Introduce empty IBusDaemonController class.

This class is substitue of IBusController.

BUG=170671
TEST=None


Review URL: https://chromiumcodereview.appspot.com/12041006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@179570 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 163 insertions, 0 deletions

diff --git a/chromeos/ime/ibus_daemon_controller.cc b/chromeos/ime/ibus_daemon_controller.cc
new file mode 100644
index 0000000..925bdf7
--- /dev/null
+++ b/chromeos/ime/ibus_daemon_controller.cc
@@ -0,0 +1,104 @@
+// 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 "chromeos/ime/ibus_daemon_controller.h"
+
+#include "base/chromeos/chromeos_version.h"
+#include "base/logging.h"
+#include "base/threading/thread_checker.h"
+
+namespace chromeos {
+
+namespace {
+
+IBusDaemonController* g_ibus_daemon_controller = NULL;
+
+// The implementation of IBusDaemonController.
+class IBusDaemonControllerImpl : public IBusDaemonController {
+ public:
+  IBusDaemonControllerImpl() {}
+
+  ~IBusDaemonControllerImpl() {}
+
+  // IBusDaemonController override:
+  void Initialize(
+      const scoped_refptr<base::SequencedTaskRunner>& ui_task_runner,
+      const scoped_refptr<base::SequencedTaskRunner>& file_task_runner) {
+    DCHECK(thread_checker_.CalledOnValidThread());
+    // TODO(nona): Implement this.
+  }
+
+  // IBusDaemonController override:
+  void AddObserver(Observer* observer) {
+    DCHECK(thread_checker_.CalledOnValidThread());
+    // TODO(nona): Implement this.
+  }
+
+  // IBusDaemonController override:
+  void RemoveObserver(Observer* observer) {
+    DCHECK(thread_checker_.CalledOnValidThread());
+    // TODO(nona): Implement this.
+  }
+
+  // IBusDaemonController override:
+  bool Start() OVERRIDE {
+    DCHECK(thread_checker_.CalledOnValidThread());
+    // TODO(nona): Implement this.
+    return true;
+  }
+
+  // IBusDaemonController override:
+  bool Stop() OVERRIDE {
+    DCHECK(thread_checker_.CalledOnValidThread());
+    // TODO(nona): Implement this.
+    return true;
+  }
+
+ private:
+  base::ThreadChecker thread_checker_;
+  DISALLOW_COPY_AND_ASSIGN(IBusDaemonControllerImpl);
+};
+
+// The stub implementation of IBusDaemonController.
+class IBusDaemonControllerStubImpl : public IBusDaemonController {
+ public:
+  IBusDaemonControllerStubImpl() {}
+  virtual ~IBusDaemonControllerStubImpl() {}
+
+  // IBusDaemonController overrides:
+  void Initialize(
+      const scoped_refptr<base::SequencedTaskRunner>& ui_runner,
+      const scoped_refptr<base::SequencedTaskRunner>& file_runner) OVERRIDE {}
+  virtual void AddObserver(Observer* observer) OVERRIDE {}
+  virtual void RemoveObserver(Observer* observer) OVERRIDE {}
+  virtual bool Start() OVERRIDE { return true; }
+  virtual bool Stop() OVERRIDE { return true; }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(IBusDaemonControllerStubImpl);
+};
+
+}  // namespace
+
+///////////////////////////////////////////////////////////////////////////////
+// IBusDaemonController
+
+IBusDaemonController::IBusDaemonController() {
+}
+
+IBusDaemonController::~IBusDaemonController() {
+}
+
+IBusDaemonController* IBusDaemonController::GetInstance() {
+  if (!g_ibus_daemon_controller) {
+    if (base::chromeos::IsRunningOnChromeOS()) {
+      g_ibus_daemon_controller = new IBusDaemonControllerImpl();
+    } else {
+      g_ibus_daemon_controller = new IBusDaemonControllerStubImpl();
+    }
+  }
+  return g_ibus_daemon_controller;
+}
+
+}  // namespace chromeos
diff --git a/chromeos/ime/ibus_daemon_controller.h b/chromeos/ime/ibus_daemon_controller.h
new file mode 100644
index 0000000..faa4b52
--- /dev/null
+++ b/chromeos/ime/ibus_daemon_controller.h
@@ -0,0 +1,59 @@
+// 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.
+
+#ifndef CHROMEOS_IME_IBUS_DAEMON_CONTROLLER_H_
+#define CHROMEOS_IME_IBUS_DAEMON_CONTROLLER_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/sequenced_task_runner.h"
+#include "chromeos/chromeos_export.h"
+
+namespace chromeos {
+
+// IBusDaemonController is used to start/stop ibus-daemon process. This class is
+// also watching ibus-daemon process and if it is crashed, re-launch it
+// automatically. This class is managed as Singleton.
+class CHROMEOS_EXPORT IBusDaemonController {
+ public:
+  class Observer {
+   public:
+    // Called when the connection with ibus-daemon is established.
+    virtual void OnConnected() = 0;
+
+    // Called when the connection with ibus-daemon is lost.
+    virtual void OnDisconnected() = 0;
+  };
+
+  virtual ~IBusDaemonController();
+
+  // Initializes IBusDaemonController. ibus-daemon related file handling is
+  // posted to |file_task_runner|.
+  virtual void Initialize(
+      const scoped_refptr<base::SequencedTaskRunner>& ui_task_runner,
+      const scoped_refptr<base::SequencedTaskRunner>& file_task_runner) = 0;
+
+  virtual void AddObserver(Observer* observer) = 0;
+  virtual void RemoveObserver(Observer* observer) = 0;
+
+  // Starts ibus-daemon.
+  virtual bool Start() = 0;
+
+  // Stops ibus-daemon.
+  virtual bool Stop() = 0;
+
+  // Returns actual implementation of IBusDaemonController. If the browser is
+  // not running on the Chrome OS device, this function returns stub
+  // implementation.
+  static CHROMEOS_EXPORT IBusDaemonController* GetInstance();
+
+ protected:
+  // IBusDaemonController is managed as singleton. USe GetInstance instead.
+  IBusDaemonController();
+
+  DISALLOW_COPY_AND_ASSIGN(IBusDaemonController);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_IME_IBUS_DAEMON_CONTROLLER_H_