Migrate accessibility from RenderView to RenderFrame.

content/browser/frame_host/render_frame_host_impl.h

 // Copyright 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 CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 
 #include <map>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
+#include "content/browser/accessibility/browser_accessibility_manager.h"
+#include "content/common/accessibility_mode_enums.h"
 #include "content/common/content_export.h"
 #include "content/common/mojo/service_registry_impl.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/common/javascript_message_type.h"
 #include "content/public/common/page_transition_types.h"
 #include "net/http/http_response_headers.h"
 #include "third_party/WebKit/public/web/WebTextDirection.h"
+#include "ui/accessibility/ax_node_data.h"
 
 class GURL;
+struct AccessibilityHostMsg_EventParams;
+struct AccessibilityHostMsg_LocationChangeParams;
 struct FrameHostMsg_DidFailProvisionalLoadWithError_Params;
 struct FrameHostMsg_OpenURL_Params;
 struct FrameHostMsg_BeginNavigation_Params;
 struct FrameMsg_Navigate_Params;
 
 namespace base {
 class FilePath;
 class ListValue;
 }
 
 namespace content {
 
 class CrossProcessFrameConnector;
 class CrossSiteTransferringRequest;
 class FrameTree;
 class FrameTreeNode;
 class RenderFrameHostDelegate;
 class RenderFrameProxyHost;
 class RenderProcessHost;
 class RenderViewHostImpl;
 class RenderWidgetHostImpl;
 struct ContextMenuParams;
 struct GlobalRequestID;
 struct Referrer;
 struct ShowDesktopNotificationHostMsgParams;
 
-class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost {
+class CONTENT_EXPORT RenderFrameHostImpl
+    : public RenderFrameHost,
+      public BrowserAccessibilityDelegate {
  public:
   static RenderFrameHostImpl* FromID(int process_id, int routing_id);
 
   virtual ~RenderFrameHostImpl();
 
   // RenderFrameHost
   virtual int GetRoutingID() OVERRIDE;
   virtual SiteInstance* GetSiteInstance() OVERRIDE;
   virtual RenderProcessHost* GetProcess() OVERRIDE;
   virtual RenderFrameHost* GetParent() OVERRIDE;
   virtual const std::string& GetFrameName() OVERRIDE;
   virtual bool IsCrossProcessSubframe() OVERRIDE;
   virtual GURL GetLastCommittedURL() OVERRIDE;
   virtual gfx::NativeView GetNativeView() OVERRIDE;
   virtual void ExecuteJavaScript(
       const base::string16& javascript) OVERRIDE;
   virtual void ExecuteJavaScript(
       const base::string16& javascript,
       const JavaScriptResultCallback& callback) OVERRIDE;
   virtual RenderViewHost* GetRenderViewHost() OVERRIDE;
   virtual ServiceRegistry* GetServiceRegistry() OVERRIDE;
 
   // IPC::Sender
   virtual bool Send(IPC::Message* msg) OVERRIDE;
 
   // IPC::Listener
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
+  // BrowserAccessibilityDelegate
+  virtual void AccessibilitySetFocus(int acc_obj_id) OVERRIDE;
+  virtual void AccessibilityDoDefaultAction(int acc_obj_id) OVERRIDE;
+  virtual void AccessibilityShowMenu(const gfx::Point& global_point) OVERRIDE;
+  virtual void AccessibilityScrollToMakeVisible(
+      int acc_obj_id, const gfx::Rect& subfocus) OVERRIDE;
+  virtual void AccessibilityScrollToPoint(
+      int acc_obj_id, const gfx::Point& point) OVERRIDE;
+  virtual void AccessibilitySetTextSelection(
+      int acc_obj_id, int start_offset, int end_offset) OVERRIDE;
+  virtual bool AccessibilityViewHasFocus() const OVERRIDE;
+  virtual gfx::Rect AccessibilityGetViewBounds() const OVERRIDE;
+  virtual gfx::Point AccessibilityOriginInScreen(const gfx::Rect& bounds)
+      const OVERRIDE;
+  virtual void AccessibilityHitTest(const gfx::Point& point) OVERRIDE;
+  virtual void AccessibilityFatalError() OVERRIDE;
+
   void Init();
   int routing_id() const { return routing_id_; }
   void OnCreateChildFrame(int new_routing_id,
                           const std::string& frame_name);
 
   RenderViewHostImpl* render_view_host() { return render_view_host_; }
   RenderFrameHostDelegate* delegate() { return delegate_; }
   FrameTreeNode* frame_tree_node() { return frame_tree_node_; }
   // TODO(nasko): The RenderWidgetHost will be owned by RenderFrameHost in
   // the future, so update this accessor to return the right pointer.
@@ skipping 86 matching lines @@
                               bool dialog_was_suppressed);
 
   // Called when an HTML5 notification is closed.
   void NotificationClosed(int notification_id);
 
   // Sets whether there is an outstanding transition request. This is called at
   // the start of a provisional load for the main frame, and cleared when we
   // hear the response or commit.
   void SetHasPendingTransitionRequest(bool has_pending_request);
 
+  // Send a message to the renderer process to change the accessibility mode.
+  void SetAccessibilityMode(AccessibilityMode AccessibilityMode);
+
+  // Turn on accessibility testing. The given callback will be run
+  // every time an accessibility notification is received from the
+  // renderer process, and the accessibility tree it sent can be
+  // retrieved using GetAXTreeForTesting().
+  void SetAccessibilityCallbackForTesting(
+      const base::Callback<void(ui::AXEvent, int)>& callback);
+
+  // Returns a snapshot of the accessibility tree received from the
+  // renderer as of the last time an accessibility notification was
+  // received.
+  const ui::AXTree* GetAXTreeForTesting();
+
+  // Access the BrowserAccessibilityManager if it already exists.
+  BrowserAccessibilityManager* browser_accessibility_manager() const {
+    return browser_accessibility_manager_.get();
+  }
+
+  // If accessibility is enabled, get the BrowserAccessibilityManager for
+  // this frame, or create one if it doesn't exist yet, otherwise return
+  // NULL.
+  BrowserAccessibilityManager* GetOrCreateBrowserAccessibilityManager();
+
+#if defined(OS_WIN)
+  void SetParentNativeViewAccessible(
+      gfx::NativeViewAccessible accessible_parent);
+  gfx::NativeViewAccessible GetParentNativeViewAccessible() const;
+#endif
+
  protected:
   friend class RenderFrameHostFactory;
 
   // TODO(nasko): Remove dependency on RenderViewHost here. RenderProcessHost
   // should be the abstraction needed here, but we need RenderViewHost to pass
   // into WebContentsObserver::FrameDetached for now.
   RenderFrameHostImpl(RenderViewHostImpl* render_view_host,
                       RenderFrameHostDelegate* delegate,
                       FrameTree* frame_tree,
                       FrameTreeNode* frame_tree_node,
@@ skipping 50 matching lines @@
                                           size_t start_offset,
                                           size_t end_offset);
   void OnDidAccessInitialDocument();
   void OnDidDisownOpener();
   void OnUpdateTitle(int32 page_id,
                      const base::string16& title,
                      blink::WebTextDirection title_direction);
   void OnUpdateEncoding(const std::string& encoding);
   void OnBeginNavigation(
       const FrameHostMsg_BeginNavigation_Params& params);
+  void OnAccessibilityEvents(
+      const std::vector<AccessibilityHostMsg_EventParams>& params);
+  void OnAccessibilityLocationChanges(
+      const std::vector<AccessibilityHostMsg_LocationChangeParams>& params);
 
   // Returns whether the given URL is allowed to commit in the current process.
   // This is a more conservative check than RenderProcessHost::FilterURL, since
   // it will be used to kill processes that commit unauthorized URLs.
   bool CanCommitURL(const GURL& url);
 
   void DesktopNotificationPermissionRequestDone(int callback_context);
 
   // For now, RenderFrameHosts indirectly keep RenderViewHosts alive via a
   // refcount that calls Shutdown when it reaches zero.  This allows each
@@ skipping 41 matching lines @@
   int routing_id_;
   bool is_swapped_out_;
 
   // When the last BeforeUnload message was sent.
   base::TimeTicks send_before_unload_start_time_;
 
   ServiceRegistryImpl service_registry_;
 
   base::WeakPtrFactory<RenderFrameHostImpl> weak_ptr_factory_;
 
+  scoped_ptr<BrowserAccessibilityManager> browser_accessibility_manager_;
+
+  // Callback when an event is received, for testing.
+  base::Callback<void(ui::AXEvent, int)> accessibility_testing_callback_;
+  // The most recently received accessibility tree - for testing only.
+  scoped_ptr<ui::AXTree> ax_tree_for_testing_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_