no idea what am doing

adamperkowski · Oct 23, 2024 · 269f258 · 269f258
1 parent d45ea97
commit 269f258
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Showing 2 changed files with 18 additions and 6 deletions.
diff --git a/kernel/src/interrupts.rs b/kernel/src/interrupts.rs
@@ -182,15 +182,24 @@ extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: InterruptStac
                         }
 
                         KeyCode::ArrowLeft => {
-                            // TODO #29: Limits & newlines
-                            #[cfg(debug_assertions)]
-                            WRITER.lock().decrement_column_position();
+                            if unsafe { BUFFER_INDEX } > 0 {
+                                WRITER.lock().decrement_column_position();
+
+                                /* unsafe {
+                                    BUFFER_INDEX -= 1;
+                                }
+
+                                print!(" ");
+                                WRITER.lock().decrement_column_position(); */
+                            }
                         }
 
                         KeyCode::ArrowRight => {
-                            // TODO #29: Limits & newlines
-                            #[cfg(debug_assertions)]
-                            WRITER.lock().increment_column_position();
+                            let mut writer = WRITER.lock();
+
+                            if writer.get_column_position() < unsafe { BUFFER_INDEX } {
+                                writer.increment_column_position();
+                            }
                         }
 
                         _ => {}

diff --git a/kernel/src/vga_buffer.rs b/kernel/src/vga_buffer.rs
@@ -208,6 +208,9 @@ impl Writer {
     pub fn increment_column_position(&mut self) {
         self.column_position += 1;
     }
+    pub fn get_column_position(&mut self) -> usize {
+        self.column_position
+    }
 }
 
 impl fmt::Write for Writer {