Let the keyboard reach a tag's path, read-only

The tag's computed path, dirty marker and page were out of the keyboard's
reach: its cursor lived in the text after them. It now lives in the tag as
shown, as in acme where the name is ordinary text at the start of the tag, so
`0` goes to the line's start and motions select and yank the path. The path
stays read-only: an edit that would change it is refused and leaves the
cursor where it was, and typing into a file's path drafts a new name as a
click on it does. Sync moves the tag's positions when the prefix changes
length, so a rename or the dirty marker still never moves the cursor off the
text after it.

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

1 files changed, 7 insertions, 9 deletions

diff --git a/src/body_layer.zig b/src/body_layer.zig
index ff1f903c..f9e26b10 100644
--- a/src/body_layer.zig
+++ b/src/body_layer.zig
@@ -925,8 +925,7 @@ pub fn paintPaneTag(p: *Pardes, arena: std.mem.Allocator, pane: *Pane, r: Rect,
         .{ .row = 0, .at = @min(lines[0].len, @as(usize, @intCast(@max(0, pane.input.cur_col)))) }
     else if (pane.focus == .tag and pane.prompt == .none and pane.tag.cur_row >= top and pane.tag.cur_row < top + rows) caret: {
         const row: usize = @intCast(pane.tag.cur_row - top);
-        const lead: usize = if (row + top == 0) prefix_len else 0;
-        break :caret .{ .row = row, .at = @min(lines[row].len, lead + @as(usize, @intCast(@max(0, pane.tag.cur_col)))) };
+        break :caret .{ .row = row, .at = @min(lines[row].len, @as(usize, @intCast(@max(0, pane.tag.cur_col)))) };
     } else null;
     if (caret) |at| {
         const line = lines[at.row];
@@ -968,19 +967,18 @@ pub fn paintPaneTag(p: *Pardes, arena: std.mem.Allocator, pane: *Pane, r: Rect,
     // time. A range of one grapheme is the block cursor, not a selection.
     if (pane.focus == .tag) {
         var ranges: [Text.max_selections]modal.Selection = undefined;
-        const got = pane.tag.ranges(tail, 0, &ranges);
+        const got = pane.tag.ranges(whole, 0, &ranges);
         for (ranges[0..got.n]) |range| {
             const lo = @min(range.anchor, range.head);
             const hi = @max(range.anchor, range.head);
-            if (modal.nextGrapheme(tail, lo) >= hi) continue;
-            const first = modal.positionAt(tail, lo);
-            const last = modal.positionAt(tail, hi);
+            if (modal.nextGrapheme(whole, lo) >= hi) continue;
+            const first = modal.positionAt(whole, lo);
+            const last = modal.positionAt(whole, hi);
             var row = @max(first.row, top);
             while (row <= last.row and row < top + rows) : (row += 1) {
                 const line = lines[row - top];
-                const lead: usize = if (row == 0) prefix_len else 0;
-                const from = lead + if (row == first.row) first.col else 0;
-                const to = @min(line.len, lead + if (row == last.row) last.col else modal.lineSlice(tail, row).len);
+                const from = if (row == first.row) first.col else 0;
+                const to = @min(line.len, if (row == last.row) last.col else line.len);
                 var col = panes.File.rawDisplayCol(line, from) -| pane.tag_scroll;
                 const end = panes.File.rawDisplayCol(line, to);
                 const y = tag_y + @as(u16, @intCast(row - top));