vikas kumar jagga created PDFBOX-4183:
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Summary: To support multi-lingual paragraphs without switching
Font objects
Key: PDFBOX-4183
URL: https://issues.apache.org/jira/browse/PDFBOX-4183
Project: PDFBox
Issue Type: New Feature
Components: FontBox
Reporter: vikas kumar jagga
Problem :- If a single paragraph has fonts of different languages we need to
detect the language and load the appropriate PDType0Font font file object
(holding ttf file) supporting that language fonts.
PDFbox library should provide a class with addFont() method that can hold
multiple PDType0Font objects (holding different ttf files) so that this object
holding multiple font files could be loaded in document object. It will reduce
the overhead to detect the language and then loading that ttf file object.
iText provide this feature with FontSelector class. Below is the sample code
usage.
{color:#14892c}import java.awt.Color;{color}
{color:#14892c}import org.apache.log4j.Logger;{color}
{color:#14892c}import com.lowagie.text.Font;{color}
{color:#14892c}import com.lowagie.text.pdf.BaseFont;{color}
{color:#14892c}import com.lowagie.text.pdf.FontSelector;{color}
{color:#14892c}public class Fonts {{color}
{color:#14892c}public static final int STYLE_BOLD = Font.BOLD;{color}
{color:#14892c} public static final int STYLE_BOLDITALIC =
Font.BOLDITALIC;{color}
{color:#14892c} public static final int STYLE_ITALIC = Font.ITALIC;{color}
{color:#14892c} public static final int STYLE_NORMAL = Font.NORMAL;{color}
{color:#14892c} public static final int STYLE_STRIKETHROUGH =
Font.STRIKETHRU;{color}
{color:#14892c} public static final int STYLE_UNDERLINE = Font.UNDERLINE;{color}
{color:#14892c} public static final BaseFont FONT_NOTO_SANS;{color}
{color:#14892c} public static final BaseFont FONT_NOTO_SANS_AR; // Arabic{color}
{color:#14892c} public static final BaseFont FONT_NOTO_SANS_TH; // Thai{color}
{color:#14892c} public static final BaseFont FONT_NOTO_SANS_CJK; // Chinese,
Japanese and Korean{color}
{color:#14892c}static {{color}
{color:#14892c}try {{color}
{color:#14892c} tmpNOTOSANS =
BaseFont.createFont("/fonts/NotoSans-Regular.ttf", BaseFont.IDENTITY_H,
BaseFont.EMBEDDED);{color}
{color:#14892c} }{color}
{color:#14892c} catch (Exception ex) {{color}
{color:#14892c} }{color}
{color:#14892c}try {{color}
{color:#14892c} tmpNOTOSANS_AR =
BaseFont.createFont("/fonts/NotoKufiArabic-Regular.ttf", BaseFont.IDENTITY_H,
BaseFont.EMBEDDED);{color}
{color:#14892c} }{color}
{color:#14892c} catch (Exception ex) {{color}
{color:#14892c} }{color}
{color:#14892c}try {{color}
{color:#14892c} tmpNOTOSANS_TH =
BaseFont.createFont("/fonts/NotoSansThai-Regular.ttf", BaseFont.IDENTITY_H,
BaseFont.EMBEDDED);{color}
{color:#14892c} }{color}
{color:#14892c} catch (Exception ex) {{color}
{color:#14892c} }{color}
{color:#14892c}try {{color}
{color:#14892c} tmpNOTOSANS_CJK =
BaseFont.createFont("/fonts/NotoSansCJK-Regular.ttf", BaseFont.IDENTITY_H,
BaseFont.NOT_EMBEDDED);{color}
{color:#14892c} }{color}
{color:#14892c} catch (Exception ex) {{color}
{color:#14892c} }{color}
{color:#14892c} FONT_NOTO_SANS = tmpNOTOSANS;{color}
{color:#14892c} FONT_NOTO_SANS_AR = tmpNOTOSANS_AR;{color}
{color:#14892c} FONT_NOTO_SANS_TH = tmpNOTOSANS_TH;{color}
{color:#14892c} FONT_NOTO_SANS_CJK = tmpNOTOSANS_CJK;{color}
{color:#14892c} }{color}
{color:#14892c}public static FontSelector returnFontSelector(float size, int
style) {{color}
{color:#14892c} return returnFontSelector(size, style, null);{color}
{color:#14892c} }{color}
{color:#14892c}public static FontSelector returnFontSelector(float size, int
style, Color color) {{color}
{color:#14892c} FontSelector multiFonts = new FontSelector();{color}
{color:#14892c} multiFonts.addFont(new Font(Fonts.FONT_NOTO_SANS, size, style,
color));{color}
{color:#14892c} multiFonts.addFont(new Font(Fonts.FONT_NOTO_SANS_AR, size,
style, color));{color}
{color:#14892c} multiFonts.addFont(new Font(Fonts.FONT_NOTO_SANS_TH, size,
style, color));{color}
{color:#14892c} multiFonts.addFont(new Font(Fonts.FONT_NOTO_SANS_CJK, size,
style, color));{color}
{color:#14892c} return multiFonts;{color}
{color:#14892c} }{color}
{color:#14892c}}{color}
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