css 0.0.22

A crate that uses the cssparser and selectors crates to provide a domain model for CSS Stylesheets. Intended to allow effective minification of CSS and CSS transformations such as autoprefixing and removal by other crates
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

// This file is part of css. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT. No part of predicator, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2017 The developers of css. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT.


pub trait CssNumber: Sized
+ Copy + Clone
+ PartialEq<Self> + Eq + PartialOrd + Ord + Hash
+ ToCss
+ Default
+ Add<Self, Output=Self> + AddAssign<Self>
+ Sub<Self, Output=Self> + SubAssign<Self>
+ Mul<Self, Output=Self> + MulAssign<Self>
+ Div<Self, Output=Self> + DivAssign<Self>
+ Rem<Self, Output=Self> + RemAssign<Self>
+ Neg<Output=Self>
+ Debug + Display
+ Deref
+ From<u16> + From<u8>
+ CssNumberNewType<Self> + Unit<Number=Self> + AppUnitsPer
{
	const Zero: Self;
	
	const One: Self;
	
	const Maximum: Self;
	
	const Minimum: Self;
	
	const DotsPerInch: Self;
	
	const CentimetresPerInch: Self;
	
	#[inline(always)]
	fn new(value: f32) -> Result<Self, CssNumberConversionError>
	{
		const NegativeZero: f32 = -0.0_f32;
		const PositiveZero: f32 = 0.0_f32;
		
		use self::CssNumberConversionError::*;
		
		if value.is_finite()
		{
			if value == NegativeZero
			{
				if Self::can_be_negative()
				{
					Ok(Self::_construct(PositiveZero))
				}
				else
				{
					Err(NegativeNumberMayNotBeAllowed)
				}
			}
			else
			{
				Ok(Self::_construct(value))
			}
		}
		else if !Self::can_be_negative() && value.is_sign_negative()
		{
			Err(NegativeNumberMayNotBeAllowed)
		}
		else if value.is_infinite()
		{
			Err(InfinityIsNotAllowed)
		}
		else if value.is_nan()
		{
			Err(NotANumberIsNotAllowed)
		}
		else
		{
			unreachable!("What other kind of f32 is there?");
		}
	}
	
	#[inline(always)]
	fn as_f32(&self) -> f32;
	
	#[inline(always)]
	fn as_u32(&self) -> u32;
	
	#[inline(always)]
	fn round(self) -> Self
	{
		Self::_construct(self.to_f32().round())
	}
	
	#[inline(always)]
	fn abs(self) -> Self
	{
		Self::_construct(self.to_f32().abs())
	}
	
	#[inline(always)]
	fn clamp(value: f32) -> Self
	{
		if value.is_infinite()
		{
			if value.is_sign_positive()
			{
				Self::Maximum
			}
			else
			{
				Self::Minimum
			}
		}
		else if value.is_sign_negative() && !Self::can_be_negative()
		{
			Self::Zero
		}
		else
		{
			Self::_construct(value)
		}
	}
	
	#[inline(always)]
	fn can_be_negative() -> bool
	{
		Self::Minimum.is_negative()
	}
	
	#[doc(hidden)]
	#[inline(always)]
	fn _construct(value: f32) -> Self;
	
	#[inline(always)]
	fn parseNumber<'i>(value: f32, _int_value: Option<i32>) -> Result<Self, ParseError<'i, CustomParseError<'i>>>;
}