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+/*************************************************************************
+ *
+ * $RCSfile: AccessibleTextImpl.java,v $
+ *
+ * $Revision: 1.1 $
+ *
+ * last change: $Author: obr $ $Date: 2002-10-01 07:16:39 $
+ *
+ * The Contents of this file are made available subject to the terms of
+ * either of the following licenses
+ *
+ * - GNU Lesser General Public License Version 2.1
+ * - Sun Industry Standards Source License Version 1.1
+ *
+ * Sun Microsystems Inc., October, 2000
+ *
+ * GNU Lesser General Public License Version 2.1
+ * =============================================
+ * Copyright 2000 by Sun Microsystems, Inc.
+ * 901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software Foundation.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ *
+ * Sun Industry Standards Source License Version 1.1
+ * =================================================
+ * The contents of this file are subject to the Sun Industry Standards
+ * Source License Version 1.1 (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.openoffice.org/license.html.
+ *
+ * Software provided under this License is provided on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ * See the License for the specific provisions governing your rights and
+ * obligations concerning the Software.
+ *
+ * The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ * Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ * All Rights Reserved.
+ *
+ * Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+package org.openoffice.java.accessibility;
+
+import java.text.BreakIterator;
+import java.util.Locale;
+import javax.accessibility.AccessibleContext;
+import javax.accessibility.AccessibleComponent;
+import javax.accessibility.AccessibleText;
+import javax.swing.text.SimpleAttributeSet;
+import javax.swing.text.StyleConstants;
+
+import org.openoffice.accessibility.internal.*;
+
+import com.sun.star.awt.Point;
+import com.sun.star.awt.Rectangle;
+import com.sun.star.uno.UnoRuntime;
+
+import drafts.com.sun.star.accessibility.XAccessibleText;
+
+/** This class mapps the methods of a AccessibleText the corresponding UNO
+ XAccessibleText methods with two exceptions: because the gnome java
+ accessbridge relies on the behavior of the java word iterator that
+ handles punctuation characters as word (see java docu for details),
+ for objects not implementing AccessibleEditableText, the iteration
+ is done locally. Also the character attributes are calculated through
+ the AccessibleContext interface ..
+*/
+public class AccessibleTextImpl implements javax.accessibility.AccessibleText {
+ XAccessibleText unoAccessibleText;
+
+ AccessibleContext context;
+ String text;
+
+ public AccessibleTextImpl(XAccessibleText xText, AccessibleContext ac) {
+ unoAccessibleText = xText;
+ context = ac;
+
+ if( unoAccessibleText != null ) {
+ text = unoAccessibleText.getText();
+ }
+ }
+
+ public void update() {
+ if( unoAccessibleText != null ) {
+ text = unoAccessibleText.getText();
+ }
+ }
+
+ /*
+ * AccessibleText
+ */
+
+ /** Returns the string after a given index */
+ public java.lang.String getAfterIndex(int part, int index) {
+ BreakIterator bi;
+ int start;
+ int end;
+
+ switch (part) {
+ case AccessibleText.CHARACTER:
+ start = index = 1;
+ end = index + 2;
+ break;
+ case AccessibleText.WORD:
+ bi = BreakIterator.getWordInstance(context.getLocale());
+ bi.setText(text);
+ start = bi.following(index);
+ end = bi.next();
+ break;
+ case AccessibleText.SENTENCE:
+ bi = BreakIterator.getSentenceInstance(context.getLocale());
+ bi.setText(text);
+ start = bi.following(index);
+ end = bi.next();
+ break;
+ default:
+ throw new IllegalArgumentException();
+ }
+
+ // Ensure start is in valid range
+ if( start < 0 ) {
+ start = 0;
+ }
+
+ // Ensure end is in valid range
+ if( end > text.length() ) {
+ end = text.length();
+ }
+
+ return text.substring(start, end);
+ }
+
+ /** Returns the zero-based offset of the caret */
+ public int getCaretPosition() {
+ // A fixed text does not really have a caret
+ return -1;
+ }
+
+ /** Returns the start offset within the selected text */
+ public int getSelectionStart() {
+ // In fixed text nothing can be selected, so return the caret position as specified
+ // in AccessibleText docu.
+ return getCaretPosition();
+ }
+
+ /** Returns the AttributSet for a given character at a given index */
+ public javax.swing.text.AttributeSet getCharacterAttribute(int index) {
+ if( index > 0 && index < getCharCount() ) {
+ SimpleAttributeSet as = new SimpleAttributeSet();
+ AccessibleComponent ac = context.getAccessibleComponent();
+
+ // Fixed text has always the default colors
+ StyleConstants.setBackground(as, ac.getBackground());
+ StyleConstants.setForeground(as, ac.getForeground());
+
+ // Retrieve the information by querying the UI font
+ java.awt.Font f = ac.getFont();
+ if(f != null) {
+ StyleConstants.setFontFamily(as, f.getFamily());
+ StyleConstants.setFontSize(as, f.getSize());
+ StyleConstants.setBold(as, f.isBold());
+ StyleConstants.setItalic(as, f.isItalic());
+ }
+
+ // Retrieve the real character attributes from the live object
+ // StyleConstants.setUnderline(as, 0 != (attributes & CharacterAttributes.UNDERLINE));
+
+ return as;
+ }
+
+ return null;
+ }
+
+ /** Given a point in local ccordinates, return the zero-based index of the character under that point */
+ public int getIndexAtPoint(java.awt.Point point) {
+ int ret = -1;
+
+ if( unoAccessibleText != null ) {
+ ret = unoAccessibleText.getIndexAtPoint(new Point( point.x, point.y ));
+ }
+
+ return ret;
+ }
+
+ /** Returns the end offset within the selected text */
+ public int getSelectionEnd() {
+ // In fixed text nothing can be selected, so return the caret position as specified
+ // in AccessibleText docu.
+ return getCaretPosition();
+ }
+
+ /** Returns the string before a given index */
+ public java.lang.String getBeforeIndex(int part, int index) {
+ BreakIterator bi;
+ int start;
+ int end;
+
+ switch (part) {
+ case AccessibleText.CHARACTER:
+ start = index - 1;
+ end = index;
+ break;
+ case AccessibleText.WORD:
+ bi = BreakIterator.getWordInstance(context.getLocale());
+ bi.setText(text);
+ end = bi.preceding(index);
+ start = bi.previous();
+ break;
+ case AccessibleText.SENTENCE:
+ bi = BreakIterator.getSentenceInstance(context.getLocale());
+ bi.setText(text);
+ end = bi.preceding(index);
+ start = bi.previous();
+ break;
+ default:
+ throw new IllegalArgumentException();
+ }
+
+ // Ensure start is in valid range
+ if( start < 0 ) {
+ start = 0;
+ }
+
+ // Ensure end is in valid range
+ if( end > text.length() ) {
+ end = text.length();
+ }
+
+ return text.substring(start, end);
+ }
+
+ /** Returns the string at a given index */
+ public java.lang.String getAtIndex(int part, int index) {
+ BreakIterator bi;
+ int start;
+ int end;
+
+ switch (part) {
+ case AccessibleText.CHARACTER:
+ start = index;
+ end = index + 1;
+ break;
+ case AccessibleText.WORD:
+ bi = BreakIterator.getWordInstance(context.getLocale());
+ bi.setText(text);
+ end = bi.following(index);
+ start = bi.previous();
+ break;
+ case AccessibleText.SENTENCE:
+ bi = BreakIterator.getSentenceInstance(context.getLocale());
+ bi.setText(text);
+ end = bi.following(index);
+ start = bi.previous();
+ break;
+ default:
+ throw new IllegalArgumentException();
+ }
+
+ // Ensure start is in valid range
+ if( start < 0 ) {
+ start = 0;
+ }
+
+ // Ensure end is in valid range
+ if( end > text.length() ) {
+ end = text.length();
+ }
+
+ return text.substring(start, end);
+ }
+
+ /** Returns the number of characters (valid indicies) */
+ public int getCharCount() {
+ return text.length();
+ }
+
+ /** Returns the portion of the text that is selected */
+ public java.lang.String getSelectedText() {
+ // Nothing selected
+ return null;
+ }
+
+ /** Determines the bounding box of the character at the given index into the string */
+ public java.awt.Rectangle getCharacterBounds(int index) {
+ try {
+ Rectangle unoRect = unoAccessibleText.getCharacterBounds(index);
+ return new java.awt.Rectangle(unoRect.X, unoRect.Y, unoRect.Width, unoRect.Height);
+ }
+
+ catch ( com.sun.star.lang.IndexOutOfBoundsException exception ) {
+ // FIXME: The java AccessBridge currently does not handle such exceptions gracefully
+// throw new IndexOutOfBoundsException( exception.getMessage() );
+ return null;
+ }
+
+ catch ( NullPointerException e ) {
+ return null;
+ }
+ }
+}
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