Struct MathInfo 

pub struct MathInfo {
    pub rows_span: Range<usize>,
    pub row: usize,
    pub glyph: Option<usize>,
    pub tex: String,
    pub display: bool,
    pub src: usize,
}

One formula as a frontend sees it: where its picture goes, and the TeX to typeset for it. Two shapes, told apart by glyph:

• An inline atom — $E = mc^2$ in a line of prose — is one Role::Math glyph on row at index glyph, standing for the whole formula. A frontend that paints pictures in a line typesets the TeX at the run’s font size and draws the picture in the glyph’s place, as wide as the picture is and with the text baseline through it at its height — a run delegate on Apple, an inline element on the web. The glyph is a caret stop at the formula’s start; the stop after it is the next glyph’s.
• A display block — a paragraph holding nothing but $$…$$ — is the placeholder row (∑ tex, every glyph at the formula’s start) plus the blank fillers rows_span reserves under it, exactly a MediaInfo’s shape. A frontend skips those rows and paints the picture there, centred on the measure.

Either way the frontend supplies the width: core lays out in glyphs and cannot know how wide a typeset formula is, which is why an inline atom is one glyph and not a run of them. Only in a column-wrapped build does that matter to the wrap: a terminal never asks for atoms (see Surface::inline_pictures), and the web re-fits a row the picture overflows.

A plain surface paints the glyphs as they are — ∑ for an atom, the labelled row for a block — and needs none of this. Derived from VRow::math by [math_spans], so it survives the row reuse of BlockCache and build_spliced.

Fields

rows_span: Range<usize>

The VisualMap::rows rows this formula occupies: row..row + 1 for an atom, the placeholder row and its fillers for a block.

row: usize

The row the atom glyph, or the block’s placeholder label, is on.

glyph: Option<usize>

The atom’s index into that row’s glyphs, or None for a block.

tex: String

The TeX between the delimiters, verbatim.

display: bool

Display style rather than text style — see MathMark::display.

src: usize

The formula’s source start: where a click on its picture lands the caret, and the same offset every placeholder glyph carries.

Trait Implementations

impl Clone for MathInfo

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MathInfo

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

Formats the value using the given formatter.

impl Eq for MathInfo

impl PartialEq for MathInfo

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for MathInfo