terminal: OSC 133 N

src/terminal/Terminal.zig

@@ -1093,6 +1093,19 @@ pub fn semanticPrompt(
             // command but we don't yet handle these in any meaningful way.
         },
 
+        .new_command => {
+            // Same as OSC "133;A" but may first implicitly terminate a
+            // previous command: if the options specify an aid and there
+            // is an active (open) command with matching aid, finish the
+            // innermost such command (as well as any other commands
+            // nested more deeply). If no aid is specified, treat as an
+            // aid whose value is the empty string.
+            try self.semanticPrompt(.{
+                .action = .fresh_line_new_prompt,
+                .options_unvalidated = cmd.options_unvalidated,
+            });
+        },
+
         .prompt_start => {
             // Explicit start of prompt. Optional after an A or N command.
             // The k (kind) option specifies the type of prompt:

src/terminal/stream_readonly.zig

@@ -967,3 +967,35 @@ test "semantic prompt prompt_start" {
     try testing.expectEqual(@as(usize, 5), t.screens.active.cursor.x);
     try testing.expectEqual(@as(usize, 0), t.screens.active.cursor.y);
 }
+
+test "semantic prompt new_command" {
+    var t: Terminal = try .init(testing.allocator, .{ .cols = 10, .rows = 10 });
+    defer t.deinit(testing.allocator);
+
+    var s: Stream = .initAlloc(testing.allocator, .init(&t));
+    defer s.deinit();
+
+    // Write some text
+    try s.nextSlice("Hello");
+    try s.nextSlice("\x1b]133;N\x07");
+
+    // Should behave like fresh_line_new_prompt - cursor moves to column 0
+    // on next line since we had content
+    try testing.expectEqual(@as(usize, 0), t.screens.active.cursor.x);
+    try testing.expectEqual(@as(usize, 1), t.screens.active.cursor.y);
+    try testing.expectEqual(.prompt, t.screens.active.cursor.semantic_content);
+}
+
+test "semantic prompt new_command at column zero" {
+    var t: Terminal = try .init(testing.allocator, .{ .cols = 10, .rows = 10 });
+    defer t.deinit(testing.allocator);
+
+    var s: Stream = .initAlloc(testing.allocator, .init(&t));
+    defer s.deinit();
+
+    // OSC 133;N when already at column 0 should stay on same line
+    try s.nextSlice("\x1b]133;N\x07");
+    try testing.expectEqual(@as(usize, 0), t.screens.active.cursor.x);
+    try testing.expectEqual(@as(usize, 0), t.screens.active.cursor.y);
+    try testing.expectEqual(.prompt, t.screens.active.cursor.semantic_content);
+}