/*
* Copyright 2007 Google Inc.
*
* 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 com.google.gwt.libideas.resources.rebind.context;
import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.user.rebind.SourceWriter;
class InlineResourceContext extends StaticResourceContext {
/**
* The largest file size that will be inlined. Note that this value is taken
* before any encodings are applied.
*/
// The JLS specifies a maximum size for any string to be 2^16 characters, so
// we'll leave some padding. Assuming a Base64 encoding, it is true that
// (2 ^ 15) * 4/3 < 2 ^ 16, so we can safely inline files up to 32k.
private static final int MAX_INLINE_SIZE = 2 << 15;
InlineResourceContext(TreeLogger logger, GeneratorContext context,
JClassType resourceBundleType, SourceWriter sw) {
super(logger, context, resourceBundleType, sw);
}
@Override
public String addToOutput(String suggestedFileName, String mimeType,
byte[] data, boolean xhrCompatible) throws UnableToCompleteException {
TreeLogger logger = getLogger();
// data: URLs are not compatible with XHRs on FF and Safari browsers
if ((!xhrCompatible) && (data.length < MAX_INLINE_SIZE)) {
logger.log(TreeLogger.DEBUG, "Inlining", null);
// This is bad, but I am lazy and don't want to write _another_ encoder
sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
String base64Contents = enc.encode(data).replaceAll("\\s+", "");
return "\"data:" + mimeType + ";base64," + base64Contents + "\"";
} else {
return super.addToOutput(suggestedFileName, mimeType, data, true);
}
}
}