8afffece

test: pin that a selection paints its cells plain, whatever style they carry

a73x 2026-09-04 18:04

Commit message

test: pin that a selection paints its cells plain, whatever style they carry

An inversion over a bold red cell that kept its own pen is a selection the
user cannot read: the terminal renders inverse-on-red rather than the
highlight. Nothing pinned it — every screen a selection test authored was
default-styled, so the guard that suppresses SGR inside the span could be
removed with the whole suite still green. Watched failing with that guard
dropped: the span came back carrying its own bold and red.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CsWfuJFQbTfGtKZLS5qw4q

src/tui/paint.zig

+    );
+test "rowToVt: a selection paints its cells PLAIN, whatever style they carry" {
+    // An inversion over a bold red cell that kept its own pen is a selection
+    // the user cannot read: the terminal renders inverse-on-red, not the
+    // highlight. The span opens with a full reset and emits no SGR of its
+    // own, so a styled row under a selection comes out uniformly inverted —
+    // and the head before it keeps its style, which is what says the reset
+    // belongs to the span and not to the row.
+    const alloc = std.testing.allocator;
+    const g = try authoredGrid(alloc, 12, 2, "\x1b[2;1H\x1b[1;31mabcdef");
+    defer g.deinit();
+    const row = try rowToVt(alloc, g, 1, .{ .col_off = 0, .cols = 80 }, .{ .from = 3, .to = 11 });
+    defer alloc.free(row);
+    try std.testing.expectEqualStrings(
+        "\x1b[0m\x1b[0;1;31mabc\x1b[4G\x1b[0m\x1b[7mdef      \x1b[0m",
+        row,
+    );
+}
+test "renderClipped inverts the highlighted rows and leaves the rest alone" {
+    const alloc = std.testing.allocator;
+    const g = try authoredGrid(alloc, 12, 4, "row-zero\r\nrow-one\r\nrow-two\r\nrow-three");