read_fonts/generated/
generated_ltag.rs

1// THIS FILE IS AUTOGENERATED.
2// Any changes to this file will be overwritten.
3// For more information about how codegen works, see font-codegen/README.md
4
5#[allow(unused_imports)]
6use crate::codegen_prelude::*;
7
8/// The [language tag](https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6ltag.html) table.
9#[derive(Debug, Clone, Copy)]
10#[doc(hidden)]
11pub struct LtagMarker {
12    tag_ranges_byte_len: usize,
13}
14
15impl LtagMarker {
16    pub fn version_byte_range(&self) -> Range<usize> {
17        let start = 0;
18        start..start + u32::RAW_BYTE_LEN
19    }
20
21    pub fn flags_byte_range(&self) -> Range<usize> {
22        let start = self.version_byte_range().end;
23        start..start + u32::RAW_BYTE_LEN
24    }
25
26    pub fn num_tags_byte_range(&self) -> Range<usize> {
27        let start = self.flags_byte_range().end;
28        start..start + u32::RAW_BYTE_LEN
29    }
30
31    pub fn tag_ranges_byte_range(&self) -> Range<usize> {
32        let start = self.num_tags_byte_range().end;
33        start..start + self.tag_ranges_byte_len
34    }
35}
36
37impl MinByteRange for LtagMarker {
38    fn min_byte_range(&self) -> Range<usize> {
39        0..self.tag_ranges_byte_range().end
40    }
41}
42
43impl TopLevelTable for Ltag<'_> {
44    /// `ltag`
45    const TAG: Tag = Tag::new(b"ltag");
46}
47
48impl<'a> FontRead<'a> for Ltag<'a> {
49    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
50        let mut cursor = data.cursor();
51        cursor.advance::<u32>();
52        cursor.advance::<u32>();
53        let num_tags: u32 = cursor.read()?;
54        let tag_ranges_byte_len = (num_tags as usize)
55            .checked_mul(FTStringRange::RAW_BYTE_LEN)
56            .ok_or(ReadError::OutOfBounds)?;
57        cursor.advance_by(tag_ranges_byte_len);
58        cursor.finish(LtagMarker {
59            tag_ranges_byte_len,
60        })
61    }
62}
63
64/// The [language tag](https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6ltag.html) table.
65pub type Ltag<'a> = TableRef<'a, LtagMarker>;
66
67#[allow(clippy::needless_lifetimes)]
68impl<'a> Ltag<'a> {
69    /// Table version; currently 1.
70    pub fn version(&self) -> u32 {
71        let range = self.shape.version_byte_range();
72        self.data.read_at(range.start).unwrap()
73    }
74
75    /// Table flags; currently none defined.
76    pub fn flags(&self) -> u32 {
77        let range = self.shape.flags_byte_range();
78        self.data.read_at(range.start).unwrap()
79    }
80
81    /// Number of language tags which follow.
82    pub fn num_tags(&self) -> u32 {
83        let range = self.shape.num_tags_byte_range();
84        self.data.read_at(range.start).unwrap()
85    }
86
87    /// Range of each tag's string.
88    pub fn tag_ranges(&self) -> &'a [FTStringRange] {
89        let range = self.shape.tag_ranges_byte_range();
90        self.data.read_array(range).unwrap()
91    }
92}
93
94#[cfg(feature = "experimental_traverse")]
95impl<'a> SomeTable<'a> for Ltag<'a> {
96    fn type_name(&self) -> &str {
97        "Ltag"
98    }
99    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
100        match idx {
101            0usize => Some(Field::new("version", self.version())),
102            1usize => Some(Field::new("flags", self.flags())),
103            2usize => Some(Field::new("num_tags", self.num_tags())),
104            3usize => Some(Field::new(
105                "tag_ranges",
106                traversal::FieldType::array_of_records(
107                    stringify!(FTStringRange),
108                    self.tag_ranges(),
109                    self.offset_data(),
110                ),
111            )),
112            _ => None,
113        }
114    }
115}
116
117#[cfg(feature = "experimental_traverse")]
118#[allow(clippy::needless_lifetimes)]
119impl<'a> std::fmt::Debug for Ltag<'a> {
120    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
121        (self as &dyn SomeTable<'a>).fmt(f)
122    }
123}
124
125/// Offset and length of string in `ltag` table.
126#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
127#[repr(C)]
128#[repr(packed)]
129pub struct FTStringRange {
130    /// Offset from the start of the table to the beginning of the string.
131    pub offset: BigEndian<u16>,
132    /// String length (in bytes).
133    pub length: BigEndian<u16>,
134}
135
136impl FTStringRange {
137    /// Offset from the start of the table to the beginning of the string.
138    pub fn offset(&self) -> u16 {
139        self.offset.get()
140    }
141
142    /// String length (in bytes).
143    pub fn length(&self) -> u16 {
144        self.length.get()
145    }
146}
147
148impl FixedSize for FTStringRange {
149    const RAW_BYTE_LEN: usize = u16::RAW_BYTE_LEN + u16::RAW_BYTE_LEN;
150}
151
152#[cfg(feature = "experimental_traverse")]
153impl<'a> SomeRecord<'a> for FTStringRange {
154    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
155        RecordResolver {
156            name: "FTStringRange",
157            get_field: Box::new(move |idx, _data| match idx {
158                0usize => Some(Field::new("offset", self.offset())),
159                1usize => Some(Field::new("length", self.length())),
160                _ => None,
161            }),
162            data,
163        }
164    }
165}
read_fonts/generated/generated_ltag.rs

read_fonts/generated/
generated_ltag.rs
