Bug 1585549

Summary: [zh_CN] Chinese candidates still show on screen when switch Chinese and Einglish via clicking Shift in some applications.
Product: [Fedora] Fedora Reporter: Lijun Li <lijli>
Component: ibus-libpinyinAssignee: Peng Wu <pwu>
Status: CLOSED NEXTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 28CC: bbarve, i18n-bugs, petersen, pnemade, pwu
Target Milestone: ---Keywords: i18n
Target Release: ---   
Hardware: x86_64   
OS: Linux   
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Last Closed: 2019-04-09 14:25:05 UTC Type: Bug
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[zh_CN]Chinese candidates still show on screen when switch Chinese and Einglish via clicking Shift in some applications. none

Description Lijun Li 2018-06-04 03:57:39 UTC 
Description of problem:
[zh_CN]Chinese candidates still show on screen when switch Chinese and Einglish via clicking Shift in some applications.

Version-Release number of selected component (if applicable):
Fedora28

How reproducible:
100%

Steps to Reproduce:
1. Open/type on terminal/gedit/evolution/Type to search...
2. Type with Chinese(Intelligent Pinyin) input method.
3. Type with Chinese and click Shift from keyboard to switch to English. 

Actual results:
[zh_CN]Chinese candidates still show on screen when switch Chinese and Einglish via clicking Shift in some applications.
But when move focus to other applications/place, the Chinese candidate is disappered.

Expected results:
The candidate should not be showed up when switch Chinese/English via clicking Shift.

Additional info:
Please see the attached screen-shot.
Comment 1 Lijun Li 2018-06-04 03:58:40 UTC 
Created attachment 1447279 [details]
[zh_CN]Chinese candidates still show on screen when switch Chinese and Einglish via clicking Shift in some applications.
Comment 2 Lijun Li 2018-06-04 03:59:46 UTC 
By the way, it's not produced on Firefox.
Comment 3 Peng Wu 2018-06-04 06:27:30 UTC 
This maybe a bug in gtk3, mutter and gnome-shell.

gnome-shell with wayland seems doesn't support 'show-preedit-text' and 'hide-preedit-text' signals.

Potential fixes:
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/113
Comment 4 Bhushan Barve 2019-03-28 08:44:11 UTC 
Checked with F30 build on both wayland and x11 desktop.
Now the candidate is not shown when switched from Chinese to english by clicking shift.
Marking it as verified. Please re-open if required.