/*
* DBeaver - Universal Database Manager
* Copyright (C) 2010-2017 Serge Rider (serge@jkiss.org)
*
* 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 org.jkiss.dbeaver.ui.editors.sql.syntax.rules;
import org.eclipse.jface.text.rules.ICharacterScanner;
import org.eclipse.jface.text.rules.IRule;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.Token;
import org.jkiss.dbeaver.ui.editors.sql.syntax.SQLRuleManager;
import org.jkiss.dbeaver.ui.editors.sql.syntax.tokens.SQLSetDelimiterToken;
/**
* Delimiter redefien rule
*/
public class SQLDelimiterSetRule implements IRule {
private final String setDelimiterWord;
private final SQLSetDelimiterToken setDelimiterToken;
private final SQLDelimiterRule delimiterRule;
public SQLDelimiterSetRule(String setDelimiterWord, SQLSetDelimiterToken setDelimiterToken, SQLDelimiterRule delimiterRule) {
this.setDelimiterWord = setDelimiterWord;
this.setDelimiterToken = setDelimiterToken;
this.delimiterRule = delimiterRule;
}
@Override
public IToken evaluate(ICharacterScanner scanner) {
// Must be in the beginning of line
{
scanner.unread();
int prevChar = scanner.read();
if (prevChar != ICharacterScanner.EOF && prevChar != '\r' && prevChar != '\n') {
return Token.UNDEFINED;
}
}
for (int i = 0; i < setDelimiterWord.length(); i++) {
char c = setDelimiterWord.charAt(i);
final int nextChar = scanner.read();
if (Character.toUpperCase(nextChar) != c) {
// Doesn't match
for (int k = 0; k <= i; k++) {
scanner.unread();
}
return Token.UNDEFINED;
}
}
StringBuilder delimBuffer = new StringBuilder();
int next = scanner.read();
if (next == ICharacterScanner.EOF || next == '\n' || next == '\r') {
// Empty delimiter
scanner.unread();
} else {
if (!Character.isWhitespace(next)) {
for (int k = 0; k < setDelimiterWord.length() + 1; k++) {
scanner.unread();
}
return Token.UNDEFINED;
}
// Get everything till the end of line
for (; ; ) {
next = scanner.read();
if (next == ICharacterScanner.EOF || next == '\n' || next == '\r') {
break;
}
delimBuffer.append((char) next);
}
scanner.unread();
}
if (scanner instanceof SQLRuleManager && ((SQLRuleManager) scanner).isEvalMode()) {
final String newDelimiter = delimBuffer.toString().trim();
delimiterRule.changeDelimiter(newDelimiter);
}
return setDelimiterToken;
}
}