Moved remoting::win::MessageWindow to base::win::MessageWindow so that it could be re-used outside …

remoting/host/win/message_window.cc

-// Copyright 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 "remoting/host/win/message_window.h"
-
-#include "base/logging.h"
-#include "base/process_util.h"
-#include "base/strings/stringprintf.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/win/wrapped_window_proc.h"
-
-const char kClassNameFormat[] = "Chromoting_MessageWindow_%p";
-
-namespace remoting {
-namespace win {
-
-MessageWindow::MessageWindow()
-    : atom_(0),
-      instance_(NULL),
-      window_(NULL) {
-  class_name_ = base::StringPrintf(kClassNameFormat, this);
-  instance_ = base::GetModuleFromAddress(static_cast<WNDPROC>(
-      &base::win::WrappedWindowProc<WindowProc>));
-}
-
-MessageWindow::MessageWindow(const std::string& class_name, HINSTANCE instance)
-    : atom_(0),
-      class_name_(class_name),
-      instance_(instance),
-      window_(NULL) {
-}
-
-MessageWindow::~MessageWindow() {
-  DCHECK(CalledOnValidThread());
-
-  if (window_ != NULL) {
-    DestroyWindow(window_);
-    window_ = NULL;
-  }
-
-  if (atom_ != 0) {
-    UnregisterClass(MAKEINTATOM(atom_), instance_);
-    atom_ = 0;
-  }
-}
-
-bool MessageWindow::Create(Delegate* delegate) {
-  DCHECK(CalledOnValidThread());
-  DCHECK(!atom_);
-  DCHECK(!window_);
-
-  // Register a separate window class for each instance of |MessageWindow|.
-  string16 class_name = UTF8ToUTF16(class_name_);
-  WNDCLASSEX window_class;
-  window_class.cbSize = sizeof(window_class);
-  window_class.style = 0;
-  window_class.lpfnWndProc = &base::win::WrappedWindowProc<WindowProc>;
-  window_class.cbClsExtra = 0;
-  window_class.cbWndExtra = 0;
-  window_class.hInstance = instance_;
-  window_class.hIcon = NULL;
-  window_class.hCursor = NULL;
-  window_class.hbrBackground = NULL;
-  window_class.lpszMenuName = NULL;
-  window_class.lpszClassName = class_name.c_str();
-  window_class.hIconSm = NULL;
-  atom_ = RegisterClassEx(&window_class);
-  if (atom_ == 0) {
-    LOG_GETLASTERROR(ERROR)
-        << "Failed to register the window class '" << class_name_ << "'";
-    return false;
-  }
-
-  window_ = CreateWindow(MAKEINTATOM(atom_), 0, 0, 0, 0, 0, 0, HWND_MESSAGE, 0,
-                         instance_, delegate);
-  if (!window_) {
-    LOG_GETLASTERROR(ERROR) << "Failed to create a message-only window";
-    return false;
-  }
-
-  return true;
-}
-
-// static
-LRESULT CALLBACK MessageWindow::WindowProc(HWND hwnd,
-                                           UINT message,
-                                           WPARAM wparam,
-                                           LPARAM lparam) {
-  Delegate* delegate = NULL;
-
-  // Set up the delegate before handling WM_CREATE.
-  if (message == WM_CREATE) {
-    CREATESTRUCT* cs = reinterpret_cast<CREATESTRUCT*>(lparam);
-    delegate = reinterpret_cast<Delegate*>(cs->lpCreateParams);
-
-    // Store pointer to the delegate to the window's user data.
-    SetLastError(ERROR_SUCCESS);
-    LONG_PTR result = SetWindowLongPtr(
-        hwnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(delegate));
-    CHECK(result != 0 || GetLastError() == ERROR_SUCCESS);
-  } else {
-    delegate = reinterpret_cast<Delegate*>(GetWindowLongPtr(hwnd,
-                                                            GWLP_USERDATA));
-  }
-
-  // Handle the message.
-  if (delegate) {
-    LRESULT message_result;
-    if (delegate->HandleMessage(hwnd, message, wparam, lparam, &message_result))
-      return message_result;
-  }
-
-  return DefWindowProc(hwnd, message, wparam, lparam);
-}
-
-}  // namespace win
-}  // namespace remoting