use callbacks for events rather than tracking counters

1 files changed, 13 insertions, 0 deletions

diff --git a/src/callbacks.rs b/src/callbacks.rs
new file mode 100644
index 0000000..256eb58
--- /dev/null
+++ b/src/callbacks.rs
@@ -0,0 +1,13 @@
+/// This trait is used with `Parser::process_cb` to handle extra escape
+/// sequences that don't have an impact on the terminal screen directly.
+pub trait Callbacks {
+    /// This callback is called when the terminal requests an audible bell
+    /// (typically with `^G`).
+    fn audible_bell(&mut self, _: &mut crate::Screen) {}
+    /// This callback is called when the terminal requests an visual bell
+    /// (typically with `\eg`).
+    fn visual_bell(&mut self, _: &mut crate::Screen) {}
+    /// This callback is called when the terminal receives invalid input
+    /// (such as an invalid UTF-8 character or an used control character).
+    fn error(&mut self, _: &mut crate::Screen) {}
+}