Third parameter of speak() ignores tts_default_text_processing_callback

[TomJoey]

Hello, the third parameter of the speak function causes @tts_default_text_processing_callback to be ignored. I am unsure if this behavior is intended; if it is, should the third parameter in form.nvgt be removed? I am currently developing a Chinese game and intend to use an external translation method for the UI components, but this issue renders the translation ineffective. Thank you.

[samtupy]

Hi,

I tried reproducing your issue with the following code:

#include "speech.nvgt"
string cb(const string&in t) { return "replaced"; }
void main() {
	@tts_default_text_processing_callback = cb;
	speak("test");
}

The screen reader speaks "replaced", indicating the callback worked successfully.

If this isn't the solution, can you please provide some example code?

Thanks.

[TomJoey]

The simplest workaround is to replace the "blank" in the form with something else. Essentially, when you press the down arrow, the program mistakenly treats that "blank" as user input and skips translating it—even though that isn't actually the case. I’m uploading a brief demonstration code.

[TomJoey]

"""#include "form.nvgt"
audio_form f;
void main ()
{
f.create_window("pleas press key_down",true);
@tts_default_text_processing_callback = translation_callback;
int iname=f.create_input_box("Enter a username");
bool _while = true;
f.focus(iname);
while (_while)
{
wait (5);
f.monitor();
if(key_pressed(KEY_ESCAPE))
{
_while = false;
}
}
}

string translation_callback (const string&in text)
{
if (text == "Blank")
{
return ("1");
}
return text;
}"""

[harrymkt]

Hi.

So I went to investigate the speech.nvgt, and it turned out that it is not the cause of it.

As you see, if you press Up Arrow, the Blank is replaced with 1.

The reason that it is not replacing is because lines like these in form.nvgt:

speak(read_line(0), true, null);

As you see, it uses null as the third parameter. So this meant that the form is treating everything as text which should not be replaced, thus null, in the text processing callback.