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// Copyright 2014 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 CHROMECAST_BROWSER_UI_AURA_ACCESSIBILITY_AUTOMATION_MANAGER_AURA_H_
#define CHROMECAST_BROWSER_UI_AURA_ACCESSIBILITY_AUTOMATION_MANAGER_AURA_H_
#include <stdint.h>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/macros.h"
#include "chromecast/browser/ui/aura/accessibility/ax_tree_source_aura.h"
#include "ui/accessibility/ax_action_handler.h"
#include "ui/accessibility/ax_tree_serializer.h"
#include "ui/views/accessibility/ax_aura_obj_cache.h"
#include "ui/views/accessibility/ax_event_observer.h"
#include "ui/views/accessibility/ax_tree_source_views.h"
class AXRootObjWrapper;
namespace base {
template <typename T>
class NoDestructor;
} // namespace base
namespace ui {
class AXEventBundleSink;
}
namespace views {
class AccessibilityAlertWindow;
class AXAuraObjWrapper;
class View;
} // namespace views
using AuraAXTreeSerializer = ui::
AXTreeSerializer<views::AXAuraObjWrapper*, ui::AXNodeData, ui::AXTreeData>;
// Manages a tree of automation nodes.
class AutomationManagerAura : public ui::AXActionHandler,
public views::AXAuraObjCache::Delegate,
public views::AXEventObserver {
public:
// Get the single instance of this class.
static AutomationManagerAura* GetInstance();
// Enable automation support for views.
void Enable();
// Disable automation support for views.
void Disable();
// Handle an event fired upon the root view.
void HandleEvent(ax::mojom::Event event_type);
void HandleAlert(const std::string& text);
// AXActionHandler implementation.
void PerformAction(const ui::AXActionData& data) override;
// views::AXAuraObjCache::Delegate implementation.
void OnChildWindowRemoved(views::AXAuraObjWrapper* parent) override;
void OnEvent(views::AXAuraObjWrapper* aura_obj,
ax::mojom::Event event_type) override;
// views::AXEventObserver:
void OnViewEvent(views::View* view, ax::mojom::Event event_type) override;
void set_event_bundle_sink(ui::AXEventBundleSink* sink) {
event_bundle_sink_ = sink;
}
int32_t GetIDFromWindow(aura::Window* window) { return cache_.GetID(window); }
private:
friend class base::NoDestructor<AutomationManagerAura>;
FRIEND_TEST_ALL_PREFIXES(AutomationManagerAuraBrowserTest, WebAppearsOnce);
AutomationManagerAura();
~AutomationManagerAura() override;
void SendEventOnObjectById(int32_t id, ax::mojom::Event event_type);
// Reset state in this manager. If |reset_serializer| is true, reset the
// serializer to save memory.
void Reset(bool reset_serializer);
void SendEvent(views::AXAuraObjWrapper* aura_obj,
ax::mojom::Event event_type);
// Whether automation support for views is enabled.
bool enabled_;
// Root object representing the entire desktop. Must outlive |current_tree_|.
std::unique_ptr<AXRootObjWrapper> desktop_root_;
// Holds the active views-based accessibility tree. A tree currently consists
// of all views descendant to a |Widget| (see |AXTreeSourceViews|).
// A tree becomes active when an event is fired on a descendant view.
std::unique_ptr<AXTreeSourceAura> current_tree_;
// Serializes incremental updates on the currently active tree
// |current_tree_|.
std::unique_ptr<AuraAXTreeSerializer> current_tree_serializer_;
bool processing_events_;
std::vector<std::pair<views::AXAuraObjWrapper*, ax::mojom::Event>>
pending_events_;
// The handler for AXEvents (e.g. the extensions subsystem in production, or
// a fake for tests).
ui::AXEventBundleSink* event_bundle_sink_ = nullptr;
std::unique_ptr<views::AccessibilityAlertWindow> alert_window_;
views::AXAuraObjCache cache_;
DISALLOW_COPY_AND_ASSIGN(AutomationManagerAura);
};
#endif // CHROMECAST_BROWSER_UI_AURA_ACCESSIBILITY_AUTOMATION_MANAGER_AURA_H_