forked from mozilla/gecko-dev
/
ComputedTimingFunction.h
141 lines (128 loc) · 4.47 KB
/
ComputedTimingFunction.h
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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 mozilla_ComputedTimingFunction_h
#define mozilla_ComputedTimingFunction_h
#include "nsSMILKeySpline.h" // nsSMILKeySpline
#include "nsStyleStruct.h" // nsTimingFunction
namespace mozilla {
class ComputedTimingFunction
{
public:
static ComputedTimingFunction
CubicBezier(double x1, double y1, double x2, double y2)
{
return ComputedTimingFunction(x1, y1, x2, y2);
}
static ComputedTimingFunction
Steps(nsTimingFunction::Type aType, uint32_t aSteps)
{
MOZ_ASSERT(aType == nsTimingFunction::Type::StepStart ||
aType == nsTimingFunction::Type::StepEnd,
"The type of timing function should be either step-start or "
"step-end");
MOZ_ASSERT(aSteps > 0, "The number of steps should be 1 or more");
return ComputedTimingFunction(aType, aSteps);
}
static ComputedTimingFunction
Frames(uint32_t aFrames)
{
MOZ_ASSERT(aFrames > 1, "The number of frames should be 2 or more");
return ComputedTimingFunction(nsTimingFunction::Type::Frames, aFrames);
}
ComputedTimingFunction() = default;
explicit ComputedTimingFunction(const nsTimingFunction& aFunction)
{
Init(aFunction);
}
void Init(const nsTimingFunction& aFunction);
// BeforeFlag is used in step timing function.
// https://w3c.github.io/web-animations/#before-flag
enum class BeforeFlag {
Unset,
Set
};
double GetValue(double aPortion, BeforeFlag aBeforeFlag) const;
const nsSMILKeySpline* GetFunction() const
{
NS_ASSERTION(HasSpline(), "Type mismatch");
return &mTimingFunction;
}
nsTimingFunction::Type GetType() const { return mType; }
bool HasSpline() const { return nsTimingFunction::IsSplineType(mType); }
uint32_t GetSteps() const
{
MOZ_ASSERT(mType == nsTimingFunction::Type::StepStart ||
mType == nsTimingFunction::Type::StepEnd);
return mStepsOrFrames;
}
uint32_t GetFrames() const
{
MOZ_ASSERT(mType == nsTimingFunction::Type::Frames);
return mStepsOrFrames;
}
bool operator==(const ComputedTimingFunction& aOther) const
{
return mType == aOther.mType &&
(HasSpline() ?
mTimingFunction == aOther.mTimingFunction :
mStepsOrFrames == aOther.mStepsOrFrames);
}
bool operator!=(const ComputedTimingFunction& aOther) const
{
return !(*this == aOther);
}
bool operator==(const nsTimingFunction& aOther) const
{
return mType == aOther.mType &&
(HasSpline()
? mTimingFunction.X1() == aOther.mFunc.mX1 &&
mTimingFunction.Y1() == aOther.mFunc.mY1 &&
mTimingFunction.X2() == aOther.mFunc.mX2 &&
mTimingFunction.Y2() == aOther.mFunc.mY2
: mStepsOrFrames == aOther.mStepsOrFrames);
}
bool operator!=(const nsTimingFunction& aOther) const
{
return !(*this == aOther);
}
int32_t Compare(const ComputedTimingFunction& aRhs) const;
void AppendToString(nsAString& aResult) const;
static double GetPortion(const Maybe<ComputedTimingFunction>& aFunction,
double aPortion,
BeforeFlag aBeforeFlag)
{
return aFunction ? aFunction->GetValue(aPortion, aBeforeFlag) : aPortion;
}
static int32_t Compare(const Maybe<ComputedTimingFunction>& aLhs,
const Maybe<ComputedTimingFunction>& aRhs);
private:
ComputedTimingFunction(double x1, double y1, double x2, double y2)
: mType(nsTimingFunction::Type::CubicBezier)
, mTimingFunction(x1, y1, x2, y2) { }
ComputedTimingFunction(nsTimingFunction::Type aType, uint32_t aStepsOrFrames)
: mType(aType)
, mStepsOrFrames(aStepsOrFrames) { }
nsTimingFunction::Type mType = nsTimingFunction::Type::Linear;
nsSMILKeySpline mTimingFunction;
uint32_t mStepsOrFrames;
};
inline bool
operator==(const Maybe<ComputedTimingFunction>& aLHS,
const nsTimingFunction& aRHS)
{
if (aLHS.isNothing()) {
return aRHS.mType == nsTimingFunction::Type::Linear;
}
return aLHS.value() == aRHS;
}
inline bool
operator!=(const Maybe<ComputedTimingFunction>& aLHS,
const nsTimingFunction& aRHS)
{
return !(aLHS == aRHS);
}
} // namespace mozilla
#endif // mozilla_ComputedTimingFunction_h