Make a pane's tag a Text edited with the body's own keys

The tag was a fixed buffer with its own one-line editor, a cursor measured
across the path, and a hijack of the body's mode while it was typed into.
It is now the pane's second Text: its own characters after the computed
prefix (path, dirty marker, PDF page), which is never stored in it, so a
rename or a dirty marker never moves its cursor. Normal and insert mode are
the body's, undo included; `:` moves the keyboard between body and tag, the
tag remembers its cursor and starts on Save, and executing a word from it
hands the keyboard back. The mouse still sees the prefix: a sweep selects
across it and a click on the path drafts a new name.

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

1 files changed, 9 insertions, 11 deletions

diff --git a/src/normal.zig b/src/normal.zig
index a77f27a7..e4fa075d 100644
--- a/src/normal.zig
+++ b/src/normal.zig
@@ -257,7 +257,7 @@ pub fn replaySels(p: *Pardes, t: *Text, what: Replay) void {
     if (p.multi_stop) {
         p.multi_stop = false;
         const pn = p.panes[id] orelse return;
-        if (pn.serial == serial) pn.body.nsel = 0;
+        if (pn.serial == serial) t.nsel = 0;
         return;
     }
     const text = edit.flatSurface(p, t) catch return;
@@ -285,7 +285,7 @@ pub fn handleNormal(p: *Pardes, t: *Text, key: Key) void {
 
 fn executeNormalAction(p: *Pardes, t: *Text, semantic: modal.Normal.Action) void {
     const pane = t.pane();
-    const raw_selection = pane.rawPointerText(pane.sel[sel_slot]) != null;
+    const raw_selection = t.what == .body and pane.rawPointerText(pane.sel[sel_slot]) != null;
     const before = .{ t.cur_row, t.cur_col, t.vsel, t.msel, t.select, t.nsel, t.mode };
     defer if (raw_selection and !std.meta.eql(before, .{ t.cur_row, t.cur_col, t.vsel, t.msel, t.select, t.nsel, t.mode })) {
         pane.clearPointerSelection(sel_slot);
@@ -334,7 +334,7 @@ fn executeNormalAction(p: *Pardes, t: *Text, semantic: modal.Normal.Action) void
             .view_center => return t.gotoWindow(text, range, .center, go.count),
             .view_bottom => return t.gotoWindow(text, range, .bottom, go.count),
         },
-        .view => |view| switch (view) {
+        .view => |view| if (t.what == .body) switch (view) {
             .top => {
                 pane.scrollBy(t.cur_row - pane.scroll());
                 pane.ensureCursorVisible();
@@ -545,10 +545,11 @@ fn executeNormalAction(p: *Pardes, t: *Text, semantic: modal.Normal.Action) void
             p.leader_on = true;
             p.leader_n = 0;
         },
-        .command_line => {
-            p.enterTagEdit(pane, -1);
-            if (pane.tag_edit) t.mode = .normal;
-        },
+        // `:` is the one key a tag and a body do not share: it moves the
+        // keyboard between them.
+        .command_line => if (t.what == .tag) {
+            pane.focus = .body;
+        } else p.enterTag(pane),
         .pipe_selection => |how| return p.startPrompt(pane, .{ .pipe = how }),
         .search => return p.startPrompt(pane, .{ .search = config.search_marker }),
         .search_step => |direction| return look.lookWalk(
@@ -590,10 +591,7 @@ pub fn handlePdfNormal(p: *Pardes, pane: *Pane, key: Key) void {
                     p.leader_on = true;
                     p.leader_n = 0;
                 },
-                .command_line => {
-                    p.enterTagEdit(pane, -1);
-                    if (pane.tag_edit) pane.body.mode = .normal;
-                },
+                .command_line => p.enterTag(pane),
                 .search => p.startPrompt(pane, .{ .search = config.search_marker }),
                 .search_forward => look.lookWalk(p, 1),
                 .search_backward => look.lookWalk(p, -1),