Make waylands app_id and x11s class overrideable (#834)

* trying to make app_id and class exchangeable

* still fails to hand over the argument

* make both app_id and class be set by command line arguments

* added missing cfg for class

* Changes as requested. Putting the os check in a block however doesn't
work for me

* getting rid of superfluous to_string()

* x11-class argument gets ignored

* changed argument name

* Update src/cmd_line.rs

* changed faulty unwrap

* added missing comma

* fixed wrong case

* fixed class

* make cargo fmt happy

* exchanged String::from with String::new

* make both attributes also overrideable via env::var

Co-authored-by: partizan <serg.partizan@gmail.com>

src/cmd_line.rs

@@ -17,6 +17,8 @@ pub struct CmdLineSettings {
     pub multi_grid: bool,
     pub maximized: bool,
     pub frameless: bool,
+    pub wayland_app_id: String,
+    pub x11_wm_class: String,
 }
 
 impl Default for CmdLineSettings {
@@ -34,6 +36,8 @@ impl Default for CmdLineSettings {
             multi_grid: false,
             maximized: false,
             frameless: false,
+            wayland_app_id: String::new(),
+            x11_wm_class: String::new(),
         }
     }
 }
@@ -76,7 +80,11 @@ pub fn handle_command_line_arguments() -> Result<(), String> {
             .long("frameless")
             .help("Removes the window frame. NOTE: Window might not be resizable after this setting is enabled.")
         )
-        .arg(Arg::with_name("wsl").long("wsl").help("Run in WSL"))
+        .arg(
+            Arg::with_name("wsl")
+                .long("wsl")
+                .help("Run in WSL")
+        )
         .arg(
             Arg::with_name("remote_tcp")
                 .long("remote-tcp")
@@ -101,6 +109,16 @@ pub fn handle_command_line_arguments() -> Result<(), String> {
                 .takes_value(true)
                 .last(true)
                 .help("Specify Arguments to pass down to neovim"),
+        )
+        .arg(
+            Arg::with_name("wayland_app_id")
+                .long("wayland-app-id")
+                .takes_value(true)
+        )
+        .arg(
+            Arg::with_name("x11_wm_class")
+                .long("x11-wm-class")
+                .takes_value(true)
         );
 
     let matches = clapp.get_matches();
@@ -132,6 +150,20 @@ pub fn handle_command_line_arguments() -> Result<(), String> {
         wsl: matches.is_present("wsl"),
         frameless: matches.is_present("frameless") || std::env::var("NEOVIDE_FRAMELESS").is_ok(),
         geometry: parse_window_geometry(matches.value_of("geometry").map(|i| i.to_owned()))?,
+        wayland_app_id: match std::env::var("NEOVIDE_APP_ID") {
+            Ok(val) => val,
+            Err(_) => matches
+                .value_of("wayland_app_id")
+                .unwrap_or("neovide")
+                .to_string(),
+        },
+        x11_wm_class: match std::env::var("NEOVIDE_WM_CLASS") {
+            Ok(val) => val,
+            Err(_) => matches
+                .value_of("x11_wm_class")
+                .unwrap_or("neovide")
+                .to_string(),
+        },
     });
     Ok(())
 }

src/window/window_wrapper/mod.rs

@@ -222,7 +222,12 @@ pub fn start_loop(
         .with_decorations(!SETTINGS.get::<CmdLineSettings>().frameless);
 
     #[cfg(target_os = "linux")]
-    let winit_window_builder = winit_window_builder.with_app_id("Neovide".to_string());
+    let winit_window_builder = winit_window_builder
+        .with_app_id(SETTINGS.get::<CmdLineSettings>().wayland_app_id)
+        .with_class(
+            "neovide".to_string(),
+            SETTINGS.get::<CmdLineSettings>().x11_wm_class,
+        );
 
     let windowed_context = ContextBuilder::new()
         .with_pixel_format(24, 8)