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);
}
/// <summary>
/// Constructing a FullTextLine
/// </summary>
/// <param name="settings">text formatting settings</param>
/// <param name="cpFirst">Line's first cp</param>
/// <param name="lineLength">character length of the line</param>
/// <param name="paragraphWidth">paragraph width</param>
/// <param name="lineFlags">line formatting control flags</param>
internal FullTextLine(
FormatSettings settings,
int cpFirst,
int lineLength,
int paragraphWidth,
LineFlags lineFlags
)
: this(settings.TextFormattingMode, settings.Pap.Justify)
{
if ( (lineFlags & LineFlags.KeepState) != 0
|| settings.Pap.AlwaysCollapsible)
{
_statusFlags |= StatusFlags.KeepState;
}
int finiteFormatWidth = settings.GetFiniteFormatWidth(paragraphWidth);
FullTextState fullText = FullTextState.Create(settings, cpFirst, finiteFormatWidth);
// formatting the line
FormatLine(
fullText,
cpFirst,
lineLength,
fullText.FormatWidth,
finiteFormatWidth,
paragraphWidth,
lineFlags,
null // collapsingSymbol
);
}
