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

chrome/browser/extensions/api/automation_internal/automation_util.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/extensions/api/automation_internal/automation_util.h"
+
+#include <string>
+#include <utility>
+
+#include "base/values.h"
+#include "chrome/browser/accessibility/ax_tree_id_registry.h"
+#include "chrome/common/extensions/api/automation_internal.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/browser_plugin_guest_manager.h"
+#include "content/public/browser/render_frame_host.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/web_contents.h"
+#include "extensions/browser/event_router.h"
+#include "ui/accessibility/ax_enums.h"
+#include "ui/accessibility/ax_node_data.h"
+
+namespace extensions {
+
+namespace {
+
+void PopulateNodeData(const ui::AXNodeData& node_data,
+    linked_ptr< api::automation_internal::AXNodeData>& out_node_data) {
+  out_node_data->id = node_data.id;
+  out_node_data->role = ToString(node_data.role);
+
+  uint32 state_pos = 0, state_shifter = node_data.state;
+  while (state_shifter) {
+    if (state_shifter & 1) {
+      out_node_data->state.additional_properties.SetBoolean(
+          ToString(static_cast<ui::AXState>(state_pos)), true);
+    }
+    state_shifter = state_shifter >> 1;
+    state_pos++;
+  }
+
+  out_node_data->location.left = node_data.location.x();
+  out_node_data->location.top = node_data.location.y();
+  out_node_data->location.width = node_data.location.width();
+  out_node_data->location.height = node_data.location.height();
+
+  if (!node_data.bool_attributes.empty()) {
+    out_node_data->bool_attributes.reset(
+        new api::automation_internal::AXNodeData::BoolAttributes());
+    for (size_t i = 0; i < node_data.bool_attributes.size(); ++i) {
+      std::pair<ui::AXBoolAttribute, bool> attr =
+          node_data.bool_attributes[i];
+      out_node_data->bool_attributes->additional_properties.SetBoolean(
+          ToString(attr.first), attr.second);
+    }
+  }
+
+  if (!node_data.float_attributes.empty()) {
+    out_node_data->float_attributes.reset(
+        new api::automation_internal::AXNodeData::FloatAttributes());
+    for (size_t i = 0; i < node_data.float_attributes.size(); ++i) {
+      std::pair<ui::AXFloatAttribute, float> attr =
+          node_data.float_attributes[i];
+      out_node_data->float_attributes->additional_properties.SetDouble(
+          ToString(attr.first), attr.second);
+    }
+  }
+
+  if (!node_data.html_attributes.empty()) {
+    out_node_data->html_attributes.reset(
+        new api::automation_internal::AXNodeData::HtmlAttributes());
+    for (size_t i = 0; i < node_data.html_attributes.size(); ++i) {
+      std::pair<std::string, std::string> attr = node_data.html_attributes[i];
+      out_node_data->html_attributes->additional_properties.SetString(
+          attr.first, attr.second);
+    }
+  }
+
+  if (!node_data.int_attributes.empty()) {
+    out_node_data->int_attributes.reset(
+        new api::automation_internal::AXNodeData::IntAttributes());
+    for (size_t i = 0; i < node_data.int_attributes.size(); ++i) {
+      std::pair<ui::AXIntAttribute, int> attr = node_data.int_attributes[i];
+      out_node_data->int_attributes->additional_properties.SetInteger(
+          ToString(attr.first), attr.second);
+    }
+  }
+
+  if (!node_data.intlist_attributes.empty()) {
+    out_node_data->intlist_attributes.reset(
+        new api::automation_internal::AXNodeData::IntlistAttributes());
+    for (size_t i = 0; i < node_data.intlist_attributes.size(); ++i) {
+      std::pair<ui::AXIntListAttribute, std::vector<int32> > attr =
+          node_data.intlist_attributes[i];
+      base::ListValue* intlist = new base::ListValue();
+      for (size_t j = 0; j < attr.second.size(); ++j)
+        intlist->AppendInteger(attr.second[j]);
+      out_node_data->intlist_attributes->additional_properties.Set(
+          ToString(attr.first), intlist);
+    }
+  }
+
+  if (!node_data.string_attributes.empty()) {
+    out_node_data->string_attributes.reset(
+        new api::automation_internal::AXNodeData::StringAttributes());
+    for (size_t i = 0; i < node_data.string_attributes.size(); ++i) {
+      std::pair<ui::AXStringAttribute, std::string> attr =
+          node_data.string_attributes[i];
+      out_node_data->string_attributes->additional_properties.SetString(
+          ToString(attr.first), attr.second);
+    }
+  }
+
+  for (size_t i = 0; i < node_data.child_ids.size(); ++i) {
+    out_node_data->child_ids.push_back(node_data.child_ids[i]);
+  }
+}
+
+void DispatchEventInternal(content::BrowserContext* context,
+                           const std::string& event_name,
+                           scoped_ptr<base::ListValue> args) {
+  if (context && EventRouter::Get(context)) {
+    scoped_ptr<Event> event(
+        new Event(events::UNKNOWN, event_name, args.Pass()));
+    event->restrict_to_browser_context = context;
+    EventRouter::Get(context)->BroadcastEvent(event.Pass());
+  }
+}
+
+}  // namespace
+
+namespace automation_util {
+
+void DispatchAccessibilityEventsToAutomation(
+    const std::vector<content::AXEventNotificationDetails>& details,
+    content::BrowserContext* browser_context,
+    const gfx::Vector2d& location_offset) {
+  using api::automation_internal::AXEventParams;
+  using api::automation_internal::AXTreeUpdate;
+
+  std::vector<content::AXEventNotificationDetails>::const_iterator iter =
+      details.begin();
+  for (; iter != details.end(); ++iter) {
+    const content::AXEventNotificationDetails& event = *iter;
+
+    AXEventParams ax_event_params;
+    ax_event_params.tree_id =
+        AXTreeIDRegistry::GetInstance()->GetOrCreateAXTreeID(event.process_id,
+                                                             event.routing_id);
+    ax_event_params.event_type = ToString(iter->event_type);
+    ax_event_params.target_id = event.id;
+
+    AXTreeUpdate& ax_tree_update = ax_event_params.update;
+    ax_tree_update.node_id_to_clear = event.node_id_to_clear;
+    for (size_t i = 0; i < event.nodes.size(); ++i) {
+      ui::AXNodeData src = event.nodes[i];
+      src.location.Offset(location_offset);
+      linked_ptr<api::automation_internal::AXNodeData> out_node(
+          new api::automation_internal::AXNodeData());
+      PopulateNodeData(src, out_node);
+      if (src.HasBoolAttribute(ui::AX_ATTR_IS_AX_TREE_HOST)) {
+        const auto& iter = event.node_to_browser_plugin_instance_id_map.find(
+            src.id);
+        if (iter != event.node_to_browser_plugin_instance_id_map.end()) {
+          int instance_id = iter->second;
+          content::BrowserPluginGuestManager* guest_manager =
+              browser_context->GetGuestManager();
+          content::WebContents* guest_web_contents =
+              guest_manager->GetGuestByInstanceID(event.process_id,
+                                                  instance_id);
+          if (guest_web_contents) {
+            content::RenderFrameHost* guest_rfh =
+                guest_web_contents->GetMainFrame();
+            int guest_tree_id =
+                AXTreeIDRegistry::GetInstance()->GetOrCreateAXTreeID(
+                    guest_rfh->GetProcess()->GetID(),
+                    guest_rfh->GetRoutingID());
+            out_node->int_attributes->additional_properties.SetInteger(
+                ToString(ui::AX_ATTR_CHILD_TREE_ID),
+                guest_tree_id);
+          }
+        }
+      }
+      ax_tree_update.nodes.push_back(out_node);
+    }
+
+    // TODO(dtseng/aboxhall): Why are we sending only one update at a time? We
+    // should match the behavior from renderer -> browser and send a
+    // collection of tree updates over (to the extension); see
+    // |AccessibilityHostMsg_EventParams| and |AccessibilityHostMsg_Events|.
+    DispatchEventInternal(
+        browser_context,
+        api::automation_internal::OnAccessibilityEvent::kEventName,
+        api::automation_internal::OnAccessibilityEvent::Create(
+            ax_event_params));
+  }
+}
+
+void DispatchTreeDestroyedEventToAutomation(
+    int process_id,
+    int routing_id,
+    content::BrowserContext* browser_context) {
+  int tree_id = AXTreeIDRegistry::GetInstance()->GetOrCreateAXTreeID(
+      process_id, routing_id);
+  DispatchEventInternal(
+      browser_context,
+      api::automation_internal::OnAccessibilityTreeDestroyed::kEventName,
+      api::automation_internal::OnAccessibilityTreeDestroyed::Create(tree_id));
+  AXTreeIDRegistry::GetInstance()->RemoveAXTreeID(tree_id);
+}
+
+}  // namespace automation_util
+
+}  // namespace extensions