org.apache.fontbox.afm.AFMParser Source Code | www.androidadb.com

…Souce Code of org.apache.fontbox.afm.

/*

* Licensed to the Apache Software Foundation (ASF) under one or more

* contributor license agreements.

See the NOTICE file distributed with

* this work for additional information regarding copyright ownership.

* The ASF licenses this file to You under the Apache License, Version 2.0

* (the “License”); you may not use this file except in compliance with

* the License.

You may obtain a copy of the License at

*

*

http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an “AS IS” BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package org.apache.fontbox.afm;

import java.io.InputStream;

import java.io.IOException;

import java.util.StringTokenizer;

import org.apache.fontbox.util.BoundingBox;

/**

* This class is used to parse AFM(Adobe Font Metrics) documents.

*

* @see AFM Documentation

*

* @author Ben Litchfield (ben@benlitchfield.com)

* @version $Revision: 1.1 $

*/

public class AFMParser

{

/**

* This is a comment in a AFM file.

*/

public static final String COMMENT = “Comment”;

/**

* This is the constant used in the AFM file to start a font metrics item.

*/

public static final String START_FONT_METRICS = “StartFontMetrics”;

/**

* This is the constant used in the AFM file to end a font metrics item.

*/

public static final String END_FONT_METRICS = “EndFontMetrics”;

/**

* This is the font name.

*/

public static final String FONT_NAME = “FontName”;

/**

* This is the full name.

*/

public static final String FULL_NAME = “FullName”;

/**

* This is the Family name.

*/

public static final String FAMILY_NAME = “FamilyName”;

/**

* This is the weight.

*/

public static final String WEIGHT = “Weight”;

/**

* This is the font bounding box.

*/

public static final String FONT_BBOX = “FontBBox”;

/**

* This is the version of the font.

*/

public static final String VERSION = “Version”;

/**

* This is the notice.

*/

public static final String NOTICE = “Notice”;

/**

* This is the encoding scheme.

*/

public static final String ENCODING_SCHEME = “EncodingScheme”;

/**

* This is the mapping scheme.

*/

public static final String MAPPING_SCHEME = “MappingScheme”;

/**

* This is the escape character.

*/

public static final String ESC_CHAR = “EscChar”;

/**

* This is the character set.

*/

public static final String CHARACTER_SET = “CharacterSet”;

/**

* This is the characters attribute.

*/

public static final String CHARACTERS = “Characters”;

/**

* This will determine if this is a base font.

*/

public static final String IS_BASE_FONT = “IsBaseFont”;

/**

* This is the V Vector attribute.

*/

public static final String V_VECTOR = “VVector”;

/**

* This will tell if the V is fixed.

*/

public static final String IS_FIXED_V = “IsFixedV”;

/**

* This is the cap height attribute.

*/

public static final String CAP_HEIGHT = “CapHeight”;

/**

* This is the X height.

*/

public static final String X_HEIGHT = “XHeight”;

/**

* This is ascender attribute.

*/

public static final String ASCENDER = “Ascender”;

/**

* This is the descender attribute.

*/

public static final String DESCENDER = “Descender”;

/**

* The underline position.

*/

public static final String UNDERLINE_POSITION = “UnderlinePosition”;

/**

* This is the Underline thickness.

*/

public static final String UNDERLINE_THICKNESS = “UnderlineThickness”;

/**

* This is the italic angle.

*/

public static final String ITALIC_ANGLE = “ItalicAngle”;

/**

* This is the char width.

*/

public static final String CHAR_WIDTH = “CharWidth”;

/**

* This will determine if this is fixed pitch.

*/

public static final String IS_FIXED_PITCH = “IsFixedPitch”;

/**

* This is the start of character metrics.

*/

public static final String START_CHAR_METRICS = “StartCharMetrics”;

/**

* This is the end of character metrics.

*/

public static final String END_CHAR_METRICS = “EndCharMetrics”;

/**

* The character metrics c value.

*/

public static final String CHARMETRICS_C = “C”;

/**

* The character metrics c value.

*/

public static final String CHARMETRICS_CH = “CH”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_WX = “WX”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_W0X = “W0X”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_W1X = “W1X”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_WY = “WY”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_W0Y = “W0Y”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_W1Y = “W1Y”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_W = “W”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_W0 = “W0”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_W1 = “W1”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_VV = “VV”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_N = “N”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_B = “B”;

/**

* The character metrics value.

*/

public static final String CHARMETRICS_L = “L”;

/**

* The character metrics value.

*/

public static final String STD_HW = “StdHW”;

/**

* The character metrics value.

*/

public static final String STD_VW = “StdVW”;

/**

* This is the start of track kern data.

*/

public static final String START_TRACK_KERN = “StartTrackKern”;

/**

* This is the end of track kern data.

*/

public static final String END_TRACK_KERN = “EndTrackKern”;

/**

* This is the start of kern data.

*/

public static final String START_KERN_DATA = “StartKernData”;

/**

* This is the end of kern data.

*/

public static final String END_KERN_DATA = “EndKernData”;

/**

* This is the start of kern pairs data.

*/

public static final String START_KERN_PAIRS = “StartKernPairs”;

/**

* This is the end of kern pairs data.

*/

public static final String END_KERN_PAIRS = “EndKernPairs”;

/**

* This is the start of kern pairs data.

*/

public static final String START_KERN_PAIRS0 = “StartKernPairs0”;

/**

* This is the start of kern pairs data.

*/

public static final String START_KERN_PAIRS1 = “StartKernPairs1”;

/**

* This is the start compisites data section.

*/

public static final String START_COMPOSITES = “StartComposites”;

/**

* This is the end compisites data section.

*/

public static final String END_COMPOSITES = “EndComposites”;

/**

* This is a composite character.

*/

public static final String CC = “CC”;

/**

* This is a composite charater part.

*/

public static final String PCC = “PCC”;

/**

* This is a kern pair.

*/

public static final String KERN_PAIR_KP = “KP”;

/**

* This is a kern pair.

*/

public static final String KERN_PAIR_KPH = “KPH”;

/**

* This is a kern pair.

*/

public static final String KERN_PAIR_KPX = “KPX”;

/**

* This is a kern pair.

*/

public static final String KERN_PAIR_KPY = “KPY”;

private static final int BITS_IN_HEX = 16;

private InputStream input;

private FontMetric result;

/**

* A method to test parsing of all AFM documents in the resources

* directory.

*

* @param args Ignored.

*

* @throws IOException If there is an error parsing one of the documents.

*/

public static void main( String[] args ) throws IOException

{

java.io.File afmDir = new java.io.File( “Resources/afm” );

java.io.File[] files = afmDir.listFiles();

for( int i=0; i< files.length; i++ ) { if( files[i].getPath().toUpperCase().endsWith( ".AFM" ) ) { long start = System.currentTimeMillis(); java.io.FileInputStream input = new java.io.FileInputStream( files[i] ); AFMParser parser = new AFMParser( input ); parser.parse(); long stop = System.currentTimeMillis(); System.out.println( "Parsing:" + files[i].getPath() + " " + (stop-start) ); } } } /** * Constructor. * * @param in The input stream to read the AFM document from. */ public AFMParser( InputStream in ) { input = in; } /** * This will parse the AFM document. This will close the Input stream * when the parsing is finished. * * @throws IOException If there is an IO error reading the document. */ public void parse() throws IOException { result = parseFontMetric(); } /** * This will get the result of the parsing. * * @return The parsed java object. */ public FontMetric getResult() { return result; } /** * This will parse a font metrics item. * * @return The parse font metrics item. * * @throws IOException If there is an error reading the AFM file. */ private FontMetric parseFontMetric() throws IOException { FontMetric fontMetrics = new FontMetric(); String startFontMetrics = readString(); if( !START_FONT_METRICS.equals( startFontMetrics ) ) { throw new IOException( "Error: The AFM file should start with " + START_FONT_METRICS + " and not '" + startFontMetrics + "'" ); } fontMetrics.setAFMVersion( readFloat() ); String nextCommand = null; while( !END_FONT_METRICS.equals( (nextCommand = readString() ) ) ) { if( FONT_NAME.equals( nextCommand ) ) { fontMetrics.setFontName( readLine() ); } else if( FULL_NAME.equals( nextCommand ) ) { fontMetrics.setFullName( readLine() ); } else if( FAMILY_NAME.equals( nextCommand ) ) { fontMetrics.setFamilyName( readLine() ); } else if( WEIGHT.equals( nextCommand ) ) { fontMetrics.setWeight( readLine() ); } else if( FONT_BBOX.equals( nextCommand ) ) { BoundingBox bBox = new BoundingBox(); bBox.setLowerLeftX( readFloat() ); bBox.setLowerLeftY( readFloat() ); bBox.setUpperRightX( readFloat() ); bBox.setUpperRightY( readFloat() ); fontMetrics.setFontBBox( bBox ); } else if( VERSION.equals( nextCommand ) ) { fontMetrics.setFontVersion( readLine() ); } else if( NOTICE.equals( nextCommand ) ) { fontMetrics.setNotice( readLine() ); } else if( ENCODING_SCHEME.equals( nextCommand ) ) { fontMetrics.setEncodingScheme( readLine() ); } else if( MAPPING_SCHEME.equals( nextCommand ) ) { fontMetrics.setMappingScheme( readInt() ); } else if( ESC_CHAR.equals( nextCommand ) ) { fontMetrics.setEscChar( readInt() ); } else if( CHARACTER_SET.equals( nextCommand ) ) { fontMetrics.setCharacterSet( readLine() ); } else if( CHARACTERS.equals( nextCommand ) ) { fontMetrics.setCharacters( readInt() ); } else if( IS_BASE_FONT.equals( nextCommand ) ) { fontMetrics.setIsBaseFont( readBoolean() ); } else if( V_VECTOR.equals( nextCommand ) ) { float[] vector = new float[2]; vector[0] = readFloat(); vector[1] = readFloat(); fontMetrics.setVVector( vector ); } else if( IS_FIXED_V.equals( nextCommand ) ) { fontMetrics.setIsFixedV( readBoolean() ); } else if( CAP_HEIGHT.equals( nextCommand ) ) { fontMetrics.setCapHeight( readFloat() ); } else if( X_HEIGHT.equals( nextCommand ) ) { fontMetrics.setXHeight( readFloat() ); } else if( ASCENDER.equals( nextCommand ) ) { fontMetrics.setAscender( readFloat() ); } else if( DESCENDER.equals( nextCommand ) ) { fontMetrics.setDescender( readFloat() ); } else if( STD_HW.equals( nextCommand ) ) { fontMetrics.setStandardHorizontalWidth( readFloat() ); } else if( STD_VW.equals( nextCommand ) ) { fontMetrics.setStandardVerticalWidth( readFloat() ); } else if( COMMENT.equals( nextCommand ) ) { fontMetrics.addComment( readLine() ); } else if( UNDERLINE_POSITION.equals( nextCommand ) ) { fontMetrics.setUnderlinePosition( readFloat() ); } else if( UNDERLINE_THICKNESS.equals( nextCommand ) ) { fontMetrics.setUnderlineThickness( readFloat() ); } else if( ITALIC_ANGLE.equals( nextCommand ) ) { fontMetrics.setItalicAngle( readFloat() ); } else if( CHAR_WIDTH.equals( nextCommand ) ) { float[] widths = new float[2]; widths[0] = readFloat(); widths[1] = readFloat(); fontMetrics.setCharWidth( widths ); } else if( IS_FIXED_PITCH.equals( nextCommand ) ) { fontMetrics.setFixedPitch( readBoolean() ); } else if( START_CHAR_METRICS.equals( nextCommand ) ) { int count = readInt(); for( int i=0; i= 2 not='” + hexString );

}

if( hexString.charAt( 0 ) != ‘<' || hexString.charAt( hexString.length() -1 ) != '>‘ )

{

throw new IOException( “String should be enclosed by angle brackets ‘” + hexString+ “‘” );

}

hexString = hexString.substring( 1, hexString.length() -1 );

byte[] data = new byte[ (hexString.length() / 2) ];

for( int i=0; i or FF, the spec is a little

//unclear, wait and see if it breaks anything.

String charCode = metricsTokenizer.nextToken();

charMetric.setCharacterCode( Integer.parseInt( charCode, BITS_IN_HEX ) );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_WX ) )

{

String wx = metricsTokenizer.nextToken();

charMetric.setWx( Float.parseFloat( wx ) );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_W0X ) )

{

String w0x = metricsTokenizer.nextToken();

charMetric.setW0x( Float.parseFloat( w0x ) );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_W1X ) )

{

String w1x = metricsTokenizer.nextToken();

charMetric.setW0x( Float.parseFloat( w1x ) );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_WY ) )

{

String wy = metricsTokenizer.nextToken();

charMetric.setWy( Float.parseFloat( wy ) );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_W0Y ) )

{

String w0y = metricsTokenizer.nextToken();

charMetric.setW0y( Float.parseFloat( w0y ) );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_W1Y ) )

{

String w1y = metricsTokenizer.nextToken();

charMetric.setW0y( Float.parseFloat( w1y ) );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_W ) )

{

String w0 = metricsTokenizer.nextToken();

String w1 = metricsTokenizer.nextToken();

float[] w = new float[2];

w[0] = Float.parseFloat( w0 );

w[1] = Float.parseFloat( w1 );

charMetric.setW( w );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_W0 ) )

{

String w00 = metricsTokenizer.nextToken();

String w01 = metricsTokenizer.nextToken();

float[] w0 = new float[2];

w0[0] = Float.parseFloat( w00 );

w0[1] = Float.parseFloat( w01 );

charMetric.setW0( w0 );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_W1 ) )

{

String w10 = metricsTokenizer.nextToken();

String w11 = metricsTokenizer.nextToken();

float[] w1 = new float[2];

w1[0] = Float.parseFloat( w10 );

w1[1] = Float.parseFloat( w11 );

charMetric.setW1( w1 );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_VV ) )

{

String vv0 = metricsTokenizer.nextToken();

String vv1 = metricsTokenizer.nextToken();

float[] vv = new float[2];

vv[0] = Float.parseFloat( vv0 );

vv[1] = Float.parseFloat( vv1 );

charMetric.setVv( vv );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_N ) )

{

String name = metricsTokenizer.nextToken();

charMetric.setName( name );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_B ) )

{

String llx = metricsTokenizer.nextToken();

String lly = metricsTokenizer.nextToken();

String urx = metricsTokenizer.nextToken();

String ury = metricsTokenizer.nextToken();

BoundingBox box = new BoundingBox();

box.setLowerLeftX( Float.parseFloat( llx ) );

box.setLowerLeftY( Float.parseFloat( lly ) );

box.setUpperRightX( Float.parseFloat( urx ) );

box.setUpperRightY( Float.parseFloat( ury ) );

charMetric.setBoundingBox( box );

verifySemicolon( metricsTokenizer );

}

else if( nextCommand.equals( CHARMETRICS_L ) )

{

String successor = metricsTokenizer.nextToken();

String ligature = metricsTokenizer.nextToken();

Ligature lig = new Ligature();

lig.setSuccessor( successor );

lig.setLigature( ligature );

charMetric.addLigature( lig );

verifySemicolon( metricsTokenizer );

}

else

{

throw new IOException( “Unknown CharMetrics command ‘” + nextCommand + “‘” );

}

}

}

catch( NumberFormatException e )

{

throw new IOException( “Error: Corrupt AFM document:”

+ e );

}

return charMetric;

}

/**

* This is used to verify that a semicolon is the next token in the stream.

*

* @param tokenizer The tokenizer to read from.

*

* @throws IOException If the semicolon is missing.

*/

private void verifySemicolon( StringTokenizer tokenizer ) throws IOException

{

if( tokenizer.hasMoreTokens() )

{

String semicolon = tokenizer.nextToken();

if( !semicolon.equals( “;” ) )

{

throw new IOException( “Error: Expected semicolon in stream actual='” +

semicolon + “‘” );

}

}

else

{

throw new IOException( “CharMetrics is missing a semicolon after a command” );

}

}

/**

* This will read a boolean from the stream.

*

* @return The boolean in the stream.

*/

private boolean readBoolean() throws IOException

{

String theBoolean = readString();

return Boolean.valueOf( theBoolean ).booleanValue();

}

/**

* This will read an integer from the stream.

*

* @return The integer in the stream.

*/

private int readInt() throws IOException

{

String theInt = readString();

try

{

return Integer.parseInt( theInt );

}

catch( NumberFormatException e )

{

throw new IOException( “Error parsing AFM document:” + e );

}

}

/**

* This will read a float from the stream.

*

* @return The float in the stream.

*/

private float readFloat() throws IOException

{

String theFloat = readString();

return Float.parseFloat( theFloat );

}

/**

* This will read until the end of a line.

*

* @return The string that is read.

*/

private String readLine() throws IOException

{

//First skip the whitespace

StringBuffer buf = new StringBuffer();

int nextByte = input.read();

while( isWhitespace( nextByte ) )

{

nextByte = input.read();

//do nothing just skip the whitespace.

}

buf.append( (char)nextByte );

//now read the data

while( !isEOL(nextByte = input.read()) )

{

buf.append( (char)nextByte );

}

return buf.toString();

}

/**

* This will read a string from the input stream and stop at any whitespace.

*

* @return The string read from the stream.

*

* @throws IOException If an IO error occurs when reading from the stream.

*/

private String readString() throws IOException

{

//First skip the whitespace

StringBuffer buf = new StringBuffer();

int nextByte = input.read();

while( isWhitespace( nextByte ) )

{

nextByte = input.read();

//do nothing just skip the whitespace.

}

buf.append( (char)nextByte );

//now read the data

while( !isWhitespace(nextByte = input.read()) )

{

buf.append( (char)nextByte );

}

return buf.toString();

}

/**

* This will determine if the byte is a whitespace character or not.

*

* @param character The character to test for whitespace.

*

* @return true If the character is whitespace as defined by the AFM spec.

*/

private boolean isEOL( int character )

{

return character == 0x0D ||

character == 0x0A;

}

/**

* This will determine if the byte is a whitespace character or not.

*

* @param character The character to test for whitespace.

*

* @return true If the character is whitespace as defined by the AFM spec.

*/

private boolean isWhitespace( int character )

{

return character == ‘ ‘ ||

character == ‘\t’ ||

character == 0x0D ||

character == 0x0A;

}

}

Related Class of org.apache.fontbox.afm.AFMParser

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