/// <summary>
/// Create a
/// <see cref="FontFace"/>
/// instance from a list of
/// CSS font attributes ("font-family" or "src").
/// </summary>
/// <param name="properties">the font properties</param>
/// <returns>
/// the
/// <see cref="FontFace"/>
/// instance
/// </returns>
public static iText.Svg.Processors.Impl.Font.FontFace Create(IList<CssDeclaration> properties) {
String fontFamily = null;
String srcs = null;
foreach (CssDeclaration descriptor in properties) {
if ("font-family".Equals(descriptor.GetProperty())) {
fontFamily = FontFamilySplitter.RemoveQuotes(descriptor.GetExpression());
}
else {
if ("src".Equals(descriptor.GetProperty())) {
srcs = descriptor.GetExpression();
}
}
}
if (fontFamily == null || srcs == null) {
// 'font-family' and 'src' is required according to spec:
// https://www.w3.org/TR/2013/CR-css-fonts-3-20131003/#descdef-font-family\
// https://www.w3.org/TR/2013/CR-css-fonts-3-20131003/#descdef-src
return null;
}
IList<FontFace.FontFaceSrc> sources = new List<FontFace.FontFaceSrc>();
// ttc collection are supported via url(Arial.ttc#1), url(Arial.ttc#2), etc.
foreach (String src in SplitSourcesSequence(srcs)) {
//local|url("ideal-sans-serif.woff")( format("woff"))?
FontFace.FontFaceSrc source = FontFace.FontFaceSrc.Create(src.Trim());
if (source != null) {
sources.Add(source);
}
}
if (sources.Count > 0) {
return new iText.Svg.Processors.Impl.Font.FontFace(fontFamily, sources);
}
else {
return null;
}
}
/// <summary>Creates a font and adds it to the context.</summary>
/// <param name="fontFamily">the font family</param>
/// <param name="src">the source of the font</param>
/// <returns>true, if successful</returns>
private bool CreateFont(String fontFamily, FontFace.FontFaceSrc src)
{
if (!SupportedFontFormat(src.format))
{
return(false);
}
else
{
if (src.isLocal)
{
// to method with lazy initialization
ICollection <FontInfo> fonts = context.GetFontProvider().GetFontSet().Get(src.src);
if (fonts.Count > 0)
{
foreach (FontInfo fi in fonts)
{
context.AddTemporaryFont(fi, fontFamily);
}
//
return(true);
}
else
{
return(false);
}
}
else
{
try {
// Cache at resource resolver level only, at font level we will create font in any case.
// The instance of fontProgram will be collected by GC if the is no need in it.
byte[] bytes = context.GetResourceResolver().RetrieveBytesFromResource(src.src);
if (bytes != null)
{
FontProgram fp = FontProgramFactory.CreateFont(bytes, false);
context.AddTemporaryFont(fp, PdfEncodings.IDENTITY_H, fontFamily);
return(true);
}
}
catch (Exception) {
}
return(false);
}
}
}
public virtual void SrcPropertyTest()
{
String fontSrc = "web-fonts/droid-serif-invalid.";
CssStyleSheet styleSheet = CssStyleSheetParser.Parse(new FileStream(sourceFolder + "srcs.css", FileMode.Open
, FileAccess.Read));
CssFontFaceRule fontFaceRule = (CssFontFaceRule)styleSheet.GetStatements()[0];
CssDeclaration src = fontFaceRule.GetProperties()[0];
NUnit.Framework.Assert.AreEqual("src", src.GetProperty(), "src expected");
String[] sources = iText.IO.Util.StringUtil.Split(src.GetExpression(), ",");
NUnit.Framework.Assert.AreEqual(27, sources.Length, "27 sources expected");
for (int i = 0; i < sources.Length; i++)
{
Match m = iText.IO.Util.StringUtil.Match(FontFace.FontFaceSrc.UrlPattern, sources[i]);
NUnit.Framework.Assert.IsTrue(m.Success, "Expression doesn't match pattern: " + sources[i]);
String format = iText.IO.Util.StringUtil.Group(m, FontFace.FontFaceSrc.FormatGroup);
String source2 = MessageFormatUtil.Format("{0}({1}){2}", iText.IO.Util.StringUtil.Group(m, FontFace.FontFaceSrc
.TypeGroup), iText.IO.Util.StringUtil.Group(m, FontFace.FontFaceSrc.UrlGroup), format != null ? MessageFormatUtil
.Format(" format({0})", format) : "");
String url = FontFace.FontFaceSrc.Unquote(iText.IO.Util.StringUtil.Group(m, FontFace.FontFaceSrc.UrlGroup)
);
NUnit.Framework.Assert.IsTrue(url.StartsWith(fontSrc), "Invalid url: " + url);
NUnit.Framework.Assert.IsTrue(format == null || FontFace.FontFaceSrc.ParseFormat(format) != FontFace.FontFormat
.None, "Invalid format: " + format);
NUnit.Framework.Assert.AreEqual(sources[i], source2, "Group check fails: ");
FontFace.FontFaceSrc fontFaceSrc = FontFace.FontFaceSrc.Create(sources[i]);
NUnit.Framework.Assert.IsTrue(fontFaceSrc.src.StartsWith(fontSrc), "Invalid url: " + fontSrc);
String type = "url";
if (fontFaceSrc.isLocal)
{
type = "local";
}
NUnit.Framework.Assert.IsTrue(sources[i].StartsWith(type), "Type '" + type + "' expected: " + sources[i]);
switch (fontFaceSrc.format)
{
case FontFace.FontFormat.OpenType: {
NUnit.Framework.Assert.IsTrue(sources[i].Contains("opentype"), "Format " + fontFaceSrc.format + " expected: "
+ sources[i]);
break;
}
case FontFace.FontFormat.TrueType: {
NUnit.Framework.Assert.IsTrue(sources[i].Contains("truetype"), "Format " + fontFaceSrc.format + " expected: "
+ sources[i]);
break;
}
case FontFace.FontFormat.SVG: {
NUnit.Framework.Assert.IsTrue(sources[i].Contains("svg"), "Format " + fontFaceSrc.format + " expected: " +
sources[i]);
break;
}
case FontFace.FontFormat.None: {
NUnit.Framework.Assert.IsFalse(sources[i].Contains("format("), "Format " + fontFaceSrc.format + " expected: "
+ sources[i]);
break;
}
}
}
}
){kind=link}
