Revert 284065 "Revert of Revert of Migrate accessibility from Re..."

trunk/src/content/renderer/render_view_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/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 710 matching lines @@
       frames_in_progress_(0),
       target_url_status_(TARGET_NONE),
       uses_temporary_zoom_level_(false),
 #if defined(OS_ANDROID)
       top_controls_constraints_(cc::BOTH),
 #endif
       has_scrolled_focused_editable_node_into_rect_(false),
       speech_recognition_dispatcher_(NULL),
       browser_plugin_manager_(NULL),
       devtools_agent_(NULL),
+      accessibility_mode_(AccessibilityModeOff),
+      renderer_accessibility_(NULL),
       mouse_lock_dispatcher_(NULL),
 #if defined(OS_ANDROID)
       expected_content_intent_id_(0),
 #endif
 #if defined(OS_WIN)
       focused_plugin_id_(-1),
 #endif
 #if defined(ENABLE_PLUGINS)
       plugin_find_handler_(NULL),
       focused_pepper_plugin_(NULL),
@@ skipping 112 matching lines @@
   // The next group of objects all implement RenderViewObserver, so are deleted
   // along with the RenderView automatically.
   devtools_agent_ = new DevToolsAgent(this);
   if (RenderWidgetCompositor* rwc = compositor()) {
     webview()->devToolsAgent()->setLayerTreeId(rwc->GetLayerTreeId());
   }
   mouse_lock_dispatcher_ = new RenderViewMouseLockDispatcher(this);
 
   history_controller_.reset(new HistoryController(this));
 
+  // Create renderer_accessibility_ if needed.
+  OnSetAccessibilityMode(params->accessibility_mode);
+
   new IdleUserDetector(this);
 
   if (command_line.HasSwitch(switches::kDomAutomationController))
     enabled_bindings_ |= BINDINGS_POLICY_DOM_AUTOMATION;
   if (command_line.HasSwitch(switches::kStatsCollectionController))
     enabled_bindings_ |= BINDINGS_POLICY_STATS_COLLECTION;
 
   ProcessViewLayoutFlags(command_line);
 
   GetContentClient()->renderer()->RenderViewCreated(this);
@@ skipping 322 matching lines @@
     int32 main_frame_routing_id,
     int32 surface_id,
     int64 session_storage_namespace_id,
     const base::string16& frame_name,
     bool is_renderer_created,
     bool swapped_out,
     int32 proxy_routing_id,
     bool hidden,
     bool never_visible,
     int32 next_page_id,
-    const blink::WebScreenInfo& screen_info) {
+    const blink::WebScreenInfo& screen_info,
+    AccessibilityMode accessibility_mode) {
   DCHECK(routing_id != MSG_ROUTING_NONE);
   RenderViewImplParams params(opener_id,
                               window_was_created_with_opener,
                               renderer_prefs,
                               webkit_prefs,
                               routing_id,
                               main_frame_routing_id,
                               surface_id,
                               session_storage_namespace_id,
                               frame_name,
                               is_renderer_created,
                               swapped_out,
                               proxy_routing_id,
                               hidden,
                               never_visible,
                               next_page_id,
-                              screen_info);
+                              screen_info,
+                              accessibility_mode);
   RenderViewImpl* render_view = NULL;
   if (g_create_render_view_impl)
     render_view = g_create_render_view_impl(&params);
   else
     render_view = new RenderViewImpl(&params);
 
   render_view->Initialize(&params);
   return render_view;
 }
 
@@ skipping 167 matching lines @@
     IPC_MESSAGE_HANDLER(ViewMsg_GetAllSavableResourceLinksForCurrentPage,
                         OnGetAllSavableResourceLinksForCurrentPage)
     IPC_MESSAGE_HANDLER(
         ViewMsg_GetSerializedHtmlDataForCurrentPageWithLocalLinks,
         OnGetSerializedHtmlDataForCurrentPageWithLocalLinks)
     IPC_MESSAGE_HANDLER(ViewMsg_ShowContextMenu, OnShowContextMenu)
     // TODO(viettrungluu): Move to a separate message filter.
     IPC_MESSAGE_HANDLER(ViewMsg_SetHistoryLengthAndPrune,
                         OnSetHistoryLengthAndPrune)
     IPC_MESSAGE_HANDLER(ViewMsg_EnableViewSourceMode, OnEnableViewSourceMode)
+    IPC_MESSAGE_HANDLER(ViewMsg_SetAccessibilityMode, OnSetAccessibilityMode)
     IPC_MESSAGE_HANDLER(ViewMsg_DisownOpener, OnDisownOpener)
     IPC_MESSAGE_HANDLER(ViewMsg_ReleaseDisambiguationPopupBitmap,
                         OnReleaseDisambiguationPopupBitmap)
     IPC_MESSAGE_HANDLER(ViewMsg_WindowSnapshotCompleted,
                         OnWindowSnapshotCompleted)
     IPC_MESSAGE_HANDLER(ViewMsg_ForceRedraw, OnForceRedraw)
     IPC_MESSAGE_HANDLER(ViewMsg_SelectWordAroundCaret, OnSelectWordAroundCaret)
 #if defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(InputMsg_ActivateNearestFindResult,
                         OnActivateNearestFindResult)
@@ skipping 321 matching lines @@
       main_frame_routing_id,
       surface_id,
       cloned_session_storage_namespace_id,
       base::string16(),  // WebCore will take care of setting the correct name.
       true,              // is_renderer_created
       false,             // swapped_out
       MSG_ROUTING_NONE,  // proxy_routing_id
       params.disposition == NEW_BACKGROUND_TAB,  // hidden
       never_visible,
       1,  // next_page_id
-      screen_info_);
+      screen_info_,
+      accessibility_mode_);
   view->opened_by_user_gesture_ = params.user_gesture;
 
   // Record whether the creator frame is trying to suppress the opener field.
   view->opener_suppressed_ = params.opener_suppressed;
 
   return view->webview();
 }
 
 WebWidget* RenderViewImpl::createPopupMenu(blink::WebPopupType popup_type) {
   RenderWidget* widget =
@@ skipping 263 matching lines @@
 void RenderViewImpl::focusPrevious() {
   Send(new ViewHostMsg_TakeFocus(routing_id_, true));
 }
 
 void RenderViewImpl::focusedNodeChanged(const WebNode& node) {
   has_scrolled_focused_editable_node_into_rect_ = false;
 
   Send(new ViewHostMsg_FocusedNodeChanged(routing_id_, IsEditableNode(node)));
 
   FOR_EACH_OBSERVER(RenderViewObserver, observers_, FocusedNodeChanged(node));
-
-  // TODO(dmazzoni): this should be part of RenderFrameObserver.
-  main_render_frame()->FocusedNodeChanged(node);
 }
 
 void RenderViewImpl::didUpdateLayout() {
   FOR_EACH_OBSERVER(RenderViewObserver, observers_, DidUpdateLayout());
 
   // We don't always want to set up a timer, only if we've been put in that
   // mode by getting a |ViewMsg_EnablePreferredSizeChangedMode|
   // message.
   if (!send_preferred_size_changes_ || !webview())
     return;
@@ skipping 12 matching lines @@
 int RenderViewImpl::historyBackListCount() {
   return history_list_offset_ < 0 ? 0 : history_list_offset_;
 }
 
 int RenderViewImpl::historyForwardListCount() {
   return history_list_length_ - historyBackListCount() - 1;
 }
 
 void RenderViewImpl::postAccessibilityEvent(
     const WebAXObject& obj, blink::WebAXEvent event) {
-  main_render_frame()->HandleWebAccessibilityEvent(obj, event);
+  if (renderer_accessibility_) {
+    renderer_accessibility_->HandleWebAccessibilityEvent(obj, event);
+  }
 }
 
 void RenderViewImpl::didUpdateInspectorSetting(const WebString& key,
                                            const WebString& value) {
   Send(new ViewHostMsg_UpdateInspectorSetting(routing_id_,
                                               key.utf8(),
                                               value.utf8()));
 }
 
 // blink::WebWidgetClient ----------------------------------------------------
@@ skipping 1342 matching lines @@
     webview()->clearFocusedElement();
 }
 
 void RenderViewImpl::OnSetBackgroundOpaque(bool opaque) {
   if (webview())
     webview()->setIsTransparent(!opaque);
   if (compositor_)
     compositor_->setHasTransparentBackground(!opaque);
 }
 
+void RenderViewImpl::OnSetAccessibilityMode(AccessibilityMode new_mode) {
+  if (accessibility_mode_ == new_mode)
+    return;
+  accessibility_mode_ = new_mode;
+  if (renderer_accessibility_) {
+    delete renderer_accessibility_;
+    renderer_accessibility_ = NULL;
+  }
+  if (accessibility_mode_ == AccessibilityModeOff)
+    return;
+
+  if (accessibility_mode_ & AccessibilityModeFlagFullTree)
+    renderer_accessibility_ = new RendererAccessibilityComplete(this);
+#if !defined(OS_ANDROID)
+  else
+    renderer_accessibility_ = new RendererAccessibilityFocusOnly(this);
+#endif
+}
+
 void RenderViewImpl::OnSetActive(bool active) {
   if (webview())
     webview()->setIsActive(active);
 
 #if defined(ENABLE_PLUGINS) && defined(OS_MACOSX)
   std::set<WebPluginDelegateProxy*>::iterator plugin_it;
   for (plugin_it = plugin_delegates_.begin();
        plugin_it != plugin_delegates_.end(); ++plugin_it) {
     (*plugin_it)->SetWindowFocus(active);
   }
@@ skipping 674 matching lines @@
   if (main_frame && main_frame->opener())
     main_frame->setOpener(NULL);
 }
 
 #if defined(OS_ANDROID)
 bool RenderViewImpl::didTapMultipleTargets(
     const blink::WebGestureEvent& event,
     const WebVector<WebRect>& target_rects) {
   // Never show a disambiguation popup when accessibility is enabled,
   // as this interferes with "touch exploration".
-  AccessibilityMode accessibility_mode =
-      main_render_frame()->accessibility_mode();
-  bool matches_accessibility_mode_complete =
-      (accessibility_mode & AccessibilityModeComplete) ==
-          AccessibilityModeComplete;
-  if (matches_accessibility_mode_complete)
+  bool matchesAccessibilityModeComplete =
+      (accessibility_mode_ & AccessibilityModeComplete) ==
+      AccessibilityModeComplete;
+  if (matchesAccessibilityModeComplete)
     return false;
 
   gfx::Rect finger_rect(
       event.x - event.data.tap.width / 2, event.y - event.data.tap.height / 2,
       event.data.tap.width, event.data.tap.height);
   gfx::Rect zoom_rect;
   float new_total_scale =
       DisambiguationPopupHelper::ComputeZoomAreaAndScaleFactor(
           finger_rect, target_rects, GetSize(),
           gfx::Rect(webview()->mainFrame()->visibleContentRect()).size(),
@@ skipping 144 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content