[wp-trac] [WordPress Trac] #43531: $content_width and Add Media (+ twentyseverteen?)

[WordPress Trac]

#43531: $content_width and Add Media (+ twentyseverteen?)
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 Reporter:  ChiefAlchemist  |      Owner:
     Type:  defect (bug)    |     Status:  new
 Priority:  normal          |  Milestone:  Awaiting Review
Component:  Media           |    Version:  4.9.4
 Severity:  normal          |   Keywords:
  Focuses:                  |
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 I apologize in advance if this isn't a bug. However, I couldn't seem to
 find any documentation on the expected behavior (e.g., there's nothing on
 the codex page for the image_size_names_choose filter). None the less, it
 certainly feels odd / awkward.

 When adding an image (to a post / page), the size setting select (Add
 Media > Attachment Display Setting > Size) doesn't feel quite right. I
 understand the relationship between (global) $content_width and this
 setting. That is, the <img> tag's width= is forced / maxed to the
 $content_width (if the image is wider than the $content_width).

 I see this happening for the size = large images, as well as any image
 sizes I've added via add_image_size() that are too wide. However, it
 (i.e., the forced max width=) doesn't happen to the size Medium when the
 Medium width is set wider than the content width.

 Perhaps this is intentional?

 Theme was twentyseventeen. Unfortunately, I've haven't had time to try to
 reproduce this on another theme. The size Medium was set to 800 x 800.

 I'd like to suggest the Settings > Media page display the current
 $content_width, as well as explain a bit, as well as link to a deeper
 explanation. As it is, a user can select a theme, blindly set the image
 sizes (not realizing who they actually map to the theme), and then be hit
 with the experience (?) described above, AND have no idea why.

 Truth be told, it took me too long to figure this out. Somehow I've
 managed to avoid $content_width. Too many custom themes maybe? :)

 Or am I just missing something about the intent of what otherwise feels
 like a sloppy experience?

 I hope this helps. TIA

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Ticket URL: <https://core.trac.wordpress.org/ticket/43531>
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