list.java

kaffe是一个java虚拟机的源代码。里面包含了一些java例程和标准的java包。

	return ip.getBackground();
}

ClassProperties getClassProperties () {
	return ClassAnalyzer.analyzeAll( getClass(), true);
}

public Color getForeground () {
	// some anomaly, we forward colors to our ip, so we should return its colors
	// for consistencies sake
	return ip.getForeground();
}

public String getItem ( int index) {
	return (String)ip.rows.elementAt( index);
}

public int getItemCount () {
	return (countItems());
}

public synchronized String[] getItems () {
	String[] si = new String[ ip.rows.size() ];
	for ( int i=0; i<si.length; i++) {
		si[i] = (String)ip.rows.elementAt( i);
	}
	return si;
}

public int getRows () {
	return ip.rows.size();
}

public synchronized int getSelectedIndex () {
	return sel;
}

public synchronized int[] getSelectedIndexes () {
	int[] r;
	int   i, j, n;

	if ( multipleMode ) {
		if ( nSel == 0 )
			return new int[0];
		else if ( (nSel == 1) && (sel >= 0) ){
			r = new int[1];
			r[0] = sel;
			return r;
		}
		else {
			r = new int[nSel];
			n = Math.min( ip.rows.size(), multiSel.size());

			for ( i=0, j=0; i<n; i++ ) {
				if ( multiSel.get( i) ){
					r[j++] = i;
					if ( j == nSel )
						break;
				}
			}
			return r;
		}
	}
	else {
		if ( sel >= 0 ) {
			r = new int[1];
			r[0] = sel;
			return r;
		}
		else {
			return new int[0];
		}
	}
}

public synchronized String getSelectedItem () {
	if ( sel >= 0 ) {
		return (String) ip.rows.elementAt( sel);
	}
	else if ( nSel > 0 ) {
		int  n = Math.min( multiSel.size(), ip.rows.size());
		int  i;

		for ( i=0; i<n; i++ ){
			if ( multiSel.get(i) )
				return (String) ip.rows.elementAt( i);
		}
	}

	return null;
}

public synchronized String[] getSelectedItems () {
	// Not very nice to copy this from getSelectedIndexes, but some people
	// don't care how many items they have in their lists, and creating this
	// from a temporary int[] might produce a lot of garbage. Moreover, some
	// people just don't care for if they are in multiMode and use this
	// as a default (i.e. also in single mode)

	String[] r;
	int   i, j, n;

	if ( multipleMode ) {
		if ( nSel == 0 )
			return new String[0];
		else if ( (nSel == 1) && (sel >= 0) ){
			r = new String[1];
			r[0] = (String) ip.rows.elementAt( sel);
			return r;
		}
		else {
			r = new String[nSel];
			n = Math.min( ip.rows.size(), multiSel.size());

			for ( i=0, j=0; i<n; i++ ) {
				if ( multiSel.get( i) ){
					r[j++] = (String) ip.rows.elementAt( i);
					if ( j == nSel )
						break;
				}
			}
			return r;
		}
	}
	else {
		if ( sel >= 0 ) {
			r = new String[1];
			r[0] = (String) ip.rows.elementAt( sel);
			return r;
		}
		else {
			return new String[0];
		}
	}
}

public Object[] getSelectedObjects () {
	// Now what is this - we can't put arbitrary Objects in there, but we can get
	// them out? Seems like somebody finally discovered the potential of Lists,
	// but didn't finish on it.
	// Since we don't consider this the default access method (unfortunately), we
	// don't do the same expensive processing like in getSelectedItems

	int      i;
	int[]    selIdx = getSelectedIndexes();
	Object[] selObj = new Object[selIdx.length];

	for ( i=0; i<selIdx.length; i++ ) {
		selObj[i] = ip.rows.elementAt( selIdx[i]);
	}

	return selObj;
}

public int getVisibleIndex () {
	return ip.first;
}

void hPosChange () {
	ip.repaint();
}

public boolean isIndexSelected ( int index) {
	return (isSelected(index));
}

public boolean isMultipleMode () {
	return (allowsMultipleSelections());
}

/**
 * @deprecated
 */
public boolean isSelected ( int index ) {
	if ( sel == index )
		return true;

	if ( multipleMode )
		return multiSel.get( index);

	return false;
}

public void makeVisible ( int idx ) {
	ip.makeVisible( idx);
}

public Dimension minimumSize () {
	return minimumSize(0);
}

public Dimension minimumSize (int rows) {
	return preferredSize(rows);
}

void notifyAction () {
	String s = (sel >= 0) ? (String) ip.rows.elementAt( sel) : null;

	if ( (s != null) &&
	     ((aListener != null) || (eventMask & AWTEvent.ACTION_EVENT_MASK) != 0) ) {
		Toolkit.eventQueue.postEvent( ActionEvt.getEvent( this, ActionEvent.ACTION_PERFORMED, s, 0));
	}
}

void notifyItem ( Object item, int op) {
	if ( (iListener != null) ||
	     (eventMask & AWTEvent.ITEM_EVENT_MASK) != 0 ||
	     (flags & IS_OLD_EVENT) != 0 ){
		ItemEvt e = ItemEvt.getEvent( this, ItemEvent.ITEM_STATE_CHANGED, item, op);
		Toolkit.eventQueue.postEvent( e);
	}
}

public void paint ( Graphics g ) {
	// we know about our childs, we don't have to blank the background,
	// so let's speed up things a little
	g.paintChild( ip, false);

	if ( (ip.hScroll != null) && ((ip.hScroll.flags & IS_VISIBLE) != 0) )
		g.paintChild( ip.hScroll, true);
	if ( (ip.vScroll != null) && ((ip.vScroll.flags & IS_VISIBLE) != 0) )
		g.paintChild( ip.vScroll, true);
}

protected String paramString() {
	return super.paramString();
}

public Dimension preferredSize () {
	int rows = ip.rows.size();
	if ( rows < 5 )
		rows = 5;
	else if ( rows > 10 )
		rows = 10;
	return preferredSize( rows);
}

public Dimension preferredSize (int rows) {
	int h = rows * ip.rowHeight;
	int w = 25 * ip.fm.charWidth( 'x');
	return new Dimension( w, h);
}

void process ( ActionEvent e ) {
	if ( (aListener != null) || ((eventMask & AWTEvent.ACTION_EVENT_MASK) != 0) ){
		processEvent( e);
	}
}

void process ( ItemEvent e ) {
	if ( (iListener != null) || ((eventMask & AWTEvent.ITEM_EVENT_MASK) != 0) ){
		processEvent( e);
	}

	if ((flags & IS_OLD_EVENT) != 0) {
		postEvent (Event.getEvent( e));
	}
}

protected void processActionEvent( ActionEvent e) {
	if ( aListener != null ){
		aListener.actionPerformed( e);
	}
}

protected void processItemEvent( ItemEvent e) {
	if (iListener != null) {
		iListener.itemStateChanged( e);
	}
}

public synchronized void remove ( String item) {
	removeElement( ip.rows.indexOf( item));
}

public synchronized void remove ( int index) {
	removeElement( index);
}

public synchronized void removeActionListener ( ActionListener l) {
	aListener = AWTEventMulticaster.remove( aListener, l);
}

public synchronized void removeAll () {
	clear();
}

void removeElement ( int index) {
	try {
		deselectElement( index, false, true);
		ip.rows.removeElementAt( index);

		ip.updateScrolls();
		ip.repaintRows( index, ip.getVisibleRows() );
	}
	catch ( Exception e) {}
}

void removeHScroll () {
	//	remove( hScroll);
	ip.hScroll = null;
}

public synchronized void removeItemListener ( ItemListener l) {
	iListener = AWTEventMulticaster.remove( iListener, l);
}

public synchronized void repaintRow ( int idx) {
	ip.repaintItem( idx);
}

public synchronized void replaceItem ( String newValue, int index) {
	try {
		Object o = ip.rows.elementAt( index);
		ip.rows.setElementAt( newValue, index);
		ip.updateHScroll();
		ip.repaintRows( index, 1);
	}
	catch ( Exception e) {
	}
}

public void requestFocus () {
	ip.requestFocus();
}

public void reshape ( int x, int y, int w, int h ) {
	super.reshape( x, y, w, h);

	// there is no need for validation of compound IS_NATIVE_LIKES, they are no Containers
	// in JDK, so we automagically have to re-layout them
	ip.innerLayout();
	flags |= IS_VALID;
}

public void select ( int index ) {
	// It's unclear whether a user selection should fire an event of
	// not - but some code appears rely on event *NOT* being sent.
	selectEvent( index, false);
}

void selectEvent ( int index, boolean fire ) {
	if ( (index < 0) || (index > ip.rows.size() - 1) )
		return;

	if ( isIndexSelected( index) )
		return;

	if ( multipleMode ) {
		sel = index;
		multiSel.set( index);
		nSel++;
	}
	else if ( sel >= 0 ) {
		int oldSel = sel;
		sel = index;
		ip.repaintRows( oldSel, 1);
		if (fire) {
			notifyItem( new Integer( oldSel), ItemEvent.DESELECTED);
		}
	}
	else
		sel = index;

	ip.makeVisible( index);
	ip.repaintRows( index, 1);

	if (fire) {
		notifyItem( new Integer( index), ItemEvent.SELECTED);
	}
}

public void setBackground ( Color c) {
	// Ideally, we would just do a super.setBackground(), but that would give us
	// a strange look for the scrollbar backgrounds. If we just forward here, we also
	// have to resolve getBackground()

	//super.setBackground( c);
	ip.setBackground( c);
}

public void setEnabled ( boolean isEnabled ) {
	super.setEnabled( isEnabled);

	ip.setEnabled( isEnabled);
}

public void setFont ( Font fnt) {
	super.setFont( fnt);
	ip.setFont( fnt);
	ip.updateScrolls();
}

public void setForeground ( Color c) {
	//super.setForeground( c);
	ip.setForeground( c);
}

public synchronized void setMultipleMode ( boolean b) {
	setMultipleSelections(b);
}

/**
 * @deprecated
 */
public synchronized void setMultipleSelections ( boolean b ) {
	if ( multipleMode == b )
		return;

	if ( multipleMode ){
		multiSel = null;
		nSel = 0;

		multipleMode = false;
	}
	else {
		multiSel = new BitSet();
		nSel = 0;

		multipleMode = true;
	}
}

public void update ( Graphics g ) {
	paint( g); // no background blanking required
}

void vPosChange ( int dy) {
}
}