internal FontSelectorCache(FontSet defaultFontSet)
{
System.Diagnostics.Debug.Assert(defaultFontSet != null);
this.defaultSelectors = new FontSelectorCache.FontSetSelectors();
this.defaultSelectors.Update(defaultFontSet);
this.defaultFontSet = defaultFontSet;
}
/// <summary>Creates a new instance of FontProvider</summary>
/// <param name="fontSet">predefined set of fonts, could be null.</param>
/// <param name="defaultFontFamily">default font family.</param>
public FontProvider(FontSet fontSet, String defaultFontFamily)
{
this.fontSet = fontSet != null ? fontSet : new FontSet();
pdfFonts = new Dictionary <FontInfo, PdfFont>();
fontSelectorCache = new FontSelectorCache(this.fontSet);
this.defaultFontFamily = defaultFontFamily;
}
protected internal FontSelectorStrategy(String text, FontProvider provider, FontSet tempFonts)
{
this.text = text;
this.index = 0;
this.provider = provider;
this.tempFonts = tempFonts;
}
/// <summary>
/// Get from cache or create a new instance of
/// <see cref="iText.Kernel.Font.PdfFont"/>
/// .
/// </summary>
/// <param name="fontInfo">
/// font info, to create
/// <see cref="iText.IO.Font.FontProgram"/>
/// and
/// <see cref="iText.Kernel.Font.PdfFont"/>
/// .
/// </param>
/// <param name="tempFonts">Set of temporary fonts.</param>
/// <returns>
/// cached or new instance of
/// <see cref="iText.Kernel.Font.PdfFont"/>
/// .
/// </returns>
public virtual PdfFont GetPdfFont(FontInfo fontInfo, FontSet tempFonts)
{
if (pdfFonts.ContainsKey(fontInfo))
{
return(pdfFonts.Get(fontInfo));
}
else
{
FontProgram fontProgram = null;
if (tempFonts != null)
{
fontProgram = tempFonts.GetFontProgram(fontInfo);
}
if (fontProgram == null)
{
fontProgram = fontSet.GetFontProgram(fontInfo);
}
PdfFont pdfFont;
try {
if (fontProgram == null)
{
if (fontInfo.GetFontData() != null)
{
fontProgram = FontProgramFactory.CreateFont(fontInfo.GetFontData(), GetDefaultCacheFlag());
}
else
{
fontProgram = FontProgramFactory.CreateFont(fontInfo.GetFontName(), GetDefaultCacheFlag());
}
}
String encoding = fontInfo.GetEncoding();
if (encoding == null || encoding.Length == 0)
{
encoding = GetDefaultEncoding(fontProgram);
}
pdfFont = PdfFontFactory.CreateFont(fontProgram, encoding, GetDefaultEmbeddingFlag());
}
catch (System.IO.IOException e) {
// Converting checked exceptions to unchecked RuntimeException (java-specific comment).
//
// FontProvider is usually used in highlevel API, which requests fonts in deep underlying logic.
// IOException would mean that font is chosen and it is supposed to exist, however it cannot be read.
// Using fallbacks in such situations would make FontProvider less intuitive.
//
// Even though softening of checked exceptions can be handled at higher levels in order to let
// the caller of this method know that font creation failed, we prefer to avoid bloating highlevel API
// and avoid making higher level code depend on low-level code because of the exceptions handling.
throw new PdfException(PdfException.IoExceptionWhileCreatingFont, e);
}
pdfFonts.Put(fontInfo, pdfFont);
return(pdfFont);
}
}
internal virtual bool Update(FontSet fontSet)
{
System.Diagnostics.Debug.Assert(fontSet != null);
if (fontSetSize == fontSet.Size())
{
return(false);
}
else
{
map.Clear();
fontSetSize = fontSet.Size();
return(true);
}
}
private bool Update(FontSelectorCache.FontSetSelectors selectors, FontSet fontSet)
{
bool updated = false;
if (defaultSelectors.Update(defaultFontSet))
{
updated = true;
}
if (selectors != null && selectors.Update(fontSet))
{
updated = true;
}
return(updated);
}
internal virtual void Put(FontSelectorKey key, FontSelector fontSelector, FontSet fontSet)
{
if (fontSet == null)
{
Put(key, fontSelector);
}
else
{
FontSelectorCache.FontSetSelectors selectors = caches.Get(fontSet.GetId());
if (selectors == null)
{
caches.Put(fontSet.GetId(), selectors = new FontSelectorCache.FontSetSelectors());
}
//update selectors and defaultSelectors to reset counter before pushing if needed.
Update(selectors, fontSet);
selectors.map.Put(key, fontSelector);
}
}
/// <summary>
/// Get from cache or create a new instance of
/// <see cref="iText.Kernel.Font.PdfFont"/>
/// .
/// </summary>
/// <param name="fontInfo">
/// font info, to create
/// <see cref="iText.IO.Font.FontProgram"/>
/// and
/// <see cref="iText.Kernel.Font.PdfFont"/>
/// .
/// </param>
/// <param name="tempFonts">Set of temporary fonts.</param>
/// <returns>
/// cached or new instance of
/// <see cref="iText.Kernel.Font.PdfFont"/>
/// .
/// </returns>
public virtual PdfFont GetPdfFont(FontInfo fontInfo, FontSet tempFonts)
{
if (pdfFonts.ContainsKey(fontInfo))
{
return(pdfFonts.Get(fontInfo));
}
else
{
FontProgram fontProgram = null;
if (tempFonts != null)
{
fontProgram = tempFonts.GetFontProgram(fontInfo);
}
if (fontProgram == null)
{
fontProgram = fontSet.GetFontProgram(fontInfo);
}
PdfFont pdfFont;
try {
if (fontProgram == null)
{
if (fontInfo.GetFontData() != null)
{
fontProgram = FontProgramFactory.CreateFont(fontInfo.GetFontData(), GetDefaultCacheFlag());
}
else
{
fontProgram = FontProgramFactory.CreateFont(fontInfo.GetFontName(), GetDefaultCacheFlag());
}
}
String encoding = fontInfo.GetEncoding();
if (encoding == null || encoding.Length == 0)
{
encoding = GetDefaultEncoding(fontProgram);
}
pdfFont = PdfFontFactory.CreateFont(fontProgram, encoding, GetDefaultEmbeddingFlag());
}
catch (System.IO.IOException e) {
throw new PdfException(PdfException.IoExceptionWhileCreatingFont, e);
}
pdfFonts.Put(fontInfo, pdfFont);
return(pdfFont);
}
}
internal virtual FontSelector Get(FontSelectorKey key, FontSet fontSet)
{
if (fontSet == null)
{
return(Get(key));
}
else
{
FontSelectorCache.FontSetSelectors selectors = caches.Get(fontSet.GetId());
if (selectors == null)
{
caches.Put(fontSet.GetId(), selectors = new FontSelectorCache.FontSetSelectors());
}
if (Update(selectors, fontSet))
{
return(null);
}
else
{
return(selectors.map.Get(key));
}
}
}
/// <summary>
/// Create
/// <see cref="FontSelector"/>
/// or get from cache.
/// </summary>
/// <param name="fontFamilies">target font families</param>
/// <param name="fc">
/// instance of
/// <see cref="FontCharacteristics"/>
/// .
/// </param>
/// <param name="tempFonts">set of temporary fonts.</param>
/// <returns>
/// an instance of
/// <see cref="FontSelector"/>
/// .
/// </returns>
/// <seealso cref="CreateFontSelector(System.Collections.Generic.ICollection{E}, System.Collections.Generic.IList{E}, FontCharacteristics)
/// ">}</seealso>
public FontSelector GetFontSelector(IList <String> fontFamilies, FontCharacteristics fc, FontSet tempFonts)
{
FontSelectorKey key = new FontSelectorKey(fontFamilies, fc);
FontSelector fontSelector = fontSelectorCache.Get(key, tempFonts);
if (fontSelector == null)
{
fontSelector = CreateFontSelector(fontSet.GetFonts(tempFonts), fontFamilies, fc);
fontSelectorCache.Put(key, fontSelector, tempFonts);
}
return(fontSelector);
}
public virtual FontSelectorStrategy GetStrategy(String text, IList <String> fontFamilies, FontCharacteristics
fc, FontSet additonalFonts)
{
return(new ComplexFontSelectorStrategy(text, GetFontSelector(fontFamilies, fc, additonalFonts), this, additonalFonts
));
}
/// <summary>Creates a new instance of FontProvider</summary>
/// <param name="fontSet">predefined set of fonts, could be null.</param>
public FontProvider(FontSet fontSet)
: this(fontSet, DEFAULT_FONT_FAMILY)
{
}
public ComplexFontSelectorStrategy(String text, FontSelector selector, FontProvider provider, FontSet tempFonts
)
: base(text, provider, tempFonts)
{
this.font = null;
this.selector = selector;
}
/// <summary>Creates a new instance of FontProvider</summary>
/// <param name="fontSet">predefined set of fonts, could be null.</param>
public FontProvider(FontSet fontSet)
{
this.fontSet = fontSet != null ? fontSet : new FontSet();
pdfFonts = new Dictionary <FontInfo, PdfFont>();
fontSelectorCache = new FontSelectorCache(this.fontSet);
}
