The tree serves the layout: /layout, /tag and /col/<n>/tag

A script could not see where the panes sit or edit the tags a person
clicks in. /layout lists each column, its index, x and width in cells,
current or not, empty or full, and its panes' serials, then the active
column; /tag is the workspace tag and /col/<n>/tag a column's, read and
written as a pane tag is (one line: a newline written in is a space, and a
truncating write drops the one ending it); /index's lines end with the
pane's column; the log says newcol <n> and delcol <n>. acme serves no
column files, and the docs say so.

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

1 files changed, 10 insertions, 1 deletions

diff --git a/src/layout.zig b/src/layout.zig
index c58f3bcf..6de7a912 100644
--- a/src/layout.zig
+++ b/src/layout.zig
@@ -280,7 +280,7 @@ pub fn applyRowSplit(p: *Pardes, cc: usize, k: usize, cur_y: u16) void {
     b.vweight = pair - a.vweight;
 }
 
-pub fn findPane(p: *Pardes, id: usize) ?struct { col: usize, idx: usize } {
+pub fn findPane(p: *const Pardes, id: usize) ?struct { col: usize, idx: usize } {
     for (0..p.ncol) |c| {
         for (0..p.col_n[c]) |k| {
             if (p.col_panes[c][k] == id) return .{ .col = c, .idx = k };
@@ -325,6 +325,14 @@ pub fn dropColumn(p: *Pardes, c: usize) void {
     p.ncol -= 1;
     p.col_tags[p.ncol] = .{ .what = .column, .gpa = p.gpa };
     p.col_serial[p.ncol] = 0;
+    noteColumn(p, "delcol", c);
+}
+
+/// `newcol <n>` or `delcol <n>` in the log: the index, as /layout and
+/// /col number columns, the ones after it moving up or down one.
+fn noteColumn(p: *Pardes, what: []const u8, c: usize) void {
+    var buf: [16]u8 = undefined;
+    pardes.ctlfs.events.notePath(p, what, std.fmt.bufPrint(&buf, "{d}", .{c}) catch return);
 }
 
 /// Fold column `c` into the one on its right, its panes below theirs.
@@ -480,6 +488,7 @@ pub fn insertColumn(p: *Pardes, col: usize, before: bool) ?usize {
     p.col_serial[c] = 0;
     p.col_n[c] = 0;
     p.ncol += 1;
+    noteColumn(p, "newcol", c);
     return c;
 }