Find and Grep share one +Search a directory, each run replacing the last

Each Grep with a new pattern opened another +Search, until the column
refused panes. Find and Grep now reuse their directory's one, as acme
reuses +Errors, and the exec reads back the pane it filled; a plain
word's LookWord list search keeps a pane a pattern as before.

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

1 files changed, 8 insertions, 1 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index a474c781..fbda6113 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -73,6 +73,7 @@ pub fn run(p: *Pardes, id: usize, exec: bool, text: []const u8, in_tag: bool) vo
     // An exec answers the pane it went to: a command pane it reused, or
     // the terminal it typed into.
     p.look_missed = false;
+    p.fs.refilled = null;
     const went: ?usize = if (exec) pardes.exec.execute(p, id, text) else blk: {
         look.lookAt(p, id, text);
         break :blk null;
@@ -88,6 +89,9 @@ pub fn run(p: *Pardes, id: usize, exec: bool, text: []const u8, in_tag: bool) vo
         created = true;
     };
     if (created) return;
+    // A +Search it filled again (Find and Grep reuse one): that is what it
+    // touched.
+    if (p.fs.refilled) |serial| if (p.paneBySerial(serial) != null) return noteResult(p, serial);
     if (went) |dst| if (p.panes[dst]) |pane| return noteResult(p, pane.serial);
     noteResult(p, if (exec) context else (p.panes[p.active] orelse return).serial);
 }
@@ -1841,7 +1845,8 @@ test "Grep with no hit says grep: no match and opens nothing, a missing pane dir
     const dir = dir_buf[0..try tmp.dir.realPath(testing.io, &dir_buf)];
     var line: [4200]u8 = undefined;
     _ = wr(p, Node.of(serialOf(p), .name), try std.fmt.bufPrint(&line, "{s}/a.txt\n", .{dir}));
-    // A hit opens its +Search, a row a line: exec reads it back.
+    // A hit opens its +Search, a row a line: exec reads it back. Find and
+    // Grep share it, a directory's one +Search, each run replacing it.
     try testing.expectEqual(Status.ok, wr(p, Node.of(serialOf(p), .exec), "Grep bravo\n").reply.status);
     const grepped = p.panes[p.paneBySerial(try std.fmt.parseInt(u32, std.mem.trimEnd(u8, rd(p, root_exec, 0, 64).bytes, "\n"), 10)).?].?;
     try testing.expectEqual(@as(usize, 2), std.mem.count(u8, grepped.file.?.content, "other.txt:"));
@@ -1850,6 +1855,8 @@ test "Grep with no hit says grep: no match and opens nothing, a missing pane dir
     try testing.expectEqual(Status.ok, wr(p, Node.of(serialOf(p), .exec), "Find other\n").reply.status);
     const found = p.panes[p.paneBySerial(try std.fmt.parseInt(u32, std.mem.trimEnd(u8, rd(p, root_exec, 0, 64).bytes, "\n"), 10)).?].?;
     try testing.expect(std.mem.indexOf(u8, found.file.?.content, "other.txt") != null);
+    try testing.expectEqual(grepped.serial, found.serial);
+    try testing.expect(std.mem.indexOf(u8, found.file.?.content, "bravo here") == null);
     // A second pane in a directory that is not there.
     const other = try th.newPane(p);
     _ = wr(p, Node.of(other, .name), "/tmp/pardes-no-such-dir-zz/b.txt\n");