| /******************************************************************************* |
| * Copyright (c) 2006 Sybase, Inc. 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: |
| * Sybase, Inc. - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jst.pagedesigner.commands.single; |
| |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import org.eclipse.wst.xml.core.internal.provisional.document.IDOMElement; |
| |
| /** |
| * This command is for change an single attribute of an IDOMElement. Normally |
| * used by the properties view. |
| * |
| * @author mengbo |
| */ |
| public class ChangeAttributeCommand extends SingleNodeCommand { |
| private IDOMElement _element; |
| |
| private String _attrValue; |
| |
| private String _attrName; |
| |
| private Map _attributes; |
| |
| private boolean _keepEmptyAttribute = false; |
| |
| /** |
| * |
| * @param label |
| * @param node |
| * @param attrName |
| * @param attrValue |
| * if null means remove the specified attribute |
| */ |
| public ChangeAttributeCommand(String label, IDOMElement node, |
| String attrName, String attrValue) { |
| super(label, node); |
| _element = node; |
| _attrName = attrName; |
| _attrValue = attrValue; |
| _attributes = null; |
| } |
| |
| /** TODO: can these two constructors be merged? |
| * @param label |
| * @param node |
| * @param attributes |
| */ |
| public ChangeAttributeCommand(String label, IDOMElement node, Map attributes) { |
| super(label, node); |
| _element = node; |
| _attributes = attributes; |
| _attrName = null; |
| _attrValue = null; |
| } |
| |
| protected void doExecute() { |
| if (_attrName != null) { |
| updateElement(_attrName, _attrValue); |
| } else if (_attributes != null) { |
| for (Iterator iterator = _attributes.keySet().iterator(); iterator |
| .hasNext();) { |
| String name = (String) iterator.next(); |
| String value = (String) _attributes.get(name); |
| if (isSameValue(value, _element.getAttribute(name))) { |
| continue; |
| } |
| updateElement(name, value); |
| } |
| } |
| } |
| |
| private void updateElement(String name, String value) { |
| if (_element.hasAttribute(name) && isEmptyString(value) |
| && !_keepEmptyAttribute) { |
| _element.removeAttribute(name); |
| } |
| if (!isEmptyString(value) || _keepEmptyAttribute) { |
| _element.setAttribute(name, value); |
| } |
| } |
| |
| private boolean isSameValue(String value1, String value2) { |
| value1 = value1 == null ? "" : value1; //$NON-NLS-1$ |
| value2 = value2 == null ? "" : value2; //$NON-NLS-1$ |
| return value1.equals(value2); |
| } |
| |
| private boolean isEmptyString(String str) { |
| if (str == null || str.equals("")) { //$NON-NLS-1$ |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * @return Returns the keepEmptyAttribute. |
| */ |
| public boolean isKeepEmptyAttribute() { |
| return _keepEmptyAttribute; |
| } |
| |
| /** |
| * @param keepEmptyAttribute |
| * The keepEmptyAttribute to set. |
| */ |
| public void setKeepEmptyAttribute(boolean keepEmptyAttribute) { |
| this._keepEmptyAttribute = keepEmptyAttribute; |
| } |
| } |