nsUXThemeData.h - mozsearch

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/* vim: se cin sw=2 ts=2 et : */

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef __UXThemeData_h__

#define __UXThemeData_h__

#include <windows.h>

#include <uxtheme.h>

#include "nscore.h"

#include "mozilla/LookAndFeel.h"

#include "mozilla/Maybe.h"

#include "WinUtils.h"

#include "nsWindowDefs.h"

enum nsUXThemeClass {

  eUXButton = 0,

  eUXEdit,

  eUXToolbar,

  eUXProgress,

  eUXTab,

  eUXTrackbar,

  eUXCombobox,

  eUXHeader,

  eUXListview,

  eUXMenu,

  eUXNumClasses

};

class nsUXThemeData {

  // This class makes sure we don't attempt to open a theme if the previous

  // loading attempt has failed because OpenThemeData is a heavy task and

  // it's less likely that the API returns a different result.

  class ThemeHandle final {

    mozilla::Maybe<HANDLE> mHandle;

   public:

    ThemeHandle() = default;

    ~ThemeHandle();

    // Disallow copy and move

    ThemeHandle(const ThemeHandle&) = delete;

    ThemeHandle(ThemeHandle&&) = delete;

    ThemeHandle& operator=(const ThemeHandle&) = delete;

    ThemeHandle& operator=(ThemeHandle&&) = delete;

    operator HANDLE();

    void OpenOnce(HWND aWindow, LPCWSTR aClassList);

    void Close();

};

  static ThemeHandle sThemes[eUXNumClasses];

  static const wchar_t* GetClassName(nsUXThemeClass);

 public:

  static bool sIsHighContrastOn;

  static void Invalidate();

  static HANDLE GetTheme(nsUXThemeClass cls);

  static HMODULE GetThemeDLL();

  static void UpdateNativeThemeInfo();

  static bool IsHighContrastOn() { return sIsHighContrastOn; }

};

#endif  // __UXThemeData_h__