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
#[derive(Debug, Clone, Ord, PartialOrd, Eq, PartialEq, Hash)]
pub enum System
{
Cyclic,
Numeric,
Alphabetic,
Symbolic,
Additive,
Fixed
{
first_symbol_value: Option<i32>
},
Extends(CounterStyleIdent),
}
impl Parse for System
{
fn parse<'i, 't>(_context: &ParserContext, input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, CustomParseError<'i>>>
{
use self::System::*;
let identifier = input.expect_ident_cloned()?;
match_ignore_ascii_case!
{
&*identifier,
"cyclic" => Ok(Cyclic),
"numeric" => Ok(Numeric),
"alphabetic" => Ok(Alphabetic),
"symbolic" => Ok(Symbolic),
"additive" => Ok(Additive),
"fixed" =>
{
let first_symbol_value = input.try(|i| i.expect_integer()).ok();
Ok(Fixed { first_symbol_value })
}
"extends" => Ok(Extends(CounterStyleIdent::parse(input)?)),
_ => Err(ParseError::Custom(CustomParseError::CounterStyleSystemIsNotKnown(identifier.clone()))),
}
}
}
impl ToCss for System
{
fn to_css<W: fmt::Write>(&self, dest: &mut W) -> fmt::Result
{
use self::System::*;
match *self
{
Cyclic => dest.write_str("cyclic"),
Numeric => dest.write_str("numeric"),
Alphabetic => dest.write_str("alphabetic"),
Symbolic => dest.write_str("symbolic"),
Additive => dest.write_str("additive"),
Fixed { first_symbol_value } =>
{
if let Some(value) = first_symbol_value
{
dest.write_str("fixed ")?;
value.to_css(dest)
}
else
{
dest.write_str("fixed")
}
}
Extends(ref other) =>
{
dest.write_str("extends ")?;
other.to_css(dest)
}
}
}
}