Refactor RendererAccessibiltiyComplete back into RendererAccessibility.

content/renderer/accessibility/renderer_accessibility_complete.h

-// Copyright (c) 2012 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 CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_
-#define CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_
-
-#include <set>
-#include <vector>
-
-#include "base/containers/hash_tables.h"
-#include "base/memory/weak_ptr.h"
-#include "content/public/renderer/render_view_observer.h"
-#include "content/renderer/accessibility/blink_ax_tree_source.h"
-#include "content/renderer/accessibility/renderer_accessibility.h"
-#include "third_party/WebKit/public/web/WebAXEnums.h"
-#include "third_party/WebKit/public/web/WebAXObject.h"
-#include "ui/accessibility/ax_node_data.h"
-#include "ui/accessibility/ax_tree_serializer.h"
-
-namespace blink {
-class WebDocument;
-class WebNode;
-};
-
-namespace content {
-class RenderViewImpl;
-
-// This is the subclass of RendererAccessibility that implements
-// complete accessibility support for assistive technology.
-//
-// This version 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 RendererAccessibilityComplete
-    : public RendererAccessibility {
- public:
-  explicit RendererAccessibilityComplete(RenderFrameImpl* render_frame);
-  ~RendererAccessibilityComplete() override;
-
-  // RenderFrameObserver implementation.
-  bool OnMessageReceived(const IPC::Message& message) override;
-
-  // RendererAccessibility.
-  void HandleWebAccessibilityEvent(const blink::WebAXObject& obj,
-                                   blink::WebAXEvent event) override;
-  RendererAccessibilityType GetType() override;
-  void FocusedNodeChanged(const blink::WebNode& node) override;
-  void DisableAccessibility() override;
-
-  void HandleAXEvent(const blink::WebAXObject& obj, ui::AXEvent event);
-
- protected:
-  // Send queued events from the renderer to the browser.
-  void SendPendingAccessibilityEvents();
-
-  // Check the entire accessibility tree to see if any nodes have
-  // changed location, by comparing their locations to the cached
-  // versions. If any have moved, send an IPC with the new locations.
-  void SendLocationChanges();
-
- private:
-  // Handlers for messages from the browser to the renderer.
-  void OnDoDefaultAction(int acc_obj_id);
-  void OnEventsAck();
-  void OnChangeScrollPosition(int acc_obj_id, int scroll_x, int scroll_y);
-  void OnScrollToMakeVisible(int acc_obj_id, gfx::Rect subfocus);
-  void OnScrollToPoint(int acc_obj_id, gfx::Point point);
-  void OnSetFocus(int acc_obj_id);
-  void OnSetTextSelection(int acc_obj_id, int start_offset, int end_offset);
-  void OnHitTest(gfx::Point point);
-  void OnReset(int reset_token);
-  void OnFatalError();
-
-  // Events from Blink are collected until they are ready to be
-  // sent to the browser.
-  std::vector<AccessibilityHostMsg_EventParams> pending_events_;
-
-  // The adapter that exposes Blink's accessibility tree to AXTreeSerializer.
-  BlinkAXTreeSource tree_source_;
-
-  // The serializer that sends accessibility messages to the browser process.
-  ui::AXTreeSerializer<blink::WebAXObject> serializer_;
-
-  // Current location of every object, so we can detect when it moves.
-  base::hash_map<int, gfx::Rect> locations_;
-
-  // The most recently observed scroll offset of the root document element.
-  // TODO(dmazzoni): remove once https://bugs.webkit.org/show_bug.cgi?id=73460
-  // is fixed.
-  gfx::Size last_scroll_offset_;
-
-  // Set if we are waiting for an accessibility event ack.
-  bool ack_pending_;
-
-  // Nonzero if the browser requested we reset the accessibility state.
-  // We need to return this token in the next IPC.
-  int reset_token_;
-
-  // So we can queue up tasks to be executed later.
-  base::WeakPtrFactory<RendererAccessibilityComplete> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(RendererAccessibilityComplete);
-};
-
-#endif  // CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_COMPLETE_H_
-
-}  // namespace content