Initial revision
From-SVN: r102074
This commit is contained in:
Tom Tromey
parent
6f4434b39b
commit
f911ba985a
4557 changed files with 1000262 additions and 0 deletions
739
libjava/classpath/java/awt/TextComponent.java
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739
libjava/classpath/java/awt/TextComponent.java
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/* TextComponent.java -- Widgets for entering text
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Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt;
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import java.awt.event.TextEvent;
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import java.awt.event.TextListener;
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import java.awt.peer.TextComponentPeer;
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import java.io.Serializable;
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import java.text.BreakIterator;
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import java.util.EventListener;
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import javax.accessibility.Accessible;
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import javax.accessibility.AccessibleContext;
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import javax.accessibility.AccessibleRole;
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import javax.accessibility.AccessibleState;
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import javax.accessibility.AccessibleStateSet;
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import javax.accessibility.AccessibleText;
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import javax.swing.text.AttributeSet;
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/**
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* This class provides common functionality for widgets than
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* contain text.
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*
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* @author Aaron M. Renn (arenn@urbanophile.com)
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*/
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public class TextComponent extends Component
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implements Serializable, Accessible
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{
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/*
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* Static Variables
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*/
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// Constant for serialization
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private static final long serialVersionUID = -2214773872412987419L;
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/*
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* Instance Variables
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*/
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/**
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* @serial Indicates whether or not this component is editable.
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* This is package-private to avoid an accessor method.
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*/
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boolean editable;
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/**
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* @serial The starting position of the selected text region.
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* This is package-private to avoid an accessor method.
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*/
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int selectionStart;
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/**
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* @serial The ending position of the selected text region.
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* This is package-private to avoid an accessor method.
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*/
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int selectionEnd;
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/**
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* @serial The text in the component
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* This is package-private to avoid an accessor method.
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*/
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String text;
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/**
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* A list of listeners that will receive events from this object.
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*/
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protected transient TextListener textListener;
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protected class AccessibleAWTTextComponent
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extends AccessibleAWTComponent
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implements AccessibleText, TextListener
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{
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// Constructor
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// Adds a listener for tracking caret changes
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public AccessibleAWTTextComponent()
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{
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TextComponent.this.addTextListener(this);
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}
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public AccessibleRole getAccessibleRole()
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{
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return AccessibleRole.TEXT;
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}
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public AccessibleStateSet getAccessibleStateSet()
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{
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// TODO: Docs say PropertyChangeEvent will fire if this state changes.
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// That means that the event has to fire when editable changes.
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AccessibleStateSet ss = super.getAccessibleStateSet();
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if (editable)
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ss.add(AccessibleState.EDITABLE);
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return ss;
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}
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public AccessibleText getAccessibleText()
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{
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return this;
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}
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/* (non-Javadoc)
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* @see javax.accessibility.AccessibleText#getIndexAtPoint(java.awt.Point)
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*/
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public int getIndexAtPoint(Point point)
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{
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return TextComponent.this.getIndexAtPoint(point);
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}
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/* (non-Javadoc)
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* @see javax.accessibility.AccessibleText#getCharacterBounds(int)
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*/
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public Rectangle getCharacterBounds(int index)
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{
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return TextComponent.this.getCharacterBounds(index);
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}
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/* (non-Javadoc)
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* @see javax.accessibility.AccessibleText#getCharCount()
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*/
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public int getCharCount()
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{
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return text.length();
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}
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/* (non-Javadoc)
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* @see javax.accessibility.AccessibleText#getCaretPosition()
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*/
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public int getCaretPosition()
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{
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return TextComponent.this.getCaretPosition();
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}
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/* (non-Javadoc)
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* @see javax.accessibility.AccessibleText#getAtIndex(int, int)
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*/
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public String getAtIndex(int part, int index)
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{
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if (index < 0 || index >= text.length())
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return null;
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BreakIterator it = null;
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switch (part)
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{
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case CHARACTER:
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return text.substring(index, index + 1);
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case WORD:
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it = BreakIterator.getWordInstance();
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break;
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case SENTENCE:
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it = BreakIterator.getSentenceInstance();
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break;
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default:
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return null;
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}
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it.setText(text);
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int start = index;
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if (!it.isBoundary(index))
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start = it.preceding(index);
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int end = it.following(index);
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if (end == -1)
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return text.substring(index);
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else
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return text.substring(index, end);
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}
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/* (non-Javadoc)
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* @see javax.accessibility.AccessibleText#getAfterIndex(int, int)
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*/
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public String getAfterIndex(int part, int index) {
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if (index < 0 || index >= text.length())
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return null;
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BreakIterator it = null;
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switch (part)
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{
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case CHARACTER:
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return text.substring(index, index + 1);
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case WORD:
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it = BreakIterator.getWordInstance();
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break;
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case SENTENCE:
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it = BreakIterator.getSentenceInstance();
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break;
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default:
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return null;
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}
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it.setText(text);
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int start = index;
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if (!it.isBoundary(index))
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start = it.following(index);
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// Make sure there was a complete unit. I.e. if index is in the middle
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// of a word, return null if there is no word after the that one.
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if (start == -1)
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return null;
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int end = it.following(start);
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if (end == -1)
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return text.substring(index);
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else
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return text.substring(index, end);
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}
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/* (non-Javadoc)
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* @see javax.accessibility.AccessibleText#getBeforeIndex(int, int)
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*/
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public String getBeforeIndex(int part, int index)
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{
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if (index < 1 || index >= text.length())
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return null;
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BreakIterator it = null;
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switch (part)
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{
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case CHARACTER:
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return text.substring(index - 1, index);
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case WORD:
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it = BreakIterator.getWordInstance();
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break;
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case SENTENCE:
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it = BreakIterator.getSentenceInstance();
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break;
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default:
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return null;
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}
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it.setText(text);
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int end = index;
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if (!it.isBoundary(index))
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end = it.preceding(index);
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// Make sure there was a complete unit. I.e. if index is in the middle
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// of a word, return null if there is no word before that one.
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if (end == -1)
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return null;
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int start = it.preceding(end);
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if (start == -1)
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return text.substring(0, end);
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else
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return text.substring(start, end);
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}
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/* (non-Javadoc)
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* @see javax.accessibility.AccessibleText#getCharacterAttribute(int)
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*/
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public AttributeSet getCharacterAttribute(int index)
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{
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// FIXME: I suspect this really gets filled in by subclasses.
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return null;
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}
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/* (non-Javadoc)
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* @see javax.accessibility.AccessibleText#getSelectionStart()
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*/
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public int getSelectionStart() {
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// TODO Auto-generated method stub
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return selectionStart;
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}
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/* (non-Javadoc)
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* @see javax.accessibility.AccessibleText#getSelectionEnd()
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*/
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public int getSelectionEnd()
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{
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return selectionEnd;
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}
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/* (non-Javadoc)
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* @see javax.accessibility.AccessibleText#getSelectedText()
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*/
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public String getSelectedText()
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{
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if (selectionEnd - selectionStart > 0)
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return text.substring(selectionStart, selectionEnd);
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else
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return null;
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}
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/* (non-Javadoc)
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* @see java.awt.event.TextListener#textValueChanged(java.awt.event.TextEvent)
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*/
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public void textValueChanged(TextEvent event)
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{
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// TODO Auto-generated method stub
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}
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}
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/*************************************************************************/
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/*
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* Constructors
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*/
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TextComponent(String text)
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{
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this.text = text;
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this.editable = true;
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}
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/*************************************************************************/
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/*
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* Instance Methods
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*/
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/**
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* Returns the text in this component
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*
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* @return The text in this component.
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*/
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public synchronized String
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getText()
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{
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TextComponentPeer tcp = (TextComponentPeer)getPeer();
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if (tcp != null)
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text = tcp.getText();
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return(text);
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}
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/*************************************************************************/
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/**
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* Sets the text in this component to the specified string.
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*
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* @param text The new text for this component.
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*/
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public synchronized void
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setText(String text)
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{
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if (text == null)
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text = "";
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this.text = text;
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TextComponentPeer tcp = (TextComponentPeer)getPeer();
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if (tcp != null)
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tcp.setText(text);
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setCaretPosition(0);
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}
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/*************************************************************************/
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/**
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* Returns a string that contains the text that is currently selected.
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*
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* @return The currently selected text region.
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*/
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public synchronized String
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getSelectedText()
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{
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String alltext = getText();
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int start = getSelectionStart();
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int end = getSelectionEnd();
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return(alltext.substring(start, end));
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}
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/*************************************************************************/
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/**
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* Returns the starting position of the selected text region.
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* If the text is not selected then caret position is returned.
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*
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* @return The starting position of the selected text region.
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*/
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public synchronized int
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getSelectionStart()
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{
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TextComponentPeer tcp = (TextComponentPeer)getPeer();
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if (tcp != null)
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selectionStart = tcp.getSelectionStart();
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return(selectionStart);
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}
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/*************************************************************************/
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/**
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* Sets the starting position of the selected region to the
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* specified value. If the specified value is out of range, then it
|
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* will be silently changed to the nearest legal value.
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*
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* @param selectionStart The new start position for selected text.
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*/
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public synchronized void
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setSelectionStart(int selectionStart)
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{
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select(selectionStart, getSelectionEnd());
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}
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/*************************************************************************/
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/**
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* Returns the ending position of the selected text region.
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* If the text is not selected, then caret position is returned
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*
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* @return The ending position of the selected text region.
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*/
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public synchronized int
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getSelectionEnd()
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{
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TextComponentPeer tcp = (TextComponentPeer)getPeer();
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if (tcp != null)
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selectionEnd = tcp.getSelectionEnd();
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return(selectionEnd);
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}
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|
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/*************************************************************************/
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||||
|
||||
/**
|
||||
* Sets the ending position of the selected region to the
|
||||
* specified value. If the specified value is out of range, then it
|
||||
* will be silently changed to the nearest legal value.
|
||||
*
|
||||
* @param selectionEnd The new start position for selected text.
|
||||
*/
|
||||
public synchronized void
|
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setSelectionEnd(int selectionEnd)
|
||||
{
|
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select(getSelectionStart(), selectionEnd);
|
||||
}
|
||||
|
||||
/*************************************************************************/
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||||
|
||||
/**
|
||||
* This method sets the selected text range to the text between the
|
||||
* specified start and end positions. Illegal values for these
|
||||
* positions are silently fixed.
|
||||
*
|
||||
* @param selectionStart The new start position for the selected text.
|
||||
* @param selectionEnd The new end position for the selected text.
|
||||
*/
|
||||
public synchronized void
|
||||
select(int selectionStart, int selectionEnd)
|
||||
{
|
||||
if (selectionStart < 0)
|
||||
selectionStart = 0;
|
||||
|
||||
if (selectionStart > getText().length())
|
||||
selectionStart = text.length();
|
||||
|
||||
if (selectionEnd > text.length())
|
||||
selectionEnd = text.length();
|
||||
|
||||
if (selectionStart > getSelectionEnd())
|
||||
selectionStart = selectionEnd;
|
||||
|
||||
this.selectionStart = selectionStart;
|
||||
this.selectionEnd = selectionEnd;
|
||||
|
||||
TextComponentPeer tcp = (TextComponentPeer)getPeer();
|
||||
if (tcp != null)
|
||||
tcp.select(selectionStart, selectionEnd);
|
||||
}
|
||||
|
||||
/*************************************************************************/
|
||||
|
||||
/**
|
||||
* Selects all of the text in the component.
|
||||
*/
|
||||
public synchronized void
|
||||
selectAll()
|
||||
{
|
||||
select(0, getText().length());
|
||||
}
|
||||
|
||||
/*************************************************************************/
|
||||
|
||||
/**
|
||||
* Returns the current caret position in the text.
|
||||
*
|
||||
* @return The caret position in the text.
|
||||
*/
|
||||
public synchronized int
|
||||
getCaretPosition()
|
||||
{
|
||||
TextComponentPeer tcp = (TextComponentPeer)getPeer();
|
||||
if (tcp != null)
|
||||
return(tcp.getCaretPosition());
|
||||
else
|
||||
return(0);
|
||||
}
|
||||
|
||||
/*************************************************************************/
|
||||
|
||||
/**
|
||||
* Sets the caret position to the specified value.
|
||||
*
|
||||
* @param caretPosition The new caret position.
|
||||
*
|
||||
* @exception IllegalArgumentException If the value supplied for position
|
||||
* is less than zero.
|
||||
*
|
||||
* @since 1.1
|
||||
*/
|
||||
public synchronized void
|
||||
setCaretPosition(int caretPosition)
|
||||
{
|
||||
if (caretPosition < 0)
|
||||
throw new IllegalArgumentException ();
|
||||
|
||||
TextComponentPeer tcp = (TextComponentPeer)getPeer();
|
||||
if (tcp != null)
|
||||
tcp.setCaretPosition(caretPosition);
|
||||
}
|
||||
|
||||
/*************************************************************************/
|
||||
|
||||
/**
|
||||
* Tests whether or not this component's text can be edited.
|
||||
*
|
||||
* @return <code>true</code> if the text can be edited, <code>false</code>
|
||||
* otherwise.
|
||||
*/
|
||||
public boolean
|
||||
isEditable()
|
||||
{
|
||||
return(editable);
|
||||
}
|
||||
|
||||
/*************************************************************************/
|
||||
|
||||
/**
|
||||
* Sets whether or not this component's text can be edited.
|
||||
*
|
||||
* @param editable <code>true</code> to enable editing of the text,
|
||||
* <code>false</code> to disable it.
|
||||
*/
|
||||
public synchronized void
|
||||
setEditable(boolean editable)
|
||||
{
|
||||
this.editable = editable;
|
||||
|
||||
TextComponentPeer tcp = (TextComponentPeer)getPeer();
|
||||
if (tcp != null)
|
||||
tcp.setEditable(editable);
|
||||
}
|
||||
|
||||
/*************************************************************************/
|
||||
|
||||
/**
|
||||
* Notifies the component that it should destroy its native peer.
|
||||
*/
|
||||
public void
|
||||
removeNotify()
|
||||
{
|
||||
super.removeNotify();
|
||||
}
|
||||
|
||||
/*************************************************************************/
|
||||
|
||||
/**
|
||||
* Adds a new listener to the list of text listeners for this
|
||||
* component.
|
||||
*
|
||||
* @param listener The listener to be added.
|
||||
*/
|
||||
public synchronized void
|
||||
addTextListener(TextListener listener)
|
||||
{
|
||||
textListener = AWTEventMulticaster.add(textListener, listener);
|
||||
|
||||
enableEvents(AWTEvent.TEXT_EVENT_MASK);
|
||||
}
|
||||
|
||||
/*************************************************************************/
|
||||
|
||||
/**
|
||||
* Removes the specified listener from the list of listeners
|
||||
* for this component.
|
||||
*
|
||||
* @param listener The listener to remove.
|
||||
*/
|
||||
public synchronized void
|
||||
removeTextListener(TextListener listener)
|
||||
{
|
||||
textListener = AWTEventMulticaster.remove(textListener, listener);
|
||||
}
|
||||
|
||||
/*************************************************************************/
|
||||
|
||||
/**
|
||||
* Processes the specified event for this component. Text events are
|
||||
* processed by calling the <code>processTextEvent()</code> method.
|
||||
* All other events are passed to the superclass method.
|
||||
*
|
||||
* @param event The event to process.
|
||||
*/
|
||||
protected void
|
||||
processEvent(AWTEvent event)
|
||||
{
|
||||
if (event instanceof TextEvent)
|
||||
processTextEvent((TextEvent)event);
|
||||
else
|
||||
super.processEvent(event);
|
||||
}
|
||||
|
||||
/*************************************************************************/
|
||||
|
||||
/**
|
||||
* Processes the specified text event by dispatching it to any listeners
|
||||
* that are registered. Note that this method will only be called
|
||||
* if text event's are enabled. This will be true if there are any
|
||||
* registered listeners, or if the event has been specifically
|
||||
* enabled using <code>enableEvents()</code>.
|
||||
*
|
||||
* @param event The text event to process.
|
||||
*/
|
||||
protected void
|
||||
processTextEvent(TextEvent event)
|
||||
{
|
||||
if (textListener != null)
|
||||
textListener.textValueChanged(event);
|
||||
}
|
||||
|
||||
void
|
||||
dispatchEventImpl(AWTEvent e)
|
||||
{
|
||||
if (e.id <= TextEvent.TEXT_LAST
|
||||
&& e.id >= TextEvent.TEXT_FIRST
|
||||
&& (textListener != null
|
||||
|| (eventMask & AWTEvent.TEXT_EVENT_MASK) != 0))
|
||||
processEvent(e);
|
||||
else
|
||||
super.dispatchEventImpl(e);
|
||||
}
|
||||
|
||||
/*************************************************************************/
|
||||
|
||||
/**
|
||||
* Returns a debugging string.
|
||||
*
|
||||
* @return A debugging string.
|
||||
*/
|
||||
protected String
|
||||
paramString()
|
||||
{
|
||||
return(getClass().getName() + "(text=" + getText() + ")");
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns an array of all the objects currently registered as FooListeners
|
||||
* upon this <code>TextComponent</code>. FooListeners are registered using
|
||||
* the addFooListener method.
|
||||
*
|
||||
* @exception ClassCastException If listenerType doesn't specify a class or
|
||||
* interface that implements java.util.EventListener.
|
||||
*/
|
||||
public EventListener[] getListeners (Class listenerType)
|
||||
{
|
||||
if (listenerType == TextListener.class)
|
||||
return AWTEventMulticaster.getListeners (textListener, listenerType);
|
||||
|
||||
return super.getListeners (listenerType);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns all text listeners registered to this object.
|
||||
*/
|
||||
public TextListener[] getTextListeners ()
|
||||
{
|
||||
return (TextListener[]) getListeners (TextListener.class);
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets the AccessibleContext associated with this <code>TextComponent</code>.
|
||||
* The context is created, if necessary.
|
||||
*
|
||||
* @return the associated context
|
||||
*/
|
||||
public AccessibleContext getAccessibleContext()
|
||||
{
|
||||
/* Create the context if this is the first request */
|
||||
if (accessibleContext == null)
|
||||
accessibleContext = new AccessibleAWTTextComponent();
|
||||
return accessibleContext;
|
||||
}
|
||||
|
||||
|
||||
/*******************************/
|
||||
// Provide AccessibleAWTTextComponent access to several peer functions that
|
||||
// aren't publicly exposed. This is package-private to avoid an accessor
|
||||
// method.
|
||||
synchronized int
|
||||
getIndexAtPoint(Point p)
|
||||
{
|
||||
TextComponentPeer tcp = (TextComponentPeer)getPeer();
|
||||
if (tcp != null)
|
||||
return tcp.getIndexAtPoint(p.x, p.y);
|
||||
return -1;
|
||||
}
|
||||
|
||||
synchronized Rectangle
|
||||
getCharacterBounds(int i)
|
||||
{
|
||||
TextComponentPeer tcp = (TextComponentPeer)getPeer();
|
||||
if (tcp != null)
|
||||
return tcp.getCharacterBounds(i);
|
||||
return null;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
} // class TextComponent
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue