tdf#91920 sw page gutter margin: handle mirrored margins

- SwPageDesc::Mirror: generate "right gutter margin" from gutter margin
for mirrored pages, we just lost the gutter margin here previously

- SwBorderAttrs::CalcRight: handle right gutter margin, so gutter
increases the right margin, not the left margin on mirrored pages

- lcl_CalcBorderRect: similar to left and top margins, compensate for
right margin gutter as well, so borders are independent from the gutter
margin (Word compat)

Change-Id: Ie4d3459ab6edcc60b20c2fed08dbf45060ca9828
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/110585
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

1 files changed, 4 insertions, 0 deletions

diff --git a/include/editeng/lrspitem.hxx b/include/editeng/lrspitem.hxx
index 9b3ec7734a8e..0510ee47d521 100644
--- a/include/editeng/lrspitem.hxx
+++ b/include/editeng/lrspitem.hxx
@@ -53,6 +53,8 @@ class EDITENG_DLLPUBLIC SvxLRSpaceItem final : public SfxPoolItem
     tools::Long    nRightMargin;       // The unproblematic right edge
     /// The amount of extra space added to the left margin.
     tools::Long    m_nGutterMargin;
+    /// The amount of extra space added to the right margin, on mirrored pages.
+    tools::Long    m_nRightGutterMargin;
 
     sal_uInt16  nPropFirstLineOffset, nPropLeftMargin, nPropRightMargin;
     short   nFirstLineOffset;     // First-line indent _always_ relative to nTxtLeft
@@ -120,6 +122,8 @@ public:
                     { nFirstLineOffset = nValue; }
     void SetGutterMargin(const tools::Long nGutterMargin) { m_nGutterMargin = nGutterMargin; }
     tools::Long GetGutterMargin() const { return m_nGutterMargin; }
+    void SetRightGutterMargin(const tools::Long nRightGutterMargin) { m_nRightGutterMargin = nRightGutterMargin; }
+    tools::Long GetRightGutterMargin() const { return m_nRightGutterMargin; }
 
     void dumpAsXml(xmlTextWriterPtr pWriter) const override;
     virtual boost::property_tree::ptree dumpAsJSON() const override;