[BITV/A11Y] PDF-Viewer: Accessibility Issues

[AndyScherzinger]

Moved over from nextcloud/server#21443

Details see wcagFixes.xlsx as well as discussions in nextcloud/server#21443 (comment)

• [BITV/A11Y] Using label elements to associate text labels with form controlsCannot control #631
• [BITV/A11Y] Zooming and Scaling to be turned onCannot control pdf viewer #632
• [BITV/A11Y] Keyboard focus flow is not easily programmed, multiple rewrites would be needed. Focus is still there but just not in the expected flow at times. #633
• [BITV/A11Y] Link at the top of each page to skip to main content areaCannot control #634
• [BITV/A11Y] Elements should not have tabindex greater then zeroCannot control #635
• [BITV/A11Y] No aria-expandCannot control #636

--> Cannot control pdf viewer , it is another third party application within the application. There is a download option available to avoid using the viewer.

[PVince81]

we should at least update pdf.js to the latest version, in case some of these are fixed

also, if they tested NC <= 22 it's likely that we already updated it recently

[PVince81]

looks like master is already on the latest version https://www.npmjs.com/package/pdfjs-dist (2.14.305) from 2 months ago

[AndyScherzinger]

The above (potentially still existing) issues would still need to be checked.