New JS function for x-counters handling

[jtripoz]

Using legacy coding, it's possible to pick the x-counters from another stream.

For example, 

formatting.evaluateShowString('="@vData:Main"x(5)x(5)');

will transfer into cuurent stream x(5) counter the value of 'Data:Main' stream's x-counter x(5) at the begging of the current page.

Even if it's probably already possible using display, I think that a core fonction would be interesting, looking like this:

formatting.getCounters(streamName, counters, relativePage)

where:

• streamName : name of the stream to import counter(s) from. If does not exist, do nothing
• counters: un number / array of number. if null => import all. If number: import this counter. If array of numbers: import the corresponding counters, if empty array just do nothing !
• relativePage, default : 0 : pick counters value from relative page, if 0 : current.

 For example, formatting.getCounters("strm0",10,1) would be similar to this:

giving <?show ="@vstrm0"1x(10)x(10)>.

[GarethOakes]

Jacques, I think you could already implement your own getCounters() function using fdStreamPos counters/stringCounters. Besides the convenience of what you suggest, is there a novel concept here that I'm missing?

[jtripoz]

Yes of course, I could implement it quite easily but I just think that a core function would be useful for everyone !