Migrate accessibility from RenderView to RenderFrame.

content/browser/frame_host/render_frame_host_impl.cc

 // 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.
 
 #include "content/browser/frame_host/render_frame_host_impl.h"
 
 #include "base/bind.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/metrics/user_metrics_action.h"
+#include "content/browser/accessibility/accessibility_mode_helper.h"
+#include "content/browser/accessibility/browser_accessibility_manager.h"
+#include "content/browser/accessibility/browser_accessibility_state_impl.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/frame_host/cross_process_frame_connector.h"
 #include "content/browser/frame_host/cross_site_transferring_request.h"
 #include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/navigator.h"
 #include "content/browser/frame_host/render_frame_host_delegate.h"
 #include "content/browser/renderer_host/input/input_router.h"
 #include "content/browser/renderer_host/input/timeout_monitor.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
+#include "content/browser/renderer_host/render_widget_host_view_base.h"
+#include "content/common/accessibility_messages.h"
 #include "content/common/desktop_notification_messages.h"
 #include "content/common/frame_messages.h"
 #include "content/common/input_messages.h"
 #include "content/common/inter_process_time_ticks_converter.h"
 #include "content/common/swapped_out_messages.h"
+#include "content/public/browser/ax_event_notification_details.h"
+#include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/desktop_notification_delegate.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/common/url_utils.h"
+#include "ui/accessibility/ax_tree.h"
 #include "url/gurl.h"
 
 using base::TimeDelta;
 
 namespace content {
 
 namespace {
 
 // The (process id, routing id) pair that identifies one RenderFrame.
 typedef std::pair<int32, int32> RenderFrameHostID;
@@ skipping 86 matching lines @@
     FrameTreeNode* frame_tree_node,
     int routing_id,
     bool is_swapped_out)
     : render_view_host_(render_view_host),
       delegate_(delegate),
       cross_process_frame_connector_(NULL),
       frame_tree_(frame_tree),
       frame_tree_node_(frame_tree_node),
       routing_id_(routing_id),
       is_swapped_out_(is_swapped_out),
-      weak_ptr_factory_(this) {
+      weak_ptr_factory_(this),
+      accessibility_mode_(AccessibilityModeOff) {
   frame_tree_->RegisterRenderFrameHost(this);
   GetProcess()->AddRoute(routing_id_, this);
   g_routing_id_frame_map.Get().insert(std::make_pair(
       RenderFrameHostID(GetProcess()->GetID(), routing_id_),
       this));
+  SetAccessibilityMode(delegate->GetAccessibilityMode());
 }
 
 RenderFrameHostImpl::~RenderFrameHostImpl() {
   GetProcess()->RemoveRoute(routing_id_);
   g_routing_id_frame_map.Get().erase(
       RenderFrameHostID(GetProcess()->GetID(), routing_id_));
   if (delegate_)
     delegate_->RenderFrameDeleted(this);
 
   // Notify the FrameTree that this RFH is going away, allowing it to shut down
@@ skipping 136 matching lines @@
                                     OnRunBeforeUnloadConfirm)
     IPC_MESSAGE_HANDLER(FrameHostMsg_DidAccessInitialDocument,
                         OnDidAccessInitialDocument)
     IPC_MESSAGE_HANDLER(FrameHostMsg_DidDisownOpener, OnDidDisownOpener)
     IPC_MESSAGE_HANDLER(DesktopNotificationHostMsg_RequestPermission,
                         OnRequestDesktopNotificationPermission)
     IPC_MESSAGE_HANDLER(DesktopNotificationHostMsg_Show,
                         OnShowDesktopNotification)
     IPC_MESSAGE_HANDLER(DesktopNotificationHostMsg_Cancel,
                         OnCancelDesktopNotification)
+    IPC_MESSAGE_HANDLER(AccessibilityHostMsg_Events, OnAccessibilityEvents)
+    IPC_MESSAGE_HANDLER(AccessibilityHostMsg_LocationChanges,
+                        OnAccessibilityLocationChanges)
   IPC_END_MESSAGE_MAP_EX()
 
   if (!msg_is_ok) {
     // The message had a handler, but its de-serialization failed.
     // Kill the renderer.
     RecordAction(base::UserMetricsAction("BadMessageTerminate_RFH"));
     GetProcess()->ReceivedBadMessage();
   }
 
   return handled;
 }
 
+void RenderFrameHostImpl::AccessibilitySetFocus(int object_id) {
+  Send(new AccessibilityMsg_SetFocus(GetRoutingID(), object_id));

[nasko, 2014/05/12 17:28:01]

nit: The pattern in this class is to use routing_id_ instead of calling the
public method.

[dmazzoni, 2014/05/13 06:36:52]

Done.

+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+  if (view)
+    view->OnAccessibilitySetFocus(object_id);
+}
+
+void RenderFrameHostImpl::AccessibilityDoDefaultAction(int object_id) {
+  Send(new AccessibilityMsg_DoDefaultAction(GetRoutingID(), object_id));
+}
+
+void RenderFrameHostImpl::AccessibilityShowMenu(int object_id) {
+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+  if (view)
+    view->AccessibilityShowMenu(object_id);
+}
+
+void RenderFrameHostImpl::AccessibilityScrollToMakeVisible(
+    int acc_obj_id, gfx::Rect subfocus) {
+  Send(new AccessibilityMsg_ScrollToMakeVisible(
+      GetRoutingID(), acc_obj_id, subfocus));
+}
+
+void RenderFrameHostImpl::AccessibilityScrollToPoint(
+    int acc_obj_id, gfx::Point point) {
+  Send(new AccessibilityMsg_ScrollToPoint(
+      GetRoutingID(), acc_obj_id, point));
+}
+
+void RenderFrameHostImpl::AccessibilitySetTextSelection(
+    int object_id, int start_offset, int end_offset) {
+  Send(new AccessibilityMsg_SetTextSelection(
+      GetRoutingID(), object_id, start_offset, end_offset));
+}
+
+bool RenderFrameHostImpl::AccessibilityViewHasFocus() const {
+  RenderWidgetHostView* view = render_view_host_->GetView();
+  if (view)
+    return view->HasFocus();
+  return false;
+}
+
+gfx::Rect RenderFrameHostImpl::AccessibilityGetViewBounds() const {
+  RenderWidgetHostView* view = render_view_host_->GetView();
+  if (view)
+    return view->GetViewBounds();
+  return gfx::Rect();
+}
+
+gfx::Point RenderFrameHostImpl::AccessibilityOriginInScreen(
+    const gfx::Rect& bounds) const {
+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+  if (view)
+    return view->AccessibilityOriginInScreen(bounds);
+  return gfx::Point();
+}
+
+void RenderFrameHostImpl::AccessibilityFatalError() {
+  Send(new AccessibilityMsg_FatalError(GetRoutingID()));
+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+  if (view)
+    view->SetBrowserAccessibilityManager(NULL);
+}
+
 void RenderFrameHostImpl::Init() {
   GetProcess()->ResumeRequestsForView(routing_id_);
 }
 
 void RenderFrameHostImpl::OnAddMessageToConsole(
     int32 level,
     const base::string16& message,
     int32 line_no,
     const base::string16& source_id) {
   if (delegate_->AddMessageToConsole(level, message, line_no, source_id))
@@ skipping 364 matching lines @@
 void RenderFrameHostImpl::OnDidAccessInitialDocument() {
   delegate_->DidAccessInitialDocument();
 }
 
 void RenderFrameHostImpl::OnDidDisownOpener() {
   // This message is only sent for top-level frames. TODO(avi): when frame tree
   // mirroring works correctly, add a check here to enforce it.
   delegate_->DidDisownOpener(this);
 }
 
+void RenderFrameHostImpl::OnAccessibilityEvents(
+    const std::vector<AccessibilityHostMsg_EventParams>& params) {
+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+
+  if ((accessibility_mode() != AccessibilityModeOff) && view &&
+      RenderViewHostImpl::IsRVHStateActive(render_view_host_->rvh_state())) {
+    if (accessibility_mode() & AccessibilityModeFlagPlatform) {
+      view->CreateBrowserAccessibilityManagerIfNeeded(this);
+      BrowserAccessibilityManager* manager =
+          view->GetBrowserAccessibilityManager();
+      if (manager)
+        manager->OnAccessibilityEvents(params);
+    }
+
+    std::vector<AXEventNotificationDetails> details;
+    for (unsigned int i = 0; i < params.size(); ++i) {
+      const AccessibilityHostMsg_EventParams& param = params[i];
+      AXEventNotificationDetails detail(param.update.nodes,
+                                        param.event_type,
+                                        param.id,
+                                        GetProcess()->GetID(),
+                                        GetRoutingID());
+      details.push_back(detail);
+    }
+
+    delegate_->AccessibilityEventReceived(details);
+  }
+
+  // Always send an ACK or the renderer can be in a bad state.
+  Send(new AccessibilityMsg_Events_ACK(GetRoutingID()));
+
+  // The rest of this code is just for testing; bail out if we're not
+  // in that mode.
+  if (accessibility_testing_callback_.is_null())
+    return;
+
+  for (unsigned i = 0; i < params.size(); i++) {
+    const AccessibilityHostMsg_EventParams& param = params[i];
+    if (static_cast<int>(param.event_type) < 0)
+      continue;
+    if (!ax_tree_)
+      ax_tree_.reset(new ui::AXTree(param.update));
+    else
+      CHECK(ax_tree_->Unserialize(param.update)) << ax_tree_->error();
+    accessibility_testing_callback_.Run(param.event_type);
+  }
+}
+
+void RenderFrameHostImpl::OnAccessibilityLocationChanges(
+    const std::vector<AccessibilityHostMsg_LocationChangeParams>& params) {
+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+  if (view &&
+      RenderViewHostImpl::IsRVHStateActive(render_view_host_->rvh_state())) {
+    if (accessibility_mode() & AccessibilityModeFlagPlatform) {
+      view->CreateBrowserAccessibilityManagerIfNeeded(this);
+      BrowserAccessibilityManager* manager =
+          view->GetBrowserAccessibilityManager();
+      if (manager)
+        manager->OnLocationChanges(params);
+    }
+    // TODO(aboxhall): send location change events to web contents observers too
+  }
+}
+
 void RenderFrameHostImpl::SetPendingShutdown(const base::Closure& on_swap_out) {
   render_view_host_->SetPendingShutdown(on_swap_out);
 }
 
 bool RenderFrameHostImpl::CanCommitURL(const GURL& url) {
   // TODO(creis): We should also check for WebUI pages here.  Also, when the
   // out-of-process iframes implementation is ready, we should check for
   // cross-site URLs that are not allowed to commit in this process.
 
   // Give the client a chance to disallow URLs from committing.
   return GetContentClient()->browser()->CanCommitURL(GetProcess(), url);
 }
 
+void RenderFrameHostImpl::DesktopNotificationPermissionRequestDone(
+    int callback_context) {
+  Send(new DesktopNotificationMsg_PermissionRequestDone(
+      routing_id_, callback_context));
+}
+
 void RenderFrameHostImpl::Navigate(const FrameMsg_Navigate_Params& params) {
   TRACE_EVENT0("frame_host", "RenderFrameHostImpl::Navigate");
   // Browser plugin guests are not allowed to navigate outside web-safe schemes,
   // so do not grant them the ability to request additional URLs.
   if (!GetProcess()->IsGuest()) {
     ChildProcessSecurityPolicyImpl::GetInstance()->GrantRequestURL(
         GetProcess()->GetID(), params.url);
     if (params.url.SchemeIs(kDataScheme) &&
         params.base_url_for_data_url.SchemeIs(kFileScheme)) {
       // If 'data:' is used, and we have a 'file:' base url, grant access to
@@ skipping 127 matching lines @@
     render_view_host_->delegate_->RendererUnresponsive(
         render_view_host_,
         render_view_host_->is_waiting_for_beforeunload_ack(),
         render_view_host_->IsWaitingForUnloadACK());
 }
 
 void RenderFrameHostImpl::NotificationClosed(int notification_id) {
   cancel_notification_callbacks_.erase(notification_id);
 }
 
-void RenderFrameHostImpl::DesktopNotificationPermissionRequestDone(
-    int callback_context) {
-  Send(new DesktopNotificationMsg_PermissionRequestDone(
-      routing_id_, callback_context));
+void RenderFrameHostImpl::SetAccessibilityMode(AccessibilityMode mode) {
+  accessibility_mode_ = mode;
+  Send(new FrameMsg_SetAccessibilityMode(GetRoutingID(), mode));
 }
 
+void RenderFrameHostImpl::SetAccessibilityCallbackForTesting(
+    const base::Callback<void(ui::AXEvent)>& callback) {
+  accessibility_testing_callback_ = callback;
+}
+
+const ui::AXTree* RenderFrameHostImpl::GetAXTreeForTesting() {
+  return ax_tree_.get();
+}
+
+#if defined(OS_WIN)
+void RenderFrameHostImpl::SetParentNativeViewAccessible(
+    gfx::NativeViewAccessible accessible_parent) {
+  RenderWidgetHostView* view = render_view_host_->GetView();
+  if (view)
+    view_->SetParentNativeViewAccessible(accessible_parent);
+}
+
+gfx::NativeViewAccessible
+RenderFrameHostImpl::GetParentNativeViewAccessible() const {
+  return delegate_->GetParentNativeViewAccessible();
+}
+#endif
+
 }  // namespace content