A pane tag wraps onto rows and can collapse to one, as acme's does

acme's frame wraps a tag at its right edge and the window grows to show
every row (wind.c wintaglines); Tagup/Tagdown shrink it to one row and back.
Pane tags used to be one row, scrolled sideways to the caret. Now a tag's
lines wrap at its width (one cell kept for the caret past a full row) and it
starts expanded; insert-mode Up on the first row collapses it, Down on the
last row expands it, and Alt-Up/Alt-Down do so in either mode. A word the
wrap breaks across rows is still one word to a click and a selection.
Column and workspace tags keep scrolling sideways.

Tests read body rows relative to the body's first row; the 41 snapshot
goldens that moved were re-recorded by name after a programmatic check that
each differs only by body rows shifting under the taller tags, and twelve
scripts whose clicks targeted fixed rows now click the same text.

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

1 files changed, 3 insertions, 2 deletions

diff --git a/src/mouse.zig b/src/mouse.zig
index 790dc9d1..beea68df 100644
--- a/src/mouse.zig
+++ b/src/mouse.zig
@@ -685,11 +685,12 @@ fn gestureRange(p: *Pardes, id: usize, text: []const u8, on_tag: bool, operand:
     const pane = p.panes[id] orelse return .{};
     if (on_tag) {
         const tag = tagline.tagText(p, p.scratch.allocator(), pane) catch return .{};
+        const shown = tagline.shownTag(p, p.scratch.allocator(), pane) catch return .{};
         const sel = operand.expanded orelse operand.preview orelse return .{};
         const lead = if (sel.r0 < sel.r1 or (sel.r0 == sel.r1 and sel.c0 <= sel.c1)) sel else Pane.Sel{ .r0 = sel.r1, .c0 = sel.c1 };
         const row: usize = @as(usize, @intCast(@max(0, lead.r0))) + pane.tag_top;
-        const start = modal.lineStartOffset(tag, row);
-        const at = start + panes.File.rawAtDisplay(modal.lineSlice(tag, row), @intCast(@max(0, lead.c0)));
+        const start = modal.lineStartOffset(shown.text, row);
+        const at = shown.toReal(start + panes.File.rawAtDisplay(modal.lineSlice(shown.text, row), @intCast(@max(0, lead.c0))));
         const q0: u32 = @intCast(@min(at, tag.len));
         return .{ .q0 = q0, .q1 = @intCast(@min(q0 + text.len, tag.len)) };
     }