// THIS FILE IS AUTOGENERATED.

// Any changes to this file will be overwritten.

// For more information about how codegen works, see font-codegen/README.md

#[allow(unused_imports)]

use crate::codegen_prelude::*;

impl<'a> MinByteRange<'a> for Cvar<'a> {

    fn min_byte_range(&self) -> Range<usize> {

        0..self.tuple_variation_headers_byte_range().end

    }

    fn min_table_bytes(&self) -> &'a [u8] {

        let range = self.min_byte_range();

        self.offset_data().as_bytes().get(range).unwrap_or_default()

    }

}

impl TopLevelTable for Cvar<'_> {

    /// `cvar`

    const TAG: Tag = Tag::new(b"cvar");

}

impl ReadArgs for Cvar<'_> {

    type Args = ();

}

impl<'a> FontRead<'a> for Cvar<'a> {

    fn read_with_args(data: FontData<'a>, _: ()) -> Result<Self, ReadError> {

        #[allow(clippy::absurd_extreme_comparisons)]

        if data.len() < Self::MIN_SIZE {

            return Err(ReadError::OutOfBounds);

        }

        let Some(data) = TableDataRef::new(data.as_bytes()) else {

            return Err(ReadError::OutOfBounds);

        };

        Ok(Self { data })

    }

}

/// The fields at the start of the table, which are read directly.

#[derive(Clone, Copy, bytemuck :: AnyBitPattern)]

#[repr(C, packed)]

#[doc(hidden)]

pub struct CvarFixedHeader {

    pub version: BigEndian<MajorMinor>,

    pub tuple_variation_count: BigEndian<TupleVariationCount>,

    pub data_offset: BigEndian<Offset16>,

}

#[allow(clippy::absurd_extreme_comparisons)]

const _: () = assert!(std::mem::size_of::<CvarFixedHeader>() <= Cvar::MIN_SIZE);

/// The [cvar](https://learn.microsoft.com/en-us/typography/opentype/spec/cvar) table.

#[derive(Clone)]

pub struct Cvar<'a> {

    data: TableDataRef<'a, CvarFixedHeader>,

}

#[allow(clippy::needless_lifetimes)]

impl<'a> Cvar<'a> {

    pub const MIN_SIZE: usize =

        (MajorMinor::RAW_BYTE_LEN + TupleVariationCount::RAW_BYTE_LEN + Offset16::RAW_BYTE_LEN);

    basic_table_impls!(impl_the_methods);

    /// Major/minor version number of the CVT variations table — set to (1,0).

    pub fn version(&self) -> MajorMinor {

        self.data.header().version.get()

    }

    /// A packed field. The high 4 bits are flags, and the low 12 bits

    /// are the number of tuple variation tables for this glyph. The

    /// number of tuple variation tables can be any number between 1

    /// and 4095.

    pub fn tuple_variation_count(&self) -> TupleVariationCount {

        self.data.header().tuple_variation_count.get()

    }

    /// Offset from the start of the 'cvar' table to the serialized data.

    pub fn data_offset(&self) -> Offset16 {

        self.data.header().data_offset.get()

    }

    /// Attempt to resolve [`data_offset`][Self::data_offset].

    pub fn data(&self) -> Result<FontData<'a>, ReadError> {

        let data = self.offset_data();

        self.data_offset().resolve(data)

    }

    /// Array of tuple variation headers.

    pub fn tuple_variation_headers(&self) -> VarLenArray<'a, TupleVariationHeader<'a>> {

        let range = self.tuple_variation_headers_byte_range();

        self.offset_data()

            .split_off(range.start)

            .and_then(|d| VarLenArray::read(d).ok())

            .unwrap_or_default()

    }

    pub fn version_byte_range(&self) -> Range<usize> {

        let start = 0;

        let end = start + MajorMinor::RAW_BYTE_LEN;

        start..end

    }

    pub fn tuple_variation_count_byte_range(&self) -> Range<usize> {

        let start = self.version_byte_range().end;

        let end = start + TupleVariationCount::RAW_BYTE_LEN;

        start..end

    }

    pub fn data_offset_byte_range(&self) -> Range<usize> {

        let start = self.tuple_variation_count_byte_range().end;

        let end = start + Offset16::RAW_BYTE_LEN;

        start..end

    }

    pub fn tuple_variation_headers_byte_range(&self) -> Range<usize> {

        let start = self.data_offset_byte_range().end;

        let end = start + self.offset_data().len().saturating_sub(start);

        start..end

    }

}

const _: () = assert!(FontData::default_data_long_enough(Cvar::MIN_SIZE));

impl Default for Cvar<'_> {

    fn default() -> Self {

        Self {

            data: TableDataRef::new(FontData::default_table_data().as_bytes())

                .unwrap_or_else(|| unreachable!("the default data covers MIN_SIZE")),

        }

    }

}