif
|
|
}
|
|
|
|
// Remove an accessible from node-to-accessible map if it exists there.
|
|
if (aAccessible->IsNodeMapEntry() &&
|
|
mNodeToAccessibleMap.Get(aAccessible->GetNode()) == aAccessible)
|
|
mNodeToAccessibleMap.Remove(aAccessible->GetNode());
|
|
|
|
aAccessible->mStateFlags |= eIsNotInDocument;
|
|
|
|
// Update XPCOM part.
|
|
xpcAccessibleDocument* xpcDoc = GetAccService()->GetCachedXPCDocument(this);
|
|
if (xpcDoc) xpcDoc->NotifyOfShutdown(aAccessible);
|
|
|
|
void* uniqueID = aAccessible->UniqueID();
|
|
|
|
NS_ASSERTION(!aAccessible->IsDefunct(), "Shutdown the shutdown accessible!");
|
|
aAccessible->Shutdown();
|
|
|
|
mAccessibleCache.Remove(uniqueID);
|
|
}
|
|
|
|
void DocAccessible::ContentInserted(nsIContent* aStartChildNode,
|
|
nsIContent* aEndChildNode) {
|
|
// Ignore content insertions until we constructed accessible tree. Otherwise
|
|
// schedule tree update on content insertion after layout.
|
|
if (!mNotificationController || !HasLoadState(eTreeConstructed)) {
|
|
return;
|
|
}
|
|
|
|
// The frame constructor guarantees that only ranges with the same parent
|
|
// arrive here in presence of dynamic changes to the page, see
|
|
// nsCSSFrameConstructor::IssueSingleInsertNotifications' callers.
|
|
nsINode* parent = aStartChildNode->GetFlattenedTreeParentNode();
|
|
if (!parent) {
|
|
return;
|
|
}
|
|
|
|
Accessible* container = AccessibleOrTrueContainer(parent);
|
|
if (!container) {
|
|
return;
|
|
}
|
|
|
|
AutoTArray<nsCOMPtr<nsIContent>, 10> list;
|
|
for (nsIContent* node = aStartChildNode; node != aEndChildNode;
|
|
node = node->GetNextSibling()) {
|
|
MOZ_ASSERT(parent == node->GetFlattenedTreeParentNode());
|
|
if (PruneOrInsertSubtree(node)) {
|
|
list.AppendElement(node);
|
|
}
|
|
}
|
|
|
|
mNotificationController->ScheduleContentInsertion(container, list);
|
|
}
|
|
|
|
bool DocAccessible::PruneOrInsertSubtree(nsIContent* aRoot) {
|
|
bool insert = false;
|
|
|
|
// In the case that we are, or are in, a shadow host, we need to assure
|
|
// some accessibles are removed if they are not rendered anymore.
|
|
nsIContent* shadowHost =
|
|
aRoot->GetShadowRoot() ? aRoot : aRoot->GetContainingShadowHost();
|
|
if (shadowHost) {
|
|
dom::ExplicitChildIterator iter(shadowHost);
|
|
|
|
// Check all explicit children in the host, if they are not slotted
|
|
// then remove their accessibles and subtrees.
|
|
while (nsIContent* childNode = iter.GetNextChild()) {
|
|
if (!childNode->GetPrimaryFrame() &&
|
|
!nsCoreUtils::IsDisplayContents(childNode)) {
|
|
ContentRemoved(childNode);
|
|
}
|
|
}
|
|
|
|
// If this is a slot, check to see if its fallback content is rendered,
|
|
// if not - remove it.
|
|
if (aRoot->IsHTMLElement(nsGkAtoms::slot)) {
|
|
for (nsIContent* childNode = aRoot->GetFirstChild(); childNode;
|
|
childNode = childNode->GetNextSibling()) {
|
|
if (!childNode->GetPrimaryFrame() &&
|
|
!nsCoreUtils::IsDisplayContents(childNode)) {
|
|
ContentRemoved(childNode);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// If we already have an accessible, check if we need to remove it, recreate
|
|
// it, or keep it in place.
|
|
Accessible* acc = GetAccessible(aRoot);
|
|
if (acc) {
|
|
MOZ_ASSERT(aRoot == acc->GetContent(), "Accessible has differing content!");
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eTree)) {
|
|
logging::MsgBegin(
|
|
"TREE", "inserted content already has accessible; doc: %p", this);
|
|
logging::Node("content node", aRoot);
|
|
logging::AccessibleInfo("accessible node", acc);
|
|
logging::MsgEnd();
|
|
}
|
|
#endif
|
|
|
|
nsIFrame* frame = acc->GetFrame();
|
|
|
|
// Accessible has no frame and it's not display:contents. Remove it.
|
|
// As well as removing the a11y subtree, we must also remove Accessibles
|
|
// for DOM descendants, since some of these might be relocated Accessibles
|
|
// and their DOM nodes are now hidden as well.
|
|
if (!frame && !nsCoreUtils::IsDisplayContents(aRoot)) {
|
|
ContentRemoved(aRoot);
|
|
return false;
|
|
}
|
|
|
|
// If it's a XULLabel it was probably reframed because a `value` attribute
|
|
// was added. The accessible creates its text leaf upon construction, so we
|
|
// need to recreate. Remove it, and schedule for reconstruction.
|
|
if (acc->IsXULLabel()) {
|
|
ContentRemoved(acc);
|
|
return true;
|
|
}
|
|
|
|
// It is a broken image that is being reframed because it either got
|
|
// or lost an `alt` tag that would rerender this node as text.
|
|
if (frame && (acc->IsImage() != (frame->AccessibleType() == eImageType))) {
|
|
ContentRemoved(aRoot);
|
|
return true;
|
|
}
|
|
|
|
// The accessible can be reparented or reordered in its parent.
|
|
// We schedule it for reinsertion. For example, a slotted element
|
|
// can change its slot attribute to a different slot.
|
|
insert = true;
|
|
} else {
|
|
// If there is no current accessible, and the node has a frame, or is
|
|
// display:contents, schedule it for insertion.
|
|
if (aRoot->GetPrimaryFrame() || nsCoreUtils::IsDisplayContents(aRoot)) {
|
|
// This may be a new subtree, the insertion process will recurse through
|
|
// its descendants.
|
|
if (!GetAccessibleOrDescendant(aRoot)) {
|
|
return true;
|
|
}
|
|
|
|
// Content is not an accessible, but has accessible descendants.
|
|
// We schedule this container for insertion strictly for the case where it
|
|
// itself now needs an accessible. We will still need to recurse into the
|
|
// descendant content to prune accessibles, and in all likelyness to
|
|
// insert accessibles since accessible insertions will likeley get missed
|
|
// in an existing subtree.
|
|
insert = true;
|
|
}
|
|
}
|
|
|
|
if (Accessible* container = AccessibleOrTrueContainer(aRoot)) {
|
|
AutoTArray<nsCOMPtr<nsIContent>, 10> list;
|
|
dom::AllChildrenIterator iter =
|
|
dom::AllChildrenIterator(aRoot, nsIContent::eAllChildren, true);
|
|
while (nsIContent* childNode = iter.GetNextChild()) {
|
|
if (PruneOrInsertSubtree(childNode)) {
|
|
list.AppendElement(childNode);
|
|
}
|
|
}
|
|
|
|
if (!list.IsEmpty()) {
|
|
mNotificationController->ScheduleContentInsertion(container, list);
|
|
}
|
|
}
|
|
|
|
return insert;
|
|
}
|
|
|
|
void DocAccessible::RecreateAccessible(nsIContent* aContent) {
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eTree)) {
|
|
logging::MsgBegin("TREE", "accessible recreated");
|
|
logging::Node("content", aContent);
|
|
logging::MsgEnd();
|
|
}
|
|
#endif
|
|
|
|
// XXX: we shouldn't recreate whole accessible subtree, instead we should
|
|
// subclass hide and show events to handle them separately and implement their
|
|
// coalescence with normal hide and show events. Note, in this case they
|
|
// should be coalesced with normal show/hide events.
|
|
ContentRemoved(aContent);
|
|
ContentInserted(aContent, aContent->GetNextSibling());
|
|
}
|
|
|
|
void DocAccessible::ProcessInvalidationList() {
|
|
// Invalidate children of container accessible for each element in
|
|
// invalidation list. Allow invalidation list insertions while container
|
|
// children are recached.
|
|
for (uint32_t idx = 0; idx < mInvalidationList.Length(); idx++) {
|
|
nsIContent* content = mInvalidationList[idx];
|
|
if (!HasAccessible(content) && content->HasID()) {
|
|
Accessible* container = GetContainerAccessible(content);
|
|
if (container) {
|
|
// Check if the node is a target of aria-owns, and if so, don't process
|
|
// it here and let DoARIAOwnsRelocation process it.
|
|
AttrRelProviders* list = GetRelProviders(
|
|
content->AsElement(), nsDependentAtomString(content->GetID()));
|
|
bool shouldProcess = !!list;
|
|
if (shouldProcess) {
|
|
for (uint32_t idx = 0; idx < list->Length(); idx++) {
|
|
if (list->ElementAt(idx)->mRelAttr == nsGkAtoms::aria_owns) {
|
|
shouldProcess = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (shouldProcess) {
|
|
ProcessContentInserted(container, content);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
mInvalidationList.Clear();
|
|
}
|
|
|
|
Accessible* DocAccessible::GetAccessibleEvenIfNotInMap(nsINode* aNode) const {
|
|
if (!aNode->IsContent() ||
|
|
!aNode->AsContent()->IsHTMLElement(nsGkAtoms::area))
|
|
return GetAccessible(aNode);
|
|
|
|
// XXX Bug 135040, incorrect when multiple images use the same map.
|
|
nsIFrame* frame = aNode->AsContent()->GetPrimaryFrame();
|
|
nsImageFrame* imageFrame = do_QueryFrame(frame);
|
|
if (imageFrame) {
|
|
Accessible* parent = GetAccessible(imageFrame->GetContent());
|
|
if (parent) {
|
|
Accessible* area = parent->AsImageMap()->GetChildAccessibleFor(aNode);
|
|
if (area) return area;
|
|
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
return GetAccessible(aNode);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// Protected members
|
|
|
|
void DocAccessible::NotifyOfLoading(bool aIsReloading) {
|
|
// Mark the document accessible as loading, if it stays alive then we'll mark
|
|
// it as loaded when we receive proper notification.
|
|
mLoadState &= ~eDOMLoaded;
|
|
|
|
if (!IsLoadEventTarget()) return;
|
|
|
|
if (aIsReloading && !mLoadEventType) {
|
|
// Fire reload and state busy events on existing document accessible while
|
|
// event from user input flag can be calculated properly and accessible
|
|
// is alive. When new document gets loaded then this one is destroyed.
|
|
RefPtr<AccEvent> reloadEvent =
|
|
new AccEvent(nsIAccessibleEvent::EVENT_DOCUMENT_RELOAD, this);
|
|
nsEventShell::FireEvent(reloadEvent);
|
|
}
|
|
|
|
// Fire state busy change event. Use delayed event since we don't care
|
|
// actually if event isn't delivered when the document goes away like a shot.
|
|
RefPtr<AccEvent> stateEvent =
|
|
new AccStateChangeEvent(this, states::BUSY, true);
|
|
FireDelayedEvent(stateEvent);
|
|
}
|
|
|
|
void DocAccessible::DoInitialUpdate() {
|
|
if (nsCoreUtils::IsTabDocument(mDocumentNode)) {
|
|
mDocFlags |= eTabDocument;
|
|
if (IPCAccessibilityActive()) {
|
|
nsIDocShell* docShell = mDocumentNode->GetDocShell();
|
|
if (RefPtr<dom::BrowserChild> browserChild =
|
|
dom::BrowserChild::GetFrom(docShell)) {
|
|
DocAccessibleChild* ipcDoc = IPCDoc();
|
|
if (!ipcDoc) {
|
|
ipcDoc = new DocAccessibleChild(this, browserChild);
|
|
SetIPCDoc(ipcDoc);
|
|
|
|
#if defined(XP_WIN)
|
|
IAccessibleHolder holder(
|
|
CreateHolderFromAccessible(WrapNotNull(this)));
|
|
MOZ_ASSERT(!holder.IsNull());
|
|
int32_t childID = AccessibleWrap::GetChildIDFor(this);
|
|
#else
|
|
int32_t holder = 0, childID = 0;
|
|
#endif
|
|
browserChild->SendPDocAccessibleConstructor(ipcDoc, nullptr, 0,
|
|
childID, holder);
|
|
#if !defined(XP_WIN)
|
|
ipcDoc->SendPDocAccessiblePlatformExtConstructor();
|
|
#endif
|
|
}
|
|
|
|
if (IsRoot()) {
|
|
browserChild->SetTopLevelDocAccessibleChild(ipcDoc);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
mLoadState |= eTreeConstructed;
|
|
|
|
// Set up a root element and ARIA role mapping.
|
|
UpdateRootElIfNeeded();
|
|
|
|
// Build initial tree.
|
|
CacheChildrenInSubtree(this);
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eVerbose)) {
|
|
logging::Tree("TREE", "Initial subtree", this);
|
|
}
|
|
#endif
|
|
|
|
// Fire reorder event after the document tree is constructed. Note, since
|
|
// this reorder event is processed by parent document then events targeted to
|
|
// this document may be fired prior to this reorder event. If this is
|
|
// a problem then consider to keep event processing per tab document.
|
|
if (!IsRoot()) {
|
|
RefPtr<AccReorderEvent> reorderEvent = new AccReorderEvent(Parent());
|
|
ParentDocument()->FireDelayedEvent(reorderEvent);
|
|
}
|
|
|
|
if (IPCAccessibilityActive()) {
|
|
DocAccessibleChild* ipcDoc = IPCDoc();
|
|
MOZ_ASSERT(ipcDoc);
|
|
if (ipcDoc) {
|
|
for (auto idx = 0U; idx < mChildren.Length(); idx++) {
|
|
ipcDoc->InsertIntoIpcTree(this, mChildren.ElementAt(idx), idx);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void DocAccessible::ProcessLoad() {
|
|
mLoadState |= eCompletelyLoaded;
|
|
|
|
#ifdef A11Y_LOG
|
|
if (logging::IsEnabled(logging::eDocLoad))
|
|
logging::DocCompleteLoad(this, IsLoadEventTarget());
|
|
#endif
|
|
|
|
// Do not fire document complete/stop events for root chrome document
|
|
// accessibles and for frame/iframe documents because
|
|
// a) screen readers start working on focus event in the case of root chrome
|
|
// documents
|
|
// b) document load event on sub documents causes screen readers to act is if
|
|
// entire page is reloaded.
|
|
if (!IsLoadEventTarget()) return;
|
|
|
|
// Fire complete/load stopped if the load event type is given.
|
|
if (mLoadEventType) {
|
|
RefPtr<AccEvent> loadEvent = new AccEvent(mLoadEventType, this);
|
|
FireDelayedEvent(loadEvent);
|
|
|
|
mLoadEventType = 0;
|
|
}
|
|
|
|
// Fire busy state change event.
|
|
RefPtr<AccEvent> stateEvent =
|
|
new AccStateChangeEvent(this, states::BUSY, false);
|
|
FireDelayedEvent(stateEvent);
|
|
}
|
|
|
|
void DocAccessible::AddDependentIDsFor(Accessible* aRelProvider,
|
|
nsAtom* aRelAttr) {
|
|
dom::Element* relProviderEl = aRelProvider->Elm();
|
|
if (!relProviderEl) return;
|
|
|
|
for (uint32_t idx = 0; idx < kRelationAttrsLen; idx++) {
|
|
nsStaticAtom* relAttr = kRelationAttrs[idx];
|
|
if (aRelAttr && aRelAttr != relAttr) continue;
|
|
|
|
if (relAttr == nsGkAtoms::_for) {
|
|
if (!relProviderEl->IsAnyOfHTMLElements(nsGkAtoms::label,
|
|
nsGkAtoms::output))
|
|
continue;
|
|
|
|
} else if (relAttr == nsGkAtoms::control) {
|
|
if (!relProviderEl->IsAnyOfXULElements(nsGkAtoms::label,
|
|
nsGkAtoms::description))
|
|
continue;
|
|
}
|
|
|
|
IDRefsIterator iter(this, relProviderEl, relAttr);
|
|
while (true) {
|
|
const nsDependentSubstring id = iter.NextID();
|
|
if (id.IsEmpty()) break;
|
|
|
|
nsIContent* dependentContent = iter.GetElem(id);
|
|
if (!dependentContent ||
|
|
(relAttr == nsGkAtoms::aria_owns &&
|
|
!aRelProvider->IsAcceptableChild(dependentContent)))
|
|
continue;
|
|
|
|
AttrRelProviders* providers =
|
|
GetOrCreateRelProviders(dependentContent->AsElement(), id);
|
|
if (providers) {
|
|
AttrRelProvider* provider = new AttrRelProvider(relAttr, relProviderEl);
|
|
if (provider) {
|
|
providers->AppendElement(provider);
|
|
|
|
// We've got here during the children caching. If the referenced
|
|
// content is not accessible then store it to pend its container
|
|
// children invalidation (this happens immediately after the caching
|
|
// is finished).
|
|
if (dependentContent) {
|
|
if (!HasAccessible(dependentContent)) {
|
|
mInvalidationList.AppendElement(dependentContent);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// If the relation attribute is given then we don't have anything else to
|
|
// check.
|
|
if (aRelAttr) break;
|
|
}
|
|
|
|
// Make sure to schedule the tree update if needed.
|
|
mNotificationController->ScheduleProcessing();
|
|
}
|
|
|
|
void DocAccessible::RemoveDependentIDsFor(Accessible* aRelProvider,
|
|
nsAtom* aRelAttr) {
|
|
dom::Element* relProviderElm = aRelProvider->Elm();
|
|
if (!relProviderElm) return;
|
|
|
|
for (uint32_t idx = 0; idx < kRelationAttrsLen; idx++) {
|
|
nsStaticAtom* relAttr = kRelationAttrs[idx];
|
|
if (aRelAttr && aRelAttr != kRelationAttrs[idx]) continue;
|
|
|
|
IDRefsIterator iter(this, relProviderElm, relAttr);
|
|
while (true) {
|
|
const nsDependentSubstring id = iter.NextID();
|
|
if (id.IsEmpty()) break;
|
|
|
|
AttrRelProviders* providers = GetRelProviders(relProviderElm, id);
|
|
if (providers) {
|
|
for (uint32_t jdx = 0; jdx < providers->Length();) {
|
|
AttrRelProvider* provider = (*providers)[jdx];
|
|
if (provider->mRelAttr == relAttr &&
|
|
provider->mContent == relProviderElm)
|
|
providers->RemoveElement(provider);
|
|
else
|
|
jdx++;
|
|
}
|
|
RemoveRelProvidersIfEmpty(relProviderElm, id);
|
|
}
|
|
}
|
|
|
|
// If the relation attribute is given then we don't have anything else to
|
|
// check.
|
|
if (aRelAttr) break;
|
|
}
|
|
}
|
|
|
|
bool DocAccessible::UpdateAccessibleOnAttrChange(dom::Element* aElement,
|
|
nsAtom* aAttribute) {
|
|
if (aAttribute == nsGkAtoms::role) {
|
|
// It is common for js libraries to set the role on the body element after
|
|
// the document has loaded. In this case we just update the role map entry.
|
|
if (mContent == aElement) {
|
|
SetRoleMapEntry(aria::GetRoleMap(aElement));
|
|
if (mIPCDoc) {
|
|
mIPCDoc->SendRoleChangedEvent(Role());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// Recreate the accessible when role is changed because we might require a
|
|
// different accessible class for the new role or the accessible may expose
|
|
// a different sets of interfaces (COM restriction).
|
|
RecreateAccessible(aElement);
|
|
|
|
return true;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::href) {
|
|
// Not worth the expense to ensure which namespace these are in. It doesn't
|
|
// kill use to recreate the accessible even if the attribute was used in
|
|
// the wrong namespace or an element that doesn't support it.
|
|
|
|
// Make sure the accessible is recreated asynchronously to allow the content
|
|
// to handle the attribute change.
|
|
RecreateAccessible(aElement);
|
|
return true;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::aria_multiselectable &&
|
|
aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::role)) {
|
|
// This affects whether the accessible supports SelectAccessible.
|
|
// COM says we cannot change what interfaces are supported on-the-fly,
|
|
// so invalidate this object. A new one will be created on demand.
|
|
RecreateAccessible(aElement);
|
|
|
|
return true;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::type) {
|
|
// If the input[type] changes, we should recreate the accessible.
|
|
RecreateAccessible(aElement);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void DocAccessible::UpdateRootElIfNeeded() {
|
|
dom::Element* rootEl = mDocumentNode->GetBodyElement();
|
|
if (!rootEl) {
|
|
rootEl = mDocumentNode->GetRootElement();
|
|
}
|
|
if (rootEl != mContent) {
|
|
mContent = rootEl;
|
|
SetRoleMapEntry(aria::GetRoleMap(rootEl));
|
|
if (mIPCDoc) {
|
|
mIPCDoc->SendRoleChangedEvent(Role());
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Content insertion helper.
|
|
*/
|
|
class InsertIterator final {
|
|
public:
|
|
InsertIterator(Accessible* aContext,
|
|
const nsTArray<nsCOMPtr<nsIContent>>* aNodes)
|
|
: mChild(nullptr),
|
|
mChildBefore(nullptr),
|
|
mWalker(aContext),
|
|
mNodes(aNodes),
|
|
mNodesIdx(0) {
|
|
MOZ_ASSERT(aContext, "No context");
|
|
MOZ_ASSERT(aNodes, "No nodes to search for accessible elements");
|
|
MOZ_COUNT_CTOR(InsertIterator);
|
|
}
|
|
~InsertIterator() { MOZ_COUNT_DTOR(InsertIterator); }
|
|
|
|
Accessible* Context() const { return mWalker.Context(); }
|
|
Accessible* Child() const { return mChild; }
|
|
Accessible* ChildBefore() const { return mChildBefore; }
|
|
DocAccessible* Document() const { return mWalker.Document(); }
|
|
|
|
/**
|
|
* Iterates to a next accessible within the inserted content.
|
|
*/
|
|
bool Next();
|
|
|
|
void Rejected() {
|
|
mChild = nullptr;
|
|
mChildBefore = nullptr;
|
|
}
|
|
|
|
private:
|
|
Accessible* mChild;
|
|
Accessible* mChildBefore;
|
|
TreeWalker mWalker;
|
|
|
|
const nsTArray<nsCOMPtr<nsIContent>>* mNodes;
|
|
nsTHashtable<nsPtrHashKey<const nsIContent>> mProcessedNodes;
|
|
uint32_t mNodesIdx;
|
|
};
|
|
|
|
bool InsertIterator::Next() {
|
|
if (mNodesIdx > 0) {
|
|
Accessible* nextChild = mWalker.Next();
|
|
if (nextChild) {
|
|
mChildBefore = mChild;
|
|
mChild = nextChild;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
while (mNodesIdx < mNodes->Length()) {
|
|
// Ignore nodes that are not contained by the container anymore.
|
|
|
|
// The container might be changed, for example, because of the subsequent
|
|
// overlapping content insertion (i.e. other content was inserted between
|
|
// this inserted content and its container or the content was reinserted
|
|
// into different container of unrelated part of tree). To avoid a double
|
|
// processing of the content insertion ignore this insertion notification.
|
|
// Note, the inserted content might be not in tree at all at this point
|
|
// what means there's no container. Ignore the insertion too.
|
|
nsIContent* prevNode = mNodes->SafeElementAt(mNodesIdx - 1);
|
|
nsIContent* node = mNodes->ElementAt(mNodesIdx++);
|
|
// Check to see if we already processed this node with this iterator.
|
|
// this can happen if we get two redundant insertions in the case of a
|
|
// text and frame insertion.
|
|
if (!mProcessedNodes.EnsureInserted(node)) {
|
|
continue;
|
|
}
|
|
|
|
Accessible* container = Document()->AccessibleOrTrueContainer(
|
|
node->GetFlattenedTreeParentNode(), true);
|
|
if (container != Context()) {
|
|
continue;
|
|
}
|
|
|
|
// HTML comboboxes have no-content list accessible as an intermediate
|
|
// containing all options.
|
|
if (container->IsHTMLCombobox()) {
|
|
container = container->FirstChild();
|
|
}
|
|
|
|
if (!container->IsAcceptableChild(node)) {
|
|
continue;
|
|
}
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("traversing an inserted node", logging::eVerbose,
|
|
"container", container, "node", node);
|
|
#endif
|
|
|
|
// If inserted nodes are siblings then just move the walker next.
|
|
if (mChild && prevNode && prevNode->GetNextSibling() == node) {
|
|
Accessible* nextChild = mWalker.Scope(node);
|
|
if (nextChild) {
|
|
mChildBefore = mChild;
|
|
mChild = nextChild;
|
|
return true;
|
|
}
|
|
} else {
|
|
TreeWalker finder(container);
|
|
if (finder.Seek(node)) {
|
|
mChild = mWalker.Scope(node);
|
|
if (mChild) {
|
|
MOZ_ASSERT(!mChild->IsRelocated(), "child cannot be aria owned");
|
|
mChildBefore = finder.Prev();
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void DocAccessible::ProcessContentInserted(
|
|
Accessible* aContainer, const nsTArray<nsCOMPtr<nsIContent>>* aNodes) {
|
|
// Process insertions if the container accessible is still in tree.
|
|
if (!aContainer->IsInDocument()) {
|
|
return;
|
|
}
|
|
|
|
// If new root content has been inserted then update it.
|
|
if (aContainer == this) {
|
|
UpdateRootElIfNeeded();
|
|
}
|
|
|
|
InsertIterator iter(aContainer, aNodes);
|
|
if (!iter.Next()) {
|
|
return;
|
|
}
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("children before insertion", logging::eVerbose, aContainer);
|
|
#endif
|
|
|
|
TreeMutation mt(aContainer);
|
|
do {
|
|
Accessible* parent = iter.Child()->Parent();
|
|
if (parent) {
|
|
Accessible* previousSibling = iter.ChildBefore();
|
|
if (parent != aContainer ||
|
|
iter.Child()->PrevSibling() != previousSibling) {
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("relocating accessible", 0, "old parent", parent,
|
|
"new parent", aContainer, "child", iter.Child(),
|
|
nullptr);
|
|
#endif
|
|
MoveChild(iter.Child(), aContainer,
|
|
previousSibling ? previousSibling->IndexInParent() + 1 : 0);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (aContainer->InsertAfter(iter.Child(), iter.ChildBefore())) {
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("accessible was inserted", 0, "container", aContainer,
|
|
"child", iter.Child(), nullptr);
|
|
#endif
|
|
|
|
CreateSubtree(iter.Child());
|
|
mt.AfterInsertion(iter.Child());
|
|
continue;
|
|
}
|
|
|
|
MOZ_ASSERT_UNREACHABLE("accessible was rejected");
|
|
iter.Rejected();
|
|
} while (iter.Next());
|
|
|
|
mt.Done();
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("children after insertion", logging::eVerbose, aContainer);
|
|
#endif
|
|
|
|
FireEventsOnInsertion(aContainer);
|
|
}
|
|
|
|
void DocAccessible::ProcessContentInserted(Accessible* aContainer,
|
|
nsIContent* aNode) {
|
|
if (!aContainer->IsInDocument()) {
|
|
return;
|
|
}
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("children before insertion", logging::eVerbose, aContainer);
|
|
#endif
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("traversing an inserted node", logging::eVerbose,
|
|
"container", aContainer, "node", aNode);
|
|
#endif
|
|
|
|
TreeWalker walker(aContainer);
|
|
if (aContainer->IsAcceptableChild(aNode) && walker.Seek(aNode)) {
|
|
Accessible* child = GetAccessible(aNode);
|
|
if (!child) {
|
|
child = GetAccService()->CreateAccessible(aNode, aContainer);
|
|
}
|
|
|
|
if (child) {
|
|
TreeMutation mt(aContainer);
|
|
if (!aContainer->InsertAfter(child, walker.Prev())) {
|
|
return;
|
|
}
|
|
CreateSubtree(child);
|
|
mt.AfterInsertion(child);
|
|
mt.Done();
|
|
|
|
FireEventsOnInsertion(aContainer);
|
|
}
|
|
}
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("children after insertion", logging::eVerbose, aContainer);
|
|
#endif
|
|
}
|
|
|
|
void DocAccessible::FireEventsOnInsertion(Accessible* aContainer) {
|
|
// Check to see if change occurred inside an alert, and fire an EVENT_ALERT
|
|
// if it did.
|
|
if (aContainer->IsAlert() || aContainer->IsInsideAlert()) {
|
|
Accessible* ancestor = aContainer;
|
|
do {
|
|
if (ancestor->IsAlert()) {
|
|
FireDelayedEvent(nsIAccessibleEvent::EVENT_ALERT, ancestor);
|
|
break;
|
|
}
|
|
} while ((ancestor = ancestor->Parent()));
|
|
}
|
|
}
|
|
|
|
void DocAccessible::ContentRemoved(Accessible* aChild) {
|
|
Accessible* parent = aChild->Parent();
|
|
MOZ_DIAGNOSTIC_ASSERT(parent, "Unattached accessible from tree");
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("process content removal", 0, "container", parent, "child",
|
|
aChild, nullptr);
|
|
#endif
|
|
|
|
// XXX: event coalescence may kill us
|
|
RefPtr<Accessible> kungFuDeathGripChild(aChild);
|
|
|
|
TreeMutation mt(parent);
|
|
mt.BeforeRemoval(aChild);
|
|
|
|
if (aChild->IsDefunct()) {
|
|
MOZ_ASSERT_UNREACHABLE("Event coalescence killed the accessible");
|
|
mt.Done();
|
|
return;
|
|
}
|
|
|
|
MOZ_DIAGNOSTIC_ASSERT(aChild->Parent(), "Alive but unparented #1");
|
|
|
|
if (aChild->IsRelocated()) {
|
|
nsTArray<RefPtr<Accessible>>* owned = mARIAOwnsHash.Get(parent);
|
|
MOZ_ASSERT(owned, "IsRelocated flag is out of sync with mARIAOwnsHash");
|
|
owned->RemoveElement(aChild);
|
|
if (owned->Length() == 0) {
|
|
mARIAOwnsHash.Remove(parent);
|
|
}
|
|
}
|
|
MOZ_DIAGNOSTIC_ASSERT(aChild->Parent(), "Unparented #2");
|
|
parent->RemoveChild(aChild);
|
|
UncacheChildrenInSubtree(aChild);
|
|
|
|
mt.Done();
|
|
}
|
|
|
|
void DocAccessible::ContentRemoved(nsIContent* aContentNode) {
|
|
// If child node is not accessible then look for its accessible children.
|
|
Accessible* acc = GetAccessible(aContentNode);
|
|
if (acc) {
|
|
ContentRemoved(acc);
|
|
}
|
|
|
|
dom::AllChildrenIterator iter =
|
|
dom::AllChildrenIterator(aContentNode, nsIContent::eAllChildren, true);
|
|
while (nsIContent* childNode = iter.GetNextChild()) {
|
|
ContentRemoved(childNode);
|
|
}
|
|
|
|
// If this node has a shadow root, remove its explicit children too.
|
|
// The host node may be removed after the shadow root was attached, and
|
|
// before we asynchronously prune the light DOM and construct the shadow DOM.
|
|
// If this is a case where the node does not have its own accessible, we will
|
|
// not recurse into its current children, so we need to use an
|
|
// ExplicitChildIterator in order to get its accessible children in the light
|
|
// DOM, since they are not accessible anymore via AllChildrenIterator.
|
|
if (aContentNode->GetShadowRoot()) {
|
|
dom::ExplicitChildIterator iter = dom::ExplicitChildIterator(aContentNode);
|
|
while (nsIContent* childNode = iter.GetNextChild()) {
|
|
ContentRemoved(childNode);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool DocAccessible::RelocateARIAOwnedIfNeeded(nsIContent* aElement) {
|
|
if (!aElement->HasID()) return false;
|
|
|
|
AttrRelProviders* list = GetRelProviders(
|
|
aElement->AsElement(), nsDependentAtomString(aElement->GetID()));
|
|
if (list) {
|
|
for (uint32_t idx = 0; idx < list->Length(); idx++) {
|
|
if (list->ElementAt(idx)->mRelAttr == nsGkAtoms::aria_owns) {
|
|
Accessible* owner = GetAccessible(list->ElementAt(idx)->mContent);
|
|
if (owner) {
|
|
mNotificationController->ScheduleRelocation(owner);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void DocAccessible::DoARIAOwnsRelocation(Accessible* aOwner) {
|
|
MOZ_ASSERT(aOwner, "aOwner must be a valid pointer");
|
|
MOZ_ASSERT(aOwner->Elm(), "aOwner->Elm() must be a valid pointer");
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("aria owns relocation", logging::eVerbose, aOwner);
|
|
#endif
|
|
|
|
nsTArray<RefPtr<Accessible>>* owned = mARIAOwnsHash.LookupOrAdd(aOwner);
|
|
|
|
IDRefsIterator iter(this, aOwner->Elm(), nsGkAtoms::aria_owns);
|
|
uint32_t idx = 0;
|
|
while (nsIContent* childEl = iter.NextElem()) {
|
|
Accessible* child = GetAccessible(childEl);
|
|
auto insertIdx = aOwner->ChildCount() - owned->Length() + idx;
|
|
|
|
// Make an attempt to create an accessible if it wasn't created yet.
|
|
if (!child) {
|
|
// An owned child cannot be an ancestor of the owner.
|
|
if (aOwner->Elm()->IsInclusiveDescendantOf(childEl)) {
|
|
continue;
|
|
}
|
|
|
|
if (aOwner->IsAcceptableChild(childEl)) {
|
|
child = GetAccService()->CreateAccessible(childEl, aOwner);
|
|
if (child) {
|
|
TreeMutation imut(aOwner);
|
|
aOwner->InsertChildAt(insertIdx, child);
|
|
imut.AfterInsertion(child);
|
|
imut.Done();
|
|
|
|
child->SetRelocated(true);
|
|
owned->InsertElementAt(idx, child);
|
|
idx++;
|
|
|
|
// Create subtree before adjusting the insertion index, since subtree
|
|
// creation may alter children in the container.
|
|
CreateSubtree(child);
|
|
FireEventsOnInsertion(aOwner);
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("aria owns traversal", logging::eVerbose, "candidate",
|
|
child, nullptr);
|
|
#endif
|
|
|
|
if (owned->IndexOf(child) < idx) {
|
|
continue; // ignore second entry of same ID
|
|
}
|
|
|
|
// Same child on same position, no change.
|
|
if (child->Parent() == aOwner) {
|
|
int32_t indexInParent = child->IndexInParent();
|
|
|
|
// The child is being placed in its current index,
|
|
// eg. aria-owns='id1 id2 id3' is changed to aria-owns='id3 id2 id1'.
|
|
if (indexInParent == static_cast<int32_t>(insertIdx)) {
|
|
MOZ_ASSERT(child->IsRelocated(),
|
|
"A child, having an index in parent from aria ownded "
|
|
"indices range, has to be aria owned");
|
|
MOZ_ASSERT(owned->ElementAt(idx) == child,
|
|
"Unexpected child in ARIA owned array");
|
|
idx++;
|
|
continue;
|
|
}
|
|
|
|
// The child is being inserted directly after its current index,
|
|
// resulting in a no-move case. This will happen when a parent aria-owns
|
|
// its last ordinal child:
|
|
// <ul aria-owns='id2'><li id='id1'></li><li id='id2'></li></ul>
|
|
if (indexInParent == static_cast<int32_t>(insertIdx) - 1) {
|
|
MOZ_ASSERT(!child->IsRelocated(),
|
|
"Child should be in its ordinal position");
|
|
child->SetRelocated(true);
|
|
owned->InsertElementAt(idx, child);
|
|
idx++;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
MOZ_ASSERT(owned->SafeElementAt(idx) != child, "Already in place!");
|
|
|
|
// A new child is found, check for loops.
|
|
if (child->Parent() != aOwner) {
|
|
// Child is aria-owned by another container, skip.
|
|
if (child->IsRelocated()) {
|
|
continue;
|
|
}
|
|
|
|
Accessible* parent = aOwner;
|
|
while (parent && parent != child && !parent->IsDoc()) {
|
|
parent = parent->Parent();
|
|
}
|
|
// A referred child cannot be a parent of the owner.
|
|
if (parent == child) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (MoveChild(child, aOwner, insertIdx)) {
|
|
child->SetRelocated(true);
|
|
MOZ_ASSERT(owned == mARIAOwnsHash.Get(aOwner));
|
|
owned = mARIAOwnsHash.LookupOrAdd(aOwner);
|
|
owned->InsertElementAt(idx, child);
|
|
idx++;
|
|
}
|
|
}
|
|
|
|
// Put back children that are not seized anymore.
|
|
PutChildrenBack(owned, idx);
|
|
if (owned->Length() == 0) {
|
|
mARIAOwnsHash.Remove(aOwner);
|
|
}
|
|
}
|
|
|
|
void DocAccessible::PutChildrenBack(nsTArray<RefPtr<Accessible>>* aChildren,
|
|
uint32_t aStartIdx) {
|
|
MOZ_ASSERT(aStartIdx <= aChildren->Length(), "Wrong removal index");
|
|
|
|
for (auto idx = aStartIdx; idx < aChildren->Length(); idx++) {
|
|
Accessible* child = aChildren->ElementAt(idx);
|
|
if (!child->IsInDocument()) {
|
|
continue;
|
|
}
|
|
|
|
// Remove the child from the owner
|
|
Accessible* owner = child->Parent();
|
|
if (!owner) {
|
|
NS_ERROR("Cannot put the child back. No parent, a broken tree.");
|
|
continue;
|
|
}
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("aria owns put child back", 0, "old parent", owner,
|
|
"child", child, nullptr);
|
|
#endif
|
|
|
|
// Unset relocated flag to find an insertion point for the child.
|
|
child->SetRelocated(false);
|
|
|
|
nsIContent* content = child->GetContent();
|
|
int32_t idxInParent = -1;
|
|
Accessible* origContainer =
|
|
AccessibleOrTrueContainer(content->GetFlattenedTreeParentNode());
|
|
if (origContainer) {
|
|
TreeWalker walker(origContainer);
|
|
if (walker.Seek(content)) {
|
|
Accessible* prevChild = walker.Prev();
|
|
if (prevChild) {
|
|
idxInParent = prevChild->IndexInParent() + 1;
|
|
MOZ_DIAGNOSTIC_ASSERT(origContainer == prevChild->Parent(),
|
|
"Broken tree");
|
|
origContainer = prevChild->Parent();
|
|
} else {
|
|
idxInParent = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
// The child may have already be in its ordinal place for 2 reasons:
|
|
// 1. It was the last ordinal child, and the first aria-owned child.
|
|
// given: <ul id="list" aria-owns="b"><li id="a"></li><li
|
|
// id="b"></li></ul> after load: $("list").setAttribute("aria-owns", "");
|
|
// 2. The preceding adopted children were just reclaimed, eg:
|
|
// given: <ul id="list"><li id="b"></li></ul>
|
|
// after load: $("list").setAttribute("aria-owns", "a b");
|
|
// later: $("list").setAttribute("aria-owns", "");
|
|
if (origContainer != owner || child->IndexInParent() != idxInParent) {
|
|
DebugOnly<bool> moved = MoveChild(child, origContainer, idxInParent);
|
|
MOZ_ASSERT(moved, "Failed to put child back.");
|
|
} else {
|
|
MOZ_ASSERT(!child->PrevSibling() || !child->PrevSibling()->IsRelocated(),
|
|
"No relocated child should appear before this one");
|
|
MOZ_ASSERT(!child->NextSibling() || child->NextSibling()->IsRelocated(),
|
|
"No ordinal child should appear after this one");
|
|
}
|
|
}
|
|
|
|
aChildren->RemoveElementsAt(aStartIdx, aChildren->Length() - aStartIdx);
|
|
}
|
|
|
|
bool DocAccessible::MoveChild(Accessible* aChild, Accessible* aNewParent,
|
|
int32_t aIdxInParent) {
|
|
MOZ_ASSERT(aChild, "No child");
|
|
MOZ_ASSERT(aChild->Parent(), "No parent");
|
|
// We can't guarantee MoveChild works correctly for accessibilities storing
|
|
// children outside mChildren.
|
|
MOZ_ASSERT(
|
|
aIdxInParent <= static_cast<int32_t>(aNewParent->mChildren.Length()),
|
|
"Wrong insertion point for a moving child");
|
|
|
|
Accessible* curParent = aChild->Parent();
|
|
|
|
if (!aNewParent->IsAcceptableChild(aChild->GetContent())) {
|
|
return false;
|
|
}
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("move child", 0, "old parent", curParent, "new parent",
|
|
aNewParent, "child", aChild, nullptr);
|
|
#endif
|
|
|
|
// Forget aria-owns info in case of ARIA owned element. The caller is expected
|
|
// to update it if needed.
|
|
if (aChild->IsRelocated()) {
|
|
aChild->SetRelocated(false);
|
|
nsTArray<RefPtr<Accessible>>* owned = mARIAOwnsHash.Get(curParent);
|
|
MOZ_ASSERT(owned, "IsRelocated flag is out of sync with mARIAOwnsHash");
|
|
owned->RemoveElement(aChild);
|
|
if (owned->Length() == 0) {
|
|
mARIAOwnsHash.Remove(curParent);
|
|
}
|
|
}
|
|
|
|
NotificationController::MoveGuard mguard(mNotificationController);
|
|
|
|
if (curParent == aNewParent) {
|
|
MOZ_ASSERT(aChild->IndexInParent() != aIdxInParent, "No move case");
|
|
curParent->RelocateChild(aIdxInParent, aChild);
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("move child: parent tree after", logging::eVerbose,
|
|
curParent);
|
|
#endif
|
|
return true;
|
|
}
|
|
|
|
// If the child cannot be re-inserted into the tree, then make sure to remove
|
|
// it from its present parent and then shutdown it.
|
|
bool hasInsertionPoint =
|
|
(aIdxInParent >= 0) &&
|
|
(aIdxInParent <= static_cast<int32_t>(aNewParent->mChildren.Length()));
|
|
|
|
TreeMutation rmut(curParent);
|
|
rmut.BeforeRemoval(aChild, hasInsertionPoint && TreeMutation::kNoShutdown);
|
|
curParent->RemoveChild(aChild);
|
|
rmut.Done();
|
|
|
|
// No insertion point for the child.
|
|
if (!hasInsertionPoint) {
|
|
return true;
|
|
}
|
|
|
|
TreeMutation imut(aNewParent);
|
|
aNewParent->InsertChildAt(aIdxInParent, aChild);
|
|
imut.AfterInsertion(aChild);
|
|
imut.Done();
|
|
|
|
#ifdef A11Y_LOG
|
|
logging::TreeInfo("move child: old parent tree after", logging::eVerbose,
|
|
curParent);
|
|
logging::TreeInfo("move child: new parent tree after", logging::eVerbose,
|
|
aNewParent);
|
|
#endif
|
|
|
|
return true;
|
|
}
|
|
|
|
void DocAccessible::CacheChildrenInSubtree(Accessible* aRoot,
|
|
Accessible** aFocusedAcc) {
|
|
// If the accessible is focused then report a focus event after all related
|
|
// mutation events.
|
|
if (aFocusedAcc && !*aFocusedAcc &&
|
|
FocusMgr()->HasDOMFocus(aRoot->GetContent()))
|
|
*aFocusedAcc = aRoot;
|
|
|
|
Accessible* root = aRoot->IsHTMLCombobox() ? aRoot->FirstChild() : aRoot;
|
|
if (root->KidsFromDOM()) {
|
|
TreeMutation mt(root, TreeMutation::kNoEvents);
|
|
TreeWalker walker(root);
|
|
while (Accessible* child = walker.Next()) {
|
|
if (child->IsBoundToParent()) {
|
|
MoveChild(child, root, root->mChildren.Length());
|
|
continue;
|
|
}
|
|
|
|
root->AppendChild(child);
|
|
mt.AfterInsertion(child);
|
|
|
|
CacheChildrenInSubtree(child, aFocusedAcc);
|
|
}
|
|
mt.Done();
|
|
}
|
|
|
|
// Fire events for ARIA elements.
|
|
if (!aRoot->HasARIARole()) {
|
|
return;
|
|
}
|
|
|
|
// XXX: we should delay document load complete event if the ARIA document
|
|
// has aria-busy.
|
|
roles::Role role = aRoot->ARIARole();
|
|
if (!aRoot->IsDoc() &&
|
|
(role == roles::DIALOG || role == roles::NON_NATIVE_DOCUMENT)) {
|
|
FireDelayedEvent(nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_COMPLETE, aRoot);
|
|
}
|
|
}
|
|
|
|
void DocAccessible::UncacheChildrenInSubtree(Accessible* aRoot) {
|
|
aRoot->mStateFlags |= eIsNotInDocument;
|
|
RemoveDependentIDsFor(aRoot);
|
|
|
|
nsTArray<RefPtr<Accessible>>* owned = mARIAOwnsHash.Get(aRoot);
|
|
uint32_t count = aRoot->ContentChildCount();
|
|
for (uint32_t idx = 0; idx < count; idx++) {
|
|
Accessible* child = aRoot->ContentChildAt(idx);
|
|
|
|
if (child->IsRelocated()) {
|
|
MOZ_ASSERT(owned, "IsRelocated flag is out of sync with mARIAOwnsHash");
|
|
owned->RemoveElement(child);
|
|
if (owned->Length() == 0) {
|
|
mARIAOwnsHash.Remove(aRoot);
|
|
owned = nullptr;
|
|
}
|
|
}
|
|
|
|
// Removing this accessible from the document doesn't mean anything about
|
|
// accessibles for subdocuments, so skip removing those from the tree.
|
|
if (!child->IsDoc()) {
|
|
UncacheChildrenInSubtree(child);
|
|
}
|
|
}
|
|
|
|
if (aRoot->IsNodeMapEntry() &&
|
|
mNodeToAccessibleMap.Get(aRoot->GetNode()) == aRoot)
|
|
mNodeToAccessibleMap.Remove(aRoot->GetNode());
|
|
}
|
|
|
|
void DocAccessible::ShutdownChildrenInSubtree(Accessible* aAccessible) {
|
|
// Traverse through children and shutdown them before this accessible. When
|
|
// child gets shutdown then it removes itself from children array of its
|
|
// parent. Use jdx index to process the cases if child is not attached to the
|
|
// parent and as result doesn't remove itself from its children.
|
|
uint32_t count = aAccessible->ContentChildCount();
|
|
for (uint32_t idx = 0, jdx = 0; idx < count; idx++) {
|
|
Accessible* child = aAccessible->ContentChildAt(jdx);
|
|
if (!child->IsBoundToParent()) {
|
|
NS_ERROR("Parent refers to a child, child doesn't refer to parent!");
|
|
jdx++;
|
|
}
|
|
|
|
// Don't cross document boundaries. The outerdoc shutdown takes care about
|
|
// its subdocument.
|
|
if (!child->IsDoc()) ShutdownChildrenInSubtree(child);
|
|
}
|
|
|
|
UnbindFromDocument(aAccessible);
|
|
}
|
|
|
|
bool DocAccessible::IsLoadEventTarget() const {
|
|
nsCOMPtr<nsIDocShellTreeItem> treeItem = mDocumentNode->GetDocShell();
|
|
NS_ASSERTION(treeItem, "No document shell for document!");
|
|
|
|
nsCOMPtr<nsIDocShellTreeItem> parentTreeItem;
|
|
treeItem->GetInProcessParent(getter_AddRefs(parentTreeItem));
|
|
|
|
// Not a root document.
|
|
if (parentTreeItem) {
|
|
// Return true if it's either:
|
|
// a) tab document;
|
|
nsCOMPtr<nsIDocShellTreeItem> rootTreeItem;
|
|
treeItem->GetInProcessRootTreeItem(getter_AddRefs(rootTreeItem));
|
|
if (parentTreeItem == rootTreeItem) return true;
|
|
|
|
// b) frame/iframe document and its parent document is not in loading state
|
|
// Note: we can get notifications while document is loading (and thus
|
|
// while there's no parent document yet).
|
|
DocAccessible* parentDoc = ParentDocument();
|
|
return parentDoc && parentDoc->HasLoadState(eCompletelyLoaded);
|
|
}
|
|
|
|
// It's content (not chrome) root document.
|
|
return (treeItem->ItemType() == nsIDocShellTreeItem::typeContent);
|
|
}
|
|
|
|
void DocAccessible::SetIPCDoc(DocAccessibleChild* aIPCDoc) {
|
|
MOZ_ASSERT(!mIPCDoc || !aIPCDoc, "Clobbering an attached IPCDoc!");
|
|
mIPCDoc = aIPCDoc;
|
|
}
|
|
|
|
void DocAccessible::DispatchScrollingEvent(uint32_t aEventType) {
|
|
nsIScrollableFrame* sf = mPresShell->GetRootScrollFrameAsScrollable();
|
|
if (!sf) {
|
|
return;
|
|
}
|
|
|
|
int32_t appUnitsPerDevPixel =
|
|
mPresShell->GetPresContext()->AppUnitsPerDevPixel();
|
|
LayoutDevicePoint scrollPoint =
|
|
LayoutDevicePoint::FromAppUnits(sf->GetScrollPosition(),
|
|
appUnitsPerDevPixel) *
|
|
mPresShell->GetResolution();
|
|
|
|
LayoutDeviceRect scrollRange =
|
|
LayoutDeviceRect::FromAppUnits(sf->GetScrollRange(), appUnitsPerDevPixel);
|
|
scrollRange.ScaleRoundOut(mPresShell->GetResolution());
|
|
|
|
RefPtr<AccEvent> event =
|
|
new AccScrollingEvent(aEventType, this, scrollPoint.x, scrollPoint.y,
|
|
scrollRange.width, scrollRange.height);
|
|
|
|
nsEventShell::FireEvent(event);
|
|
}
|
|
|
|
void DocAccessible::ARIAActiveDescendantIDMaybeMoved(dom::Element* aElm) {
|
|
nsINode* focusNode = FocusMgr()->FocusedDOMNode();
|
|
// The focused element must be within this document.
|
|
if (!focusNode || focusNode->OwnerDoc() != mDocumentNode) {
|
|
return;
|
|
}
|
|
|
|
dom::Element* focusElm = nullptr;
|
|
if (focusNode == mDocumentNode) {
|
|
// The document is focused, so look for aria-activedescendant on the
|
|
// body/root.
|
|
focusElm = Elm();
|
|
if (!focusElm) {
|
|
return;
|
|
}
|
|
} else {
|
|
MOZ_ASSERT(focusNode->IsElement());
|
|
focusElm = focusNode->AsElement();
|
|
}
|
|
|
|
// Check if the focus has aria-activedescendant and whether
|
|
// it refers to the id just set on aElm.
|
|
nsAutoString id;
|
|
aElm->GetAttr(kNameSpaceID_None, nsGkAtoms::id, id);
|
|
if (!focusElm->AttrValueIs(kNameSpaceID_None,
|
|
nsGkAtoms::aria_activedescendant, id,
|
|
eCaseMatters)) {
|
|
return;
|
|
}
|
|
|
|
// The aria-activedescendant target has probably changed.
|
|
Accessible* acc = GetAccessibleEvenIfNotInMapOrContainer(focusNode);
|
|
if (!acc) {
|
|
return;
|
|
}
|
|
|
|
// The active descendant might have just been inserted and may not be in the
|
|
// tree yet. Therefore, schedule this async to ensure the tree is up to date.
|
|
mNotificationController->ScheduleNotification<DocAccessible, Accessible>(
|
|
this, &DocAccessible::ARIAActiveDescendantChanged, acc);
|
|
}
|