/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Evgeniya G. Maenkova
* @version $Revision$
*/
package javax.swing;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Rectangle;
import javax.accessibility.AccessibleContext;
import javax.accessibility.AccessibleState;
import javax.accessibility.AccessibleStateSet;
import javax.swing.text.AbstractDocument;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.JTextComponent;
import javax.swing.text.PlainDocument;
import org.apache.harmony.x.swing.StringConstants;
import org.apache.harmony.x.swing.internal.nls.Messages;
public class JTextArea extends JTextComponent {
protected class AccessibleJTextArea extends
JTextComponent.AccessibleJTextComponent {
/**
* Adds state AccessibleState.MULTI_LINE to super class states
*/
public AccessibleStateSet getAccessibleStateSet() {
AccessibleStateSet ass = super.getAccessibleStateSet();
ass.add(AccessibleState.MULTI_LINE);
return ass;
}
}
private static final String uiClassID = "TextAreaUI";
private int rows;
private int columns;
private boolean wrapWord;
private boolean wrapLine;
private int rowHeight;
private int columnsWidth;
private Integer tabSize;
public JTextArea(final Document doc, final String s, final int r,
final int c) {
super();
if (r < 0) {
throw new IllegalArgumentException(Messages.getString("swing.3C", r)); //$NON-NLS-1$
}
if (c < 0) {
throw new IllegalArgumentException(Messages.getString("swing.3D", c)); //$NON-NLS-1$
}
Document document = doc;
if (document == null) {
document = createDefaultModel();
}
setDocument(document);
if (s != null) {
try {
document.remove(0, document.getLength());
document.insertString(0, s, null);
} catch (final BadLocationException e) {
}
}
rows = r;
columns = c;
evaluate(getFont());
tabSize = (Integer) document.getProperty("tabSize");
}
public JTextArea(final Document doc) {
this(doc, null, 0, 0);
}
public JTextArea(final String s, final int r, final int c) {
this(null, s, r, c);
}
public JTextArea(final String s) {
this(null, s, 0, 0);
}
public JTextArea(final int r, final int c) {
this(null, null, r, c);
}
public JTextArea() {
this(null, null, 0, 0);
}
public synchronized void append(final String s) {
Document doc = getDocument();
if (doc == null || (s == null || s == "")) {
return;
}
try {
doc.insertString(doc.getLength(), s, null);
} catch (final BadLocationException e) {
}
}
private int checkLineCount(final int line) throws BadLocationException {
int count = getDocument().getDefaultRootElement().getElementCount();
if (line < 0) {
throw new BadLocationException(Messages.getString("swing.3E"), line); //$NON-NLS-1$
}
if (line >= count) {
throw new BadLocationException(Messages.getString("swing.3F"), line); //$NON-NLS-1$
}
return count;
}
protected Document createDefaultModel() {
return new PlainDocument();
}
/*
* Sets new columnsWidth and rowHeight
*/
private void evaluate(final Font f) {
if (f != null) {
FontMetrics fm = getFontMetrics(f);
rowHeight = fm.getHeight();
columnsWidth = fm.charWidth('m');
} else {
rowHeight = 0;
columnsWidth = 0;
}
}
public AccessibleContext getAccessibleContext() {
if (accessibleContext == null) {
accessibleContext = new AccessibleJTextArea();
}
return accessibleContext;
}
public int getColumns() {
return columns;
}
protected int getColumnWidth() {
return columnsWidth;
}
public int getLineCount() {
Document doc = getDocument();
int count = 0;
readLock(doc);
try {
count = doc.getDefaultRootElement().getElementCount();
} finally {
readUnlock(doc);
}
return count;
}
public int getLineEndOffset(final int line) throws BadLocationException {
Document doc = getDocument();
int end = doc.getLength();
int count = 0;
readLock(doc);
try {
count = checkLineCount(line);
end = doc.getDefaultRootElement().getElement(line).getEndOffset();
} finally {
readUnlock(doc);
}
return (line == count - 1) ? end - 1 : end;
}
public int getLineOfOffset(final int offset) throws BadLocationException {
Document doc = getDocument();
int length = doc.getLength();
if (offset < 0 || offset > length) {
throw new BadLocationException(Messages.getString("swing.40"), //$NON-NLS-1$
offset);
}
readLock(doc);
int index = 0;
try {
index = doc.getDefaultRootElement().getElementIndex(offset);
} finally {
readUnlock(doc);
}
return index;
}
public int getLineStartOffset(final int line) throws BadLocationException {
Document doc = getDocument();
readLock(doc);
int start = 0;
try {
checkLineCount(line);
start = doc.getDefaultRootElement().getElement(line)
.getStartOffset();
} finally {
readUnlock(doc);
}
return start;
}
public boolean getLineWrap() {
return wrapLine;
}
public Dimension getPreferredScrollableViewportSize() {
Dimension dim = getPreferredSize();
int width = (columns == 0) ? dim.width : columns * columnsWidth;
int height = (rows == 0) ? dim.height : rows * rowHeight;
return new Dimension(width, height);
}
public Dimension getPreferredSize() {
int width1 = columns * columnsWidth;
int height1 = rows * rowHeight;
Dimension dim2 = super.getPreferredSize();
int width2 = dim2.width;
int height2 = dim2.height;
return new Dimension(Math.max(width1, width2), Math.max(height1,
height2));
}
protected int getRowHeight() {
return rowHeight;
}
public int getRows() {
return rows;
}
public boolean getScrollableTracksViewportWidth() {
return super.getScrollableTracksViewportWidth() || wrapLine;
}
public int getScrollableUnitIncrement(final Rectangle r,
final int orientation, final int direction) {
if (orientation == SwingConstants.HORIZONTAL) {
return columnsWidth;
}
if (orientation == SwingConstants.VERTICAL) {
return rowHeight;
}
throw new IllegalArgumentException(Messages.getString("swing.41", orientation)); //$NON-NLS-1$
}
public int getTabSize() {
return tabSize.intValue();
}
public String getUIClassID() {
return uiClassID;
}
public boolean getWrapStyleWord() {
return wrapWord;
}
public synchronized void insert(final String s, final int pos) {
Document doc = getDocument();
if (doc == null || (s == null || s == "")) {
return;
}
int length = doc.getLength();
if (pos < 0 || pos > length) {
throw new IllegalArgumentException(Messages.getString("swing.42")); //$NON-NLS-1$
}
try {
doc.insertString(pos, s, null);
} catch (final BadLocationException e) {
}
}
/*
* The format of the string is based on 1.5 release behavior
* which can be revealed using the following code:
*
* Object obj = new JTextArea();
* System.out.println(obj.toString());
*/
protected String paramString() {
return super.paramString() + "," + "columns=" + getColumns() + ","
+ "columnWidth=" + getColumnWidth() + "," + "rows=" + getRows()
+ "," + "rowHeight=" + getRowHeight() + "," + "word="
+ getWrapStyleWord() + "," + "wrap=" + getLineWrap();
}
private void readLock(final Document doc) {
if (!(doc instanceof AbstractDocument)) {
return;
}
((AbstractDocument) doc).readLock();
}
private void readUnlock(final Document doc) {
if (!(doc instanceof AbstractDocument)) {
return;
}
((AbstractDocument) doc).readUnlock();
}
public synchronized void replaceRange(final String s, final int start,
final int end) {
Document doc = getDocument();
if (doc == null) {
return;
}
int length = doc.getLength();
if (start < 0 || end > length) {
throw new IllegalArgumentException(Messages.getString("swing.43")); //$NON-NLS-1$
}
if (start > end) {
throw new IllegalArgumentException(Messages.getString("swing.44")); //$NON-NLS-1$
}
try {
doc.remove(start, end - start);
if (s != null && s != "") {
doc.insertString(start, s, null);
}
} catch (final BadLocationException e) {
}
}
public void setColumns(final int c) {
if (c < 0) {
throw new IllegalArgumentException(Messages.getString("swing.45")); //$NON-NLS-1$
}
columns = c;
invalidate();
}
public void setFont(final Font f) {
super.setFont(f);
evaluate(f);
revalidate();
//Perhaps JComponent should do it
repaint();
}
public void setLineWrap(final boolean b) {
boolean old = wrapLine;
wrapLine = b;
firePropertyChange(StringConstants.TEXT_COMPONENT_LINE_WRAP_PROPERTY,
old, b);
}
public void setRows(final int r) {
if (r < 0) {
throw new IllegalArgumentException(Messages.getString("swing.46")); //$NON-NLS-1$
}
rows = r;
invalidate();
}
/**
* Sets document's property PlainDocument.tabSizeAttribute.
*/
public void setTabSize(final int size) {
Integer old = tabSize;
tabSize = new Integer(size);
Document doc = getDocument();
if (doc != null) {
doc.putProperty(PlainDocument.tabSizeAttribute, tabSize);
}
firePropertyChange(PlainDocument.tabSizeAttribute, old, tabSize);
}
public void setWrapStyleWord(final boolean b) {
boolean old = wrapWord;
wrapWord = b;
firePropertyChange(StringConstants
.TEXT_COMPONENT_WRAP_STYLE_WORD_PROPERTY,
old, b);
}
}