org.apache.fop.fonts.FontDetectorFactory Maven / Gradle / Ivy
/*
* 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.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.List;
import org.apache.commons.io.FileUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.xmlgraphics.util.ClasspathResource;
import org.apache.fop.apps.FOPException;
import org.apache.fop.fonts.autodetect.FontFileFinder;
import org.apache.fop.util.LogUtil;
/**
* A factory that provides the font detecting machanism.
*/
public final class FontDetectorFactory {
private FontDetectorFactory() {
}
/**
* Creates the default font detector
* @return the default font detector
*/
public static FontDetector createDefault() {
return new DefaultFontDetector();
}
/**
* Creates a disabled font detector which, by definition, does nothing to detect fonts.
* @return the completely restricted font detector
*/
public static FontDetector createDisabled() {
return new DisabledFontDetector();
}
private static class DisabledFontDetector implements FontDetector {
public void detect(FontManager fontManager, FontAdder fontAdder, boolean strict,
FontEventListener eventListener, List fontInfoList)
throws FOPException {
// nop
}
}
/**
* Detector of operating system and classpath fonts
*/
private static class DefaultFontDetector implements FontDetector {
private static Log log = LogFactory.getLog(DefaultFontDetector.class);
private static final String[] FONT_MIMETYPES = {
"application/x-font", "application/x-font-truetype"
};
/**
* Detect installed fonts on the system
* @param fontInfoList a list of fontinfo to populate
* @throws FOPException thrown if a problem occurred during detection
*/
public void detect(FontManager fontManager, FontAdder fontAdder, boolean strict,
FontEventListener eventListener, List fontInfoList)
throws FOPException {
try {
// search in font base if it is defined and
// is a directory but don't recurse
FontFileFinder fontFileFinder = new FontFileFinder(eventListener);
URI fontBaseURI = fontManager.getResourceResolver().getBaseURI();
File fontBase = FileUtils.toFile(fontBaseURI.toURL());
if (fontBase != null) {
List fontURLList = fontFileFinder.find(fontBase.getAbsolutePath());
fontAdder.add(fontURLList, fontInfoList);
//Can only use the font base URL if it's a file URL
}
// native o/s font directory finding
List systemFontList;
systemFontList = fontFileFinder.find();
fontAdder.add(systemFontList, fontInfoList);
// classpath font finding
ClasspathResource resource = ClasspathResource.getInstance();
for (String mimeTypes : FONT_MIMETYPES) {
fontAdder.add(resource.listResourcesOfMimeType(mimeTypes), fontInfoList);
}
} catch (IOException e) {
LogUtil.handleException(log, e, strict);
} catch (URISyntaxException use) {
LogUtil.handleException(log, use, strict);
}
}
}
}