On 3 avr, 19:22, Mike Orr <sluggos...@gmail.com> wrote:
> On Fri, Apr 3, 2009 at 7:38 AM, KLEIN Stéphane <klein.steph...@gmail.com>
> wrote:
>
> > Hi,
>
> > What do you think about this web helper function ?
>
> > ::
>
> > def tag_class(values):
> > values = [v for v in values if v != None]
> > if values:
> > return 'class="%s"' % " ".join(values)
> > return ''
>
> > Example of use in mako template :
>
> > ::
>
> > <tr>
> > % for i, column in enumerate(c.columns):
> > <th ${h.tag_class(("firstcolumn" if i == 0 else None, "asc" if
> > request.GET.get("o") == "asc" else None))}>${column.name}</th>
> > % endfor
> > </tr>
>
> > Thanks for your comment.
>
> > Regards,
> > Stephane
>
> The first thing is to use the HTML object to create tags. This
> handles escaping in case the values contain markup characters, and is
> the way all WebHelpers tags are built.
>
> from webhelpers.html import HTML
> print HTML.th(column.name, class_="firstcolumn asc")
>
> This can be done in a template of course.
>
> <%! from webhelpers.html import HTML %>
> ${HTML.th(column.name, class_="firstcolumn asc")}
>
> This also means the function should return only the attribute value,
> not the complete attribute. I could go either way on that, since
> programmable CSS classes are very common in applications. I would
> filter out all false values, not just None, because an empty string is
> useless as a CSS class. What one really wants is a list of
> corresponding conditions and the value to choose if true. I'm not
> sure what's the best data structure for this.
>
> def css_classes(value_condition_pairs):
> classes = []
> for value, condition in value_condition_pairs:
> if condition: # Or ``if condition and value``
> classes.append(value)
> return " ".join(classes)
>
> print css_classes([
> ("firstcolumn", i == 0),
> ("asc", request.get("o")),
> ]
>
> How would that be?
Very good. Only one thing :
print HTML.th("foobar", class_="")
return : <th class="">foobar</th>
I would like <th>foobar</th>.
Do you add "css_classes" feature in webhelpers repository ?
Regards,
Stephane
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