com.ecfeed.ui.editor.actions.ExpandAction.java Source code

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Here is the source code for com.ecfeed.ui.editor.actions.ExpandAction.java

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/*******************************************************************************
 *
 * Copyright (c) 2016 ecFeed AS.                                                
 * All rights reserved. This program and the accompanying materials              
 * are made available under the terms of the Eclipse Public License v1.0         
 * which accompanies this distribution, and is available at                      
 * http://www.eclipse.org/legal/epl-v10.html 
 *  
 *******************************************************************************/

package com.ecfeed.ui.editor.actions;

import java.util.List;

import org.eclipse.jface.viewers.TreeViewer;

import com.ecfeed.core.model.AbstractNode;

public class ExpandAction extends ModelSelectionAction {

    TreeViewer fViewer;

    public ExpandAction(TreeViewer viewer) {
        super(GlobalActions.EXPAND.getId(), GlobalActions.EXPAND.getName(), viewer);
        fViewer = viewer;
    }

    @Override
    public boolean isEnabled() {
        boolean enabled = false;
        List<AbstractNode> nodes = getSelectedNodes();
        for (AbstractNode node : nodes) {
            if ((fViewer.isExpandable(node)) && (getBranchExpandedState(node, fViewer) == false)) {
                enabled = true;
            }
        }
        return enabled;
    }

    @Override
    public void run() {
        for (AbstractNode node : getSelectedNodes()) {
            fViewer.expandToLevel(node, TreeViewer.ALL_LEVELS);
        }
    }

    protected boolean getBranchExpandedState(AbstractNode branchRoot, TreeViewer viewer) {
        if (branchRoot.getChildren().size() == 0)
            return true;
        if (viewer.getExpandedState(branchRoot) == false)
            return false;
        for (AbstractNode child : branchRoot.getChildren()) {
            if (getBranchExpandedState(child, viewer) == false)
                return false;
        }
        return true;
    }
}