Module talk:DecodeEncode

Module:DecodeEncode is permanently protected from editing as it is a heavily used or highly visible module. Substantial changes should first be proposed and discussed here on this page. If the proposal is uncontroversial or has been discussed and is supported by consensus, editors may use {{edit template-protected}} to notify an administrator or template editor to make the requested edit.

About U+03B5 ε GREEK SMALL LETTER EPSILON (ε ε)

• Issue: after resolving HTML entity ε by mw.text.decode(), the plain character is not found by mw.ustring.gsub(). No issue with alternative HTML entity ε. ε good, ε bad.

Report limitations: Original report and bug reproduction is at enwiki Module talk:DecodeEncode, from where en:module:DecodeEncode and en:module:String are used live. At phabricator pseudocode may be used and some "results" may be hardcoded. In-text the escape & is used, not in-function. Lua patterns not used ("no %").

• To reproduce:

1. Create research string:

Xε1Xε2X (shows live and unedited as: Xε1Xε2X)

2. Render the string by decode() (as inner function)

3. then on rendered result use gsub() to replace plain character ε → E: (as outer function)

mw.ustring.gsub( s=(mw.text.decode( s=Xε1Xε2X, decodeNamedEntities=true ) ), pattern=ε, repl=E ) [is pseudo-code, see note. 21:10, 7 February 2023 (UTC)]

4. Result3 (s&r pattern use ε from Xε1X):

XE1XE2X

5. Result4 (s&r pattern use ε from Xε2X):

XE1XE2X

• Expected: XE1XE2X (only one character ε exists)

• Note 21:10, 7 February 2023 (UTC): This step 3 is in pseudo-code. To reproduce, use Lua modules module:String and Module:DecodeEncode:

{{#invoke:String|replace|source={{#invoke:DecodeEncode|decode|s=Xε1Xε2X}}|pattern=ε|replace=E|plain=true}}

→ XE1XE2X

-DePiep (talk) 21:10, 7 February 2023 (UTC)[reply]

Workaround A, ad hoc: add innermost function to first replace in the research string ε → ε:

A1: {{#invoke:String|replace|source={{#invoke:DecodeEncode|decode|s={{#invoke:String|replace|source=Xε1Xε2X|pattern=ε|replace=ε|plain=true}}}}|pattern=ε|replace=E|plain=true}} →

XE1XE2X

Workaround B: early in :en:module:DecodeEncode, replace ε → ε

About THIN SPACE: it looks like character U+2009 THIN SPACE (   ) has a samilar issue.   good,   bad.

Currently in code:

function p._decode( s, subset_only )
	local ret = nil;
    s = mw.ustring.gsub( s, ' ', ' ' ) -- Workaround for bug:   gets properly decoded in decode, but   doesn't.
	ret = mw.text.decode( s, not subset_only )
	return ret
end

In en:module:DecodeEncode/sandbox, I have coded a similar handling of EPSILON:

module:DecodeEncode, module:DecodeEncode/sandbox diff

function p._decode( s, subset_only )
	local ret = nil;
	-- U+2009 THIN SPACE: workaround for bug: HTML entity   is decoded incorrect. Entity   gets decoded properly
	s = mw.ustring.gsub( s, ' ', ' ' )
	-- U+03B5 ε GREEK SMALL LETTER EPSILON: workaround for bug (phab:T328840): HTML entity ε is decoded incorrect for gsub(). Entity ε gets decoded properly
	s = mw.ustring.gsub( s, 'ε', 'ε' )
	ret = mw.text.decode( s, not subset_only )
	return ret
end

• /sandbox tests:

B. {{#invoke:String|replace|source={{#invoke:DecodeEncode/sandbox|decode|s=Xε1Xε2X}}|pattern=ε|replace=E|plain=true}}

B1. ResultB1 (s&r pattern use ε from Xε1X): XE1XE2X

B2. ResultB2 (s&r pattern use ε from Xε2X): XE1XE2X

I propose to edit the module along this way.

Changes in mw, Lua: I have not idea.

• I propose to consider module editing along § Workaround B. -DePiep (talk) 12:26, 4 February 2023 (UTC)[reply]

• Original failure, now solved=not showing any more:

(hardcoded explanation here): in cell marked N, the result showed as "XE1Xε2X". That is: wikitext input "ε" was not recognised & replaced. -DePiep (talk) 07:49, 19 February 2023 (UTC)[reply]

EPSILON ε ⟨ε⟩ error & fix proposal (16 Feb 2023)
1	2	3	4	5	6
id	entity code	plain	mod:.. decode(&entity;)	replace(decode(..)) with E pattern=hardcoded ⟨ε⟩ from plain (s=&entity;) (s=checkstring)	mod:..decode/sandbox
checkstring	X&epsi;1X&epsilon;2X	>Xε1Xε2X<	>Xε1Xε2X<
EPSI	&epsi;	>ε<	>ε<	E XE1XE2X	E XE1XE2X
EPSILON	&epsilon;	>ε<	>ε<	E XE1XE2X N	E XE1XE2X

• See § Workaround B, in module (THIN SPACE example) for code change;

Similar fix as U+2009   THIN SPACE ( ,  ) has (though original cause bug may be different for THIN SPACE).

• Phabricator T328840 did not gain traction. Would be mw-level, not this module.

-DePiep (talk) 06:22, 16 February 2023 (UTC)[reply]

This edit request has been answered. Set the |answered= parameter to no to reactivate your request.

• Please copy all code from module:DecodeEncode/sandbox into module:DecodeEncode (diff)

Issue: bad decoding of HTML entity ε N

re U+03B5 ε GREEK SMALL LETTER EPSILON (ε, ε)

Change: fix by replacing with entity ε Y before applying decode(). See § Workaround B for code diff & backgrounds; minor comment change

Discussion: (1) reported at T328840, no responses (mw-level); (2) bug report here not challenged

Testcases: See § testcases EPSILON.

DePiep (talk) 06:49, 16 February 2023 (UTC)[reply]

 Done * Pppery * _{it has begun...} 03:11, 19 February 2023 (UTC)[reply]

Leaving this note here.

About NBSP, U+00A0   NO-BREAK SPACE ( ,  ). With input   I am experiencing problems reminding of § epsilon (T328840, now resolved).

When nested like: (replace|s=(decode|s=AB YZ)|replace=AB_YZ) returns breaking code (breaking when used in/with HTML/css code like span, sup, class).

No time to build the reproduction/test, so have to leave it for now. Not reported on phab. DePiep (talk) 07:27, 20 February 2023 (UTC)[reply]

This edit request has been answered. Set the |answered= parameter to no to reactivate your request.

Please replace all code Module:DecodeEncode with module:DecodeEncode/sandbox. (compare )

Change: apply require('strict'), and declade function local explicit. DePiep (talk) 14:34, 21 March 2023 (UTC)[reply]

• |answered=pause: needs some extra eyes first. Will invite. -DePiep (talk) 14:36, 21 March 2023 (UTC)[reply]

Invitation is out. -DePiep (talk) 14:49, 21 March 2023 (UTC)[reply]

Upd: Gonnym has made large improvements, so the sandboxdiff is large. I do not see strict-related changes. DePiep (talk) 21:31, 21 March 2023 (UTC)[reply]

The changes are good and no globals remain. The two mw.ustring could be string. Johnuniq (talk) 06:40, 22 March 2023 (UTC)[reply]

thx. As said, please someone with trust perform ER because me editing/commenting in between does not help. DePiep (talk) 08:18, 22 March 2023 (UTC)[reply]

• Set |answered=no after two positive critiques. Also, I met no error while developing with this sandbox. -DePiep (talk) 09:00, 22 March 2023 (UTC)[reply]

 Done — Martin (MSGJ · talk) 18:35, 22 March 2023 (UTC)[reply]