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/*************************************************************************
*
* The Contents of this file are made available subject to the terms of
* the BSD license.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*************************************************************************/
import java.awt.Color;
import java.awt.Font;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import java.util.Vector;
import com.sun.star.accessibility.XAccessible;
import com.sun.star.accessibility.XAccessibleContext;
import com.sun.star.accessibility.XAccessibleComponent;
import com.sun.star.accessibility.XAccessibleStateSet;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.awt.Point;
import com.sun.star.awt.Size;
/** Display textual information for a given accessible object. This
includes the names of that object of its ancestors as well as some
information retrieved from the XAccessibleContext and
XAccessibleComponent interfaces.
*/
class TextualDisplay
extends JScrollPane
implements IAccessibleObjectDisplay
{
/** Create a new scroll pane that contains a text widget which display
information about given accessible objects.
*/
public TextualDisplay ()
{
// Create a text widget for displaying the text information...
maText = new JTextArea (80,10);
maText.setBackground (new Color (250,240,230));
maText.setFont (new Font ("Courier", Font.PLAIN, 11));
// ...and set-up the scroll pane to show this widget.
setViewportView (maText);
setVerticalScrollBarPolicy (JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
setHorizontalScrollBarPolicy (JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
}
/** Set the accessible object to display. Call this method e.g. when a
new object has been focused.
*/
public synchronized void setAccessibleObject (XAccessibleContext xContext)
{
// First clear the display area.
msTextContent = new String ();
if (xContext != null)
{
String sIndentation = showParents (xContext);
showContextInfo (xContext, sIndentation);
showComponentInfo (xContext, sIndentation);
}
maText.setText (msTextContent);
}
public synchronized void updateAccessibleObject (XAccessibleContext xContext)
{
setAccessibleObject (xContext);
}
/** Show some of the information available over the given object's
XAccessibleContext interface.
*/
private void showContextInfo (XAccessibleContext xContext, String sIndentation)
{
// Show the description.
msTextContent += sIndentation + "Description: "
+ xContext.getAccessibleDescription() + "\n";
showStates (xContext, sIndentation);
}
/** Show a list of all of the the given object's states. Use the
NameConverter class to transform the numerical state ids into human
readable names.
@param xContext
The accessible context for which to show the state names.
*/
private void showStates (XAccessibleContext xContext, String sIndentation)
{
// Get the state set object...
XAccessibleStateSet xStateSet = xContext.getAccessibleStateSet();
// ...and retrieve an array of numerical ids.
short aStates[] = xStateSet.getStates();
// Iterate over the array and print the names of the states.
msTextContent += sIndentation + "States : ";
for (int i=0; i<aStates.length; i++)
{
if (i > 0)
msTextContent += ", ";
msTextContent += NameProvider.getStateName(aStates[i]);
}
msTextContent += "\n";
}
/** When the given object supports the XAccessibleComponent interface then
show its size and location on the screen.
*/
private void showComponentInfo (XAccessibleContext xContext, String sIndentation)
{
// Try to cast the given accessible context to the
// XAccessibleComponent interface.
XAccessibleComponent xComponent =
UnoRuntime.queryInterface(
XAccessibleComponent.class, xContext);
if (xComponent != null)
{
Point aLocation = xComponent.getLocationOnScreen();
msTextContent += sIndentation + "Position : "
+ aLocation.X + ", " + aLocation.Y + "\n";
Size aSize = xComponent.getSize();
msTextContent += sIndentation + "Size : "
+ aSize.Width + ", " + aSize.Height + "\n";
}
}
/** Print the names of the given object and its parents and return an
indentation string that can be used to print further information
about the object.
*/
private String showParents (XAccessibleContext xContext)
{
// Create the path from the given object to its tree's root.
Vector<XAccessibleContext> aPathToRoot = new Vector<XAccessibleContext>();
while (xContext != null)
{
aPathToRoot.add (xContext);
// Go up the hierarchy one level to the object's parent.
try
{
XAccessible xParent = xContext.getAccessibleParent();
if (xParent != null)
xContext = xParent.getAccessibleContext();
else
xContext = null;
}
catch (Exception e)
{
System.err.println ("caught exception " + e + " while getting path to root");
}
}
// Print the path in the accessibility tree from the given context to
// the root.
String sIndentation = new String ();
for (int i=aPathToRoot.size()-1; i>=0; i--)
{
XAccessibleContext xParentContext = aPathToRoot.get(i);
String sParentName = xParentContext.getAccessibleName();
if (sParentName.length() == 0)
sParentName = "<unnamed> / Role "
+ NameProvider.getRoleName(xParentContext.getAccessibleRole());
msTextContent += sIndentation + sParentName + "\n";
sIndentation += msIndentation;
}
return sIndentation;
}
/// The text widget that is used for the actual text display.
private JTextArea maText;
/// The indentation with which an object's child is indented.
private final String msIndentation = new String(" ");
/// The text content displayed by this object.
private String msTextContent = new String ();
}
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