com.google.gwt.codegen.server.SafeHtmlStringGenerator Maven / Gradle / Ivy
/*
* Copyright 2011 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.codegen.server;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
/**
* Helper class to produce string expressions consisting of literals and
* computed values.
*/
class SafeHtmlStringGenerator extends StringGenerator {
/**
* Fully-qualified class name of the SafeHtmlBuilder class.
*/
private static final String SAFE_HTML_BUILDER_FQCN = SafeHtmlBuilder.class.getCanonicalName();
/**
* Initialize the StringGenerator with an output buffer.
*
* @param buf output buffer
*/
SafeHtmlStringGenerator(StringBuilder buf) {
super(buf);
buf.append("new " + SAFE_HTML_BUILDER_FQCN + "()");
}
@Override
protected void afterExpression(Type type) {
buf.append(')');
}
@Override
protected void beforeExpression(Type type) {
switch (type) {
case LITERAL:
buf.append(".appendHtmlConstant(");
break;
case PRIMITIVE:
case SAFE:
buf.append(".append(");
break;
case OTHER:
buf.append(".appendEscaped(");
break;
}
}
@Override
protected void finishOutput() {
buf.append(".toSafeHtml()");
}
@Override
protected void forceStringPrefix() {
buf.append("String.valueOf(");
}
@Override
protected void forceStringSuffix() {
buf.append(")");
}
}