Re: misplaced cursor when a double-width character is near the lower-right corner

[sunnycemetery]

2021-01-28, 10:54, Benno Schulenberg:
> On the bottom row?  Near the right edge?  And with a double-width  
> character involved?  On what terminal?

Yes on all accounts.  This was with XTerm(362).

I created a dumb workaround in the form of a function named  
SecondHalfOfDoubleWidth that, given a window and y/x coordinate, simply  
returns true if the character at said coordinate represents the second  
half of a double-width character:

_⌄
ア

If any drawing operation is attempted from such a character, simply add  
one to the x-value (skipping the chopped-off double-width character)  
and draw as usual.  I have been unable to reproduce the error with the  
workaround in place.

See the attachment for the function.  Warning:  It really is dumb (but  
it works).

SecondHalfOfDoubleWidth.c
Description: Text document