KeyBinding.java

package org.herac.tuxguitar.gui.system.keybindings;

import java.util.StringTokenizer;

public class KeyBinding {
	
	public static final String MASK_SEPARATOR = "+";
	
	private int mask;
	private int key;
	
	public KeyBinding(int key,int mask){
		this.key = key;
		this.mask = mask;
	}
	
	public KeyBinding(){
		this(0,0);
	}
	
	public int getKey() {
		return this.key;
	}
	
	public void setKey(int key) {
		this.key = key;
	}
	
	public int getMask() {
		return this.mask;
	}
	
	public void setMask(int mask) {
		this.mask = mask;
	}
	
	private String getSpecialKey(){
		for(int i = 0; i < KeyConversion.relations.length; i++){
			if (this.key == KeyConversion.relations[i].getCode()){
				return KeyConversion.relations[i].getKey();
			}
		}
		
		return null;
	}
	
	private String getSpecialMask(){
		String mask = new String();
		for(int i = 0; i < KeyConversion.relations.length; i++){
			if ( (this.mask & KeyConversion.relations[i].getCode()) == KeyConversion.relations[i].getCode()){
				mask += KeyConversion.relations[i].getKey() + MASK_SEPARATOR;
			}
		}
		return mask;
	}
	
	public boolean isSameAs(KeyBinding kb){
		if( kb != null ){
			return (this.key == kb.key && this.mask == kb.mask);
		}
		return false;
	}
	
	public String toString(){
		String mask = getSpecialMask();
		String key = getSpecialKey();
		return (key != null ? (mask + key) : (mask + (char)this.key) );
	}
	
	public Object clone(){
		return new KeyBinding(getKey(),getMask());
	}
	
	public static KeyBinding parse(String keyString){
		KeyBinding keybinding = new KeyBinding();
		
		// process mask
		int maskCode=0;
		String key = keyString;
		if (keyString.indexOf(MASK_SEPARATOR)!= -1){
			StringTokenizer st = new StringTokenizer(keyString,MASK_SEPARATOR);
			while(st.hasMoreTokens()){
				String token = st.nextToken();
				
				// only process if this is not the last token
				if (st.hasMoreTokens()){
					// add the mask
					maskCode |= getSpecialCode(token);
				}
				else {
					key = token;
				}
			}
		}
		
		keybinding.setMask(maskCode);
		
		// process key
		int keycode = getSpecialCode(key);
		if (keycode == 0)
			keycode = getKeyCode(key);
		
		keybinding.setKey(keycode);
		
		return keybinding;
	}
	
	private static int getKeyCode(String key){
		return key.charAt(0);
	}
	
	private static int getSpecialCode(String key){
		for(int i = 0; i < KeyConversion.relations.length; i++){
			if (KeyConversion.relations[i].getKey().equals(key)){
				return KeyConversion.relations[i].getCode();
			}
		}
		return 0;
	}
	
}

class KeyConversion {
	
	protected static final KeyConversion[] relations = new KeyConversion[]{
		new KeyConversion("F1",KeyBindingConstants.F1),
		new KeyConversion("F2",KeyBindingConstants.F2),
		new KeyConversion("F3",KeyBindingConstants.F3),
		new KeyConversion("F4",KeyBindingConstants.F4),
		new KeyConversion("F5",KeyBindingConstants.F5),
		new KeyConversion("F6",KeyBindingConstants.F6),
		new KeyConversion("F7",KeyBindingConstants.F7),
		new KeyConversion("F8",KeyBindingConstants.F8),
		new KeyConversion("F9",KeyBindingConstants.F9),
		new KeyConversion("F10",KeyBindingConstants.F10),
		new KeyConversion("F11",KeyBindingConstants.F11),
		new KeyConversion("F12",KeyBindingConstants.F12),
		new KeyConversion("Esc",KeyBindingConstants.ESC),
		new KeyConversion("Pause",KeyBindingConstants.PAUSE),
		new KeyConversion("Print",KeyBindingConstants.PRINT_SCREEN),
		new KeyConversion("Ins",KeyBindingConstants.INSERT),
		new KeyConversion("Del",KeyBindingConstants.DELETE),
		new KeyConversion("Home",KeyBindingConstants.HOME),
		new KeyConversion("PgUp",KeyBindingConstants.PAGE_UP),
		new KeyConversion("PgDn",KeyBindingConstants.PAGE_DOWN),
		new KeyConversion("End",KeyBindingConstants.END),
		new KeyConversion("Up",KeyBindingConstants.UP),
		new KeyConversion("Down",KeyBindingConstants.DOWN),
		new KeyConversion("Left",KeyBindingConstants.LEFT),
		new KeyConversion("Right",KeyBindingConstants.RIGHT),
		new KeyConversion("Control",KeyBindingConstants.CONTROL),
		new KeyConversion("Shift",KeyBindingConstants.SHIFT),
		new KeyConversion("Alt",KeyBindingConstants.ALT),
		new KeyConversion("Tab",KeyBindingConstants.TAB),
		new KeyConversion("Space",KeyBindingConstants.SPACE),
		new KeyConversion("Enter",KeyBindingConstants.ENTER),
		new KeyConversion("*",KeyBindingConstants.KEYPAD_MULTIPLY),
		new KeyConversion("/",KeyBindingConstants.KEYPAD_DIVIDE),
		new KeyConversion(".",KeyBindingConstants.KEYPAD_DECIMAL),
	};
	
	private String key;
	private int code;
	
	private KeyConversion(String key,int code){
		this.key = key;
		this.code = code;
	}
	
	public String getKey(){
		return this.key;
	}
	
	public int getCode(){
		return this.code;
	}
}