com.google.gwt.resources.rebind.context.InlineResourceContext Maven / Gradle / Ivy
/*
* Copyright 2008 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.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;
class InlineResourceContext extends StaticResourceContext {
/**
* String constants in Java have a maximum limit that we must obey.
*/
public static final int MAX_ENCODED_SIZE = (2 << 15) - 1;
InlineResourceContext(TreeLogger logger, GeneratorContext context,
JClassType resourceBundleType, ClientBundleContext clientBundleCtx) {
super(logger, context, resourceBundleType, clientBundleCtx);
}
@Override
public String deploy(String suggestedFileName, String mimeType, byte[] data,
boolean forceExternal) throws UnableToCompleteException {
TreeLogger logger = getLogger();
// data: URLs are not compatible with XHRs on FF and Safari browsers
if ((!forceExternal) && (data.length < MAX_INLINE_SIZE)) {
logger.log(TreeLogger.DEBUG, "Inlining", null);
String base64Contents = toBase64(data);
// CHECKSTYLE_OFF
String encoded = "\"data:" + mimeType.replaceAll("\"", "\\\\\"")
+ ";base64," + base64Contents + "\"";
// CHECKSTYLE_ON
/*
* We know that the encoded format will be one byte per character, since
* we're using only ASCII characters.
*/
if (encoded.length() < MAX_ENCODED_SIZE) {
return encoded;
}
}
return super.deploy(suggestedFileName, mimeType, data, true);
}
@Override
public boolean supportsDataUrls() {
return true;
}
}