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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.fonts;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.List;
import java.util.regex.Pattern;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.xmlgraphics.io.ResourceResolver;
import org.apache.fop.apps.FOPException;
import org.apache.fop.apps.io.InternalResourceResolver;
import org.apache.fop.apps.io.ResourceResolverFactory;
import org.apache.fop.fonts.substitute.FontSubstitutions;
import org.apache.fop.fonts.substitute.FontSubstitutionsConfigurator;
import org.apache.fop.util.LogUtil;
/**
* Configurator of the FontManager
*/
public class FontManagerConfigurator {
/** logger instance */
private static Log log = LogFactory.getLog(FontManagerConfigurator.class);
private final Configuration cfg;
private final URI defaultBaseUri;
private final ResourceResolver resourceResolver;
/**
* Main constructor
* @param cfg the font manager configuration object
* @param defaultBaseUri the default URI base to use for URI resolution
* @param resourceResolver the resource resolver
*/
public FontManagerConfigurator(Configuration cfg, URI defaultBaseUri,
ResourceResolver resourceResolver) {
this.cfg = cfg;
this.defaultBaseUri = defaultBaseUri;
this.resourceResolver = resourceResolver;
}
/**
* Initializes font settings from the user configuration
* @param fontManager a font manager
* @param strict true if strict checking of the configuration is enabled
* @throws FOPException if an exception occurs while processing the configuration
*/
public void configure(FontManager fontManager, boolean strict) throws FOPException {
if (cfg.getChild("font-base", false) != null) {
try {
URI fontBase = InternalResourceResolver.getBaseURI(cfg.getChild("font-base")
.getValue(null));
fontManager.setResourceResolver(ResourceResolverFactory.createInternalResourceResolver(
defaultBaseUri.resolve(fontBase), resourceResolver));
} catch (URISyntaxException use) {
LogUtil.handleException(log, use, true);
}
} else {
fontManager.setResourceResolver(ResourceResolverFactory.createInternalResourceResolver(
defaultBaseUri, resourceResolver));
}
// caching (fonts)
if (cfg.getChild("use-cache", false) != null) {
try {
if (!cfg.getChild("use-cache").getValueAsBoolean()) {
fontManager.disableFontCache();
} else {
if (cfg.getChild("cache-file", false) != null) {
fontManager.setCacheFile(URI.create(cfg.getChild("cache-file").getValue()));
}
}
} catch (ConfigurationException mfue) {
LogUtil.handleException(log, mfue, true);
}
}
// [GA] permit configuration control over base14 kerning; without this,
// there is no way for a user to enable base14 kerning other than by
// programmatic API;
if (cfg.getChild("base14-kerning", false) != null) {
try {
fontManager
.setBase14KerningEnabled(cfg.getChild("base14-kerning").getValueAsBoolean());
} catch (ConfigurationException e) {
LogUtil.handleException(log, e, true);
}
}
// global font configuration
Configuration fontsCfg = cfg.getChild("fonts", false);
if (fontsCfg != null) {
// font substitution
Configuration substitutionsCfg = fontsCfg.getChild("substitutions", false);
if (substitutionsCfg != null) {
FontSubstitutions substitutions = new FontSubstitutions();
new FontSubstitutionsConfigurator(substitutionsCfg).configure(substitutions);
fontManager.setFontSubstitutions(substitutions);
}
// referenced fonts (fonts which are not to be embedded)
Configuration referencedFontsCfg = fontsCfg.getChild("referenced-fonts", false);
if (referencedFontsCfg != null) {
FontTriplet.Matcher matcher = createFontsMatcher(
referencedFontsCfg, strict);
fontManager.setReferencedFontsMatcher(matcher);
}
}
}
/**
* Creates a font triplet matcher from a configuration object.
* @param cfg the configuration object
* @param strict true for strict configuraton error handling
* @return the font matcher
* @throws FOPException if an error occurs while building the matcher
*/
public static FontTriplet.Matcher createFontsMatcher(
Configuration cfg, boolean strict) throws FOPException {
List<FontTriplet.Matcher> matcherList = new java.util.ArrayList<FontTriplet.Matcher>();
Configuration[] matches = cfg.getChildren("match");
for (int i = 0; i < matches.length; i++) {
try {
matcherList.add(new FontFamilyRegExFontTripletMatcher(
matches[i].getAttribute("font-family")));
} catch (ConfigurationException ce) {
LogUtil.handleException(log, ce, strict);
continue;
}
}
FontTriplet.Matcher orMatcher = new OrFontTripletMatcher(
matcherList.toArray(new FontTriplet.Matcher[matcherList.size()]));
return orMatcher;
}
/**
* Creates a font triplet matcher from a configuration object.
* @param fontFamilies the list of font families
* @param strict true for strict configuraton error handling
* @return the font matcher
* @throws FOPException if an error occurs while building the matcher
*/
public static FontTriplet.Matcher createFontsMatcher(
List<String> fontFamilies, boolean strict) throws FOPException {
List<FontTriplet.Matcher> matcherList = new java.util.ArrayList<FontTriplet.Matcher>();
for (String fontFamily : fontFamilies) {
matcherList.add(new FontFamilyRegExFontTripletMatcher(fontFamily));
}
FontTriplet.Matcher orMatcher = new OrFontTripletMatcher(
matcherList.toArray(new FontTriplet.Matcher[matcherList.size()]));
return orMatcher;
}
private static class OrFontTripletMatcher implements FontTriplet.Matcher {
private final FontTriplet.Matcher[] matchers;
public OrFontTripletMatcher(FontTriplet.Matcher[] matchers) {
this.matchers = matchers;
}
/** {@inheritDoc} */
public boolean matches(FontTriplet triplet) {
for (int i = 0, c = matchers.length; i < c; i++) {
if (matchers[i].matches(triplet)) {
return true;
}
}
return false;
}
}
private static class FontFamilyRegExFontTripletMatcher implements FontTriplet.Matcher {
private final Pattern regex;
public FontFamilyRegExFontTripletMatcher(String regex) {
this.regex = Pattern.compile(regex);
}
/** {@inheritDoc} */
public boolean matches(FontTriplet triplet) {
return regex.matcher(triplet.getName()).matches();
}
}
}
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