win8/test/ui_automation_client.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef WIN8_TEST_UI_AUTOMATION_CLIENT_H_
   6 #define WIN8_TEST_UI_AUTOMATION_CLIENT_H_
   7
   8 // This file contains UI automation implementation details for the
   9 // OpenWithDialogController. See that class for consumable entrypoints.
  10
  11 #include <windows.h>
  12 #include <vector>
  13
  14 #include "base/basictypes.h"
  15 #include "base/callback_forward.h"
  16 #include "base/memory/weak_ptr.h"
  17 #include "base/strings/string16.h"
  18 #include "base/threading/thread.h"
  19 #include "base/threading/thread_checker.h"
  20
  21 namespace win8 {
  22 namespace internal {
  23
  24 // An asynchronous UI automation client that waits for the appearance of a
  25 // Window of a particular class and then invokes one of its children identified
  26 // by name.  An instance may be destroyed at any time after Begin() is invoked.
  27 // Any pending operation is cancelled.
  28 class UIAutomationClient {
  29  public:
  30   // If the HRESULT argument indicates success, the automation client has been
  31   // initialized, has installed its Window observer, and is ready to process
  32   // the named window.  Otherwise, initialization has failed and ResultCallback
  33   // will not be invoked.
  34   typedef base::Callback<void(HRESULT)> InitializedCallback;
  35
  36   // If the HRESULT argument indicates success, the desired item in the window
  37   // was invoked.  Otherwise, the string vector (if not empty) contains the list
  38   // of possible items in the window.
  39   typedef base::Callback<void(HRESULT, std::vector<string16>)> ResultCallback;
  40
  41   UIAutomationClient();
  42   ~UIAutomationClient();
  43
  44   // Starts the client.  Invokes |callback| once the client is ready or upon
  45   // failure to start, in which case |result_callback| will never be called.
  46   // Otherwise, |result_callback| will be invoked once |item_name| has been
  47   // invoked.
  48   void Begin(const wchar_t* class_name,
  49              const string16& item_name,
  50              const InitializedCallback& init_callback,
  51              const ResultCallback& result_callback);
  52
  53  private:
  54   class Context;
  55
  56   base::ThreadChecker thread_checker_;
  57
  58   // A thread in the COM MTA in which automation calls are made.
  59   base::Thread automation_thread_;
  60
  61   // A pointer to the context object that lives on the automation thread.
  62   base::WeakPtr<Context> context_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(UIAutomationClient);
  65 };
  66
  67 }  // namespace internal
  68 }  // namespace win8
  69
  70 #endif  // WIN8_TEST_UI_AUTOMATION_CLIENT_H_