summaryrefslogtreecommitdiffstats
path: root/accessible/html/HTMLLinkAccessible.cpp
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--accessible/html/HTMLLinkAccessible.cpp129
1 files changed, 129 insertions, 0 deletions
diff --git a/accessible/html/HTMLLinkAccessible.cpp b/accessible/html/HTMLLinkAccessible.cpp
new file mode 100644
index 0000000000..629e4f74cc
--- /dev/null
+++ b/accessible/html/HTMLLinkAccessible.cpp
@@ -0,0 +1,129 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "HTMLLinkAccessible.h"
+
+#include "CacheConstants.h"
+#include "nsCoreUtils.h"
+#include "DocAccessible.h"
+#include "Role.h"
+#include "States.h"
+
+#include "nsContentUtils.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/MutationEventBinding.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLLinkAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+HTMLLinkAccessible::HTMLLinkAccessible(nsIContent* aContent,
+ DocAccessible* aDoc)
+ : HyperTextAccessibleWrap(aContent, aDoc) {
+ mType = eHTMLLinkType;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// nsIAccessible
+
+role HTMLLinkAccessible::NativeRole() const { return roles::LINK; }
+
+uint64_t HTMLLinkAccessible::NativeState() const {
+ return HyperTextAccessibleWrap::NativeState() & ~states::READONLY;
+}
+
+uint64_t HTMLLinkAccessible::NativeLinkState() const {
+ dom::ElementState state = mContent->AsElement()->State();
+ if (state.HasState(dom::ElementState::UNVISITED)) {
+ return states::LINKED;
+ }
+
+ if (state.HasState(dom::ElementState::VISITED)) {
+ return states::LINKED | states::TRAVERSED;
+ }
+
+ // This is a either named anchor (a link with also a name attribute) or
+ // it doesn't have any attributes. Check if 'click' event handler is
+ // registered, otherwise bail out.
+ return nsCoreUtils::HasClickListener(mContent) ? states::LINKED : 0;
+}
+
+uint64_t HTMLLinkAccessible::NativeInteractiveState() const {
+ uint64_t state = HyperTextAccessibleWrap::NativeInteractiveState();
+
+ // This is how we indicate it is a named anchor. In other words, this anchor
+ // can be selected as a location :) There is no other better state to use to
+ // indicate this.
+ if (mContent->AsElement()->HasAttr(kNameSpaceID_None, nsGkAtoms::name)) {
+ state |= states::SELECTABLE;
+ }
+
+ return state;
+}
+
+void HTMLLinkAccessible::Value(nsString& aValue) const {
+ aValue.Truncate();
+
+ HyperTextAccessible::Value(aValue);
+ if (aValue.IsEmpty()) {
+ nsContentUtils::GetLinkLocation(mContent->AsElement(), aValue);
+ }
+}
+
+bool HTMLLinkAccessible::HasPrimaryAction() const {
+ return IsLinked() || HyperTextAccessible::HasPrimaryAction();
+ ;
+}
+
+void HTMLLinkAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) {
+ aName.Truncate();
+
+ if (!IsLinked()) {
+ HyperTextAccessible::ActionNameAt(aIndex, aName);
+ return;
+ }
+
+ // Action 0 (default action): Jump to link
+ if (aIndex == eAction_Jump) aName.AssignLiteral("jump");
+}
+
+bool HTMLLinkAccessible::AttributeChangesState(nsAtom* aAttribute) {
+ return aAttribute == nsGkAtoms::href ||
+ HyperTextAccessibleWrap::AttributeChangesState(aAttribute);
+}
+
+void HTMLLinkAccessible::DOMAttributeChanged(int32_t aNameSpaceID,
+ nsAtom* aAttribute,
+ int32_t aModType,
+ const nsAttrValue* aOldValue,
+ uint64_t aOldState) {
+ HyperTextAccessibleWrap::DOMAttributeChanged(aNameSpaceID, aAttribute,
+ aModType, aOldValue, aOldState);
+
+ if (aAttribute == nsGkAtoms::href &&
+ (aModType == dom::MutationEvent_Binding::ADDITION ||
+ aModType == dom::MutationEvent_Binding::REMOVAL)) {
+ SendCache(CacheDomain::Actions, CacheUpdateType::Update);
+ }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HyperLinkAccessible
+
+bool HTMLLinkAccessible::IsLink() const {
+ // Expose HyperLinkAccessible unconditionally.
+ return true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLLinkAccessible
+
+bool HTMLLinkAccessible::IsLinked() const {
+ dom::ElementState state = mContent->AsElement()->State();
+ return state.HasAtLeastOneOfStates(dom::ElementState::VISITED_OR_UNVISITED);
+}