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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_VIEWS_ACCESSIBILITY_VIEW_AX_PLATFORM_NODE_DELEGATE_H_
#define UI_VIEWS_ACCESSIBILITY_VIEW_AX_PLATFORM_NODE_DELEGATE_H_
#include <stdint.h>
#include <vector>
#include "base/strings/string16.h"
#include "build/build_config.h"
#include "ui/accessibility/ax_enums.mojom-forward.h"
#include "ui/accessibility/ax_node_data.h"
#include "ui/accessibility/platform/ax_platform_node_delegate_base.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/views/accessibility/view_accessibility.h"
#include "ui/views/controls/table/table_view.h"
#include "ui/views/widget/widget_observer.h"
namespace ui {
struct AXActionData;
class AXUniqueId;
} // namespace ui
namespace views {
class View;
// Shared base class for platforms that require an implementation of
// |ViewAXPlatformNodeDelegate| to interface with the native accessibility
// toolkit. This class owns the |AXPlatformNode|, which implements those native
// APIs.
class ViewAXPlatformNodeDelegate : public ViewAccessibility,
public ui::AXPlatformNodeDelegateBase {
public:
ViewAXPlatformNodeDelegate(const ViewAXPlatformNodeDelegate&) = delete;
ViewAXPlatformNodeDelegate& operator=(const ViewAXPlatformNodeDelegate&) =
delete;
~ViewAXPlatformNodeDelegate() override;
// ViewAccessibility:
gfx::NativeViewAccessible GetNativeObject() const override;
void NotifyAccessibilityEvent(ax::mojom::Event event_type) override;
#if defined(OS_APPLE)
void AnnounceText(const base::string16& text) override;
#endif
void FireFocusAfterMenuClose() override;
// ui::AXPlatformNodeDelegate
// Note that, for parents of virtual views, GetChildCount() and ChildAtIndex()
// present to assistive technologies the unignored accessibility subtree,
// which doesn't necessarily reflect the internal descendant tree. (An ignored
// node means that the node should not be exposed to the platform.)
const ui::AXNodeData& GetData() const override;
int GetChildCount() const override;
gfx::NativeViewAccessible ChildAtIndex(int index) override;
bool HasModalDialog() const override;
gfx::NativeViewAccessible GetNSWindow() override;
gfx::NativeViewAccessible GetNativeViewAccessible() override;
gfx::NativeViewAccessible GetParent() override;
bool IsChildOfLeaf() const override;
bool IsLeaf() const override;
bool IsToplevelBrowserWindow() override;
gfx::Rect GetBoundsRect(
const ui::AXCoordinateSystem coordinate_system,
const ui::AXClippingBehavior clipping_behavior,
ui::AXOffscreenResult* offscreen_result) const override;
gfx::NativeViewAccessible HitTestSync(
int screen_physical_pixel_x,
int screen_physical_pixel_y) const override;
gfx::NativeViewAccessible GetFocus() override;
ui::AXPlatformNode* GetFromNodeID(int32_t id) override;
ui::AXPlatformNode* GetFromTreeIDAndNodeID(const ui::AXTreeID& ax_tree_id,
int32_t id) override;
bool AccessibilityPerformAction(const ui::AXActionData& data) override;
bool ShouldIgnoreHoveredStateForTesting() override;
bool IsOffscreen() const override;
base::string16 GetAuthorUniqueId() const override;
bool IsMinimized() const override;
// Also in |ViewAccessibility|.
const ui::AXUniqueId& GetUniqueId() const override;
base::Optional<bool> GetTableHasColumnOrRowHeaderNode() const override;
std::vector<int32_t> GetColHeaderNodeIds() const override;
std::vector<int32_t> GetColHeaderNodeIds(int col_index) const override;
// Ordered-set-like and item-like nodes.
bool IsOrderedSetItem() const override;
bool IsOrderedSet() const override;
base::Optional<int> GetPosInSet() const override;
base::Optional<int> GetSetSize() const override;
void SetPopupFocusOverride() override;
void EndPopupFocusOverride() override;
bool IsFocusedForTesting() override;
protected:
explicit ViewAXPlatformNodeDelegate(View* view);
ui::AXPlatformNode* ax_platform_node() { return ax_platform_node_; }
private:
// Uses Views::GetViewsInGroup to find nearby Views in the same group.
// Searches from the View's parent to include siblings within that group.
void GetViewsInGroupForSet(std::vector<View*>* views_in_group) const;
struct ChildWidgetsResult;
ChildWidgetsResult GetChildWidgets() const;
// Gets the real TableView, otherwise nullptr.
TableView* GetAncestorTableView() const;
// We own this, but it is reference-counted on some platforms so we can't use
// a unique_ptr. It is destroyed in the destructor.
ui::AXPlatformNode* ax_platform_node_;
mutable ui::AXNodeData data_;
};
} // namespace views
#endif // UI_VIEWS_ACCESSIBILITY_VIEW_AX_PLATFORM_NODE_DELEGATE_H_
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