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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
//! Conditional processing attributes: `requiredExtensions`, `requiredFeatures`, `systemLanguage`.
#[allow(unused_imports, deprecated)]
use std::ascii::AsciiExt;
use std::str::FromStr;
use language_tags::LanguageTag;
use crate::accept_language::{LanguageTags, UserLanguage};
use crate::error::*;
// No extensions at the moment.
static IMPLEMENTED_EXTENSIONS: &[&str] = &[];
#[derive(Debug, PartialEq)]
pub struct RequiredExtensions(pub bool);
impl RequiredExtensions {
/// Parse a requiredExtensions attribute.
///
/// <http://www.w3.org/TR/SVG/struct.html#RequiredExtensionsAttribute>
pub fn from_attribute(s: &str) -> Result<RequiredExtensions, ValueErrorKind> {
Ok(RequiredExtensions(
s.split_whitespace()
.all(|f| IMPLEMENTED_EXTENSIONS.binary_search(&f).is_ok()),
))
}
/// Evaluate a requiredExtensions value for conditional processing.
pub fn eval(&self) -> bool {
self.0
}
}
// Keep these sorted alphabetically for binary_search.
static IMPLEMENTED_FEATURES: &[&str] = &[
"http://www.w3.org/TR/SVG11/feature#BasicFilter",
"http://www.w3.org/TR/SVG11/feature#BasicGraphicsAttribute",
"http://www.w3.org/TR/SVG11/feature#BasicPaintAttribute",
"http://www.w3.org/TR/SVG11/feature#BasicStructure",
"http://www.w3.org/TR/SVG11/feature#BasicText",
"http://www.w3.org/TR/SVG11/feature#ConditionalProcessing",
"http://www.w3.org/TR/SVG11/feature#ContainerAttribute",
"http://www.w3.org/TR/SVG11/feature#Filter",
"http://www.w3.org/TR/SVG11/feature#Gradient",
"http://www.w3.org/TR/SVG11/feature#Image",
"http://www.w3.org/TR/SVG11/feature#Marker",
"http://www.w3.org/TR/SVG11/feature#Mask",
"http://www.w3.org/TR/SVG11/feature#OpacityAttribute",
"http://www.w3.org/TR/SVG11/feature#Pattern",
"http://www.w3.org/TR/SVG11/feature#SVG",
"http://www.w3.org/TR/SVG11/feature#SVG-static",
"http://www.w3.org/TR/SVG11/feature#Shape",
"http://www.w3.org/TR/SVG11/feature#Structure",
"http://www.w3.org/TR/SVG11/feature#Style",
"http://www.w3.org/TR/SVG11/feature#View",
"org.w3c.svg.static", // deprecated SVG 1.0 feature string
];
#[derive(Debug, PartialEq)]
pub struct RequiredFeatures(pub bool);
impl RequiredFeatures {
// Parse a requiredFeatures attribute
// http://www.w3.org/TR/SVG/struct.html#RequiredFeaturesAttribute
pub fn from_attribute(s: &str) -> Result<RequiredFeatures, ValueErrorKind> {
Ok(RequiredFeatures(
s.split_whitespace()
.all(|f| IMPLEMENTED_FEATURES.binary_search(&f).is_ok()),
))
}
/// Evaluate a requiredFeatures value for conditional processing.
pub fn eval(&self) -> bool {
self.0
}
}
#[derive(Debug, PartialEq)]
pub struct SystemLanguage(LanguageTags);
impl SystemLanguage {
/// Parse a `systemLanguage` attribute and match it against a given `Locale`
///
/// The [`systemLanguage`] conditional attribute is a
/// comma-separated list of [BCP47] Language Tags. This function
/// parses the attribute and matches the result against a given
/// `locale`. If there is a match, i.e. if the given locale
/// supports one of the languages listed in the `systemLanguage`
/// attribute, then the `SystemLanguage.0` will be `true`;
/// otherwise it will be `false`.
///
/// Normally, calling code will pass `&Locale::current()` for the
/// `locale` attribute; this is the user's current locale.
///
/// [`systemLanguage`]: https://www.w3.org/TR/SVG/struct.html#ConditionalProcessingSystemLanguageAttribute
/// [BCP47]: http://www.ietf.org/rfc/bcp/bcp47.txt
pub fn from_attribute(s: &str) -> Result<SystemLanguage, ValueErrorKind> {
let attribute_tags = s
.split(',')
.map(str::trim)
.map(|s| {
LanguageTag::from_str(s).map_err(|e| {
ValueErrorKind::parse_error(&format!("invalid language tag: \"{}\"", e))
})
})
.collect::<Result<Vec<LanguageTag>, _>>()?;
Ok(SystemLanguage(LanguageTags::from(attribute_tags)))
}
/// Evaluate a systemLanguage value for conditional processing.
pub fn eval(&self, user_language: &UserLanguage) -> bool {
user_language.any_matches(&self.0)
}
}
#[cfg(test)]
mod tests {
use super::*;
use locale_config::Locale;
#[test]
fn required_extensions() {
assert_eq!(
RequiredExtensions::from_attribute("http://test.org/NotExisting/1.0").unwrap(),
RequiredExtensions(false)
);
}
#[test]
fn required_features() {
assert_eq!(
RequiredFeatures::from_attribute("http://www.w3.org/TR/SVG11/feature#NotExisting")
.unwrap(),
RequiredFeatures(false)
);
assert_eq!(
RequiredFeatures::from_attribute("http://www.w3.org/TR/SVG11/feature#BasicFilter")
.unwrap(),
RequiredFeatures(true)
);
assert_eq!(
RequiredFeatures::from_attribute(
"http://www.w3.org/TR/SVG11/feature#BasicFilter \
http://www.w3.org/TR/SVG11/feature#NotExisting",
)
.unwrap(),
RequiredFeatures(false)
);
assert_eq!(
RequiredFeatures::from_attribute(
"http://www.w3.org/TR/SVG11/feature#BasicFilter \
http://www.w3.org/TR/SVG11/feature#BasicText",
)
.unwrap(),
RequiredFeatures(true)
);
}
#[test]
fn system_language() {
let locale = Locale::new("de,en-US").unwrap();
let user_language = UserLanguage::LanguageTags(LanguageTags::from_locale(&locale).unwrap());
assert!(SystemLanguage::from_attribute("").is_err());
assert!(SystemLanguage::from_attribute("12345").is_err());
assert_eq!(
SystemLanguage::from_attribute("fr")
.unwrap()
.eval(&user_language),
false
);
assert_eq!(
SystemLanguage::from_attribute("en")
.unwrap()
.eval(&user_language),
false
);
assert_eq!(
SystemLanguage::from_attribute("de")
.unwrap()
.eval(&user_language),
true
);
assert_eq!(
SystemLanguage::from_attribute("en-US")
.unwrap()
.eval(&user_language),
true
);
assert_eq!(
SystemLanguage::from_attribute("en-GB")
.unwrap()
.eval(&user_language),
false
);
assert_eq!(
SystemLanguage::from_attribute("DE")
.unwrap()
.eval(&user_language),
true
);
assert_eq!(
SystemLanguage::from_attribute("de-LU")
.unwrap()
.eval(&user_language),
true
);
assert_eq!(
SystemLanguage::from_attribute("fr, de")
.unwrap()
.eval(&user_language),
true
);
}
}
|
