Set up typst wasm plugin

Cargo.lock

@@ -2533,6 +2533,13 @@ dependencies = [
  "typst-render",
 ]
 
+[[package]]
+name = "showbits-typst-plugin"
+version = "0.0.0"
+dependencies = [
+ "wasm-minimal-protocol",
+]
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.2"
@@ -3516,6 +3523,16 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "venial"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61584a325b16f97b5b25fcc852eb9550843a251057a5e3e5992d2376f3df4bb2"
+dependencies = [
+ "proc-macro2",
+ "quote",
+]
+
 [[package]]
 name = "version-compare"
 version = "0.2.0"
@@ -3611,6 +3628,16 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "wasm-minimal-protocol"
+version = "0.1.0"
+source = "git+https://github.com/astrale-sharp/wasm-minimal-protocol.git?rev=90336ebf2d99844fd8f8e99ea7096af96526cbf4#90336ebf2d99844fd8f8e99ea7096af96526cbf4"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "venial",
+]
+
 [[package]]
 name = "wasmi"
 version = "0.40.0"

Cargo.toml

@@ -5,6 +5,7 @@ members = [
     "showbits-common",
     "showbits-thermal-printer",
     "showbits-typst",
+    "showbits-typst-plugin",
 ]
 
 [workspace.package]
@@ -39,6 +40,10 @@ version = "0.7.6"
 default-features = false
 features = ["std", "taffy_tree", "flexbox", "grid", "block_layout"]
 
+[workspace.dependencies.wasm-minimal-protocol]
+git = "https://github.com/astrale-sharp/wasm-minimal-protocol.git"
+rev = "90336ebf2d99844fd8f8e99ea7096af96526cbf4"
+
 [workspace.lints]
 rust.unsafe_code = { level = "forbid", priority = 1 }
 # Lint groups

showbits-thermal-printer/src/documents.rs

@@ -5,5 +5,7 @@ pub use self::text::*;
 mod text;
 
 fn typst_with_lib() -> Typst {
-    Typst::new().with_file("/lib.typ", include_str!("documents/lib.typ"))
+    Typst::new()
+        .with_file("/lib.typ", include_str!("documents/lib.typ"))
+        .with_file("/plugin.wasm", include_bytes!("documents/plugin.wasm"))
 }

showbits-thermal-printer/src/documents/lib.typ

@@ -19,3 +19,5 @@
 // Determined by experiments so that the top and bottom white border are roughly
 // the same size after tearing off the paper.
 #let feed = v(64pt + 32pt)
+
+#import plugin("plugin.wasm") as plugin

showbits-thermal-printer/src/documents/plugin.wasm

@@ -0,0 +1 @@
+../../../target/wasm32-unknown-unknown/release/showbits_typst_plugin.wasm

showbits-thermal-printer/src/documents/text/plugin.wasm

@@ -0,0 +1 @@
+../plugin.wasm

showbits-typst-plugin/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "showbits-typst-plugin"
+version = { workspace = true }
+edition = { workspace = true }
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies.wasm-minimal-protocol]
+git = "https://github.com/astrale-sharp/wasm-minimal-protocol.git"
+rev = "90336ebf2d99844fd8f8e99ea7096af96526cbf4"
+
+[profile.release]
+lto = true        # Enable link-time optimization
+strip = true      # Strip symbols from binary*
+opt-level = 'z'   # Optimize for size
+codegen-units = 1 # Reduce number of codegen units to increase optimizations
+panic = 'abort'   # Abort on panic
+
+[lints]
+workspace = true

showbits-typst-plugin/meta/build

@@ -0,0 +1,5 @@
+#!/usr/bin/env fish
+
+cargo build --release \
+    --package showbits-typst-plugin \
+    --target wasm32-unknown-unknown

showbits-typst-plugin/meta/setup

@@ -0,0 +1,3 @@
+#!/usr/bin/env fish
+
+rustup target add wasm32-unknown-unknown

showbits-typst-plugin/src/lib.rs

@@ -0,0 +1,8 @@
+use wasm_minimal_protocol::*;
+
+initiate_protocol!();
+
+#[wasm_func]
+pub fn debug_print(arg: &[u8]) -> Vec<u8> {
+    format!("{arg:?}").into_bytes()
+}