From 2d007737eb6f7f8e48bf6500e19ed44e62df5aa7 Mon Sep 17 00:00:00 2001
From: Gabriel Schneider <gbrls@0x4200.cafe>
Date: Tue, 29 Sep 2026 17:18:36 -0300
Subject: The terminal's capabilities are taken up when its answer comes, not
 at the first key after it

---
 src/tty/tty.zig | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/tty')

diff --git a/src/tty/tty.zig b/src/tty/tty.zig
index 97c720ea..efccd98e 100644
--- a/src/tty/tty.zig
+++ b/src/tty/tty.zig
@@ -178,6 +178,13 @@ fn readInput(loop: *Loop, tty: anytype, cache: *vaxis.GraphemeCache) !void {
                     if (event == .paste) if (loop.vaxis.opts.system_clipboard_allocator) |gpa| gpa.free(@constCast(event.paste));
                     return err;
                 };
+            // The last answer to the startup queries is no event of its
+            // own: wake the loop so it takes the capabilities up (pollFrame)
+            // now. Left to the first key, that key paid for the full redraw
+            // they cost, and kitty's keys came in the legacy way till then.
+            if (result.event) |event| if (event == .cap_da1) {
+                _ = loop.tryPostEvent(.nop) catch {};
+            };
         }
         carried = end - consumed;
         std.mem.copyForwards(u8, buf[0..carried], buf[consumed..end]);
@@ -276,6 +283,8 @@ test "terminal input preserves fragmented keys queries paste and text after EOF"
             try std.testing.expectEqualStrings("clip", bytes);
             clipboard = true;
         },
+        // The device attributes' wake (a capability answer).
+        .nop => try std.testing.expect(vx.queries_done.load(.unordered)),
         else => return error.UnexpectedInputEvent,
     };
     try std.testing.expectEqualStrings("plain café 界 😀tail", text.items);
@@ -358,6 +367,7 @@ test "terminal replies and malformed sequences never become typed text" {
             try std.testing.expectEqual(@as(i16, 0), mouse.col);
             clicked = true;
         },
+        .nop => {}, // the device attributes' wake
         else => return error.UnexpectedInputEvent,
     };
     try std.testing.expectEqualStrings("abc", text.items);
@@ -1420,6 +1430,7 @@ const Shell = struct {
             s.core.native_images = s.vx.caps.kitty_graphics;
             if (s.vx.caps.kitty_graphics) kittyShmProbe(s.tty.writer());
             s.vx.queueRefresh();
+            s.core.needs_frame = true;
         }
     }
 
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