figure out how to add signal callbacks

Cargo.lock

@@ -1,3 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
 [[package]]
 name = "aho-corasick"
 version = "0.6.9"

src/lib.rs

@@ -1,8 +1,38 @@
 use c_str_macro::c_str;
 use shenlong_sys::*;
+use std::ffi::CStr;
+use std::ptr;
+use std::mem::transmute;
 
 extern "C" fn shenlong_init(plugin: *mut GeanyPlugin, pdata: gpointer) -> gboolean {
     println!("shenlong init");
+
+    unsafe {
+        plugin_signal_connect(
+            plugin,
+            ptr::null_mut(),
+            c_str!("document-open").to_owned().as_ptr(),
+            0,
+            Some(transmute(shenlong_document_open as usize)),
+            ptr::null_mut()
+        );
+        plugin_signal_connect(
+            plugin,
+            ptr::null_mut(),
+            c_str!("document-new").to_owned().as_ptr(),
+            0,
+            Some(transmute(shenlong_document_new as usize)),
+            ptr::null_mut()
+        );
+        plugin_signal_connect(
+            plugin,
+            ptr::null_mut(),
+            c_str!("document-save").to_owned().as_ptr(),
+            0,
+            Some(transmute(shenlong_document_save as usize)),
+            ptr::null_mut()
+        );
+    }
     1
 }
 
@@ -10,6 +40,26 @@ extern "C" fn shenlong_cleanup(plugin: *mut GeanyPlugin, pdata: gpointer) {
     println!("shenlong cleanup");
 }
 
+extern "C" fn shenlong_document_open(obj: *mut GObject, doc: *mut GeanyDocument, user_data: gpointer) {
+    unsafe {
+        println!("shenlong document open: {:?}", CStr::from_ptr((*doc).real_path).to_str());
+    }
+}
+
+extern "C" fn shenlong_document_new(obj: *mut GObject, doc: *mut GeanyDocument, user_data: gpointer) {
+    println!("shenlong document new");
+}
+
+extern "C" fn shenlong_document_save(obj: *mut GObject, doc: *mut GeanyDocument, user_data: gpointer) {
+    unsafe {
+        println!("shenlong document save: {:?}", CStr::from_ptr((*doc).real_path).to_str());
+    }
+}
+
+extern "C" fn shenlong_empty_callback() {
+    println!("shenlong empty callback");
+}
+
 #[no_mangle]
 pub extern "C" fn geany_load_module(plugin: *mut GeanyPlugin) {
     println!("loading shenlong module");
@@ -23,7 +73,53 @@ pub extern "C" fn geany_load_module(plugin: *mut GeanyPlugin) {
         let mut plugin_funcs = &mut *(*plugin).funcs;
         plugin_funcs.init = Some(shenlong_init);
         plugin_funcs.cleanup = Some(shenlong_cleanup);
+        
+        /*let mut plugin_callbacks: [PluginCallback; 6] = [
+            PluginCallback { 
+                signal_name: c_str!("document-open").to_owned().into_raw(),
+                callback: Some(transmute(shenlong_document_open as usize)),
+                //callback: Some(shenlong_empty_callback),
+                after: 0,
+                user_data: ptr::null_mut()
+            },
+            PluginCallback { 
+                signal_name: c_str!("document-new").to_owned().into_raw(),
+                //callback: Some(transmute(shenlong_document_new as usize)),
+                callback: Some(shenlong_empty_callback),
+                after: 0,
+                user_data: ptr::null_mut()
+            },
+            PluginCallback { 
+                signal_name: c_str!("document-close").to_owned().into_raw(),
+                //callback: Some(transmute(shenlong_document_new as usize)),
+                callback: Some(shenlong_empty_callback),
+                after: 0,
+                user_data: ptr::null_mut()
+            },
+            PluginCallback { 
+                signal_name: c_str!("document-save").to_owned().into_raw(),
+                //callback: Some(transmute(shenlong_document_save as usize)),
+                callback: Some(shenlong_empty_callback),
+                after: 0,
+                user_data: ptr::null_mut()
+            },
+            PluginCallback { 
+                signal_name: c_str!("document-reload").to_owned().into_raw(),
+                //callback: Some(transmute(shenlong_document_new as usize)),
+                callback: Some(shenlong_empty_callback),
+                after: 0,
+                user_data: ptr::null_mut()
+            },
+            PluginCallback { 
+                signal_name: ptr::null(),
+                callback: None,
+                after: 0,
+                user_data: ptr::null_mut()
+            }
+        ];
+        plugin_funcs.callbacks = plugin_callbacks.as_mut_ptr();*/
 
         geany_plugin_register(plugin, 235, GEANY_API_VERSION as i32, GEANY_ABI_VERSION as i32);
     }
+    println!("... shenlong module loaded");
 }