Question

In TWikiPreferences I am trying to make variables to lighten the code user's have to input to achieve their desired look / feel of the pages they create. One problem I am having is inserting 2 different variables in another variable.

For example I am trying to make this variable called:

INDEX = %INDEX2%%INDEX3%

Which will then initialize the following two lines of code:

* Set INDEX2 = %TREEBROWSER{"file" title="[[%HOMETOPIC%][%INCLUDINGWEB% Web Home]]" shared="left"}%
* Set INDEX3 = %TREE{topic="%TOPIC%" formatting="outline" format="* [[$topic][$spacetopic]]" levelprefix="   " startlevel="1"}%

However, the variable

Warning: Can't find topic Support.DynaIndex will only execute the %INDEX3% variable when I view a page. I have tried putting %INDEX2% and %INDEX3% together and it simply does not work.

To get this to work now - I must enter on a page:

%INDEX2%
%INDEX3%

This makes me think that there is some issue with the formatting of my

%INDEX% = %INDEX2%%INDEX3% variable. 
Please let me know if you have any ideas on how to fix this. 

Your help is greatly appreciated!

Environment

-- BrianMahoney - 02 Aug 2007

Answer

While I can not completely explain your observation, I can at least supply some bits: Concatenation of variables "normally" just works. It is a really weird effect of execution order with plugin variables which hits you here. The variable %TREEBROWSER{...}% isn't just something which is replaced by something else, it operates on the following text, which always makes things difficult. I'm taking for granted that you wrote

   * Set INDEX = %INDEX2%%INDEX3%

instead of the bogus %INDEX% = INDEX2%%INDEX3% because I could reproduce the behaviour which you are describing.

I could get another unsatisfactory result by using the syntax which usually can be used to define a multiline variable:

   * Set INDEX = %INDEX2%
     %INDEX3%

Maybe someone with more knowledge about the internals of TreeBrowserPlugin can look at this, I'm totally lost at this code....

-- HaraldJoerg - 02 Aug 2007

Yes, thats correct harald I wrote

INDEX and not %INDEX% 

Sorry for the typo. Thank you again for all your efforts to help me!

-- BrianMahoney - 03 Aug 2007

Looks like it needs an actual newline character between TREEBROWSER and TREE. I was looking at some TWikiVariables to see if I could use one of them but could not find anything convenient maybe we need a %NEWLINE% variable.

-- StephaneLenclud - 08 Aug 2007

As a workaround you can use include instead of variables.

-- StephaneLenclud - 08 Aug 2007

Actually you can even define your include in a variable.

   * Set INDEX = %INCLUDE{"DynaIndex"}%

-- StephaneLenclud - 08 Aug 2007

Thanks I'll give it a try

-- BrianMahoney - 08 Aug 2007

Doesn't seem to work I get the same error that shows up on this page. Thanks for trying!

-- BrianMahoney - 08 Aug 2007

Sorry, closing this after more than 30 days of inactivity. Please feel free to reopen.

-- PeterThoeny - 02 Oct 2007

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