:N on a PDF turns to page N, from the pane and from the root's look; @pN:N answers ok with no err; an address in a pane with no text names the pane

A PDF pane took :N as a word to search for, and @p<pdf>:N failed as
"is no text to address" after the page had nothing to do with it, an
err in the log for a look that meant something. A PDF's address is now
its page: :N turns to it, one past the last is the has-no-page miss,
and a byte offset or a pattern is refused saying a PDF's address is a
page. The refusal for any other textless pane named an empty path when
the look was a bare :addr; it names the image or @p<serial> now.

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

1 files changed, 10 insertions, 0 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index 4aa38292..a14b1efb 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -1671,6 +1671,16 @@ test "Save path of a file pane logs a save record naming that path" {
     try testing.expect(th.logHas(p, try std.fmt.bufPrint(&want, "save {d} /tmp/pardes-save-copy.txt\n", .{serial})));
 }
 
+test "an address looked at in an image pane names the image, never an empty subject" {
+    const p = try withFile(testing.allocator, "x\n");
+    defer p.deinit();
+    const id = p.freeSlot().?;
+    const doc = try p.newDocPane(id);
+    doc.image = .{ .path = try p.gpa.dupe(u8, "/tmp/pardes-pic.ppm") };
+    _ = wr(p, Node.of(doc.serial, .look), ":/x/\n");
+    try testing.expect(th.logHas(p, "look: /tmp/pardes-pic.ppm is no text to address"));
+}
+
 test "Save and Save path on an image pane are refused with why, never a silent success" {
     const p = try withFile(testing.allocator, "x\n");
     defer p.deinit();