use filename for window title

src/main.rs

@@ -1,6 +1,7 @@
 use std::fs::File;
-use std::io::BufReader;
+use std::io::{BufReader, Read};
 use std::num::NonZeroU32;
+use std::path::Path;
 use std::rc::Rc;
 use std::{env, time::*};
 
@@ -19,6 +20,8 @@ use softbuffer::Surface;
 
 #[derive(Default)]
 struct App {
+    file_name: String,
+
     window: Option<Rc<Window>>,
     surface: Option<Surface<OwnedDisplayHandle, Rc<Window>>>,
     image: RgbaImage,
@@ -37,7 +40,8 @@ struct Animation {
 
 impl ApplicationHandler for App {
     fn resumed(&mut self, event_loop: &ActiveEventLoop) {
-        let window_attributes = Window::default_attributes().with_title("A fantastic window!");
+        let window_attributes =
+            Window::default_attributes().with_title(format!("sivi - {}", self.file_name));
         let window = Rc::new(event_loop.create_window(window_attributes).unwrap());
         let context = softbuffer::Context::new(event_loop.owned_display_handle()).unwrap();
         let surface = Surface::new(&context, window.clone()).unwrap();
@@ -164,9 +168,19 @@ fn main() -> anyhow::Result<()> {
         return Ok(());
     };
 
+    let file_path = Path::new(args[1].as_str());
+
+    if !file_path.is_file() {
+        println!("The argument provided is not a file path!\n");
+        return Ok(());
+    }
+
     let mut app = App::default();
-    let image = ImageReader::open(args[1].clone())
-        .context(format!("Failed to open image at {}", args[1]))?;
+    let image =
+        ImageReader::open(file_path).context(format!("Failed to open image at {}", args[1]))?;
+
+    app.file_name = file_path.file_name().unwrap().to_str().unwrap().to_string();
+
     match image.format().unwrap() {
         ImageFormat::Gif => {
             let mut animation = Animation::default();