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[whatwg] introduction, plus some form input ideas

From: Kristof Zelechovski <giecrilj@stegny.2a.pl>
Date: Thu, 23 Oct 2008 09:33:14 +0200
Message-ID: <329A655E09ED44218EB434736193D45C@POCZTOWIEC>
The DOM work was fake, but if you insist, here you have some fake SAX work:
	Sub PrintOption(value, selected, text)
	Const tagName = "OPTION"
	Dim attrs(3)
	Attrs(0) = "value"
	Attrs(1) = value
	If value = selected Then Attrs(2) = "selected"
	Response.Write OpenTag(tagName, attrs)
	Response.Write EmitText(text)
	Response.Write CloseTag(tagName)
	End Sub
Of course, the right way is to use callbacks for potential attributes and
content; I have not done that for simplicity of exposition.  And in this
particular case you gain nothing by not using DOM because the fragment you
construct is very small anyway.
Chris


-----Original Message-----
From: timeless.bmo1@gmail.com [mailto:timeless.bmo1@gmail.com] On Behalf Of
timeless
Sent: Thursday, October 23, 2008 7:22 AM
To: giecrilj at stegny.2a.pl; whatwg at lists.whatwg.org
Subject: Re: [whatwg] introduction, plus some form input ideas

You're doing dom work, the code jonas wrote reminds me of perl which
typically doesn't generate a dom and then serialize it to send out
over the wire. Among other things serializing often requires the
entire document which means you can't build and incrementally send the
document over the wire. For documents i build, this would typically
kill my server or simply cause the connection to be reset because
processing takes too long.

On 10/22/08, Kristof Zelechovski <giecrilj at stegny.2a.pl> wrote:
> I do not find the other code significantly simpler than the present one.
> I would rather say:
>
> 	Sub printOption(value, selected, text)
> 	Dim Opt
> 	Set Opt = Option. Create(value, text)
> 	Opt. selected = (value = selected)
> 	Response.Write Opt.outerHTML
> 	End Sub
>
> 	For each rec in recset
> 	printOption rec.value, selectedValue, rec. text
> 	Next
>
> Problem solved.
> Chris
>
> -----Original Message-----
> From: whatwg-bounces at lists.whatwg.org
> [mailto:whatwg-bounces at lists.whatwg.org] On Behalf Of Jonas Sicking
> Sent: Wednesday, October 22, 2008 6:19 PM
> To: Ian Hickson
> Cc: whatwg at lists.whatwg.org; Ric Hardacre
> Subject: Re: [whatwg] introduction, plus some form input ideas
>
> Ian Hickson wrote:
>>> 2. select tag:
>>>    selectedindex="[num]"
>>>
>>> implicitly set the selected index, instead of having to parse all the
> option
>>> tags and insert a "selected" string, much easier to bind to server side
> data,
>>> an invalid value (such as -1 or greater than the number of option tags)
> would
>>> mean none are selected. this would obviously not apply to
> multiple-selects
>>
>> You can do this from script at the moment (setting the .selectedIndex
>> attribute). I haven't added it to the markup side yet. It doesn't seem to
>> add much other than convenience (you can already do this with
selected="",
>
>> as you noted). Adding features has a high cost, even for simple features
>> like this, and I'm not sure we can really justify the cost here.
>
> I actually think that something like this could be of high value to
authors.
>
> I've found myself many many times writing serverside code like this:
>
> selected_value = get_default_selected();
> list_of_records = get_records_from_db();
> print("<select name='hi'>");
> foreach (record in list_of_records) {
>    print("<option ");
>    if (record.value == selected_value) {
>      print("selected ");
>    }
>    print("value='" + record.value + "'>" + record.text +
>          "</option>");
> }
>
>
> while this works it is quite a pain. It would be much better if you
> could stick selected value in one place and then just dump all values.
> Such as:
>
> list_of_records = get_records_from_db();
> print("<select name='hi' value='" + get_default_selected() + "'>");
> foreach (record in list_of_records) {
>    print("<option value='" + record.value + "'>" + record.text +
>          "</option>");
> }
>
> So I think it works quite well as a convenience feature.
>
> We would have to define things like does the value content attribute
> change value when a new option is selected, or does it just act as a
> default value. In firefox different controls behave differently in this
> regard, I haven't yet checked what the html5 spec does.
>
> / Jonas
>
>

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Received on Thursday, 23 October 2008 00:33:14 UTC

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