22 Aug
2013
22 Aug
'13
3:21 p.m.
On Thu, Aug 22, 2013 at 3:33 PM, Valdis Vītoliņš <valdis.vitolins(a)odo.lv> wrote:
I'm trying to move all velocity macro
customizations from files to the
database according to
http://platform.xwiki.org/xwiki/bin/view/DevGuide/SkinExtensionsTutorial
Though I can't find out syntax and execution rules (e.g. order) for
parsed entries.
E.g. to implement different styles for anonymous and
logged in users for
XWiki.StyleSheetExtension parsed code (how Velocity can decide which is
macro and whic is CSS id?):
Velocity doesn't know about CSS. Everything that looks like a Velocity
macro or variable is evaluated. Of course, undefined macros and
variables are printed as is so in your example below you'll get
#xwikicontent after the Velocity code is evaluated, unless you have a
'xwikicontent' Velocity macro defined.
#if($isGuest)
#xwikicontent {
background-color: blue;
}
#else
#xwikicontent {
background-color: red;
}
#end
Similarly, what should be right way to show alert for
XWiki.JavaScriptExtension parsed code:
alert($isGuest);
Velocity is a template language so when the Velocity code is evaluated
the Velocity variables are simply substituted in the template by their
values. So could get
alert(false);
This works because 'false' is a literal boolean value in JavaScript.
But if your code was
alert($xcontext.user);
you could get
alert(mflorea);
which will throw an exception unless 'mflorea' is a JavaScript
variable previously defined. Obviously you need to wrap the value in
quotes.
alert('$xcontext.user');
But this is not enough, because the value coming from Velocity can
contain characters that are not allowed in a JavaScript string
literal. So safest is to write:
alert('$escapetool.javascript($xcontext.user)');
Hope this helps,
Marius
Thanks!
Valdis
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