// 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::*;

/// The [vmtx (Vertical Metrics)](https://docs.microsoft.com/en-us/typography/opentype/spec/vmtx) table

#[derive(Debug, Clone, Copy)]

#[doc(hidden)]

pub struct VmtxMarker {

    v_metrics_byte_len: usize,

    top_side_bearings_byte_len: usize,

}

impl VmtxMarker {

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

        let start = 0;

        start..start + self.v_metrics_byte_len

    }

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

        let start = self.v_metrics_byte_range().end;

        start..start + self.top_side_bearings_byte_len

    }

}

impl MinByteRange for VmtxMarker {

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

        0..self.top_side_bearings_byte_range().end

    }

}

impl TopLevelTable for Vmtx<'_> {

    /// `vmtx`

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

}

impl ReadArgs for Vmtx<'_> {

    type Args = u16;

}

impl<'a> FontReadWithArgs<'a> for Vmtx<'a> {

    fn read_with_args(data: FontData<'a>, args: &u16) -> Result<Self, ReadError> {

        let number_of_long_ver_metrics = *args;

        let mut cursor = data.cursor();

        let v_metrics_byte_len = (number_of_long_ver_metrics as usize)

            .checked_mul(LongMetric::RAW_BYTE_LEN)

            .ok_or(ReadError::OutOfBounds)?;

        cursor.advance_by(v_metrics_byte_len);

        let top_side_bearings_byte_len =

            cursor.remaining_bytes() / i16::RAW_BYTE_LEN * i16::RAW_BYTE_LEN;

        cursor.advance_by(top_side_bearings_byte_len);

        cursor.finish(VmtxMarker {

            v_metrics_byte_len,

            top_side_bearings_byte_len,

        })

    }

}

impl<'a> Vmtx<'a> {

    /// A constructor that requires additional arguments.

    ///

    /// This type requires some external state in order to be

    /// parsed.

    pub fn read(data: FontData<'a>, number_of_long_ver_metrics: u16) -> Result<Self, ReadError> {

        let args = number_of_long_ver_metrics;

        Self::read_with_args(data, &args)

    }

}

/// The [vmtx (Vertical Metrics)](https://docs.microsoft.com/en-us/typography/opentype/spec/vmtx) table

pub type Vmtx<'a> = TableRef<'a, VmtxMarker>;

#[allow(clippy::needless_lifetimes)]

impl<'a> Vmtx<'a> {

    /// Paired advance height and top side bearing values for each

    /// glyph. Records are indexed by glyph ID.

    pub fn v_metrics(&self) -> &'a [LongMetric] {

        let range = self.shape.v_metrics_byte_range();

        self.data.read_array(range).unwrap()

    }

    /// Top side bearings for glyph IDs greater than or equal to numberOfLongMetrics.

    pub fn top_side_bearings(&self) -> &'a [BigEndian<i16>] {

        let range = self.shape.top_side_bearings_byte_range();

        self.data.read_array(range).unwrap()

    }

}

#[cfg(feature = "experimental_traverse")]

impl<'a> SomeTable<'a> for Vmtx<'a> {

    fn type_name(&self) -> &str {

        "Vmtx"

    }

    fn get_field(&self, idx: usize) -> Option<Field<'a>> {

        match idx {

            0usize => Some(Field::new(

                "v_metrics",

                traversal::FieldType::array_of_records(

                    stringify!(LongMetric),

                    self.v_metrics(),

                    self.offset_data(),

                ),

            )),

            1usize => Some(Field::new("top_side_bearings", self.top_side_bearings())),

            _ => None,

        }

    }

}

#[cfg(feature = "experimental_traverse")]

#[allow(clippy::needless_lifetimes)]

impl<'a> std::fmt::Debug for Vmtx<'a> {

    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {

        (self as &dyn SomeTable<'a>).fmt(f)

    }

}