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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /accessible/html/HTMLLinkAccessible.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'accessible/html/HTMLLinkAccessible.cpp')
-rw-r--r--accessible/html/HTMLLinkAccessible.cpp147
1 files changed, 147 insertions, 0 deletions
diff --git a/accessible/html/HTMLLinkAccessible.cpp b/accessible/html/HTMLLinkAccessible.cpp
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+/* -*- 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);
+}