/*
* 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 com.stevesoft.pat.Regex;
import org.rythmengine.internal.IContext;
import org.rythmengine.internal.IParser;
import org.rythmengine.internal.Keyword;
import org.rythmengine.internal.Token;
import org.rythmengine.internal.parser.BlockCodeToken;
import org.rythmengine.internal.parser.RemoveLeadingSpacesIfLineBreakParser;
import org.rythmengine.utils.S;
public class IfParser extends KeywordParserFactory {
public static class IfBlockCodeToken extends BlockCodeToken {
public IfBlockCodeToken(String s, IContext context, int line) {
super(s, context);
this.line = line;
}
}
@Override
public IParser create(final IContext ctx) {
return new RemoveLeadingSpacesIfLineBreakParser(ctx) {
@Override
public Token go() {
Regex r = reg(dialect());
if (!r.search(remain())) {
raiseParseException("Error parsing @if statement. Correct usage: @if (some-condition) {some-template-code}");
}
final String matched = r.stringMatched();
int line = ctx.currentLine();
boolean leadingLB = !isLastBuilderLiteral();
if (matched.startsWith("\n") || matched.endsWith("\n")) {
if (matched.startsWith("\n")) {
leadingLB = true;
line++;
}
ctx.getCodeBuilder().addBuilder(new Token.StringToken("\n", ctx));
if (!matched.startsWith("\n")) {
Regex r0 = new Regex("\\n([ \\t\\x0B\\f]*).*");
if (r0.search(matched)) {
String blank = r0.stringMatched(1);
if (blank.length() > 0) {
ctx.getCodeBuilder().addBuilder(new Token.StringToken(blank, ctx));
}
}
}
} else {
Regex r0 = new Regex("([ \\t\\x0B\\f]*).*");
if (r0.search(matched)) {
String blank = r0.stringMatched(1);
if (blank.length() > 0) {
ctx.getCodeBuilder().addBuilder(new Token.StringToken(blank, ctx));
}
}
}
String s = r.stringMatched(1);
ctx().step(s.length());
String sIf = r.stringMatched(3);
s = r.stringMatched(4);
s = ExpressionParser.processPositionPlaceHolder(s);
s = S.stripBrace(s);
if (s.endsWith("@")) {
s = s.substring(0, s.length() - 1);
s = "__eval(\"" + s + "\")";
}
if ("if".equalsIgnoreCase(sIf)) {
s = "\nif (org.rythmengine.utils.Eval.eval(" + s + ")) {";
} else {
s = "\nif (!org.rythmengine.utils.Eval.eval(" + s + ")) {";
}
//if (!s.endsWith("{")) s = "\n" + s + " {";
processFollowingOpenBraceAndLineBreak(leadingLB);
return new IfBlockCodeToken(s, ctx(), line);
}
};
}
@Override
public Keyword keyword() {
return Keyword.IF;
}
@Override
protected String patternStr() {
//return "(%s(%s\\s+\\(.*\\)(\\s*\\{)?)).*";
return "(^\\n?[ \\t\\x0B\\f]*%s(%s\\s*((?@()))([ \\t\\x0B\\f]*\\n?))).*";
}
}