A reused command pane leaves the last program's screen modes before the next command

A program that crashed out of a full screen left the command pane's emulator
in the alternate screen with mouse reports, bracketed paste or a hidden cursor
on, and the next command ran in that. Before the '% line' separator the pane
now leaves the alternate screen, turns those modes off and soft-resets
(DECSTR). The docs add that a command which clears the screen and its
scrollback erases the pane's history above it.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/pardes.zig b/src/pardes.zig
index 74554e0d..97ba534a 100644
--- a/src/pardes.zig
+++ b/src/pardes.zig
@@ -1432,8 +1432,13 @@ test "a command pane shows how its command ended, and the next command there run
     // Kill leaves a finished one be.
     try std.testing.expect(p.executeBuiltinLine(0, "Kill make"));
     while (p.nextEffect()) |effect| if (effect == .signal_pty and effect.signal_pty.pane == dst) return error.SignalledAFinishedCommand;
+    // A program that crashed out of its full screen leaves the emulator
+    // in its modes; the next command starts clear of them.
+    p.update(.{ .output = .{ .pane = @intCast(dst), .bytes = "\x1b[?1049h\x1b[?2004h\x1b[?1000h" } });
+    try std.testing.expect(panes.Terminal.bracketedPaste(pane));
     // Done, the directory's next command runs there, below what it showed.
     try std.testing.expectEqual(@as(?usize, dst), exec.execute(p, 1, "make test"));
+    try std.testing.expect(!panes.Terminal.bracketedPaste(pane));
     var respawned = false;
     while (p.nextEffect()) |effect| if (effect == .spawn and effect.spawn.pane == dst) {
         respawned = true;