487RE: [jasspa] Easy way to get exact position in buffer? (Motivation: get region size?)
- Dec 5, 2001How about:
!if &seq @y ""
The only issue that may arise from this is if it happens to be the very
first copy-region the yank-buffer may be empty and so it may still crash but
how likely is that??
P.S. The show-region is visible but not fixed when you first set the mark
(set-mark), so when you move the cursor the region shown changes with it.
Once you use copy-region the region is 'fixed' and thats what 0x2 of the
region flag is telling you, clear as mud.
> -----Original Message-----
> From: thundt [mailto:thundt@...]
> Sent: 05 December 2001 21:34
> To: firstname.lastname@example.org
> Subject: [jasspa] Easy way to get exact position in buffer? (Motivation:
> get region size?)
> What's an easy way to get the cursor's exact position (char #) within
> a buffer?
> The hard and messy way is to use buffer-info and then parse the
> $result string to pull out the char number:
> Line 1845/3955 Col 0.0 Char 78267/167172 (46%) Win Line 99/48 Col/0/0
> char = 0xA
> Or, how about an easy way to get the region's size?
> This is not reliable: (not even sure what it does -- 0x02 tells if
> the region is "fixed" -- what does that mean?)
> 0 show-region
> !if ¬ &band $result 0x02
> ml-write "[No region selected]"
> What I'm trying to do is write a safety wrapper around copy-region
> (and kill-region) to prevent them from copying empty regions (which
> crashes the Exceed X server application when it's set to auto-paste
> the clipboard -- yes, I believe it's a bug -- this is v6.2).
> Something along the lines of:
> define-macro my-copy-region
> set $x <get current location>
> set $y <get other location>
> !if &equal $x $y
> <complain and abort>
> Thanks for any ideas,
> -Tom Hundt
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