File: window_frame_util.h

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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_UI_FRAME_WINDOW_FRAME_UTIL_H_
#define CHROME_BROWSER_UI_FRAME_WINDOW_FRAME_UTIL_H_

#include "third_party/skia/include/core/SkColor.h"

namespace gfx {
class Size;
}

// Static-only class containing values and helper functions for frame classes
// that need to be accessible outside of /browser/ui/views.
class WindowFrameUtil {
 public:
  static constexpr int kWindowsCaptionButtonWidth = 45;
  static constexpr int kWindowsCaptionButtonHeightRestored = 29;
  static constexpr int kWindowsCaptionButtonVisualSpacing = 1;

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

  // Returns the alpha that the WindowsCaptionButton should use to blend the
  // color provided by the theme in determining the button's 'base color'.
  static SkAlpha CalculateWindowsCaptionButtonBackgroundAlpha(
      SkAlpha theme_alpha);

  // Returns the size of the area occupied by the caption buttons in the glass
  // browser frame view.
  static gfx::Size GetWindowsCaptionButtonAreaSize();

 private:
  WindowFrameUtil() = default;
};

#endif  // CHROME_BROWSER_UI_FRAME_WINDOW_FRAME_UTIL_H_