[Seaside] Handling and avoiding nested forms
michel.bany at gmail.com
Mon Aug 25 06:56:03 UTC 2008
Package SeasideAssistants in squeaksource.com/Seaside does exactly
what you are looking for.
It also detects duplicate id= attributes.
See below the VisualWorks package comment that provides some usage
Unfortunately, it is for Seaside 2.7 and has not been updated for
2.8. As a matter of fact it doesn't even load in a Seaside 2.8 image.
SeasideAssistants for VisualWorks
Among other things, proper compliance to XHTML implies
(1) Form tags are not be nested,
(2) The id attribute values are unique.
The later is especially important when using AJAX techniques where it
elements that are manipulated.
In complex constructs that are using many nested components generated
by many different rendering methods from many different classes, it
may be difficult to ensure XHTML compliance. As a consequence, nested
form tags or duplicate id attribute values are likely to occur.
This package slightly modifies Seaside so that nested form tags and
duplicate id attribute values are producing an error. This makes it
possible to immediately and precisely spot where to look in the
The exact behavior is decided in the following methods :
These methods are available in classes WAHtmlRenderer and
When this package is loaded the default behavior is the following:
(1) Duplicate id attribute values are allowed
(#shouldRaiseDuplicateCssIdErrors answers false)
(2) Nested form tags are allowed (#shouldRaiseNestedFormErrors
(3) Nested form tags are silently discarded
(#shouldSilentlyDiscardNestedForms answers true)
This default behavior ensures that an existing Seaside application
does not break.
To enable a different behavior, there are two possibilities.
(1) Modifies any of the six methods listed above
(2) Subclass WAHtmlRenderer or WARenderCanvas and re-implement
methods as needed
Contributors: Michel Bany
Keywords: Web, Continuations, HTML, XHTML, CSS, Internet, Squeak
Port from SeasideAssistants-mb.12.mcz 24 July 2007 3:13:27 pm
On Aug 24, 2008, at 10:08 AM, Hwee-Boon Yar wrote:
> Has anyone develop a good approach to handling and/or avoid nested
> seaside mailing list
> seaside at lists.squeakfoundation.org
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