ConsoleHost.java

/*
 *  This file is part of the Haven & Hearth game client.
 *  Copyright (C) 2009 Fredrik Tolf <fredrik@dolda2000.com>, and
 *                     Björn Johannessen <johannessen.bjorn@gmail.com>
 *
 *  Redistribution and/or modification of this file is subject to the
 *  terms of the GNU Lesser General Public License, version 3, as
 *  published by the Free Software Foundation.
 *
 *  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.
 *
 *  Other parts of this source tree adhere to other copying
 *  rights. Please see the file `COPYING' in the root directory of the
 *  source tree for details.
 *
 *  A copy the GNU Lesser General Public License is distributed along
 *  with the source tree of which this file is a part in the file
 *  `doc/LPGL-3'. If it is missing for any reason, please see the Free
 *  Software Foundation's website at <http://www.fsf.org/>, or write
 *  to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 *  Boston, MA 02111-1307 USA
 */

package haven;

import java.util.*;
import java.awt.event.KeyEvent;

public abstract class ConsoleHost extends Widget {
    public static Text.Foundry cmdfoundry = new Text.Foundry(new java.awt.Font("Monospaced", java.awt.Font.BOLD, 14), new java.awt.Color(255, 0, 192));
    LineEdit cmdline = null;
    private Text.Line cmdtext = null;
    private String cmdtextf = null;
    private List<String> history = new ArrayList<String>();
    private int hpos = history.size();
    private String hcurrent;
    
    private class CommandLine extends LineEdit {
	private CommandLine() {
	    super();
	}
	
	private CommandLine(String line) {
	    super(line);
	}

	private void cancel() {
	    cmdline = null;
	    ui.grabkeys(null);
	}
	
	protected void done(String line) {
	    history.add(line);
	    try {
		ui.cons.run(line);
	    } catch(Exception e) {
		String msg = e.getMessage();
		if(msg == null)
		    msg = e.toString();
		ui.cons.out.println(msg);
		error(msg);
	    }
	    cancel();
	}
	
	public boolean key(char c, int code, int mod) {
	    if(c == 27) {
		cancel();
	    } else if((c == 8) && (mod == 0) && (line.length() == 0) && (point == 0)) {
		cancel();
	    } else if(code == KeyEvent.VK_UP) {
		if(hpos > 0) {
		    if(hpos == history.size())
			hcurrent = line;
		    cmdline = new CommandLine(history.get(--hpos));
		}
	    } else if(code == KeyEvent.VK_DOWN) {
		if(hpos < history.size()) {
		    if(++hpos == history.size())
			cmdline = new CommandLine(hcurrent);
		    else
			cmdline = new CommandLine(history.get(hpos));
		}
	    } else {
		return(super.key(c, code, mod));
	    }
	    return(true);
	}
    }

    public ConsoleHost(Coord c, Coord sz, Widget parent) {
	super(c, sz, parent);
    }
    
    public ConsoleHost(UI ui, Coord c, Coord sz) {
	super(ui, c, sz);
    }
    
    public void drawcmd(GOut g, Coord c) {
	if(cmdline != null) {
	    if((cmdtext == null) || (cmdtextf != cmdline.line))
		cmdtext = cmdfoundry.render(":" + (cmdtextf = cmdline.line));
	    g.image(cmdtext.tex(), c);
	    int lx = cmdtext.advance(cmdline.point + 1);
	    g.line(c.add(lx + 1, 2), c.add(lx + 1, 14), 1);
	}
    }
    
    public void entercmd() {
	ui.grabkeys(this);
	hpos = history.size();
	cmdline = new CommandLine();
    }

    public boolean type(char ch, KeyEvent ev) {
	if(cmdline == null) {
	    return(super.type(ch, ev));
	} else {
	    cmdline.key(ev);
	    return(true);
	}
    }
    
    public boolean keydown(KeyEvent ev) {
	if(cmdline != null) {
	    cmdline.key(ev);
	    return(true);
	}
	return(super.keydown(ev));
    }
    
    public abstract void error(String msg);
}