/* * 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.fonts; //Java import java.io.IOException; import java.net.URI; import java.net.URISyntaxException; import java.util.ArrayList; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; import javax.xml.parsers.SAXParserFactory; import org.xml.sax.Attributes; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import org.xml.sax.XMLReader; import org.xml.sax.helpers.DefaultHandler; import org.apache.fop.apps.FOPException; import org.apache.fop.apps.io.InternalResourceResolver; import org.apache.fop.fonts.apps.TTFReader; /** * Class for reading a metric.xml file and creating a font object. * Typical usage: *
 * FontReader reader = new FontReader();
 * reader.setFontEmbedPath();
 * reader.useKerning(true);
 * Font f = reader.getFont();
 * 
*/ public class FontReader extends DefaultHandler { private boolean isCID; private CustomFont returnFont; private MultiByteFont multiFont; private SingleByteFont singleFont; private final InternalResourceResolver resourceResolver; private StringBuffer text = new StringBuffer(); private List cidWidths; //private int cidWidthIndex; private Map currentKerning; private List bfranges; /** * Construct a FontReader object from a path to a metric.xml file * and read metric data * @param source Source of the font metric file * @throws FOPException if loading the font fails */ public FontReader(InputSource source, InternalResourceResolver resourceResolver) throws FOPException { this.resourceResolver = resourceResolver; createFont(source); } private void createFont(InputSource source) throws FOPException { XMLReader parser = null; try { final SAXParserFactory factory = javax.xml.parsers.SAXParserFactory.newInstance(); factory.setNamespaceAware(true); parser = factory.newSAXParser().getXMLReader(); } catch (Exception e) { throw new FOPException(e); } 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(source); } 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. * @param path URI for the embeddable file */ public void setFontEmbedURI(URI path) { returnFont.setEmbedURI(path); } /** * Enable/disable use of kerning for the font * @param enabled true to enable kerning, false to disable */ public void setKerningEnabled(boolean enabled) { returnFont.setKerningEnabled(enabled); } /** * Enable/disable use of advanced typographic features for the font * @param enabled true to enable, false to disable */ public void setAdvancedEnabled(boolean enabled) { returnFont.setAdvancedEnabled(enabled); } /** * Get the generated font object * @return the font */ public Typeface getFont() { return returnFont; } /** * {@inheritDoc} */ @Override public void startDocument() { } /** * {@inheritDoc} */ public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { if (localName.equals("font-metrics")) { if ("TYPE0".equals(attributes.getValue("type"))) { multiFont = new MultiByteFont(resourceResolver); returnFont = multiFont; isCID = true; TTFReader.checkMetricsVersion(attributes); } else if ("TRUETYPE".equals(attributes.getValue("type"))) { singleFont = new SingleByteFont(resourceResolver); singleFont.setFontType(FontType.TRUETYPE); returnFont = singleFont; isCID = false; TTFReader.checkMetricsVersion(attributes); } else { singleFont = new SingleByteFont(resourceResolver); singleFont.setFontType(FontType.TYPE1); returnFont = singleFont; isCID = false; } } else if ("embed".equals(localName)) { try { returnFont.setEmbedURI(InternalResourceResolver.cleanURI(attributes.getValue("file"))); } catch (URISyntaxException e) { throw new SAXException("URI syntax error in metrics file: " + e.getMessage(), e); } returnFont.setEmbedResourceName(attributes.getValue("class")); } else if ("cid-widths".equals(localName)) { // This is unused // cidWidthIndex = getInt(attributes.getValue("start-index")); cidWidths = new ArrayList(); } else if ("kerning".equals(localName)) { currentKerning = new HashMap(); returnFont.putKerningEntry(getInt(attributes.getValue("kpx1")), currentKerning); } else if ("bfranges".equals(localName)) { bfranges = new ArrayList(); } else if ("bf".equals(localName)) { CMapSegment entry = new CMapSegment(getInt(attributes.getValue("us")), getInt(attributes.getValue("ue")), getInt(attributes.getValue("gi"))); bfranges.add(entry); } else if ("wx".equals(localName)) { cidWidths.add(getInt(attributes.getValue("w"))); // } else if ("widths".equals(localName)) { // singleFont.width = new int[256]; } else if ("char".equals(localName)) { try { singleFont.setWidth(getInt(attributes.getValue("idx")), getInt(attributes.getValue("wdt"))); } catch (NumberFormatException ne) { throw new SAXException("Malformed width in metric file: " + ne.getMessage(), ne); } } else if ("pair".equals(localName)) { currentKerning.put(getInt(attributes.getValue("kpx2")), getInt(attributes.getValue("kern"))); } } private int getInt(String str) throws SAXException { int ret = 0; try { ret = Integer.parseInt(str); } catch (Exception e) { throw new SAXException("Error while parsing integer value: " + str, e); } return ret; } /** * {@inheritDoc} */ @Override public void endElement(String uri, String localName, String qName) throws SAXException { String content = text.toString().trim(); if ("font-name".equals(localName)) { returnFont.setFontName(content); } else if ("full-name".equals(localName)) { returnFont.setFullName(content); } else if ("family-name".equals(localName)) { Set s = new HashSet(); s.add(content); returnFont.setFamilyNames(s); } else if ("ttc-name".equals(localName) && isCID) { multiFont.setTTCName(content); } else if ("encoding".equals(localName)) { if (singleFont != null && singleFont.getFontType() == FontType.TYPE1) { singleFont.setEncoding(content); } } else if ("cap-height".equals(localName)) { returnFont.setCapHeight(getInt(content)); } else if ("x-height".equals(localName)) { returnFont.setXHeight(getInt(content)); } else if ("ascender".equals(localName)) { returnFont.setAscender(getInt(content)); } else if ("descender".equals(localName)) { returnFont.setDescender(getInt(content)); } else if ("left".equals(localName)) { int[] bbox = returnFont.getFontBBox(); bbox[0] = getInt(content); returnFont.setFontBBox(bbox); } else if ("bottom".equals(localName)) { int[] bbox = returnFont.getFontBBox(); bbox[1] = getInt(content); returnFont.setFontBBox(bbox); } else if ("right".equals(localName)) { int[] bbox = returnFont.getFontBBox(); bbox[2] = getInt(content); returnFont.setFontBBox(bbox); } else if ("top".equals(localName)) { int[] bbox = returnFont.getFontBBox(); bbox[3] = getInt(content); returnFont.setFontBBox(bbox); } else if ("first-char".equals(localName)) { returnFont.setFirstChar(getInt(content)); } else if ("last-char".equals(localName)) { returnFont.setLastChar(getInt(content)); } else if ("flags".equals(localName)) { returnFont.setFlags(getInt(content)); } else if ("stemv".equals(localName)) { returnFont.setStemV(getInt(content)); } else if ("italic-angle".equals(localName)) { returnFont.setItalicAngle(getInt(content)); } else if ("missing-width".equals(localName)) { returnFont.setMissingWidth(getInt(content)); } else if ("cid-type".equals(localName)) { multiFont.setCIDType(CIDFontType.byName(content)); } else if ("default-width".equals(localName)) { multiFont.setDefaultWidth(getInt(content)); } else if ("cid-widths".equals(localName)) { int[] wds = new int[cidWidths.size()]; int j = 0; for (int count = 0; count < cidWidths.size(); count++) { wds[j++] = cidWidths.get(count).intValue(); } //multiFont.addCIDWidthEntry(cidWidthIndex, wds); multiFont.setWidthArray(wds); } else if ("bfranges".equals(localName)) { multiFont.setCMap(bfranges.toArray(new CMapSegment[0])); } text.setLength(0); //Reset text buffer (see characters()) } /** * {@inheritDoc} */ @Override public void characters(char[] ch, int start, int length) { text.append(ch, start, length); } }