/*
* 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.pdfbox.pdmodel.font;
import java.io.IOException;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSName;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Creates the appropriate font subtype based on information in the dictionary.
* @author Ben Litchfield
*/
public class PDFontFactory
{
private static final Log LOG = LogFactory.getLog(PDFontFactory.class);
private PDFontFactory()
{
}
/**
* Creates a new PDFont instance with the appropriate subclass.
*
* @param dictionary a font dictionary
* @return a PDFont instance, based on the SubType entry of the dictionary
* @throws IOException
*/
public static PDFont createFont(COSDictionary dictionary) throws IOException
{
COSName type = dictionary.getCOSName(COSName.TYPE, COSName.FONT);
if (!COSName.FONT.equals(type))
{
throw new IOException("Expected 'Font' dictionary but found '" + type.getName() + "'");
}
COSName subType = dictionary.getCOSName(COSName.SUBTYPE);
if (COSName.TYPE1.equals(subType))
{
COSBase fd = dictionary.getDictionaryObject(COSName.FONT_DESC);
if (fd != null && fd instanceof COSDictionary)
{
if (((COSDictionary)fd).containsKey(COSName.FONT_FILE3))
{
return new PDType1CFont(dictionary);
}
}
return new PDType1Font(dictionary);
}
else if (COSName.MM_TYPE1.equals(subType))
{
COSBase fd = dictionary.getDictionaryObject(COSName.FONT_DESC);
if (fd != null && fd instanceof COSDictionary)
{
if (((COSDictionary)fd).containsKey(COSName.FONT_FILE3))
{
return new PDType1CFont(dictionary);
}
}
return new PDMMType1Font(dictionary);
}
else if (COSName.TRUE_TYPE.equals(subType))
{
return new PDTrueTypeFont(dictionary);
}
else if (COSName.TYPE3.equals(subType))
{
return new PDType3Font(dictionary);
}
else if (COSName.TYPE0.equals(subType))
{
return new PDType0Font(dictionary);
}
else if (COSName.CID_FONT_TYPE0.equals(subType))
{
throw new IllegalArgumentException("Type 0 descendant font not allowed");
}
else if (COSName.CID_FONT_TYPE2.equals(subType))
{
throw new IllegalArgumentException("Type 0 descendant font not allowed");
}
else
{
// assuming Type 1 font (see PDFBOX-1988) because it seems that Adobe Reader does this
// however, we may need more sophisticated logic perhaps looking at the FontFile
LOG.warn("Invalid font subtype '" + subType + "'");
return new PDType1Font(dictionary);
}
}
/**
* Creates a new PDCIDFont instance with the appropriate subclass.
*
* @param dictionary descendant font dictionary
* @return a PDCIDFont instance, based on the SubType entry of the dictionary
* @throws IOException
*/
static PDCIDFont createDescendantFont(COSDictionary dictionary, PDType0Font parent)
throws IOException
{
COSName type = dictionary.getCOSName(COSName.TYPE, COSName.FONT);
if (!COSName.FONT.equals(type))
{
throw new IllegalArgumentException("Expected 'Font' dictionary but found '" + type.getName() + "'");
}
COSName subType = dictionary.getCOSName(COSName.SUBTYPE);
if (COSName.CID_FONT_TYPE0.equals(subType))
{
return new PDCIDFontType0(dictionary, parent);
}
else if (COSName.CID_FONT_TYPE2.equals(subType))
{
return new PDCIDFontType2(dictionary, parent);
}
else
{
throw new IOException("Invalid font type: " + type);
}
}
/**
* Create a default font
*
* @return a default font
* @throws IOException if something goes wrong
*/
public static PDFont createDefaultFont() throws IOException
{
COSDictionary dict = new COSDictionary();
dict.setItem(COSName.TYPE, COSName.FONT);
dict.setItem (COSName.SUBTYPE, COSName.TRUE_TYPE);
dict.setString(COSName.BASE_FONT, "Arial");
return createFont(dict);
}
}