submission: Create a new wrapper over imservice

src/submission.rs

@@ -20,3 +20,65 @@
 /// Temporary reexport to keep stuff based directly on virtual-keyboard working
 /// until a unified handler appears and prompts a rework.
 pub use vkeyboard::*;
+
+use ::imservice::IMService;
+
+/// Gathers stuff defined in C or called by C
+pub mod c {
+    use super::*;
+    
+    use std::os::raw::c_void;
+
+    use ::imservice::c::InputMethod;
+
+    // The following defined in C
+
+    /// ServerContextService*
+    #[repr(transparent)]
+    pub struct UIManager(*const c_void);
+
+    /// EekboardContextService*
+    #[repr(transparent)]
+    pub struct StateManager(*const c_void);
+
+    #[no_mangle]
+    pub extern "C"
+    fn submission_new(
+        im: *mut InputMethod,
+        state_manager: *const StateManager
+    ) -> *mut Submission {
+        let imservice = if im.is_null() {
+            None
+        } else {
+            Some(IMService::new(im, state_manager))
+        };
+        // TODO: add vkeyboard too
+        Box::<Submission>::into_raw(Box::new(
+            Submission {
+                imservice,
+            }
+        ))
+    }
+
+    #[no_mangle]
+    pub extern "C"
+    fn submission_set_ui(submission: *mut Submission, ui_manager: *const UIManager) {
+        if submission.is_null() {
+            panic!("Null submission pointer");
+        }
+        let submission: &mut Submission = unsafe { &mut *submission };
+        if let Some(ref mut imservice) = &mut submission.imservice {
+            imservice.ui_manager = if ui_manager.is_null() {
+                None
+            } else {
+                Some(ui_manager)
+            }
+        };
+    }
+}
+
+pub struct Submission {
+    // used by C callbacks internally, TODO: make use with virtual keyboard
+    #[allow(dead_code)]
+    imservice: Option<Box<IMService>>,
+}