feature fixes

src/api/pdf.ts

@@ -0,0 +1,20 @@
+// PDF export. The source is built here and compiled there; these two calls are the boundary.
+
+import { call, type ImageInput } from "../ipc";
+
+/**
+ * Compiles Typst source to PDF bytes. Warnings do not come back through the return value, because
+ * the answer is raw bytes and has no room for a second one: they arrive on `pdf-warnings` instead.
+ */
+export const pdfCompile = (source: string, images: readonly ImageInput[]) =>
+  call<ArrayBuffer>("pdf_compile", { source, images });
+
+/**
+ * Writes the finished file wherever the native save panel pointed.
+ *
+ * `Array.from` because the IPC boundary is JSON and a `Uint8Array` stringifies to an object with
+ * numeric keys, which is not a `Vec<u8>` on the other side. One export's worth of numbers is the
+ * cost of not inventing a second transport for a thing that happens once per document.
+ */
+export const pdfWrite = (path: string, bytes: Uint8Array) =>
+  call<void>("pdf_write", { path, bytes: Array.from(bytes) });