/*
 * Copyright 2011-17 Fraunhofer ISE, energy & meteo Systems GmbH and other contributors
 *
 * 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.openmuc.openiec61850.clientgui.databind;

import javax.swing.JComponent;
import javax.swing.JTextField;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.DocumentFilter;
import javax.swing.text.PlainDocument;

import org.openmuc.openiec61850.BasicDataAttribute;
import org.openmuc.openiec61850.BdaType;
import org.openmuc.openiec61850.clientgui.BasicDataBind;

public abstract class TextFieldDataBind<E extends BasicDataAttribute> extends BasicDataBind<E> {

    private final DocumentFilter filter;
    protected JTextField inputField;

    public TextFieldDataBind(E data, BdaType type, AbstractFilter filter) {
        super(data, type);
        this.filter = filter;
    }

    @Override
    protected JComponent init() {
        inputField = new JTextField();
        PlainDocument doc = (PlainDocument) inputField.getDocument();
        doc.setDocumentFilter(filter);
        resetImpl();
        return inputField;
    }

    protected static abstract class AbstractFilter extends DocumentFilter {
        @Override
        public final void insertString(FilterBypass fb, int offset, String string, AttributeSet attr)
                throws BadLocationException {

            Document doc = fb.getDocument();
            StringBuilder sb = new StringBuilder();
            sb.append(doc.getText(0, doc.getLength()));
            sb.insert(offset, string);

            if (test(sb.toString())) {
                super.insertString(fb, offset, string, attr);
            }
        }

        @Override
        public final void replace(FilterBypass fb, int offset, int length, String text, AttributeSet attrs)
                throws BadLocationException {

            Document doc = fb.getDocument();
            StringBuilder sb = new StringBuilder();
            sb.append(doc.getText(0, doc.getLength()));
            sb.replace(offset, offset + length, text);

            if (test(sb.toString())) {
                super.replace(fb, offset, length, text, attrs);
            }
        }

        @Override
        public final void remove(FilterBypass fb, int offset, int length) throws BadLocationException {
            Document doc = fb.getDocument();
            StringBuilder sb = new StringBuilder();
            sb.append(doc.getText(0, doc.getLength()));
            sb.delete(offset, offset + length);

            if (test(sb.toString())) {
                super.remove(fb, offset, length);
            }
        }

        protected abstract boolean test(String text);
    }
}