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//! Based on https://github.com/zeon256/minimal-typst-svg-renderer
use std::path::PathBuf;
use typst::Library;
use typst::LibraryExt;
use typst::World;
use typst::diag::{FileError, FileResult};
use typst::foundations::{Bytes, Datetime};
use typst::syntax::{FileId, Source};
use typst::text::{Font, FontBook};
use typst::utils::LazyHash;
use typst_kit::fonts::{FontSlot, Fonts};
/// Main interface that determines the environment for Typst.
pub struct MinimalWorld {
/// The content of a source.
source: Source,
/// The standard library.
library: LazyHash<Library>,
/// Metadata about all known fonts.
book: LazyHash<FontBook>,
/// Metadata about all known fonts.
fonts: Vec<FontSlot>,
}
impl MinimalWorld {
pub fn new(source: impl Into<String>) -> Self {
let mut searcher = Fonts::searcher();
searcher.include_system_fonts(true);
#[cfg(feature = "embed-fonts")]
searcher.include_embedded_fonts(true);
let fonts = searcher.search();
Self {
library: LazyHash::new(Library::default()),
book: LazyHash::new(fonts.book),
fonts: fonts.fonts,
source: Source::detached(source),
}
}
}
impl World for MinimalWorld {
/// Standard library.
fn library(&self) -> &LazyHash<Library> {
&self.library
}
/// Metadata about all known Books.
fn book(&self) -> &LazyHash<FontBook> {
&self.book
}
/// Accessing the main source file.
fn main(&self) -> FileId {
self.source.id()
}
/// Accessing a specified source file (based on `FileId`).
fn source(&self, id: FileId) -> FileResult<Source> {
if id == self.source.id() {
Ok(self.source.clone())
} else {
Err(FileError::NotFound(PathBuf::new()))
}
}
/// Accessing a specified file (non-file).
fn file(&self, _id: FileId) -> FileResult<Bytes> {
Err(FileError::NotFound(PathBuf::new()))
}
/// Accessing a specified font per index of font book.
fn font(&self, id: usize) -> Option<Font> {
self.fonts.get(id)?.get()
}
/// Get the current date.
///
/// Optionally, an offset in hours is given.
fn today(&self, _offset: Option<i64>) -> Option<Datetime> {
None
}
}
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