Store/restore emigui memory state (window positions, sizes etc)

emigui_wasm/src/lib.rs

@@ -37,3 +37,30 @@ pub fn local_storage_set(key: &str, value: &str) {
 pub fn local_storage_remove(key: &str) {
     local_storage().map(|storage| storage.remove_item(key));
 }
+
+pub fn load_memory(ctx: &emigui::Context) {
+    if let Some(memory_string) = local_storage_get("emigui_memory_json") {
+        match serde_json::from_str(&memory_string) {
+            Ok(memory) => {
+                *ctx.memory() = memory;
+            }
+            Err(err) => {
+                console_log(format!("ERROR: Failed to parse memory json: {}", err));
+            }
+        }
+    }
+}
+
+pub fn save_memory(ctx: &emigui::Context) {
+    match serde_json::to_string(&*ctx.memory()) {
+        Ok(json) => {
+            local_storage_set("emigui_memory_json", &json);
+        }
+        Err(err) => {
+            console_log(format!(
+                "ERROR: Failed to seriealize memory as json: {}",
+                err
+            ));
+        }
+    }
+}