org.smallmind.swing.datatransfer.ClipboardManager Maven / Gradle / Ivy
/*
* Copyright (c) 2007 through 2024 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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 or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* .
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.swing.datatransfer;
import java.awt.Component;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.Transferable;
import java.awt.event.ActionEvent;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.util.HashMap;
import javax.swing.AbstractAction;
import javax.swing.Action;
public class ClipboardManager implements ClipboardOwner, FocusListener {
private static final Clipboard SYSTEM_CLIPBOARD = Toolkit.getDefaultToolkit().getSystemClipboard();
private final Action cutAction;
private final Action copyAction;
private final Action pasteAction;
private final HashMap listenerMap;
private Component selectedComponent;
public ClipboardManager () {
cutAction = new CutAction(this, "Cut");
copyAction = new CopyAction(this, "Copy");
pasteAction = new PasteAction(this, "Paste");
listenerMap = new HashMap();
}
public Action getCutAction () {
return cutAction;
}
public Action getCopyAction () {
return copyAction;
}
public Action getPasteAction () {
return pasteAction;
}
public synchronized void addClipboardListener (ClipboardListener clipboardListener, Component clipboardUser) {
clipboardUser.addFocusListener(this);
listenerMap.put(clipboardUser, clipboardListener);
}
public synchronized void removeClipboardListener (ClipboardListener clipboardListener, Component clipboardUser) {
clipboardUser.removeFocusListener(this);
listenerMap.remove(clipboardUser);
}
public void focusGained (FocusEvent focusEvent) {
selectedComponent = (Component)focusEvent.getSource();
}
public void focusLost (FocusEvent focusEvent) {
selectedComponent = null;
}
public void setContents (Transferable transferable) {
SYSTEM_CLIPBOARD.setContents(transferable, this);
}
public void lostOwnership (Clipboard clipboard, Transferable contents) {
}
public class CutAction extends AbstractAction {
private final ClipboardManager clipboardManager;
public CutAction (ClipboardManager clipboardManager, String name) {
super(name);
this.clipboardManager = clipboardManager;
}
public void actionPerformed (ActionEvent actionEvent) {
ClipboardEvent clipboardEvent;
if (selectedComponent != null) {
(listenerMap.get(selectedComponent)).cutAction(new ClipboardEvent(clipboardManager, selectedComponent));
}
}
}
public class CopyAction extends AbstractAction {
private final ClipboardManager clipboardManager;
public CopyAction (ClipboardManager clipboardManager, String name) {
super(name);
this.clipboardManager = clipboardManager;
}
public void actionPerformed (ActionEvent actionEvent) {
if (selectedComponent != null) {
(listenerMap.get(selectedComponent)).copyAction(new ClipboardEvent(clipboardManager, selectedComponent));
}
}
}
public class PasteAction extends AbstractAction {
private final ClipboardManager clipboardManager;
public PasteAction (ClipboardManager clipboardManager, String name) {
super(name);
this.clipboardManager = clipboardManager;
}
public void actionPerformed (ActionEvent actionEvent) {
Transferable transferable;
transferable = SYSTEM_CLIPBOARD.getContents(clipboardManager);
if (selectedComponent != null) {
(listenerMap.get(selectedComponent)).pasteAction(new ClipboardEvent(clipboardManager, selectedComponent, transferable));
}
}
}
}