protected WpfFontFamilyInfo GetTextFontFamilyInfo(SvgTextContentElement element)
{
_actualFontName = null;
string fontFamily = element.GetPropertyValue("font-family");
string[] fontNames = fontFamily.Split(new char[1] {
','
});
FontStyle fontStyle = GetTextFontStyle(element);
FontWeight fontWeight = GetTextFontWeight(element);
FontStretch fontStretch = GetTextFontStretch(element);
var comparer = StringComparison.OrdinalIgnoreCase;
var docElement = element.OwnerDocument;
ISet <string> svgFontFamilies = docElement.SvgFontFamilies;
IDictionary <string, string> styledFontIds = docElement.StyledFontIds;
IList <string> svgFontNames = null;
if (svgFontFamilies != null && svgFontFamilies.Count != 0)
{
svgFontNames = new List <string>();
}
//var systemFontFamilies = Fonts.SystemFontFamilies;
var wpfSettings = _context.Settings;
var fontFamilyNames = wpfSettings.FontFamilyNames;
var privateFontFamilies = wpfSettings.HasFontFamilies;
FontFamily family = null;
// using separate pointer to give less priority to generic font names
FontFamily genericFamily = null;
WpfFontFamilyType familyType = WpfFontFamilyType.None;
foreach (string fn in fontNames)
{
try
{
string fontName = fn.Trim(new char[] { ' ', '\'', '"' });
if (svgFontFamilies != null && svgFontFamilies.Count != 0)
{
if (svgFontFamilies.Contains(fontName))
{
svgFontNames.Add(fontName);
continue;
}
if (styledFontIds.ContainsKey(fontName))
{
string mappedFontName = styledFontIds[fontName];
if (svgFontFamilies.Contains(mappedFontName))
{
svgFontNames.Add(mappedFontName);
continue;
}
}
}
if (string.Equals(fontName, "serif", comparer))
{
genericFamily = WpfDrawingSettings.GenericSerif;
}
else if (string.Equals(fontName, "sans-serif", comparer) ||
string.Equals(fontName, "sans serif", comparer))
{
genericFamily = WpfDrawingSettings.GenericSansSerif;
}
else if (string.Equals(fontName, "monospace", comparer))
{
genericFamily = WpfDrawingSettings.GenericMonospace;
}
else if (styledFontIds.ContainsKey(fontName))
{
string mappedFontName = styledFontIds[fontName];
family = LookupFontFamily(mappedFontName, fontFamilyNames);
if (family != null)
{
_actualFontName = mappedFontName;
familyType = WpfFontFamilyType.System;
}
}
else
{
// Try looking up fonts in the system font registry...
family = LookupFontFamily(fontName, fontFamilyNames);
if (family != null)
{
_actualFontName = fontName;
familyType = WpfFontFamilyType.System;
}
// If not found, look through private fonts if available..
if (family == null && privateFontFamilies)
{
family = wpfSettings.LookupFontFamily(fontName);
if (family != null)
{
_actualFontName = fontName;
familyType = WpfFontFamilyType.Private;
}
}
}
if (family != null)
{
return(new WpfFontFamilyInfo(familyType, _actualFontName, family,
fontWeight, fontStyle, fontStretch));
}
}
catch (Exception ex)
{
Trace.TraceError(ex.ToString());
}
}
// If set, use the SVG-Font...
if (svgFontNames != null && svgFontNames.Count != 0)
{
FontFamily altFamily = (genericFamily != null) ? genericFamily : WpfDrawingSettings.DefaultFontFamily;
IList <SvgFontElement> svgFonts = docElement.GetFonts(svgFontNames);
if (svgFonts != null && svgFonts.Count != 0)
{
string fontVariant = element.GetPropertyValue("font-variant");
// For a single match...
if (svgFonts.Count == 1)
{
var fontFamilyInfo = new WpfFontFamilyInfo(svgFonts[0].FontFamily, svgFonts[0],
fontWeight, fontStyle, fontStretch);
fontFamilyInfo.Variant = fontVariant;
// For rendering that do not support the SVG Fonts...
fontFamilyInfo.Family = altFamily;
return(fontFamilyInfo);
}
// For the defined font style...
if (fontStyle != FontStyles.Normal)
{
// Then it is either oblique or italic
SvgFontElement closeFont = null;
SvgFontElement closestFont = null;
bool isItalic = fontStyle.Equals(FontStyles.Italic);
foreach (var svgFont in svgFonts)
{
var fontFace = svgFont.FontFace;
if (fontFace == null)
{
continue;
}
var typefaceStyle = GetTextFontStyle(fontFace.FontStyle);
if (fontStyle.Equals(typefaceStyle))
{
closeFont = svgFont;
if (closestFont == null)
{
closestFont = svgFont;
}
var typefaceWeight = GetTextFontWeight(fontFace.FontWeight);
if (fontVariant.Equals(fontFace.FontVariant, comparer))
{
closestFont = svgFont;
if (fontWeight.Equals(typefaceWeight))
{
var fontFamilyInfo = new WpfFontFamilyInfo(svgFont.FontFamily, svgFont,
fontWeight, fontStyle, fontStretch);
fontFamilyInfo.Variant = fontVariant;
// For rendering that do not support the SVG Fonts...
fontFamilyInfo.Family = altFamily;
return(fontFamilyInfo);
}
}
}
if (closeFont == null)
{
if (isItalic && typefaceStyle == FontStyles.Oblique)
{
closeFont = svgFont;
}
if (!isItalic && typefaceStyle == FontStyles.Italic)
{
closeFont = svgFont;
}
}
}
if (closestFont != null)
{
closeFont = closestFont;
}
if (closeFont != null)
{
var fontFamilyInfo = new WpfFontFamilyInfo(closeFont.FontFamily, closeFont,
fontWeight, fontStyle, fontStretch);
fontFamilyInfo.Variant = fontVariant;
// For rendering that do not support the SVG Fonts...
fontFamilyInfo.Family = altFamily;
return(fontFamilyInfo);
}
}
SvgFontElement variantFont = null;
// For multiple matches, we will test the variants...
if (!string.IsNullOrWhiteSpace(fontVariant))
{
foreach (var svgFont in svgFonts)
{
var fontFace = svgFont.FontFace;
if (fontFace == null)
{
continue;
}
if (fontVariant.Equals(fontFace.FontVariant, comparer))
{
variantFont = svgFont;
// Check for more perfect match...
var typefaceWeight = GetTextFontWeight(fontFace.FontWeight);
var typefaceStyle = GetTextFontStyle(fontFace.FontStyle);
if (fontStyle.Equals(typefaceStyle) && fontWeight.Equals(typefaceWeight))
{
var fontFamilyInfo = new WpfFontFamilyInfo(svgFont.FontFamily, svgFont,
fontWeight, fontStyle, fontStretch);
fontFamilyInfo.Variant = fontVariant;
// For rendering that do not support the SVG Fonts...
fontFamilyInfo.Family = altFamily;
return(fontFamilyInfo);
}
}
}
//if (variantFont != null)
//{
// // If there was a matching variant but either style or weight not matched...
// var fontFamilyInfo = new WpfFontFamilyInfo(variantFont.FontFamily, variantFont,
// fontWeight, fontStyle, fontStretch);
// fontFamilyInfo.Variant = fontVariant;
// // For rendering that do not support the SVG Fonts...
// fontFamilyInfo.Family = altFamily;
// return fontFamilyInfo;
//}
}
// For the defined font weights...
if (fontWeight != FontWeights.Normal && fontWeight != FontWeights.Regular)
{
int weightValue = fontWeight.ToOpenTypeWeight();
int selectedValue = int.MaxValue;
SvgFontElement sameWeightFont = null;
SvgFontElement closestFont = null;
foreach (var svgFont in svgFonts)
{
var fontFace = svgFont.FontFace;
if (fontFace == null)
{
continue;
}
var typefaceWeight = GetTextFontWeight(fontFace.FontWeight);
if (fontWeight.Equals(typefaceWeight))
{
sameWeightFont = svgFont;
var typefaceStyle = GetTextFontStyle(fontFace.FontStyle);
if (fontStyle.Equals(typefaceStyle))
{
var fontFamilyInfo = new WpfFontFamilyInfo(svgFont.FontFamily, svgFont,
fontWeight, fontStyle, fontStretch);
fontFamilyInfo.Variant = fontVariant;
// For rendering that do not support the SVG Fonts...
fontFamilyInfo.Family = altFamily;
return(fontFamilyInfo);
}
}
int weightDiff = Math.Abs(weightValue - typefaceWeight.ToOpenTypeWeight());
if (weightDiff < selectedValue)
{
closestFont = svgFont;
selectedValue = weightDiff;
}
}
// If the weights matched, but not the style
if (sameWeightFont != null)
{
var fontFamilyInfo = new WpfFontFamilyInfo(sameWeightFont.FontFamily, sameWeightFont,
fontWeight, fontStyle, fontStretch);
fontFamilyInfo.Variant = fontVariant;
// For rendering that do not support the SVG Fonts...
fontFamilyInfo.Family = altFamily;
return(fontFamilyInfo);
}
if (closestFont != null)
{
var fontFamilyInfo = new WpfFontFamilyInfo(closestFont.FontFamily, closestFont,
fontWeight, fontStyle, fontStretch);
fontFamilyInfo.Variant = fontVariant;
// For rendering that do not support the SVG Fonts...
fontFamilyInfo.Family = altFamily;
return(fontFamilyInfo);
}
}
if (variantFont != null)
{
// If there was a matching variant but either style or weight not matched...
var fontFamilyInfo = new WpfFontFamilyInfo(variantFont.FontFamily, variantFont,
fontWeight, fontStyle, fontStretch);
fontFamilyInfo.Variant = fontVariant;
// For rendering that do not support the SVG Fonts...
fontFamilyInfo.Family = altFamily;
return(fontFamilyInfo);
}
else // If the variant is not found, return the first match...
{
var fontFamilyInfo = new WpfFontFamilyInfo(svgFonts[0].FontFamily, svgFonts[0],
fontWeight, fontStyle, fontStretch);
fontFamilyInfo.Variant = fontVariant;
// For rendering that do not support the SVG Fonts...
fontFamilyInfo.Family = altFamily;
return(fontFamilyInfo);
}
//// For multiple matches, we will test the variants...
//if (string.IsNullOrWhiteSpace(fontVariant))
//{
// // Not found, return the first match...
// var fontFamilyInfo = new WpfFontFamilyInfo(svgFonts[0].FontFamily, svgFonts[0],
// fontWeight, fontStyle, fontStretch);
// fontFamilyInfo.Variant = fontVariant;
// // For rendering that do not support the SVG Fonts...
// fontFamilyInfo.Family = altFamily;
// return fontFamilyInfo;
//}
}
}
if (genericFamily != null)
{
return(new WpfFontFamilyInfo(WpfFontFamilyType.Generic, _actualFontName, genericFamily,
fontWeight, fontStyle, fontStretch));
}
// No known font-family was found => default to "Arial"
return(new WpfFontFamilyInfo(familyType, _actualFontName,
WpfDrawingSettings.DefaultFontFamily, fontWeight, fontStyle, fontStretch));
}