vaxis sends a frame with nothing changed as nothing: its secondary-cursor test read equal as changed

1 files changed, 6 insertions, 0 deletions

diff --git a/build.zig b/build.zig
index 2419dd59..8b7cb3b2 100644
--- a/build.zig
+++ b/build.zig
@@ -881,6 +881,12 @@ pub fn build(b: *std.Build) void {
             \\            (last.eql(cell) or blankInkOnly(&last, &cell)) and // pardes's patch (its build.zig)
             \\
         ) catch @panic("OOM");
+        // And the secondary cursors count as changed when they differ, not
+        // when they are the same: read the other way round, every render
+        // started a frame, ~40 bytes to the terminal with nothing changed.
+        const secondary_anchor = "        std.meta.eql(self.screen.cursor_secondary, self.state.cursor_secondary);\n";
+        if (std.mem.count(u8, render_src, secondary_anchor) != 1) std.debug.panic("vaxis's Vaxis.zig changed at `{s}`: redo its patch in build.zig", .{secondary_anchor});
+        render_src = std.mem.replaceOwned(u8, b.allocator, render_src, secondary_anchor, "        !std.meta.eql(self.screen.cursor_secondary, self.state.cursor_secondary); // pardes's patch (its build.zig)\n") catch @panic("OOM");
         const blank_ink =
             \\
             \\/// pardes's patch (its build.zig): a blank cell (a space, no underline,