org.apache.pdfbox.pdmodel.font

Class PDFont

java.lang.Object

org.apache.pdfbox.pdmodel.font.PDFont

All Implemented Interfaces:

org.apache.pdfbox.pdmodel.common.COSObjectable, org.apache.pdfbox.pdmodel.font.PDFontLike

public abstract class PDFont
extends Object
implements org.apache.pdfbox.pdmodel.common.COSObjectable, org.apache.pdfbox.pdmodel.font.PDFontLike

Since:

1.8

Author:

xsx

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.apache.pdfbox.util.Matrix	DEFAULT_FONT_MATRIX
protected org.apache.pdfbox.cos.COSDictionary	dict

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	PDFont(org.apache.pdfbox.cos.COSDictionary fontDictionary) Constructor.

Method Summary

Modifier and Type	Method and Description
abstract void	addToSubset(int codePoint) Adds the given Unicode point to the subset.
abstract byte[]	encode(int unicode) Encodes the given Unicode code point for use in a PDF content stream.
byte[]	encode(String text) Encodes the given string for use in a PDF content stream.
boolean	equals(Object other)
float	getAverageFontWidth() This will get the average font width for all characters.
org.apache.pdfbox.cos.COSDictionary	getCOSObject()
org.apache.pdfbox.util.Vector	getDisplacement(int code) Returns the displacement vector (w0, w1) in text space, for the given character.
org.apache.pdfbox.pdmodel.font.PDFontDescriptor	getFontDescriptor()
org.apache.pdfbox.util.Matrix	getFontMatrix()
org.apache.pdfbox.util.Vector	getPositionVector(int code)
float	getRealWidth(int code, float size)
float	getSpaceWidth() Determines the width of the space character.
protected org.apache.fontbox.afm.FontMetrics	getStandard14AFM() Returns the AFM if this is a Standard 14 font.
protected abstract float	getStandard14Width(int code) Returns the glyph width from the AFM if this is a Standard 14 font.
float	getStringWidth(String text) Returns the width of the given Unicode string.
String	getSubType() This will get the subtype of font.
protected org.apache.fontbox.cmap.CMap	getToUnicodeCMap() Get the /ToUnicode CMap.
String	getType() This will always return "Font" for fonts.
float	getWidth(int code)
protected List<Float>	getWidths() The widths of the characters.
int	hashCode()
boolean	isStandard14() Returns true if this font is one of the "Standard 14" fonts and receives special handling.
abstract boolean	isVertical() Returns true if the font uses vertical writing mode.
protected org.apache.fontbox.cmap.CMap	readCMap(org.apache.pdfbox.cos.COSBase base) Reads a CMap given a COS Stream or Name.
abstract int	readCode(InputStream in) Reads a character code from a content stream string.
protected void	setFontDescriptor(org.apache.pdfbox.pdmodel.font.PDFontDescriptor fontDescriptor) Sets the font descriptor when embedding a font.
abstract void	subset() Replaces this font with a subset containing only the given Unicode characters.
String	toString()
String	toUnicode(int code) Returns the Unicode character sequence which corresponds to the given character code.
String	toUnicode(int code, org.apache.pdfbox.pdmodel.font.encoding.GlyphList customGlyphList) Returns the Unicode character sequence which corresponds to the given character code.
abstract boolean	willBeSubset() Returns true if this font will be subset when embedded.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.pdfbox.pdmodel.font.PDFontLike

getBoundingBox, getHeight, getName, getWidthFromFont, hasExplicitWidth, isDamaged, isEmbedded

Field Detail

DEFAULT_FONT_MATRIX

protected static final org.apache.pdfbox.util.Matrix DEFAULT_FONT_MATRIX

dict

protected final org.apache.pdfbox.cos.COSDictionary dict

Constructor Detail

PDFont

protected PDFont(org.apache.pdfbox.cos.COSDictionary fontDictionary)

Constructor.

Parameters:

fontDictionary - Font dictionary.

Method Detail

getStandard14AFM

protected final org.apache.fontbox.afm.FontMetrics getStandard14AFM()

Returns the AFM if this is a Standard 14 font.

Returns:

the AFM

getFontDescriptor

public org.apache.pdfbox.pdmodel.font.PDFontDescriptor getFontDescriptor()

Specified by:

getFontDescriptor in interface org.apache.pdfbox.pdmodel.font.PDFontLike

setFontDescriptor

protected final void setFontDescriptor(org.apache.pdfbox.pdmodel.font.PDFontDescriptor fontDescriptor)

Sets the font descriptor when embedding a font.

Parameters:

fontDescriptor - font descriptor of the embedded font

readCMap

protected final org.apache.fontbox.cmap.CMap readCMap(org.apache.pdfbox.cos.COSBase base)
                                               throws IOException

Reads a CMap given a COS Stream or Name. May return null if a predefined CMap does not exist.

Parameters:

base - COSName or COSStream

Returns:

the CMap if present

Throws:

IOException - if the CMap could not be read

getCOSObject

public org.apache.pdfbox.cos.COSDictionary getCOSObject()

Specified by:

getCOSObject in interface org.apache.pdfbox.pdmodel.common.COSObjectable

getPositionVector

public org.apache.pdfbox.util.Vector getPositionVector(int code)

Specified by:

getPositionVector in interface org.apache.pdfbox.pdmodel.font.PDFontLike

getDisplacement

public org.apache.pdfbox.util.Vector getDisplacement(int code)
                                              throws IOException

Returns the displacement vector (w0, w1) in text space, for the given character. For horizontal text only the x component is used, for vertical text only the y component.

Parameters:

code - character code

Returns:

displacement vector

Throws:

IOException - if the data could not be read

getRealWidth

public float getRealWidth(int code,
                          float size)
                   throws IOException

Throws:

IOException

getWidth

public float getWidth(int code)
               throws IOException

Specified by:

getWidth in interface org.apache.pdfbox.pdmodel.font.PDFontLike

Throws:

IOException

getStandard14Width

protected abstract float getStandard14Width(int code)

Returns the glyph width from the AFM if this is a Standard 14 font.

Parameters:

code - character code

Returns:

width in 1/1000 text space

encode

public final byte[] encode(String text)
                    throws IOException

Encodes the given string for use in a PDF content stream.

Parameters:

text - Any Unicode text.

Returns:

Array of PDF content stream bytes.

Throws:

IOException - If the text could not be encoded.

IllegalArgumentException - if a character isn't supported by the font.

encode

public abstract byte[] encode(int unicode)
                       throws IOException

Encodes the given Unicode code point for use in a PDF content stream. Content streams use a multi-byte encoding with 1 to 4 bytes.

This method is called when embedding text in PDFs and when filling in fields.

Parameters:

unicode - Unicode code point.

Returns:

Array of 1 to 4 PDF content stream bytes.

Throws:

IOException - If the text could not be encoded.

IllegalArgumentException - if a character isn't supported by the font.

getStringWidth

public float getStringWidth(String text)
                     throws IOException

Returns the width of the given Unicode string.

Parameters:

text - The text to get the width of.

Returns:

The width of the string in 1/1000 units of text space.

Throws:

IOException - If there is an error getting the width information.

IllegalArgumentException - if a character isn't supported by the font.

getAverageFontWidth

public float getAverageFontWidth()

This will get the average font width for all characters.

Specified by:

getAverageFontWidth in interface org.apache.pdfbox.pdmodel.font.PDFontLike

Returns:

The width is in 1000 unit of text space, ie 333 or 777

readCode

public abstract int readCode(InputStream in)
                      throws IOException

Reads a character code from a content stream string. Codes may be up to 4 bytes long.

Parameters:

in - string stream

Returns:

character code

Throws:

IOException - if the CMap or stream cannot be read

toUnicode

public String toUnicode(int code,
                        org.apache.pdfbox.pdmodel.font.encoding.GlyphList customGlyphList)

Returns the Unicode character sequence which corresponds to the given character code.

Parameters:

code - character code

customGlyphList - a custom glyph list to use instead of the Adobe Glyph List

Returns:

Unicode character(s)

toUnicode

public String toUnicode(int code)

Returns the Unicode character sequence which corresponds to the given character code.

Parameters:

code - character code

Returns:

Unicode character(s)

getType

public String getType()

This will always return "Font" for fonts.

Returns:

The type of object that this is.

getSubType

public String getSubType()

This will get the subtype of font.

Returns:

the subtype

getWidths

protected final List<Float> getWidths()

The widths of the characters. This will be null for the standard 14 fonts.

Returns:

The widths of the characters.

getFontMatrix

public org.apache.pdfbox.util.Matrix getFontMatrix()

Specified by:

getFontMatrix in interface org.apache.pdfbox.pdmodel.font.PDFontLike

getSpaceWidth

public float getSpaceWidth()

Determines the width of the space character.

Returns:

the width of the space character

isVertical

public abstract boolean isVertical()

Returns true if the font uses vertical writing mode.

Returns:

true if the font uses vertical writing mode

isStandard14

public boolean isStandard14()

Returns true if this font is one of the "Standard 14" fonts and receives special handling.

Returns:

true if this font is one of the "Standard 14" fonts

addToSubset

public abstract void addToSubset(int codePoint)

Adds the given Unicode point to the subset.

Parameters:

codePoint - Unicode code point

subset

public abstract void subset()
                     throws IOException

Replaces this font with a subset containing only the given Unicode characters.

Throws:

IOException - if the subset could not be written

willBeSubset

public abstract boolean willBeSubset()

Returns true if this font will be subset when embedded.

Returns:

true if this font will be subset when embedded

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

getToUnicodeCMap

protected org.apache.fontbox.cmap.CMap getToUnicodeCMap()

Get the /ToUnicode CMap.

Returns:

The /ToUnicode CMap or null if there is none.