diff --git a/libs/qsynedit/qsynedit/document.cpp b/libs/qsynedit/qsynedit/document.cpp
index 077a94e1..f9032030 100644
--- a/libs/qsynedit/qsynedit/document.cpp
+++ b/libs/qsynedit/qsynedit/document.cpp
@@ -837,6 +837,22 @@ QString Document::glyphAt(int line, int charPos)
     return mLines[line]->glyph(glyphIdx);
 }
 
+int Document::charToGlyphStartChar(int line, int charPos)
+{
+    QMutexLocker locker(&mMutex);
+    QList<int> glyphPositions = mLines[line]->glyphPositions();
+    int glyphIdx = charToGlyphIndex(glyphPositions, charPos);
+    return mLines[line]->glyphStart(glyphIdx);
+}
+
+// int Document::columnToGlyphStartColumn(int line, int charPos)
+// {
+//     QMutexLocker locker(&mMutex);
+//     QList<int> glyphColumnsList = mLines[line]->glyphColumnsList();
+//     int glyphIdx = columnToGlyphIndex(glyphColumnsList, charPos);
+//     return mLines[line]->glyphStartColumn(glyphIdx);
+// }
+
 QList<int> calcGlyphPositions(const QString &text)
 {
     QList<int> glyphPositions;
@@ -847,10 +863,15 @@ QList<int> calcGlyphPositions(const QString &text)
         QChar ch = text[i];
         if (ch.isHighSurrogate() && i+1<text.length() && QChar::isLowSurrogate(text[i+1].unicode())) {
             //character that larger than 0xffff
-            int ucs4 = QChar::surrogateToUcs4(ch, text[i+1]);
-            if (QChar::combiningClass(ucs4)==0 || glyphPositions.isEmpty()) {
+            uint ucs4 = QChar::surrogateToUcs4(ch, text[i+1]);
+            if (QChar::combiningClass(ucs4)!=0 && !glyphPositions.isEmpty()) {
+                //a Combining character
+            } else if (ucs4>=0xE0100 && ucs4 <= 0xE01EF) {
+                //variation selector
+            } else {
                 if (!consecutive)
                     glyphPositions.append(i);
+                consecutive = false;
             }
             i+=2;
             continue;
@@ -858,13 +879,17 @@ QList<int> calcGlyphPositions(const QString &text)
             consecutive = true;
         } else if (ch.combiningClass()!=0 && !glyphPositions.isEmpty()) {
             //a Combining character
+        } else if (ch.unicode()>=0xFE00 && ch.unicode()<=0xFE0F) {
+            //variation selector
         } else {
+            //qDebug("%x %d", ch.unicode(), ch.combiningClass());
             if (!consecutive)
                 glyphPositions.append(i);
             consecutive = false;
         }
         i++;
     }
+    //qDebug()<<text<<glyphPositions;
     return glyphPositions;
 }
 
@@ -910,13 +935,17 @@ int Document::glyphColumns(const QString &glyph, int colsBefore) const
         } else {
             int width = mFontMetrics.horizontalAdvance(ch);
             glyphCols = std::max(1.0, std::ceil(width / (double)mCharWidth));
+            //qDebug()<<glyph<<glyphCols<<width<<mCharWidth;
         }
     } else {
         int width = mNonAsciiFontMetrics.horizontalAdvance(glyph);
         glyphCols = std::max(1.0, std::ceil(width / (double)mCharWidth));
+        int modular = width % mCharWidth;
+        if (modular >0 && (modular <= (mCharWidth/5)) )
+            glyphCols--;
+        //qDebug()<<glyph<<glyphCols<<width<<mCharWidth;
     }
     return glyphCols;
-
 }
 
 int Document::charToGlyphIndex(int line, int charIdx)
diff --git a/libs/qsynedit/qsynedit/document.h b/libs/qsynedit/qsynedit/document.h
index a14cc9cf..4167fc34 100644
--- a/libs/qsynedit/qsynedit/document.h
+++ b/libs/qsynedit/qsynedit/document.h
@@ -435,6 +435,9 @@ public:
 
     QString glyph(int line, int glyphIdx);
     QString glyphAt(int line, int charPos);
+
+    int charToGlyphStartChar(int line, int charPos);
+    //int columnToGlyphStartColumn(int line, int charPos);
     /**
      * @brief calculate display width (in columns) of a string
      *
diff --git a/libs/qsynedit/qsynedit/painter.cpp b/libs/qsynedit/qsynedit/painter.cpp
index e581cc5e..79276e00 100644
--- a/libs/qsynedit/qsynedit/painter.cpp
+++ b/libs/qsynedit/qsynedit/painter.cpp
@@ -399,12 +399,13 @@ void QSynEditPainter::paintToken(const QString &token, int tokenCols, int column
             int tokenColLen=0;
             startPaint = false;
             QList<int> glyphPositions = calcGlyphPositions(token);
+            qDebug()<<"painting:"<<token;
             for (int i=0; i< glyphPositions.length();i++) {
                 int glyphStart = glyphPositions[i];
                 int glyphEnd =(i+1<glyphPositions.length())?glyphPositions[i+1]:token.length();
                 QString glyph = token.mid(glyphStart,glyphEnd-glyphStart);
                 int charCols = edit->document()->glyphColumns(glyph, columnsBefore+tokenColLen);
-                //qDebug()<<glyph<<charCols;
+                qDebug()<<glyph<<charCols;
                 if (tokenColLen+charCols>=first) {
                     if (!startPaint && (tokenColLen+1!=first)) {
                         nX-= (first - tokenColLen - 1) * edit->mCharWidth;
diff --git a/libs/qsynedit/qsynedit/qsynedit.cpp b/libs/qsynedit/qsynedit/qsynedit.cpp
index 005e8ec9..516698ef 100644
--- a/libs/qsynedit/qsynedit/qsynedit.cpp
+++ b/libs/qsynedit/qsynedit/qsynedit.cpp
@@ -726,11 +726,9 @@ DisplayCoord QSynEdit::pixelsToNearestRowColumn(int aX, int aY) const
 
 DisplayCoord QSynEdit::pixelsToRowColumn(int aX, int aY) const
 {
-    return {
-        std::max(1, (int)(mLeftChar + (aX - mGutterWidth - 2.0) / mCharWidth)),
-        std::max(1, mTopLine + (aY / mTextHeight))
-    };
-
+    int line = std::max(1, mTopLine + (aY / mTextHeight));
+    int col = std::max(1, (int)(mLeftChar + (aX - mGutterWidth - 2.0) / mCharWidth));
+    return DisplayCoord{col, line};
 }
 
 QPoint QSynEdit::rowColumnToPixels(const DisplayCoord &coord) const
@@ -864,7 +862,7 @@ int QSynEdit::columnToChar(int aLine, int aColumn) const
     //Q_ASSERT( (aLine <= mDocument->count()) && (aLine >= 1));
     if (aLine <= mDocument->count()) {
         QString s = getDisplayStringAtLine(aLine);
-        return mDocument->columnToChar(aLine,s,aColumn)+1;
+        return mDocument->columnToChar(aLine-1,s,aColumn)+1;
     }
     return aColumn;
 }
@@ -872,7 +870,7 @@ int QSynEdit::columnToChar(int aLine, int aColumn) const
 int QSynEdit::columnToChar(int aLine, const QString &s, int aColumn) const
 {
     if (aLine <= mDocument->count()) {
-        return mDocument->columnToChar(aLine,s,aColumn)+1;
+        return mDocument->columnToChar(aLine-1,s,aColumn)+1;
     }
     return aColumn;
 }