Add key logging facility

src/input.rs

@@ -13,6 +13,8 @@ pub fn keyval_to_input_string(in_str: &str, in_state: gdk::ModifierType) -> Stri
     let mut state = in_state;
     let mut input = String::new();
 
+    debug!("keyval -> {}", in_str);
+
     // CTRL-^ and CTRL-@ don't work in the normal way.
     if state.contains(gdk::CONTROL_MASK) && !state.contains(gdk::SHIFT_MASK) &&
        !state.contains(gdk::MOD1_MASK) {

src/main.rs

@@ -9,6 +9,9 @@ extern crate pango;
 extern crate pangocairo;
 extern crate neovim_lib;
 extern crate phf;
+#[macro_use] 
+extern crate log;
+extern crate env_logger;
 
 mod ui_model;
 #[macro_use]
@@ -30,6 +33,8 @@ use ui::SH;
 const BIN_PATH_ARG: &'static str = "--nvim-bin-path";
 
 fn main() {
+    env_logger::init().expect("Can't initialize env_logger");
+
     let app = gtk::Application::new(Some("org.daa.NeovimGtk"), gio::ApplicationFlags::empty())
         .expect("Failed to initialize GTK application");
 

src/shell.rs

@@ -246,6 +246,7 @@ fn gtk_motion_notify(_: &DrawingArea, ev: &EventMotion) -> Inhibit {
 fn gtk_key_press(_: &DrawingArea, ev: &EventKey) -> Inhibit {
     if let Some(input) = convert_key(ev) {
         SHELL!(shell = {
+            debug!("nvim_input -> {}", input);
             shell.nvim().input(&input).expect("Error run input command to nvim");
             shell.cursor.reset_state();
         });