| /* |
| * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| package sun.lwawt; |
| |
| import java.awt.Component; |
| import java.awt.Cursor; |
| import java.awt.Dimension; |
| import java.awt.Point; |
| import java.awt.TextArea; |
| import java.awt.event.TextEvent; |
| import java.awt.peer.TextAreaPeer; |
| |
| import javax.swing.JScrollBar; |
| import javax.swing.JScrollPane; |
| import javax.swing.JTextArea; |
| import javax.swing.ScrollPaneConstants; |
| import javax.swing.text.Document; |
| import javax.swing.text.JTextComponent; |
| |
| final class LWTextAreaPeer |
| extends LWTextComponentPeer<TextArea, LWTextAreaPeer.ScrollableJTextArea> |
| implements TextAreaPeer { |
| |
| private static final int DEFAULT_COLUMNS = 60; |
| private static final int DEFAULT_ROWS = 10; |
| |
| LWTextAreaPeer(final TextArea target, |
| final PlatformComponent platformComponent) { |
| super(target, platformComponent); |
| } |
| |
| @Override |
| protected ScrollableJTextArea createDelegate() { |
| return new ScrollableJTextArea(); |
| } |
| |
| @Override |
| void initializeImpl() { |
| super.initializeImpl(); |
| final int visibility = getTarget().getScrollbarVisibility(); |
| synchronized (getDelegateLock()) { |
| setScrollBarVisibility(visibility); |
| } |
| } |
| |
| @Override |
| JTextComponent getTextComponent() { |
| return getDelegate().getView(); |
| } |
| |
| @Override |
| protected Cursor getCursor(final Point p) { |
| final boolean isContains; |
| synchronized (getDelegateLock()) { |
| isContains = getDelegate().getViewport().getBounds().contains(p); |
| } |
| return isContains ? super.getCursor(p) : null; |
| } |
| |
| @Override |
| protected Component getDelegateFocusOwner() { |
| return getTextComponent(); |
| } |
| |
| @Override |
| public Dimension getMinimumSize() { |
| return getMinimumSize(DEFAULT_ROWS, DEFAULT_COLUMNS); |
| } |
| |
| @Override |
| public Dimension getMinimumSize(final int rows, final int columns) { |
| return getPreferredSize(rows, columns); |
| } |
| |
| @Override |
| public Dimension getPreferredSize(final int rows, final int columns) { |
| final Dimension size = super.getPreferredSize(rows, columns); |
| synchronized (getDelegateLock()) { |
| final JScrollBar vbar = getDelegate().getVerticalScrollBar(); |
| final JScrollBar hbar = getDelegate().getHorizontalScrollBar(); |
| final int scrollbarW = vbar != null ? vbar.getWidth() : 0; |
| final int scrollbarH = hbar != null ? hbar.getHeight() : 0; |
| return new Dimension(size.width + scrollbarW, |
| size.height + scrollbarH); |
| } |
| } |
| |
| @Override |
| public void insert(final String text, final int pos) { |
| final ScrollableJTextArea pane = getDelegate(); |
| synchronized (getDelegateLock()) { |
| final JTextArea area = pane.getView(); |
| final boolean doScroll = pos >= area.getDocument().getLength() |
| && area.getDocument().getLength() != 0; |
| area.insert(text, pos); |
| revalidate(); |
| if (doScroll) { |
| final JScrollBar vbar = pane.getVerticalScrollBar(); |
| if (vbar != null) { |
| vbar.setValue(vbar.getMaximum() - vbar.getVisibleAmount()); |
| } |
| } |
| } |
| repaintPeer(); |
| } |
| |
| @Override |
| public void setText(final String l) { |
| // Please note that we do not want to post an event |
| // if TextArea.setText() replaces an empty text by an empty text, |
| // that is, if component's text remains unchanged. |
| if (!l.isEmpty() || getTextComponent().getDocument().getLength() != 0) { |
| super.setText(l); |
| } |
| } |
| |
| @Override |
| public void replaceRange(final String text, final int start, |
| final int end) { |
| synchronized (getDelegateLock()) { |
| // JTextArea.replaceRange() posts two different events. |
| // Since we make no differences between text events, |
| // the document listener has to be disabled while |
| // JTextArea.replaceRange() is called. |
| final Document document = getTextComponent().getDocument(); |
| document.removeDocumentListener(this); |
| getDelegate().getView().replaceRange(text, start, end); |
| revalidate(); |
| postEvent(new TextEvent(getTarget(), TextEvent.TEXT_VALUE_CHANGED)); |
| document.addDocumentListener(this); |
| } |
| repaintPeer(); |
| } |
| |
| private void setScrollBarVisibility(final int visibility) { |
| final ScrollableJTextArea pane = getDelegate(); |
| final JTextArea view = pane.getView(); |
| view.setLineWrap(false); |
| |
| switch (visibility) { |
| case TextArea.SCROLLBARS_NONE: |
| pane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER); |
| pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER); |
| view.setLineWrap(true); |
| break; |
| case TextArea.SCROLLBARS_VERTICAL_ONLY: |
| pane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER); |
| pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS); |
| view.setLineWrap(true); |
| break; |
| case TextArea.SCROLLBARS_HORIZONTAL_ONLY: |
| pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER); |
| pane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS); |
| break; |
| default: |
| pane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS); |
| pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS); |
| break; |
| } |
| } |
| |
| @SuppressWarnings("serial") |
| final class ScrollableJTextArea extends JScrollPane { |
| |
| ScrollableJTextArea() { |
| super(); |
| getViewport().setView(new JTextAreaDelegate()); |
| } |
| |
| public JTextArea getView() { |
| return (JTextArea) getViewport().getView(); |
| } |
| |
| @Override |
| public void setEnabled(final boolean enabled) { |
| getViewport().getView().setEnabled(enabled); |
| super.setEnabled(enabled); |
| } |
| |
| @SuppressWarnings("serial") |
| private final class JTextAreaDelegate extends JTextArea { |
| |
| // Empty non private constructor was added because access to this |
| // class shouldn't be emulated by a synthetic accessor method. |
| JTextAreaDelegate() { |
| super(); |
| } |
| |
| @Override |
| public void replaceSelection(String content) { |
| getDocument().removeDocumentListener(LWTextAreaPeer.this); |
| super.replaceSelection(content); |
| // post only one text event in this case |
| postTextEvent(); |
| getDocument().addDocumentListener(LWTextAreaPeer.this); |
| } |
| |
| @Override |
| public boolean hasFocus() { |
| return getTarget().hasFocus(); |
| } |
| |
| @Override |
| public Point getLocationOnScreen() { |
| return LWTextAreaPeer.this.getLocationOnScreen(); |
| } |
| } |
| } |
| } |