What I do to resolve this is the following:
Each component which wants to "contribute" a css, implements an
Interface named IStyleable.
The border goes through all components of the page and checks them.
For each one which implements the IStyleable interface (which is only a
marker, and has no methods to implement) it reaches for the "css" asset,
and adds it to a set of assets. (see code at the end)
This whole thing happens only once per page instance, so performance is
not an issue.
in the border I define
<html jwcid="@Shell" stylesheets="ognl:stylesheets" ...>
Thats it. Works very nice for me.
Cheers,
Ron
===================================
public class Border extends BaseComponent implements IStyleable {
private IAsset[] _stylesheets;
public IAsset[] getStylesheets() {
if (_stylesheets == null) {
Set s = new HashSet();
getStylesheets(getPage(),s);
_stylesheets = new IAsset[s.size()];
System.arraycopy(s.toArray(),0,_stylesheets,0,s.size());
}
return _stylesheets;
}
private void getStylesheets(IComponent c, Set s) {
if (c instanceof IStyleable)
addStylesheet(c,s);
for (Object cc : c.getComponents().values())
getStylesheets((IComponent)cc, s);
}
private void addStylesheet(IComponent s, Set set) {
IAsset asset = s.getAsset("css");
if (!set.contains(asset))
set.add(asset);
}
}
ציטוט Tomáš Drenčák:
Hi,
I'd like to ask how can I include a css file into a component or even
a page. I use own Border component with Shell. Stylesheets could be
imported there, but what if I want to include css specific to page or
component?
thanks
tomas
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