de.loskutov.bco.ui.EclipseUtils.java Source code

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Here is the source code for de.loskutov.bco.ui.EclipseUtils.java

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/*****************************************************************************************
 * Copyright (c) 2004 Andrei Loskutov. All rights reserved. This program and the
 * accompanying materials are made available under the terms of the BSD License which
 * accompanies this distribution, and is available at
 * http://www.opensource.org/licenses/bsd-license.php Contributor: Andrei Loskutov -
 * initial API and implementation
 ****************************************************************************************/

package de.loskutov.bco.ui;

import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.texteditor.ITextEditor;

import de.loskutov.bco.BytecodeOutlinePlugin;

/**
 * @author Andrei
 */
public class EclipseUtils {

    /**
     * don't call me ;)
     */
    private EclipseUtils() {
        super();
    }

    /**
     * @return current active editor in workbench
     */
    public static IEditorPart getActiveEditor() {
        IWorkbenchWindow window = BytecodeOutlinePlugin.getDefault().getWorkbench().getActiveWorkbenchWindow();
        if (window != null) {
            IWorkbenchPage page = window.getActivePage();
            if (page != null) {
                return page.getActiveEditor();
            }
        }
        return null;
    }

    /**
     * @param part
     * @return editor input as IJavaElement
     */
    public static IJavaElement getJavaInput(IEditorPart part) {
        IEditorInput editorInput = part.getEditorInput();
        if (editorInput != null) {
            IJavaElement input = (IJavaElement) editorInput.getAdapter(IJavaElement.class);
            return input;
        }
        return null;
    }

    /**
     * @param editor
     * @param offset
     * @param length
     */
    public static void selectInEditor(ITextEditor editor, int offset, int length) {
        IEditorPart active = getActiveEditor();
        if (active != editor) {
            editor.getSite().getPage().activate(editor);
        }
        editor.selectAndReveal(offset, length);
    }

    /**
     * @param selectionProvider
     * @return TextSelection or null, if provider does not provide TextSelection's
     */
    public static ITextSelection getSelection(ISelectionProvider selectionProvider) {
        ISelection selection = selectionProvider.getSelection();
        if (selection instanceof ITextSelection) {
            return (ITextSelection) selection;
        }
        return null;
    }

    /**
     * @param resource
     * @return full package name in default java notation (with dots)
     */
    public static String getJavaPackageName(IJavaElement resource) {
        String name;
        if (resource == null) {
            return "";
        }
        name = resource.getElementName();
        if (name == null) {
            return "";
        }
        int type = resource.getElementType();
        if (type == IJavaElement.PACKAGE_FRAGMENT || type == IJavaElement.PACKAGE_FRAGMENT_ROOT) {
            return name;
        }
        IJavaElement ancestor = resource.getAncestor(IJavaElement.PACKAGE_FRAGMENT);
        if (ancestor != null) {
            return ancestor.getElementName();
        }
        return ""; //$NON-NLS-1$
    }

}