add New builtin for an empty temporary file in the calling column

1 files changed, 11 insertions, 0 deletions

diff --git a/src/builtins.zig b/src/builtins.zig
index 578a60dd..b89952cd 100644
--- a/src/builtins.zig
+++ b/src/builtins.zig
@@ -345,6 +345,17 @@ pub const Save = struct {
     }
 };
 
+/// Ask the native shell for an atomically-created empty temporary file. The
+/// pane and its lifetime serial are the placement token: by the time IO
+/// finishes another column may be active, or this slot may even have been
+/// reused, and neither is permission to put the document somewhere else.
+pub const New = struct {
+    pub fn run(c: Ctx) void {
+        if (c.p.freeSlot() == null) return;
+        c.p.emit(.{ .new_file = .{ .pane = @intCast(c.id), .serial = c.pane.serial } });
+    }
+};
+
 pub const Newcol = struct {
     pub fn run(c: Ctx) void {
         const free = c.p.freeSlot() orelse return;