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/*
* 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.tika.parser.font;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import org.apache.fontbox.afm.AFMParser;
import org.apache.fontbox.afm.FontMetrics;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.metadata.Property;
import org.apache.tika.metadata.TikaCoreProperties;
import org.apache.tika.mime.MediaType;
import org.apache.tika.parser.AbstractParser;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* Parser for AFM Font Files
*/
public class AdobeFontMetricParser extends AbstractParser {
/** Serial version UID */
private static final long serialVersionUID = -4820306522217196835L;
private static final MediaType AFM_TYPE =
MediaType.application( "x-font-adobe-metric" );
private static final Set SUPPORTED_TYPES = Collections.singleton(AFM_TYPE);
// TIKA-1325 Replace these with properties, from a well known standard
static final String MET_AVG_CHAR_WIDTH = "AvgCharacterWidth";
static final String MET_DOC_VERSION = "DocVersion";
static final String MET_PS_NAME = "PSName";
static final String MET_FONT_NAME = "FontName";
static final String MET_FONT_FULL_NAME = "FontFullName";
static final String MET_FONT_FAMILY_NAME = "FontFamilyName";
static final String MET_FONT_SUB_FAMILY_NAME = "FontSubFamilyName";
static final String MET_FONT_VERSION = "FontVersion";
static final String MET_FONT_WEIGHT = "FontWeight";
static final String MET_FONT_NOTICE = "FontNotice";
static final String MET_FONT_UNDERLINE_THICKNESS = "FontUnderlineThickness";
public Set getSupportedTypes( ParseContext context ) {
return SUPPORTED_TYPES;
}
public void parse(InputStream stream, ContentHandler handler,
Metadata metadata, ParseContext context)
throws IOException, SAXException, TikaException {
FontMetrics fontMetrics;
AFMParser parser = new AFMParser( stream );
// Have FontBox process the file
fontMetrics = parser.parse();
// Get the comments in the file to display in xhtml
List unModifiableComments = fontMetrics.getComments();
//have to copy because we modify list in extractCreationDate
List comments = new ArrayList<>();
for (String comment : unModifiableComments) {
comments.add(comment);
}
// Get the creation date
extractCreationDate( metadata, comments );
metadata.set( Metadata.CONTENT_TYPE, AFM_TYPE.toString() );
metadata.set( TikaCoreProperties.TITLE, fontMetrics.getFullName() );
// Add metadata associated with the font type
addMetadataByString( metadata, MET_AVG_CHAR_WIDTH, Float.toString( fontMetrics.getAverageCharacterWidth() ) );
addMetadataByString( metadata, MET_DOC_VERSION, Float.toString( fontMetrics.getAFMVersion() ) );
addMetadataByString( metadata, MET_FONT_NAME, fontMetrics.getFontName() );
addMetadataByString( metadata, MET_FONT_FULL_NAME, fontMetrics.getFullName() );
addMetadataByString( metadata, MET_FONT_FAMILY_NAME, fontMetrics.getFamilyName() );
addMetadataByString( metadata, MET_FONT_VERSION, fontMetrics.getFontVersion() );
addMetadataByString( metadata, MET_FONT_WEIGHT, fontMetrics.getWeight() );
addMetadataByString( metadata, MET_FONT_NOTICE, fontMetrics.getNotice() );
addMetadataByString( metadata, MET_FONT_UNDERLINE_THICKNESS, Float.toString( fontMetrics.getUnderlineThickness() ) );
// Output the remaining comments as text
XHTMLContentHandler xhtml = new XHTMLContentHandler( handler, metadata );
xhtml.startDocument();
// Display the comments
if (comments.size() > 0) {
xhtml.element( "h1", "Comments" );
xhtml.startElement("div", "class", "comments");
for (String comment : comments) {
xhtml.element( "p", comment );
}
xhtml.endElement("div");
}
xhtml.endDocument();
}
private void addMetadataByString( Metadata metadata, String name, String value ) {
// Add metadata if an appropriate value is passed
if (value != null) {
metadata.add( name, value );
}
}
private void addMetadataByProperty( Metadata metadata, Property property, String value ) {
// Add metadata if an appropriate value is passed
if (value != null)
{
metadata.set( property, value );
}
}
private void extractCreationDate( Metadata metadata, List comments ) {
String date = null;
for (String value : comments) {
// Look for the creation date
if( value.matches( ".*Creation\\sDate.*" ) ) {
date = value.substring( value.indexOf( ":" ) + 2 );
comments.remove( value );
break;
}
}
// If appropriate date then store as metadata
if( date != null ) {
addMetadataByProperty( metadata, Metadata.CREATION_DATE, date );
}
}
}
