Add buffer delete command

src/core/prompt.rs

@@ -62,6 +62,11 @@ impl Editor {
                 self.buffers.switch_to(new_buffer_index);
                 self.redraw_task = RedrawTask::Full;
             },
+            "bd" => {
+                let ix = self.buffers.current_buffer_index();
+                self.buffers.delete_buffer(ix);
+                self.redraw_task = RedrawTask::Full;
+            },
             "help" => {
                 self.open("/apps/sodium/help.txt");
             },

src/state/editor.rs

@@ -89,6 +89,11 @@ impl BufferManager {
         self.buffers.len()
     }
 
+    /// Gets the index of the current buffer.
+    pub fn current_buffer_index(&self) -> usize {
+        self.current_buffer_index
+    }
+
     /// Get a reference to the currently open buffer.
     pub fn current_buffer(&self) -> &SplitBuffer {
         &self.current_buffer_info().raw_buffer