1 files changed, 42 insertions, 3 deletions

diff --git a/src/command.rs b/src/command.rs
index 064d767..d80f1f2 100644
--- a/src/command.rs
+++ b/src/command.rs
@@ -22,11 +22,11 @@ impl CommandBox {
         }
     }
 
-    fn cursor_end(&mut self) {
+    pub fn cursor_end(&mut self) {
         self.cursor = self.text.len();
     }
 
-    fn cursor_start(&mut self) {
+    pub fn cursor_start(&mut self) {
         self.cursor = 0;
     }
 
@@ -47,8 +47,17 @@ impl CommandBox {
         }
     }
 
+    pub fn delete_to_end(&mut self) {
+        self.text.truncate(self.cursor);
+    }
+
+    pub fn delete_to_start(&mut self) {
+        self.text = self.text.chars().skip(self.cursor).collect();
+        self.cursor = 0;
+    }
+
     pub fn push_str(&mut self, v: &str) {
-        self.text.push_str(v);
+        self.text.insert_str(self.cursor, v);
         self.cursor += v.len();
     }
 
@@ -143,6 +152,36 @@ mod command_tests {
     }
 
     #[test]
+    fn entering_text_between() {
+        let mut cmd = setup_with("save as file.png");
+        cmd.backward();
+        cmd.backward();
+        cmd.backward();
+        cmd.push_str("ext");
+        assert_eq!(&cmd.text, "save as file.extpng");
+    }
+
+    #[test]
+    fn delete_to_end() {
+        let mut cmd = setup_with("save as file.png");
+        cmd.backward();
+        cmd.backward();
+        cmd.backward();
+        cmd.delete_to_end();
+        assert_eq!(&cmd.text, "save as file.");
+    }
+
+    #[test]
+    fn delete_to_start() {
+        let mut cmd = setup_with("save as file.png");
+        cmd.backward();
+        cmd.backward();
+        cmd.backward();
+        cmd.delete_to_start();
+        assert_eq!(&cmd.text, "png");
+    }
+
+    #[test]
     fn backspacing_from_end() {
         let mut cmd = setup_with("save");
         cmd.backspace();