On 7/5/2012 8:19 AM, Alan Altmark wrote:
On Tue, 3 Jul 2012 08:25:09 -0400, Shmuel Metz (Seymour J.)
<shmuel+...@patriot.net> wrote:
Steve Bireley <sbire...@rocketsoftware.com> said:
True that they are not unique to APL and is a code page issue.
However, some of the lines drawn on 3270 screens in many emulators
are drawn using an APL font instead of Unicode or some other code
page.
I doubt that it's an APL font; TEXT is more likely. Page 437 is more
likely than either.
Fidelity in copy/paste requires that both applications know what they're
doing
with the clipboard. When you place data on the clipboard, you have to tell
(assuming Windows in this case) about what you've written, and you can't lie. If
you tell the API the data is text (associated with a locale), then Windows will
be able to translate it.
And I would certainly expect the emulator's copy function to be intelligent
enough to recognize that APL data (code page 294) is implemented on a 3270 using
a mixture of two code pages: the base code page (e.g. 037) and code page 310,
with the 3270 Graphic Escape character prefixing each APL-specific character in
code page 310.
Default locale for Western Windows assumes code page 1252. But not even DOS
code page 437 has all of the APL characters in it, so the emulator must store
data on the clipboard in Unicode format.
The pasting application must then retrieve the data from the clipboard in
Unicode format. If the editor doesn't support Unicode, but only the SBCS
implicit in the locale settings, Windows will translate the Unicode to the
locale cod page, but you you will not get a good result.
In this case, if the emulator does not convert them to another
character set or code page when putting the text in the clipboard,
then the PC application receiving the data will display the
corresponding characters using the character set it has loaded.
That's an issue regardless of what code page it is using.
Generally speaking, full fidelity requires both the copying app and the
pasting app have to have a common frame of reference.
The TEXT setting, on the other hand, corresponds to a code page that I
believe
was used by ATMS, and was not tied to the TN print train (code page 264). I have
never been able to ferret out the code page used by ATMS.
Alan Altmark
IBM
Great exposition, Alan. Clear, coherent, helpful.
Thanks.
--
Kind regards,
-Steve Comstock
The Trainer's Friend, Inc.
303-355-2752
http://www.trainersfriend.com
* To get a good Return on your Investment, first make an investment!
+ Training your people is an excellent investment
* Try our tool for calculating your Return On Investment
for training dollars at
http://www.trainersfriend.com/ROI/roi.html
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
