Package org.eclipse.ui.internal.cheatsheets.handlers

Source Code of org.eclipse.ui.internal.cheatsheets.handlers.OpenCheatSheetHandler

/*******************************************************************************
* 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
*******************************************************************************/
package org.eclipse.ui.internal.cheatsheets.handlers;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.ui.cheatsheets.OpenCheatSheetAction;
import org.eclipse.ui.internal.cheatsheets.actions.CheatSheetCategoryBasedSelectionAction;

/**
* Opens the cheatsheet identified by the parameter, or if no parameter is given
* opens the dialog that allows the user to choose a cheatsheet.
*
* @since 3.2
*/
public class OpenCheatSheetHandler extends AbstractHandler {

  private static final String PARAM_ID_CHEAT_SHEET_ID = "cheatSheetId"; //$NON-NLS-1$

  public Object execute(ExecutionEvent event) throws ExecutionException {

    String cheatSheetId = event.getParameter(PARAM_ID_CHEAT_SHEET_ID);

    if (cheatSheetId == null) {
      CheatSheetCategoryBasedSelectionAction action = new CheatSheetCategoryBasedSelectionAction();
      action.run();
    } else {
      OpenCheatSheetAction action = new OpenCheatSheetAction(cheatSheetId);
      action.run();
    }

    return null;
  }

}
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