put function data into url on wasm

Author: bgkillas

Cargo.lock

@@ -50,7 +50,7 @@ softbuffer-wayland=["softbuffer/wayland"]
 rug=["kalc-lib/rug","kalc-lib"]
 fastnum=["kalc-lib/fastnum","kalc-lib"]
 kalc-lib=["dep:kalc-lib"]
-wasm=["dep:wasm-bindgen", "rupl/wasm"]
+wasm=["dep:wasm-bindgen", "rupl/wasm", "dep:web-sys", "dep:lz4_flex", "dep:base64"]
 wasm-draw=["rupl/wasm-draw", "wasm", "rupl/winit", "dep:winit"]
 wee=["dep:wee_alloc"]
 wasm-console = ["dep:console_error_panic_hook"]
@@ -65,7 +65,10 @@ dirs={version="6.0.0", optional=true}
 bitcode = {version="0.6.9",features = ["serde"],optional = true}
 serde = {version = "1.0.228", features = ["derive"], optional = true}
 rupl={version = "0.1.2",path="../rupl",default-features = false}
-kalc-lib={version="1.5.1",default-features=false,path="../kalc-lib",optional = true}
+kalc-lib={version="1.5.1",default-features=false,path="../kalc-lib",optional = true, features = ["fastrand"]}
 wasm-bindgen = {version="0.2.108",optional = true}
+web-sys = {version= "0.3.85", optional = true, features = ["Window","Location","History"]}
 console_error_panic_hook = { version = "0.1.7", optional = true }
 wee_alloc = {version = "0.4.5", optional = true}
+lz4_flex = {version="0.12.0", default-features = false, optional = true}
+base64 = {version="0.22.1", optional = true}

Cargo.toml

@@ -309,6 +309,18 @@ impl Data {
             i += 1;
         }
         let func = func.join("#").replace(";#", ";");
+        #[cfg(feature = "wasm")]
+        {
+            use base64::{Engine as _, engine::general_purpose::URL_SAFE};
+            let data = lz4_flex::compress_prepend_size(func.as_bytes());
+            let url = format!("#{}", URL_SAFE.encode(data));
+            web_sys::window()
+                .unwrap()
+                .history()
+                .unwrap()
+                .replace_state_with_url(&wasm_bindgen::JsValue::NULL, "", Some(&url))
+                .unwrap();
+        }
         let new_name;
         let old_len = self.data.len();
         (self.data, new_name, _) = init(&func, &mut self.options, self.vars.clone()).unwrap_or((

src/data.rs

@@ -47,8 +47,23 @@ pub fn main() {
     if !args.is_empty() {
         args.remove(0);
     }
+    #[cfg(not(feature = "wasm"))]
     let s = String::new();
+    #[cfg(not(feature = "wasm"))]
     let function = args.last().unwrap_or(&s);
+    #[cfg(feature = "wasm")]
+    let function: &String = &{
+        let mut hash = web_sys::window().unwrap().location().hash().unwrap();
+        if hash.is_empty() {
+            String::new()
+        } else {
+            use base64::{Engine as _, engine::general_purpose::URL_SAFE};
+            hash.remove(0);
+            let comp = URL_SAFE.decode(hash).unwrap_or_default();
+            let bytes = lz4_flex::decompress_size_prepended(&comp).unwrap_or_default();
+            String::try_from(bytes).unwrap_or_default()
+        }
+    };
     #[cfg(feature = "kalc-lib")]
     let data = if args.len() > 1 && args[0] == "-d" && cfg!(feature = "bincode") {
         #[cfg(feature = "bincode")]