[Libreoffice-bugs] [Bug 107487] New: Unicode ExtB+ chars do not use fallback font correctly in Writer

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=107487

            Bug ID: 107487
           Summary: Unicode ExtB+ chars do not use fallback font correctly
                    in Writer
           Product: LibreOffice
           Version: 5.3.2.2 release
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: danny0838+bz at gmail.com

Description:
Some fonts are 

Steps to Reproduce:
1.Open a new .odt file in Writer. Make sure the font is set to "新細明體". (figure
1)
2.Paste in "大黃䗪蟲丸狐𧌒䒜𧀬" using plain text format. (figure 2)

Actual Results:  
The chars are displayed in a gibberish way. (figure 3)

Expected Results:
The chars should be displayed correctly.


Reproducible: Always

User Profile Reset: No

Additional Info:
Font "新細明體" has code points for "大黃䗪蟲丸狐"、"䒜", and font "新細明體-ExtB" has code
points for "𧌒" and "𧀬".

In Microsoft Word, if the font is set to "新細明體" and "大黃䗪蟲丸狐𧌒䒜𧀬" is pasted, "𧌒"
and "𧀬" will be rendered using font "新細明體-ExtB" while other chars are rendered
using font "新細明體". If the font is set to "新細明體-ExtB" and "大黃䗪蟲丸狐𧌒䒜𧀬" is pasted,
"𧌒" and "𧀬" will be rendered using font "新細明體-ExtB" while other chars are
rendered using font "新細明體".

In Writer, if the font is set to "新細明體" and "大黃䗪蟲丸狐𧌒䒜𧀬" is pasted, "𧌒" and "𧀬"
are tried to be rendered using font "新細明體", causing a poor rendering. If the
font is set to "新細明體-ExtB" and "大黃䗪蟲丸狐𧌒䒜𧀬" is pasted, "𧌒" and "𧀬" will be
rendered using font "新細明體-ExtB" while other chars are rendered using the
default font (on Windows 7 it's usually "微軟正黑體"), causing an inconsistent
rendering (figure 4).


Related issues see:
https://bugs.documentfoundation.org/show_bug.cgi?id=96457


User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:53.0) Gecko/20100101
Firefox/53.0

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