https://bugs.kde.org/show_bug.cgi?id=520990
Bug ID: 520990
Summary: xdg-desktop-portal-kde keyboard input conflicts with
CJK IME when using a virtual keyboard
Classification: Plasma
Product: xdg-desktop-portal-kde
Version First 6.6.5
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
Created attachment 192838
--> https://bugs.kde.org/attachment.cgi?id=192838&action=edit
keyboard layout
DESCRIPTION
This is a follow-up to bug 489021, reporting on behalf of @minortex.
The previous bug 489021 fixed keysym translation through xdg-desktop-portal-kde
with non-standard keyboard layouts, which was broken with the WIP KeePassXC
Wayland Autotype and with KDE Connect, possibly among others. But more work is
still needed for correct IME/CJK support.
The original report for this issue is at
https://github.com/keepassxreboot/keepassxc/pull/13359#issuecomment-4508021701
:
> Some problems occured when I use the fcitx5 input method.
> This affects CJK users first, but the same class of issue may affect other
> IMEs,
> non-US layouts, or virtual keyboard setups.
>
> J5KZUJ`z24dk@VdLo%S_r # original password
> j%kZUJ~z24dk2VDlO5S_R # keepassxc inputted
>
> Confirmed that keyboard-us layout is selected. It looks like fcitx5 receives
> the
> virtual keyboard events and corrupts or delays modifier state. Besides, after
> the auto-type operation, my shift key is pressed but not released properly.
>
> I tried Fcitx5 wayland launcher or Fcitx5 in Virtual Keyboard of KDE settings,
> neither works.
> When I switch to none, it works, so seem to be a IM compatibility problem.
See attachments.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.6.5
KDE Frameworks Version: 6.26.0
Qt Version: 6.11.1
Kernel Version: 7.0.9-zen1-1-zen (64-bit)
Graphics Platform: Wayland
ADDITIONAL INFORMATION
https://github.com/keepassxreboot/keepassxc/pull/13359#issuecomment-4513701330
:
> I tested three entirely different virtual keyboard backends in KDE system
> settings:
> 1. fcitx5 -> bug recurs.
> 2. ibus -> bug recurs.
> 3. plasma virtual keyboard (KDE's native osk) -> bug recurs.
>
> Since the same modifier/Shift corruption happens across all three frameworks,
> this
> is definitively a KDE/KWin/Portal bug, not an fcitx5 issue.
https://github.com/keepassxreboot/keepassxc/pull/13359#issuecomment-4524478681
:
> (The previous bug 489021) solved the problem that European/American keyboard
> with different key places. But they don't take virtual keyboard into
> consideration.
>
> It's necessary to explain how the IME works:
>
> 1. user types raw alphanumeric keys to form an input sequence representing
> the pronunciation(e.g. Pinyin)
> 2. the IME intercepts these keys and buffers them into a pre-edit string.
> 3. the IME dynamically maps the input sequence to matching ideographs and
> displays them in a floating candidate window.
> 4. the user types a number key to select the intended ideograph from the
> candidates.
> 5. finally the IME commits the selected text, sending the actual ideographs
> into the active text field.
>
> In KDE, simulating keyboard input will conflict with IME, because IME will
> process
> the original key input, which causes the problem.
The user implemented a workaround using a helper script to temporarily disable
IME:
https://github.com/keepassxreboot/keepassxc/pull/13359#issuecomment-4516791073
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