File: insets_outsets_f_base.h

package info (click to toggle)
chromium 138.0.7204.183-1
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 6,071,908 kB
  • sloc: cpp: 34,937,088; ansic: 7,176,967; javascript: 4,110,704; python: 1,419,953; asm: 946,768; xml: 739,971; pascal: 187,324; sh: 89,623; perl: 88,663; objc: 79,944; sql: 50,304; cs: 41,786; fortran: 24,137; makefile: 21,806; php: 13,980; tcl: 13,166; yacc: 8,925; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (127 lines) | stat: -rw-r--r-- 4,151 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_GFX_GEOMETRY_INSETS_OUTSETS_F_BASE_H_
#define UI_GFX_GEOMETRY_INSETS_OUTSETS_F_BASE_H_

#include <string>

#include "base/component_export.h"

namespace gfx {

// This is the base template class of InsetsF and OutsetsF.
template <typename T>
class InsetsOutsetsFBase {
 public:
  constexpr InsetsOutsetsFBase() = default;
  constexpr explicit InsetsOutsetsFBase(float all)
      : top_(all), left_(all), bottom_(all), right_(all) {}

  constexpr float top() const { return top_; }
  constexpr float left() const { return left_; }
  constexpr float bottom() const { return bottom_; }
  constexpr float right() const { return right_; }

  // Returns the total width taken up by the insets/outsets, which is the
  // sum of the left and right insets/outsets.
  constexpr float width() const { return left_ + right_; }

  // Returns the total height taken up by the insets/outsets, which is the
  // sum of the top and bottom insets/outsets.
  constexpr float height() const { return top_ + bottom_; }

  // Returns true if the insets/outsets are empty.
  bool IsEmpty() const { return width() == 0.f && height() == 0.f; }

  // These setters can be used together with the default constructor and the
  // single-parameter constructor to construct InsetsF instances, for example:
  //                                                    // T, L, B, R
  //   InsetsF a = InsetsF().set_top(2);                // 2, 0, 0, 0
  //   InsetsF b = InsetsF().set_left(2).set_bottom(3); // 0, 2, 3, 0
  //   InsetsF c = InsetsF(1).set_top(5);               // 5, 1, 1, 1
  constexpr T& set_top(float top) {
    top_ = top;
    return *static_cast<T*>(this);
  }
  constexpr T& set_left(float left) {
    left_ = left;
    return *static_cast<T*>(this);
  }
  constexpr T& set_bottom(float bottom) {
    bottom_ = bottom;
    return *static_cast<T*>(this);
  }
  constexpr T& set_right(float right) {
    right_ = right;
    return *static_cast<T*>(this);
  }

  // In addition to the above, we can also use the following methods to
  // construct InsetsF/OutsetsF.
  // TLBR() is for Chomium UI code. We should not use it in blink code because
  // the order of parameters is different from the normal orders used in blink.
  // Blink code can use the above setters and VH().
  static constexpr inline T TLBR(float top,
                                 float left,
                                 float bottom,
                                 float right) {
    return T().set_top(top).set_left(left).set_bottom(bottom).set_right(right);
  }
  static constexpr inline T VH(float vertical, float horizontal) {
    return TLBR(vertical, horizontal, vertical, horizontal);
  }

  // Sets each side to the maximum of the side and the corresponding side of
  // |other|.
  void SetToMax(const T& other) {
    top_ = std::max(top_, other.top_);
    left_ = std::max(left_, other.left_);
    bottom_ = std::max(bottom_, other.bottom_);
    right_ = std::max(right_, other.right_);
  }

  void Scale(float x_scale, float y_scale) {
    top_ *= y_scale;
    left_ *= x_scale;
    bottom_ *= y_scale;
    right_ *= x_scale;
  }
  void Scale(float scale) { Scale(scale, scale); }

  friend bool operator==(const InsetsOutsetsFBase<T>&,
                         const InsetsOutsetsFBase<T>&) = default;

  void operator+=(const T& other) {
    top_ += other.top_;
    left_ += other.left_;
    bottom_ += other.bottom_;
    right_ += other.right_;
  }

  void operator-=(const T& other) {
    top_ -= other.top_;
    left_ -= other.left_;
    bottom_ -= other.bottom_;
    right_ -= other.right_;
  }

  T operator-() const {
    return T().set_left(-left_).set_right(-right_).set_top(-top_).set_bottom(
        -bottom_);
  }

  // Returns a string representation of the insets/outsets.
  COMPONENT_EXPORT(GEOMETRY) std::string ToString() const;

 private:
  float top_ = 0.f;
  float left_ = 0.f;
  float bottom_ = 0.f;
  float right_ = 0.f;
};

}  // namespace gfx

#endif  // UI_GFX_GEOMETRY_INSETS_OUTSETS_F_BASE_H_