Hello Elias,

that's OK.

I just tried different font setting in Emacs (hoping for some blinking light bulb:).

*M-x gnu-apl-mode* does not switch the keyboard. I still need to change it via the tray keyboard layout selection. btw. after the last system update the ⍝-entry (and others) in emacs works fine.

The round trip: emacs copy / cmd line paste / cmd line copy / emacs paste is consistent.
The cmd line characters have "half space, char, half space".

in apl session try:

      ⎕AV[168 171 182 229 230 231 232 233 234 238 251]
⍚⍜⍟⍝⍲⍴⍱⌽⊖⍉⍫
      11 ⍴ '|'
|||||||||||

The composed characters take more space. line editing is garbled if the characters are included.


Best Regards
Hans-Peter





Am 02.06.21 um 13:25 schrieb Elias Mårtenson:
When using Emacs with GNU APL, you should use gnu-apl-mode. You can download it from MELPA and you start it using M-x gnu-apl.

https://github.com/lokedhs/gnu-apl-mode <https://github.com/lokedhs/gnu-apl-mode>

This should hopefully fix your problems.

Regards,
Elias

On Wed, 2 Jun 2021 at 17:23, Hans-Peter Sorge <hanspeterso...@netscape.net <mailto:hanspeterso...@netscape.net>> wrote:

    Hi,

    I am on Fedora 34 now (apl SVN: 1198:1472M)

    The apl font partially fails to work with keyboard layout apl.

    The "over strike characters" ⌽⍉⍟⍝⍱⍲ ,when entered in a terminal,
    appear in half....
    The left half of the character is being displayed when entered.
    The right half appears when space bar is being pressed.
    Anny further character entered is being offset by one.

    That is  ⌽[space]ABC  -> ends up as ⌽BC where space bar "overlays"
    character A!
    The Apl-Session, terminal, emacs, vi are affected too. slikedid,
    Firefox are OK.

    If changing the layout via *setxkbmap -layout "apl"* I get ����
    instead of ⌽⍉⍟⍝.
    The � are being displayed the same way as described above: Left
    half character, [SPACEBAR] right half of the character.

    I installed apl from the repository to verify the behavior - that
    segfaults.

    The font-manager shows
    ⍝  APL FUNCTIONAL SYMBOL UP SHOE JOT   U+235D
    So there is nothing special about this and 'normal' UTF-8 characters.

    The terminal font is set to *latarcyrheb-sun16* in
    */etc/voconsole.conf.*

    Changing the terminal font to either Unifont-APL8x16-12.1.02 or
    NotoSansMono did not help.

    Emacs:
    After some 'fiddling around' font changes with emacs *M-x
    menu-set-font* will display ⍝ in one go,
    Char ⍝ will be displayed for different fonts - even if the
    font-manager does not show it.
    Char ⍝ with font NotoSansMono selected will be displayed in one
    shot but with additional spacing to the left and right.
    Char ⍝ with Unifont selected will be displayed w/o spacing.
    ( The console fonts and the content of *menu-set-font* are
    different...)

    Hopefully some one has an idea where / how to dig deeper into the
    problem.

    Best Regards
    Hans-Peter



    Is there / some where an experiment going on to 'improve'
    character composition?




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