com.google.devtools.depan.eclipse.ui.nodes.viewers.NodeListViewProvider.java Source code

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Here is the source code for com.google.devtools.depan.eclipse.ui.nodes.viewers.NodeListViewProvider.java

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/*
 * Copyright 2016 The Depan Project Authors
 *
 * 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 com.google.devtools.depan.eclipse.ui.nodes.viewers;

import com.google.devtools.depan.eclipse.ui.nodes.trees.GraphData;
import com.google.devtools.depan.eclipse.ui.nodes.trees.SolitaryRoot;
import com.google.devtools.depan.eclipse.ui.nodes.trees.ViewerRoot;
import com.google.devtools.depan.model.GraphNode;
import com.google.devtools.depan.nodes.trees.TreeModel;

import com.google.common.collect.Lists;

import org.eclipse.core.runtime.PlatformObject;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.viewers.TreeViewer;

import java.util.Collection;
import java.util.List;

/**
 * {@link NodeViewerProvider} for node lists (non-hierarchical).
 * 
 * @author <a href="leeca@pnambic.com">Lee Carver</a>
 * @param <E>
 */
public class NodeListViewProvider<T> implements NodeViewerProvider {

    private final String listLabel;

    // Displayed content
    private final Collection<GraphNode> nodes;

    private NodeTreeProvider<T> provider;

    private GraphData<T> solo;

    public NodeListViewProvider(String listLabel, Collection<GraphNode> nodes) {
        this.listLabel = listLabel;
        this.nodes = nodes;
    }

    public void setProvider(NodeTreeProvider<T> provider) {
        this.provider = provider;
    }

    @Override
    public void addMultiActions(IMenuManager manager) {
    }

    @Override
    public void addItemActions(IMenuManager manager, Object menuElement) {
    }

    @Override
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public PlatformObject buildViewerRoots() {
        List<PlatformObject> result = Lists.newArrayList();

        TreeModel.Flat model = new TreeModel.Flat(nodes);
        solo = new GraphData(provider, model);
        result.add(new SolitaryRoot(solo, listLabel));
        return new ViewerRoot(result.toArray());
    }

    @Override
    public void updateExpandState(TreeViewer viewer) {
        if (nodes.size() < NodeViewerProvider.AUTO_EXPAND_LIMIT) {
            viewer.expandAll();
        }
    }

    @Override
    public Object findNodeObject(GraphNode node) {
        return solo.getNodeWrapper(node);
    }
}