com.aptana.git.ui.actions.AbstractDynamicBranchItem.java Source code

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Here is the source code for com.aptana.git.ui.actions.AbstractDynamicBranchItem.java

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/**
 * Aptana Studio
 * Copyright (c) 2005-2011 by Appcelerator, Inc. All Rights Reserved.
 * Licensed under the terms of the GNU Public License (GPL) v3 (with exceptions).
 * Please see the license.html included with this distribution for details.
 * Any modifications to this file must keep this entire header intact.
 */
package com.aptana.git.ui.actions;

import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.action.IContributionItem;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.ISources;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.actions.CompoundContributionItem;
import org.eclipse.ui.menus.IWorkbenchContribution;
import org.eclipse.ui.services.IEvaluationService;
import org.eclipse.ui.services.IServiceLocator;

import com.aptana.git.core.GitPlugin;
import com.aptana.git.core.model.IGitRepositoryManager;

abstract class AbstractDynamicBranchItem extends CompoundContributionItem implements IWorkbenchContribution {

    protected static final IContributionItem[] NO_CONTRIBUTION_ITEMS = new IContributionItem[0];

    private IServiceLocator serviceLocator;

    protected AbstractDynamicBranchItem() {
        super();
    }

    protected AbstractDynamicBranchItem(String id) {
        super(id);
    }

    protected IGitRepositoryManager getGitRepositoryManager() {
        return GitPlugin.getDefault().getGitRepositoryManager();
    }

    protected IResource getSelectedResource() {
        IEvaluationService evalService = (IEvaluationService) serviceLocator.getService(IEvaluationService.class);

        if (evalService != null) {
            IEvaluationContext context = evalService.getCurrentState();
            IWorkbenchPart activePart = (IWorkbenchPart) context.getVariable(ISources.ACTIVE_PART_NAME);
            if (activePart instanceof IEditorPart) {
                IEditorInput input = (IEditorInput) context.getVariable(ISources.ACTIVE_EDITOR_INPUT_NAME);
                return (IResource) input.getAdapter(IResource.class);
            }
            ISelection selection = (ISelection) context.getVariable(ISources.ACTIVE_CURRENT_SELECTION_NAME);
            if (selection instanceof IStructuredSelection) {
                IStructuredSelection struct = (IStructuredSelection) selection;
                Object firstElement = struct.getFirstElement();
                if (firstElement instanceof IResource) {
                    return (IResource) firstElement;
                } else if (firstElement instanceof IAdaptable) {
                    IAdaptable adaptable = (IAdaptable) firstElement;
                    return (IResource) adaptable.getAdapter(IResource.class);
                }
            }
        }
        return null;
    }

    public void initialize(IServiceLocator serviceLocator) {
        this.serviceLocator = serviceLocator;
    }
}