com.google.gwt.resources.rg.AbstractCssResourceGenerator Maven / Gradle / Ivy
/*
* Copyright 2013 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.rg;
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.core.ext.typeinfo.JMethod;
import com.google.gwt.dom.client.StyleInjector;
import com.google.gwt.resources.ext.AbstractResourceGenerator;
import com.google.gwt.resources.ext.ResourceContext;
import com.google.gwt.user.rebind.SourceWriter;
/**
* Base class for CSS resource generators.
*/
public abstract class AbstractCssResourceGenerator extends AbstractResourceGenerator {
/**
* Returns the java expression that contains the compiled CSS.
*
* @throws UnableToCompleteException
*/
protected abstract String getCssExpression(TreeLogger logger, ResourceContext context,
JMethod method) throws UnableToCompleteException;
protected boolean isReturnTypeString(JClassType classReturnType) {
return (classReturnType != null
&& String.class.getName().equals(classReturnType.getQualifiedSourceName()));
}
protected void writeEnsureInjected(SourceWriter sw) {
sw.println("private boolean injected;");
sw.println("public boolean ensureInjected() {");
sw.indent();
sw.println("if (!injected) {");
sw.indentln("injected = true;");
sw.indentln(StyleInjector.class.getName() + ".inject(getText());");
sw.indentln("return true;");
sw.println("}");
sw.println("return false;");
sw.outdent();
sw.println("}");
}
protected void writeGetName(JMethod method, SourceWriter sw) {
sw.println("public String getName() {");
sw.indentln("return \"" + method.getName() + "\";");
sw.println("}");
}
protected void writeGetText(TreeLogger logger, ResourceContext context, JMethod method,
SourceWriter sw) throws UnableToCompleteException {
String cssExpression = getCssExpression(logger, context, method);
sw.println("public String getText() {");
sw.indentln("return " + cssExpression + ";");
sw.println("}");
}
protected void writeSimpleGetter(JMethod methodToImplement, String toReturn, SourceWriter sw) {
sw.print(methodToImplement.getReadableDeclaration(false, true, true, true, true));
sw.println(" {");
sw.indentln("return " + toReturn + ";");
sw.println("}");
}
}