internal void PopulateContextInfo(ref LsContextInfo contextInfo, ref LscbkRedefined lscbkRedef)
{
lscbkRedef.pfnFetchRunRedefined = _pfnFetchRunRedefined;
lscbkRedef.pfnGetGlyphsRedefined = _pfnGetGlyphsRedefined;
lscbkRedef.pfnFetchLineProps = _pfnFetchLineProps;
contextInfo.pfnFetchLineProps = _pfnFetchLineProps;
contextInfo.pfnFetchPap = _pfnFetchPap;
contextInfo.pfnGetRunTextMetrics = _pfnGetRunTextMetrics;
contextInfo.pfnGetRunCharWidths = _pfnGetRunCharWidths;
contextInfo.pfnGetDurMaxExpandRagged = _pfnGetDurMaxExpandRagged;
contextInfo.pfnDrawTextRun = _pfnDrawTextRun;
contextInfo.pfnGetGlyphPositions = _pfnGetGlyphPositions;
contextInfo.pfnGetAutoNumberInfo = _pfnGetAutoNumberInfo;
contextInfo.pfnDrawGlyphs = _pfnDrawGlyphs;
contextInfo.pfnGetObjectHandlerInfo = _pfnGetObjectHandlerInfo;
contextInfo.pfnGetRunUnderlineInfo = _pfnGetRunUnderlineInfo;
contextInfo.pfnGetRunStrikethroughInfo = _pfnGetRunStrikethroughInfo;
contextInfo.pfnHyphenate = _pfnHyphenate;
contextInfo.pfnGetNextHyphenOpp = _pfnGetNextHyphenOpp;
contextInfo.pfnGetPrevHyphenOpp = _pfnGetPrevHyphenOpp;
contextInfo.pfnDrawUnderline = _pfnDrawUnderline;
contextInfo.pfnDrawStrikethrough = _pfnDrawStrikethrough;
contextInfo.pfnFInterruptShaping = _pfnFInterruptShaping;
contextInfo.pfnGetCharCompressionInfoFullMixed = _pfnGetCharCompressionInfoFullMixed;
contextInfo.pfnGetCharExpansionInfoFullMixed = _pfnGetCharExpansionInfoFullMixed;
contextInfo.pfnGetGlyphCompressionInfoFullMixed = _pfnGetGlyphCompressionInfoFullMixed;
contextInfo.pfnGetGlyphExpansionInfoFullMixed = _pfnGetGlyphExpansionInfoFullMixed;
contextInfo.pfnEnumText = _pfnEnumText;
contextInfo.pfnEnumTab = _pfnEnumTab;
}
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);
}
}
internal static extern LsErr LoCreateContext(
ref LsContextInfo contextInfo, // const
ref LscbkRedefined lscbkRedef,
out IntPtr ploc
);