Prompting for a filename

In saveFile() we had a placeholder of this case, and we'll replace it with:

        // will prompt for a filename
        return;

        var al = try e.promptForInput(message.prompt.get("fname").?);
        defer al.deinit(e.alc);

        if (al.items.len > 0) {
            B.filename = try e.updateString(B.filename, al.items);
        }
        else {
            try e.statusMessage("Save aborted", .{});
            return;
        }

We need a new StringMap in our message module:

const prompt_messages = .{
    .{ "fname", "Enter filename, or ESC to cancel: " },
};

pub const prompt = std.StaticStringMap([]const u8).initComptime(prompt_messages);

Binding Ctrl-S to save the file

We don't have yet a way to save, because we didn't bind a key. We add a new branch to the processKeypress function:

        .ctrl_s => try e.saveFile(),

And that's about it. If you compile and run with:

./kilo some_new_file

you should be able to edit the file, give it a name and save it.