How can I get the encoding of current document?

[xb zhou]

Hello, I want to get the encoding of current document, such as UTF8、ANSI、Chinese GB2312。

I use code below:

int32_t buffer_id = ::SendMessage(nppData._nppHandle, NPPM_GETCURRENTBUFFERID, 0, 0);
int32_t encoding = ::SendMessage(nppData._nppHandle, NPPM_GETBUFFERENCODING, buffer_id, 0);

The encoding return 0, when the document’s encoding is ANSI(show in Encoding menu of Notepad++)，But Both return 4 when the document’s encoding is UTF8 and Chinese GB2312.

So, I can’t distinguish UTF8 and GB2312. What’s wrong? Thanks a lot!

[gstavi]

First, is this relevant?
Getting encoding in x64 plugin

Second, make sure you distinguish encoding from codepage.
Perhaps you need also Scintilla SCI_GETCODEPAGE message.

[Coises]

@xb-zhou said in How can I get the encoding of current document?:

So, I can’t distinguish UTF8 and GB2312. What’s wrong?

Per documentation, NPPM_GETBUFFERENCODING returns a UniMode enum, which is defined here.

Notepad++ doesn’t handle character sets internally the way it appears to a user. For editing, everything is either in the user default code page (“ANSI”) or in UTF-8. Whenever you’re not using the default code page, Notepad++ uses UTF-8 (so it is possible to enter and see characters that aren’t in the code page). Translation to other code pages is done when reading and writing the file. I don’t know the details beyond that; if no one else responds with a deeper explanation, you’ll probably need to read the code to figure out what will work for your particular use case.

[Alan Kilborn]

THIS THREAD got off into a tangent about encoding issues; might want to have a look there to round out some understanding about how it all works.

[xb zhou]

@gstavi Yes，SCI_GETCODEPAGE message is what I find. Thank you verymuch.

[xb zhou]

@Coises Thank you for your answer! It was very valuable.

[xb zhou]

@Alan-Kilborn Thank you!