https://bugs.documentfoundation.org/show_bug.cgi?id=163912
Bug ID: 163912
Summary: Remove static conversion for the ch field unit
Product: LibreOffice
Version: Inherited From OOo
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: UI
Assignee: [email protected]
Reporter: [email protected]
Description:
Additional context for this bug is provided in bug 36709.
Some office suites provide a ch/char field unit, which allows users to
denominate paragraph indentation as the multiple of the width of an ideographic
character in the current font. LibreOffice also exposes a ch/char field unit.
Unlike other office suites, however, this unit is not relative to the current
font. When a value in chars is entered into a metric field, a hard-coded
conversion is applied (210 twips ~= the advance of a CJK ideographic character
in a 10.5 pt font).
Our hard-coded conversion conflicts with the user expectation that indentation
denominated in characters should refer to the characters they are using, rather
than the characters in some different font or font size.
Bug 36709 added support for a proper font-relative character-based indentation,
using the CSS unit 'ic' rather than 'ch'. We now have the opportunity to
mitigate some confusion. At minimum, we should remove the current hard-coded
conversion and treat 'ch' as an alias for 'ic' in supported contexts.
Steps to Reproduce:
1. Set the font size for some CJK text to 20
2. Set the first-line indent to '5 ch'
3. Note that the text is offset less than 5 characters
4. Set the font size to 10.5
5. The text is now offset ~5 characters
4. Set the indent to '5 ic'
5. Note that the text is offset 5 characters
6. Increase the font size to 20
7. Note that the text is still offset 5 characters
Actual Results:
The applied indentation for 'ch' is not font-relative
Expected Results:
The applied indentation should be font-relative
Reproducible: Always
User Profile Reset: No
Additional Info:
Version: 25.2.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: d18fbc0c20180f6856e9e47eaa97e3763dd4d8e9
CPU threads: 32; OS: Linux 6.8; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded
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