tdf#108682 DOCX import: fix <w:spacing w:line=...> for negative values

I didn't find UI in Word to create

<w:spacing w:line="-260" w:lineRule="auto"/>

the equivalent markup when you set line spacing to exactly 13pt for new
documents is:

<w:spacing w:line="260" w:lineRule="exact"/>

The OOXML spec and Microsoft's implementer notes ([MS-OI29500]) is also
pretty silent about what a negative value means. However, if this markup
is converted to WW8 by Word, then the WW8 LPSD structure is like this
(as presented by doc-dumper):

<lspd type="LSPD" offset="5086">
<dyaLine value="0xfefc"/>
<fMultLinespace value="0x1"/>
</lspd>

For the 0xfefc value the [MS-DOC] spec clearly states that means the
type of the spacing is "exactly", with the value of 0x10000-0xfefc, i.e.
the same 260 twips.

Change-Id: I84b485d02dea49c610b6df2e06ccce03e1d29d21
Reviewed-on: https://gerrit.libreoffice.org/39091
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

0 files changed, 0 insertions, 0 deletions