Class AbstractFontSelectorStrategy
java.lang.Object
com.itextpdf.layout.font.selectorstrategy.AbstractFontSelectorStrategy
- All Implemented Interfaces:
IFontSelectorStrategy
- Direct Known Subclasses:
BestMatchFontSelectorStrategy
,FirstMatchFontSelectorStrategy
The class defines complex implementation of
IFontSelectorStrategy
which based on the following algorithm:
1. Find first significant symbol (not whitespace or special).
2. Find font which matches symbol according to passed FontSelector
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3. Try to append as many symbols as possible using the current font.
4. If symbol is not matched to the current font, go to step 1.
Algorithm takes care of the case when there is no matched font for symbol or when diacritic from another font is used (previous symbol will be processed by diacritic's font).
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate final FontSet
private final FontProvider
private final FontSelector
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Constructor Summary
ConstructorsConstructorDescriptionAbstractFontSelectorStrategy
(FontProvider fontProvider, FontSelector fontSelector, FontSet additionalFonts) Creates a new instance ofAbstractFontSelectorStrategy
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Method Summary
Modifier and TypeMethodDescriptionprivate static int
extractCodePoint
(String text, int idx) getGlyphLines
(String text) Converts text into glyphs with the best matching font.private static PdfFont
getPdfFont
(FontInfo fontInfo, FontProvider fontProvider, FontSet additionalFonts) Utility method to create PdfFont.protected abstract boolean
If it is necessary to provide a check that the best font for passed symbol equals to the current font.private static boolean
isSignificantUnicodeScript
(Character.UnicodeScript unicodeScript) protected PdfFont
matchFont
(int codePoint, FontSelector fontSelector, FontProvider fontProvider, FontSet additionalFonts) Finds the best font which matches passed symbol.private static int
nextSignificantIndex
(int startIndex, String text)
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Field Details
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fontProvider
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additionalFonts
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fontSelector
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Constructor Details
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AbstractFontSelectorStrategy
public AbstractFontSelectorStrategy(FontProvider fontProvider, FontSelector fontSelector, FontSet additionalFonts) Creates a new instance ofAbstractFontSelectorStrategy
.- Parameters:
fontProvider
- the font providerfontSelector
- the font selectoradditionalFonts
- the set of fonts to be used additionally to the fonts added to font provider.
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Method Details
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isCurrentFontCheckRequired
protected abstract boolean isCurrentFontCheckRequired()If it is necessary to provide a check that the best font for passed symbol equals to the current font. Result of checking is used to split text into parts in case if inequality.- Returns:
true
if check is needed, otherwisefalse
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getGlyphLines
Converts text into glyphs with the best matching font.- Specified by:
getGlyphLines
in interfaceIFontSelectorStrategy
- Parameters:
text
- the text to split- Returns:
- the glyphs with the matching font attached
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matchFont
protected PdfFont matchFont(int codePoint, FontSelector fontSelector, FontProvider fontProvider, FontSet additionalFonts) Finds the best font which matches passed symbol.- Parameters:
codePoint
- the symbol to matchfontSelector
- the font selectorfontProvider
- the font provideradditionalFonts
- the addition fonts- Returns:
- font which matches the symbol
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nextSignificantIndex
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isSignificantUnicodeScript
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extractCodePoint
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getPdfFont
private static PdfFont getPdfFont(FontInfo fontInfo, FontProvider fontProvider, FontSet additionalFonts) Utility method to create PdfFont.- Parameters:
fontInfo
- instance of FontInfo- Returns:
- cached or just created PdfFont on success, otherwise null
- See Also:
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