Let a pane's tag take a row for each line it holds

A tag that is a text can hold a newline, and the tagline, the body under it
and the pointer all assumed one row. The pane's tag now takes a row per line
(up to eight, and never the body's last row); the body starts below it, the
rows a pointer counts start the body after the tag's lines, a click on any
line puts the tag's cursor there, and a pixel shell gets a tag layer per
line. A tag of one line draws exactly as before.

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

1 files changed, 4 insertions, 4 deletions

diff --git a/src/Messages.zig b/src/Messages.zig
index 053950da..c7ff09be 100644
--- a/src/Messages.zig
+++ b/src/Messages.zig
@@ -397,7 +397,7 @@ pub fn reportError(p: *Pardes, id: usize, operation: []const u8, err: anyerror)
 /// them instead of letting the last one win the row.
 pub fn collectNotices(p: *Pardes, pane: *Pane, r: Rect, id: usize) void {
     pane.notices.len = 0;
-    if (r.w <= config.GUTTER or r.h <= BOX_H) return;
+    if (r.w <= config.GUTTER or r.h <= pane.tag_rows) return;
     // Oldest message line on top, so lines already up do not move when a
     // new one lands under them; when rows run out the oldest go first.
     for (pane.msg_older[0..pane.msg_older_len], 0..) |line, i| pane.notices.pushAt(.older, @intCast(i), line.slot);
@@ -409,7 +409,7 @@ pub fn collectNotices(p: *Pardes, pane: *Pane, r: Rect, id: usize) void {
     // carrying the cursor: a prompt you cannot see is a prompt you type
     // into blind. A two-row pane spends its only body row on one notice,
     // which is what the single shared row used to do anyway.
-    const room: u8 = @intCast(@min(@as(u16, Pane.Notices.max), r.h - BOX_H));
+    const room: u8 = @intCast(@min(@as(u16, Pane.Notices.max), r.h - pane.tag_rows));
     const n = &pane.notices;
     if (n.span() <= room) return;
     // Too short for the gaps: close them up in screen order, and if even
@@ -743,7 +743,7 @@ test "notices stack over the body's top rows without moving them" {
     defer frame.deinit();
 
     const r = p.rects[id];
-    const top = p.bodyTop(r);
+    const top = p.bodyTop(pane, r);
 
     // A message and a leader prefix at once: two chips, in the order
     // collectNotices chose, each one row tall and each one row further down.
@@ -754,7 +754,7 @@ test "notices stack over the body's top rows without moving them" {
     _ = try p.render(frame.allocator());
     try std.testing.expectEqual(@as(u8, 2), pane.notices.len);
     // An overlay, not a reservation: the body still starts where it did.
-    try std.testing.expectEqual(top, p.bodyTop(r));
+    try std.testing.expectEqual(top, p.bodyTop(pane, r));
 
     var seen: usize = 0;
     for (p.surface.tagLayers()) |*layer| {