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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/. */
+
+#ifndef mozilla_a11y_BaseAccessibles_h__
+#define mozilla_a11y_BaseAccessibles_h__
+
+#include "AccessibleWrap.h"
+#include "HyperTextAccessible.h"
+
+class nsIContent;
+
+/**
+ * This file contains a number of classes that are used as base
+ * classes for the different accessibility implementations of
+ * the HTML and XUL widget sets. --jgaunt
+ */
+
+namespace mozilla {
+namespace a11y {
+
+/**
+ * Leaf version of DOM Accessible -- has no children
+ */
+class LeafAccessible : public AccessibleWrap {
+ public:
+ LeafAccessible(nsIContent* aContent, DocAccessible* aDoc);
+
+ // nsISupports
+ NS_INLINE_DECL_REFCOUNTING_INHERITED(LeafAccessible, AccessibleWrap)
+
+ // LocalAccessible
+ virtual LocalAccessible* LocalChildAtPoint(
+ int32_t aX, int32_t aY, EWhichChildAtPoint aWhichChild) override;
+ bool InsertChildAt(uint32_t aIndex, LocalAccessible* aChild) final;
+ bool RemoveChild(LocalAccessible* aChild) final;
+
+ virtual bool IsAcceptableChild(nsIContent* aEl) const override;
+
+ protected:
+ virtual ~LeafAccessible() {}
+};
+
+/**
+ * Used for text or image accessible nodes contained by link accessibles or
+ * accessibles for nodes with registered click event handler. It knows how to
+ * report the state of the host link (traveled or not) and can focus the host
+ * accessible programmatically.
+ */
+class LinkableAccessible : public AccessibleWrap {
+ public:
+ LinkableAccessible(nsIContent* aContent, DocAccessible* aDoc)
+ : AccessibleWrap(aContent, aDoc) {}
+
+ NS_INLINE_DECL_REFCOUNTING_INHERITED(LinkableAccessible, AccessibleWrap)
+
+ // LocalAccessible
+ virtual void Value(nsString& aValue) const override;
+ virtual uint64_t NativeLinkState() const override;
+ virtual void TakeFocus() const override;
+
+ // ActionAccessible
+ virtual KeyBinding AccessKey() const override;
+
+ // ActionAccessible helpers
+ const LocalAccessible* ActionWalk(bool* aIsLink = nullptr,
+ bool* aIsOnclick = nullptr) const;
+
+ protected:
+ virtual ~LinkableAccessible() {}
+};
+
+/**
+ * A simple accessible that gets its enumerated role.
+ */
+template <a11y::role R>
+class EnumRoleAccessible : public AccessibleWrap {
+ public:
+ EnumRoleAccessible(nsIContent* aContent, DocAccessible* aDoc)
+ : AccessibleWrap(aContent, aDoc) {}
+
+ NS_IMETHOD QueryInterface(REFNSIID aIID, void** aPtr) override {
+ return LocalAccessible::QueryInterface(aIID, aPtr);
+ }
+
+ // LocalAccessible
+ virtual a11y::role NativeRole() const override { return R; }
+
+ protected:
+ virtual ~EnumRoleAccessible() {}
+};
+
+/**
+ * Like EnumRoleAccessible, but with text support.
+ */
+template <a11y::role R>
+class EnumRoleHyperTextAccessible : public HyperTextAccessible {
+ public:
+ EnumRoleHyperTextAccessible(nsIContent* aContent, DocAccessible* aDoc)
+ : HyperTextAccessible(aContent, aDoc) {}
+
+ // LocalAccessible
+ virtual a11y::role NativeRole() const override { return R; }
+
+ protected:
+ virtual ~EnumRoleHyperTextAccessible() {}
+};
+
+/**
+ * A wrapper accessible around native accessible to connect it with
+ * crossplatform accessible tree.
+ */
+class DummyAccessible : public AccessibleWrap {
+ public:
+ explicit DummyAccessible(DocAccessible* aDocument = nullptr)
+ : AccessibleWrap(nullptr, aDocument) {
+ // IsDefunct() asserts if mContent is null, which is always true for
+ // DummyAccessible. We can prevent this by setting eSharedNode.
+ mStateFlags |= eSharedNode;
+ }
+
+ uint64_t NativeState() const final;
+ uint64_t NativeInteractiveState() const final;
+ uint64_t NativeLinkState() const final;
+ bool NativelyUnavailable() const final;
+ void ApplyARIAState(uint64_t* aState) const final;
+
+ protected:
+ virtual ~DummyAccessible() {}
+};
+
+} // namespace a11y
+} // namespace mozilla
+
+#endif