Section anchor depends on the rendering mode
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	Ltrlg
	Mar 29 2015, 12:33 PM

Description

In fr:Circuit de Sawyer-Tower, a section title contains a <math> tag and the section anchor depends on the rendering mode:

Le_cycle_d.27hyst.C3.A9r.C3.A9sis in PNG mode;
Le_cycle_d.27hyst.C3.A9r.C3.A9sis_.24_P.28E.29_.24 in TeX and MathJax modes;
Le_cycle_d.27hyst.C3.A9r.C3.A9sis_.0A.0A_.0A_P.0A_.28.0A_E.0A_.29 in MathML mode.

This may break links between articles for people changing the rendering mode.

Status	Assigned	Task
Open	None	T96152 Problems with Math in section titles
Open	None	T28213 Strip marker (UNIQ / QINU) issues (tracking)
Open	None	T94344 Section anchor depends on the rendering mode
Resolved	Physikerwelt	T78046 Implement a single math rendering mode that works across all devices (MathML / SVG using mathoid)
Resolved	• mobrovac	T71702 Support PNG output for mathoid
Declined	Physikerwelt	T78056 Storing PNG images retrieved from mathoid
Declined	Physikerwelt	T100514 use binary data rather than text data for math_mathml, math_html and math_svg fields
Resolved	Physikerwelt	T74547 Minimize SVG output
Resolved	Physikerwelt	T34694 Use baseline shift when positioning inline math PNGs or SVGs
Invalid	Esanders	T53698 Parsoid: Output MathJax rendering for Math tags instead of images
Open	None	T54031 Allow extension options to be specified in API calls
Resolved	• mobrovac	T132096 Improve save / preview performance of MathML math rendering mode
Resolved	• mobrovac	T132536 Re-render Mathoid's PNGs stored in RESTBase
Resolved	Physikerwelt	T132607 Increase font size for MathML
Open	None	T242327 QINU appears instead of math in section names in search results

Ltrlg raised the priority of this task from to Needs Triage.

Ltrlg updated the task description. (Show Details)

Ltrlg added a project: Math.

Ltrlg added subscribers: Ltrlg, Aklapper.

The code responsible for this is at function
formatHeadings at core/includes/parser/Parser.php

This seems a bit weird.

When I'm logged in, the equation is missing from TOC

E.g.,

and the link is <a href="#Le_cycle_d'hystérésis">1.1 Le cycle d'hystérésis</a>

When I'm logged out, it is present:

and the link in the TOC is <a href="#Le_cycle_d'hystérésis_'"UNIQ--postMath-00000001-QINU`"'">1.1 Le cycle d'hystérésis ...`

I tried purging the page with no change.

Does anybody have an idea what's going on here?

Physikerwelt triaged this task as Medium priority.Dec 7 2018, 7:20 AM

Something with the strip marker seems broken. T209446 might be caused by the same issue. The marker tags are generated here https://github.com/wikimedia/mediawiki-extensions-Math/blob/714b642618c6b43294dd4712dab978ada578d2f7/src/MathHooks.php#L211 and then eventually replaced here and then supposedly removed here https://github.com/wikimedia/mediawiki-extensions-Math/blob/714b642618c6b43294dd4712dab978ada578d2f7/src/MathHooks.php#L377-L379 . In this procedure there is an ugly workaround for T103269 which I guess causes the problem.

	F27408298: image.png
	Dec 6 2018, 10:06 PM

	F27408312: image.png
	Dec 6 2018, 10:06 PM