New subject: [Fedora-i18n-bugs] [Bug 1897782] ibus pinyin input with special characters like '/' will repeat itself non-stop and cause strange behaviours with background applications

14 Nov 2020


      https://bugzilla.redhat.com/show_bug.cgi?id=1897782
Bug ID: 1897782
           Summary: ibus pinyin input with special characters like '/'
                    will repeat itself non-stop and cause strange
                    behaviours with background applications
           Product: Fedora
           Version: 33
            Status: NEW
         Component: ibus-libpinyin
          Assignee: pwu@redhat.com
          Reporter: yemoran-2020@outlook.com
        QA Contact: extras-qa@fedoraproject.org
                CC: i18n-bugs@lists.fedoraproject.org,
                    petersen@redhat.com, pwu@redhat.com
  Target Milestone: ---
    Classification: Fedora
Description of problem:
In Fedora 33 Workstation, with a Chinese system language, when I try to input
with the ibus input (intelligent pinyin), and I pressed the slash key'/', then
the slash character '/' will automatically keep repeating itself, even if I
only pressed the slash key '/' once.
Not only this caused unwanted '/' to spam, but: 
1. Also prevents me from pressing alphabetical characters to use pinyin input
normally, unless I delete all my remaining characters to exit pinyin prompt and
start over;
2. Can possibly delete my already-saved text, in combination with
<Ctrl-Backspace>. 
It seems that I have completely lost control within the pinyin prompt. I have
met with other surprising conditions, though cannot be immediately reproduced
now, but I believe more combinations of inputs triggering different bugs will
be confirmed later.
Version-Release number of selected component (if applicable):
Any kind of version. I also tested with Fedora 32 Workstation, still have this
bug.
How reproducible:
Always
Steps to Reproduce:
1. Fetch any Fedora Workstation version, be it 32 or 33 or any updates applied.
2. Add Chinese input method 'Intelligent Pinyin' and switch to it
3. In GNOME(Wayland), open any GTK-based application, be it Firefox, GNOME
Terminal, gedit, Libreoffice, ... (take gedit as an example)
4. Input 你好，今天天气 (keypress: nihao<1>，jintian<1>) as a start up example, confirm
input use number key '1'. or keys like <Enter> or <Space>.
5. Input 怎么样/ (keypress: zenmy/）. Do not confirm immediately after 'zenmy', but
press '/' exactly once.
6. The '/' character is repeating itself within several hundred milliseconds.
7. Press <Ctrl-Backspace>. gedit will highlight "你好，今天天气" (with a lot of
trailing '/').
8. Press <Backspace> to delete these Chinese characters.
Actual results:
Not only '/' is repeating itself, but also I lost control to gedit and gedit
thinks you want to press '/' forever or even wants to delete my
already-confirmed characters before this input.
Expected results:
1. '/' Should not trigger anything, unless I have pressed this key and did not
release this key press (but I always release keys)
2. '/' Should not make me lost control over pinyin prompt to gedit
3. <Backspace> Should only delete pinyin alphabets in pinyin prompt panel, and
should not do anything to the background gedit texts, unless I have exited the
pinyin prompt panel (because I confirmed my input or have deleted every pinyin
alphabet in it)
Additional info:
1. I did not found this bug on Debian buster or Arch with latest updates.
Additionally, '/' did not even input a single character '/' in these
distributions, but I cannot confirm if this is the expected behaviour. In
Fedora 33 KDE, '/' did input a single character '/', but immediately stopped.
2. I didn't find this behaviour in qt-based applications (like Fedora Image
Writer or Octave) in GNOME, or any application in other desktop environments
(including KDE, or even GTK-based Cinnamon Desktop). This bug seems to only
occur on GTK-based applications on GNOME.
3. I can be very sure that this is not caused by something wrong with my
specific keyboard, because (a) Other distributions worked very well (b) Other
Fedora spins worked very well (c) Qt-based applications in GNOME worked very
well (d) GNOME X11 session worked very well (e) I replicated this bug on a
fresh install of Fedora 32 Workstation in another laptop of mine.
4. I guess other special characters (or keys) like '[', ']', '', '<Esc>',
'<Backspace>', etc. may trigger similar bugs, but I cannot confirm. '/' will
surely trigger this. ',' and '.' are used in pinyin input method to flip
candidate characters pages, so they doesn't trigger this bug. ' does not
trigger this bug (used in xi'an for 西安)
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[Fedora-i18n-bugs] [Bug 1897782] New: ibus pinyin input with special characters like '/' will repeat itself non-stop and cause strange behaviours with background applications