See 
http://jira.xwiki.org/browse/XWIKI-8613 . It's not easy to
implement a generic solution (the WYSIWYG editor needs more
information from the Rendering / server side about the macro parameter
type, not just it's Java type as it gets now, in order to know which
widget to display as input). As for a custom solution, you need to
modify the editor code, but that's not trivial either..
On Wed, Sep 11, 2013 at 9:19 AM, shashidhar patil
<1.more.shashidhar(a)gmail.com> wrote:
  Hey,
 I have created a macro which helps me to point to another page. I would
 like to implement a feature where in the WYSIWYG editor mode in the add
 macro tab, I wanted to be able to type the page name in a search box
 instead of a normal text box. This way the user can search for a given page
 and it could directly help to validate the page.
 Thanks and Regards,
 Shashidhar P
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