jsyntaxpane.actions.JUnindentAction Maven / Gradle / Ivy

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/*
 * Copyright 2008 Ayman Al-Sairafi [email protected]
 *
 * 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 jsyntaxpane.actions;

import java.awt.event.ActionEvent;
import javax.swing.text.BadLocationException;
import javax.swing.text.JTextComponent;
import jsyntaxpane.SyntaxDocument;
import jsyntaxpane.Token;

public class JUnindentAction extends DefaultSyntaxAction {

    /**
     * creates new JUnindentAction.
     * Initial Code contributed by ser... AT mail.ru
     */
    public JUnindentAction() {
        super("JUNINDENT");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void actionPerformed(JTextComponent target, SyntaxDocument sDoc,
            int dot, ActionEvent e) {
        int pos = target.getCaretPosition();
        int start = sDoc.getParagraphElement(pos).getStartOffset();
        String line = ActionUtils.getLine(target);
        if (ActionUtils.isEmptyOrBlanks(line)) {
            try {
                sDoc.insertString(pos, "}", null);
                Token t = sDoc.getPairFor(sDoc.getTokenAt(pos));
                if (null != t) {
                    String pairLine = ActionUtils.getLineAt(target, t.start);
                    String indent = ActionUtils.getIndent(pairLine);
                    sDoc.replace(start, line.length() + 1, indent + "}", null);
                }
            } catch (BadLocationException ble) {
                target.replaceSelection("}");
            }
        } else {
            target.replaceSelection("}");
        }
    }
}