Implement chrome.brailleDisplayPrivate API

chrome/browser/extensions/api/braille_private/braille_private_api.cc

+// Copyright (c) 2013 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/braille_private/braille_private_api.h"
+
+#include "base/lazy_instance.h"
+#include "chrome/browser/extensions/api/braille_private/braille_controller.h"
+#include "chrome/browser/extensions/event_names.h"
+#include "chrome/browser/extensions/event_router.h"
+#include "chrome/browser/extensions/extension_system.h"
+
+namespace WriteText = extensions::api::braille_private::WriteText;
+using extensions::api::braille_private::BrailleController;
+
+namespace extensions {
+BraillePrivateAPI::BraillePrivateAPI(Profile* profile) : profile_(profile) {
+  fprintf(stderr, "Creating BraillePrivateAPI");
+  BrailleController::GetInstance()->AddObserver(this);
+}
+
+BraillePrivateAPI::~BraillePrivateAPI() {
+  BrailleController::GetInstance()->RemoveObserver(this);
+}
+
+void BraillePrivateAPI::Shutdown() {
+  fprintf(stderr, "Destroying braille private api");
+}
+
+static base::LazyInstance<ProfileKeyedAPIFactory<BraillePrivateAPI> >
+g_factory = LAZY_INSTANCE_INITIALIZER;
+
+// static
+ProfileKeyedAPIFactory<BraillePrivateAPI>*
+BraillePrivateAPI::GetFactoryInstance() {
+  return &g_factory.Get();
+}
+
+void BraillePrivateAPI::OnKeyEvent(
+    scoped_ptr<base::DictionaryValue> eventValue) {
+  scoped_ptr<ListValue> args(new ListValue());
+  args->Append(eventValue.release());
+  scoped_ptr<Event> event(new Event(
+      event_names::kBraillePrivateOnKeyEvent, args.Pass()));
+  ExtensionSystem::Get(profile_)->event_router()->BroadcastEvent(event.Pass());
+}
+
+namespace api {
+bool BraillePrivateGetDisplayStateFunction::Prepare() {
+  return true;
+}
+
+void BraillePrivateGetDisplayStateFunction::Work() {
+  SetResult(BrailleController::GetInstance()->GetDisplayState().release());
+}
+
+bool BraillePrivateGetDisplayStateFunction::Respond() {
+  return true;
+}
+
+bool BraillePrivateWriteTextFunction::Prepare() {
+  params_ = WriteText::Params::Create(*args_);
+  EXTENSION_FUNCTION_VALIDATE(params_);
+  return true;
+}
+
+void BraillePrivateWriteTextFunction::Work() {
+  fprintf(stderr, "Braille text %s\n", params_->text.c_str());
+  BrailleController::GetInstance()->WriteText(params_->text, params_->cursor);
+}
+
+bool BraillePrivateWriteTextFunction::Respond() {
+  return true;
+}
+
+bool BraillePrivateWriteDotsFunction::Prepare() {
+  return false;
+}
+
+void BraillePrivateWriteDotsFunction::Work() {
+}
+
+bool BraillePrivateWriteDotsFunction::Respond() {
+  return false;
+}
+}  // namespace api
+}  // extensions