A command run from a column's tag gets its pane in that column

A command from a column's tag ran in a command pane at the foot of the
last column, however far from the tag, and could reuse a finished one
anywhere. It now goes to the tag's column, under both placements, and
reuses only a finished command pane in that column.

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

1 files changed, 19 insertions, 0 deletions

diff --git a/src/ninep/cols.zig b/src/ninep/cols.zig
index c55c1e73..ef2e6cbd 100644
--- a/src/ninep/cols.zig
+++ b/src/ninep/cols.zig
@@ -337,3 +337,22 @@ test "a word run from the workspace's or a column's tag runs in the session's di
     const made = p.paneBySerial(p.fs.results[0]).?;
     try testing.expectEqualStrings(pardes.Pardes.paneDir(p.panes[0].?), pardes.Pardes.paneDir(p.panes[made].?));
 }
+
+test "a command run from a column's tag gets its pane in that column, not the last" {
+    const p = try th.withFile(testing.allocator, "x\n");
+    defer p.deinit();
+    p.newColumn(p.active);
+    p.newScratchFor(p.active, .fs); // fills the new, right column
+    p.sync();
+    const left = layout.columnSerial(p, 0);
+    try testing.expectEqual(tree.Status.ok, th.wr(p, Node.ofCol(left, .exec), "true\n").reply.status);
+    const made = p.paneBySerial(p.fs.results[0]).?;
+    try testing.expectEqual(@as(usize, 0), layout.findPane(p, made).?.col);
+    // Finished, it is reused only by its own column's commands.
+    p.panes[made].?.command_done = true;
+    p.panes[made].?.command_pty = false;
+    try testing.expectEqual(tree.Status.ok, th.wr(p, Node.ofCol(layout.columnSerial(p, 1), .exec), "true\n").reply.status);
+    const other = p.paneBySerial(p.fs.results[0]).?;
+    try testing.expect(other != made);
+    try testing.expectEqual(@as(usize, 1), layout.findPane(p, other).?.col);
+}