office-gobmx/toolkit/test/accessibility/AccTreeNode.java

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Java
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import com.sun.star.uno.UnoRuntime;
import drafts.com.sun.star.accessibility.*;
import java.util.Vector;
/**
* The node type for the AccessibleTreeModel.
* This implements all the child-handling based on the appropriate
* NodeHandlers. Trivial nodes can be implemented by any Object
* type.
*/
class AccTreeNode
extends AccessibleTreeNode
{
class HandlerDescriptor
{
public HandlerDescriptor (NodeHandler aHandler)
{
maHandler = aHandler;
mnChildCount = -1;
}
public NodeHandler maHandler;
public int mnChildCount;
}
/// NodeHandlers for this node
private Vector maHandlers;
// The accessible context of this node.
private XAccessible mxAccessible;
private XAccessibleContext mxContext;
private XAccessibleComponent mxComponent;
private XAccessibleText mxText;
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private XAccessibleTable mxTable;
public AccTreeNode (XAccessibleContext xContext, AccessibleTreeNode aParent)
{
this (xContext, xContext, aParent);
}
public AccTreeNode (XAccessibleContext xContext, Object aDisplay, AccessibleTreeNode aParent)
{
super (aDisplay, aParent);
maHandlers = new Vector(5);
mxContext = xContext;
mxAccessible = null;
}
/** Update the internal data extracted from the corresponding accessible
object. This is done by replacing every handler by a new one. An
update method at each handler would be better of course.
*/
public void update ()
{
for (int i=0; i<maHandlers.size(); i++)
{
System.out.println ("replacing handler " + i);
HandlerDescriptor aDescriptor = (HandlerDescriptor)maHandlers.get(i);
aDescriptor.maHandler = aDescriptor.maHandler.createHandler (mxContext);
aDescriptor.mnChildCount =
aDescriptor.maHandler.getChildCount (this);
}
}
public XAccessibleContext getContext ()
{
return mxContext;
}
public XAccessibleComponent getComponent ()
{
if (mxComponent == null && mxContext != null)
mxComponent = (XAccessibleComponent)UnoRuntime.queryInterface(
XAccessibleComponent.class, mxContext);
return mxComponent;
}
public XAccessibleExtendedComponent getExtendedComponent ()
{
if (mxComponent == null)
getComponent();
if (mxComponent != null)
return (XAccessibleExtendedComponent)UnoRuntime.queryInterface(
XAccessibleExtendedComponent.class, mxComponent);
else
return null;
}
public XAccessibleText getText ()
{
if (mxText == null && mxContext != null)
mxText = (XAccessibleText)UnoRuntime.queryInterface(
XAccessibleText.class, mxContext);
return mxText;
}
public XAccessibleEditableText getEditText ()
{
return (XAccessibleEditableText)UnoRuntime.queryInterface(
XAccessibleEditableText.class, mxContext);
}
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public XAccessibleTable getTable ()
{
if (mxTable == null && mxContext != null)
mxTable = (XAccessibleTable)UnoRuntime.queryInterface(
XAccessibleTable.class, mxContext);
return mxTable;
}
public XAccessible getAccessible()
{
if ((mxAccessible == null) && (mxContext != null))
mxAccessible = (XAccessible)UnoRuntime.queryInterface(
XAccessible.class, mxContext);
return mxAccessible;
}
public XAccessibleSelection getSelection ()
{
return (XAccessibleSelection)UnoRuntime.queryInterface(
XAccessibleSelection.class, mxContext);
}
public void addHandler( NodeHandler aHandler )
{
if (aHandler != null)
maHandlers.add (new HandlerDescriptor (aHandler));
}
/** iterate over handlers and return child sum */
protected HandlerDescriptor getHandlerDescriptor (int i)
{
HandlerDescriptor aDescriptor = (HandlerDescriptor)maHandlers.get(i);
if (aDescriptor.mnChildCount < 0)
aDescriptor.mnChildCount =
aDescriptor.maHandler.getChildCount (this);
return aDescriptor;
}
public int getChildCount()
{
int nChildCount = 0;
for (int i = 0; i < maHandlers.size(); i++)
{
HandlerDescriptor aDescriptor = getHandlerDescriptor (i);
nChildCount += aDescriptor.mnChildCount;
}
return nChildCount;
}
/** iterate over handlers until the child is found */
public AccessibleTreeNode getChild (int nIndex)
throws IndexOutOfBoundsException
{
if( nIndex >= 0 )
{
for(int i = 0; i < maHandlers.size(); i++)
{
// check if this handler has the child, and if not
// search with next handler
HandlerDescriptor aDescriptor = getHandlerDescriptor (i);
if (nIndex < aDescriptor.mnChildCount)
return aDescriptor.maHandler.getChild (this, nIndex);
else
nIndex -= aDescriptor.mnChildCount;
}
}
else
throw new IndexOutOfBoundsException();
// nothing found?
return null;
}
public boolean removeChild (int nIndex)
throws IndexOutOfBoundsException
{
boolean bStatus = false;
if (nIndex >= 0)
{
for (int i=0; i<maHandlers.size(); i++)
{
// check if this handler has the child, and if not
// search with next handler
HandlerDescriptor aDescriptor = getHandlerDescriptor (i);
if (nIndex < aDescriptor.mnChildCount)
{
bStatus = aDescriptor.maHandler.removeChild (this, nIndex);
aDescriptor.mnChildCount = aDescriptor.maHandler.getChildCount (this);
break;
}
else
nIndex -= aDescriptor.mnChildCount;
}
}
else
throw new IndexOutOfBoundsException();
return bStatus;
}
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public int indexOf (AccessibleTreeNode aNode)
{
int nBaseIndex = 0;
if (aNode != null)
{
for (int i=0; i<maHandlers.size(); i++)
{
HandlerDescriptor aDescriptor = getHandlerDescriptor (i);
int nIndex = aDescriptor.maHandler.indexOf (aNode);
if (nIndex >= 0)
return nBaseIndex + nIndex;
else
nBaseIndex += aDescriptor.mnChildCount;
}
}
return -1;
}
/** this node is a leaf if have no handlers, or is those
handlers show no children */
public boolean isLeaf()
{
return (maHandlers.size() == 0);// || (getChildCount() == 0);
}
public boolean equals (Object aOther)
{
return (this == aOther) || aOther.equals(mxContext);
}
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/** iterate over handlers until the child is found */
public void getActions(Vector aActions)
{
for(int i = 0; i < maHandlers.size(); i++)
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{
HandlerDescriptor aDescriptor = getHandlerDescriptor (i);
NodeHandler aHandler = aDescriptor.maHandler;
String[] aHandlerActions = aHandler.getActions (this);
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for(int j = 0; j < aHandlerActions.length; j++ )
{
aActions.add( aHandlerActions[j] );
}
}
}
public void performAction( int nIndex )
{
if( nIndex >= 0 )
{
for(int i = 0; i < maHandlers.size(); i++)
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{
// check if this handler has the child, and if not
// search with next handler
HandlerDescriptor aDescriptor = getHandlerDescriptor (i);
NodeHandler aHandler = aDescriptor.maHandler;
int nCount = aHandler.getActions(this).length;
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if( nCount > nIndex )
{
aHandler.performAction(this, nIndex );
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return;
}
else
nIndex -= nCount;
}
}
}
/** Try to add the specified accessible object as new accessible child of the
AccessibleTreeHandler.
Note that child is used in another context than
it is used in the other methods of this class.
*/
public AccessibleTreeNode addAccessibleChild (XAccessible xChild)
{
for(int i = 0; i < maHandlers.size(); i++)
{
HandlerDescriptor aDescriptor = getHandlerDescriptor (i);
if (aDescriptor.maHandler instanceof AccessibleTreeHandler)
{
AccessibleTreeHandler aHandler = (AccessibleTreeHandler)aDescriptor.maHandler;
AccessibleTreeNode aNode = aHandler.addAccessibleChild (this, xChild);
aDescriptor.mnChildCount = aHandler.getChildCount (this);
return aNode;
}
}
return null;
}
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/** Update the specified handlers.
@return
The returned array containes the indices of the updated children
and can be used to create a TreeModelEvent.
*/
public Vector update (java.lang.Class class1)
{return update (class1, null); }
public Vector update (java.lang.Class class1, java.lang.Class class2)
{
Vector aChildIndices = new Vector();
int nOffset = 0;
for(int i=0; i < maHandlers.size(); i++)
{
HandlerDescriptor aDescriptor = getHandlerDescriptor (i);
if ((class1.isInstance(aDescriptor.maHandler))
|| (class2 !=null && class2.isInstance(aDescriptor.maHandler)))
{
aDescriptor.maHandler.update(this);
// Get updated number of children.
int nChildCount = aDescriptor.maHandler.getChildCount (this);
aDescriptor.mnChildCount = nChildCount;
// Fill in the indices of the updated children.
for (int j=0; j<nChildCount; j++)
aChildIndices.add(new Integer(j+nOffset));
}
nOffset += aDescriptor.mnChildCount;
}
return aChildIndices;
}
}