Crate carta 

carta — a document converter library.

The public entry points: convert handles any format pair, taking raw bytes and returning an Output that is text or bytes depending on the target format’s wire shape; convert_text is a shortcut for when both sides are text. Formats are selected at compile time via per-direction Cargo features (read-*/write-*); supported_input_formats/supported_output_formats report what this build contains. For lower-level use, the document model is re-exported as ast, and reader_for/writer_for hand back the Reader/Writer trait objects so callers can inspect or transform the Document directly.

Re-exports

pub use carta_ast as ast;

Modules

media

The media bag: a document’s embedded resources — images and other binary payloads — carried alongside the syntax tree rather than inside it.

presets

Per-flavor extension sets.

walk

Mutable traversals over the document model.

Structs

Document

A whole document: schema version, metadata, and the block sequence.

EpubOptions

Options for the EPUB container writer. Ignored by every other writer. The default is an empty book: no cover, no embedded fonts, the built-in stylesheet only, and chapters split at the top heading level.

Extensions

A deterministic, allocation-free set of Extensions, backed by a fixed array of 64-bit words indexed by each variant’s position in Extension::ALL.

MediaBag

A document’s embedded resources, keyed by the name the document references each one under.

MediaItem

One entry in a MediaBag: a resource’s bytes together with its MIME type, when the source recorded one.

ReaderOptions

Options controlling a Reader. Extended (not resignatured) as real options land.

WriterOptions

Options controlling a Writer. Extended (not resignatured) as real options land.

Enums

AnyReader

A resolved reader, either text-shaped (Reader) or byte-shaped (BytesReader).

AnyWriter

A resolved writer, either text-shaped (Writer) or byte-shaped (BytesWriter).

Error

The error type returned across the conversion pipeline.

Extension

A single format extension. Each variant’s position in Extension::ALL is its bit index in Extensions.

MathMethod

How math is presented by a format that offers a choice of renderers (the HTML family). The method decides both the inline markup inside a span.math and which loader a standalone document pulls in to typeset it: a MathJax (or plain) document carries the source TeX wrapped in \(…\) / \[…\], whereas a KaTeX document carries the bare TeX, which its in-browser loader reads from the span directly.

Output

The output of a conversion: text from a text writer, bytes from a byte-shaped writer.

TocStyle

How a writer supplies a table of contents.

WrapMode

How a text writer lays out the lines of a paragraph.

Traits

BytesReader

Parses input bytes in some source format into the document model. The byte-shaped counterpart of Reader, for formats whose wire form is not text — zip containers and the like.

BytesWriter

Renders the document model into some target format’s bytes. The byte-shaped counterpart of Writer, for formats whose output is not text — zip containers and the like.

Reader

Parses input text in some source format into the document model.

Writer

Renders the document model into some target format’s text.

Functions

any_reader_for

Resolves a format name to its AnyReader.

any_writer_for

Resolves a format name to its AnyWriter.

convert

Converts raw input bytes from format from to format to, returning text for a text target and bytes for a byte-shaped one.

convert_text

Converts text input from format from to text in format to.

format_extensions

Lists every extension carta models, each paired with whether format enables it by default.

input_format_names

Every accepted Reader format name in this build — canonical names and their aliases — sorted.

merge_metadatastandalone

Folds the extra metadata layers carried in writer_options into document.meta: the metadata-file defaults sit below the document’s own values, and the -M layer above them.

output_format_names

Every accepted Writer format name in this build — canonical names and their aliases — sorted.

parse_format_spec

Splits a format specifier into its base name and the Extensions it selects.

parse_metadata_filemetadata-file

Parses a metadata file into a metadata map, for use as WriterOptions::metadata_defaults.

read_document

Parses input in format from into the document model together with the embedded resources it references (a notebook’s image outputs; empty for a format that carries none).

reader_for

Resolves a format name to its boxed Reader, the text-only view of any_reader_for.

render_document

Renders document into format to, returning text for a text target and bytes for a byte-shaped one. media supplies the embedded resources a re-embedding writer (a notebook re-encoding its image outputs) draws on; pass an empty bag when the document references none.

supported_input_formats

The canonical names of every compiled-in Reader format, in declaration order.

supported_output_formats

The canonical names of every compiled-in Writer format, in declaration order.

writer_for

Resolves a format name to its boxed Writer, the text-only view of any_writer_for.

Type Aliases

Result

A Result whose error is Error.