com.ibm.research.tours.content.actions.PickRegionActionDelegate.java Source code

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Here is the source code for com.ibm.research.tours.content.actions.PickRegionActionDelegate.java

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/*******************************************************************************
 * Copyright (c) 2006-2007 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *     IBM Research
 *******************************************************************************/
package com.ibm.research.tours.content.actions;

import org.eclipse.jdt.internal.ui.javaeditor.IClassFileEditorInput;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.text.Region;
import org.eclipse.jface.text.TextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.texteditor.ITextEditor;

import com.ibm.research.tours.content.TextRegion;
import com.ibm.research.tours.content.ToursContentPlugin;

public class PickRegionActionDelegate implements IObjectActionDelegate {
    private IWorkbenchPart fTargetPart;
    private ISelection fSelection;
    private TextSelection fTextSelection;

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

    public void run(IAction action) {
        if (fTargetPart instanceof ITextEditor) {
            IStructuredSelection structuredSelection = (IStructuredSelection) fSelection;
            Object[] selection = structuredSelection.toArray();
            Object file = null;

            if (selection[0] instanceof IFileEditorInput) {
                IFileEditorInput input = (IFileEditorInput) selection[0];
                file = input.getFile();
            } else if (selection[0] instanceof IClassFileEditorInput) {
                IClassFileEditorInput input = (IClassFileEditorInput) selection[0];
                file = input.getClassFile();
            }

            if (file != null) {
                Region region = new Region(fTextSelection.getOffset(), fTextSelection.getLength());
                ToursContentPlugin.getDefault().getTextRegionClipBoard()
                        .putTextRegion(new TextRegion(file, region));
            }
        }
    }

    public void selectionChanged(IAction action, ISelection selection) {
        fSelection = selection;

        if (fTargetPart instanceof ITextEditor) {
            ITextEditor editor = (ITextEditor) fTargetPart;
            fTextSelection = (TextSelection) editor.getSelectionProvider().getSelection();

            if (fTextSelection.getLength() <= 0)
                action.setEnabled(false);
        }
    }
}