I propose to add a "close" argument to the html helpers (gluon/html.py).
1. If there's no close argument, then the behavior is identical the
current code.
2. It's an error to specify close= for a self-closing tag (like <br /
>), or to give it a value other than True or False.
3. close=False suppresses the closing tag. The opening tag, attributes
and components (if any) are output normally.
4. close=True suppresses the opening tag and attributes. The
components (if any) and closing tag are output normally.
The general idea is to make it easier to use helpers when output is
being generated sequentially (as in welcome/views/layout.html, for
example).
While I assert that this change is generally useful, it will also
support a proposal I intend to make aimed at making it easier to
generate valid xhtml (or html) code (without breaking legacy
applications).
Usage, in the simplest case, would be something like this:
{{=BODY(close=False)}}
...
body content goes here
...
{{=BODY(close=True}}
This is meant to be an enabling feature only, with no enforcement
other than syntax. In particular, there would be no attempt to
prohibit a close without an open, or the like.
I don't expect that component args will typically be used in this mode
of operation, but I see no reason to prohibit them.
In the future, my plan is that HTML() would be smarter about
generating its DOCTYPE, and I want to encourage that use, which is
currently impractical (I think), since you either have to be prepared
with all the components, or else create and then edit (extensively)
the HTML object.
Discussion is welcome. I'd prefer a syntax along the lines of
BODY(open) and BODY(close), but I don't see a straightforward way of
doing it.
If there's no objection, I'll create a patch.
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