text replacement

[schmitte]

I want to make some text replacement in a postscript job. How can I do this. for example, I have this:

%!PS

/Courier 24 selectfont
10 600 moveto (This is a test) show
10 500 moveto (%%redcolor%%) show
10 400 moveto (This is a color changing test) show
10 300 moveto (This is a test) show
showpage

What I would like to do is the replacement of the string %%redcolor%% with this:
0.83 0.00 0.00 setrgbcolor to change the color of the text.

Thank's in advance for your help

 

[sburleson]

I think what you want is to be able to define a dictionary entry redcolor so you can switch to red when necessary. For instance, try this:

%!PS

/redcolor { 0.83 0.00 0.00 setrgbcolor } def
 
/Courier 24 selectfont
10 600 moveto (This is a test) show
%10 500 moveto (%%redcolor%%) show 
%I do not understand why you are moving to 10 500 
%if you just wanted to switch the color, but I may
%misunderstand what you are trying to do
redcolor
10 400 moveto (This is a color changing test) show
10 300 moveto (This is a test) show
showpage

In this example, "This is a color changing test" and the second "This is a test" will both show as red since the color has changed. If you just want the "color changing" line to print red, place a gsave before redcolor and a grestore after show, or define a "blackcolor" as a similiar entry and place blackcolor after the show.

The redcolor can then be modified to whatever shade you need and used whereever you wish throughout the document.