Implementation of the XTSMGRAPHICS sequence.

1 files changed, 31 insertions, 0 deletions

diff --git a/alacritty_terminal/src/term/mod.rs b/alacritty_terminal/src/term/mod.rs
index 1e87ec8a..63a2e282 100644
--- a/alacritty_terminal/src/term/mod.rs
+++ b/alacritty_terminal/src/term/mod.rs
@@ -1771,6 +1771,37 @@ impl<T: EventListener> Handler for Term<T> {
         self.event_proxy.send_event(Event::PtyWrite(text));
     }
 
+    #[inline]
+    fn graphics_attribute<W: io::Write>(&mut self, writer: &mut W, pi: u16, pa: u16) {
+        // From Xterm documentation:
+        //
+        //   Pi = 1  -> item is number of color registers.
+        //   Pi = 2  -> item is Sixel graphics geometry (in pixels).
+        //
+        //   Pa = 1  -> read attribute.
+        //   Pa = 4  -> read the maximum allowed value.
+        //
+        // Any other request reports an error.
+
+        let (ps, pv) = if pa == 1 || pa == 4 {
+            match pi {
+                1 => (0, &[sixel::MAX_COLOR_REGISTERS][..]),
+                2 => (0, &[MAX_GRAPHIC_DIMENSIONS.0, MAX_GRAPHIC_DIMENSIONS.1][..]),
+                _ => (1, &[][..]), // Report error in Pi
+            }
+        } else {
+            (2, &[][..]) // Report error in Pa
+        };
+
+        let _ = write!(writer, "\x1b[?{};{}", pi, ps);
+
+        for item in pv {
+            let _ = write!(writer, ";{}", item);
+        }
+
+        let _ = write!(writer, "S");
+    }
+
     fn start_sixel_graphic(&mut self, params: &Params) -> Option<Box<sixel::Parser>> {
         let palette = self.graphics.sixel_shared_palette.take();
         Some(Box::new(sixel::Parser::new(params, palette)))