Support HVP cursor positioning

examples/generate_fixture.rs

@@ -14,9 +14,8 @@ fn main() {
             .unwrap();
     let inputs = std::io::BufReader::new(inputs);
 
-    let mut i = 1;
     let mut prev_input = vec![];
-    for line in inputs.lines() {
+    for (i, line) in (1..).zip(inputs.lines()) {
         let line = line.unwrap();
 
         let input = helpers::unhex(line.as_bytes());
@@ -36,7 +35,5 @@ fn main() {
         ))
         .unwrap();
         serde_json::to_writer_pretty(output_file, &screen).unwrap();
-
-        i += 1;
     }
 }

src/perform.rs

@@ -110,7 +110,9 @@ impl<CB: crate::callbacks::Callbacks> vte::Perform for WrappedScreen<CB> {
                 'E' => self.screen.cnl(canonicalize_params_1(params, 1)),
                 'F' => self.screen.cpl(canonicalize_params_1(params, 1)),
                 'G' => self.screen.cha(canonicalize_params_1(params, 1)),
-                'H' => self.screen.cup(canonicalize_params_2(params, 1, 1)),
+                'H' | 'f' => {
+                    self.screen.cup(canonicalize_params_2(params, 1, 1));
+                }
                 'J' => self
                     .screen
                     .ed(canonicalize_params_1(params, 0), unhandled),

tests/csi.rs

@@ -5,6 +5,18 @@ fn absolute_movement() {
     helpers::fixture("absolute_movement");
 }
 
+#[test]
+fn horizontal_vertical_position() {
+    let mut vt = vt100::Parser::new(5, 10, 0);
+
+    vt.process(b"\x1b[3;7fX");
+    assert_eq!(vt.screen().cell(2, 6).unwrap().contents(), "X");
+    assert_eq!(vt.screen().cursor_position(), (2, 7));
+
+    vt.process(b"\x1b[fY");
+    assert_eq!(vt.screen().cell(0, 0).unwrap().contents(), "Y");
+}
+
 #[test]
 fn row_clamp() {
     let mut vt = vt100::Parser::default();