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Posted to dev@tapestry.apache.org by "Norbert Sándor (JIRA)" <ta...@jakarta.apache.org> on 2006/07/17 20:35:18 UTC
[jira] Commented: (TAPESTRY-199) Addition of a simple way to get
component CSS stylesheets into an overall page
[ http://issues.apache.org/jira/browse/TAPESTRY-199?page=comments#action_12421687 ]
Norbert Sándor commented on TAPESTRY-199:
-----------------------------------------
I think the attached patch won't work with 4.1 because of TAPESTRY-1012.
I haven't tested, but my old 4.0 solution works similarly...
> Addition of a simple way to get component CSS stylesheets into an overall page
> ------------------------------------------------------------------------------
>
> Key: TAPESTRY-199
> URL: http://issues.apache.org/jira/browse/TAPESTRY-199
> Project: Tapestry
> Issue Type: Bug
> Components: Framework
> Affects Versions: 3.0, 4.0.2
> Environment: Operating System: All
> Platform: All
> Reporter: Scott Ellsworth
> Assigned To: Jesse Kuhnert
> Priority: Blocker
> Fix For: 4.1
>
> Attachments: patch.txt
>
>
> As I understand it, if a component requires a CSS stylesheet, you either have to put <style> commands
> in the generated HTML or you have to change the global page when you add the component.
> The first method means that the user would find it hard to override or change the component, as well
> as increased overhead and blowing out the browser cache.
> The second method breaks component isolation. Essentially, the main page for an app suddenly must
> be concerned about the styles used by various subcomponents.
> I believe we would be well served by enhancing the @Shell component to automatically pick up the
> stylesheets declared as needed in subcomponents. The situation is similar to how @Body picks up
> @Script components and tucks them into just one Javascript block.
> This would require a way for a component to register the stylesheets it uses. I would expect a tag in
> the jwc that sets the IAsset stylesheet/stylesheets, as then the top level component could just look for
> those assets in the contained items.
> I would expect, then, that the top level stylesheet/stylesheets passed into the @Shell component would
> be augmented silently. There is an argument for a "useComponentStylesheets" attribute that is by
> default true to control this behavior.
> The result would be that a user would not need to know that a component has added a stylesheet,
> because it would just work. It would be snazzy if the addition was smart enough to only include a
> stylesheet onec if there were multiple instances of the same component, or if there were two
> components using the same stylesheet.
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