Global Metrics

Spaces Data

Minimal test - lines (67, 132)

Code

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 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];

  // We initialize sCommandButtonBoxMetrics separately as a performance
  // optimization to avoid fetching dummy values for sCommandButtonMetrics
  // when we don't need those.
  static SIZE sCommandButtonMetrics[3];
  static bool sCommandButtonMetricsInitialized;
  static SIZE sCommandButtonBoxMetrics;
  static bool sCommandButtonBoxMetricsInitialized;

  static const wchar_t* GetClassName(nsUXThemeClass);
  static void EnsureCommandButtonMetrics();
  static void EnsureCommandButtonBoxMetrics();

 public:
  static bool sTitlebarInfoPopulatedAero;
  static bool sTitlebarInfoPopulatedThemed;
  static mozilla::LookAndFeel::WindowsTheme sThemeId;
  static bool sIsDefaultWindowsTheme;
  static bool sIsHighContrastOn;

  static void Invalidate();
  static HANDLE GetTheme(nsUXThemeClass cls);
  static HMODULE GetThemeDLL();

  // nsWindow calls this to update desktop settings info
  static void UpdateTitlebarInfo(HWND aWnd);

  static SIZE GetCommandButtonMetrics(CmdButtonIdx aMetric) {
    EnsureCommandButtonMetrics();
    return sCommandButtonMetrics[aMetric];
  }
  static SIZE GetCommandButtonBoxMetrics() {
    EnsureCommandButtonBoxMetrics();
    return sCommandButtonBoxMetrics;
  }
  static void UpdateNativeThemeInfo();
  static mozilla::LookAndFeel::WindowsTheme GetNativeThemeId();
  static bool IsDefaultWindowTheme();
  static bool IsHighContrastOn();

  static bool AreFlatMenusEnabled();
  static bool IsAppThemed();
};