/**********************************************
* Copyright (C) 2010 Lukas Laag
* This file is part of lib-gwt-svg.
*
* libgwtsvg is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* libgwtsvg 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libgwtsvg. If not, see http://www.gnu.org/licenses/
**********************************************/
package org.vectomatic.dev.svg.impl.gen;
import java.net.URL;
import org.vectomatic.dom.svg.OMSVGSVGElement;
import org.vectomatic.dom.svg.ui.SVGResource;
import org.vectomatic.dom.svg.ui.SVGResource.Validated;
import org.vectomatic.dom.svg.utils.DOMHelper;
import org.vectomatic.dom.svg.utils.OMSVGParser;
import com.google.gwt.core.ext.Generator;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JMethod;
import com.google.gwt.dev.util.Util;
import com.google.gwt.resources.ext.AbstractResourceGenerator;
import com.google.gwt.resources.ext.ResourceContext;
import com.google.gwt.resources.ext.ResourceGeneratorUtil;
import com.google.gwt.safehtml.shared.SafeUri;
import com.google.gwt.safehtml.shared.UriUtils;
import com.google.gwt.user.rebind.SourceWriter;
import com.google.gwt.user.rebind.StringSourceWriter;
/**
* Provides implementations of SVGResource.
*/
public class SVGResourceGenerator extends AbstractResourceGenerator {
@Override
public String createAssignment(
TreeLogger logger,
ResourceContext context,
JMethod method) throws UnableToCompleteException {
// Extract the SVG name from the @Source annotation
URL[] resources = ResourceGeneratorUtil.findResources(logger, context, method);
if (resources.length != 1) {
logger.log(TreeLogger.ERROR, "Exactly one resource must be specified", null);
throw new UnableToCompleteException();
}
URL resource = resources[0];
// The SVGResource is implemented as an anonymous inner class
// xxx = new SVGResource() {
// public OMSVGSVGElement getSvg() {
// return OMSVGParser.parse("...");
// }
// };
String toWrite = Util.readURLAsString(resource);
if (getValidated(method)) {
SVGValidator.validate(toWrite, resource.toExternalForm(), logger, null);
}
SourceWriter sw = new StringSourceWriter();
sw.println("new " + SVGResource.class.getName() + "() {");
sw.indent();
sw.println("private String svg=\"" + Generator.escape(toWrite) + "\";");
// Convenience when examining the generated code.
sw.println("// " + resource.toExternalForm());
sw.println("@Override");
sw.println("public " + OMSVGSVGElement.class.getName() + " getSvg() {");
sw.indent();
sw.println("return " + OMSVGParser.class.getName() + ".parse(svg);");
sw.outdent();
sw.println("}");
sw.println("@Override");
sw.println("public String getName() {");
sw.indent();
sw.println("return \"" + method.getName() + "\";");
sw.outdent();
sw.println("}");
sw.println("@Override");
sw.println("public String getUrl() {");
sw.indent();
sw.println("return \"data:image/svg+xml;base64,\" + " + DOMHelper.class.getName() + ".base64encode(svg);");
sw.outdent();
sw.println("}");
sw.println("@Override");
sw.println("public " + SafeUri.class.getName() + " getSafeUri() {");
sw.indent();
sw.println("return " + UriUtils.class.getName() + ".fromSafeConstant(\"data:image/svg+xml;base64,\" + " + DOMHelper.class.getName() + ".base64encode(svg));");
sw.outdent();
sw.println("}");
sw.outdent();
sw.println("}");
return sw.toString();
}
private boolean getValidated(JMethod method) {
Validated validated = method.getAnnotation(Validated.class);
if (validated == null) {
return true;
} else {
return validated.validated();
}
}
}