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// 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 <atlbase.h>
#include <atlcom.h>
#include <atlctl.h>
#include <ShObjIdl.h>
#include <WinInet.h>

#include <string>

#include "base/file_path.h"
#include "base/process_util.h"
#include "win8/delegate_execute/resource.h"       // main symbols

using namespace ATL;

EXTERN_C const GUID CLSID_CommandExecuteImpl;

// CommandExecuteImpl
// This class implements the IExecuteCommand and related interfaces for
// handling ShellExecute launches of the Chrome browser, i.e. whether to
// launch Chrome in metro mode or desktop mode.
#if defined(GOOGLE_CHROME_BUILD)
class ATL_NO_VTABLE DECLSPEC_UUID("5C65F4B0-3651-4514-B207-D10CB699B14B")
    CommandExecuteImpl
#else  // GOOGLE_CHROME_BUILD
class ATL_NO_VTABLE DECLSPEC_UUID("A2DF06F9-A21A-44A8-8A99-8B9C84F29160")
    CommandExecuteImpl
#endif  // GOOGLE_CHROME_BUILD
    : public CComObjectRootEx<CComSingleThreadModel>,
      public CComCoClass<CommandExecuteImpl, &CLSID_CommandExecuteImpl>,
      public IExecuteCommand,
      public IObjectWithSiteImpl<CommandExecuteImpl>,
      public IInitializeCommand,
      public IObjectWithSelection,
      public IExecuteCommandApplicationHostEnvironment,
      public IForegroundTransfer {
 public:
  CommandExecuteImpl();

  DECLARE_REGISTRY_RESOURCEID(IDR_COMMANDEXECUTEIMPL)

  BEGIN_COM_MAP(CommandExecuteImpl)
    COM_INTERFACE_ENTRY(IExecuteCommand)
    COM_INTERFACE_ENTRY(IObjectWithSite)
    COM_INTERFACE_ENTRY(IInitializeCommand)
    COM_INTERFACE_ENTRY(IObjectWithSelection)
    COM_INTERFACE_ENTRY(IExecuteCommandApplicationHostEnvironment)
    COM_INTERFACE_ENTRY(IForegroundTransfer)
  END_COM_MAP()

  DECLARE_PROTECT_FINAL_CONSTRUCT()

  HRESULT FinalConstruct() {
    return S_OK;
  }

  void FinalRelease() {
  }

 public:
  // IExecuteCommand
  STDMETHOD(SetKeyState)(DWORD key_state);
  STDMETHOD(SetParameters)(LPCWSTR params);
  STDMETHOD(SetPosition)(POINT pt);
  STDMETHOD(SetShowWindow)(int show);
  STDMETHOD(SetNoShowUI)(BOOL no_show_ui);
  STDMETHOD(SetDirectory)(LPCWSTR directory);
  STDMETHOD(Execute)(void);

  // IInitializeCommand
  STDMETHOD(Initialize)(LPCWSTR name, IPropertyBag* bag);

  // IObjectWithSelection
  STDMETHOD(SetSelection)(IShellItemArray* item_array);
  STDMETHOD(GetSelection)(REFIID riid, void** selection);

  // IExecuteCommandApplicationHostEnvironment
  STDMETHOD(GetValue)(enum AHE_TYPE* pahe);

  // IForegroundTransfer
  STDMETHOD(AllowForegroundTransfer)(void* reserved);

 private:
  static bool FindChromeExe(FilePath* chrome_exe);
  bool GetLaunchScheme(string16* display_name, INTERNET_SCHEME* scheme);
  HRESULT LaunchDesktopChrome();
  // Returns the launch mode, i.e. desktop launch/metro launch, etc.
  EC_HOST_UI_MODE GetLaunchMode();

  CComPtr<IShellItemArray> item_array_;
  string16 parameters_;
  FilePath chrome_exe_;
  STARTUPINFO start_info_;
  string16 verb_;
  string16 display_name_;
  INTERNET_SCHEME launch_scheme_;

  base::IntegrityLevel integrity_level_;
  EC_HOST_UI_MODE chrome_mode_;
};

OBJECT_ENTRY_AUTO(__uuidof(CommandExecuteImpl), CommandExecuteImpl)