mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-09 03:15:11 +00:00
9de72a3ac6
Differential Revision: https://phabricator.services.mozilla.com/D34196 --HG-- extra : moz-landing-system : lando
702 lines
22 KiB
C++
702 lines
22 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "AccessibleWrap.h"
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#include "Accessible-inl.h"
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#include "AndroidInputType.h"
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#include "DocAccessibleWrap.h"
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#include "IDSet.h"
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#include "JavaBuiltins.h"
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#include "SessionAccessibility.h"
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#include "nsAccessibilityService.h"
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#include "nsPersistentProperties.h"
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#include "nsIAccessibleAnnouncementEvent.h"
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#include "nsIStringBundle.h"
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#include "nsAccUtils.h"
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#include "nsTextEquivUtils.h"
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#include "mozilla/a11y/PDocAccessibleChild.h"
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#include "mozilla/jni/GeckoBundleUtils.h"
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#define ROLE_STRINGS_URL "chrome://global/locale/AccessFu.properties"
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using namespace mozilla::a11y;
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// IDs should be a positive 32bit integer.
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IDSet sIDSet(31UL);
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//-----------------------------------------------------
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// construction
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//-----------------------------------------------------
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AccessibleWrap::AccessibleWrap(nsIContent* aContent, DocAccessible* aDoc)
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: Accessible(aContent, aDoc) {
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if (aDoc) {
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mID = AcquireID();
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DocAccessibleWrap* doc = static_cast<DocAccessibleWrap*>(aDoc);
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doc->AddID(mID, this);
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}
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}
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//-----------------------------------------------------
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// destruction
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//-----------------------------------------------------
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AccessibleWrap::~AccessibleWrap() {}
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nsresult AccessibleWrap::HandleAccEvent(AccEvent* aEvent) {
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auto accessible = static_cast<AccessibleWrap*>(aEvent->GetAccessible());
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NS_ENSURE_TRUE(accessible, NS_ERROR_FAILURE);
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DocAccessibleWrap* doc =
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static_cast<DocAccessibleWrap*>(accessible->Document());
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if (doc) {
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switch (aEvent->GetEventType()) {
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case nsIAccessibleEvent::EVENT_FOCUS: {
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if (DocAccessibleWrap* topContentDoc =
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doc->GetTopLevelContentDoc(accessible)) {
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topContentDoc->CacheFocusPath(accessible);
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}
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break;
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}
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case nsIAccessibleEvent::EVENT_VIRTUALCURSOR_CHANGED: {
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AccVCChangeEvent* vcEvent = downcast_accEvent(aEvent);
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auto newPosition =
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static_cast<AccessibleWrap*>(vcEvent->NewAccessible());
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if (newPosition) {
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if (DocAccessibleWrap* topContentDoc =
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doc->GetTopLevelContentDoc(accessible)) {
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topContentDoc->CacheFocusPath(newPosition);
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}
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}
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break;
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}
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case nsIAccessibleEvent::EVENT_SHOW:
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case nsIAccessibleEvent::EVENT_HIDE: {
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if (DocAccessibleWrap* topContentDoc =
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doc->GetTopLevelContentDoc(accessible)) {
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topContentDoc->CacheViewport();
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}
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break;
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}
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default:
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break;
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}
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}
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nsresult rv = Accessible::HandleAccEvent(aEvent);
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NS_ENSURE_SUCCESS(rv, rv);
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accessible->HandleLiveRegionEvent(aEvent);
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if (IPCAccessibilityActive()) {
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return NS_OK;
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}
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// The accessible can become defunct if we have an xpcom event listener
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// which decides it would be fun to change the DOM and flush layout.
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if (accessible->IsDefunct() || !accessible->IsBoundToParent()) {
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return NS_OK;
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}
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if (doc) {
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if (!nsCoreUtils::IsContentDocument(doc->DocumentNode())) {
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return NS_OK;
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}
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}
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RefPtr<SessionAccessibility> sessionAcc =
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SessionAccessibility::GetInstanceFor(accessible);
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if (!sessionAcc) {
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return NS_OK;
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}
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switch (aEvent->GetEventType()) {
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case nsIAccessibleEvent::EVENT_FOCUS:
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sessionAcc->SendFocusEvent(accessible);
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break;
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case nsIAccessibleEvent::EVENT_VIRTUALCURSOR_CHANGED: {
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AccVCChangeEvent* vcEvent = downcast_accEvent(aEvent);
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RefPtr<AccessibleWrap> newPosition =
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static_cast<AccessibleWrap*>(vcEvent->NewAccessible());
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auto oldPosition = static_cast<AccessibleWrap*>(vcEvent->OldAccessible());
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if (sessionAcc && newPosition) {
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if (oldPosition != newPosition) {
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if (vcEvent->Reason() == nsIAccessiblePivot::REASON_POINT) {
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sessionAcc->SendHoverEnterEvent(newPosition);
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} else {
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sessionAcc->SendAccessibilityFocusedEvent(newPosition);
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}
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}
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if (vcEvent->BoundaryType() != nsIAccessiblePivot::NO_BOUNDARY) {
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sessionAcc->SendTextTraversedEvent(
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newPosition, vcEvent->NewStartOffset(), vcEvent->NewEndOffset());
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}
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}
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break;
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}
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case nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED: {
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AccCaretMoveEvent* event = downcast_accEvent(aEvent);
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sessionAcc->SendTextSelectionChangedEvent(accessible,
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event->GetCaretOffset());
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break;
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}
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case nsIAccessibleEvent::EVENT_TEXT_INSERTED:
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case nsIAccessibleEvent::EVENT_TEXT_REMOVED: {
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AccTextChangeEvent* event = downcast_accEvent(aEvent);
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sessionAcc->SendTextChangedEvent(
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accessible, event->ModifiedText(), event->GetStartOffset(),
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event->GetLength(), event->IsTextInserted(),
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event->IsFromUserInput());
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break;
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}
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case nsIAccessibleEvent::EVENT_STATE_CHANGE: {
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AccStateChangeEvent* event = downcast_accEvent(aEvent);
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auto state = event->GetState();
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if (state & states::CHECKED) {
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sessionAcc->SendClickedEvent(accessible, event->IsStateEnabled());
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}
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if (state & states::SELECTED) {
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sessionAcc->SendSelectedEvent(accessible, event->IsStateEnabled());
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}
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if (state & states::BUSY) {
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sessionAcc->SendWindowStateChangedEvent(accessible);
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}
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break;
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}
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case nsIAccessibleEvent::EVENT_SCROLLING: {
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AccScrollingEvent* event = downcast_accEvent(aEvent);
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sessionAcc->SendScrollingEvent(accessible, event->ScrollX(),
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event->ScrollY(), event->MaxScrollX(),
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event->MaxScrollY());
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break;
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}
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case nsIAccessibleEvent::EVENT_ANNOUNCEMENT: {
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AccAnnouncementEvent* event = downcast_accEvent(aEvent);
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sessionAcc->SendAnnouncementEvent(accessible, event->Announcement(),
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event->Priority());
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break;
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}
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default:
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break;
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}
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return NS_OK;
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}
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void AccessibleWrap::Shutdown() {
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if (mDoc) {
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if (mID > 0) {
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if (auto doc = static_cast<DocAccessibleWrap*>(mDoc.get())) {
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doc->RemoveID(mID);
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}
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ReleaseID(mID);
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mID = 0;
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}
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}
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Accessible::Shutdown();
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}
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bool AccessibleWrap::DoAction(uint8_t aIndex) const {
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if (ActionCount()) {
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return Accessible::DoAction(aIndex);
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}
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if (mContent) {
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// We still simulate a click on an accessible even if there is no
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// known actions. For the sake of bad markup.
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DoCommand();
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return true;
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}
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return false;
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}
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int32_t AccessibleWrap::AcquireID() { return sIDSet.GetID(); }
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void AccessibleWrap::ReleaseID(int32_t aID) { sIDSet.ReleaseID(aID); }
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void AccessibleWrap::SetTextContents(const nsAString& aText) {
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if (IsHyperText()) {
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AsHyperText()->ReplaceText(aText);
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}
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}
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void AccessibleWrap::GetTextContents(nsAString& aText) {
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// For now it is a simple wrapper for getting entire range of TextSubstring.
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// In the future this may be smarter and retrieve a flattened string.
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if (IsHyperText()) {
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AsHyperText()->TextSubstring(0, -1, aText);
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}
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}
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bool AccessibleWrap::GetSelectionBounds(int32_t* aStartOffset,
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int32_t* aEndOffset) {
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if (IsHyperText()) {
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return AsHyperText()->SelectionBoundsAt(0, aStartOffset, aEndOffset);
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}
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return false;
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}
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uint32_t AccessibleWrap::GetFlags(role aRole, uint64_t aState,
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uint8_t aActionCount) {
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uint32_t flags = 0;
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if (aState & states::CHECKABLE) {
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flags |= java::SessionAccessibility::FLAG_CHECKABLE;
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}
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if (aState & states::CHECKED) {
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flags |= java::SessionAccessibility::FLAG_CHECKED;
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}
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if (aState & states::INVALID) {
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flags |= java::SessionAccessibility::FLAG_CONTENT_INVALID;
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}
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if (aState & states::EDITABLE) {
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flags |= java::SessionAccessibility::FLAG_EDITABLE;
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}
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if (aActionCount && aRole != roles::TEXT_LEAF) {
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flags |= java::SessionAccessibility::FLAG_CLICKABLE;
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}
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if (aState & states::ENABLED) {
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flags |= java::SessionAccessibility::FLAG_ENABLED;
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}
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if (aState & states::FOCUSABLE) {
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flags |= java::SessionAccessibility::FLAG_FOCUSABLE;
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}
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if (aState & states::FOCUSED) {
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flags |= java::SessionAccessibility::FLAG_FOCUSED;
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}
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if (aState & states::MULTI_LINE) {
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flags |= java::SessionAccessibility::FLAG_MULTI_LINE;
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}
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if (aState & states::SELECTABLE) {
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flags |= java::SessionAccessibility::FLAG_SELECTABLE;
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}
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if (aState & states::SELECTED) {
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flags |= java::SessionAccessibility::FLAG_SELECTED;
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}
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if ((aState & (states::INVISIBLE | states::OFFSCREEN)) == 0) {
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flags |= java::SessionAccessibility::FLAG_VISIBLE_TO_USER;
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}
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if (aRole == roles::PASSWORD_TEXT) {
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flags |= java::SessionAccessibility::FLAG_PASSWORD;
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}
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return flags;
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}
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void AccessibleWrap::GetRoleDescription(role aRole,
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nsIPersistentProperties* aAttributes,
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nsAString& aGeckoRole,
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nsAString& aRoleDescription) {
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nsresult rv = NS_OK;
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nsCOMPtr<nsIStringBundleService> sbs =
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do_GetService(NS_STRINGBUNDLE_CONTRACTID, &rv);
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if (NS_FAILED(rv)) {
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NS_WARNING("Failed to get string bundle service");
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return;
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}
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nsCOMPtr<nsIStringBundle> bundle;
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rv = sbs->CreateBundle(ROLE_STRINGS_URL, getter_AddRefs(bundle));
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if (NS_FAILED(rv)) {
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NS_WARNING("Failed to get string bundle");
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return;
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}
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if (aRole == roles::HEADING && aAttributes) {
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// The heading level is an attribute, so we need that.
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AutoTArray<nsString, 1> formatString;
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rv = aAttributes->GetStringProperty(NS_LITERAL_CSTRING("level"),
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*formatString.AppendElement());
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if (NS_SUCCEEDED(rv)) {
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rv = bundle->FormatStringFromName("headingLevel", formatString,
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aRoleDescription);
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if (NS_SUCCEEDED(rv)) {
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return;
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}
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}
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}
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GetAccService()->GetStringRole(aRole, aGeckoRole);
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rv = bundle->GetStringFromName(NS_ConvertUTF16toUTF8(aGeckoRole).get(),
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aRoleDescription);
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if (NS_FAILED(rv)) {
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aRoleDescription.AssignLiteral("");
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}
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}
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already_AddRefed<nsIPersistentProperties>
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AccessibleWrap::AttributeArrayToProperties(
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const nsTArray<Attribute>& aAttributes) {
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RefPtr<nsPersistentProperties> props = new nsPersistentProperties();
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nsAutoString unused;
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for (size_t i = 0; i < aAttributes.Length(); i++) {
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props->SetStringProperty(aAttributes.ElementAt(i).Name(),
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aAttributes.ElementAt(i).Value(), unused);
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}
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return props.forget();
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}
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int32_t AccessibleWrap::GetAndroidClass(role aRole) {
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#define ROLE(geckoRole, stringRole, atkRole, macRole, msaaRole, ia2Role, \
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androidClass, nameRule) \
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case roles::geckoRole: \
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return androidClass;
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switch (aRole) {
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#include "RoleMap.h"
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default:
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return java::SessionAccessibility::CLASSNAME_VIEW;
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}
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#undef ROLE
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}
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int32_t AccessibleWrap::GetInputType(const nsString& aInputTypeAttr) {
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if (aInputTypeAttr.EqualsIgnoreCase("email")) {
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return java::sdk::InputType::TYPE_CLASS_TEXT |
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java::sdk::InputType::TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS;
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}
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if (aInputTypeAttr.EqualsIgnoreCase("number")) {
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return java::sdk::InputType::TYPE_CLASS_NUMBER;
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}
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if (aInputTypeAttr.EqualsIgnoreCase("password")) {
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return java::sdk::InputType::TYPE_CLASS_TEXT |
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java::sdk::InputType::TYPE_TEXT_VARIATION_WEB_PASSWORD;
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}
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if (aInputTypeAttr.EqualsIgnoreCase("tel")) {
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return java::sdk::InputType::TYPE_CLASS_PHONE;
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}
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if (aInputTypeAttr.EqualsIgnoreCase("text")) {
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return java::sdk::InputType::TYPE_CLASS_TEXT |
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java::sdk::InputType::TYPE_TEXT_VARIATION_WEB_EDIT_TEXT;
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}
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if (aInputTypeAttr.EqualsIgnoreCase("url")) {
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return java::sdk::InputType::TYPE_CLASS_TEXT |
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java::sdk::InputType::TYPE_TEXT_VARIATION_URI;
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}
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return 0;
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}
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void AccessibleWrap::WrapperDOMNodeID(nsString& aDOMNodeID) {
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if (mContent) {
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nsAtom* id = mContent->GetID();
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if (id) {
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id->ToString(aDOMNodeID);
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}
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}
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}
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bool AccessibleWrap::WrapperRangeInfo(double* aCurVal, double* aMinVal,
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double* aMaxVal, double* aStep) {
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if (HasNumericValue()) {
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*aCurVal = CurValue();
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*aMinVal = MinValue();
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*aMaxVal = MaxValue();
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*aStep = Step();
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return true;
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}
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return false;
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}
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mozilla::java::GeckoBundle::LocalRef AccessibleWrap::ToBundle(bool aSmall) {
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nsAutoString name;
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Name(name);
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nsAutoString textValue;
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Value(textValue);
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nsAutoString nodeID;
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WrapperDOMNodeID(nodeID);
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nsAutoString description;
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Description(description);
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if (aSmall) {
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return ToBundle(State(), Bounds(), ActionCount(), name, textValue, nodeID,
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description);
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}
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double curValue = UnspecifiedNaN<double>();
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double minValue = UnspecifiedNaN<double>();
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double maxValue = UnspecifiedNaN<double>();
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double step = UnspecifiedNaN<double>();
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WrapperRangeInfo(&curValue, &minValue, &maxValue, &step);
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nsCOMPtr<nsIPersistentProperties> attributes = Attributes();
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return ToBundle(State(), Bounds(), ActionCount(), name, textValue, nodeID,
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description, curValue, minValue, maxValue, step, attributes);
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}
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mozilla::java::GeckoBundle::LocalRef AccessibleWrap::ToBundle(
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const uint64_t aState, const nsIntRect& aBounds, const uint8_t aActionCount,
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const nsString& aName, const nsString& aTextValue,
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const nsString& aDOMNodeID, const nsString& aDescription,
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const double& aCurVal, const double& aMinVal, const double& aMaxVal,
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const double& aStep, nsIPersistentProperties* aAttributes) {
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if (!IsProxy() && IsDefunct()) {
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return nullptr;
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}
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GECKOBUNDLE_START(nodeInfo);
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GECKOBUNDLE_PUT(nodeInfo, "id", java::sdk::Integer::ValueOf(VirtualViewID()));
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AccessibleWrap* parent = WrapperParent();
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GECKOBUNDLE_PUT(
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nodeInfo, "parentId",
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java::sdk::Integer::ValueOf(parent ? parent->VirtualViewID() : 0));
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role role = WrapperRole();
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uint32_t flags = GetFlags(role, aState, aActionCount);
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GECKOBUNDLE_PUT(nodeInfo, "flags", java::sdk::Integer::ValueOf(flags));
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GECKOBUNDLE_PUT(nodeInfo, "className",
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java::sdk::Integer::ValueOf(AndroidClass()));
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if (aState & states::EDITABLE) {
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nsAutoString hint(aName);
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if (!aDescription.IsEmpty()) {
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hint.AppendLiteral(" ");
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hint.Append(aDescription);
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}
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GECKOBUNDLE_PUT(nodeInfo, "hint", jni::StringParam(hint));
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GECKOBUNDLE_PUT(nodeInfo, "text", jni::StringParam(aTextValue));
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} else {
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GECKOBUNDLE_PUT(nodeInfo, "text", jni::StringParam(aName));
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if (!aDescription.IsEmpty()) {
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GECKOBUNDLE_PUT(nodeInfo, "hint", jni::StringParam(aDescription));
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}
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}
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nsAutoString geckoRole;
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nsAutoString roleDescription;
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if (VirtualViewID() != kNoID) {
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GetRoleDescription(role, aAttributes, geckoRole, roleDescription);
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}
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GECKOBUNDLE_PUT(nodeInfo, "roleDescription",
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jni::StringParam(roleDescription));
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GECKOBUNDLE_PUT(nodeInfo, "geckoRole", jni::StringParam(geckoRole));
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GECKOBUNDLE_PUT(nodeInfo, "roleDescription",
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jni::StringParam(roleDescription));
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GECKOBUNDLE_PUT(nodeInfo, "geckoRole", jni::StringParam(geckoRole));
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if (!aDOMNodeID.IsEmpty()) {
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GECKOBUNDLE_PUT(nodeInfo, "viewIdResourceName",
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jni::StringParam(aDOMNodeID));
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}
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nsIntRect bounds = Bounds();
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const int32_t data[4] = {bounds.x, bounds.y, bounds.x + bounds.width,
|
|
bounds.y + bounds.height};
|
|
GECKOBUNDLE_PUT(nodeInfo, "bounds", jni::IntArray::New(data, 4));
|
|
|
|
if (HasNumericValue()) {
|
|
GECKOBUNDLE_START(rangeInfo);
|
|
if (aMaxVal == 1 && aMinVal == 0) {
|
|
GECKOBUNDLE_PUT(rangeInfo, "type",
|
|
java::sdk::Integer::ValueOf(2)); // percent
|
|
} else if (std::round(aStep) != aStep) {
|
|
GECKOBUNDLE_PUT(rangeInfo, "type",
|
|
java::sdk::Integer::ValueOf(1)); // float
|
|
} else {
|
|
GECKOBUNDLE_PUT(rangeInfo, "type",
|
|
java::sdk::Integer::ValueOf(0)); // integer
|
|
}
|
|
|
|
if (!IsNaN(aCurVal)) {
|
|
GECKOBUNDLE_PUT(rangeInfo, "current", java::sdk::Double::New(aCurVal));
|
|
}
|
|
if (!IsNaN(aMinVal)) {
|
|
GECKOBUNDLE_PUT(rangeInfo, "min", java::sdk::Double::New(aMinVal));
|
|
}
|
|
if (!IsNaN(aMaxVal)) {
|
|
GECKOBUNDLE_PUT(rangeInfo, "max", java::sdk::Double::New(aMaxVal));
|
|
}
|
|
|
|
GECKOBUNDLE_FINISH(rangeInfo);
|
|
GECKOBUNDLE_PUT(nodeInfo, "rangeInfo", rangeInfo);
|
|
}
|
|
|
|
if (aAttributes) {
|
|
nsString inputTypeAttr;
|
|
nsAccUtils::GetAccAttr(aAttributes, nsGkAtoms::textInputType,
|
|
inputTypeAttr);
|
|
int32_t inputType = GetInputType(inputTypeAttr);
|
|
if (inputType) {
|
|
GECKOBUNDLE_PUT(nodeInfo, "inputType",
|
|
java::sdk::Integer::ValueOf(inputType));
|
|
}
|
|
|
|
nsString posinset;
|
|
nsresult rv = aAttributes->GetStringProperty(NS_LITERAL_CSTRING("posinset"),
|
|
posinset);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
int32_t rowIndex;
|
|
if (sscanf(NS_ConvertUTF16toUTF8(posinset).get(), "%d", &rowIndex) > 0) {
|
|
GECKOBUNDLE_START(collectionItemInfo);
|
|
GECKOBUNDLE_PUT(collectionItemInfo, "rowIndex",
|
|
java::sdk::Integer::ValueOf(rowIndex));
|
|
GECKOBUNDLE_PUT(collectionItemInfo, "columnIndex",
|
|
java::sdk::Integer::ValueOf(0));
|
|
GECKOBUNDLE_PUT(collectionItemInfo, "rowSpan",
|
|
java::sdk::Integer::ValueOf(1));
|
|
GECKOBUNDLE_PUT(collectionItemInfo, "columnSpan",
|
|
java::sdk::Integer::ValueOf(1));
|
|
GECKOBUNDLE_FINISH(collectionItemInfo);
|
|
|
|
GECKOBUNDLE_PUT(nodeInfo, "collectionItemInfo", collectionItemInfo);
|
|
}
|
|
}
|
|
|
|
nsString colSize;
|
|
rv = aAttributes->GetStringProperty(NS_LITERAL_CSTRING("child-item-count"),
|
|
colSize);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
int32_t rowCount;
|
|
if (sscanf(NS_ConvertUTF16toUTF8(colSize).get(), "%d", &rowCount) > 0) {
|
|
GECKOBUNDLE_START(collectionInfo);
|
|
GECKOBUNDLE_PUT(collectionInfo, "rowCount",
|
|
java::sdk::Integer::ValueOf(rowCount));
|
|
GECKOBUNDLE_PUT(collectionInfo, "columnCount",
|
|
java::sdk::Integer::ValueOf(1));
|
|
|
|
nsString unused;
|
|
rv = aAttributes->GetStringProperty(NS_LITERAL_CSTRING("hierarchical"),
|
|
unused);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
GECKOBUNDLE_PUT(collectionInfo, "isHierarchical",
|
|
java::sdk::Boolean::TRUE());
|
|
}
|
|
|
|
if (IsSelect()) {
|
|
int32_t selectionMode = (aState & states::MULTISELECTABLE) ? 2 : 1;
|
|
GECKOBUNDLE_PUT(collectionInfo, "selectionMode",
|
|
java::sdk::Integer::ValueOf(selectionMode));
|
|
}
|
|
|
|
GECKOBUNDLE_FINISH(collectionInfo);
|
|
GECKOBUNDLE_PUT(nodeInfo, "collectionInfo", collectionInfo);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool mustPrune =
|
|
IsProxy() ? nsAccUtils::MustPrune(Proxy()) : nsAccUtils::MustPrune(this);
|
|
if (!mustPrune) {
|
|
auto childCount = ChildCount();
|
|
nsTArray<int32_t> children(childCount);
|
|
for (uint32_t i = 0; i < childCount; i++) {
|
|
auto child = static_cast<AccessibleWrap*>(GetChildAt(i));
|
|
children.AppendElement(child->VirtualViewID());
|
|
}
|
|
|
|
GECKOBUNDLE_PUT(nodeInfo, "children",
|
|
jni::IntArray::New(children.Elements(), children.Length()));
|
|
}
|
|
|
|
GECKOBUNDLE_FINISH(nodeInfo);
|
|
|
|
return nodeInfo;
|
|
}
|
|
|
|
void AccessibleWrap::GetTextEquiv(nsString& aText) {
|
|
if (nsTextEquivUtils::HasNameRule(this, eNameFromSubtreeIfReqRule)) {
|
|
// This is an accessible that normally doesn't get its name from its
|
|
// subtree, so we collect the text equivalent explicitly.
|
|
nsTextEquivUtils::GetTextEquivFromSubtree(this, aText);
|
|
} else {
|
|
Name(aText);
|
|
}
|
|
}
|
|
|
|
bool AccessibleWrap::HandleLiveRegionEvent(AccEvent* aEvent) {
|
|
auto eventType = aEvent->GetEventType();
|
|
if (eventType != nsIAccessibleEvent::EVENT_TEXT_INSERTED &&
|
|
eventType != nsIAccessibleEvent::EVENT_NAME_CHANGE) {
|
|
// XXX: Right now only announce text inserted events. aria-relevant=removals
|
|
// is potentially on the chopping block[1]. We also don't support editable
|
|
// text because we currently can't descern the source of the change[2].
|
|
// 1. https://github.com/w3c/aria/issues/712
|
|
// 2. https://bugzilla.mozilla.org/show_bug.cgi?id=1531189
|
|
return false;
|
|
}
|
|
|
|
if (aEvent->IsFromUserInput()) {
|
|
return false;
|
|
}
|
|
|
|
nsCOMPtr<nsIPersistentProperties> attributes = Attributes();
|
|
nsString live;
|
|
nsresult rv =
|
|
attributes->GetStringProperty(NS_LITERAL_CSTRING("container-live"), live);
|
|
if (!NS_SUCCEEDED(rv)) {
|
|
return false;
|
|
}
|
|
|
|
uint16_t priority = live.EqualsIgnoreCase("assertive")
|
|
? nsIAccessibleAnnouncementEvent::ASSERTIVE
|
|
: nsIAccessibleAnnouncementEvent::POLITE;
|
|
|
|
nsString atomic;
|
|
rv = attributes->GetStringProperty(NS_LITERAL_CSTRING("container-atomic"),
|
|
atomic);
|
|
|
|
Accessible* announcementTarget = this;
|
|
nsAutoString announcement;
|
|
if (atomic.EqualsIgnoreCase("true")) {
|
|
Accessible* atomicAncestor = nullptr;
|
|
for (Accessible* parent = announcementTarget; parent;
|
|
parent = parent->Parent()) {
|
|
Element* element = parent->Elm();
|
|
if (element &&
|
|
element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::aria_atomic,
|
|
nsGkAtoms::_true, eCaseMatters)) {
|
|
atomicAncestor = parent;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (atomicAncestor) {
|
|
announcementTarget = atomicAncestor;
|
|
static_cast<AccessibleWrap*>(atomicAncestor)->GetTextEquiv(announcement);
|
|
}
|
|
} else {
|
|
GetTextEquiv(announcement);
|
|
}
|
|
|
|
announcement.CompressWhitespace();
|
|
if (announcement.IsEmpty()) {
|
|
return false;
|
|
}
|
|
|
|
announcementTarget->Announce(announcement, priority);
|
|
return true;
|
|
}
|