Refactor and send voice interaction structure

chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.cc

Index: chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.cc
diff --git a/chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.cc b/chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.cc
new file mode 100644
index 0000000000000000000000000000000000000000..18562003648e07fb73c469f7e30f582e6d25768d
--- /dev/null
+++ b/chrome/browser/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.cc
@@ -0,0 +1,121 @@
+// Copyright 2017 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/chromeos/arc/voice_interaction/arc_voice_interaction_arc_home_service.h"
+
+#include <utility>
+#include <vector>
+
+#include "ash/shell.h"
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/strings/string16.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "components/arc/arc_bridge_service.h"
+#include "components/arc/instance_holder.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/web_contents.h"
+#include "ui/accessibility/platform/ax_snapshot_node_android_platform.h"
+#include "ui/aura/window.h"
+#include "ui/snapshot/snapshot.h"
+#include "ui/wm/public/activation_client.h"
+
+namespace arc {
+
+namespace {
+
+mojom::VoiceInteractionStructurePtr CreateVoiceInteractionStructure(
+    const ui::AXSnapshotNodeAndroid& view_structure) {
+  auto structure = mojom::VoiceInteractionStructure::New();
+  structure->text = view_structure.text;
+  structure->text_size = view_structure.text_size;
+
+  structure->bold = view_structure.bold;
+  structure->italic = view_structure.italic;
+  structure->underline = view_structure.underline;
+  structure->line_through = view_structure.line_through;
+  structure->color = view_structure.color;
+  structure->bgcolor = view_structure.bgcolor;
+
+  structure->class_name = view_structure.class_name;
+  structure->rect = view_structure.rect;
+
+  if (view_structure.has_selection) {
+    auto selection = mojom::TextSelection::New();
+    selection->start_selection = view_structure.start_selection;
+    selection->end_selection = view_structure.end_selection;
+    structure->selection = std::move(selection);
+  }
+
+  for (auto& child : view_structure.children)
+    structure->children.push_back(CreateVoiceInteractionStructure(*child));
+
+  return structure;
+}
+
+void RequestVoiceInteractionStructureCallback(
+    const base::Callback<void(mojom::VoiceInteractionStructurePtr)>& callback,
+    const ui::AXTreeUpdate& update) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  callback.Run(CreateVoiceInteractionStructure(
+      *ui::AXSnapshotNodeAndroid::Create(update, false)));
+}
+
+}  // namespace
+
+ArcVoiceInteractionArcHomeService::ArcVoiceInteractionArcHomeService(
+    ArcBridgeService* bridge_service)
+    : ArcService(bridge_service), binding_(this) {
+  arc_bridge_service()->voice_interaction_arc_home()->AddObserver(this);
+}
+
+ArcVoiceInteractionArcHomeService::~ArcVoiceInteractionArcHomeService() {
+  arc_bridge_service()->voice_interaction_arc_home()->RemoveObserver(this);
+}
+
+void ArcVoiceInteractionArcHomeService::OnInstanceReady() {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  mojom::VoiceInteractionArcHomeInstance* home_instance =
+      ARC_GET_INSTANCE_FOR_METHOD(
+          arc_bridge_service()->voice_interaction_arc_home(), Init);
+  DCHECK(home_instance);
+  home_instance->Init(binding_.CreateInterfacePtrAndBind());
+}
+
+void ArcVoiceInteractionArcHomeService::GetVoiceInteractionStructure(
+    const GetVoiceInteractionStructureCallback& callback) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  Browser* browser = BrowserList::GetInstance()->GetLastActive();
+  if (!browser || !browser->window()->IsActive()) {
+    // TODO(muyuanli): retrieve context for apps.
+    LOG(ERROR) << "Retrieving context from apps is not implemented.";
+    callback.Run(mojom::VoiceInteractionStructure::New());
+    return;
+  }
+
+  content::WebContents* web_contents =
+      browser->tab_strip_model()->GetActiveWebContents();
+  // Do not process incognito tab.
+  if (web_contents->GetBrowserContext()->IsOffTheRecord()) {
+    callback.Run(mojom::VoiceInteractionStructure::New());
+    return;
+  }
+
+  web_contents->RequestAXTreeSnapshot(
+      base::Bind(&RequestVoiceInteractionStructureCallback, callback));
+}
+
+// static
+mojom::VoiceInteractionStructurePtr
+ArcVoiceInteractionArcHomeService::CreateVoiceInteractionStructureForTesting(
+    const ui::AXSnapshotNodeAndroid& view_structure) {
+  return CreateVoiceInteractionStructure(view_structure);
+}
+
+}  // namespace arc