private bool _penalizedAsJustified; // flag indicating whether the paragraph should be penalized as fully-justified one /// <summary> /// Construct a paragraph cache to be used during optimal paragraph formatting /// </summary> internal TextParagraphCache( FormatSettings settings, int firstCharIndex, int paragraphWidth ) { Invariant.Assert(settings != null); // create full text _finiteFormatWidth = settings.GetFiniteFormatWidth(paragraphWidth); _fullText = FullTextState.Create(settings, firstCharIndex, _finiteFormatWidth); // acquiring LS context TextFormatterContext context = settings.Formatter.AcquireContext(_fullText, IntPtr.Zero); _fullText.SetTabs(context); IntPtr ploparabreakValue = IntPtr.Zero; LsErr lserr = context.CreateParaBreakingSession( firstCharIndex, _finiteFormatWidth, // breakrec is not needed before the first cp of para cache // since we handle Bidi break ourselves. IntPtr.Zero, ref ploparabreakValue, ref _penalizedAsJustified ); // get the exception in context before it is released Exception callbackException = context.CallbackException; // release the context context.Release(); if (lserr != LsErr.None) { GC.SuppressFinalize(this); if (callbackException != null) { // rethrow exception thrown in callbacks throw new InvalidOperationException(SR.Get(SRID.CreateParaBreakingSessionFailure, lserr), callbackException); } else { // throw with LS error codes TextFormatterContext.ThrowExceptionFromLsError(SR.Get(SRID.CreateParaBreakingSessionFailure, lserr), lserr); } } _ploparabreak.Value = ploparabreakValue; // keep context alive till here GC.KeepAlive(context); }