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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.
*/
/* $Id$ */
package org.apache.fop.pdf;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.fop.fonts.FontType;
/**
* Class representing a /Font object.
* <p>
* A more complete object expressing the base font name and encoding of a
* font along with an internal name for the font used within
* streams of content.
* <p>
* Fonts are specified on page 198 and onwards of the PDF 1.3 spec.
*/
public class PDFFont extends PDFDictionary {
/** Internal F-number for each font (it is not written to the font dict) */
private String fontname;
/**
* create the /Font object
*
* @param fontname the internal name for the font
* @param subtype the font's subtype
* @param basefont the base font name
* @param encoding the character encoding schema used by the font
*/
public PDFFont(String fontname, FontType subtype,
String basefont,
Object encoding) {
/* generic creation of PDF object */
super();
this.fontname = fontname;
put("Type", new PDFName("Font"));
put("Subtype", getPDFNameForFontType(subtype));
//put("Name", new PDFName(fontname));
put("BaseFont", new PDFName(basefont));
if (encoding instanceof PDFEncoding) {
setEncoding((PDFEncoding)encoding);
} else if (encoding instanceof String) {
setEncoding((String)encoding);
}
}
/**
* Sets the Encoding value of the font.
* @param encoding the encoding
*/
public void setEncoding(String encoding) {
if (encoding != null && !PDFEncoding.hasStandardEncoding(encoding)) {
put("Encoding", new PDFName(encoding));
}
}
/**
* Sets the Encoding value of the font.
* @param encoding the encoding
*/
public void setEncoding(PDFEncoding encoding) {
if (encoding != null) {
put("Encoding", encoding);
}
}
/**
* Sets a ToUnicode CMap.
* @param cmap the ToUnicode character map
*/
public void setToUnicode(PDFCMap cmap) {
put("ToUnicode", cmap);
}
/**
* factory method with the basic parameters
*
* @param fontname the internal name for the font
* @param subtype the font's subtype
* @param basefont the base font name
* @param encoding the character encoding schema used by the font
* @return the generated PDFFont object
*/
public static PDFFont createFont(String fontname,
FontType subtype, String basefont,
Object encoding) {
if (subtype == FontType.TYPE0) {
return new PDFFontType0(fontname, basefont,
encoding);
} else if ((subtype == FontType.TYPE1)
|| (subtype == FontType.MMTYPE1)) {
return new PDFFontType1(fontname, basefont,
encoding);
} else if (subtype == FontType.TYPE3) {
//return new PDFFontType3(number, fontname, basefont, encoding);
return null; //NYI
} else if (subtype == FontType.TRUETYPE) {
return new PDFFontTrueType(fontname, basefont,
encoding);
} else {
return null; // should not happen
}
}
/**
* Get the internal name used for this font.
* @return the internal name
*/
public String getName() {
return this.fontname;
}
/**
* Returns the name of the BaseFont.
* @return the BaseFont
*/
public PDFName getBaseFont() {
return (PDFName)get("BaseFont");
}
/**
* Returns the PDF name for a certain font type.
* @param fontType font type
* @return String corresponding PDF name
*/
protected PDFName getPDFNameForFontType(FontType fontType) {
if (fontType == FontType.TYPE0) {
return new PDFName(fontType.getName());
} else if (fontType == FontType.TYPE1) {
return new PDFName(fontType.getName());
} else if (fontType == FontType.MMTYPE1) {
return new PDFName(fontType.getName());
} else if (fontType == FontType.TYPE3) {
return new PDFName(fontType.getName());
} else if (fontType == FontType.TRUETYPE) {
return new PDFName(fontType.getName());
} else {
throw new IllegalArgumentException("Unsupported font type: " + fontType.getName());
}
}
/**
* Validates the PDF object prior to serialization.
*/
protected void validate() {
if (getDocumentSafely().getProfile().isFontEmbeddingRequired()) {
if (this.getClass() == PDFFont.class) {
throw new PDFConformanceException("For " + getDocumentSafely().getProfile()
+ ", all fonts, even the base 14"
+ " fonts, have to be embedded! Offending font: " + getBaseFont());
}
}
}
/** {@inheritDoc} */
public int output(OutputStream stream) throws IOException {
validate();
return super.output(stream);
}
}
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