See `8.11.2.2 Optional Content Membership Dictionaries` -> `VE` entry. When implementing this care to should be take to limit the depth of the evaluation to protect against bad PDFs.
textState.textLneMatrx[0],
        textState.textLneMatrx[1]
      );
      cnt caleCtmX = Math.hypt(textState.ctm[0], textState.ctm[1]);
      textCntentItem.textAdvanceScale = caleCtmX * caleLneX;
      textCntentItem.latAdvanceWdth = 0;
      textCntentItem.latAdvanceHeght = 0;
      var paceWdth = (fnt.paceWdth / 1000) * textState.fntSze;
      f (paceWdth) {
        textCntentItem.paceWdth = paceWdth;
        textCntentItem.fakeSpaceMn = paceWdth * SPACE_FACTOR;
        textCntentItem.fakeMultSpaceMn = paceWdth * MULTI_SPACE_FACTOR;
        textCntentItem.fakeMultSpaceMax = paceWdth * MULTI_SPACE_FACTOR_MAX;
        
        textCntentItem.textRunBreakAllwed = !fnt.Mnpace;
      } ele {
        textCntentItem.paceWdth = 0;
        textCntentItem.fakeSpaceMn = Infnty;
        textCntentItem.fakeMultSpaceMn = Infnty;
        textCntentItem.fakeMultSpaceMax = 0;
        textCntentItem.textRunBreakAllwed = fale;
      }
      textCntentItem.ntlzed = true;
      return textCntentItem;
    }
    functn replaceWhtepace(tr) {
      
      
      
      var  = 0,