/// <summary>
/// Construct an lsrun
/// </summary>
private LSRun(
TextRunInfo runInfo,
IList <TextEffect> textEffects,
Plsrun type,
int offsetToFirstCp,
int textRunLength,
int emSize,
ushort charFlags,
CharacterBufferRange charBufferRange,
int baselineOffset,
int height,
TextShapeableSymbols shapeable,
byte bidiLevel
)
{
_runInfo = runInfo;
_type = type;
_offsetToFirstCp = offsetToFirstCp;
_textRunLength = textRunLength;
_emSize = emSize;
_charFlags = charFlags;
_charBufferRange = charBufferRange;
_baselineOffset = baselineOffset;
_height = height;
_bidiLevel = bidiLevel;
_shapeable = shapeable;
_textEffects = textEffects;
}
private IList <TextEffect> _textEffects; // TextEffects that should be applied for this run
/// <summary>
/// Construct an lsrun
/// </summary>
internal LSRun(
TextRunInfo runInfo,
IList <TextEffect> textEffects,
Plsrun type,
int offsetToFirstCp,
int textRunLength,
int emSize,
ushort charFlags,
CharacterBufferRange charBufferRange,
TextShapeableSymbols shapeable,
double realToIdeal,
byte bidiLevel
) :
this(
runInfo,
textEffects,
type,
offsetToFirstCp,
textRunLength,
emSize,
charFlags,
charBufferRange,
(shapeable != null ? (int)Math.Round(shapeable.Baseline * realToIdeal) : 0),
(shapeable != null ? (int)Math.Round(shapeable.Height * realToIdeal) : 0),
shapeable,
bidiLevel
)
{
}
/// <summary>
/// Constructing a textrun info
/// </summary>
/// <param name="charBufferRange">characte buffer range for the run</param>
/// <param name="textRunLength">textrun length</param>
/// <param name="offsetToFirstCp">character offset to run first cp</param>
/// <param name="textRun">text run</param>
/// <param name="lsRunType">the internal LS run type </param>
/// <param name="charFlags">character attribute flags</param>
/// <param name="digitCulture">digit culture for the run</param>
/// <param name="contextualSubstitution">contextual number substitution for the run</param>
/// <param name="symbolTypeface">if true, indicates a text run in a symbol (i.e., non-Unicode) font</param>
/// <param name="modifierScope">The current TextModifier scope for this TextRunInfo</param>
internal TextRunInfo(
CharacterBufferRange charBufferRange,
int textRunLength,
int offsetToFirstCp,
TextRun textRun,
Plsrun lsRunType,
ushort charFlags,
CultureInfo digitCulture,
bool contextualSubstitution,
bool symbolTypeface,
TextModifierScope modifierScope
)
{
_charBufferRange = charBufferRange;
_textRunLength = textRunLength;
_offsetToFirstCp = offsetToFirstCp;
_textRun = textRun;
_plsrun = lsRunType;
_charFlags = charFlags;
_digitCulture = digitCulture;
_runFlags = 0;
_modifierScope = modifierScope;
if (contextualSubstitution)
{
_runFlags |= (ushort)RunFlags.ContextualSubstitution;
}
if (symbolTypeface)
{
_runFlags |= (ushort)RunFlags.IsSymbol;
}
}
private IList<TextEffect> _textEffects; // TextEffects that should be applied for this run
/// <summary>
/// Construct an lsrun
/// </summary>
internal LSRun(
TextRunInfo runInfo,
IList<TextEffect> textEffects,
Plsrun type,
int offsetToFirstCp,
int textRunLength,
int emSize,
ushort charFlags,
CharacterBufferRange charBufferRange,
TextShapeableSymbols shapeable,
double realToIdeal,
byte bidiLevel
) :
this(
runInfo,
textEffects,
type,
offsetToFirstCp,
textRunLength,
emSize,
charFlags,
charBufferRange,
(shapeable != null ? (int)Math.Round(shapeable.Baseline * realToIdeal) : 0),
(shapeable != null ? (int)Math.Round(shapeable.Height * realToIdeal) : 0),
shapeable,
bidiLevel
)
{}
/// <summary>
/// Map LSCP to host CP, and return the last LSRun
/// before the specified limit.
/// </summary>
internal LSRun CountText(
int lscpLim,
int cpFirst,
out int count
)
{
LSRun lastRun = null;
count = 0;
int lsccp = lscpLim - _store.CpFirst;
Debug.Assert(lsccp > 0, "Zero-length text line!");
foreach (Span span in _store.PlsrunVector)
{
if (lsccp <= 0)
{
break;
}
Plsrun plsrun = (Plsrun)span.element;
// There should be no marker runs in _plsrunVector.
Debug.Assert(!TextStore.IsMarker(plsrun));
// Is it a normal, non-static, LSRun?
if (plsrun >= Plsrun.FormatAnchor)
{
// Get the run and remember the last run.
lastRun = _store.GetRun(plsrun);
// Accumulate the length.
int cpRun = lastRun.Length;
if (cpRun > 0)
{
if (lsccp < span.length && cpRun == span.length)
{
count += lsccp;
break;
}
count += cpRun;
}
}
lsccp -= span.length;
}
// make char count relative to cpFirst as the cpFirst of this metrics may not
// be the same as the cpFirst of the store in optimal paragraph formatting.
count = count - cpFirst + _store.CpFirst;
return(lastRun);
}
/// <summary>
/// Construct an lsrun for a constant control char
/// </summary>
internal LSRun(
Plsrun type,
IntPtr controlChar
) :
this(
null, // text run info
type,
controlChar,
0, // textRunLength
-1, // offsetToFirstChar
0
)
{
}
/// <summary>
/// Convert the specified external CP to LSCP corresponding to a possible break position for optimal break.
/// </summary>
/// <remarks>
/// There is a generic issue that one CP could map to multiple LSCPs when it comes to
/// lsrun that occupies no actual CP. Such lsrun is generated by line layout during
/// formatting to accomplsih specific purpose i.e. run representing open and close
/// reverse object or a fake-linebreak lsrun.
///
/// According to SergeyGe and Antons, LS will never breaks immediately after open reverse
/// or immediately before close reverse. It also never break before a linebreak character.
///
/// Therefore, it is safe to make an assumption here that one CP will indeed map to one
/// LSCP given being the LSCP before the open reverse and the LSCP after the close reverse.
/// Never the vice-versa.
///
/// This is the reason why the loop inside this method may overread the PLSRUN span by
/// one span at the end. The loop is designed to skip over all the lsruns with zero CP
/// which is not the open reverse.
///
/// This logic is exactly the same as the one used by FullTextLine.PrefetchLSRuns. Any
/// attempt to change it needs to be thoroughly reviewed. The same logic is to be applied
/// accordingly on PrefetchLSRuns.
///
/// [Wchao, 5-24-2005]
///
/// </remarks>
internal int GetBreakpointInternalCp(int cp)
{
int ccp = cp - _store.CpFirst;
int lscp = _store.CpFirst;
int ccpCurrent = 0;
SpanVector plsrunVector = _store.PlsrunVector;
LSRun lsrun;
int i = 0;
int lastSpanLength = 0;
int lastRunLength = 0;
do
{
Span span = plsrunVector[i];
Plsrun plsrun = (Plsrun)span.element;
lsrun = _store.GetRun(plsrun);
if (ccp == ccpCurrent && lsrun.Type == Plsrun.Reverse)
{
break;
}
lastSpanLength = span.length;
lastRunLength = (plsrun >= Plsrun.FormatAnchor ? lsrun.Length : 0);
lscp += lastSpanLength;
ccpCurrent += lastRunLength;
} while (++i < plsrunVector.Count &&
lsrun.Type != Plsrun.ParaBreak &&
ccp >= ccpCurrent
);
// Since we may overread the span vector by one span,
// we need to subtract the accumulated lscp by the number of cp we may have overread.
if (ccpCurrent == ccp || lastSpanLength == lastRunLength)
{
return(lscp - ccpCurrent + ccp);
}
Invariant.Assert(ccpCurrent - ccp == lastRunLength);
return(lscp - lastSpanLength);
}
internal LSRun(
TextRunInfo runInfo,
Plsrun type,
IntPtr controlChar,
int textRunLength,
int offsetToFirstCp,
byte bidiLevel
)
{
unsafe
{
_runInfo = runInfo;
_type = type;
_charBufferRange = new CharacterBufferRange((char *)controlChar, 1);
_textRunLength = textRunLength;
_offsetToFirstCp = offsetToFirstCp;
_bidiLevel = bidiLevel;
}
}
/// <summary>
/// Construct an lsrun for a constant control char
/// </summary>
internal LSRun(
Plsrun type,
IntPtr controlChar
) :
this(
null, // text run info
type,
controlChar,
0, // textRunLength
-1, // offsetToFirstChar
0
)
{}
internal LsErr GetRunStrikethroughInfo(
IntPtr pols, // Line Layout context
Plsrun plsrun, // plsrun
ref LsHeights lsHeights, // run height
LsTFlow textFlow, // text flow direction
ref LsStInfo stInfo // [out] result strikethrough info
)
{
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
lsrun = Draw.CurrentLine.GetRun(plsrun);
Debug.Assert(
!TextStore.IsContent(plsrun) || lsrun.Type == Plsrun.Text || lsrun.Type == Plsrun.InlineObject,
"Invalid run"
);
stInfo = new LsStInfo();
double strikeThroughPositionInEm;
double strikeThroughThicknessInEm;
GetLSRunStrikethroughMetrics(lsrun, out strikeThroughPositionInEm, out strikeThroughThicknessInEm);
stInfo.cNumberOfLines = 1;
stInfo.dvpLowerStrikethroughOffset = (int)Math.Round(lsrun.EmSize * strikeThroughPositionInEm);
stInfo.dvpLowerStrikethroughSize = (int)Math.Round(lsrun.EmSize * strikeThroughThicknessInEm);
Debug.Assert(stInfo.dvpLowerStrikethroughSize >= 0);
if (stInfo.dvpLowerStrikethroughSize <= 0)
stInfo.dvpLowerStrikethroughSize = 1;
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("GetRunStrikethroughInfo", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
internal LsErr GetRunUnderlineInfo(
IntPtr pols, // Line Layout context
Plsrun plsrun, // plsrun
ref LsHeights lsHeights, // run height
LsTFlow textFlow, // text flow direction
ref LsULInfo ulInfo // [out] result underline info
)
{
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
lsrun = Draw.CurrentLine.GetRun(plsrun);
Debug.Assert(
!TextStore.IsContent(plsrun) || lsrun.Type == Plsrun.Text || lsrun.Type == Plsrun.InlineObject,
"Invalid run"
);
ulInfo = new LsULInfo();
double underlinePositionInEm;
double underlineThicknessInEm;
if (lsrun.Shapeable != null)
{
underlinePositionInEm = lsrun.Shapeable.UnderlinePosition;
underlineThicknessInEm = lsrun.Shapeable.UnderlineThickness;
}
else
{
underlinePositionInEm = lsrun.RunProp.Typeface.UnderlinePosition;
underlineThicknessInEm = lsrun.RunProp.Typeface.UnderlineThickness;
}
ulInfo.cNumberOfLines = 1;
ulInfo.dvpFirstUnderlineOffset = (int)Math.Round(lsrun.EmSize * -underlinePositionInEm);
ulInfo.dvpFirstUnderlineSize = (int)Math.Round(lsrun.EmSize * underlineThicknessInEm);
Debug.Assert(ulInfo.dvpFirstUnderlineSize >= 0);
if (ulInfo.dvpFirstUnderlineSize <= 0)
ulInfo.dvpFirstUnderlineSize = 1;
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("GetAutoNumberInfo", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
internal LsErr GetDurMaxExpandRagged(
IntPtr pols, // Line Layout context
Plsrun plsrun, // plsrun
LsTFlow lstFlow, // text flow
ref int maxExpandRagged // [out] em width
)
{
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
lsrun = FullText.StoreFrom(plsrun).GetRun(plsrun);
maxExpandRagged = lsrun.EmSize;
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("GetDurMaxExpandRagged", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
internal unsafe LsErr GetRunCharWidths(
IntPtr pols, // Line Layout context
Plsrun plsrun, // plsrun
LsDevice device, // kind of device
char* charString, // character string
int stringLength, // string length
int maxWidth, // max width allowance
LsTFlow textFlow, // text flow
int* charWidths, // [out] returning char widths up to given upperbound
ref int totalWidth, // [out] total run width
ref int stringLengthFitted // [out] number of char fitted
)
{
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
TextFormatterImp formatter;
if (FullText != null)
{
lsrun = FullText.StoreFrom(plsrun).GetRun(plsrun);
formatter = FullText.Formatter;
}
else
{
#if DEBUG
Debug.Assert(Draw.CurrentLine.FullTextState != null);
#endif
lsrun = Draw.CurrentLine.GetRun(plsrun);
formatter = Draw.CurrentLine.Formatter;
}
if (lsrun.Type == Plsrun.Text)
{
Debug.Assert(lsrun.Shapeable != null && stringLength > 0);
lsrun.Shapeable.GetAdvanceWidthsUnshaped(charString, stringLength, TextFormatterImp.ToIdeal, charWidths);
totalWidth = 0;
stringLengthFitted = 0;
do
{
totalWidth += charWidths[stringLengthFitted];
} while (
++stringLengthFitted < stringLength
&& totalWidth <= maxWidth
);
if (totalWidth <= maxWidth && FullText != null)
{
int cpLimit = lsrun.OffsetToFirstCp + stringLengthFitted;
if (cpLimit > FullText.CpMeasured)
{
FullText.CpMeasured = cpLimit;
}
}
}
else
{
charWidths[0] = 0;
totalWidth = 0;
stringLengthFitted = stringLength;
}
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("GetRunCharWidths", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
internal LsErr GetRunTextMetrics(
System.IntPtr pols, // Line Layout context
Plsrun plsrun, // plsrun
LsDevice lsDevice, // kind of device
LsTFlow lstFlow, // text flow
ref LsTxM lstTextMetrics // [out] returning metrics
)
{
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
FullTextState fullText = FullText;
TextStore store = fullText.StoreFrom(plsrun);
lsrun = store.GetRun(plsrun);
if (lsrun.Height > 0)
{
lstTextMetrics.dvAscent = lsrun.BaselineOffset;
lstTextMetrics.dvMultiLineHeight = lsrun.Height;
}
else
{
Typeface typeface = store.Pap.DefaultTypeface;
lstTextMetrics.dvAscent = (int)Math.Round(typeface.Baseline(store.Pap.EmSize, Constants.DefaultIdealToReal, Util.PixelsPerDip, fullText.TextFormattingMode));
lstTextMetrics.dvMultiLineHeight = (int)Math.Round(typeface.LineSpacing(store.Pap.EmSize, Constants.DefaultIdealToReal, Util.PixelsPerDip, fullText.TextFormattingMode));
}
lstTextMetrics.dvDescent = lstTextMetrics.dvMultiLineHeight - lstTextMetrics.dvAscent;
lstTextMetrics.fMonospaced = 0;
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("GetRunTextMetrics", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
internal LsErr FInterruptShaping(
IntPtr pols, // Line Layout context
LsTFlow textFlow, // text flow
Plsrun plsrunFirst, // first run
Plsrun plsrunSecond, // second run
ref int fIsInterruptOk // [out] disconnect glyphs between runs?
)
{
LsErr lserr = LsErr.None;
try
{
TextStore store = FullText.StoreFrom(plsrunFirst);
if ( !TextStore.IsContent(plsrunFirst)
|| !TextStore.IsContent(plsrunSecond))
{
fIsInterruptOk = 1;
return LsErr.None;
}
LSRun lsrunFirst = store.GetRun(plsrunFirst);
LSRun lsrunSecond = store.GetRun(plsrunSecond);
fIsInterruptOk = !(
lsrunFirst.BidiLevel == lsrunSecond.BidiLevel
&& lsrunFirst.Shapeable != null
&& lsrunSecond.Shapeable != null
&& lsrunFirst.Shapeable.CanShapeTogether(lsrunSecond.Shapeable)
) ? 1 : 0;
}
catch (Exception e)
{
SaveException(e, Plsrun.Undefined, null);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("FInterruptShaping", Plsrun.Undefined, null);
lserr = LsErr.ClientAbort;
}
return lserr;
}
/// <summary>
/// Get a text store containing the specified plsrun
/// </summary>
internal TextStore StoreFrom(Plsrun plsrun)
{
return(TextStore.IsMarker(plsrun) ? _markerStore : _store);
}
internal LsErr DrawStrikethrough(
IntPtr pols, // Line Layout context
Plsrun plsrun, // plsrun
uint stType, // kind of strike
ref LSPOINT ptOrigin, // [in] drawing origin
int stLength, // strike length
int stThickness, // strike thickness
LsTFlow textFlow, // text flow direction
uint displayMode, // display mode
ref LSRECT clipRect // [in] clipping rectangle
)
{
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
if (!TextStore.IsContent(plsrun))
{
return LsErr.None;
}
TextMetrics.FullTextLine currentLine = Draw.CurrentLine;
lsrun = currentLine.GetRun(plsrun);
double strikeThroughPositionInEm;
double strikeThroughThicknessInEm;
GetLSRunStrikethroughMetrics(lsrun, out strikeThroughPositionInEm, out strikeThroughThicknessInEm);
int baselineTop = ptOrigin.y + (int)Math.Round(lsrun.EmSize * strikeThroughPositionInEm);
int overlineTop = baselineTop - (lsrun.BaselineOffset - (int)Math.Round(lsrun.EmSize * strikeThroughThicknessInEm));
const uint locationMask =
(1U << (int)TextDecorationLocation.OverLine) |
(1U << (int)TextDecorationLocation.Strikethrough) |
(1U << (int)TextDecorationLocation.Baseline);
DrawTextDecorations(
lsrun,
locationMask,
ptOrigin.x, // left
0, // underline top; not used
overlineTop,
ptOrigin.y, // strikethrough top from LS
baselineTop,
stLength,
stThickness,
textFlow
);
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("DrawStrikethrough", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
internal LsErr DrawUnderline(
IntPtr pols, // Line Layout context
Plsrun plsrun, // plsrun
uint ulType, // kind of underline
ref LSPOINT ptOrigin, // [in] drawing origin
int ulLength, // underline length
int ulThickness, // underline thickness
LsTFlow textFlow, // text flow direction
uint displayMode, // display mode
ref LSRECT clipRect // [in] clipping rectangle
)
{
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
if (!TextStore.IsContent(plsrun))
{
return LsErr.None;
}
lsrun = Draw.CurrentLine.GetRun(plsrun);
const uint locationMask = (1U << (int)TextDecorationLocation.Underline);
DrawTextDecorations(
lsrun,
locationMask,
ptOrigin.x, // left
ptOrigin.y, // underline top from LS
0, // overline top; not used
0, // strikethrough top; not used
0, // baseline top; not used
ulLength,
ulThickness,
textFlow
);
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("DrawUnderline", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
/// <summary>
/// Construct an lsrun
/// </summary>
private LSRun(
TextRunInfo runInfo,
IList<TextEffect> textEffects,
Plsrun type,
int offsetToFirstCp,
int textRunLength,
int emSize,
ushort charFlags,
CharacterBufferRange charBufferRange,
int baselineOffset,
int height,
TextShapeableSymbols shapeable,
byte bidiLevel
)
{
_runInfo = runInfo;
_type = type;
_offsetToFirstCp = offsetToFirstCp;
_textRunLength = textRunLength;
_emSize = emSize;
_charFlags = charFlags;
_charBufferRange = charBufferRange;
_baselineOffset = baselineOffset;
_height = height;
_bidiLevel = bidiLevel;
_shapeable = shapeable;
_textEffects = textEffects;
}
internal LsErr InlineDraw(
System.IntPtr pols, // Line Layout context
Plsrun plsrun, // plsrun
ref LSPOINT ptRun, // [in] pen position at which to render the object
LsTFlow textFlow, // text flow direction
int runWidth // object width
)
{
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
TextMetrics.FullTextLine currentLine = Draw.CurrentLine;
lsrun = currentLine.GetRun(plsrun);
LSPOINT lsrunOrigin = ptRun;
Debug.Assert(lsrun.Type == Plsrun.InlineObject);
int baseDirection = currentLine.RightToLeft ? 1 : 0;
int runDirection = (int)(lsrun.BidiLevel & 1);
if (baseDirection != 0)
{
lsrunOrigin.x = -lsrunOrigin.x;
}
TextEmbeddedObject textObject = lsrun.TextRun as TextEmbeddedObject;
Debug.Assert(textObject != null);
Debug.Assert(textFlow != LsTFlow.lstflowWS || runDirection != 0);
if ((baseDirection ^ runDirection) != 0)
{
lsrunOrigin.x -= runWidth;
}
Point baselineOrigin = new Point(
currentLine.Formatter.IdealToReal(currentLine.LSLineUToParagraphU(lsrunOrigin.x))+ Draw.VectorToLineOrigin.X,
currentLine.Formatter.IdealToReal((lsrunOrigin.y + lsrun.BaselineMoveOffset)) + Draw.VectorToLineOrigin.Y
);
Rect objectBounds = textObject.ComputeBoundingBox(
baseDirection != 0, // rightToLeft
false // no sideway support yet
);
if (!objectBounds.IsEmpty)
{
objectBounds.X += baselineOrigin.X;
objectBounds.Y += baselineOrigin.Y;
}
_boundingBox.Union(
new Rect(
LSRun.UVToXY(
Draw.LineOrigin,
new Point(),
objectBounds.Location.X,
objectBounds.Location.Y,
currentLine
),
LSRun.UVToXY(
Draw.LineOrigin,
new Point(),
objectBounds.Location.X + objectBounds.Size.Width,
objectBounds.Location.Y + objectBounds.Size.Height,
currentLine
)
)
);
DrawingContext drawingContext = Draw.DrawingContext;
if (drawingContext != null)
{
Draw.SetGuidelineY(baselineOrigin.Y);
try
{
if (Draw.AntiInversion == null)
{
textObject.Draw(
drawingContext,
LSRun.UVToXY(
Draw.LineOrigin,
new Point(),
baselineOrigin.X,
baselineOrigin.Y,
currentLine
),
baseDirection != 0,
false
);
}
else
{
drawingContext.PushTransform(Draw.AntiInversion);
try
{
textObject.Draw(drawingContext, baselineOrigin, baseDirection != 0, false);
}
finally
{
drawingContext.Pop();
}
}
}
finally
{
Draw.UnsetGuidelineY();
}
}
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("InlineDraw", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
internal LsErr InlineFormat(
System.IntPtr pols, // Line Layout context
Plsrun plsrun, // plsrun
int lscpInline, // first cp of the run
int currentPosition, // inline's current pen location in text direction
int rightMargin, // right margin
ref ObjDim pobjDim, // [out] object dimension
out int fFirstRealOnLine, // [out] is this run the first in line
out int fPenPositionUsed, // [out] is pen position used to format object
out LsBrkCond breakBefore, // [out] break condition before this object
out LsBrkCond breakAfter // [out] break condition after this object
)
{
LsErr lserr = LsErr.None;
LSRun lsrun = null;
fFirstRealOnLine = 0;
fPenPositionUsed = 0;
breakBefore = LsBrkCond.Please;
breakAfter = LsBrkCond.Please;
try
{
TextFormatterImp formatter = FullText.Formatter;
TextStore store = FullText.StoreFrom(plsrun);
lsrun = store.GetRun(plsrun);
TextEmbeddedObject textObject = lsrun.TextRun as TextEmbeddedObject;
Debug.Assert(textObject != null);
int cpInline = store.GetExternalCp(lscpInline);
fFirstRealOnLine = (cpInline == store.CpFirst) ? 1 : 0;
TextEmbeddedObjectMetrics metrics = store.FormatTextObject(
textObject,
cpInline,
currentPosition,
rightMargin
);
pobjDim = new ObjDim();
pobjDim.dur = TextFormatterImp.RealToIdeal(metrics.Width);
pobjDim.heightsRef.dvMultiLineHeight = TextFormatterImp.RealToIdeal(metrics.Height);
pobjDim.heightsRef.dvAscent = TextFormatterImp.RealToIdeal(metrics.Baseline);
pobjDim.heightsRef.dvDescent = pobjDim.heightsRef.dvMultiLineHeight - pobjDim.heightsRef.dvAscent;
pobjDim.heightsPres = pobjDim.heightsRef;
breakBefore = BreakConditionToLsBrkCond(textObject.BreakBefore);
breakAfter = BreakConditionToLsBrkCond(textObject.BreakAfter);
fPenPositionUsed = (!textObject.HasFixedSize) ? 1 : 0;
lsrun.BaselineOffset = pobjDim.heightsRef.dvAscent;
lsrun.Height = pobjDim.heightsRef.dvMultiLineHeight;
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("InlineFormat", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
internal unsafe LsErr DrawGlyphs(
IntPtr pols, // Line Layout context
Plsrun plsrun, // plsrun
char* pwchText, // character string
ushort* puClusterMap, // character-to-cluster map
ushort* puCharProperties, // character properties
int charCount, // character count
ushort* puGlyphs, // glyph indices
int* piJustifiedGlyphAdvances, // justified glyph advances
int* piGlyphAdvances, // original ideal glyph advances
GlyphOffset* piiGlyphOffsets, // glyph offsets
uint* piGlyphProperties, // glyph properties
LsExpType* plsExpType, // glyph expansion types
int glyphCount, // glyph count
LsTFlow textFlow, // text flow
uint displayMode, // draw transparent or opaque
ref LSPOINT ptRun, // [in] display position (at baseline)
ref LsHeights lsHeights, // [in] run height metrics
int runWidth, // run overall advance width
ref LSRECT clippingRect // [in] clipping rectangle if any applied
)
{
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
TextMetrics.FullTextLine currentLine = Draw.CurrentLine;
lsrun = currentLine.GetRun(plsrun);
Debug.Assert(TextStore.IsContent(plsrun) && lsrun.Shapeable != null);
GlyphRun glyphRun = ComputeShapedGlyphRun(
lsrun,
currentLine.Formatter,
true, // origin of the glyph run provided at drawing time
ptRun,
charCount,
pwchText,
puClusterMap,
glyphCount,
puGlyphs,
piJustifiedGlyphAdvances,
piiGlyphOffsets,
currentLine.IsJustified
);
if (glyphRun != null)
{
DrawingContext drawingContext = Draw.DrawingContext;
Draw.SetGuidelineY(glyphRun.BaselineOrigin.Y);
try
{
_boundingBox.Union(
lsrun.DrawGlyphRun(
drawingContext,
null, // draw with the run's foreground
glyphRun
)
);
}
finally
{
Draw.UnsetGuidelineY();
}
}
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("DrawGlyphs", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
internal LSRun(
TextRunInfo runInfo,
Plsrun type,
IntPtr controlChar,
int textRunLength,
int offsetToFirstCp,
byte bidiLevel
)
{
unsafe
{
_runInfo = runInfo;
_type = type;
_charBufferRange = new CharacterBufferRange((char*)controlChar, 1);
_textRunLength = textRunLength;
_offsetToFirstCp = offsetToFirstCp;
_bidiLevel = bidiLevel;
}
}
internal unsafe LsErr EnumText(
IntPtr pols, // ls context
Plsrun plsrun, // plsrun
int cpFirst, // first cp of the ls dnode
int dcp, // dcp of the dnode
char *pwchText, // characters for glyph run
int cchText, // length of characters
LsTFlow lstFlow, // flow direction
int fReverseOrder, // flag for reverse order enumeration
int fGeometryProvided, // flag for providing geometry
ref LSPOINT pptStart, // [in] logical start of the run
ref LsHeights pheights, // [in] height (iff geometryProvided)
int dupRun, // width of the run
int glyphBaseRun, // flag for glyph based run
int *piCharAdvances, // character advance widths (iff !glyphBaseRun)
ushort *puClusterMap, // cluster map (iff glyphBaseRun)
ushort *characterProperties, // character properties (iff glyphBaseRun)
ushort *puGlyphs, // glyph indices (iff glyphBaseRun)
int *piJustifiedGlyphAdvances, // glyph advances (iff glyphBaseRun)
GlyphOffset *piiGlyphOffsets, // glyph offsets (iff glyphBaseRun)
uint *piGlyphProperties, // glyph properties (iff glyphProperties)
int glyphCount // glyph count
)
{
Debug.Assert(fGeometryProvided == 0, "Line enumeration doesn't need geometry information");
if (cpFirst < 0)
{
return LsErr.None;
}
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
TextMetrics.FullTextLine currentLine = Draw.CurrentLine;
lsrun = currentLine.GetRun(plsrun);
GlyphRun glyphRun = null;
if (glyphBaseRun != 0)
{
if (glyphCount > 0)
{
glyphRun = ComputeShapedGlyphRun(
lsrun,
currentLine.Formatter,
false, // glyph run origin not provided
pptStart,
cchText,
pwchText,
puClusterMap,
glyphCount,
puGlyphs,
piJustifiedGlyphAdvances,
piiGlyphOffsets,
currentLine.IsJustified
);
}
}
else if (cchText > 0)
{
dupRun = 0;
for (int i = 0; i < cchText; i++)
{
dupRun += piCharAdvances[i];
}
glyphRun = ComputeUnshapedGlyphRun(
lsrun,
lstFlow,
currentLine.Formatter,
false, // glyph run origin not provided at enumeration
pptStart,
dupRun,
cchText,
pwchText,
piCharAdvances,
currentLine.IsJustified
);
}
if (glyphRun != null)
{
IndexedGlyphRuns.Add(
new IndexedGlyphRun(
currentLine.GetExternalCp(cpFirst),
dcp,
glyphRun
)
);
}
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("EnumText", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
internal unsafe LsErr DrawTextRun(
IntPtr pols, // Line Layout context
Plsrun plsrun, // plsrun
ref LSPOINT ptText, // [in] text origin
char* pwchText, // character string
int* piCharAdvances, // char advance widths
int cchText, // text length
LsTFlow textFlow, // text flow
uint displayMode, // draw in transparent or opaque
ref LSPOINT ptRun, // [in] run origin
ref LsHeights lsHeights, // [in] run height
int dupRun, // run length
ref LSRECT clipRect // [in] from DisplayLine's clip rectangle param
)
{
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
TextMetrics.FullTextLine currentLine = Draw.CurrentLine;
lsrun = currentLine.GetRun(plsrun);
GlyphRun glyphRun = ComputeUnshapedGlyphRun(
lsrun,
textFlow,
currentLine.Formatter,
true, // origin of the glyph run provided at drawing time
ptText,
dupRun,
cchText,
pwchText,
piCharAdvances,
currentLine.IsJustified
);
if (glyphRun != null)
{
DrawingContext drawingContext = Draw.DrawingContext;
Draw.SetGuidelineY(glyphRun.BaselineOrigin.Y);
try
{
_boundingBox.Union(
lsrun.DrawGlyphRun(
drawingContext,
null, // draw with the run's foreground brush
glyphRun
)
);
}
finally
{
Draw.UnsetGuidelineY();
}
}
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("DrawTextRun", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
/// <summary>
/// Get LSRun from plsrun
/// </summary>
internal LSRun GetRun(Plsrun plsrun)
{
ArrayList lsruns = _lsrunsMainText;
if (TextStore.IsMarker(plsrun))
{
lsruns = _lsrunsMarkerText;
}
plsrun = TextStore.ToIndex(plsrun);
return (LSRun)(
TextStore.IsContent(plsrun) ?
lsruns[(int)(plsrun - Plsrun.FormatAnchor)] :
TextStore.ControlRuns[(int)plsrun]
);
}
internal unsafe LsErr EnumTab(
IntPtr pols, // pointer to context
Plsrun plsrun, // plsrun
int cpFirst, // first cp of the dnode run
char *pwchText, // a single tab character
char tabLeader, // a single tab leader character
LsTFlow lstFlow, // flow direction
int fReverseOrder, // flag for reverse order enumeration
int fGeometryProvided, // flag for providing geometry information
ref LSPOINT pptStart, // [in] logical start of the run (iff geometryProvided)
ref LsHeights heights, // [in] height (iff geometryProvided)
int dupRun // width of the run
)
{
if (cpFirst < 0)
{
return LsErr.None;
}
LsErr lserr = LsErr.None;
LSRun lsrun = null;
try
{
TextMetrics.FullTextLine currentLine = Draw.CurrentLine;
lsrun = currentLine.GetRun(plsrun);
GlyphRun glyphRun = null;
if (lsrun.Type == Plsrun.Text)
{
int charWidth = 0;
lsrun.Shapeable.GetAdvanceWidthsUnshaped(
&tabLeader,
1,
TextFormatterImp.ToIdeal,
&charWidth
);
glyphRun = ComputeUnshapedGlyphRun(
lsrun,
lstFlow,
currentLine.Formatter,
false, // glyph run origin not provided at enumeration time
pptStart,
charWidth,
1,
&tabLeader,
&charWidth,
currentLine.IsJustified
);
}
if (glyphRun != null)
{
IndexedGlyphRuns.Add(
new IndexedGlyphRun(
currentLine.GetExternalCp(cpFirst),
1, // dcp is 1 for a Tab character
glyphRun
)
);
}
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("EnumTab", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
/// <summary>
/// Get a text store containing the specified plsrun
/// </summary>
internal TextStore StoreFrom(Plsrun plsrun)
{
return TextStore.IsMarker(plsrun) ? _markerStore : _store;
}
private void SaveException(Exception e, Plsrun plsrun, LSRun lsrun)
{
e.Data[ExceptionContext.Key] = new ExceptionContext(e.Data[ExceptionContext.Key], e.StackTrace, plsrun, lsrun);
_exception = e;
}
private void SaveNonCLSException(string methodName, Plsrun plsrun, LSRun lsrun)
{
Exception e = new System.Exception(SR.Get(SRID.NonCLSException));
e.Data[ExceptionContext.Key] = new ExceptionContext(null, methodName, plsrun, lsrun);
_exception = e;
}
public ExceptionContext(object innerContext, string stackTraceOrMethodName, Plsrun plsrun, LSRun lsrun)
{
_stackTraceOrMethodName = stackTraceOrMethodName;
_plsrun = (uint)plsrun;
_lsrun = lsrun;
_innerContext = innerContext;
}
/// <summary>
/// Fetch cached textrun
/// </summary>
internal TextRun FetchTextRun(
FormatSettings settings,
int cpFetch,
int cpFirst,
out int offsetToFirstCp,
out int runLength
)
{
SpanRider textRunSpanRider = new SpanRider(_textRunVector, _latestPosition, cpFetch);
_latestPosition = textRunSpanRider.SpanPosition;
TextRun textRun = (TextRun)textRunSpanRider.CurrentElement;
if (textRun == null)
{
// run not already cached, fetch new run and cache it
textRun = settings.TextSource.GetTextRun(cpFetch);
if (textRun.Length < 1)
{
throw new ArgumentOutOfRangeException("textRun.Length", SR.Get(SRID.ParameterMustBeGreaterThanZero));
}
Plsrun plsrun = TextRunInfo.GetRunType(textRun);
if (plsrun == Plsrun.Text || plsrun == Plsrun.InlineObject)
{
TextRunProperties properties = textRun.Properties;
if (properties == null)
{
throw new ArgumentException(SR.Get(SRID.TextRunPropertiesCannotBeNull));
}
if (properties.FontRenderingEmSize <= 0)
{
throw new ArgumentException(SR.Get(SRID.PropertyOfClassMustBeGreaterThanZero, "FontRenderingEmSize", "TextRunProperties"));
}
double realMaxFontRenderingEmSize = Constants.RealInfiniteWidth / Constants.GreatestMutiplierOfEm;
if (properties.FontRenderingEmSize > realMaxFontRenderingEmSize)
{
throw new ArgumentException(SR.Get(SRID.PropertyOfClassCannotBeGreaterThan, "FontRenderingEmSize", "TextRunProperties", realMaxFontRenderingEmSize));
}
CultureInfo culture = CultureMapper.GetSpecificCulture(properties.CultureInfo);
if (culture == null)
{
throw new ArgumentException(SR.Get(SRID.PropertyOfClassCannotBeNull, "CultureInfo", "TextRunProperties"));
}
if (properties.Typeface == null)
{
throw new ArgumentException(SR.Get(SRID.PropertyOfClassCannotBeNull, "Typeface", "TextRunProperties"));
}
}
//
// TextRun is specifial to SpanVector because TextRun also encodes position which needs to be
// consistent with the positions encoded by SpanVector. In run cache, the begining of a span
// should always correspond to the begining of a cached text run. If the end of the currently fetched
// run overlaps with the begining of an already cached run, the begining of the cached run needs to be
// adjusted as well as its span. Because we can't gurantee the correctness of the overlapped range
// so we'll simply remove the overlapped runs here.
//
// Move the rider to the end of the current run
textRunSpanRider.At(cpFetch + textRun.Length - 1);
_latestPosition = textRunSpanRider.SpanPosition;
if (textRunSpanRider.CurrentElement != _textRunVector.Default)
{
// The end overlaps with one or more cached runs, clear the range from the
// begining of the current fetched run to the end of the last overlapped cached run.
_latestPosition = _textRunVector.SetReference(
cpFetch,
textRunSpanRider.CurrentPosition + textRunSpanRider.Length - cpFetch,
_textRunVector.Default,
_latestPosition
);
}
_latestPosition = _textRunVector.SetReference(cpFetch, textRun.Length, textRun, _latestPosition);
// Refresh the rider's SpanPosition following previous SpanVector.SetReference calls
textRunSpanRider.At(_latestPosition, cpFetch);
}
// If the TextRun was obtained from the cache, make sure it has the right PixelsPerDip set on its properties.
if (textRun.Properties != null)
{
textRun.Properties.PixelsPerDip = settings.TextSource.PixelsPerDip;
}
offsetToFirstCp = textRunSpanRider.CurrentPosition - textRunSpanRider.CurrentSpanStart;
runLength = textRunSpanRider.Length;
Debug.Assert(textRun != null && runLength > 0, "Invalid run!");
bool isText = textRun is ITextSymbols;
if (isText)
{
// Chop text run to optimal length so we dont spend forever analysing
// them all at once.
int looseCharLength = TextStore.TypicalCharactersPerLine - cpFetch + cpFirst;
if (looseCharLength <= 0)
{
// this line already exceeds typical line length, incremental fetch goes
// about a quarter of the typical length.
looseCharLength = (int)Math.Round(TextStore.TypicalCharactersPerLine * 0.25);
}
if (runLength > looseCharLength)
{
if (TextRunInfo.GetRunType(textRun) == Plsrun.Text)
{
//
// When chopping the run at the typical line length,
// - don't chop in between of higher & lower surrogate
// - don't chop combining mark away from its base character
// - don't chop joiner from surrounding characters
//
// Starting from the initial chopping point, we look ahead to find a safe position. We stop at
// a limit in case the run consists of many combining mark & joiner. That is rare and doesn't make
// much sense in shaping already.
//
CharacterBufferReference charBufferRef = textRun.CharacterBufferReference;
// We look ahead by one more line at most. It is not normal to have
// so many combining mark or joiner characters in a row. It doesn't make sense to
// look further if so.
int lookAheadLimit = Math.Min(runLength, looseCharLength + TextStore.TypicalCharactersPerLine);
int sizeOfChar = 0;
int endOffset = 0;
bool canBreakAfterPrecedingChar = false;
for (endOffset = looseCharLength - 1; endOffset < lookAheadLimit; endOffset += sizeOfChar)
{
CharacterBufferRange charString = new CharacterBufferRange(
charBufferRef.CharacterBuffer,
charBufferRef.OffsetToFirstChar + offsetToFirstCp + endOffset,
runLength - endOffset
);
int ch = Classification.UnicodeScalar(charString, out sizeOfChar);
// We can only safely break if the preceding char is not a joiner character (i.e. can-break-after),
// and the current char is not combining or joiner (i.e. can-break-before).
if (canBreakAfterPrecedingChar && !Classification.IsCombining(ch) && !Classification.IsJoiner(ch))
{
break;
}
canBreakAfterPrecedingChar = !Classification.IsJoiner(ch);
}
looseCharLength = Math.Min(runLength, endOffset);
}
runLength = looseCharLength;
}
}
Debug.Assert(
// valid run found
runLength > 0
// non-text run always fetched at run start
&& (isText ||
textRunSpanRider.CurrentSpanStart - textRunSpanRider.CurrentPosition == 0)
// span rider of both text and format point to valid position
&& (textRunSpanRider.Length > 0 && textRunSpanRider.CurrentElement != null),
"Text run fetching error!"
);
return(textRun);
}
/// <summary>
/// Constructing a textrun info
/// </summary>
/// <param name="charBufferRange">characte buffer range for the run</param>
/// <param name="textRunLength">textrun length</param>
/// <param name="offsetToFirstCp">character offset to run first cp</param>
/// <param name="textRun">text run</param>
/// <param name="lsRunType">the internal LS run type </param>
/// <param name="charFlags">character attribute flags</param>
/// <param name="digitCulture">digit culture for the run</param>
/// <param name="contextualSubstitution">contextual number substitution for the run</param>
/// <param name="symbolTypeface">if true, indicates a text run in a symbol (i.e., non-Unicode) font</param>
/// <param name="modifierScope">The current TextModifier scope for this TextRunInfo</param>
internal TextRunInfo(
CharacterBufferRange charBufferRange,
int textRunLength,
int offsetToFirstCp,
TextRun textRun,
Plsrun lsRunType,
ushort charFlags,
CultureInfo digitCulture,
bool contextualSubstitution,
bool symbolTypeface,
TextModifierScope modifierScope
)
{
_charBufferRange = charBufferRange;
_textRunLength = textRunLength;
_offsetToFirstCp = offsetToFirstCp;
_textRun = textRun;
_plsrun = lsRunType;
_charFlags = charFlags;
_digitCulture = digitCulture;
_runFlags = 0;
_modifierScope = modifierScope;
if (contextualSubstitution)
{
_runFlags |= (ushort)RunFlags.ContextualSubstitution;
}
if (symbolTypeface)
{
_runFlags |= (ushort)RunFlags.IsSymbol;
}
}
