org.axdt.as3.ui.util.ToggleAxdtNatureAction.java Source code

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Here is the source code for org.axdt.as3.ui.util.ToggleAxdtNatureAction.java

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/*******************************************************************************
 * Copyright (c) 2010 Martin Schnabel <mb0@mb0.org>.
 * 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 org.axdt.as3.ui.util;

import java.util.List;

import org.apache.log4j.Logger;
import org.axdt.core.AxdtCore;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.xtext.ui.XtextProjectHelper;

import com.google.common.collect.Lists;

public class ToggleAxdtNatureAction implements IObjectActionDelegate {

    private IStructuredSelection selection;

    public void run(IAction action) {
        if (selection == null)
            return;
        List<IProject> selectedProjects = getSelectedProjects(selection);
        for (IProject project : selectedProjects) {
            if (project.isOpen())
                try {
                    toggleNature(project);
                } catch (CoreException e) {
                    Logger.getLogger(getClass()).error(e.getMessage(), e);
                }
        }
    }

    private void toggleNature(IProject project) throws CoreException {
        IProjectDescription description = project.getDescription();
        String[] natures = description.getNatureIds();
        boolean foundXtextNature = false;
        for (int i = 0; i < natures.length; i++) {
            if (XtextProjectHelper.NATURE_ID.equals(natures[i]))
                foundXtextNature = true;
            if (AxdtCore.NATURE_ID.equals(natures[i])) {
                String[] newNatures = new String[natures.length - 1];
                System.arraycopy(natures, 0, newNatures, 0, i);
                System.arraycopy(natures, i + 1, newNatures, i, natures.length - i - 1);
                description.setNatureIds(newNatures);
                project.setDescription(description, null);
                return;
            }
        }
        String[] newNatures = new String[natures.length + (foundXtextNature ? 1 : 2)];
        System.arraycopy(natures, 0, newNatures, 0, natures.length);
        newNatures[natures.length] = AxdtCore.NATURE_ID;
        if (!foundXtextNature)
            newNatures[natures.length + 1] = XtextProjectHelper.NATURE_ID;
        description.setNatureIds(newNatures);
        project.setDescription(description, null);
    }

    private List<IProject> getSelectedProjects(IStructuredSelection sel) {
        List<IProject> result = Lists.newArrayListWithExpectedSize(sel.size());
        for (Object elem : sel.toArray()) {
            IProject project = null;
            if (elem instanceof IFile)
                project = ((IFile) elem).getProject();
            else if (elem instanceof IProject)
                project = (IProject) elem;
            if (project != null && !result.contains(project))
                result.add(project);
        }
        return result;
    }

    public static boolean hasNature(IProject project) {
        try {
            if (project.isAccessible()) {
                return project.hasNature(XtextProjectHelper.NATURE_ID) && project.hasNature(AxdtCore.NATURE_ID);
            }
        } catch (CoreException e) {
            Logger.getLogger(ToggleAxdtNatureAction.class).error(e.getMessage(), e);
        }
        return false;
    }

    public void selectionChanged(IAction action, ISelection selection) {
        if (selection instanceof IStructuredSelection)
            this.selection = (IStructuredSelection) selection;
    }

    public void setActivePart(IAction action, IWorkbenchPart targetPart) {
    }
}