tdf#104930 aligning CTL text with hanging baseline.

1. SwTextSizeInfo::GetHangingBaseline() calls SwFont::GetHangingBaseline() to obtain the hanging baseline value. Only CTL script handled, it always return 0 for other two scripts. Eventually Outdev::GetFontMetric() and TextMetric::GetHangingBaseline() are called to obtain the hanging baseline value from vcl.

2. SwTextFormatter::CalcAscent() sets the baseline value for the portion via SwTextSizeInfo::GetHangingBaseline().

3. SwTextFormatter::InsertPortion() sets the maximum baseline value for the whole line.

4. SwTextCursor::AdjustBaseLine() calculates the new baseline in case hanging baseline is available.

Change-Id: I1aae7a34dfc953227b7873fc8e3af5cc7e2fbbff
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/133668
Tested-by: Jenkins
Reviewed-by: Mark Hung <marklh9@gmail.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/sw/source/core/text/itrtxt.cxx b/sw/source/core/text/itrtxt.cxx
index 8fb8334a83fa..53e084b03736 100644
--- a/sw/source/core/text/itrtxt.cxx
+++ b/sw/source/core/text/itrtxt.cxx
@@ -289,7 +289,14 @@ SwTwips SwTextCursor::AdjustBaseLine( const SwLineLayout& rLine,
                 [[fallthrough]];
             case SvxParaVertAlignItem::Align::Baseline :
                 // base line
-                nOfst = nOfst + rLine.GetAscent();
+                if (pPor && pPor->GetHangingBaseline())
+                {
+                    nOfst += rLine.GetAscent()          // Romn baseline of the line.
+                        - rLine.GetHangingBaseline()    // Hanging baseline of the line.
+                        + pPor->GetHangingBaseline();   // Romn baseline of the portion.
+                }
+                else
+                    nOfst = nOfst + rLine.GetAscent();
                 break;
         }
     }