https://bugs.kde.org/show_bug.cgi?id=500203
Bug ID: 500203
Summary: Pasting Unicode text in clipboard history that was
previously copied from Firefox would output incorrect
characters
Classification: Plasma
Product: plasmashell
Version: 6.3.0
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Clipboard widget & pop-up
Assignee: plasma-b...@kde.org
Reporter: yule2...@live.com
Target Milestone: 1.0
SUMMARY
When pasting Unicode (non-ANSI/ASCII) characters from the clipboard history,
the pasted output appears with such characters being replaced with a black
diamond with a question mark or "\uXXXX".
STEPS TO REPRODUCE
1. Copy a snippet of non-Latin text or symbols from a webpage in Firefox (e.g.,
https://gist.github.com/StevenACoffman/a5f6f682d94e38ed804182dc2693ed4b)
2. Do one of the following: (a) Copy another piece of text from any app or (b)
open the clipboard history popup and select an item other than the top one on
the list
4. In the clipboard history popup, select the second item from the top of the
list
5. Paste to a text box in any app
OBSERVED RESULT
The output would have Unicode characters replaced with either a � or something
like "\u0105". However, those characters appear fine in both the clipboard
history popup and the database file containing the clipboard items.
Using the contents of the above link as an example, "а ạ ą ä à á ą" from the
clipboard history would be pasted as "\u0430 \u1ea1 \u0105 � � � \u0105"
EXPECTED RESULT
The pasted text would have characters exactly as displayed in the clipboard
history popup, with or without formatting depending on the app.
SOFTWARE/OS VERSIONS
Operating System: EndeavourOS
KDE Plasma Version: 6.3.0
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.2
Graphics Platform: Wayland
ADDITIONAL INFORMATION
This behavior started in Plasma 6.3.0; I never encountered this in prior
versions.
Sometimes, if you paste the history item to a textbox in Firefox, it would
output nothing.
I found that in the new SQLite-based database containing the clipboard items
(mine was located at ~/.local/share/klipper/history3.sqlite), the affected
items would have something like this in the mimetype column:
```
text/html,text/_moz_htmlcontext,text/_moz_htmlinfo,text/plain;charset=utf-8,UTF8_STRING,COMPOUND_TEXT,TEXT,text/plain,STRING,text/plain;charset=ANSI_X3.4-1968,text/x-moz-url-priv
```
A workaround is to edit the affected item by adding/removing characters from
within the clipboard history popup. This changes the MIME type for that
specific item in the database to "text/plain,text/plain;charset=utf-8", causing
Unicode characters in that snippet to be pasted with the correct characters at
the expense of any formatting being lost.
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