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+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * 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 .
+ */
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import com.sun.star.accessibility.XAccessible;
+import com.sun.star.accessibility.XAccessibleComponent;
+import com.sun.star.accessibility.XAccessibleContext;
+import com.sun.star.accessibility.XAccessibleEditableText;
+import com.sun.star.accessibility.XAccessibleSelection;
+import com.sun.star.accessibility.XAccessibleTable;
+import com.sun.star.accessibility.XAccessibleText;
+import com.sun.star.uno.UnoRuntime;
+
+/**
+ * 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
+{
+ private class HandlerDescriptor
+ {
+ private HandlerDescriptor (NodeHandler aHandler)
+ {
+ maHandler = aHandler;
+ mnChildCount = -1;
+ }
+ private NodeHandler maHandler;
+ private int mnChildCount;
+ }
+ /// NodeHandlers for this node
+ private ArrayList<HandlerDescriptor> maHandlers;
+
+ // The accessible context of this node.
+ private XAccessibleContext mxContext;
+ private XAccessibleComponent mxComponent;
+ private XAccessibleText mxText;
+ private XAccessibleTable mxTable;
+
+ public AccTreeNode (XAccessibleContext xContext, Object aDisplay, AccessibleTreeNode aParent)
+ {
+ super (aDisplay, aParent);
+
+ maHandlers = new ArrayList<HandlerDescriptor>(5);
+ mxContext = xContext;
+ }
+
+ /** 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.
+ */
+ @Override
+ public void update ()
+ {
+ for (int i=0; i<maHandlers.size(); i++)
+ {
+ System.out.println ("replacing handler " + i);
+ HandlerDescriptor aDescriptor = maHandlers.get(i);
+ aDescriptor.maHandler = aDescriptor.maHandler.createHandler (mxContext);
+ aDescriptor.mnChildCount =
+ aDescriptor.maHandler.getChildCount ();
+ }
+ }
+
+ public XAccessibleContext getContext ()
+ {
+ return mxContext;
+ }
+
+ public XAccessibleComponent getComponent ()
+ {
+ if (mxComponent == null && mxContext != null)
+ mxComponent = UnoRuntime.queryInterface(
+ XAccessibleComponent.class, mxContext);
+ return mxComponent;
+ }
+
+ public XAccessibleText getText ()
+ {
+ if (mxText == null && mxContext != null)
+ mxText = UnoRuntime.queryInterface(
+ XAccessibleText.class, mxContext);
+ return mxText;
+ }
+
+ public XAccessibleEditableText getEditText ()
+ {
+ return UnoRuntime.queryInterface(
+ XAccessibleEditableText.class, mxContext);
+ }
+
+ public XAccessibleTable getTable ()
+ {
+ if (mxTable == null && mxContext != null)
+ mxTable = UnoRuntime.queryInterface(
+ XAccessibleTable.class, mxContext);
+ return mxTable;
+ }
+
+
+ public XAccessibleSelection getSelection ()
+ {
+ return 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 */
+ private HandlerDescriptor getHandlerDescriptor (int i)
+ {
+ HandlerDescriptor aDescriptor = maHandlers.get(i);
+ if (aDescriptor.mnChildCount < 0)
+ aDescriptor.mnChildCount =
+ aDescriptor.maHandler.getChildCount ();
+ return aDescriptor;
+ }
+
+ @Override
+ 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 */
+ @Override
+ 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;
+ }
+
+ @Override
+ public AccessibleTreeNode getChildNoCreate (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.getChildNoCreate (nIndex);
+ else
+ nIndex -= aDescriptor.mnChildCount;
+ }
+ }
+ else
+ throw new IndexOutOfBoundsException();
+
+ // nothing found?
+ return null;
+ }
+
+ @Override
+ 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 (nIndex);
+ aDescriptor.mnChildCount = aDescriptor.maHandler.getChildCount ();
+ break;
+ }
+ else
+ nIndex -= aDescriptor.mnChildCount;
+ }
+ }
+ else
+ throw new IndexOutOfBoundsException();
+
+ return bStatus;
+ }
+
+
+ @Override
+ 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 */
+ @Override
+ public boolean isLeaf()
+ {
+ return maHandlers.isEmpty();
+ }
+
+ @Override
+ public boolean equals (Object aOther)
+ {
+ return (this == aOther) || (aOther!=null && aOther.equals(mxContext));
+ }
+
+
+ /** iterate over handlers until the child is found */
+ public void getActions(java.util.List<String> aActions)
+ {
+ for(int i = 0; i < maHandlers.size(); i++)
+ {
+ HandlerDescriptor aDescriptor = getHandlerDescriptor (i);
+ NodeHandler aHandler = aDescriptor.maHandler;
+ String[] aHandlerActions = aHandler.getActions (this);
+ aActions.addAll(Arrays.asList(aHandlerActions));
+ }
+ }
+
+ @Override
+ public void performAction( int nIndex )
+ {
+ 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);
+ NodeHandler aHandler = aDescriptor.maHandler;
+ int nCount = aHandler.getActions(this).length;
+ if( nCount > nIndex )
+ {
+ aHandler.performAction(this, nIndex );
+ 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 ();
+ return aNode;
+ }
+ }
+ return null;
+ }
+
+ public java.util.List<Integer> updateChildren (java.lang.Class class1, java.lang.Class<AccessibleExtendedComponentHandler> class2)
+ {
+ ArrayList<Integer> aChildIndices = new ArrayList<Integer>();
+ 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 ();
+ aDescriptor.mnChildCount = nChildCount;
+ // Fill in the indices of the updated children.
+ for (int j=0; j<nChildCount; j++)
+ aChildIndices.add(j+nOffset);
+ }
+ nOffset += aDescriptor.mnChildCount;
+ }
+ return aChildIndices;
+ }
+}