internal FormatSettings(
TextFormatterImp formatter,
TextSource textSource,
TextRunCacheImp runCache,
ParaProp pap,
TextLineBreak previousLineBreak,
bool isSingleLineFormatting,
TextFormattingMode textFormattingMode,
bool isSideways
)
{
_isSideways = isSideways;
_textFormattingMode = textFormattingMode;
_formatter = formatter;
_textSource = textSource;
_runCache = runCache;
_pap = pap;
_digitState = new DigitState();
_previousLineBreak = previousLineBreak;
_maxLineWidth = Constants.IdealInfiniteWidth;
if (isSingleLineFormatting)
{
// Apply text indent on each line in single line mode
_textIndent = _pap.Indent;
}
}
// ------------------------------------------------------------------
// Constructor.
//
// wrappingWidth - wrapping width for the line
// length - number or characters in the line
// width - width of the line
// height - height of the line
// baseline - baseline of the line
// hasInlineObjects - has inline objects?
// ------------------------------------------------------------------
internal LineMetrics(
#if DEBUG
double wrappingWidth,
#endif
int length,
double width,
double height,
double baseline,
bool hasInlineObjects,
TextLineBreak textLineBreak)
{
#if DEBUG
_wrappingWidth = wrappingWidth;
#endif
_start = 0;
_width = width;
_height = height;
_baseline = baseline;
_textLineBreak = textLineBreak;
_packedData = ((uint) length & LengthMask) | (hasInlineObjects ? HasInlineObjectsMask : 0);
}
/// <summary>
/// Client to format a text line that fills a paragraph in the document.
/// </summary>
/// <param name="textSource">an object representing text layout clients text source for TextFormatter.</param>
/// <param name="firstCharIndex">character index to specify where in the source text the line starts</param>
/// <param name="paragraphWidth">width of paragraph in which the line fills</param>
/// <param name="paragraphProperties">properties that can change from one paragraph to the next, such as text flow direction, text alignment, or indentation.</param>
/// <param name="previousLineBreak">text formatting state at the point where the previous line in the paragraph
/// was broken by the text formatting process, as specified by the TextLine.LineBreak property for the previous
/// line; this parameter can be null, and will always be null for the first line in a paragraph.</param>
/// <param name="textRunCache">an object representing content cache of the client.</param>
/// <returns>object representing a line of text that client interacts with. </returns>
public abstract TextLine FormatLine(
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache
);
internal static IList<TextBreakpoint> CreateMultiple(
TextParagraphCache paragraphCache,
int firstCharIndex,
int maxLineWidth,
TextLineBreak previousLineBreak,
IntPtr penaltyRestriction,
out int bestFitIndex
)
{
Invariant.Assert(paragraphCache != null);
// grab full text state from paragraph cache
FullTextState fullText = paragraphCache.FullText;
Invariant.Assert(fullText != null);
FormatSettings settings = fullText.TextStore.Settings;
Invariant.Assert(settings != null);
// update formatting parameters at line start
settings.UpdateSettingsForCurrentLine(
maxLineWidth,
previousLineBreak,
(firstCharIndex == fullText.TextStore.CpFirst)
);
Invariant.Assert(settings.Formatter != null);
// acquiring LS context
TextFormatterContext context = settings.Formatter.AcquireContext(fullText, IntPtr.Zero);
IntPtr previousBreakRecord = IntPtr.Zero;
if (settings.PreviousLineBreak != null)
previousBreakRecord = settings.PreviousLineBreak.BreakRecord.Value;
// need not consider marker as tab since marker does not affect line metrics and it wasnt drawn.
fullText.SetTabs(context);
LsBreaks lsbreaks = new LsBreaks();
LsErr lserr = context.CreateBreaks(
fullText.GetBreakpointInternalCp(firstCharIndex),
previousBreakRecord,
paragraphCache.Ploparabreak.Value, // para breaking session
penaltyRestriction,
ref lsbreaks,
out bestFitIndex
);
// get the exception in context before it is released
Exception callbackException = context.CallbackException;
// release the context
context.Release();
if(lserr != LsErr.None)
{
if(callbackException != null)
{
// rethrow exception thrown in callbacks
throw callbackException;
}
else
{
// throw with LS error codes
TextFormatterContext.ThrowExceptionFromLsError(SR.Get(SRID.CreateBreaksFailure, lserr), lserr);
}
}
// keep context alive at least till here
GC.KeepAlive(context);
TextBreakpoint[] breakpoints = new TextBreakpoint[lsbreaks.cBreaks];
for (int i = 0; i < lsbreaks.cBreaks; i++)
{
breakpoints[i] = new FullTextBreakpoint(
fullText,
firstCharIndex,
maxLineWidth,
ref lsbreaks,
i // the current break
);
}
return breakpoints;
}
/// <summary>
/// Update formatting parameters at line start
/// </summary>
internal void UpdateSettingsForCurrentLine(
int maxLineWidth,
TextLineBreak previousLineBreak,
bool isFirstLineInPara
)
{
_previousLineBreak = previousLineBreak;
_digitState = new DigitState(); // reset digit state
_maxLineWidth = Math.Max(maxLineWidth, 0);
if (isFirstLineInPara)
{
_textIndent = _pap.Indent;
}
else
{
// Do not apply text indentation to all but the first line in para
_textIndent = 0;
}
}
public TextLine FormatLine(TextSource textSource, int firstCharIndex, double paragraphWidth,
TextParagraphProperties paragraphProperties, TextLineBreak previousLineBreak) {
return formatter.FormatLine(textSource, firstCharIndex, paragraphWidth, paragraphProperties, previousLineBreak);
}
// ------------------------------------------------------------------
// Create and format text line.
//
// lineStartIndex - index of the first character in the line
// width - wrapping width of the line
// lineProperties - properties of the line
// textRunCache - run cache used by text formatter
// showParagraphEllipsis - true if paragraph ellipsis is shown
// at the end of the line
// ------------------------------------------------------------------
internal void Format(int dcp, double width, TextParagraphProperties lineProperties, TextLineBreak textLineBreak, TextRunCache textRunCache, bool showParagraphEllipsis)
{
#if TEXTPANELLAYOUTDEBUG
TextPanelDebug.IncrementCounter("Line.Format", TextPanelDebug.Category.TextView);
#endif
_mirror = (lineProperties.FlowDirection == FlowDirection.RightToLeft);
_dcp = dcp;
_showParagraphEllipsis = showParagraphEllipsis;
_wrappingWidth = width;
_line = _owner.TextFormatter.FormatLine(this, dcp, width, lineProperties, textLineBreak, textRunCache);
}
internal LineEnumerator(FormattedText text)
{
_previousHeight = 0;
_previousLength = 0;
_previousLineBreak = null;
_textStorePosition = 0;
_lineCount = 0;
_totalHeight = 0;
_currentLine = null;
_nextLine = null;
_formatter = TextFormatter.FromCurrentDispatcher(text._textFormattingMode);
_that = text;
if (_that._textSourceImpl == null)
_that._textSourceImpl = new TextSourceImplementation(_that);
}
internal override TextParagraphCache CreateParagraphCache(
#endif
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache
)
{
// prepare formatting settings
FormatSettings settings = PrepareFormatSettings(
textSource,
firstCharIndex,
paragraphWidth,
paragraphProperties,
previousLineBreak,
textRunCache,
true, // optimalBreak
false, // !isSingleLineFormatting
_textFormattingMode
);
//
// Optimal paragraph formatting session specific check
//
if (!settings.Pap.Wrap && settings.Pap.OptimalBreak)
{
// Optimal paragraph must wrap.
throw new ArgumentException(SR.Get(SRID.OptimalParagraphMustWrap));
}
// create paragraph content cache object
return new TextParagraphCache(
settings,
firstCharIndex,
RealToIdeal(paragraphWidth)
);
}
/// <summary>
/// Format and produce a text line either with or without previously known
/// line break point.
/// </summary>
private TextLine FormatLineInternal(
TextSource textSource,
int firstCharIndex,
int lineLength,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache
)
{
EventTrace.EasyTraceEvent(EventTrace.Keyword.KeywordText, EventTrace.Level.Verbose, EventTrace.Event.WClientStringBegin, "TextFormatterImp.FormatLineInternal Start");
// prepare formatting settings
FormatSettings settings = PrepareFormatSettings(
textSource,
firstCharIndex,
paragraphWidth,
paragraphProperties,
previousLineBreak,
textRunCache,
(lineLength != 0), // Do optimal break if break is given
true, // isSingleLineFormatting
_textFormattingMode
);
TextLine textLine = null;
if ( !settings.Pap.AlwaysCollapsible
&& previousLineBreak == null
&& lineLength <= 0
)
{
// simple text line.
textLine = SimpleTextLine.Create(
settings,
firstCharIndex,
RealToIdealFloor(paragraphWidth)
) as TextLine;
}
if (textLine == null)
{
// content is complex, creating complex line
textLine = new TextMetrics.FullTextLine(
settings,
firstCharIndex,
lineLength,
RealToIdealFloor(paragraphWidth),
LineFlags.None
) as TextLine;
}
EventTrace.EasyTraceEvent(EventTrace.Keyword.KeywordText, EventTrace.Level.Verbose, EventTrace.Event.WClientStringEnd, "TextFormatterImp.FormatLineInternal End");
return textLine;
}
internal override TextLine RecreateLine(
#endif
TextSource textSource,
int firstCharIndex,
int lineLength,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache
)
{
return FormatLineInternal(
textSource,
firstCharIndex,
lineLength,
paragraphWidth,
paragraphProperties,
previousLineBreak,
textRunCache
);
}
/// <summary>
/// Client to format a text line that fills a paragraph in the document.
/// </summary>
/// <param name="textSource">an object representing text layout clients text source for TextFormatter.</param>
/// <param name="firstCharIndex">character index to specify where in the source text the line starts</param>
/// <param name="paragraphWidth">width of paragraph in which the line fills</param>
/// <param name="paragraphProperties">properties that can change from one paragraph to the next, such as text flow direction, text alignment, or indentation.</param>
/// <param name="previousLineBreak">LineBreak property of the previous text line, or null if this is the first line in the paragraph</param>
/// <param name="textRunCache">an object representing content cache of the client.</param>
/// <returns>object representing a line of text that client interacts with. </returns>
public override TextLine FormatLine(
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache
)
{
return FormatLineInternal(
textSource,
firstCharIndex,
0, // lineLength
paragraphWidth,
paragraphProperties,
previousLineBreak,
textRunCache
);
}
/// <summary>
/// Client to format a text line that fills a paragraph in the document.
/// </summary>
/// <param name="textSource">an object representing text layout clients text source for TextFormatter.</param>
/// <param name="firstCharIndex">character index to specify where in the source text the line starts</param>
/// <param name="paragraphWidth">width of paragraph in which the line fills</param>
/// <param name="paragraphProperties">properties that can change from one paragraph to the next, such as text flow direction, text alignment, or indentation.</param>
/// <param name="previousLineBreak">LineBreak property of the previous text line, or null if this is the first line in the paragraph</param>
/// <returns>object representing a line of text that client interacts with. </returns>
public override TextLine FormatLine(
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak
)
{
return FormatLineInternal(
textSource,
firstCharIndex,
0, // lineLength
paragraphWidth,
paragraphProperties,
previousLineBreak,
new TextRunCache() // local cache, only live within this call
);
}
/// <summary>
/// Client to format all feasible breakpoints for a line started at the specified character position.
/// The number of breakpoints returned is restricted by penalty restr
/// </summary>
/// <remarks>
/// This method is provided for direct access of PTS during optimal paragraph process. The breakpoint
/// restriction handle is passed as part of the parameter to PTS callback pfnFormatLineVariants. The
/// value comes from earlier steps in PTS code to compute the accumulated penalty of the entire paragraph
/// using 'best-fit' algorithm.
/// </remarks>
internal IList<TextBreakpoint> FormatBreakpoints(
int firstCharIndex,
TextLineBreak previousLineBreak,
IntPtr breakpointRestrictionHandle,
double maxLineWidth,
out int bestFitIndex
)
{
// format all potential breakpoints starting from the specified firstCharIndex.
// The number of breakpoints returned is restricted by penaltyRestriction.
return FullTextBreakpoint.CreateMultiple(
this,
firstCharIndex,
VerifyMaxLineWidth(maxLineWidth),
previousLineBreak,
breakpointRestrictionHandle,
out bestFitIndex
);
}
[FriendAccessAllowed] // used by Framework
internal abstract TextParagraphCache CreateParagraphCache(
#endif
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache
);
/// <summary>
/// Wrapper of TextFormatter.FormatLine that auto-collapses the line if needed.
/// </summary>
private TextLine FormatLine(TextSource textSource, int textSourcePosition, double maxLineLength, TextParagraphProperties paraProps, TextLineBreak lineBreak)
{
TextLine line = _formatter.FormatLine(
textSource,
textSourcePosition,
maxLineLength,
paraProps,
lineBreak
);
if (_that._trimming != TextTrimming.None && line.HasOverflowed && line.Length > 0)
{
// what I really need here is the last displayed text run of the line
// textSourcePosition + line.Length - 1 works except the end of paragraph case,
// where line length includes the fake paragraph break run
Debug.Assert(_that._text.Length > 0 && textSourcePosition + line.Length <= _that._text.Length + 1);
SpanRider thatFormatRider = new SpanRider(
_that._formatRuns,
_that._latestPosition,
Math.Min(textSourcePosition + line.Length - 1, _that._text.Length - 1)
);
GenericTextRunProperties lastRunProps = thatFormatRider.CurrentElement as GenericTextRunProperties;
TextCollapsingProperties trailingEllipsis;
if (_that._trimming == TextTrimming.CharacterEllipsis)
trailingEllipsis = new TextTrailingCharacterEllipsis(maxLineLength, lastRunProps);
else
{
Debug.Assert(_that._trimming == TextTrimming.WordEllipsis);
trailingEllipsis = new TextTrailingWordEllipsis(maxLineLength, lastRunProps);
}
TextLine collapsedLine = line.Collapse(trailingEllipsis);
if (collapsedLine != line)
{
line.Dispose();
line = collapsedLine;
}
}
return line;
}
/// <summary>
/// Validate all the relevant text formatting initial settings and package them
/// </summary>
private FormatSettings PrepareFormatSettings(
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache,
bool useOptimalBreak,
bool isSingleLineFormatting,
TextFormattingMode textFormattingMode
)
{
VerifyTextFormattingArguments(
textSource,
firstCharIndex,
paragraphWidth,
paragraphProperties,
textRunCache
);
if (textRunCache.Imp == null)
{
// No run cache object available, create one
textRunCache.Imp = new TextRunCacheImp();
}
// initialize formatting settings
return new FormatSettings(
this,
textSource,
textRunCache.Imp,
new ParaProp(this, paragraphProperties, useOptimalBreak),
previousLineBreak,
isSingleLineFormatting,
textFormattingMode,
false
);
}
/// <summary>
/// Advances the enumerator to the next text line of the collection
/// </summary>
/// <returns>true if the enumerator was successfully advanced to the next element;
/// false if the enumerator has passed the end of the collection</returns>
public bool MoveNext()
{
if (_currentLine == null)
{ // this is the first line
if (_that._text.Length == 0)
return false;
_currentLine = FormatLine(
_that._textSourceImpl,
_textStorePosition,
MaxLineLength(_lineCount),
_that._defaultParaProps,
null // no previous line break
);
// check if this line fits the text height
if (_totalHeight + _currentLine.Height > _that._maxTextHeight)
{
_currentLine.Dispose();
_currentLine = null;
return false;
}
Debug.Assert(_nextLine == null);
}
else
{
// there is no next line or it didn't fit
// either way we're finished
if (_nextLine == null)
return false;
_totalHeight += _previousHeight;
_textStorePosition += _previousLength;
++_lineCount;
_currentLine = _nextLine;
_nextLine = null;
}
TextLineBreak currentLineBreak = _currentLine.GetTextLineBreak();
// this line is guaranteed to fit the text height
Debug.Assert(_totalHeight + _currentLine.Height <= _that._maxTextHeight);
// now, check if the next line fits, we need to do this on this iteration
// because we might need to add ellipsis to the current line
// as a result of the next line measurement
// maybe there is no next line at all
if (_textStorePosition + _currentLine.Length < _that._text.Length)
{
bool nextLineFits;
if (_lineCount + 1 >= _that._maxLineCount)
nextLineFits = false;
else
{
_nextLine = FormatLine(
_that._textSourceImpl,
_textStorePosition + _currentLine.Length,
MaxLineLength(_lineCount + 1),
_that._defaultParaProps,
currentLineBreak
);
nextLineFits = (_totalHeight + _currentLine.Height + _nextLine.Height <= _that._maxTextHeight);
}
if (!nextLineFits)
{
// next line doesn't fit
if (_nextLine != null)
{
_nextLine.Dispose();
_nextLine = null;
}
if (_that._trimming != TextTrimming.None && !_currentLine.HasCollapsed)
{
// recreate the current line with ellipsis added
// Note: Paragraph ellipsis is not supported today. We'll workaround
// it here by faking a non-wrap text on finite column width.
TextWrapping currentWrap = _that._defaultParaProps.TextWrapping;
_that._defaultParaProps.SetTextWrapping(TextWrapping.NoWrap);
if (currentLineBreak != null)
currentLineBreak.Dispose();
_currentLine.Dispose();
_currentLine = FormatLine(
_that._textSourceImpl,
_textStorePosition,
MaxLineLength(_lineCount),
_that._defaultParaProps,
_previousLineBreak
);
currentLineBreak = _currentLine.GetTextLineBreak();
_that._defaultParaProps.SetTextWrapping(currentWrap);
}
}
}
_previousHeight = _currentLine.Height;
_previousLength = _currentLine.Length;
if (_previousLineBreak != null)
_previousLineBreak.Dispose();
_previousLineBreak = currentLineBreak;
return true;
}
// -----------------------------------------------------------------
//
// Internal Methods
//
// ------------------------------------------------------------------
#region Internal Methods
/// <summary>
/// Create and format text line.
/// </summary>
/// <param name="ctx">
/// Line formatting context.
/// </param>
/// <param name="dcp">
/// Character position where the line starts.
/// </param>
/// <param name="width">
/// Requested width of the line.
/// </param>
/// <param name="trackWidth">
/// Requested width of track.
/// </param>
/// <param name="lineProps">
/// Line properties.
/// </param>
/// <param name="textLineBreak">
/// Line break object.
/// </param>
internal void Format(FormattingContext ctx, int dcp, int width, int trackWidth, TextParagraphProperties lineProps, TextLineBreak textLineBreak)
{
// Set formatting context
_formattingContext = ctx;
_dcp = dcp;
_host.Context = this;
_wrappingWidth = TextDpi.FromTextDpi(width);
_trackWidth = TextDpi.FromTextDpi(trackWidth);
_mirror = (lineProps.FlowDirection == FlowDirection.RightToLeft);
_indent = lineProps.Indent;
try
{
// Create line object
if(ctx.LineFormatLengthTarget == -1)
{
_line = _host.TextFormatter.FormatLine(_host, dcp, _wrappingWidth, lineProps, textLineBreak, ctx.TextRunCache);
}
else
{
_line = _host.TextFormatter.RecreateLine(_host, dcp, ctx.LineFormatLengthTarget, _wrappingWidth, lineProps, textLineBreak, ctx.TextRunCache);
}
_runs = _line.GetTextRunSpans();
Invariant.Assert(_runs != null, "Cannot retrieve runs collection.");
// Submit inline objects (only in measure mode)
if (_formattingContext.MeasureMode)
{
List<InlineObject> inlineObjects = new List<InlineObject>(1);
int dcpRun = _dcp;
// Enumerate through all runs in the current line and retrieve
// all inline objects.
// If there are any figures / floaters, store this information for later use.
foreach (TextSpan<TextRun> textSpan in _runs)
{
TextRun run = (TextRun)textSpan.Value;
if (run is InlineObjectRun)
{
inlineObjects.Add(new InlineObject(dcpRun, ((InlineObjectRun)run).UIElementIsland, (TextParagraph)_paraClient.Paragraph));
}
else if (run is FloatingRun)
{
if (((FloatingRun)run).Figure)
{
_hasFigures = true;
}
else
{
_hasFloaters = true;
}
}
// Do not use TextRun.Length, because it gives total length of the run.
// So, if the run is broken between lines, it gives incorrect value.
// Use length of the TextSpan instead, which gives the correct length here.
dcpRun += textSpan.Length;
}
// Submit inline objects to the paragraph cache
if (inlineObjects.Count == 0)
{
inlineObjects = null;
}
TextParagraph.SubmitInlineObjects(dcp, dcp + ActualLength, inlineObjects);
}
}
finally
{
// Clear formatting context
_host.Context = null;
}
}
// ------------------------------------------------------------------
// Constructor.
//
// PtsContext - Context
// TextLineBreak - Contained line break
// ------------------------------------------------------------------
internal LineBreakRecord(PtsContext ptsContext, TextLineBreak textLineBreak) : base(ptsContext)
{
_textLineBreak = textLineBreak;
}
public TextLine FormatLine(TextSource textSource, int firstCharIndex, double paragraphWidth, TextParagraphProperties paragraphProperties, TextLineBreak previousLineBreak) {
var runs = new List<Tuple<TextRun, GlyphRun, int, double>>();
int index = firstCharIndex;
double x = paragraphProperties.Indent, height = 0, baseline = 0;
double trailWhitespaceWidth = 0;
while (true) {
var run = textSource.GetTextRun(index);
var textProps = run.Properties ?? paragraphProperties.DefaultTextRunProperties;
var fontSize = textProps.FontRenderingEmSize;
var len = run.Length;
if (textProps != null) {
height = Math.Max(height, (int)(textProps.Typeface.FontFamily.LineSpacing * fontSize));
baseline = Math.Max(baseline, (int)(textProps.Typeface.FontFamily.Baseline * fontSize));
}
if (run is TextEndOfLine || run == null) {
index += len;
runs.Add(Tuple.Create(run, (GlyphRun)null, 0, 0.0));
break;
}
else if (run is TextCharacters) {
var chrs = (TextCharacters)run;
var charBuf = getCharBuf(chrs.CharacterBufferReference);
var charOffset = getCharOffset(chrs.CharacterBufferReference);
GlyphTypeface gl;
if (!textProps.Typeface.TryGetGlyphTypeface(out gl))
throw new Exception("GlyphTypeface does not exists for font '" + textProps.Typeface.FontFamily + "'.");
ushort[] glyphIndexes = new ushort[len];
double[] advanceWidths = new double[len];
double totalWidth = 0;
int trailWhitespace = 0;
trailWhitespaceWidth = 0;
for (int n = 0; n < len; n++) {
var c = charBuf[charOffset + n];
ushort glyphIndex;
double width;
if (c == '\t') {
glyphIndex = gl.CharacterToGlyphMap[' '];
width = paragraphProperties.DefaultIncrementalTab - x % paragraphProperties.DefaultIncrementalTab;
}
else {
if (!gl.CharacterToGlyphMap.TryGetValue(c, out glyphIndex))
glyphIndex = gl.CharacterToGlyphMap['?'];
width = gl.AdvanceWidths[glyphIndex] * fontSize;
}
glyphIndexes[n] = glyphIndex;
advanceWidths[n] = width;
if (char.IsWhiteSpace(c)) {
trailWhitespace++;
trailWhitespaceWidth += width;
}
else {
totalWidth += trailWhitespaceWidth + width;
trailWhitespaceWidth = 0;
trailWhitespace = 0;
}
}
var origin = new Point(x, 0);
var glyphRun = new GlyphRun(
gl, 0, false, fontSize, glyphIndexes, origin, advanceWidths,
null, null, null, null, null, null);
runs.Add(Tuple.Create(run, glyphRun, trailWhitespace, trailWhitespaceWidth));
x += totalWidth + trailWhitespaceWidth;
index += len;
}
else if (run is TextEmbeddedObject) {
var obj = (TextEmbeddedObject)run;
var metrics = obj.Format(paragraphWidth - x);
runs.Add(Tuple.Create(run, (GlyphRun)null, 0, metrics.Width));
height = Math.Max(height, obj.Format(paragraphWidth - x).Height);
x += metrics.Width;
index += len;
}
}
return new GlyphRunLine {
entries = runs.ToArray(),
baseline = baseline,
width = x - trailWhitespaceWidth,
height = height,
mode = mode
};
}
