[Rd] Warning for dropped text with devices that don't support clipping

Sebastian Fischmeister sfischme at uwaterloo.ca
Sun Jan 25 03:19:32 CET 2009


   Without feedback, it's hard to understand why text does not show up  
in the output—especially, if it shows up on one device but not on  
another. I suggest adding a warning message when text gets ignored,  
because the device doesn't support clipping (see the attached patch).  
Unfortunately, I cannot add a test, because warnings are sent to  
stderr and not stdout; however, the attached R script shows the warning.

A point for discussion is: how often does the described case occur and  
will a warning message confuse the user? For example, warnings as text  
gets completely clipped (engine.c:1417) will offend users, because  
they happen too often. But then again, all devices will most likely  
omit the text in this case. This is does not hold for the described  


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