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-rw-r--r--accessible/mac/DocAccessibleWrap.mm104
1 files changed, 104 insertions, 0 deletions
diff --git a/accessible/mac/DocAccessibleWrap.mm b/accessible/mac/DocAccessibleWrap.mm
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+/* clang-format off */
+/* -*- Mode: Objective-C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* clang-format on */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "DocAccessibleWrap.h"
+#include "DocAccessible-inl.h"
+#include "nsAccUtils.h"
+
+#import "mozAccessible.h"
+#import "MOXTextMarkerDelegate.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+DocAccessibleWrap::DocAccessibleWrap(dom::Document* aDocument,
+ PresShell* aPresShell)
+ : DocAccessible(aDocument, aPresShell) {}
+
+void DocAccessibleWrap::Shutdown() {
+ [MOXTextMarkerDelegate destroyForDoc:this];
+ DocAccessible::Shutdown();
+}
+
+DocAccessibleWrap::~DocAccessibleWrap() {}
+
+void DocAccessibleWrap::AttributeChanged(dom::Element* aElement,
+ int32_t aNameSpaceID,
+ nsAtom* aAttribute, int32_t aModType,
+ const nsAttrValue* aOldValue) {
+ DocAccessible::AttributeChanged(aElement, aNameSpaceID, aAttribute, aModType,
+ aOldValue);
+ if (aAttribute == nsGkAtoms::aria_live) {
+ LocalAccessible* accessible =
+ mContent != aElement ? GetAccessible(aElement) : this;
+ if (!accessible) {
+ return;
+ }
+
+ static const dom::Element::AttrValuesArray sLiveRegionValues[] = {
+ nsGkAtoms::OFF, nsGkAtoms::polite, nsGkAtoms::assertive, nullptr};
+ int32_t attrValue = nsAccUtils::FindARIAAttrValueIn(
+ aElement, nsGkAtoms::aria_live, sLiveRegionValues, eIgnoreCase);
+ if (attrValue > 0) {
+ if (!aOldValue || aOldValue->IsEmptyString() ||
+ aOldValue->Equals(nsGkAtoms::OFF, eIgnoreCase)) {
+ // This element just got an active aria-live attribute value
+ FireDelayedEvent(nsIAccessibleEvent::EVENT_LIVE_REGION_ADDED,
+ accessible);
+ }
+ } else {
+ if (aOldValue && (aOldValue->Equals(nsGkAtoms::polite, eIgnoreCase) ||
+ aOldValue->Equals(nsGkAtoms::assertive, eIgnoreCase))) {
+ // This element lost an active live region
+ FireDelayedEvent(nsIAccessibleEvent::EVENT_LIVE_REGION_REMOVED,
+ accessible);
+ } else if (attrValue == 0) {
+ // aria-live="off", check if its a role-based live region that
+ // needs to be removed.
+ if (const nsRoleMapEntry* roleMap = accessible->ARIARoleMap()) {
+ // aria role defines it as a live region. It's live!
+ if (roleMap->liveAttRule == ePoliteLiveAttr ||
+ roleMap->liveAttRule == eAssertiveLiveAttr) {
+ FireDelayedEvent(nsIAccessibleEvent::EVENT_LIVE_REGION_REMOVED,
+ accessible);
+ }
+ } else if (nsStaticAtom* value = GetAccService()->MarkupAttribute(
+ aElement, nsGkAtoms::aria_live)) {
+ // HTML element defines it as a live region. It's live!
+ if (value == nsGkAtoms::polite || value == nsGkAtoms::assertive) {
+ FireDelayedEvent(nsIAccessibleEvent::EVENT_LIVE_REGION_REMOVED,
+ accessible);
+ }
+ }
+ }
+ }
+ }
+}
+
+void DocAccessibleWrap::QueueNewLiveRegion(LocalAccessible* aAccessible) {
+ if (!aAccessible) {
+ return;
+ }
+
+ mNewLiveRegions.Insert(aAccessible->UniqueID());
+}
+
+void DocAccessibleWrap::ProcessNewLiveRegions() {
+ for (const auto& uniqueID : mNewLiveRegions) {
+ if (LocalAccessible* liveRegion =
+ GetAccessibleByUniqueID(const_cast<void*>(uniqueID))) {
+ FireDelayedEvent(nsIAccessibleEvent::EVENT_LIVE_REGION_ADDED, liveRegion);
+ }
+ }
+
+ mNewLiveRegions.Clear();
+}
+
+void DocAccessibleWrap::DoInitialUpdate() {
+ DocAccessible::DoInitialUpdate();
+ ProcessNewLiveRegions();
+}