Added Backspace Support

src/interrupts.rs

@@ -72,8 +72,15 @@ extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: InterruptStac
     if let Ok(Some(key_event)) = keyboard.add_byte(scancode) {
         if let Some(key) = keyboard.process_keyevent(key_event) {
             match key {
-                DecodedKey::Unicode(character) => print!("{}", character),
-                DecodedKey::RawKey(key) => print!("{:?}", key),
+                DecodedKey::Unicode(character) => match character {
+                    '\x08' => {
+                        use crate::vga_buffer::WRITER;
+                        WRITER.lock().backspace();
+                    }
+                    _ => print!("{}", character),
+                },
+                //DecodedKey::RawKey(key) => print!("{:?}", key),
+                DecodedKey::RawKey(_) => {} // ignoring raw keys
             }
         }
     }

src/vga_buffer.rs

@@ -109,6 +109,14 @@ impl Writer {
             }
         }
     }
+
+    pub fn backspace(&mut self) {
+        if self.column_position > 0 {
+            self.column_position -= 1;
+            self.write_byte(b' ');
+            self.column_position -= 1;
+        }
+    }
 }
 
 impl fmt::Write for Writer {