Michael Huebner wrote:
>
> One problem:
> Now I tried to display the concatenation of the values of attributes. I
> wrote in my css-file:
> set-attribute-button(attribute, user, text,
> xpath("id(@relation-role)/concat(@name, ' ', @id)"))
> but on opening the xml-file I got an error
> .../ucx.css:277:124: not supported value for property "content":
> cannot parse XPath expression "id(@object)/concat(@name, ' ', @id)":
> expected node test
>
> How can I get the concatenation of the values of attributes?
The XPath expression is really invalid. You need to rewrite it as follows:
---
set-attribute-button(
attribute, user,
text, xpath("concat(id(@relation-role)/@name,
' ',id(@relation-role)/@id)"))
---
>
> Another problem:
> I don't know how I can use xpath to filter the elements to be displayed
> in the selection dialog of a "set-attribute-button()".
>
> (B.t.w. the documentation page for "set-attribute-button()" in
> docs/csssupport/ch05s26.html is very short and has only the example:
>
> set-attribute-button(attribute, for,
> unset-attribute, yes,
> icon, icon(pop-right));
>
> for the general syntax:
>
> *set-attribute-button*(*attribute*, /attribute_name/, /key/, /value,/
> ..., /key/, /value/)
>
> I think that it would be good to provide on this documentation page an
> example for the existing keys "text" and "color", too.)
>
> My proposal is to add a key "selection" where the value is an xpath
> expression that denotes the elements that can be selected, e.g.
> "//person" to select all elements of type "person".
> The default value would be "//*".
>
> My proposal is also to add a key "list-item-display" where the value is
> a string (constructed from xpath expressions) that describes the
> appearance of the items in the selection list. E.g. if the "selection"
> key is set to ""//person", the "list-item-display" could be
>
> "concat(@firstname, ' ', @lastname)"
>
>
> The default value for "list-item-display" would be the attribute that
> is of type ID in the referenced element.
>
> If elements of different types (e.g. person and group) should be
> selectable, this could be achieved by having multiple entries of the
> keys, e.g.
>
> set-attribute-button(attribute, user,
> selection, "//person",
> list-item-display, "concat(@firstname, ' ', @lastname)",
> selection, "//group",
> list-item-display, "@name")
>
> Or is there already a way to achieve the desired behavior?
Sorry but there is no way to do this without programming in Java.
You need to code a CSS style extension in Java -- see
http://www.xmlmind.com/xmleditor/_distrib/docs/dev/ar01s07.html#solution4
-- in order to get exactly what you want.
