[Feature request] Additional support for Japanese/UTF character encodings; also display recent encodings

[SpongebobSquamirez]

Description of the Issue

Dealing with Japanese programming, text files, etc. in general (e.g. ROM hacking, when working in Japan, etc.) can require inspecting files with encodings besides just Shift-JIS: in particular, there are other very standard character encodings for Japanese that I'd like to be able to switch to; namely, at least JIS and EUC, if not also UTF-16/32:
https://en.wikipedia.org/wiki/ISO/IEC_2022#ISO-2022-JP
https://en.wikipedia.org/wiki/Extended_Unix_Code

Source: https://en.wikipedia.org/wiki/Japanese_language_and_computers#Character_encodings

Showing recently used encodings would also be a big help...

Steps to Reproduce the Issue

1. Encoding->Character Sets ->Japanese
2. See that there's only Shift-JIS available
3. Alternatively, open a file encoded in EUC or old JIS/be unable to confirm whether it's encoded that way

Expected Behavior

The ability to change the character encoding to EUC or JIS.
Having the ability to set favorites or see recently used encodings would also be handy since going through 3 menus to select my encoding of choice every time SUCKS.

Actual Behavior

Can only switch to Shift-JIS/UTF-8. From looking at past issues and online, it sounds like UTF-16 is supposed to be supported by Notepad++, but I don't see it in the menu.

[xylographe]

Notepad++ does not support UTF-16.

[SpongebobSquamirez]

Well in that case, add that to my request (though not to the exclusion of JIS/EUC)

[SpongebobSquamirez]

Another editor with support for many different Japanese encodings, for reference: https://mijet.eludevisibility.org/JWPxp/JWPxp.html

[chcg]

See https://en.wikipedia.org/wiki/UTF-16 for the difference between UTF-16 and UCS-2:

UTF-16 arose from an earlier fixed-width 16-bit encoding known as UCS-2 (for 2-byte Universal Character Set) once it became clear that more than 2^16 code points were needed.[1]

See https://www.scintilla.org/ScintillaDoc.html#SCI_STYLESETCHARACTERSET
for the supported characterset of scintilla on the windows platform.

[SpongebobSquamirez]

Okay, I guess that is somewhat helpful for understanding what I said about utf-16, but neither of the comments that have been made on this thread by others talk about the main thing I'm requesting, which is more Japanese support...

[Ekopalypse]

@weirdalsuperfan

I guess that is somewhat helpful for understanding what I said about utf-16

Isn't that the whole reason for discussing something, to get a better understanding what needs to be done?

However, if scintilla does not support it, then there is less to nothing which npp can do to support it. Neil, made a decision a while ago to remove the support for EUC because of some performance issues.

So in order to get this done, you need to convince the scintilla team to support it in first place.

[SpongebobSquamirez]

@Ekopalypse The point is to not just discuss "something," but the matter at hand. UTF-16 is totally secondary to the Japanese support I was requesting.

Thank you for address my concern about Japanese support. Sucks to see support was dropped, although that was 9 years ago, so maybe Neil will change his mind. I'll see about taking this request to Scintilla.