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/*
* $Id$
* Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
* For details on use and redistribution please refer to the
* LICENSE file included with these sources.
*/
package org.apache.fop.render.pdf;
import org.apache.fop.render.pdf.fonts.*;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.XMLReader;
import org.xml.sax.SAXException;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.Attributes;
import java.io.IOException;
import java.util.Enumeration;
import java.util.ArrayList;
import java.util.Hashtable;
import org.apache.fop.pdf.PDFWArray;
import org.apache.fop.pdf.PDFCIDFont;
import org.apache.fop.configuration.ConfigurationReader;
import org.apache.fop.apps.FOPException;
/**
* Class for reading a metric.xml file and creating a font object.
* Typical usage:
* <pre>
* FontReader reader = new FontReader(<path til metrics.xml>);
* reader.setFontEmbedPath(<path to a .ttf or .pfb file or null to diable embedding>);
* reader.useKerning(true);
* Font f = reader.getFont();
* </pre>
*/
public class FontReader extends DefaultHandler {
private Locator locator = null;
private boolean isCID = false;
private MultiByteFont multiFont = null;
private SingleByteFont singleFont = null;
private Font returnFont = null;
// private SingleByteFont singleFont = null;
private String text = null;
private ArrayList cidWidths = null;
private int cidWidthIndex = 0;
private Hashtable currentKerning = null;
private ArrayList bfranges = null;
private void createFont(String path) throws FOPException {
XMLReader parser = ConfigurationReader.createParser();
if (parser == null)
throw new FOPException("Unable to create SAX parser");
try {
parser.setFeature("http://xml.org/sax/features/namespace-prefixes",
false);
} catch (SAXException e) {
throw new FOPException("You need a SAX parser which supports SAX version 2",
e);
}
parser.setContentHandler(this);
try {
parser.parse(path);
} catch (SAXException e) {
throw new FOPException(e);
} catch (IOException e) {
throw new FOPException(e);
}
}
/**
* Sets the path to embed a font. a null value disables font embedding
*/
public void setFontEmbedPath(String path) {
if (isCID)
multiFont.embedFileName = path;
else
singleFont.embedFileName = path;
}
/**
* Enable/disable use of kerning for the font
*/
public void useKerning(boolean kern) {
if (isCID)
multiFont.useKerning = true;
else
singleFont.useKerning = true;
}
/**
* Get the generated font object
*/
public Font getFont() {
return returnFont;
}
/**
* Construct a FontReader object from a path to a metric.xml file
* and read metric data
*/
public FontReader(String path) throws FOPException {
createFont(path);
}
public void startDocument() {}
public void setDocumentLocator(Locator locator) {
this.locator = locator;
}
public void startElement(String uri, String localName, String qName,
Attributes attributes) {
if (localName.equals("font-metrics")) {
if ("TYPE0".equals(attributes.getValue("type"))) {
multiFont = new MultiByteFont();
returnFont = multiFont;
isCID = true;
} else if ("TRUETYPE".equals(attributes.getValue("type"))) {
singleFont = new SingleByteFont();
singleFont.subType = org.apache.fop.pdf.PDFFont.TRUETYPE;
returnFont = singleFont;
isCID = false;
} else {
singleFont = new SingleByteFont();
singleFont.subType = org.apache.fop.pdf.PDFFont.TYPE1;
returnFont = singleFont;
isCID = false;
}
} else if ("embed".equals(localName)) {
if (isCID) {
// This *is* annoying... should create a common
// interface for sing/multibytefonts...
multiFont.embedFileName = attributes.getValue("file");
multiFont.embedResourceName = attributes.getValue("class");
} else {
singleFont.embedFileName = attributes.getValue("file");
singleFont.embedResourceName = attributes.getValue("class");
}
} else if ("cid-widths".equals(localName)) {
cidWidthIndex = getInt(attributes.getValue("start-index"));
cidWidths = new ArrayList();
} else if ("kerning".equals(localName)) {
currentKerning = new Hashtable();
if (isCID)
multiFont.kerning.put(new Integer(attributes.getValue("kpx1")),
currentKerning);
else
singleFont.kerning.put(new Integer(attributes.getValue("kpx1")),
currentKerning);
} else if ("bfranges".equals(localName)) {
bfranges = new ArrayList();
} else if ("bf".equals(localName)) {
BFEntry entry = new BFEntry();
entry.unicodeStart = getInt(attributes.getValue("us"));
entry.unicodeEnd = getInt(attributes.getValue("ue"));
entry.glyphStartIndex = getInt(attributes.getValue("gi"));
bfranges.add(entry);
} else if ("wx".equals(localName)) {
cidWidths.add(new Integer(attributes.getValue("w")));
} else if ("widths".equals(localName)) {
singleFont.width = new int[256];
} else if ("char".equals(localName)) {
try {
singleFont.width[Integer.parseInt(attributes.getValue("idx"))] =
Integer.parseInt(attributes.getValue("wdt"));
} catch (NumberFormatException ne) {
System.out.println("Malformed width in metric file: "
+ ne.getMessage());
}
} else if ("pair".equals(localName)) {
currentKerning.put(new Integer(attributes.getValue("kpx2")),
new Integer(attributes.getValue("kern")));
}
}
private int getInt(String str) {
int ret = 0;
try {
ret = Integer.parseInt(str);
} catch (Exception e) {}
return ret;
}
public void endElement(String uri, String localName, String qName) {
if ("font-name".equals(localName))
if (isCID)
multiFont.fontName = text;
else
singleFont.fontName = text;
if ("ttc-name".equals(localName) && isCID)
multiFont.ttcName = text;
else if ("cap-height".equals(localName))
if (isCID)
multiFont.capHeight = getInt(text);
else
singleFont.capHeight = getInt(text);
else if ("x-height".equals(localName))
if (isCID)
multiFont.xHeight = getInt(text);
else
singleFont.xHeight = getInt(text);
else if ("ascender".equals(localName))
if (isCID)
multiFont.ascender = getInt(text);
else
singleFont.ascender = getInt(text);
else if ("descender".equals(localName))
if (isCID)
multiFont.descender = getInt(text);
else
singleFont.descender = getInt(text);
else if ("left".equals(localName))
if (isCID)
multiFont.fontBBox[0] = getInt(text);
else
singleFont.fontBBox[0] = getInt(text);
else if ("bottom".equals(localName))
if (isCID)
multiFont.fontBBox[1] = getInt(text);
else
singleFont.fontBBox[1] = getInt(text);
else if ("right".equals(localName))
if (isCID)
multiFont.fontBBox[2] = getInt(text);
else
singleFont.fontBBox[2] = getInt(text);
else if ("first-char".equals(localName))
singleFont.firstChar = getInt(text);
else if ("last-char".equals(localName))
singleFont.lastChar = getInt(text);
else if ("top".equals(localName))
if (isCID)
multiFont.fontBBox[3] = getInt(text);
else
singleFont.fontBBox[3] = getInt(text);
else if ("flags".equals(localName))
if (isCID)
multiFont.flags = getInt(text);
else
singleFont.flags = getInt(text);
else if ("stemv".equals(localName))
if (isCID)
multiFont.stemV = getInt(text);
else
singleFont.stemV = getInt(text);
else if ("italic-angle".equals(localName))
if (isCID)
multiFont.italicAngle = getInt(text);
else
singleFont.italicAngle = getInt(text);
else if ("missing-width".equals(localName))
if (isCID)
multiFont.missingWidth = getInt(text);
else
singleFont.missingWidth = getInt(text);
else if ("cid-type".equals(localName)) {
if ("CIDFontType2".equals(text))
multiFont.cidType = PDFCIDFont.CID_TYPE2;
} else if ("default-width".equals(localName)) {
multiFont.defaultWidth = getInt(text);
} else if ("cid-widths".equals(localName)) {
int[] wds = new int[cidWidths.size()];
int j = 0;
for (int count = 0; count < cidWidths.size(); count++) {
Integer i = (Integer)cidWidths.get(count);
wds[j++] = i.intValue();
}
multiFont.warray.addEntry(cidWidthIndex, wds);
multiFont.width = wds;
} else if ("bfranges".equals(localName)) {
multiFont.bfentries = (BFEntry[])bfranges.toArray(new BFEntry[0]);
}
}
public void characters(char[] ch, int start, int length) {
char c[] = new char[length];
System.arraycopy(ch, start, c, 0, length);
text = new String(c);
}
}
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