com.sun.javafx.css.converters.URLConverter Maven / Gradle / Ivy
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package com.sun.javafx.css.converters;
import com.sun.javafx.css.StyleConverterImpl;
import java.net.MalformedURLException;
import java.net.URL;
import javafx.css.ParsedValue;
import javafx.css.StyleConverter;
import javafx.scene.text.Font;
/**
* Convert url("") a URL string resolved relative to the location of the stylesheet.
*/
public final class URLConverter extends StyleConverterImpl {
// lazy, thread-safe instatiation
private static class Holder {
static URLConverter INSTANCE = new URLConverter();
static SequenceConverter SEQUENCE_INSTANCE = new SequenceConverter();
}
public static StyleConverter getInstance() {
return Holder.INSTANCE;
}
private URLConverter() {
super();
}
@Override
public String convert(ParsedValue value, Font font) {
String url = null;
try {
ParsedValue[] values = value.getValue();
// clean URI String
String uriStr = StringConverter.getInstance().convert(values[0], font);
if (uriStr.startsWith("url(")) {
uriStr = com.sun.javafx.Utils.stripQuotes(uriStr.substring(4, uriStr.length() - 1));
} else {
uriStr = com.sun.javafx.Utils.stripQuotes(uriStr);
}
URL stylesheetURL = values[1] != null ? (URL)values[1].getValue() : null;
URL resolvedURL = null;
if (stylesheetURL == null) {
try {
resolvedURL = new URL(uriStr);
} catch (MalformedURLException malf) {
// This may be a relative URL, so try resolving
// it using the application classloader
if (uriStr.startsWith("/")) uriStr = uriStr.substring(1);
final ClassLoader cl = Thread.currentThread().getContextClassLoader();
resolvedURL = cl.getResource(uriStr);
}
} else {
if (uriStr.startsWith("/")) uriStr = uriStr.substring(1);
// resolve doesn't work with opaque URI's, but this does.
resolvedURL = new URL(stylesheetURL, uriStr);
}
if (resolvedURL != null) url = resolvedURL.toExternalForm();
} catch (MalformedURLException malf) {
System.err.println("caught " + malf + " in 'URLType.convert'");
}
return url;
}
@Override
public String toString() {
return "URLType";
}
public static final class SequenceConverter extends StyleConverterImpl[], String[]> {
public static SequenceConverter getInstance() {
return Holder.SEQUENCE_INSTANCE;
}
private SequenceConverter() {
super();
}
@Override
public String[] convert(ParsedValue[], String[]> value, Font font) {
ParsedValue[] layers = value.getValue();
String[] urls = new String[layers.length];
for (int layer = 0; layer < layers.length; layer++) {
urls[layer] = URLConverter.getInstance().convert(layers[layer], font);
}
return urls;
}
@Override
public String toString() {
return "URLSeqType";
}
}
}