Question for scripting gurus: GREP search, change case make Smallcaps

Question

I have no knowledge of scripting at all, but this question keeps coming up during training sessions: is it possible to (java)script this:
- Do a GREP search \u\u+
- Change case to lowercase
- Apply SmallCaps (or: apply character style)
this would allow to search for acronyms and change them to smallcaps (or, even better: apply a character style with small caps and tracking)
I know it is easy for OpenType smallcaps (do a GREP search, change to OT smallcaps) but this doesn't really change case. And some fonts used aren't OT.
Anyone?
Would be VERY apreciated!!

Answer 1

But Harbs is a seasoned scripter who knows he'll get flamed if one of his scripts "just does not work" ;)
Well, now that you mention it, the script is not really foolproof. It's a quick and dirty script which I threw together very quickly. It's missing any error checking, some of the variables global, and it's not in a private namespace. These are all things which could cause it to "just not work" ;-)
Here's a more foolproof construct... (and it'll work on the current story if selected, or the whole document if there's no story selected) It will create a new character style if one does not exist and work on character styles within style groups as well. I wrapped the whole script in an anonymous function to give it a unique namespace as well.
(function()
if(app.documents.length==0){return}
var doc=app.documents[0];
// Change the following to your style name!
var character_style_name = 'Small Caps';
try{var range = app.selection[0].parentStory}
catch (err){var range = doc}
//comment out next line if you do not want styles.
var charStyle = GetCharacterStyle(character_style_name,doc);
app.findGrepPreferences = null;
app.findGrepPreferences.findWhat="\\u\\u+";
var finds=range.findGrep();
for (var i=0;i<finds.length;i++){
finds[i].changecase(ChangecaseMode.lowercase);
//comment out next line if you do not want styles.
finds[i].applyCharacterStyle (charStyle)
//uncomment next line if you do not want styles.
//finds[i].capitalization=Capitalization.smallCaps;
function GetCharacterStyle(styleName,doc){
var charStyles=doc.allCharacterStyles;
for(var i=0;i<charStyles.length;i++){
  if(charStyles[i].name==styleName){
   return charStyles[i];
return doc.characterStyles.add({name:styleName,capitalization:Capitalization.smallCaps});