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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.autodetect;
import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.io.DirectoryWalker;
import org.apache.commons.io.filefilter.FileFilterUtils;
import org.apache.commons.io.filefilter.IOFileFilter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Helps to autodetect/locate available operating system fonts.
*/
public class FontFileFinder extends DirectoryWalker implements FontFinder {
/** logging instance */
private final Log log = LogFactory.getLog(FontFileFinder.class);
/** default depth limit of recursion when searching for font files **/
public static final int DEFAULT_DEPTH_LIMIT = -1;
/**
* Default constructor
*/
public FontFileFinder() {
super(getDirectoryFilter(), getFileFilter(), DEFAULT_DEPTH_LIMIT);
}
/**
* Constructor
* @param depthLimit recursion depth limit
*/
public FontFileFinder(int depthLimit) {
super(getDirectoryFilter(), getFileFilter(), depthLimit);
}
/**
* Font directory filter. Currently ignores hidden directories.
* @return IOFileFilter font directory filter
*/
protected static IOFileFilter getDirectoryFilter() {
return FileFilterUtils.andFileFilter(
FileFilterUtils.directoryFileFilter(),
FileFilterUtils.notFileFilter(FileFilterUtils.prefixFileFilter("."))
);
}
/**
* Font file filter. Currently searches for files with .ttf and .pfb extensions.
* @return IOFileFilter font file filter
*/
protected static IOFileFilter getFileFilter() {
return FileFilterUtils.andFileFilter(
FileFilterUtils.fileFileFilter(),
FileFilterUtils.orFileFilter(
FileFilterUtils.suffixFileFilter(".ttf"),
FileFilterUtils.suffixFileFilter(".pfb")
)
);
}
/**
* @param directory directory to handle
* @param depth recursion depth
* @param results collection
* @return whether directory should be handled
* @see org.apache.commons.io.DirectoryWalker#handleDirectory(File, int, Collection)
*/
protected boolean handleDirectory(File directory, int depth, Collection results) {
return true;
}
/**
* @param file file to handle
* @param depth recursion depth
* @param results collection
* @see org.apache.commons.io.DirectoryWalker#handleFile(File, int, Collection)
*/
protected void handleFile(File file, int depth, Collection results) {
results.add(file);
}
/**
* @param directory the directory being processed
* @param depth the current directory level
* @param results the colleciton of results objects
* @see org.apache.commons.io.DirectoryWalker.handleDirectoryEnd
*/
protected void handleDirectoryEnd(File directory, int depth, Collection results) {
if (log.isDebugEnabled()) {
log.debug(directory + ": found " + results.size() + " font"
+ ((results.size() == 1) ? "" : "s"));
}
}
/**
* Automagically finds a list of font files on local system
*
* @return list of font files
* @throws IOException io exception
* @see org.apache.fop.fonts.autodetect.FontFinder#find()
*/
public List find() throws IOException {
final FontFinder fontDirFinder;
final String osName = System.getProperty("os.name");
if (osName.startsWith("Windows")) {
fontDirFinder = new WindowsFontDirFinder();
} else {
if (osName.startsWith("Mac")) {
fontDirFinder = new MacFontDirFinder();
} else {
fontDirFinder = new UnixFontDirFinder();
}
}
List fontDirs = fontDirFinder.find();
List results = new java.util.ArrayList();
for (Iterator iter = fontDirs.iterator(); iter.hasNext();) {
super.walk((File)iter.next(), results);
}
return results;
}
/**
* Searches a given directory for font files
*
* @param dir directory to search
* @return list of font files
* @throws IOException io exception
*/
public List find(String dir) throws IOException {
List results = new java.util.ArrayList();
super.walk(new File(dir), results);
return results;
}
}
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