commit a838f92bb4b1bdc84f49c61f669b1f32ee1f83c3
author Khaled Hosny <khaled@aliftype.com> Fri Dec 30 17:36:27 2022 +0200
committer خالد حسني <khaled@aliftype.com> Fri Dec 30 18:03:33 2022 +0000
tree d56354daccb84c0298e6cc2683654232995e02ec
parent 6743a97c1f6668724eb7c6234a4e736497328957

tdf#152734: Calculate correctly the kashida glyph X position

Change-Id: I4c76aed58acd0598b9d09d147ed86e76ef468c4f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/144878
Tested-by: Jenkins
Reviewed-by: خالد حسني <khaled@aliftype.com>

vcl/source/gdi/CommonSalLayout.cxx

diff --git a/vcl/source/gdi/CommonSalLayout.cxx b/vcl/source/gdi/CommonSalLayout.cxx
index 5cde002..92b09022 100644
--- a/vcl/source/gdi/CommonSalLayout.cxx
+++ b/vcl/source/gdi/CommonSalLayout.cxx
@@ -727,7 +727,7 @@ void GenericSalLayout::ApplyDXArray(const double* pDXArray, const sal_Bool* pKas

    // Map of Kashida insertion points (in the glyph items vector) and the
    // requested width.
    std::map<size_t, DeviceCoordinate> pKashidas;
    std::map<size_t, std::pair<DeviceCoordinate, DeviceCoordinate>> pKashidas;

    // The accumulated difference in X position.
    double nDelta = 0;
@@ -791,7 +791,7 @@ void GenericSalLayout::ApplyDXArray(const double* pDXArray, const sal_Bool* pKas
            // This is a Kashida insertion position, mark it. Kashida glyphs
            // will be inserted below.
            if (pKashidaArray && pKashidaArray[nCharPos])
                pKashidas[i] = nDiff;
                pKashidas[i] = { nDiff, pNewCharWidths[nCharPos] };

            i++;
        }
@@ -823,7 +823,7 @@ void GenericSalLayout::ApplyDXArray(const double* pDXArray, const sal_Bool* pKas
        auto pGlyphIter = m_GlyphItems.begin() + nInserted + pKashida.first;

        // The total Kashida width.
        double nTotalWidth = pKashida.second;
        auto const& [nTotalWidth, nClusterWidth] = pKashida.second;

        // Number of times to repeat each Kashida.
        int nCopies = 1;
@@ -842,9 +842,12 @@ void GenericSalLayout::ApplyDXArray(const double* pDXArray, const sal_Bool* pKas
                nOverlap = nExcess / (nCopies - 1);
        }

        DevicePoint aPos(pGlyphIter->linearPos().getX() - nTotalWidth, 0);
        DevicePoint aPos = pGlyphIter->linearPos();
        int nCharPos = pGlyphIter->charPos();
        GlyphItemFlags const nFlags = GlyphItemFlags::IS_IN_CLUSTER | GlyphItemFlags::IS_RTL_GLYPH;
        // Move to the left side of the adjusted width and start inserting
        // glyphs there.
        aPos.adjustX(-nClusterWidth + pGlyphIter->origWidth());
        while (nCopies--)
        {
            GlyphItem aKashida(nCharPos, 0, nKashidaIndex, aPos, nFlags, nKashidaWidth, 0, 0);