Suppress accessibility events when user is navigating away.

content/browser/web_contents/web_contents_impl.cc

 // 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.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 2511 matching lines @@
     RenderFrameHostImpl* render_frame_host,
     const GURL& validated_url,
     bool is_error_page,
     bool is_iframe_srcdoc) {
   // Notify observers about the start of the provisional load.
   FOR_EACH_OBSERVER(
       WebContentsObserver,
       observers_,
       DidStartProvisionalLoadForFrame(
           render_frame_host, validated_url, is_error_page, is_iframe_srcdoc));
+
+  // Notify accessibility if this is a reload.
+  NavigationEntry* entry = controller_.GetVisibleEntry();
+  if (entry && ui::PageTransitionCoreTypeIs(
+          entry->GetTransitionType(), ui::PAGE_TRANSITION_RELOAD)) {
+    FrameTreeNode* ftn = render_frame_host->frame_tree_node();
+    BrowserAccessibilityManager* manager =
+        ftn->current_frame_host()->browser_accessibility_manager();
+    if (manager)
+      manager->UserIsReloading();
+  }
 }
 
 void WebContentsImpl::DidStartNavigationTransition(
     RenderFrameHostImpl* render_frame_host) {
 #if defined(OS_ANDROID)
   int render_frame_id = render_frame_host->GetRoutingID();
   GetWebContentsAndroid()->DidStartNavigationTransitionForFrame(
       render_frame_id);
 #endif
 }
 
 void WebContentsImpl::DidFailProvisionalLoadWithError(
     RenderFrameHostImpl* render_frame_host,
     const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params) {
   GURL validated_url(params.url);
   FOR_EACH_OBSERVER(WebContentsObserver,
                     observers_,
                     DidFailProvisionalLoad(render_frame_host,
                                            validated_url,
                                            params.error_code,
                                            params.error_description));
+
+  FrameTreeNode* ftn = render_frame_host->frame_tree_node();
+  BrowserAccessibilityManager* manager =
+      ftn->current_frame_host()->browser_accessibility_manager();
+  if (manager)
+    manager->NavigationFailed();
 }
 
 void WebContentsImpl::DidFailLoadWithError(
     RenderFrameHostImpl* render_frame_host,
     const GURL& url,
     int error_code,
     const base::string16& error_description) {
   FOR_EACH_OBSERVER(
       WebContentsObserver,
       observers_,
@@ skipping 55 matching lines @@
 
 void WebContentsImpl::DidCommitProvisionalLoad(
     RenderFrameHostImpl* render_frame_host,
     const GURL& url,
     ui::PageTransition transition_type) {
   // Notify observers about the commit of the provisional load.
   FOR_EACH_OBSERVER(WebContentsObserver,
                     observers_,
                     DidCommitProvisionalLoadForFrame(
                         render_frame_host, url, transition_type));
+
+  BrowserAccessibilityManager* manager =
+      render_frame_host->browser_accessibility_manager();
+  if (manager)
+    manager->NavigationSucceeded();
 }
 
 void WebContentsImpl::DidNavigateMainFramePreCommit(
     bool navigation_is_within_page) {
   // Ensure fullscreen mode is exited before committing the navigation to a
   // different page.  The next page will not start out assuming it is in
   // fullscreen mode.
   if (navigation_is_within_page) {
     // No page change?  Then, the renderer and browser can remain in fullscreen.
     return;
@@ skipping 1155 matching lines @@
 
 void WebContentsImpl::RequestMove(const gfx::Rect& new_bounds) {
   if (delegate_ && delegate_->IsPopupOrPanel(this))
     delegate_->MoveContents(this, new_bounds);
 }
 
 void WebContentsImpl::DidStartLoading(RenderFrameHost* render_frame_host,
                                       bool to_different_document) {
   SetIsLoading(render_frame_host->GetRenderViewHost(), true,
                to_different_document, NULL);
+
+  // Notify accessibility that the user is navigating away from the
+  // current document.
+  //
+  // TODO(dmazzoni): do this using a WebContentsObserver.
+  FrameTreeNode* ftn = static_cast<RenderFrameHostImpl*>(render_frame_host)->
+      frame_tree_node();
+  BrowserAccessibilityManager* manager =
+      ftn->current_frame_host()->browser_accessibility_manager();
+  if (manager)
+    manager->UserIsNavigatingAway();
 }
 
 void WebContentsImpl::DidStopLoading(RenderFrameHost* render_frame_host) {
   scoped_ptr<LoadNotificationDetails> details;
 
   // Use the last committed entry rather than the active one, in case a
   // pending entry has been created.
   NavigationEntry* entry = controller_.GetLastCommittedEntry();
   Navigator* navigator = frame_tree_.root()->navigator();
 
@@ skipping 663 matching lines @@
   node->render_manager()->ResumeResponseDeferredAtStart();
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content