/*
* Copyright 2009 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.template.soy.basicdirectives;
import com.google.common.collect.ImmutableSet;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.google.template.soy.data.SanitizedContent;
import com.google.template.soy.data.SanitizedContentOperator;
import com.google.template.soy.data.SoyData;
import com.google.template.soy.javasrc.restricted.JavaCodeUtils;
import com.google.template.soy.javasrc.restricted.JavaExpr;
import com.google.template.soy.javasrc.restricted.SoyJavaSrcPrintDirective;
import com.google.template.soy.jssrc.restricted.JsExpr;
import com.google.template.soy.jssrc.restricted.SoyJsSrcPrintDirective;
import com.google.template.soy.tofu.restricted.SoyAbstractTofuPrintDirective;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;
/**
* A directive that replaces newlines (\n, \r, or \r\n) with HTML line breaks (<br>).
*
* @author Felix Chang
*/
@Singleton
public class ChangeNewlineToBrDirective extends SoyAbstractTofuPrintDirective
implements SoyJsSrcPrintDirective, SoyJavaSrcPrintDirective, SanitizedContentOperator {
private static final Pattern NEWLINE_PATTERN = Pattern.compile("\\r\\n|\\r|\\n");
@Inject
public ChangeNewlineToBrDirective() {}
@Override public String getName() {
return "|changeNewlineToBr";
}
@Override public Set<Integer> getValidArgsSizes() {
return ImmutableSet.of(0);
}
@Override public boolean shouldCancelAutoescape() {
return false;
}
@Override public SoyData apply(SoyData value, List<SoyData> args) {
return SoyData.createFromExistingData(
NEWLINE_PATTERN.matcher(value.toString()).replaceAll("<br>"));
}
@Override public JsExpr applyForJsSrc(JsExpr value, List<JsExpr> args) {
return new JsExpr("soy.$$changeNewlineToBr(" + value.getText() + ")", Integer.MAX_VALUE);
}
@Override public JavaExpr applyForJavaSrc(JavaExpr value, List<JavaExpr> args) {
return new JavaExpr(
JavaCodeUtils.genFunctionCall(
JavaCodeUtils.UTILS_LIB + ".$$changeNewlineToBr", value.getText()),
String.class, Integer.MAX_VALUE);
}
@Override public SanitizedContent.ContentKind getContentKind() {
// This directive expects HTML as input and produces HTML as output.
return SanitizedContent.ContentKind.HTML;
}
}