deleting

src/edit_action.rs

@@ -0,0 +1,29 @@
+use std::cmp::min;
+use crate::{app::App, cursor::Cursor};
+
+pub enum EditAction {
+	Delete {
+		cursor: Cursor,
+		data: Vec<u8>
+	}
+}
+
+impl App {
+	pub fn execute_and_add(&mut self, edit_action: EditAction) {
+		self.execute_edit(&edit_action);
+		self.edit_history.push(edit_action);
+	}
+	
+	fn execute_edit(&mut self, edit_action: &EditAction) {
+		match edit_action {
+			EditAction::Delete { cursor, .. } => self.delete_at(*cursor),
+		}
+	}
+	
+	fn delete_at(&mut self, cursor: Cursor) {
+		self.contents.drain(cursor.range());
+		
+		self.cursor.head = min(cursor.head, cursor.tail);
+		self.cursor.collapse();
+	}
+}