EditFileAction.java

/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * 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:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.ide.actions;

import com.google.inject.Inject;
import com.google.inject.Singleton;

import org.eclipse.che.ide.Resources;
import org.eclipse.che.ide.api.action.AbstractPerspectiveAction;
import org.eclipse.che.ide.api.action.ActionEvent;
import org.eclipse.che.ide.api.app.AppContext;
import org.eclipse.che.ide.api.editor.EditorAgent;
import org.eclipse.che.ide.api.resources.File;
import org.eclipse.che.ide.api.resources.Resource;

import javax.validation.constraints.NotNull;

import static com.google.common.base.Preconditions.checkState;
import static java.util.Collections.singletonList;
import static org.eclipse.che.ide.workspace.perspectives.project.ProjectPerspective.PROJECT_PERSPECTIVE_ID;

/**
 * Opens file based resources taken from the application context in the editor.
 *
 * @author Vitaliy Guliy
 * @author Vlad Zhukovskyi
 * @see AppContext#getResources()
 */
@Singleton
public class EditFileAction extends AbstractPerspectiveAction {

    private final AppContext  appContext;
    private final EditorAgent editorAgent;

    @Inject
    public EditFileAction(AppContext appContext,
                          Resources resources,
                          EditorAgent editorAgent) {
        super(singletonList(PROJECT_PERSPECTIVE_ID), "Edit file", null, null, resources.defaultFile());
        this.appContext = appContext;
        this.editorAgent = editorAgent;
    }

    /** {@inheritDoc} */
    @Override
    public void actionPerformed(ActionEvent e) {
        final Resource[] resources = appContext.getResources();

        checkState(resources != null && resources.length == 1 && resources[0] instanceof File,
                   "Files only are allowed to be opened in editor");

        editorAgent.openEditor((File)resources[0]);
    }

    /** {@inheritDoc} */
    @Override
    public void updateInPerspective(@NotNull ActionEvent e) {
        final Resource[] resources = appContext.getResources();

        e.getPresentation().setVisible(true);
        e.getPresentation().setEnabled(resources != null && resources.length == 1 && resources[0] instanceof File);
    }
}