feat: convert TypstDocument to enum (#1256)

* feat: convert `TypstDocument` to enum

* fix: errors

* build: update cargo.lock

* fix: warnings

* fix: error

* html changes

* Revert "html changes"

This reverts commit f9fc0e4872.

* Revert "Revert "html changes""

This reverts commit 7dc554a9e4.

* use std typst docs

* span

* paged

* paged

* html change

* paged

* html change

* bytes

* paged

* paged

* paged

* html changes

* paged

* html changes

* paged

crates/tinymist-std/src/concepts/mod.rs

@@ -14,6 +14,9 @@ pub use read::*;
 mod marker;
 pub use marker::*;
 
+#[cfg(feature = "typst")]
+pub mod typst;
+
 /// An immutable string.
 pub type ImmutStr = Arc<str>;
 /// An immutable byte slice.

crates/tinymist-std/src/concepts/typst.rs

@@ -0,0 +1,58 @@
+//! Re-export of the typst crate.
+pub(crate) mod well_known {
+    pub use typst::foundations::Bytes;
+
+    pub use typst::utils::LazyHash;
+
+    /// Although this is not good to expose this, we make an alias here to
+    /// let it as a part of typst-ts.
+    pub use typst::syntax::FileId as TypstFileId;
+
+    pub use typst::World as TypstWorld;
+
+    pub use typst::layout::Abs as TypstAbs;
+
+    pub use typst::model::Document as TypstPagedDocument;
+
+    pub use typst::text::Font as TypstFont;
+
+    pub use typst::foundations::Dict as TypstDict;
+
+    pub use typst::foundations::Datetime as TypstDatetime;
+
+    pub use typst::{diag, foundations, syntax};
+}
+
+/// The enum of all well-known Typst documents.
+#[derive(Debug, Clone)]
+pub enum TypstDocument {
+    /// The document compiled with `paged` target.
+    Paged(Arc<well_known::TypstPagedDocument>),
+}
+
+impl TypstDocument {
+    /// Gets details about the document.
+    pub fn info(&self) -> &typst::model::DocumentInfo {
+        match self {
+            Self::Paged(doc) => &doc.info,
+        }
+    }
+
+    /// Gets the introspector that can be queried for elements and their
+    /// positions.
+    pub fn introspector(&self) -> &typst::introspection::Introspector {
+        match self {
+            Self::Paged(doc) => &doc.introspector,
+        }
+    }
+}
+
+use std::sync::Arc;
+
+pub use well_known::*;
+
+/// The prelude of the Typst module.
+pub mod prelude {
+    pub use comemo::Prehashed;
+    pub use ecow::{eco_format, eco_vec, EcoString, EcoVec};
+}