385678 - improve chart alt tag

Status: RESOLVED DUPLICATE of bug 278461

(Bugzilla :: Reporting/Charting, enhancement)

Description

[timeless]

dveditz attacked the bugzilla charting because he had turned off image loading and the alt tag wasn't helpful.

actual results:
<img alt="Graphical report results" src="chart.cgi?...

expected results:
<img alt="Graphical report results - if you can see this, images are off" ...

Comment 1

[timeless]

Attachment: alter alt tag

Comment 2

[Frédéric Buclin]

Comment on attachment 273467 [details] [diff] [review]
alter alt tag

>-  <img alt="Graphical report results" src="[% imageurl %]"
>+  <img alt="Graphical report results - if you can see this, images are off"

That's not the goal of the alt attribute! Else all alt attributes in the world should contain such a message, which doesn't make sense. Moreover, the message is wrong as the URL could be broken or there could be an internal error which prevents the generation of the image. This bug should be closed as WONTFIX.

Comment 3

[Gervase Markham [:gerv]]

(In reply to comment #2)
> That's not the goal of the alt attribute! Else all alt attributes in the world
> should contain such a message, which doesn't make sense. 

That's not true. It would contain such a message only when the image could not be represented at all as text - which is the case here. We could set it to "" but that would leave people with images turned off or who were blind without an explanation of what was going on.

I agree timeless' text could use some work, but I think the principle is right. Something like:

"Chart of X against Y which cannot be summarised as text. Please turn on images if you have the capability to view them."

Gerv