Rails - Feb 2007 - DRY question - image_tag :alt and :title the same

Hello,

I have the following:
image_tag(''show.png'', :alt => ''show
article'', :title => ''show
article'', :border => 0)

Is it possible that I don´t need to have "=> ''show
article''" twice in
this row? e.g. something similar to this pseudo code: (:alt, :title)
=> ''show article''.


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Short version: As far as tooltips go, :alt = IE and :title = FF. You'll need
both to display a tooltip across browsers. There _are_ differences between
them but I'm not sure if you're looking for that information so much as
"do
I need both". :)

RSL

On 2/28/07, Oliver Paulus <oliver@code-project.org>
wrote:
>
>
> Hello,
>
> I have the following:
> image_tag('show.png', :alt => 'show article', :title
=> 'show
> article', :border => 0)
>
> Is it possible that I don´t need to have "=> 'show
article'" twice in
> this row? e.g. something similar to this pseudo code: (:alt, :title)
> => 'show article'.
>
>
> >
>
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short answer, no there is no way to specify the value of 2 attributes
the way you describe.

you could write a helper tho

def my_image_tag(source, options = {})
  options.symbolize_keys!

  # if there is an alt attribute but no title attribute
  options[:title] = options[:alt] if options.has_key?(:alt) &&
!options.has_key?(:title)

  # if there is a title attribute but no alt attribute
  options[:alt] = options[:title] if options.has_key?(:title) &&
!options.has_key?(:alt)

  # don''t change anything if both or none are specified

  image_tag(source, options)
end

not tested, but should work, examples below

<%= my_image_tag(..., { :alt => ''alt tag'' }) %>
<img src="..." alt="alt tag", title="alt
tag"/>

<%= my_image_tag(..., { :title => ''title tag'' }) %>
<img src="..." alt="title tag", title="title
tag"/>

<%= my_image_tag(...) %>
<img src="..."/>

<%= my_image_tag(..., { :alt => ''alt tag'', :title =>
''title tag'' }) %>
<img src="..." alt="alt tag", title="title
tag"/>



On 2/28/07, Oliver Paulus <oliver-fVVcvapDXlXWsZ/bQMPhNw@public.gmane.org>
wrote:
>
> Hello,
>
> I have the following:
> image_tag(''show.png'', :alt => ''show
article'', :title => ''show
> article'', :border => 0)
>
> Is it possible that I don´t need to have "=> ''show
article''" twice in
> this row? e.g. something similar to this pseudo code: (:alt, :title)
> => ''show article''.
>
>
> >
>
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> Short version: As far as tooltips go, :alt = IE and :title = FF.
You''ll need
> both to display a tooltip across browsers.
<...>

No. IE will display alt attribute as tooltip, Firefox won''t (and
sholudn''t). However,
they will both display title attribute.
Alt is supposed to be used when image cannot be shown - not available
on server, user
has disabled images, text-only browser.


Regards,
Rimantas
--
http://rimantas.com/

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Heh. You caught me. I didn''t mention that IE respects :title [because I
didn''t think it necessary since I was talking about specifically about
tooltips alt vs. title ]. Please don''t embarrass me further by pointing
out
that other browsers than IE and FF support these tags as well. ;)

RSL

On 3/2/07, Rimantas Liubertas
<rimantas-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
>
> > Short version: As far as tooltips go, :alt = IE and :title = FF.
You''ll
> need
> > both to display a tooltip across browsers.
> <...>
>
> No. IE will display alt attribute as tooltip, Firefox won''t (and
> sholudn''t). However,
> they will both display title attribute.
> Alt is supposed to be used when image cannot be shown - not available
> on server, user
> has disabled images, text-only browser.
>
>
> Regards,
> Rimantas
> --
> http://rimantas.com/
>
> >
>
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I thought there is a ruby way of doing this. Now I implemented a small
plugin which extends ActionView::Base, ActionView::Helpers::TagHelper
tag method to have a "single point of change" (DRY) - because I needed
it for image_tag, image_submit_tag, etc.
Thank you for your help.


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Further to Rimantas explanation, browser implementation isn''t really
the issue here as the two attributes are intended for different
purposes and setting them to the same value is incorrect; you can find
a good outline of the issues @
http://www.456bereastreet.com/archive/200412/the_alt_and_title_attributes/

On Mar 5, 4:39 pm, "Oliver Paulus"
<oli...-fVVcvapDXlXWsZ/bQMPhNw@public.gmane.org>
wrote:
> I thought there is a ruby way of doing this. Now I implemented a small
> plugin which extends ActionView::Base, ActionView::Helpers::TagHelper
> tag method to have a "single point of change" (DRY) - because I
needed
> it for image_tag, image_submit_tag, etc.
> Thank you for your help.

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