https://bugs.documentfoundation.org/show_bug.cgi?id=161509
Bug ID: 161509
Summary: Built-in Microsoft Word style names are remapped on
import but not on export
Product: LibreOffice
Version: 7.4.7.2 release
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Writer
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: d...@ecolingui.ca
Description:
See
https://github.com/python-openxml/python-docx/issues/494#issuecomment-2160619976
for some context.
LibreOffice will remap Microsoft Word's style names to its own when importing
DOCX. For example, "heading 1" becomes "Heading 1". The full table appears to
be in core/sw/source/writerfilter/dmapper/StyleSheetTable.cxx:1555
(StyleSheetTable::ConvertStyleName)
The comment in that function implies that the names will be converted back on
export. Unfortunately this is not entirely correct. They are remapped, but
not to the right names, for instance, "Heading 1" remains "Heading 1" and not
"heading 1". See core/sw/source/filter/ww8/styles.cxx (GetStiNames). Again
the comment does not match the code, it says "keep in sync with
StyleSheetTable::ConvertStyleName" but it is not in sync.
Surprisingly for a Microsoft product, the names are case-sensitive. This
doesn't cause any actual issues when loading the files in Word since the style
definitions are copied into the document. However it causes unexpected errors
when using third-party code such as the python-docx module that expect the
Microsoft internal names for built-in styles.
Steps to Reproduce:
1. Create a file in Microsoft Word with a "Heading 1"
2. Load the file in LibreOffice
3. Re-export the file as DOCX with LibreOffice
Actual Results:
word/styles.xml in the output has:
<w:style w:type="paragraph" w:styleId="Heading1">
<w:name w:val="Heading 1"/>
<w:basedOn w:val="Normal"/>
Expected Results:
It should have (as in the original Word file):
<w:style w:type="paragraph" w:styleId="Heading1">
<w:name w:val="heading 1"/>
<w:basedOn w:val="Normal"/>
Reproducible: Always
User Profile Reset: No
Additional Info:
Version: 7.4.7.2 / LibreOffice Community
Build ID: 40(Build:2)
CPU threads: 4; OS: Linux 6.1; UI render: default; VCL: gtk3
Locale: en-CA (en_CA.UTF-8); UI: en-US
Debian package version: 4:7.4.7-1+deb12u2
Calc: threaded
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