Enum Node 

pub enum Node<'arena> {
    Number(&'arena str),
    IdentifierChar(SuperChar, LetterAttr),
    IdentifierStr(&'arena str),
    Operator {
        op: MathMLOperator,
        attrs: OpAttrs,
        size: Option<Size>,
        left: Option<MathSpacing>,
        right: Option<MathSpacing>,
    },
    PseudoOp {
        attrs: OpAttrs,
        left: Option<MathSpacing>,
        right: Option<MathSpacing>,
        name: &'arena str,
    },
    Space(Length),
    Sub {
        target: &'arena Node<'arena>,
        symbol: &'arena Node<'arena>,
    },
    Sup {
        target: &'arena Node<'arena>,
        symbol: &'arena Node<'arena>,
    },
    SubSup {
        target: &'arena Node<'arena>,
        sub: &'arena Node<'arena>,
        sup: &'arena Node<'arena>,
    },
    OverAccent(MathMLOperator, OpAttrs, &'arena Node<'arena>),
    UnderAccent(MathMLOperator, OpAttrs, &'arena Node<'arena>),
    Over {
        symbol: &'arena Node<'arena>,
        target: &'arena Node<'arena>,
    },
    Under {
        symbol: &'arena Node<'arena>,
        target: &'arena Node<'arena>,
    },
    UnderOver {
        target: &'arena Node<'arena>,
        under: &'arena Node<'arena>,
        over: &'arena Node<'arena>,
    },
    Sqrt(&'arena Node<'arena>),
    Root(&'arena Node<'arena>, &'arena Node<'arena>),
    Frac {
        num: &'arena Node<'arena>,
        denom: &'arena Node<'arena>,
        lt_value: LengthValue,
        lt_unit: LengthUnit,
        attr: Option<FracAttr>,
    },
    Row {
        nodes: &'arena [&'arena Node<'arena>],
        attrs: RowAttrs,
    },
    Padded {
        node: &'arena Node<'arena>,
        width_0: bool,
        height_0: bool,
    },
    Phantom {
        node: &'arena Node<'arena>,
    },
    Text(Option<HtmlTextStyle>, Option<HtmlTextSize>, &'arena str),
    AHref(&'arena AHref<'arena>),
    Table {
        align: Alignment,
        style: Option<Style>,
        content: &'arena [&'arena Node<'arena>],
    },
    EquationArray {
        align: Alignment,
        last_row_info: Option<&'arena RowLabelInfo<'arena>>,
        content: &'arena [&'arena Node<'arena>],
    },
    MultLine {
        num_rows: NonZeroU16,
        last_row_info: Option<&'arena RowLabelInfo<'arena>>,
        content: &'arena [&'arena Node<'arena>],
    },
    Array {
        style: Option<Style>,
        array_spec: &'arena ArraySpec<'arena>,
        content: &'arena [&'arena Node<'arena>],
    },
    ColumnSeparator,
    RowSeparator {
        tag: Option<NonZeroU16>,
        link_target: Option<&'arena str>,
    },
    Enclose {
        content: &'arena Node<'arena>,
        notation: Notation,
    },
    Multiscripts {
        base: &'arena Node<'arena>,
        pre: &'arena &'arena [MultiscriptPair<'arena>],
        post: &'arena &'arena [MultiscriptPair<'arena>],
    },
    UnknownCommand(&'arena str),
}

AST node

Variants

Number(&'arena str)

<mn>...</mn>

IdentifierChar(SuperChar, LetterAttr)

<mi>...</mi> for a SuperChar.

IdentifierStr(&'arena str)

<mi>...</mi> for a string.

Operator

<mo>...</mo> for a single character.

Fields

op: MathMLOperator

attrs: OpAttrs

size: Option<Size>

left: Option<MathSpacing>

right: Option<MathSpacing>

PseudoOp

<mo>...</mo> for a string.

Fields

attrs: OpAttrs

left: Option<MathSpacing>

right: Option<MathSpacing>

name: &'arena str

Space(Length)

<mspace width="..."/>

Sub

<msub>...</msub>

Fields

target: &'arena Node<'arena>

symbol: &'arena Node<'arena>

Sup

<msup>...</msup>

Fields

target: &'arena Node<'arena>

symbol: &'arena Node<'arena>

SubSup

<msubsup>...</msubsup>

Fields

target: &'arena Node<'arena>

sub: &'arena Node<'arena>

sup: &'arena Node<'arena>

OverAccent(MathMLOperator, OpAttrs, &'arena Node<'arena>)

<mover accent="true">...</mover>

UnderAccent(MathMLOperator, OpAttrs, &'arena Node<'arena>)

<munder accentunder="true">...</munder>

Over

<mover>...</mover>

Fields

symbol: &'arena Node<'arena>

target: &'arena Node<'arena>

Under

<munder>...</munder>

Fields

symbol: &'arena Node<'arena>

target: &'arena Node<'arena>

UnderOver

<munderover>...</munderover>

Fields

target: &'arena Node<'arena>

under: &'arena Node<'arena>

over: &'arena Node<'arena>

Sqrt(&'arena Node<'arena>)

<msqrt>...</msqrt>

Root(&'arena Node<'arena>, &'arena Node<'arena>)

<mroot>...</mroot>

Frac

<mfrac>...</mfrac>

Fields

num: &'arena Node<'arena>

Numerator

denom: &'arena Node<'arena>

Denominator

lt_value: LengthValue

Line thickness

lt_unit: LengthUnit

attr: Option<FracAttr>

Row

<mrow>...</mrow>

Fields

nodes: &'arena [&'arena Node<'arena>]

attrs: RowAttrs

Padded

<mpadded>...</mpadded>

Fields

node: &'arena Node<'arena>

width_0: bool

height_0: bool

Phantom

<mphantom>...</mphantom>

Fields

node: &'arena Node<'arena>

Text(Option<HtmlTextStyle>, Option<HtmlTextSize>, &'arena str)

<mtext>...</mtext>. The str gets HTML-escaped.

AHref(&'arena AHref<'arena>)

<mtext><a href="...">...</mtext>. The link and text get HTML-escaped.

Table

<mtable>...</mtable> for matrices and similar constructs

Fields

align: Alignment

style: Option<Style>

content: &'arena [&'arena Node<'arena>]

EquationArray

<mtable>...</mtable> for equation arrays like the align environment

Fields

align: Alignment

last_row_info: Option<&'arena RowLabelInfo<'arena>>

content: &'arena [&'arena Node<'arena>]

MultLine

<mtable>...</mtable> for the multline environment

Fields

num_rows: NonZeroU16

last_row_info: Option<&'arena RowLabelInfo<'arena>>

content: &'arena [&'arena Node<'arena>]

Array

<mtable>...</mtable> for arrays

Fields

style: Option<Style>

array_spec: &'arena ArraySpec<'arena>

content: &'arena [&'arena Node<'arena>]

ColumnSeparator

<mtd>...</mtd>

RowSeparator

<mtr>...</mtr>

Fields

tag: Option<NonZeroU16>

link_target: Option<&'arena str>

Enclose

<menclose>...</menclose>

Fields

content: &'arena Node<'arena>

notation: Notation

Multiscripts

<mmultiscripts>...</mmultiscripts> Double pointer indirection is to keep Node’s size down. Ideally we would use some sort of thinslice type

Fields

base: &'arena Node<'arena>

pre: &'arena &'arena [MultiscriptPair<'arena>]

post: &'arena &'arena [MultiscriptPair<'arena>]

UnknownCommand(&'arena str)

This node is used for displaying unknown commands. We are not using <merror> here because it’s rendered with a red border and a yellow background, which is not desirable for our use case. We’ll just render it as <mtext> with a custom style.

Implementations

impl Node<'_>

pub const EMPTY_ROW: Self

pub fn emit(&self, s: &mut String, base_indent: usize) -> Result

Trait Implementations

impl<'arena> Debug for Node<'arena>

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

Formats the value using the given formatter.