com.ebmwebsourcing.petals.common.internal.projectscnf.PetalsProjectNavigator.java Source code

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Here is the source code for com.ebmwebsourcing.petals.common.internal.projectscnf.PetalsProjectNavigator.java

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/******************************************************************************
 * Copyright (c) 2010-2013, Linagora
 *
 * 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
 *
 * Contributors:
 *       Linagora - initial API and implementation
 *******************************************************************************/

package com.ebmwebsourcing.petals.common.internal.projectscnf;

import java.util.Iterator;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.ui.JavaUI;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.navigator.CommonNavigator;
import org.eclipse.ui.navigator.CommonViewer;
import org.eclipse.ui.navigator.LinkHelperService;
import org.eclipse.ui.part.ShowInContext;

import com.ebmwebsourcing.petals.common.internal.PetalsCommonPlugin;
import com.ebmwebsourcing.petals.common.internal.provisional.utils.PlatformUtils;

/**
 * @author Vincent Zurczak - EBM WebSourcing
 */
public class PetalsProjectNavigator extends CommonNavigator {

    /*
     * (non-Jsdoc)
     * @see org.eclipse.ui.navigator.CommonNavigator
     * #createCommonViewerObject(org.eclipse.swt.widgets.Composite)
     */
    @Override
    protected CommonViewer createCommonViewerObject(Composite aParent) {

        CommonViewer viewer = super.createCommonViewerObject(aParent);
        viewer.addDoubleClickListener(new IDoubleClickListener() {

            @Override
            public void doubleClick(DoubleClickEvent event) {

                if (event.getSelection() instanceof IStructuredSelection) {
                    Iterator<?> it = ((IStructuredSelection) event.getSelection()).iterator();
                    while (it.hasNext()) {

                        ICompilationUnit cu = null;
                        Object o = it.next();
                        if (o instanceof IJavaElement
                                && ((IJavaElement) o).getElementType() == IJavaElement.COMPILATION_UNIT)
                            cu = (ICompilationUnit) o;

                        if (cu != null) {
                            try {
                                JavaUI.openInEditor(cu);

                            } catch (PartInitException e) {
                                PetalsCommonPlugin.log(e, IStatus.ERROR);

                            } catch (JavaModelException e) {
                                PetalsCommonPlugin.log(e, IStatus.ERROR);
                            }
                        }
                    }
                }
            }
        });

        return viewer;
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.part.IShowInTarget
     * #show(org.eclipse.ui.part.ShowInContext)
     */
    @Override
    public boolean show(ShowInContext context) {

        IStructuredSelection selection = getSelection(context);
        if (selection != null && !selection.isEmpty()) {
            Object o = selection.getFirstElement();
            if (o instanceof IPackageFragment || o instanceof IPackageFragmentRoot
                    || o instanceof ICompilationUnit) {
                selectReveal(new StructuredSelection(o));
                return true;

            } else {
                IResource res = (IResource) PlatformUtils.getAdapter(o, IResource.class);
                if (res != null) {
                    selectReveal(new StructuredSelection(res));
                    return true;
                }
            }
        }

        return false;
    }

    /**
     * Copies from {@link CommonNavigator}.
     * @param context
     * @return
     */
    private IStructuredSelection getSelection(ShowInContext context) {

        if (context == null)
            return StructuredSelection.EMPTY;

        ISelection selection = context.getSelection();
        if (selection instanceof IStructuredSelection && !selection.isEmpty())
            return (IStructuredSelection) selection;

        Object input = context.getInput();
        if (input instanceof IEditorInput) {
            LinkHelperService lhs = getLinkHelperService();
            return lhs.getSelectionFor((IEditorInput) input);
        }

        if (input != null)
            return new StructuredSelection(input);

        return StructuredSelection.EMPTY;
    }

    /**
     * Forces the content provider to change the way Java packages are displayed (flat / hierarchical).
     * @param flatLayout
     */
    public void setFlatLayout(boolean flatLayout) {

        PetalsProjectManager.storeJavaLayoutPreference(flatLayout);
        CommonViewer viewer = getCommonViewer();
        if (viewer != null) {
            viewer.getControl().setRedraw(false);
            viewer.refresh();
            viewer.getControl().setRedraw(true);
        }
    }
}