org.eclipse.ui.INavigationLocation Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui;
/**
* Represents the context marked for the user in the navigation history.
*
* Not intended to be implemented by clients. Clients should subclass NavigationLocation
* instead.
*
* @since 2.1
* @noimplement This interface is not intended to be implemented by clients.
*/
public interface INavigationLocation {
/**
* Disposes of this location and frees any allocated resource.
*/
void dispose();
/**
* Release any state kept by this location. Any relevant state should be
* saved by the previous call of saveState(IMemento). This object will
* not be used until restoreState is called again.
*/
void releaseState();
/**
* Persists the state of this location into the memento
*
* @param memento the storage were the state should be saved into.
*/
void saveState(IMemento memento);
/**
* Restore the state of this location from the memento
*
* @param memento the storage were the state was saved into.
*/
void restoreState(IMemento memento);
/**
* Restore the context saved by this location.
*/
void restoreLocation();
/**
* Merge the receiver into currentLocation. Return true if
* the two locations could be merged otherwise return false.
*
* This message is sent to all locations before being added to the history;
* given the change to the new location to merge itself into the current
* location minimizing the number of entries in the navigation history.
*
*
* @param currentLocation where the receiver should be merged into
* @return boolean true if the merge was possible
*/
boolean mergeInto(INavigationLocation currentLocation);
/**
* Returns the input used for this location. Returns null if the
* receiver's state has been released.
*
* @return the input for this location
*/
Object getInput();
/**
* Returns the display name for this location. This name is used in the
* navigation history list.
*
* @return the display name
*/
String getText();
/**
* Sets the location's input.
*
* Should not be called by clients.
*
*
* @param input the editor input.
*/
void setInput(Object input);
/**
* The message update is sent to the active location before
* another location becomes active.
*/
void update();
}