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        let end = start + u32::RAW_BYTE_LEN;
71        start..end
72    }
73
74    pub fn flags_byte_range(&self) -> Range<usize> {
75        let start = self.version_byte_range().end;
76        let end = start + u32::RAW_BYTE_LEN;
77        start..end
78    }
79
80    pub fn num_tags_byte_range(&self) -> Range<usize> {
81        let start = self.flags_byte_range().end;
82        let end = start + u32::RAW_BYTE_LEN;
83        start..end
84    }
85
86    pub fn tag_ranges_byte_range(&self) -> Range<usize> {
87        let num_tags = self.num_tags();
88        let start = self.num_tags_byte_range().end;
89        let end =
90            start + (transforms::to_usize(num_tags)).saturating_mul(FTStringRange::RAW_BYTE_LEN);
91        start..end
92    }
93}
94
95const _: () = assert!(FontData::default_data_long_enough(Ltag::MIN_SIZE));
96
97impl Default for Ltag<'_> {
98    fn default() -> Self {
99        Self {
100            data: FontData::default_table_data(),
101        }
102    }
103}
104
105#[cfg(feature = "experimental_traverse")]
106impl<'a> SomeTable<'a> for Ltag<'a> {
107    fn type_name(&self) -> &str {
108        "Ltag"
109    }
110    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
111        match idx {
112            0usize => Some(Field::new("version", self.version())),
113            1usize => Some(Field::new("flags", self.flags())),
114            2usize => Some(Field::new("num_tags", self.num_tags())),
115            3usize => Some(Field::new(
116                "tag_ranges",
117                traversal::FieldType::array_of_records(
118                    stringify!(FTStringRange),
119                    self.tag_ranges(),
120                    self.offset_data(),
121                ),
122            )),
123            _ => None,
124        }
125    }
126}
127
128#[cfg(feature = "experimental_traverse")]
129#[allow(clippy::needless_lifetimes)]
130impl<'a> std::fmt::Debug for Ltag<'a> {
131    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
132        (self as &dyn SomeTable<'a>).fmt(f)
133    }
134}
135
136/// Offset and length of string in `ltag` table.
137#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
138#[repr(C)]
139#[repr(packed)]
140pub struct FTStringRange {
141    /// Offset from the start of the table to the beginning of the string.
142    pub offset: BigEndian<u16>,
143    /// String length (in bytes).
144    pub length: BigEndian<u16>,
145}
146
147impl FTStringRange {
148    /// Offset from the start of the table to the beginning of the string.
149    pub fn offset(&self) -> u16 {
150        self.offset.get()
151    }
152
153    /// String length (in bytes).
154    pub fn length(&self) -> u16 {
155        self.length.get()
156    }
157}
158
159impl FixedSize for FTStringRange {
160    const RAW_BYTE_LEN: usize = u16::RAW_BYTE_LEN + u16::RAW_BYTE_LEN;
161}
162
163#[cfg(feature = "experimental_traverse")]
164impl<'a> SomeRecord<'a> for FTStringRange {
165    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
166        RecordResolver {
167            name: "FTStringRange",
168            get_field: Box::new(move |idx, _data| match idx {
169                0usize => Some(Field::new("offset", self.offset())),
170                1usize => Some(Field::new("length", self.length())),
171                _ => None,
172            }),
173            data,
174        }
175    }
176}
read_fonts/generated/generated_ltag.rs

read_fonts/generated/
generated_ltag.rs
