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/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Copyright @ 2015 Atlassian Pty Ltd
*
* Licensed 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.java.sip.communicator.impl.gui.main.contactlist;
import java.awt.datatransfer.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.tree.*;
import net.java.sip.communicator.impl.gui.*;
import net.java.sip.communicator.impl.gui.main.chat.*;
import net.java.sip.communicator.impl.gui.main.contactlist.contactsource.*;
import net.java.sip.communicator.plugin.desktoputil.*;
import net.java.sip.communicator.service.contactlist.*;
import net.java.sip.communicator.service.gui.*;
import net.java.sip.communicator.service.protocol.*;
import net.java.sip.communicator.util.*;
/**
* A TransferHandler that we use to handle DnD operations in our
* <tt>ContactList</tt>.
*
* @author Yana Stamcheva
*/
public class ContactListTransferHandler
extends ExtendedTransferHandler
{
/**
* The data flavor used when transferring <tt>UIContact</tt>s.
*/
protected static final DataFlavor uiContactDataFlavor
= new DataFlavor(UIContact.class, "UIContact");
/**
* The logger.
*/
private static final Logger logger
= Logger.getLogger(ContactListTransferHandler.class);
/**
* The contact list, where this transfer happens.
*/
private final DefaultTreeContactList contactList;
/**
* The transferred object.
*/
private Object transferredObject = null;
/**
* Creates an instance of <tt>ContactListTransferHandler</tt> passing the
* <tt>contactList</tt> which uses this <tt>TransferHandler</tt>.
* @param contactList the <tt>DefaultContactList</tt> which uses this
* <tt>TransferHandler</tt>
*/
public ContactListTransferHandler(DefaultTreeContactList contactList)
{
this.contactList = contactList;
}
/**
* Creates a transferable for text pane components in order to enable drag
* and drop of text.
* @param component the component for which to create a
* <tt>Transferable</tt>
* @return the created <tt>Transferable</tt>
*/
@Override
protected Transferable createTransferable(JComponent component)
{
if(ConfigurationUtils.isAddContactDisabled()
&& (ConfigurationUtils.isContactMoveDisabled()
|| ConfigurationUtils.isCreateGroupDisabled()))
return null;
if (component instanceof JTree)
{
JTree tree = (JTree) component;
TreePath selectionPath = tree.getSelectionPath();
transferredObject = selectionPath.getLastPathComponent();
return new ContactListTransferable(
tree.getRowForPath(selectionPath),
selectionPath.getLastPathComponent());
}
return super.createTransferable(component);
}
/**
* Indicates whether a component will accept an import of the given
* set of data flavors prior to actually attempting to import it. We return
* <tt>true</tt> to indicate that the transfer with at least one of the
* given flavors would work and <tt>false</tt> to reject the transfer.
* <p>
* @param comp component
* @param flavor the data formats available
* @return true if the data can be inserted into the component, false
* otherwise
* @throws NullPointerException if <code>support</code> is {@code null}
*/
@Override
public boolean canImport(JComponent comp, DataFlavor flavor[])
{
if(!(transferredObject instanceof ContactNode))
return false;
Object selectedObject = (((ContactNode)transferredObject)
.getContactDescriptor()).getDescriptor();
if (selectedObject instanceof MetaContact)
{
MetaContact metaContact = (MetaContact) selectedObject;
Iterator<Contact> contacts = metaContact.getContacts();
while(contacts.hasNext())
{
Contact contact = contacts.next();
if(contact.getPersistableAddress() == null)
{
return false;
}
}
}
for (int i = 0, n = flavor.length; i < n; i++)
{
if (flavor[i].equals(uiContactDataFlavor))
{
return true;
}
}
return super.canImport(comp, flavor);
}
/**
* Handles transfers to the contact list from the clip board or a
* DND drop operation. The <tt>Transferable</tt> parameter contains the
* data that needs to be imported.
*
* @param comp the component to receive the transfer
* @param t the data to import
* @return <tt>true</tt> if the data was inserted into the component;
* <tt>false</tt>, otherwise
* @see TransferHandler#importData(JComponent, Transferable)
*/
@Override
@SuppressWarnings("unchecked") //taken care of
public boolean importData(JComponent comp, Transferable t)
{
if (t.isDataFlavorSupported(DataFlavor.javaFileListFlavor))
{
Object o = null;
try
{
o = t.getTransferData(DataFlavor.javaFileListFlavor);
}
catch (UnsupportedFlavorException e)
{
if (logger.isDebugEnabled())
logger.debug("Failed to drop files.", e);
}
catch (IOException e)
{
if (logger.isDebugEnabled())
logger.debug("Failed to drop files.", e);
}
if (o instanceof Collection)
{
ChatPanel chatPanel = getChatPanel();
if (chatPanel != null)
{
Collection<File> files = (Collection<File>) o;
for (File file : files)
{
chatPanel.sendFile(file);
GuiActivator.getUIService().getChatWindowManager()
.openChat(chatPanel, false);
}
return true;
}
}
}
else if (t.isDataFlavorSupported(uiContactDataFlavor))
{
Object o = null;
try
{
o = t.getTransferData(uiContactDataFlavor);
}
catch (UnsupportedFlavorException e)
{
if (logger.isDebugEnabled())
logger.debug("Failed to drop meta contact.", e);
}
catch (IOException e)
{
if (logger.isDebugEnabled())
logger.debug("Failed to drop meta contact.", e);
}
if (o instanceof ContactNode
&& comp instanceof TreeContactList)
{
UIContact transferredContact
= ((ContactNode) o).getContactDescriptor();
// We support darg&drop for MetaContacts only.
if (!(transferredContact instanceof MetaUIContact))
return false;
TreeContactList list = (TreeContactList) comp;
Object dest = list.getSelectedValue();
if (transferredContact == null)
return false;
if(transferredContact.getDescriptor() instanceof MetaContact)
{
// check if underlying account is readonly
MetaContact metaContact =
(MetaContact)transferredContact.getDescriptor();
boolean onlyReadonlyContacts = true;
Iterator<Contact> iter = metaContact.getContacts();
while(iter.hasNext())
{
Contact c = iter.next();
ProtocolProviderService pp = c.getProtocolProvider();
OperationSetPersistentPresencePermissions
opsetPermissions = pp.getOperationSet(
OperationSetPersistentPresencePermissions.class);
if( opsetPermissions == null
|| !opsetPermissions.isReadOnly(c))
{
onlyReadonlyContacts = false;
break;
}
}
if(onlyReadonlyContacts)
return false;
}
if (dest instanceof ContactNode)
{
UIContact destContact
= ((ContactNode) dest).getContactDescriptor();
// We support darg&drop for MetaContacts only for now.
if (!(destContact instanceof MetaUIContact))
return false;
if (transferredContact != destContact)
{
String mergeEnabledStr =
GuiActivator.getResources().getSettingsString(
"impl.gui.dnd.MERGE_ENABLED");
// by default merging contacts is enabled
if(mergeEnabledStr != null
&& !Boolean.parseBoolean(mergeEnabledStr))
{
UIGroup destGroup =
destContact.getParentGroup();
if (destGroup == null
|| !(destGroup instanceof MetaUIGroup)
|| (ConfigurationUtils
.isContactMoveDisabled()
|| ConfigurationUtils
.isCreateGroupDisabled()))
return false;
MetaContactListManager.moveMetaContactToGroup(
(MetaContact) transferredContact
.getDescriptor(),
(MetaContactGroup) destGroup
.getDescriptor());
}
else
{
if(!ConfigurationUtils.isAddContactDisabled())
{
MetaContactListManager
.moveMetaContactToMetaContact(
(MetaContact) transferredContact
.getDescriptor(),
(MetaContact) destContact
.getDescriptor());
}
}
}
return true;
}
else if (dest instanceof GroupNode)
{
UIGroup destGroup
= ((GroupNode) dest).getGroupDescriptor();
// We support darg&drop for MetaContacts only for now.
if (!(destGroup instanceof MetaUIGroup)
&& !destGroup.equals(list.getRootUIGroup()))
{
return false;
}
if (destGroup instanceof MetaUIGroup
&& !transferredContact
.getParentGroup().equals(destGroup)
&& !(ConfigurationUtils.isContactMoveDisabled()
&& ConfigurationUtils.isCreateGroupDisabled()))
{
MetaContactListManager.moveMetaContactToGroup(
(MetaContact) transferredContact.getDescriptor(),
(MetaContactGroup) destGroup.getDescriptor());
}
else if(destGroup.equals(list.getRootUIGroup()))
{
MetaContactListManager.moveMetaContactToGroup(
(MetaContact) transferredContact.getDescriptor(),
GuiActivator.getContactListService().getRoot());
}
return true;
}
}
}
return false;
}
/**
* Overrides <tt>TransferHandler.getVisualRepresentation(Transferable t)</tt>
* in order to return a custom drag icon.
* <p>
* The default parent implementation of this method returns null.
*
* @param t the data to be transferred; this value is expected to have been
* created by the <code>createTransferable</code> method
* @return the icon to show when dragging
*/
@Override
public Icon getVisualRepresentation(Transferable t)
{
Icon icon = null;
if (t instanceof ContactListTransferable)
{
ContactListTransferable transferable = ((ContactListTransferable) t);
try
{
icon = ((ContactListTreeCellRenderer)
contactList.getCellRenderer()).getDragIcon(
contactList,
transferable.getTransferData(uiContactDataFlavor),
transferable.getTransferIndex());
}
catch (UnsupportedFlavorException e)
{
if (logger.isDebugEnabled())
logger.debug(
"Unsupported flavor while" +
" obtaining transfer data.", e);
}
catch (IOException e)
{
if (logger.isDebugEnabled())
logger.debug(
"The data for the request flavor" +
" is no longer available.", e);
}
}
return icon;
}
/**
* Returns the <tt>ChatPanel</tt> corresponding to the currently selected
* contact.
*
* @return the <tt>ChatPanel</tt> corresponding to the currently selected
* contact.
*/
private ChatPanel getChatPanel()
{
ChatPanel chatPanel = null;
Object selectedObject = contactList.getSelectedValue();
if (selectedObject instanceof MetaContact)
{
MetaContact metaContact = (MetaContact) selectedObject;
// Obtain the corresponding chat panel.
chatPanel = GuiActivator.getUIService().getChatWindowManager()
.getContactChat(metaContact, true);
}
return chatPanel;
}
/**
* Transferable for JList that enables drag and drop of contacts.
*/
public class ContactListTransferable implements Transferable
{
private int transferredIndex;
private Object transferredObject;
/**
* Creates an instance of <tt>ContactListTransferable</tt>.
* @param index the index of the transferred object in the list
* @param o the transferred list object
*/
public ContactListTransferable(int index, Object o)
{
this.transferredIndex = index;
this.transferredObject = o;
}
/**
* Returns supported flavors.
* @return an array of supported flavors
*/
public DataFlavor[] getTransferDataFlavors()
{
return new DataFlavor[] { uiContactDataFlavor,
DataFlavor.stringFlavor};
}
/**
* Returns <tt>true</tt> if the given <tt>flavor</tt> is supported,
* otherwise returns <tt>false</tt>.
* @param flavor the data flavor to verify
* @return <tt>true</tt> if the given <tt>flavor</tt> is supported,
* otherwise returns <tt>false</tt>
*/
public boolean isDataFlavorSupported(DataFlavor flavor)
{
return uiContactDataFlavor.equals(flavor)
|| DataFlavor.stringFlavor.equals(flavor);
}
/**
* Returns the selected text.
* @param flavor the flavor
* @return the selected text
* @exception UnsupportedFlavorException if the requested data flavor
* is not supported.
* @exception IOException if the data is no longer available in the
* requested flavor.
*/
public Object getTransferData(DataFlavor flavor)
throws UnsupportedFlavorException,
IOException
{
if (uiContactDataFlavor.equals(flavor))
{
return transferredObject;
}
else if (DataFlavor.stringFlavor.equals(flavor))
{
if (transferredObject instanceof ContactNode)
return ((ContactNode) transferredObject)
.getContactDescriptor().getDisplayName();
}
else
throw new UnsupportedFlavorException(flavor);
return null;
}
/**
* Returns the index of the transferred list cell.
* @return the index of the transferred list cell
*/
public int getTransferIndex()
{
return transferredIndex;
}
}
}
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