Module presentation 

Presentation MathML rendering rules.

Port of LaTeXML::Post::MathML::Presentation (146 lines) + the presentation portion of LaTeXML::Post::MathML (main module, ~1000 lines). Converts XMath nodes to Presentation MathML elements (mi, mo, mn, mrow, etc.).

Key concepts:

• pmml(node) dispatches conversion by tag (XMTok, XMApp, XMDual, etc.)
• stylizeContent(item, tag) determines text, mathvariant, size, spacing
• Scripts (sub/sup/under/over) handle pre/mid/post positioning
• Style context tracks display/text/script/scriptscript levels

Enums

MathStyle

Math style levels.

Functions

adjust_spacing

Walk the MathML tree and adjust spacing. Port of Perl adjust_spacing / space_walk (MathML.pm L1079-1133): resolves the difference between TeX’s inter-atom spacing and MathML’s operator-dictionary spacing.

clean_internal_attrs

Clean up internal _role/_lspace/_rspace attributes before serialization.

convert_to_pmml

Convert an XMath tree to Presentation MathML.

font_to_mathvariant

Map a LaTeXML font name to a MathML mathvariant value.

set_invisible_times

Set whether to emit invisible times (called by MathML processor before rendering).

set_plane1

Set the Plane-1 remapping mode (called by the MathML processor before rendering). Mirrors Perl preprocess L69-71: hackplane1 implies plane1.