/*
 * SoapUI, Copyright (C) 2004-2016 SmartBear Software 
 *
 * Licensed under the EUPL, Version 1.1 or - as soon as they will be approved by the European Commission - subsequent 
 * versions of the EUPL (the "Licence"); 
 * You may not use this work except in compliance with the Licence. 
 * You may obtain a copy of the Licence at: 
 * 
 * http://ec.europa.eu/idabc/eupl 
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the Licence is 
 * distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 
 * express or implied. See the Licence for the specific language governing permissions and limitations 
 * under the Licence. 
 */

package com.eviware.soapui.support.components;

import com.eviware.soapui.SoapUI;
import com.jgoodies.forms.builder.ButtonBarBuilder;
import com.jgoodies.forms.layout.Sizes;

import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;

/**
 * A simple status bar for editors
 *
 * @author Ole.Matzura
 */

public class JEditorStatusBar extends JPanel implements CaretListener {
    private JLabel caretLabel;
    private JLabel infoLabel;
    private JEditorStatusBarTarget target;
    private JPanel statusPanel;

    public JEditorStatusBar() {
        this(null);
    }

    public JEditorStatusBar(JEditorStatusBarTarget target) {
        this.target = target;

        caretLabel = new JLabel();
        caretLabel.setPreferredSize(new Dimension(60, 16));

        infoLabel = new JLabel();
        infoLabel.setVisible(false);

        caretLabel.setBorder(BorderFactory.createCompoundBorder(
                BorderFactory.createMatteBorder(0, 1, 0, 0, Color.LIGHT_GRAY),
                BorderFactory.createMatteBorder(0, 1, 0, 0, Color.WHITE)));

        ButtonBarBuilder builder = new ButtonBarBuilder(this);
        builder.addGriddedGrowing(infoLabel);
        builder.addStrut(Sizes.pixel(2));

        statusPanel = new JPanel(new BorderLayout());
        statusPanel.setPreferredSize(new Dimension(60, 16));

        statusPanel.setBorder(BorderFactory.createCompoundBorder(
                BorderFactory.createMatteBorder(0, 1, 0, 0, Color.LIGHT_GRAY),
                BorderFactory.createMatteBorder(0, 1, 0, 0, Color.WHITE)));

        builder.addFixed(statusPanel);
        builder.addFixed(caretLabel);
        builder.getPanel();
    }

    public void addNotify() {
        super.addNotify();

        if (target != null) {
            target.addCaretListener(this);
        }
    }

    public void removeNotify() {
        super.removeNotify();

        if (target != null) {
            target.removeCaretListener(this);
        }
    }

    public void caretUpdate(CaretEvent e) {
        try {
            if (target == null) {
                caretLabel.setText("");
            } else {
                int offset = target.getCaretPosition();
                int line = target.getLineOfOffset(offset);
                int column = offset - target.getLineStartOffset(line);

                caretLabel.setText(" " + (line + 1) + " : " + (column + 1));
            }
        } catch (Exception e1) {
            SoapUI.logError(e1);
        }
    }

    public void setTarget(JEditorStatusBarTarget target) {
        if (this.target != null) {
            this.target.removeCaretListener(this);
        }

        this.target = target;
        this.target.addCaretListener(this);

        caretUpdate(null);
    }

    public void setInfo(String txt) {
        infoLabel.setText(txt);
        infoLabel.setVisible(txt != null);
    }

    public void setStatusComponent(JComponent statusComponent) {
        statusPanel.removeAll();
        statusPanel.add(statusComponent, BorderLayout.CENTER);
        statusPanel.revalidate();
    }

    /**
     * Target for caret-status
     *
     * @author Ole.Matzura
     */

    public interface JEditorStatusBarTarget {
        void addCaretListener(CaretListener listener);

        int getCaretPosition();

        void removeCaretListener(CaretListener listener);

        int getLineStartOffset(int line) throws Exception;

        int getLineOfOffset(int offset) throws Exception;

        ;
    }
}