/*
 * Jexer - Java Text User Interface
 *
 * License: LGPLv3 or later
 *
 * This module is licensed under the GNU Lesser General Public License
 * Version 3.  Please see the file "COPYING" in this directory for more
 * information about the GNU Lesser General Public License Version 3.
 *
 *     Copyright (C) 2015  Kevin Lamonte
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, see
 * http://www.gnu.org/licenses/, or write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 * @author Kevin Lamonte [kevin.lamonte@gmail.com]
 * @version 1
 */
package jexer;

import jexer.bits.CellAttributes;
import jexer.bits.GraphicsChars;

/**
 * TField implements an editable text field.
 */
public final class TPasswordField extends TField {

    /**
     * Public constructor.
     *
     * @param parent parent widget
     * @param x column relative to parent
     * @param y row relative to parent
     * @param width visible text width
     * @param fixed if true, the text cannot exceed the display width
     */
    public TPasswordField(final TWidget parent, final int x, final int y,
        final int width, final boolean fixed) {

        this(parent, x, y, width, fixed, "", null, null);
    }

    /**
     * Public constructor.
     *
     * @param parent parent widget
     * @param x column relative to parent
     * @param y row relative to parent
     * @param width visible text width
     * @param fixed if true, the text cannot exceed the display width
     * @param text initial text, default is empty string
     */
    public TPasswordField(final TWidget parent, final int x, final int y,
        final int width, final boolean fixed, final String text) {

        this(parent, x, y, width, fixed, text, null, null);
    }

    /**
     * Public constructor.
     *
     * @param parent parent widget
     * @param x column relative to parent
     * @param y row relative to parent
     * @param width visible text width
     * @param fixed if true, the text cannot exceed the display width
     * @param text initial text, default is empty string
     * @param enterAction function to call when enter key is pressed
     * @param updateAction function to call when the text is updated
     */
    public TPasswordField(final TWidget parent, final int x, final int y,
        final int width, final boolean fixed, final String text,
        final TAction enterAction, final TAction updateAction) {

        // Set parent and window
        super(parent, x, y, width, fixed, text, enterAction, updateAction);
    }

    /**
     * Draw the text field.
     */
    @Override
    public void draw() {
        CellAttributes fieldColor;

        boolean showStars = false;
        if (isAbsoluteActive()) {
            fieldColor = getTheme().getColor("tfield.active");
        } else {
            fieldColor = getTheme().getColor("tfield.inactive");
            showStars = true;
        }

        int end = windowStart + getWidth();
        if (end > text.length()) {
            end = text.length();
        }

        getScreen().hLineXY(0, 0, getWidth(), GraphicsChars.HATCH, fieldColor);
        if (showStars) {
            getScreen().hLineXY(0, 0, getWidth() - 2, '*',
                fieldColor);
        } else {
            getScreen().putStringXY(0, 0, text.substring(windowStart, end),
                fieldColor);
        }

        // Fix the cursor, it will be rendered by TApplication.drawAll().
        updateCursor();
    }

}