/*
* Copyright (c) 2011, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
*
* 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 com.google.dart.tools.ui.text.folding;
import org.eclipse.jface.text.source.projection.ProjectionViewer;
import org.eclipse.ui.texteditor.ITextEditor;
/**
* Contributors to the <code>org.eclipse.wst.jsdt.ui.foldingStructureProvider</code> extension point
* must specify an implementation of this interface which will create and maintain
* {@link org.eclipse.jface.text.source.projection.ProjectionAnnotation} objects that define folded
* regions in the {@link org.eclipse.jface.text.source.projection.ProjectionViewer}.
* <p>
* Clients may implement this interface.
* </p>
* <p>
* In order to provide backward compatibility for clients of
* <code>IJavaFoldingStructureProvider</code>, extension interfaces are used to provide a means of
* evolution. The following extension interfaces exist:
* <ul>
* <li>
* {@link com.google.dart.tools.ui.text.folding.IDartFoldingStructureProviderExtension} since
* version 3.2 introducing the following functions:
* <ul>
* <li>collapsing of comments and members</li>
* <li>expanding and collapsing of certain JavaScript elements</li>
* </ul>
* </li>
* </ul>
* </p>
* Provisional API: This class/interface is part of an interim API that is still under development
* and expected to change significantly before reaching stability. It is being made available at
* this early stage to solicit feedback from pioneering adopters on the understanding that any code
* that uses this API will almost certainly be broken (repeatedly) as the API evolves.
*/
public interface IDartFoldingStructureProvider {
/**
* (Re-)initializes the structure provided by the receiver.
*/
public abstract void initialize();
/**
* Installs this structure provider on the given editor and viewer. Implementations should listen
* to the projection events generated by <code>viewer</code> and enable / disable generation of
* projection structure accordingly.
*
* @param editor the editor that this provider works on
* @param viewer the projection viewer that displays the annotations created by this structure
* provider
*/
public abstract void install(ITextEditor editor, ProjectionViewer viewer);
/**
* Uninstalls this structure provider. Any references to editors or viewers should be cleared.
*/
public abstract void uninstall();
}