https://bugzilla.wikimedia.org/show_bug.cgi?id=31366

       Web browser: ---
             Bug #: 31366
           Summary: File description page thumbnail click versus EXIF
                    rotation, mustRender()
           Product: MediaWiki
           Version: 1.18
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Unprioritized
         Component: Images and files
        AssignedTo: [email protected]
        ReportedBy: [email protected]
                CC: [email protected], [email protected]
    Classification: Unclassified


Clicking the large 800px thumbnail on a file description page leads to the
source image being viewed as if it were a page in the browser. This kind of
made sense as a quick hack for enlarged views when image resize was first
introduced. But for files with mustRender(), the behaviour is undesirable,
since the browser's behaviour when the user clicks on that link is typically
surprising and unpredictable.

This came up on IRC recently when a user complained that clicking on a
description page thumbnail which has been rotated using the new EXIF
autorotation feature resulted in an incorrectly rotated enlarged image being
displayed. Such images have mustRender() == true.

I suggest making thumbnail clicks for files with mustRender() == true do
nothing, i.e. don't wrap that image with a link. Instead, provide a text link
to the source file in the area below the thumbnail. 

Ideally thumbnail clicks of images with mustRender() == false would provide
some kind of sensible, interactive enlargement interface, rather than causing
all navigation to disappear and instructing the browser to download and
decompress potentially hundreds of megabytes of image data.

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