editeng, svx: introduce ability to clip vertical text overflow

Introduces editeng text property TextClipVerticalOverflow.

Which when set causes vertical text that is overflown out of a
frame/shape truncated. (Only when text isn't being edited)

This is implemented as two steps:
(if text overflows)
1 - Vertical adjust is forced to top.
(Forcing vert adjust to top isn't the desired behavior normally,
but good enough for a first cut I'd say.)
-> The desired behavior would be after the overflown text is
truncated, doing a vertical adjust (of center/bottom/top) on
that piece of text.

2 - ClipRange is set to the height of the frame/shape.

This appears to work with different text directions too (vertical
etc.).

Change-Id: I697715a7d28bde94a6650609b16505ffab92173f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/150106
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/editeng/unoprnms.hxx b/include/editeng/unoprnms.hxx
index a321e54e5a73..1ca19c3f5121 100644
--- a/include/editeng/unoprnms.hxx
+++ b/include/editeng/unoprnms.hxx
@@ -124,6 +124,7 @@ inline constexpr OUStringLiteral UNO_NAME_TEXT_WRITINGMODE = u"TextWritingMode";
 inline constexpr OUStringLiteral UNO_NAME_TEXT_FONTINDEPENDENTLINESPACING = u"FontIndependentLineSpacing";
 inline constexpr OUStringLiteral UNO_NAME_TEXT_WORDWRAP = u"TextWordWrap";
 inline constexpr OUStringLiteral UNO_NAME_TEXT_CHAINNEXTNAME = u"TextChainNextName";
+inline constexpr OUStringLiteral UNO_NAME_TEXT_CLIPVERTOVERFLOW = u"TextClipVerticalOverflow";
 
 inline constexpr OUStringLiteral UNO_NAME_MEASUREKIND = u"MeasureKind";
 inline constexpr OUStringLiteral UNO_NAME_MEASURETEXTHPOS = u"MeasureTextHorizontalPosition";