Merge pull request #6 from firefly-zero/menu

Menu

Author: orsinium

src/lib.rs

@@ -11,6 +11,7 @@ mod fs;
 pub mod graphics;
 mod input;
 pub mod math;
+mod menu;
 mod misc;
 mod net;
 pub mod shapes;
@@ -20,6 +21,7 @@ pub mod sudo;
 pub use fs::*;
 pub use graphics::*;
 pub use input::*;
+pub use menu::*;
 pub use misc::*;
 pub use net::*;
 

src/menu.rs

@@ -0,0 +1,38 @@
+/// Add a custom item on the app menu.
+///
+/// The `i` index is the value passed into the `handle_menu` callback
+/// when the menu item is selected by the user.
+/// Its value doesn't have to be unique or continious.
+pub fn add_menu_item(i: u8, t: &str) {
+    let ptr = t.as_ptr() as u32;
+    let len = t.len() as u32;
+    unsafe {
+        bindings::add_menu_item(i as u32, ptr, len);
+    }
+}
+
+/// Remove a custom menu item with the given index.
+pub fn remove_menu_item(i: u8) {
+    unsafe {
+        bindings::remove_menu_item(i as u32);
+    }
+}
+
+/// Open the app menu.
+///
+/// It will be opened before the next update.
+/// The current update and then render will proceed as planned.
+pub fn open_menu() {
+    unsafe {
+        bindings::open_menu();
+    }
+}
+
+mod bindings {
+    #[link(wasm_import_module = "menu")]
+    extern {
+        pub(crate) fn add_menu_item(index: u32, text_ptr: u32, text_len: u32);
+        pub(crate) fn remove_menu_item(index: u32);
+        pub(crate) fn open_menu();
+    }
+}