Indicator-Conditioned DSPATR and COLOR

Supported RPG Features

A field's display attributes and colour may be conditioned by an option indicator, written on a keyword line beneath the field with the indicator in DDS columns 7-16:

     A            CUSTNO         6  0B  5 20
     A  60                                    DSPATR(RI)
     A  60                                    COLOR(RED)

CUSTNO renders in reverse image and red only while *IN60 is on; with the indicator off it renders exactly as an unconditioned field would. The negated form (N60) applies the attribute while the indicator is off.

Details:

• Each entry is gated by its own indicator, so a field may carry several attributes that come and go independently.
• Several attributes on one conditioned line (DSPATR(RI UL)) share that line's indicator.
• A conditioned attribute is added to whatever unconditional DSPATR the field declares; it does not replace it.
• When more than one conditioned COLOR is active at once, the last one written wins - the same way the DDS compiler resolves the attribute byte.

Attributes written without a conditioning indicator - in the field's own keyword area or on a plain continuation line - are unconditional and always in effect.