LineEditorImpl.java

/*
 * $Id: LineEditorImpl.java 535 2008-02-19 06:02:50Z weiju $
 * 
 * Created on 2005/11/07
 * Copyright 2005-2008 by Wei-ju Wu
 * This file is part of The Z-machine Preservation Project (ZMPP).
 *
 * ZMPP is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ZMPP 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 General Public License
 * along with ZMPP.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.zmpp.swingui;

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.util.LinkedList;
import java.util.List;

import org.zmpp.encoding.ZsciiEncoding;
import org.zmpp.vm.StoryFileHeader;

public class LineEditorImpl implements LineEditor, KeyListener, MouseListener,
        MouseMotionListener {

    private boolean inputmode;
    private List<Character> editbuffer;
    private StoryFileHeader fileheader;
    private ZsciiEncoding encoding;

    private MouseEvent lastMouseEvent;

    public LineEditorImpl(StoryFileHeader fileheader, ZsciiEncoding encoding) {

        this.fileheader = fileheader;
        this.encoding = encoding;
        editbuffer = new LinkedList<Character>();
    }

    public void setInputMode(boolean flag, boolean flushbuffer) {

        synchronized (editbuffer) {

            inputmode = flag;
            if (flushbuffer) {
                editbuffer.clear();
            }
            editbuffer.notifyAll();
        }
    }

    public void cancelInput() {

        synchronized (editbuffer) {

            editbuffer.add(ZsciiEncoding.NULL);
            inputmode = false;
            editbuffer.notifyAll();
        }
    }

    public char nextZsciiChar() {

        char zsciiChar = 0;
        synchronized (editbuffer) {

            while (editbuffer.size() == 0) {

                try {

                    editbuffer.wait();

                } catch (Exception ex) {
                }
            }
            zsciiChar = editbuffer.remove(0);
            editbuffer.notifyAll();
        }
        return zsciiChar;
    }

    public boolean isInputMode() {

        synchronized (editbuffer) {
            return inputmode;
        }
    }

    /**
     * {@inheritDoc}
     */
    public MouseEvent getLastMouseEvent() {

        return lastMouseEvent;
    }

    public void keyPressed(KeyEvent e) {

        switch (e.getKeyCode()) {
            case KeyEvent.VK_BACK_SPACE:
            case KeyEvent.VK_DELETE:
                addToBuffer(ZsciiEncoding.DELETE);
                break;
            case KeyEvent.VK_SPACE:
                addToBuffer(' ');
                break;
        }
    }

    public void keyTyped(KeyEvent e) {

        char c = e.getKeyChar();

        if (encoding.isConvertableToZscii(c)
                && !handledInKeyPressed(c)) {

            addToBuffer(encoding.getZsciiChar(c));
        }
    }

    public void keyReleased(KeyEvent e) {

        switch (e.getKeyCode()) {
            case KeyEvent.VK_UP:
                addToBuffer(ZsciiEncoding.CURSOR_UP);
                break;
            case KeyEvent.VK_DOWN:
                addToBuffer(ZsciiEncoding.CURSOR_DOWN);
                break;
            case KeyEvent.VK_LEFT:
                addToBuffer(ZsciiEncoding.CURSOR_LEFT);
                break;
            case KeyEvent.VK_RIGHT:
                addToBuffer(ZsciiEncoding.CURSOR_RIGHT);
                break;
            case KeyEvent.VK_ESCAPE:
                addToBuffer(ZsciiEncoding.ESCAPE);
                break;
        }
    }

    private void addToBuffer(char zsciiChar) {

        if (isInputMode()) {

            synchronized (editbuffer) {

                editbuffer.add(zsciiChar);
                editbuffer.notifyAll();
            }
        }
    }

    private boolean handledInKeyPressed(char c) {

        return c == ' ' || c == KeyEvent.VK_BACK_SPACE || c == KeyEvent.VK_DELETE;
    }

    public void mouseClicked(MouseEvent e) {

    //System.out.printf("mouseClicked(),  use mouse: %b, x: %d y: %d\n", useMouse(),
        //    e.getX(), e.getY());
        // Only if mouse is used
        if (useMouse()) {

            fileheader.setMouseCoordinates(e.getX() + 1, e.getY() + 1);

            // Store single clicks and double clicks with different codes
            addToBuffer(((e.getClickCount() == 1)
                    ? ZsciiEncoding.MOUSE_SINGLE_CLICK
                    : ZsciiEncoding.MOUSE_DOUBLE_CLICK));
        }
        lastMouseEvent = e;
    }

    /**
     * Returns true if the game should recognize the mouse.
     *
     * @return the mouse
     */
    private boolean useMouse() {

        return fileheader.isEnabled(StoryFileHeader.Attribute.USE_MOUSE)
                || fileheader.getVersion() == 6;
    }

    public void mouseEntered(MouseEvent e) {

        lastMouseEvent = e;
    }

    public void mouseExited(MouseEvent e) {

        lastMouseEvent = e;
    }

    public void mousePressed(MouseEvent e) {

        lastMouseEvent = e;
    }

    public void mouseReleased(MouseEvent e) {

        lastMouseEvent = e;
    }

    public void mouseMoved(MouseEvent e) {

        lastMouseEvent = e;
    }

    public void mouseDragged(MouseEvent e) {

        lastMouseEvent = e;
    }
}