/* -*- 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 "nsCoreUtils.h" #include "DocAccessible.h" #include "Role.h" #include "States.h" #include "nsContentUtils.h" #include "mozilla/EventStates.h" #include "mozilla/dom/Element.h" using namespace mozilla; using namespace mozilla::a11y; //////////////////////////////////////////////////////////////////////////////// // HTMLLinkAccessible //////////////////////////////////////////////////////////////////////////////// HTMLLinkAccessible:: HTMLLinkAccessible(nsIContent* aContent, DocAccessible* aDoc) : HyperTextAccessibleWrap(aContent, aDoc) { } NS_IMPL_ISUPPORTS_INHERITED0(HTMLLinkAccessible, HyperTextAccessible) //////////////////////////////////////////////////////////////////////////////// // nsIAccessible role HTMLLinkAccessible::NativeRole() { return roles::LINK; } uint64_t HTMLLinkAccessible::NativeState() { return HyperTextAccessibleWrap::NativeState() & ~states::READONLY; } uint64_t HTMLLinkAccessible::NativeLinkState() const { EventStates eventState = mContent->AsElement()->State(); if (eventState.HasState(NS_EVENT_STATE_UNVISITED)) return states::LINKED; if (eventState.HasState(NS_EVENT_STATE_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->HasAttr(kNameSpaceID_None, nsGkAtoms::name)) state |= states::SELECTABLE; return state; } void HTMLLinkAccessible::Value(nsString& aValue) { aValue.Truncate(); HyperTextAccessible::Value(aValue); if (aValue.IsEmpty()) nsContentUtils::GetLinkLocation(mContent->AsElement(), aValue); } uint8_t HTMLLinkAccessible::ActionCount() { return IsLinked() ? 1 : HyperTextAccessible::ActionCount(); } 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::DoAction(uint8_t aIndex) { if (!IsLinked()) return HyperTextAccessible::DoAction(aIndex); // Action 0 (default action): Jump to link if (aIndex != eAction_Jump) return false; DoCommand(); return true; } //////////////////////////////////////////////////////////////////////////////// // HyperLinkAccessible bool HTMLLinkAccessible::IsLink() { // Expose HyperLinkAccessible unconditionally. return true; } already_AddRefed<nsIURI> HTMLLinkAccessible::AnchorURIAt(uint32_t aAnchorIndex) { return aAnchorIndex == 0 ? mContent->GetHrefURI() : nullptr; } //////////////////////////////////////////////////////////////////////////////// // Protected members bool HTMLLinkAccessible::IsLinked() const { EventStates state = mContent->AsElement()->State(); return state.HasAtLeastOneOfStates(NS_EVENT_STATE_VISITED | NS_EVENT_STATE_UNVISITED); }