File: tab_size.h

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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_TEXT_TAB_SIZE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_TEXT_TAB_SIZE_H_

#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"

namespace blink {

enum class TabSizeValueType { kLength, kSpace };

struct TabSize {
  DISALLOW_NEW();
  TabSize(float num_or_length,
          TabSizeValueType is_spaces = TabSizeValueType::kSpace)
      : float_value_(num_or_length),
        is_spaces_(static_cast<unsigned>(is_spaces)) {}

  bool IsSpaces() const { return is_spaces_; }

  float GetPixelSize(float space_width) const {
    return is_spaces_ ? float_value_ * space_width : float_value_;
  }

  float float_value_;
  unsigned is_spaces_ : 1;
};

inline bool operator==(const TabSize& a, const TabSize& b) {
  return (a.float_value_ == b.float_value_) && (a.is_spaces_ == b.is_spaces_);
}

inline bool operator!=(const TabSize& a, const TabSize& b) {
  return !(a == b);
}

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_TEXT_TAB_SIZE_H_