static private void SetSpecialCharacters(ref LsContextInfo contextInfo)
{
Dictionary <char, bool> dict = new Dictionary <char, bool>();
/* The first three char fields do not designate special characters
* dict[contextInfo.wchUndef] = true;
* dict[contextInfo.wchNull] = true;
* dict[contextInfo.wchSpace] = true;
*/
dict[contextInfo.wchHyphen] = true;
dict[contextInfo.wchTab] = true;
dict[contextInfo.wchPosTab] = true;
dict[contextInfo.wchEndPara1] = true;
dict[contextInfo.wchEndPara2] = true;
dict[contextInfo.wchAltEndPara] = true;
dict[contextInfo.wchEndLineInPara] = true;
dict[contextInfo.wchColumnBreak] = true;
dict[contextInfo.wchSectionBreak] = true;
dict[contextInfo.wchPageBreak] = true;
dict[contextInfo.wchNonBreakSpace] = true;
dict[contextInfo.wchNonBreakHyphen] = true;
dict[contextInfo.wchNonReqHyphen] = true;
dict[contextInfo.wchEmDash] = true;
dict[contextInfo.wchEnDash] = true;
dict[contextInfo.wchEmSpace] = true;
dict[contextInfo.wchEnSpace] = true;
dict[contextInfo.wchNarrowSpace] = true;
dict[contextInfo.wchOptBreak] = true;
dict[contextInfo.wchNoBreak] = true;
dict[contextInfo.wchFESpace] = true;
dict[contextInfo.wchJoiner] = true;
dict[contextInfo.wchNonJoiner] = true;
dict[contextInfo.wchToReplace] = true;
dict[contextInfo.wchReplace] = true;
dict[contextInfo.wchVisiNull] = true;
dict[contextInfo.wchVisiAltEndPara] = true;
dict[contextInfo.wchVisiEndLineInPara] = true;
dict[contextInfo.wchVisiEndPara] = true;
dict[contextInfo.wchVisiSpace] = true;
dict[contextInfo.wchVisiNonBreakSpace] = true;
dict[contextInfo.wchVisiNonBreakHyphen] = true;
dict[contextInfo.wchVisiNonReqHyphen] = true;
dict[contextInfo.wchVisiTab] = true;
dict[contextInfo.wchVisiPosTab] = true;
dict[contextInfo.wchVisiEmSpace] = true;
dict[contextInfo.wchVisiEnSpace] = true;
dict[contextInfo.wchVisiNarrowSpace] = true;
dict[contextInfo.wchVisiOptBreak] = true;
dict[contextInfo.wchVisiNoBreak] = true;
dict[contextInfo.wchVisiFESpace] = true;
dict[contextInfo.wchEscAnmRun] = true;
dict[contextInfo.wchPad] = true;
// Many of these fields have value 'wchUndef'. Remove it now.
// (This is robust, even if Init() changes the char field assignments.)
dict.Remove(contextInfo.wchUndef);
// Remember the result. First thread to get here wins.
System.Threading.Interlocked.CompareExchange <Dictionary <char, bool> >(ref _specialCharacters, dict, null);
}
private void Init()
{
if (_ploc.Value == System.IntPtr.Zero)
{
// Initializing context
LsErr lserr = LsErr.None;
LsContextInfo contextInfo = new LsContextInfo();
LscbkRedefined lscbkRedef = new LscbkRedefined();
_callbacks = new LineServicesCallbacks();
_callbacks.PopulateContextInfo(ref contextInfo, ref lscbkRedef);
contextInfo.version = 4; // we should set this right, they might check it in the future
contextInfo.pols = IntPtr.Zero; // This will be filled in the un-managed code
contextInfo.cEstimatedCharsPerLine = TextStore.TypicalCharactersPerLine;
contextInfo.fDontReleaseRuns = 1; // dont waste time
// There are 3 justification priorities right now with one considered good
// and the other two provided for emergency expansion.
// Future development to enable international justification will likely change this.
// e.g. Kashida justification would require more than one good priorities.
contextInfo.cJustPriorityLim = 3;
// Fill up text configuration
contextInfo.wchNull = '\u0000';
contextInfo.wchUndef = '\u0001';
contextInfo.wchTab = '\u0009';
contextInfo.wchPosTab = contextInfo.wchUndef;
contextInfo.wchEndPara1 = TextStore.CharParaSeparator; // Unicode para separator
contextInfo.wchEndPara2 = contextInfo.wchUndef;
contextInfo.wchSpace = '\u0020';
contextInfo.wchHyphen = MS.Internal.Text.TextInterface.TextAnalyzer.CharHyphen; //'\x002d';
contextInfo.wchNonReqHyphen = '\u00AD';
contextInfo.wchNonBreakHyphen = '\u2011';
contextInfo.wchEnDash = '\u2013';
contextInfo.wchEmDash = '\u2014';
contextInfo.wchEnSpace = '\u2002';
contextInfo.wchEmSpace = '\u2003';
contextInfo.wchNarrowSpace = '\u2009';
contextInfo.wchJoiner = '\u200D';
contextInfo.wchNonJoiner = '\u200C';
contextInfo.wchVisiNull = '\u2050';
contextInfo.wchVisiAltEndPara = '\u2051';
contextInfo.wchVisiEndLineInPara = '\u2052';
contextInfo.wchVisiEndPara = '\u2053';
contextInfo.wchVisiSpace = '\u2054';
contextInfo.wchVisiNonBreakSpace = '\u2055';
contextInfo.wchVisiNonBreakHyphen = '\u2056';
contextInfo.wchVisiNonReqHyphen = '\u2057';
contextInfo.wchVisiTab = '\u2058';
contextInfo.wchVisiPosTab = contextInfo.wchUndef;
contextInfo.wchVisiEmSpace = '\u2059';
contextInfo.wchVisiEnSpace = '\u205A';
contextInfo.wchVisiNarrowSpace = '\u205B';
contextInfo.wchVisiOptBreak = '\u205C';
contextInfo.wchVisiNoBreak = '\u205D';
contextInfo.wchVisiFESpace = '\u205E';
contextInfo.wchFESpace = '\u3000';
contextInfo.wchEscAnmRun = TextStore.CharParaSeparator;
contextInfo.wchAltEndPara = contextInfo.wchUndef;
contextInfo.wchEndLineInPara = TextStore.CharLineSeparator;
contextInfo.wchSectionBreak = contextInfo.wchUndef;
contextInfo.wchNonBreakSpace = '\u00A0';
contextInfo.wchNoBreak = contextInfo.wchUndef;
contextInfo.wchColumnBreak = contextInfo.wchUndef;
contextInfo.wchPageBreak = contextInfo.wchUndef;
contextInfo.wchOptBreak = contextInfo.wchUndef;
contextInfo.wchToReplace = contextInfo.wchUndef;
contextInfo.wchReplace = contextInfo.wchUndef;
IntPtr ploc = IntPtr.Zero;
IntPtr ppenaltyModule = IntPtr.Zero;
lserr = UnsafeNativeMethods.LoCreateContext(
ref contextInfo,
ref lscbkRedef,
out ploc
);
if (lserr != LsErr.None)
{
ThrowExceptionFromLsError(SR.Get(SRID.CreateContextFailure, lserr), lserr);
}
_ploc.Value = ploc;
GC.KeepAlive(contextInfo);
// There is a trick here to pass in this resolution as in twips
// (1/1440 an inch).
//
// LSCreateLine assumes the max width passed in is in twips so to
// allow its client to express their width in page unit. However
// it asks client to set up the real device resolution here so
// that it can internally translate the "twips" width into client
// actual device unit.
//
// We are not device dependent anyway, so instead of following the
// rule which will cause us to validate the context every time. We
// choose to cheat LS to think that our unit is twips.
//
LsDevRes devRes;
devRes.dxpInch = devRes.dxrInch = TwipsPerInch;
devRes.dypInch = devRes.dyrInch = TwipsPerInch;
SetDoc(
true, // Yes, we will be displaying
true, // Yes, reference and presentation are the same device
ref devRes // Device resolutions
);
SetBreaking(BreakStrategies.BreakCJK);
}
}
