This is the presentation material of the LibreOffice conference https://events.documentfoundation.org/libocon2021/talk/AMTJXB/

1. State of CJK issues of LibreOffice,
2021 edition
Shinji Enoki
shinji.enoki@libreoffice.org
23 Sep. 2021

2. Agenda
●
What are CJK issues?
●
Typical LibreOffice CJK functions
●
CJK bugs status
●
Typical CJK issues
●
Japanese Comunity
●
Conclusion

3. 3
Shinji Enoki ( 榎真治 )
●
Member of LibreOffice Japanese Team (2011-)
●
Membership Committee Deputies of The Document
Foundation (2020-)
●
Activity: organizing events, building
communities, sometimes QA
●
Other communities:
– Vice-chairperson of Japan UNIX Society
– staff of KANSAI OPEN SOURCE
– etc.

4. 4
Live in Nishinomiya, Japan

5. Kobe
Osaka
Kyoto

6. What are CJK issues?

7. 7
What are CJK issues / bugs
●
CJK is an abbreviation for “Chinese-Japanese-
Korean”
●
Chinese, Japanese, and Korean are different
languages and different culture
●
But they have some common features
– Multibyte characters, vertical writing, etc.

8. 8
●
What are CJK issues / bugs (2)
●
Japanese:
●
Kanji (Chinese characters Japanese version) + Hiragana + Katakana
– 私は LibreOffice カンファレンスに参加します
●
Chinese:
●
Mainland: Simplified Chinese characters
– 我将参加 LibreOffice 会议
●
Taiwan: Traditional Chinese characters
– 我將參加 LibreOffice 會議
●
Korean
●
Hangul + Hanja (Chinese characters)
– 나는 LibreOffice 회의에 참석할 것입니다
It may be wrong because
it is machine translation

9. 9
●
What are CJK issues / bugs (3)
●
LibreOffice has many language-specific features
and issues, CJK issue is one of them
●
CJK issues happen when used in CJK's
environment

11. 11
TDF : Next Decade Manifesto
“To support the preservation of mother tongue by
encouraging people to translate,document, support,
and promote our office productivity tools in their
mother tongue”
●
I think this is important

12. 12
CJK users need to report / reproduce
CJK bugs
●
It is hard to notice / understand CJK bug unless
it is people of CJK
●
Many LibreOffice developers are not CJK people

13. Typical LibreOffice CJK functions

14. 14
Overview of CJK functions
●
Text Layout
– Vertical writing
– Phonetic guides (ruby)
– Line Composition
●
Multi byte character
●
Input methods
●
Calendar
●
…
●
CJK needs similar functionality, but its rules are different

15. 15
Text grid
●
For ex: 20 x 20
●
This sample is in
vertical writing
mode

16. 16
Text grid (2)
●
Intuitively understand volume and number of
characters
●
Professional and amateur writers used such
"Genkou-youshi" when writing on real paper
●
Number of characters can be seen with “Word
Count” function
– But some people like this style

17. Text grid (3)
●
Writer menu
[Format]>[Page
style]
●
Chose [Text Grid]
tab
●
Chose “Grid (lines
and characters)

18. 18
Text grid (4)
●
Left-to-right
mode

19. Text grid (5) : setting problem
Lines per page,
Characters per line,
Max.base text size,
Changing one affects
other values
For vertical writing, I
could not be set to 20x20
I used a website
template

20. 20
More CJK fanctions
Please check, last year's my slide
●
https://conference.libreoffice.org/assets/libocon2
020/Slides/enoki-cjk.pdf
Slideshare

21. 21
Reference: W3C Requirements documents
●
Requirements for Japanese Text Layout
– https://www.w3.org/TR/jlreq/
– “This document describes requirements for general Japanese layout realized with
technologies like CSS, SVG and XSL-FO. ”
●
Requirements for Chinese Text Layout 中文排版需求
– https://www.w3.org/TR/clreq/
– “This document was developed by people working in different areas, using both
Simplified and Traditional Chinese. ”
●
Requirements for Hangul Text Layout and Typography
– https://www.w3.org/TR/klreq/
●
Each documents are maintained. JA document is discussed on GitHub Issues

22. CJK bugs status

23. 23

24. Depends on CJK Meta issue #83066
Many issues have not been tracked by meta issue yet
2017/10 2018/9 2019/9 2020/9 2021/9
Depends
on:(All)
135 168 186 207 222
Open 59 73 73 80 78
Close 76 95 113 127 144

25. Asian Phonetic Guide(Ruby)
Meta issue : #50607

26. Text Grid Meta Issue #106568

27. Vertical and rotated text Meta issue #106045

28. Typical CJK issues

29. 29
Text with specific fonts (e.g., Noto Sans CJK SC),
at specific size, disappeared when page Grid
Line is enabled : Bug#144122
●
Characters are not
displayed depending
on the character size in
"Grid (lines only)"
mode
●
Not fixed

30. 30
Asian phonetic guide for Japanese does not
work properly if I change the default "base
text".: Bug#141466
●
delete a part of Base text and press Apply, it
becomes an incorrect string
●
Not fixed
delete

31. 31
Calc: Characters rotated when printed in Asian
layout mode of vertical writing : Bug#144378
●
Calc menu
[Format]-[Cells]
>>[Alignment] tab
>>Enable "Vertically stacked" and
"Asian layout mode"
●
Rotates when printed
●
Not fixed
●
There seems to be a similar
problem with vertical writing in
Writer

32. 32
EDITING: When full-width character punctuation mark
after the half-width character in vertical writing, the full-
width character punctuation mark is rotated: Bug#144003
●
In Writer vertical writing
mode,
●
Punctuation mark and
some rotates, if there is
an alphabet in front of it
●
3dot , 2dot reader change
●
Not fixed

33. 33
Demo

34. 34
Change / add some settings and data for
Japanese users
●
Nogata-san tried to improve usability

35. 35
Added traditional Japanese month
names
●
Add traditional Japanese month names to Calc's
sort list
●
Added to 7.2
●
Nogata-san created
a patch

36. 36
Added a cell format that mixes
Japanese and Western calendars
●
Users no longer have to create by simply
choosing this format
●
Added to 7.2
●
Nogata-san created
a patch

37. 37
Added label and business card paper data
●
Iwahashi-san checked and organized data of
business cards and label papers in Japan
– Added and modified based on the data created by
Kamadaki-san more than
10 years ago
●
Added to 7.2
●
Nogata-san created a patch

38. 38
Issues picked up at last year's conference
●
Introduced in my talk last year
●
Let's see after that

39. ODS exported by Excel with Asian phonetic
guide ​​is displayed as empty :Bug#129940
●
Ruby is not supported in Calc
●
Not only ruby, ruby ​
​
base text
●
is not displayed
●
content.xml of ODS file
ruby ​
​
include
ruby ​
​
not include
Fixed in 7.2/7.1.1 by Mark Hung
Calc does not support Asian phonetic
guide, but base test is displayed

40. When Skia is enabled in vertical writing, changing
the font scale changes the font size: Bug#136081
●
Setting to change Font width,
●
Font size has been changed
●
●
Skia rendering is enabled
●
on Windows only
●
●
Mark Hung and Luboš Luňák
●
created patch
●
Fiexd in 7.2
Correct behavior
Correct behavior

41. When Skia is on, the 3-point leader(dot-dot-
dot) is not working vertical writing
●
U+2026(3-point leader) is woring vertical writing, now
●
Not working: 7.0.6
●
Working: 7.1.6 / 7.2.0
Expected Results
Actual Results

42. Japanese community

43. 43
Japanese community
●
Japanese community contributors seem to have
been tired
– There may also be a pandemic effect
– The number of active members of Japanese team is very
low
●
However, contributions such as bug reports can be
seen from non Japanese core members
– I want to follow casual contributors

44. 44
●
I sometimes support bug reporting or bug triage
together in Online Hackfest
– However, the number of chances is still small
●
I'm looking for a way to reach potential
contributors

45. 45
Conclusion
●
Many CJK functions are implemented in
LibreOffice
●
CJK function is often broken
– Of course, mostly okay
●
I will to organize cjk issues and follow up casual
Japanese (cjk) contributors

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