Re-land: Reimplement automation API on top of C++-backed AXTree.

chrome/browser/ui/aura/accessibility/automation_manager_aura.cc

 // Copyright 2014 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 "chrome/browser/ui/aura/accessibility/automation_manager_aura.h"
 
 #include <vector>
 
 #include "base/memory/singleton.h"
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/extensions/api/automation_internal/automation_util.h"
+#include "chrome/browser/extensions/api/automation_internal/automation_event_router.h"
 #include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/common/extensions/chrome_extension_messages.h"
 #include "content/public/browser/ax_event_notification_details.h"
 #include "content/public/browser/browser_context.h"
 #include "ui/aura/window.h"
 #include "ui/views/accessibility/ax_aura_obj_cache.h"
 #include "ui/views/accessibility/ax_aura_obj_wrapper.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 using content::BrowserContext;
+using extensions::AutomationEventRouter;
 
 // static
 AutomationManagerAura* AutomationManagerAura::GetInstance() {
   return Singleton<AutomationManagerAura>::get();
 }
 
 void AutomationManagerAura::Enable(BrowserContext* context) {
   enabled_ = true;
   if (!current_tree_.get())
     current_tree_.reset(new AXTreeSourceAura());
@@ skipping 25 matching lines @@
   if (!context && g_browser_process->profile_manager())
     context = g_browser_process->profile_manager()->GetLastUsedProfile();
 
   if (!context) {
     LOG(WARNING) << "Accessibility notification but no browser context";
     return;
   }
 
   views::AXAuraObjWrapper* aura_obj =
       views::AXAuraObjCache::GetInstance()->GetOrCreate(view);
-
-  if (processing_events_) {
-    pending_events_.push_back(std::make_pair(aura_obj, event_type));
-    return;
-  }
-
-  processing_events_ = true;
   SendEvent(context, aura_obj, event_type);
-
-  for (size_t i = 0; i < pending_events_.size(); ++i)
-    SendEvent(context, pending_events_[i].first, pending_events_[i].second);
-
-  processing_events_ = false;
-  pending_events_.clear();
 }
 
 void AutomationManagerAura::HandleAlert(content::BrowserContext* context,
                                         const std::string& text) {
   if (!enabled_)
     return;
 
   views::AXAuraObjWrapper* obj =
       static_cast<AXRootObjWrapper*>(current_tree_->GetRoot())
           ->GetAlertForText(text);
@@ skipping 34 matching lines @@
 }
 
 void AutomationManagerAura::ResetSerializer() {
   current_tree_serializer_.reset(
       new ui::AXTreeSerializer<views::AXAuraObjWrapper*>(current_tree_.get()));
 }
 
 void AutomationManagerAura::SendEvent(BrowserContext* context,
                                       views::AXAuraObjWrapper* aura_obj,
                                       ui::AXEvent event_type) {
-  ui::AXTreeUpdate update;
-  current_tree_serializer_->SerializeChanges(aura_obj, &update);
+  if (processing_events_) {
+    pending_events_.push_back(std::make_pair(aura_obj, event_type));
+    return;
+  }
+  processing_events_ = true;
 
-  // Route this event to special process/routing ids recognized by the
-  // Automation API as the desktop tree.
-  // TODO(dtseng): Would idealy define these special desktop constants in idl.
-  content::AXEventNotificationDetails detail(
-      update.node_id_to_clear, update.nodes, event_type, aura_obj->GetID(),
-      std::map<int32, int>(),
-      0, /* process_id */
-      0 /* routing_id */);
-  std::vector<content::AXEventNotificationDetails> details;
-  details.push_back(detail);
-  extensions::automation_util::DispatchAccessibilityEventsToAutomation(
-      details, context, gfx::Vector2d());
+  ExtensionMsg_AccessibilityEventParams params;
+  current_tree_serializer_->SerializeChanges(aura_obj, &params.update);
+  params.tree_id = 0;
+  params.id = aura_obj->GetID();
+  params.event_type = event_type;
+  AutomationEventRouter* router = AutomationEventRouter::GetInstance();
+  router->DispatchAccessibilityEvent(params);
+
+  processing_events_ = false;
+  auto pending_events_copy = pending_events_;
+  pending_events_.clear();
+  for (size_t i = 0; i < pending_events_copy.size(); ++i) {
+    SendEvent(context,
+              pending_events_copy[i].first,
+              pending_events_copy[i].second);
+  }
 }
 
 void AutomationManagerAura::OnNativeFocusChanged(aura::Window* focused_now) {
   focused_window_ = focused_now;
   if (focused_now && !focused_now->HasObserver(this))
     focused_now->AddObserver(this);
 }
 
 void AutomationManagerAura::OnWindowDestroying(aura::Window* window) {
   if (focused_window_ == window) {
     window->RemoveObserver(this);
     focused_window_ = nullptr;
   }
 }