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
8impl<'a> MinByteRange<'a> for Ltag<'a> {
9    fn min_byte_range(&self) -> Range<usize> {
10        0..self.tag_ranges_byte_range().end
11    }
12    fn min_table_bytes(&self) -> &'a [u8] {
13        let range = self.min_byte_range();
14        self.data.as_bytes().get(range).unwrap_or_default()
15    }
16}
17
18impl TopLevelTable for Ltag<'_> {
19    /// `ltag`
20    const TAG: Tag = Tag::new(b"ltag");
21}
22
23impl<'a> FontRead<'a> for Ltag<'a> {
24    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
25        #[allow(clippy::absurd_extreme_comparisons)]
26        if data.len() < Self::MIN_SIZE {
27            return Err(ReadError::OutOfBounds);
28        }
29        Ok(Self { data })
30    }
31}
32
33/// The [language tag](https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6ltag.html) table.
34#[derive(Clone)]
35pub struct Ltag<'a> {
36    data: FontData<'a>,
37}
38
39#[allow(clippy::needless_lifetimes)]
40impl<'a> Ltag<'a> {
41    pub const MIN_SIZE: usize = (u32::RAW_BYTE_LEN + u32::RAW_BYTE_LEN + u32::RAW_BYTE_LEN);
42    basic_table_impls!(impl_the_methods);
43
44    /// Table version; currently 1.
45    pub fn version(&self) -> u32 {
46        let range = self.version_byte_range();
47        self.data.read_at(range.start).ok().unwrap()
48    }
49
50    /// Table flags; currently none defined.
51    pub fn flags(&self) -> u32 {
52        let range = self.flags_byte_range();
53        self.data.read_at(range.start).ok().unwrap()
54    }
55
56    /// Number of language tags which follow.
57    pub fn num_tags(&self) -> u32 {
58        let range = self.num_tags_byte_range();
59        self.data.read_at(range.start).ok().unwrap()
60    }
61
62    /// Range of each tag's string.
63    pub fn tag_ranges(&self) -> &'a [FTStringRange] {
64        let range = self.tag_ranges_byte_range();
65        self.data.read_array(range).ok().unwrap_or_default()
66    }
67
68    pub fn version_byte_range(&self) -> Range<usize> {
69        let start = 0;
70        start..start + u32::RAW_BYTE_LEN
71    }
72
73    pub fn flags_byte_range(&self) -> Range<usize> {
74        let start = self.version_byte_range().end;
75        start..start + u32::RAW_BYTE_LEN
76    }
77
78    pub fn num_tags_byte_range(&self) -> Range<usize> {
79        let start = self.flags_byte_range().end;
80        start..start + u32::RAW_BYTE_LEN
81    }
82
83    pub fn tag_ranges_byte_range(&self) -> Range<usize> {
84        let num_tags = self.num_tags();
85        let start = self.num_tags_byte_range().end;
86        start..start + (num_tags as usize).saturating_mul(FTStringRange::RAW_BYTE_LEN)
87    }
88}
89
90#[cfg(feature = "experimental_traverse")]
91impl<'a> SomeTable<'a> for Ltag<'a> {
92    fn type_name(&self) -> &str {
93        "Ltag"
94    }
95    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
96        match idx {
97            0usize => Some(Field::new("version", self.version())),
98            1usize => Some(Field::new("flags", self.flags())),
99            2usize => Some(Field::new("num_tags", self.num_tags())),
100            3usize => Some(Field::new(
101                "tag_ranges",
102                traversal::FieldType::array_of_records(
103                    stringify!(FTStringRange),
104                    self.tag_ranges(),
105                    self.offset_data(),
106                ),
107            )),
108            _ => None,
109        }
110    }
111}
112
113#[cfg(feature = "experimental_traverse")]
114#[allow(clippy::needless_lifetimes)]
115impl<'a> std::fmt::Debug for Ltag<'a> {
116    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
117        (self as &dyn SomeTable<'a>).fmt(f)
118    }
119}
120
121/// Offset and length of string in `ltag` table.
122#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
123#[repr(C)]
124#[repr(packed)]
125pub struct FTStringRange {
126    /// Offset from the start of the table to the beginning of the string.
127    pub offset: BigEndian<u16>,
128    /// String length (in bytes).
129    pub length: BigEndian<u16>,
130}
131
132impl FTStringRange {
133    /// Offset from the start of the table to the beginning of the string.
134    pub fn offset(&self) -> u16 {
135        self.offset.get()
136    }
137
138    /// String length (in bytes).
139    pub fn length(&self) -> u16 {
140        self.length.get()
141    }
142}
143
144impl FixedSize for FTStringRange {
145    const RAW_BYTE_LEN: usize = u16::RAW_BYTE_LEN + u16::RAW_BYTE_LEN;
146}
147
148#[cfg(feature = "experimental_traverse")]
149impl<'a> SomeRecord<'a> for FTStringRange {
150    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
151        RecordResolver {
152            name: "FTStringRange",
153            get_field: Box::new(move |idx, _data| match idx {
154                0usize => Some(Field::new("offset", self.offset())),
155                1usize => Some(Field::new("length", self.length())),
156                _ => None,
157            }),
158            data,
159        }
160    }
161}
read_fonts/generated/generated_ltag.rs

read_fonts/generated/
generated_ltag.rs
