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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed 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.
*/
package android.graphics;
import android.util.Xml;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
/**
* Parser for font config files.
*
* @hide
*/
public class FontListParser {
public static class Config {
Config() {
families = new ArrayList<Family>();
aliases = new ArrayList<Alias>();
}
public List<Family> families;
public List<Alias> aliases;
}
public static class Font {
Font(String fontName, int weight, boolean isItalic) {
this.fontName = fontName;
this.weight = weight;
this.isItalic = isItalic;
}
public String fontName;
public int weight;
public boolean isItalic;
}
public static class Alias {
public String name;
public String toName;
public int weight;
}
public static class Family {
public Family(String name, List<Font> fonts, String lang, String variant) {
this.name = name;
this.fonts = fonts;
this.lang = lang;
this.variant = variant;
}
public String name;
public List<Font> fonts;
public String lang;
public String variant;
}
/* Parse fallback list (no names) */
public static Config parse(File configFilename, String fontDir)
throws XmlPullParserException, IOException {
FileInputStream in = null;
in = new FileInputStream(configFilename);
return FontListParser.parse(in, fontDir);
}
/* Parse fallback list (no names) */
public static Config parse(InputStream in, String fontDir)
throws XmlPullParserException, IOException {
BufferedInputStream bis = null;
try {
// wrap input stream in a BufferedInputStream, if it's not already, for mark support
if (!(in instanceof BufferedInputStream)) {
bis = new BufferedInputStream(in);
} else {
bis = (BufferedInputStream) in;
}
// mark the beginning so we can reset to this position after checking format
bis.mark(in.available());
if (isLegacyFormat(bis)) {
return parseLegacyFormat(bis, fontDir);
} else {
return parseNormalFormat(bis, fontDir);
}
} finally {
if (bis != null) bis.close();
}
}
public static boolean isLegacyFormat(InputStream in)
throws XmlPullParserException, IOException {
if (!in.markSupported()) {
throw new IllegalArgumentException("InputStream does not support mark");
}
boolean isLegacy = false;
XmlPullParser parser = Xml.newPullParser();
parser.setInput(in, null);
parser.nextTag();
parser.require(XmlPullParser.START_TAG, null, "familyset");
String version = parser.getAttributeValue(null, "version");
isLegacy = version == null;
// reset the stream so we can read it
in.reset();
return isLegacy;
}
public static Config parseLegacyFormat(InputStream in, String dirName)
throws XmlPullParserException, IOException {
try {
List<LegacyFontListParser.Family> legacyFamilies = LegacyFontListParser.parse(in);
FontListConverter converter = new FontListConverter(legacyFamilies, dirName);
return converter.convert();
} finally {
in.close();
}
}
public static Config parseNormalFormat(InputStream in, String dirName)
throws XmlPullParserException, IOException {
XmlPullParser parser = Xml.newPullParser();
parser.setInput(in, null);
parser.nextTag();
return readFamilies(parser, dirName);
}
private static Config readFamilies(XmlPullParser parser, String dirPath)
throws XmlPullParserException, IOException {
Config config = new Config();
parser.require(XmlPullParser.START_TAG, null, "familyset");
while (parser.next() != XmlPullParser.END_TAG) {
if (parser.getEventType() != XmlPullParser.START_TAG) continue;
if (parser.getName().equals("family")) {
config.families.add(readFamily(parser, dirPath));
} else if (parser.getName().equals("alias")) {
config.aliases.add(readAlias(parser));
} else {
skip(parser);
}
}
return config;
}
private static Family readFamily(XmlPullParser parser, String dirPath)
throws XmlPullParserException, IOException {
String name = parser.getAttributeValue(null, "name");
String lang = parser.getAttributeValue(null, "lang");
String variant = parser.getAttributeValue(null, "variant");
List<Font> fonts = new ArrayList<Font>();
while (parser.next() != XmlPullParser.END_TAG) {
if (parser.getEventType() != XmlPullParser.START_TAG) continue;
String tag = parser.getName();
if (tag.equals("font")) {
String weightStr = parser.getAttributeValue(null, "weight");
int weight = weightStr == null ? 400 : Integer.parseInt(weightStr);
boolean isItalic = "italic".equals(parser.getAttributeValue(null, "style"));
String filename = parser.nextText();
String fullFilename = dirPath + File.separatorChar + filename;
fonts.add(new Font(fullFilename, weight, isItalic));
} else {
skip(parser);
}
}
return new Family(name, fonts, lang, variant);
}
private static Alias readAlias(XmlPullParser parser)
throws XmlPullParserException, IOException {
Alias alias = new Alias();
alias.name = parser.getAttributeValue(null, "name");
alias.toName = parser.getAttributeValue(null, "to");
String weightStr = parser.getAttributeValue(null, "weight");
if (weightStr == null) {
alias.weight = 400;
} else {
alias.weight = Integer.parseInt(weightStr);
}
skip(parser); // alias tag is empty, ignore any contents and consume end tag
return alias;
}
private static void skip(XmlPullParser parser) throws XmlPullParserException, IOException {
int depth = 1;
while (depth > 0) {
switch (parser.next()) {
case XmlPullParser.START_TAG:
depth++;
break;
case XmlPullParser.END_TAG:
depth--;
break;
}
}
}
}
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