public override void VisitTextElement(SvgTextElement element)
{
base.VisitTextElement(element);
var fonts = SystemFonts.Collection;
fonts.TryGet(DefaultFont, out FontFamily family);
foreach (var f in element.Style.FontFamily.Value)
{
var fontName = f;
if (fontName.Equals("sans-serif"))
{
fontName = DefaultSansSerifFont;
}
else if (fontName.Equals("serif"))
{
fontName = DefaultSerifFont;
}
if (fonts.TryGet(fontName, out family))
{
break;
}
}
if (family == null)
{
fonts.TryGet(DefaultFont, out family);
}
var fontSize = element.Style.FontSize.Value.Value;
var origin = new PointF(element.X?.Value ?? 0, element.Y?.Value ?? 0);
var font = new Font(family, fontSize);
var visitor = new SvgTextSpanTextVisitor();
element.Accept(visitor);
var text = visitor.Text;
// offset by the ascender to account for fonts render origin of top left
var ascender = ((font.FontMetrics.Ascender * font.Size) / (font.FontMetrics.UnitsPerEm * 72)) * 72;
var render = new TextOptions(font)
{
Dpi = 72,
Origin = origin - new PointF(0, ascender),
HorizontalAlignment = element.Style.TextAnchor.Value.AsHorizontalAlignment()
};
var glyphs = TextBuilder.GenerateGlyphs(text, render);
foreach (var p in glyphs)
{
this.RenderShapeToCanvas(element, p);
}
}
private void RenderTSpanPath(SvgTSpanElement element, WpfTextOnPathDrawing pathDrawing,
ref Point ctp)
{
WpfTextPlacement placement = GetCurrentTextPosition(element, ctp);
ctp = placement.Location;
double rotate = placement.Rotation;
if (!placement.HasPositions)
{
placement = null; // Render it useless.
}
string sBaselineShift = element.GetPropertyValue("baseline-shift").Trim();
double shiftBy = 0;
if (sBaselineShift.Length > 0)
{
SvgTextElement textElement = (SvgTextElement)element.SelectSingleNode("ancestor::svg:text",
element.OwnerDocument.NamespaceManager);
double textFontSize = GetComputedFontSize(textElement);
if (sBaselineShift.EndsWith("%", StringComparison.OrdinalIgnoreCase))
{
shiftBy = SvgNumber.ParseNumber(sBaselineShift.Substring(0,
sBaselineShift.Length - 1)) / 100f * textFontSize;
}
else if (sBaselineShift == "sub")
{
shiftBy = -0.6F * textFontSize;
}
else if (sBaselineShift == "super")
{
shiftBy = 0.6F * textFontSize;
}
else if (sBaselineShift == "baseline")
{
shiftBy = 0;
}
else
{
shiftBy = SvgNumber.ParseNumber(sBaselineShift);
}
}
foreach (XmlNode child in element.ChildNodes)
{
if (child.NodeType == XmlNodeType.Text)
{
ctp.Y -= shiftBy;
RenderTextPath(element, pathDrawing, GetText(element, child),
new Point(ctp.X, ctp.Y), rotate, placement);
ctp.Y += shiftBy;
}
}
}
private void RenderTextPath(SvgTextElement element, SvgTextPathElement textPath,
ref Point ctp, double rotate, WpfTextPlacement placement)
{
if (_pathRenderer == null)
{
return;
}
_pathRenderer.RenderSingleLineText(textPath, ref ctp, String.Empty, rotate, placement);
}
public override void VisitTextElement(SvgTextElement element)
{
base.VisitTextElement(element);
var fonts = SystemFonts.Collection;
FontFamily family = null;
foreach (var f in element.Style.FontFamily.Value)
{
var fontName = f;
if (fontName.Equals("sans-serif"))
{
fontName = DefaultSansSerifFont;
}
else if (fontName.Equals("serif"))
{
fontName = DefaultSerifFont;
}
if (fonts.TryFind(fontName, out family))
{
break;
}
}
if (ReferenceEquals(family, null)) //FontFamily overrides == operator and can't handle 'null' value on the left.
{
family = fonts.Find(DefaultFont);
}
var fontSize = element.Style.FontSize.Value.Value;
var origin = new PointF(element.X?.Value ?? 0, element.Y?.Value ?? 0);
var font = family.CreateFont(fontSize);
var visitor = new SvgTextSpanTextVisitor();
element.Accept(visitor);
var text = visitor.Text;
// offset by the ascender to account for fonts render origin of top left
var ascender = ((font.Ascender * font.Size) / (font.EmSize * 72)) * 72;
var render = new RendererOptions(font, 72, origin - new PointF(0, ascender))
{
HorizontalAlignment = element.Style.TextAnchor.Value.AsHorizontalAlignment()
};
var glyphs = TextBuilder.GenerateGlyphs(text, render);
foreach (var p in glyphs)
{
this.RenderShapeToCanvas(element, p);
}
}
public WpfTextRendering(SvgElement element)
: base(element)
{
_textElement = element as SvgTextElement;
if (_textElement == null)
{
throw new InvalidOperationException();
}
_horzRenderer = new WpfHorzTextRenderer(_textElement, this);
_vertRenderer = new WpfVertTextRenderer(_textElement, this);
_pathRenderer = new WpfPathTextRenderer(_textElement, this);
}
public WpfTextContext(SvgTextElement textElement, WpfTextRendering textRendering)
{
if (textElement == null)
{
throw new ArgumentNullException(nameof(textElement),
"The SVG text element is required, and cannot be null (or Nothing).");
}
if (textRendering == null)
{
throw new ArgumentNullException(nameof(textRendering),
"The text rendering object is required, and cannot be null (or Nothing).");
}
_textElement = textElement;
_textRendering = textRendering;
}
protected WpfTextRenderer(SvgTextElement textElement, WpfTextRendering textRendering)
{
if (textElement == null)
{
throw new ArgumentNullException("textElement",
"The SVG text element is required, and cannot be null (or Nothing).");
}
if (textRendering == null)
{
throw new ArgumentNullException("textRendering",
"The text rendering object is required, and cannot be null (or Nothing).");
}
_textElement = textElement;
_textRendering = textRendering;
}
private void AddTSpanElementPath(SvgTSpanElement element, ref PointF ctp)
{
ctp = GetCurrentTextPosition(element, ctp);
string sBaselineShift = element.GetPropertyValue("baseline-shift").Trim();
double shiftBy = 0;
if (sBaselineShift.Length > 0)
{
SvgTextElement textElement = (SvgTextElement)element.SelectSingleNode("ancestor::svg:text",
element.OwnerDocument.NamespaceManager);
float textFontSize = GetComputedFontSize(textElement);
if (sBaselineShift.EndsWith("%"))
{
shiftBy = SvgNumber.ParseNumber(sBaselineShift.Substring(0,
sBaselineShift.Length - 1)) / 100 * textFontSize;
}
else if (sBaselineShift == "sub")
{
shiftBy = -0.6F * textFontSize;
}
else if (sBaselineShift == "super")
{
shiftBy = 0.6F * textFontSize;
}
else if (sBaselineShift == "baseline")
{
shiftBy = 0;
}
else
{
shiftBy = SvgNumber.ParseNumber(sBaselineShift);
}
}
foreach (XmlNode child in element.ChildNodes)
{
if (child.NodeType == XmlNodeType.Text)
{
ctp.Y -= (float)shiftBy;
AddGraphicsPath(element, ref ctp, GetText(element, child));
ctp.Y += (float)shiftBy;
}
}
}
public virtual void VisitTextElement(SvgTextElement element) => DefaultVisit(element);
public WpfPathTextRenderer(SvgTextElement textElement, WpfTextRendering textRendering)
: base(textElement, textRendering)
{
}
public override void RenderTextRun(SvgTextContentElement element, ref Point ctp,
string text, double rotate, WpfTextPlacement placement)
{
if (string.IsNullOrWhiteSpace(text))
{
return;
}
double emSize = GetComputedFontSize(element);
var fontFamilyInfo = GetTextFontFamilyInfo(element);
FontFamily fontFamily = fontFamilyInfo.Family;
FontStyle fontStyle = fontFamilyInfo.Style;
FontWeight fontWeight = fontFamilyInfo.Weight;
FontStretch fontStretch = fontFamilyInfo.Stretch;
WpfTextStringFormat stringFormat = GetTextStringFormat(element);
// Fix the use of Postscript fonts...
WpfFontFamilyVisitor fontFamilyVisitor = _context.FontFamilyVisitor;
if (!string.IsNullOrWhiteSpace(_actualFontName) && fontFamilyVisitor != null)
{
//WpfFontFamilyInfo currentFamily = new WpfFontFamilyInfo(fontFamily, fontWeight,
// fontStyle, fontStretch);
WpfFontFamilyInfo familyInfo = fontFamilyVisitor.Visit(_actualFontName,
fontFamilyInfo, _context);
if (familyInfo != null && !familyInfo.IsEmpty)
{
fontFamily = familyInfo.Family;
fontWeight = familyInfo.Weight;
fontStyle = familyInfo.Style;
fontStretch = familyInfo.Stretch;
}
}
WpfSvgPaint fillPaint = new WpfSvgPaint(_context, element, "fill");
Brush textBrush = fillPaint.GetBrush();
WpfSvgPaint strokePaint = new WpfSvgPaint(_context, element, "stroke");
Pen textPen = strokePaint.GetPen();
if (textBrush == null && textPen == null)
{
return;
}
else if (textBrush == null)
{
// If here, then the pen is not null, and so the fill cannot be null.
// We set this to transparent for stroke only text path...
textBrush = Brushes.Transparent;
}
TextDecorationCollection textDecors = GetTextDecoration(element);
if (textDecors == null)
{
SvgTextElement textElement = element.ParentNode as SvgTextElement;
if (textElement != null)
{
textDecors = GetTextDecoration(textElement);
}
}
TextAlignment alignment = stringFormat.Alignment;
bool hasWordSpacing = false;
string wordSpaceText = element.GetAttribute("word-spacing");
double wordSpacing = 0;
if (!string.IsNullOrWhiteSpace(wordSpaceText) &&
double.TryParse(wordSpaceText, out wordSpacing) && !wordSpacing.Equals(0))
{
hasWordSpacing = true;
}
bool hasLetterSpacing = false;
string letterSpaceText = element.GetAttribute("letter-spacing");
double letterSpacing = 0;
if (!string.IsNullOrWhiteSpace(letterSpaceText) &&
double.TryParse(letterSpaceText, out letterSpacing) && !letterSpacing.Equals(0))
{
hasLetterSpacing = true;
}
bool isRotatePosOnly = false;
IList <WpfTextPosition> textPositions = null;
int textPosCount = 0;
if ((placement != null && placement.HasPositions))
{
textPositions = placement.Positions;
textPosCount = textPositions.Count;
isRotatePosOnly = placement.IsRotateOnly;
}
var typeFace = new Typeface(fontFamily, fontStyle, fontWeight, fontStretch);
if (textPositions != null && textPositions.Count != 0)
{
if (textPositions.Count == text.Trim().Length) //TODO: Best way to handle this...
{
text = text.Trim();
}
}
if (hasLetterSpacing || hasWordSpacing || textPositions != null)
{
double spacing = Convert.ToDouble(letterSpacing);
int startSpaces = 0;
for (int i = 0; i < text.Length; i++)
{
if (char.IsWhiteSpace(text[i]))
{
startSpaces++;
}
else
{
break;
}
}
int j = 0;
string inputText = string.Empty;
for (int i = 0; i < text.Length; i++)
{
// Avoid rendering only spaces at the start of text run...
if (i == 0 && startSpaces != 0)
{
inputText = text.Substring(0, startSpaces + 1);
i += startSpaces;
}
else
{
inputText = new string(text[i], 1);
}
FormattedText formattedText = new FormattedText(inputText, _context.CultureInfo,
stringFormat.Direction, typeFace, emSize, textBrush);
if (this.IsMeasuring)
{
this.AddTextWidth(formattedText.WidthIncludingTrailingWhitespace);
continue;
}
formattedText.Trimming = stringFormat.Trimming;
formattedText.TextAlignment = stringFormat.Alignment;
if (textDecors != null && textDecors.Count != 0)
{
formattedText.SetTextDecorations(textDecors);
}
WpfTextPosition?textPosition = null;
if (textPositions != null && j < textPosCount)
{
textPosition = textPositions[j];
}
//float xCorrection = 0;
//if (alignment == TextAlignment.Left)
// xCorrection = emSize * 1f / 6f;
//else if (alignment == TextAlignment.Right)
// xCorrection = -emSize * 1f / 6f;
double yCorrection = formattedText.Baseline;
float rotateAngle = (float)rotate;
if (textPosition != null)
{
if (!isRotatePosOnly)
{
Point pt = textPosition.Value.Location;
ctp.X = pt.X;
ctp.Y = pt.Y;
}
rotateAngle = (float)textPosition.Value.Rotation;
}
Point textStart = ctp;
RotateTransform rotateAt = null;
if (!rotateAngle.Equals(0))
{
rotateAt = new RotateTransform(rotateAngle, textStart.X, textStart.Y);
_textContext.PushTransform(rotateAt);
}
Point textPoint = new Point(ctp.X, ctp.Y - yCorrection);
if (textPen != null || _context.TextAsGeometry)
{
Geometry textGeometry = formattedText.BuildGeometry(textPoint);
if (textGeometry != null && !textGeometry.IsEmpty())
{
_textContext.DrawGeometry(textBrush, textPen,
ExtractTextPathGeometry(textGeometry));
this.IsTextPath = true;
}
else
{
_textContext.DrawText(formattedText, textPoint);
}
}
else
{
_textContext.DrawText(formattedText, textPoint);
}
//float bboxWidth = (float)formattedText.Width;
double bboxWidth = formattedText.WidthIncludingTrailingWhitespace;
if (alignment == TextAlignment.Center)
{
bboxWidth /= 2f;
}
else if (alignment == TextAlignment.Right)
{
bboxWidth = 0;
}
//ctp.X += bboxWidth + emSize / 4 + spacing;
if (hasLetterSpacing)
{
ctp.X += bboxWidth + letterSpacing;
}
if (hasWordSpacing && char.IsWhiteSpace(text[i]))
{
if (hasLetterSpacing)
{
ctp.X += wordSpacing;
}
else
{
ctp.X += bboxWidth + wordSpacing;
}
}
else
{
if (!hasLetterSpacing)
{
ctp.X += bboxWidth;
}
}
if (rotateAt != null)
{
_textContext.Pop();
}
j++;
}
}
else
{
FormattedText formattedText = new FormattedText(text, _context.CultureInfo,
stringFormat.Direction, typeFace, emSize, textBrush);
if (this.IsMeasuring)
{
this.AddTextWidth(formattedText.WidthIncludingTrailingWhitespace);
return;
}
if (alignment == TextAlignment.Center && this.TextWidth > 0)
{
alignment = TextAlignment.Left;
}
formattedText.TextAlignment = alignment;
formattedText.Trimming = stringFormat.Trimming;
if (textDecors != null && textDecors.Count != 0)
{
formattedText.SetTextDecorations(textDecors);
}
//float xCorrection = 0;
//if (alignment == TextAlignment.Left)
// xCorrection = emSize * 1f / 6f;
//else if (alignment == TextAlignment.Right)
// xCorrection = -emSize * 1f / 6f;
double yCorrection = formattedText.Baseline;
float rotateAngle = (float)rotate;
Point textPoint = new Point(ctp.X, ctp.Y - yCorrection);
RotateTransform rotateAt = null;
if (!rotateAngle.Equals(0))
{
rotateAt = new RotateTransform(rotateAngle, ctp.X, ctp.Y);
_textContext.PushTransform(rotateAt);
}
if (textPen != null || _context.TextAsGeometry)
{
Geometry textGeometry = formattedText.BuildGeometry(textPoint);
if (textGeometry != null && !textGeometry.IsEmpty())
{
_textContext.DrawGeometry(textBrush, textPen,
ExtractTextPathGeometry(textGeometry));
this.IsTextPath = true;
}
else
{
_textContext.DrawText(formattedText, textPoint);
}
}
else
{
_textContext.DrawText(formattedText, textPoint);
}
//float bboxWidth = (float)formattedText.Width;
double bboxWidth = formattedText.WidthIncludingTrailingWhitespace;
if (alignment == TextAlignment.Center)
{
bboxWidth /= 2f;
}
else if (alignment == TextAlignment.Right)
{
bboxWidth = 0;
}
//ctp.X += bboxWidth + emSize / 4;
ctp.X += bboxWidth;
if (rotateAt != null)
{
_textContext.Pop();
}
}
}
protected WpfTextStringFormat GetTextStringFormat(SvgTextContentElement element)
{
WpfTextStringFormat sf = WpfTextStringFormat.Default;
bool doAlign = true;
if (element is SvgTSpanElement || element is SvgTRefElement)
{
SvgTextPositioningElement posElement = (SvgTextPositioningElement)element;
if (posElement.X.AnimVal.NumberOfItems == 0)
{
doAlign = false;
}
}
var comparer = StringComparison.OrdinalIgnoreCase;
string dir = element.GetPropertyValue("direction");
bool isRightToLeft = string.Equals(dir, "rtl", comparer);
sf.Direction = isRightToLeft ? FlowDirection.RightToLeft : FlowDirection.LeftToRight;
if (doAlign)
{
string anchor = element.GetPropertyValue("text-anchor");
if (isRightToLeft)
{
if (string.Equals(anchor, "middle", comparer))
{
sf.Anchor = WpfTextAnchor.Middle;
}
else if (string.Equals(anchor, "end", comparer))
{
sf.Anchor = WpfTextAnchor.Start;
}
else
{
sf.Anchor = WpfTextAnchor.End;
}
}
else
{
if (string.Equals(anchor, "middle", comparer))
{
sf.Anchor = WpfTextAnchor.Middle;
}
else if (string.Equals(anchor, "end", comparer))
{
sf.Anchor = WpfTextAnchor.End;
}
}
}
else
{
SvgTextElement textElement = element.ParentNode as SvgTextElement;
if (textElement != null)
{
string anchor = textElement.GetPropertyValue("text-anchor");
if (isRightToLeft)
{
if (string.Equals(anchor, "middle", comparer))
{
sf.Anchor = WpfTextAnchor.Middle;
}
else if (string.Equals(anchor, "end", comparer))
{
sf.Anchor = WpfTextAnchor.Start;
}
else
{
sf.Anchor = WpfTextAnchor.End;
}
}
else
{
if (string.Equals(anchor, "middle", comparer))
{
sf.Anchor = WpfTextAnchor.Middle;
}
else if (string.Equals(anchor, "end", comparer))
{
sf.Anchor = WpfTextAnchor.End;
}
}
}
}
//if (isRightToLeft)
//{
// if (sf.Alignment == TextAlignment.Right)
// sf.Alignment = TextAlignment.Left;
// else if (sf.Alignment == TextAlignment.Left)
// sf.Alignment = TextAlignment.Right;
// //sf.FormatFlags = StringFormatFlags.DirectionRightToLeft;
//}
//dir = element.GetPropertyValue("writing-mode");
//if (dir == "tb")
//{
// sf.FormatFlags = sf.FormatFlags | StringFormatFlags.DirectionVertical;
//}
//sf.FormatFlags = sf.FormatFlags | StringFormatFlags.MeasureTrailingSpaces;
return(sf);
}
public override void Render(GdiGraphicsRenderer renderer)
{
_graphics = renderer.GraphicsWrapper;
SvgRenderingHint hint = element.RenderingHint;
if (hint == SvgRenderingHint.Clipping)
{
return;
}
if (element.ParentNode is SvgClipPathElement)
{
return;
}
SvgTextElement textElement = element as SvgTextElement;
if (textElement == null)
{
return;
}
string sVisibility = textElement.GetPropertyValue("visibility");
string sDisplay = textElement.GetPropertyValue("display");
if (String.Equals(sVisibility, "hidden") || String.Equals(sDisplay, "none"))
{
return;
}
Clip(_graphics);
PointF ctp = new PointF(0, 0); // current text position
ctp = GetCurrentTextPosition(textElement, ctp);
string sBaselineShift = textElement.GetPropertyValue("baseline-shift").Trim();
double shiftBy = 0;
if (sBaselineShift.Length > 0)
{
float textFontSize = GetComputedFontSize(textElement);
if (sBaselineShift.EndsWith("%"))
{
shiftBy = SvgNumber.ParseNumber(sBaselineShift.Substring(0,
sBaselineShift.Length - 1)) / 100 * textFontSize;
}
else if (sBaselineShift == "sub")
{
shiftBy = -0.6F * textFontSize;
}
else if (sBaselineShift == "super")
{
shiftBy = 0.6F * textFontSize;
}
else if (sBaselineShift == "baseline")
{
shiftBy = 0;
}
else
{
shiftBy = SvgNumber.ParseNumber(sBaselineShift);
}
}
XmlNodeType nodeType = XmlNodeType.None;
foreach (XmlNode child in element.ChildNodes)
{
nodeType = child.NodeType;
if (nodeType == XmlNodeType.Text)
{
ctp.Y -= (float)shiftBy;
AddGraphicsPath(textElement, ref ctp, GetText(textElement, child));
ctp.Y += (float)shiftBy;
}
else if (nodeType == XmlNodeType.Element)
{
string nodeName = child.Name;
if (String.Equals(nodeName, "tref"))
{
AddTRefElementPath((SvgTRefElement)child, ref ctp);
}
else if (String.Equals(nodeName, "tspan"))
{
AddTSpanElementPath((SvgTSpanElement)child, ref ctp);
}
}
}
PaintMarkers(renderer, textElement, _graphics);
_graphics = null;
}
private void RenderTextRun(WpfTextTuple textInfo, ref Point ctp,
string text, double rotate, WpfTextPlacement placement)
{
if (string.IsNullOrWhiteSpace(text))
{
return;
}
WpfFontFamilyInfo familyInfo = textInfo.Item1;
double emSize = textInfo.Item2;
WpfTextStringFormat stringFormat = textInfo.Item3;
SvgTextContentElement element = textInfo.Item4;
FontFamily fontFamily = familyInfo.Family;
FontWeight fontWeight = familyInfo.Weight;
FontStyle fontStyle = familyInfo.Style;
FontStretch fontStretch = familyInfo.Stretch;
WpfSvgPaint fillPaint = new WpfSvgPaint(_context, element, "fill");
Brush textBrush = fillPaint.GetBrush();
WpfSvgPaint strokePaint = new WpfSvgPaint(_context, element, "stroke");
Pen textPen = strokePaint.GetPen();
if (textBrush == null && textPen == null)
{
return;
}
if (textBrush == null)
{
// If here, then the pen is not null, and so the fill cannot be null.
// We set this to transparent for stroke only text path...
textBrush = Brushes.Transparent;
}
if (textPen != null)
{
textPen.LineJoin = PenLineJoin.Miter; // Better for text rendering
textPen.MiterLimit = 1;
}
TextDecorationCollection textDecors = GetTextDecoration(element);
if (textDecors == null)
{
SvgTextElement textElement = element.ParentNode as SvgTextElement;
if (textElement != null)
{
textDecors = GetTextDecoration(textElement);
}
}
TextAlignment alignment = stringFormat.Alignment;
bool hasWordSpacing = false;
string wordSpaceText = element.GetAttribute("word-spacing");
double wordSpacing = 0;
if (!string.IsNullOrWhiteSpace(wordSpaceText) &&
double.TryParse(wordSpaceText, out wordSpacing) && !wordSpacing.Equals(0))
{
hasWordSpacing = true;
}
bool hasLetterSpacing = false;
string letterSpaceText = element.GetAttribute("letter-spacing");
double letterSpacing = 0;
if (!string.IsNullOrWhiteSpace(letterSpaceText) &&
double.TryParse(letterSpaceText, out letterSpacing) && !letterSpacing.Equals(0))
{
hasLetterSpacing = true;
}
bool isRotatePosOnly = false;
IList <WpfTextPosition> textPositions = null;
int textPosCount = 0;
if ((placement != null && placement.HasPositions))
{
textPositions = placement.Positions;
textPosCount = textPositions.Count;
isRotatePosOnly = placement.IsRotateOnly;
}
WpfTextBuilder textBuilder = WpfTextBuilder.Create(familyInfo, this.TextCulture, emSize);
this.IsTextPath = true;
if (textPositions != null && textPositions.Count != 0)
{
if (textPositions.Count == text.Trim().Length) //TODO: Best way to handle this...
{
text = text.Trim();
}
}
if (hasLetterSpacing || hasWordSpacing || textPositions != null)
{
double spacing = Convert.ToDouble(letterSpacing);
int startSpaces = 0;
for (int i = 0; i < text.Length; i++)
{
if (char.IsWhiteSpace(text[i]))
{
startSpaces++;
}
else
{
break;
}
}
int j = 0;
string inputText = string.Empty;
for (int i = 0; i < text.Length; i++)
{
// Avoid rendering only spaces at the start of text run...
if (i == 0 && startSpaces != 0)
{
inputText = text.Substring(0, startSpaces + 1);
i += startSpaces;
}
else
{
inputText = new string(text[i], 1);
}
if (this.IsMeasuring)
{
var textSize = textBuilder.MeasureText(element, inputText);
this.AddTextWidth(ctp, textSize.Width);
continue;
}
textBuilder.Trimming = stringFormat.Trimming;
textBuilder.TextAlignment = stringFormat.Alignment;
if (textDecors != null && textDecors.Count != 0)
{
textBuilder.SetTextDecorations(textDecors);
}
WpfTextPosition?textPosition = null;
if (textPositions != null && j < textPosCount)
{
textPosition = textPositions[j];
}
//float xCorrection = 0;
//if (alignment == TextAlignment.Left)
// xCorrection = emSize * 1f / 6f;
//else if (alignment == TextAlignment.Right)
// xCorrection = -emSize * 1f / 6f;
double yCorrection = textBuilder.Baseline;
float rotateAngle = (float)rotate;
if (textPosition != null)
{
if (!isRotatePosOnly)
{
Point pt = textPosition.Value.Location;
ctp.X = pt.X;
ctp.Y = pt.Y;
}
rotateAngle = (float)textPosition.Value.Rotation;
}
Point textStart = ctp;
RotateTransform rotateAt = null;
if (!rotateAngle.Equals(0))
{
rotateAt = new RotateTransform(rotateAngle, textStart.X, textStart.Y);
_drawContext.PushTransform(rotateAt);
}
Point textPoint = new Point(ctp.X, ctp.Y - yCorrection);
Geometry textGeometry = textBuilder.Build(element, inputText, textPoint.X, textPoint.Y);
if (textGeometry != null && !textGeometry.IsEmpty())
{
_drawContext.DrawGeometry(textBrush, textPen,
ExtractTextPathGeometry(textGeometry));
this.IsTextPath = true;
}
//float bboxWidth = (float)formattedText.Width;
double bboxWidth = textGeometry.Bounds.Width;
if (alignment == TextAlignment.Center)
{
bboxWidth /= 2f;
}
else if (alignment == TextAlignment.Right)
{
bboxWidth = 0;
}
//ctp.X += bboxWidth + emSize / 4 + spacing;
if (hasLetterSpacing)
{
ctp.X += bboxWidth + letterSpacing;
}
if (hasWordSpacing && char.IsWhiteSpace(text[i]))
{
if (hasLetterSpacing)
{
ctp.X += wordSpacing;
}
else
{
ctp.X += bboxWidth + wordSpacing;
}
}
else
{
if (!hasLetterSpacing)
{
ctp.X += bboxWidth;
}
}
if (rotateAt != null)
{
_drawContext.Pop();
}
j++;
}
}
else
{
if (this.IsMeasuring)
{
var textSize = textBuilder.MeasureText(element, text);
this.AddTextWidth(ctp, textSize.Width);
return;
}
var textContext = this.TextContext;
if (textContext != null && textContext.IsPositionChanged(element) == false)
{
if (alignment == TextAlignment.Center && this.TextWidth > 0)
{
alignment = TextAlignment.Left;
}
}
textBuilder.TextAlignment = alignment;
textBuilder.Trimming = stringFormat.Trimming;
if (textDecors != null && textDecors.Count != 0)
{
textBuilder.SetTextDecorations(textDecors);
}
//float xCorrection = 0;
//if (alignment == TextAlignment.Left)
// xCorrection = emSize * 1f / 6f;
//else if (alignment == TextAlignment.Right)
// xCorrection = -emSize * 1f / 6f;
double yCorrection = textBuilder.Baseline;
float rotateAngle = (float)rotate;
Point textPoint = new Point(ctp.X, ctp.Y - yCorrection);
RotateTransform rotateAt = null;
if (!rotateAngle.Equals(0))
{
rotateAt = new RotateTransform(rotateAngle, ctp.X, ctp.Y);
_drawContext.PushTransform(rotateAt);
}
Geometry textGeometry = textBuilder.Build(element, text, textPoint.X, textPoint.Y);
if (textGeometry != null && !textGeometry.IsEmpty())
{
_drawContext.DrawGeometry(textBrush, textPen,
ExtractTextPathGeometry(textGeometry));
}
//float bboxWidth = (float)formattedText.Width;
// double bboxWidth = textGeometry.Bounds.Width;
double bboxWidth = textBuilder.Width;
if (alignment == TextAlignment.Center)
{
bboxWidth /= 2f;
}
else if (alignment == TextAlignment.Right)
{
bboxWidth = 0;
}
//ctp.X += bboxWidth + emSize / 4;
ctp.X += bboxWidth;
if (rotateAt != null)
{
_drawContext.Pop();
}
}
}
public override void Render(GdiGraphicsRenderer renderer)
{
_graphics = renderer.GdiGraphics;
//SvgRenderingHint hint = _svgElement.RenderingHint;
//if (hint == SvgRenderingHint.Clipping)
//{
// return;
//}
//if (_svgElement.ParentNode is SvgClipPathElement)
//{
// return;
//}
SvgTextElement textElement = _svgElement as SvgTextElement;
if (textElement == null)
{
return;
}
string sVisibility = textElement.GetPropertyValue("visibility");
string sDisplay = textElement.GetPropertyValue("display");
if (string.Equals(sVisibility, "hidden") || string.Equals(sDisplay, "none"))
{
return;
}
if (_textMode != GdiTextMode.Outlining)
{
SetClip(_graphics);
}
PointF ctp = new PointF(0, 0); // current text position
ctp = GetCurrentTextPosition(textElement, ctp);
string sBaselineShift = textElement.GetPropertyValue("baseline-shift").Trim();
double shiftBy = 0;
if (sBaselineShift.Length > 0)
{
float textFontSize = GetComputedFontSize(textElement);
if (sBaselineShift.EndsWith("%", StringComparison.OrdinalIgnoreCase))
{
shiftBy = SvgNumber.ParseNumber(sBaselineShift.Substring(0,
sBaselineShift.Length - 1)) / 100 * textFontSize;
}
else if (sBaselineShift == "sub")
{
shiftBy = -0.6F * textFontSize;
}
else if (sBaselineShift == "super")
{
shiftBy = 0.6F * textFontSize;
}
else if (sBaselineShift == "baseline")
{
shiftBy = 0;
}
else
{
shiftBy = SvgNumber.ParseNumber(sBaselineShift);
}
}
// For for fonts loading in the background...
var svgDoc = _svgElement.OwnerDocument;
if (svgDoc.IsFontsLoaded == false)
{
//TODO: Use of SpinUntil is known to CPU heavy, but will work for now...
SpinWait.SpinUntil(() => svgDoc.IsFontsLoaded == true);
}
XmlNodeType nodeType = XmlNodeType.None;
foreach (XmlNode child in _svgElement.ChildNodes)
{
SvgStyleableElement stylable = child as SvgStyleableElement;
if (stylable != null)
{
sVisibility = stylable.GetPropertyValue("visibility");
sDisplay = stylable.GetPropertyValue("display");
if (string.Equals(sVisibility, "hidden") || string.Equals(sDisplay, "none"))
{
continue;
}
}
nodeType = child.NodeType;
if (nodeType == XmlNodeType.Text)
{
ctp.Y -= (float)shiftBy;
AddGraphicsPath(textElement, ref ctp, GetText(textElement, child));
ctp.Y += (float)shiftBy;
}
else if (nodeType == XmlNodeType.Element)
{
string nodeName = child.Name;
if (string.Equals(nodeName, "tref"))
{
AddTRefElementPath((SvgTRefElement)child, ref ctp);
}
else if (string.Equals(nodeName, "tspan"))
{
AddTSpanElementPath((SvgTSpanElement)child, ref ctp);
}
}
}
PaintMarkers(renderer, textElement, _graphics);
_graphics = null;
}
