Select.java

package ch.hsr.ifs.cdttesting.showoffset;

import org.eclipse.jface.text.TextSelection;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.texteditor.ITextEditor;

public class Select implements InputHandler {

	private IWorkbenchWindow window;

	public void run(final IWorkbenchWindow window) {
		this.window = window;
		SelectionDialog dialog = new SelectionDialog(window.getShell(), this);
		dialog.open();
	}

	@Override
	public void setInput(final int from, final int to) {
		boolean editorAreaVisible = window.getActivePage().isEditorAreaVisible();
		IEditorPart activeEditor = window.getActivePage().getActiveEditor();
		if (editorAreaVisible && activeEditor instanceof ITextEditor) {
			ITextEditor editor = (ITextEditor) activeEditor;
			editor.getSelectionProvider().setSelection(new TextSelection(from, to - from));
		}
	}
}