On Mon, 2002-04-15 at 16:03, Jeffrey P Shell wrote:
> A pattern I've been using for text handling has migrated through a few
> refactorings to become a bag of Handlers. The main interfaces are::
>
> from Interface import Base, Attribute
> class IHandlerResult(Base):
> """
> IHandler objects return IHandlerResult objects, which are
> simple records that any text managing utility can use.
> """
> source = Attribute("The web-editable source code.")
> cooked = Attribute("Rendered (cooked) code, used for display")
> fullsource = Attribute(("The full source of the text, to be presented "
> "to non-web clients"))
> headers = Attribute("A mapping object of headers/values")
>
> class IHandler(Base):
> """\
> IHandler objects process text and return an IHandlerResult object.
> """
> def handle(text):
> """\
> Processes the incoming text and returns an IHandlerResult
> object.
> """
I'm not entirely clear on the interface -- what are Base and Attribute?
Oh... the new interface definition stuff?
I assume all the meta-data like title and such is just kept as headers?
> I have a couple of existing singletons for common uses -- editing text
> directly in a text area with little or no HTML knowledge, and uploading HTML
> exported from monsters like WordPerfect and other tools. They parse out the
> meta-tags and title tag (and put them in the headers result); they parse out
> the contents of the <body> tags. Then the "SafeHTMLHandler" uses an SGML
> parser coupled with a table of valid tags to rewrite the incoming code to
> something deemed as safe - basically it gets rid of a lot of the extra crap
> that Word, Wordperfect, Composer, etc, puts in. The original full source is
> kept (at the handler's clients discretion) for FTP/DAV editing without too
> much surprise on the authors part, while a <textarea> friendly version of
> the source (the parts between the body tags) is also kept for web based
> editing. And, there's the cooked content - basically this is where the
> handler transforms the input into HTML to be used within the standard look
> of the site. This is computed only on upload time.
This is very interesting... I've been doing stuff a little like this
with another project, converting from Word doc format to HTML. And I
find I've been working towards this with the Wiki stuff as well.
How do you deal with the conflict when person A edits a document via
Word, then person B edits the same document via textarea, and then
person A goes back? I assume the original Word style HTML document gets
junked (or archived) and person A edits HTML generated from person B's
edits? I guess that's fine as long as the Word style HTML document is a
convenience for the Word user, not a necessity.
You mentioned DAV, in what way are you using that? I've used mod_dav
successfully enough, but I haven't seen how you'd take control of it in
the same way I like to keep control over the other documents.
If you're willing to make your code public, I'd like to help flesh this
out into something more reusable/library like, and start adding in
different input/output types.
(I figure CMSKit is actually too ambitious -- rather, we'll have lots of
CMS-related modules which will, over time, make creating CMSes easier.
Actually, this is more document management, but it's all just
terminology)
Ian
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