/*
* Copyright (C) 2013 The Rythm Engine project
* Gelin Luo <greenlaw110(at)gmail.com>
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.rythmengine.internal.parser.build_in;
import org.rythmengine.extension.ICodeType;
import org.rythmengine.internal.IContext;
import org.rythmengine.internal.Token;
import org.rythmengine.internal.parser.CodeToken;
import org.rythmengine.internal.parser.ParserBase;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Detect if a code type block is reached and put
* instruction in template java source to switch
* code type context
* <p/>
* <p>For example when <script > is reached
* a instruction <code>pushCodeType(ICodeType type)</code>
* should be put in place</p>
*/
public class CodeTypeBlockStartSensor extends ParserBase {
public CodeTypeBlockStartSensor(IContext context) {
super(context);
}
private static Map<String, Pattern> patterns = new HashMap<String, Pattern>();
@Override
public Token go() {
IContext ctx = ctx();
ICodeType curType = ctx.peekCodeType();
if (!curType.allowInternalTypeBlock()) return null;
String remain = ctx.getRemain();
Iterable<ICodeType> types = ctx.getEngine().extensionManager().templateLangs();
for (ICodeType type : types) {
if (type.allowedExternalTypes().contains(curType)) {
String blockStart = type.blockStart();
if (null == blockStart) {
logger.warn("null block start found for lang[%s] inside lang[%s]", type, curType);
continue;
}
Pattern pStart = patterns.get(blockStart);
if (null == pStart) {
pStart = Pattern.compile(blockStart, Pattern.DOTALL);
patterns.put(blockStart, pStart);
}
Matcher m = pStart.matcher(remain);
if (m.matches()) {
ctx.pushCodeType(type);
String matched = m.group(1);
ctx.step(matched.length());
String s = matched;
if (matched.indexOf('@') > -1) {
// process internal template
char ch = s.charAt(0);
s = s.substring(1); //prevent CodeTypeBlockStartSensor to sense it again
String code = ctx.getCodeBuilder().addInlineInclude(s, ctx.currentLine());
if (matched.endsWith("\n")) {
code = code + ";p(\"\\n\");";
}
s = String.format("p('%s');", String.valueOf(ch)) + code + String.format(";__ctx.pushCodeType(%s);", type.newInstanceStr());
} else {
s = s.replaceAll("(\\r?\\n)+", "\\\\n").replaceAll("\"", "\\\\\"");
s = String.format("p(\"%s\");__ctx.pushCodeType(%s);", s, type.newInstanceStr());
}
return new CodeToken(s, ctx);
}
}
}
return null;
}
public static void main(String[] args) {
String s = "(<\\s*script[^<>]*?>).*";
Pattern p = Pattern.compile(s);
s = "<script src='@src'></script><script src='@src'></script>";
Matcher m = p.matcher(s);
System.out.println(m.matches());
System.out.println(m.group());
System.out.println(m.group(1));
}
}