render_accessibility_impl.h | Explore in Territory

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_RENDERER_ACCESSIBILITY_RENDER_ACCESSIBILITY_IMPL_H_
#define CONTENT_RENDERER_ACCESSIBILITY_RENDER_ACCESSIBILITY_IMPL_H_

#include <list>
#include <memory>
#include <vector>

#include "base/memory/raw_ptr.h"
#include "base/memory/raw_ptr_exclusion.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "build/chromeos_buildflags.h"
#include "content/common/content_export.h"
#include "content/public/renderer/render_accessibility.h"
#include "content/public/renderer/render_frame.h"
#include "content/public/renderer/render_frame_observer.h"
#include "third_party/blink/public/mojom/render_accessibility.mojom.h"
#include "third_party/blink/public/web/web_ax_context.h"
#include "third_party/blink/public/web/web_ax_object.h"
#include "ui/accessibility/ax_event.h"
#include "ui/accessibility/ax_node_data.h"
#include "ui/accessibility/ax_relative_bounds.h"
#include "ui/accessibility/ax_tree.h"
#include "ui/accessibility/ax_tree_data.h"
#include "ui/accessibility/ax_tree_serializer.h"
#include "ui/accessibility/ax_tree_update.h"
#include "ui/gfx/geometry/rect_f.h"

namespace base {
class ElapsedTimer;
}  // namespace base

namespace blink {
class WebDocument;
}  // namespace blink

namespace ui {

struct AXActionData;
class AXActionTarget;
struct AXEvent;
class AXTreeID;

}  // namespace ui

namespace ukm {
class MojoUkmRecorder;
}

namespace content {

class AXAnnotatorsManager;
class RenderFrameImpl;
class RenderAccessibilityManager;

// The browser process implements native accessibility APIs, allowing assistive
// technology (e.g., screen readers, magnifiers) to access and control the web
// contents with high-level APIs. These APIs are also used by automation tools,
// and Windows 8 uses them to determine when the on-screen keyboard should be
// shown.
//
// An instance of this class belongs to the RenderAccessibilityManager object.
// Accessibility is initialized based on the ui::AXMode passed from the browser
// process to the manager object; it lazily starts as Off or EditableTextOnly
// depending on the operating system, and switches to Complete if assistive
// technology is detected or a flag is set.
//
// A tree of accessible objects is built here and sent to the browser process;
// the browser process maintains this as a tree of platform-native accessible
// objects that can be used to respond to accessibility requests from other
// processes.
//
// This class implements complete accessibility support for assistive
// technology. It turns on Blink's accessibility code and sends a serialized
// representation of that tree whenever it changes. It also handles requests
// from the browser to perform accessibility actions on nodes in the tree (e.g.,
// change focus, or click on a button).
class CONTENT_EXPORT RenderAccessibilityImpl : public RenderAccessibility,
                                               public RenderFrameObserver { … };

}  // namespace content

#endif  // CONTENT_RENDERER_ACCESSIBILITY_RENDER_ACCESSIBILITY_IMPL_H_
chromium/content/renderer/accessibility/render_accessibility_impl.h
