1 files changed, 104 insertions, 0 deletions
diff --git a/accessible/mac/DocAccessibleWrap.mm b/accessible/mac/DocAccessibleWrap.mm
new file mode 100644
index 0000000000..5270d4f610
--- /dev/null
+++ b/accessible/mac/DocAccessibleWrap.mm
@@ -0,0 +1,104 @@
+/* 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();
+}