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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Eclipse Public License, Version 1.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.eclipse.org/org/documents/epl-v10.php
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.ide.common.layout;
     18 
     19 import com.android.ide.common.api.IMenuCallback;
     20 import com.android.ide.common.api.INode;
     21 import com.android.ide.common.api.INodeHandler;
     22 import com.android.ide.common.api.RuleAction;
     23 
     24 import java.util.List;
     25 
     26 /**
     27  * Convenience implementation of {@link IMenuCallback} which can be used to set a
     28  * particular property to the new valueId or newValue passed from the {@link IMenuCallback}
     29  */
     30 public class PropertyCallback implements IMenuCallback {
     31     private final List<? extends INode> mTargetNodes;
     32     private final String mUndoLabel;
     33     private final String mUri;
     34     private final String mAttribute;
     35 
     36     /**
     37      * Creates a new property callback.
     38      *
     39      * @param targetNodes the nodes to apply the property to, or null to use the
     40      *            nodes pass into the
     41      *            {@link #action(RuleAction, List, String, Boolean)} method.
     42      * @param undoLabel the label to use for the undo action
     43      * @param uri the attribute URI to apply
     44      * @param attribute the attribute name to apply
     45      */
     46     public PropertyCallback(List<? extends INode> targetNodes, String undoLabel,
     47             String uri, String attribute) {
     48         super();
     49         mTargetNodes = targetNodes;
     50         mUndoLabel = undoLabel;
     51         mUri = uri;
     52         mAttribute = attribute;
     53     }
     54 
     55     // ---- Implements IMenuCallback ----
     56     public void action(RuleAction action, List<? extends INode> selectedNodes,
     57             final String valueId, final Boolean newValue) {
     58         if (mTargetNodes != null && mTargetNodes.size() > 0) {
     59             selectedNodes = mTargetNodes;
     60         }
     61         if (selectedNodes == null || selectedNodes.size() == 0) {
     62             return;
     63         }
     64         final List<? extends INode> nodes = selectedNodes;
     65         selectedNodes.get(0).editXml(mUndoLabel, new INodeHandler() {
     66             public void handle(INode n) {
     67                 for (INode targetNode : nodes) {
     68                     if (valueId != null) {
     69                         targetNode.setAttribute(mUri, mAttribute, valueId);
     70                     } else {
     71                         assert newValue != null;
     72                         targetNode.setAttribute(mUri, mAttribute, Boolean.toString(newValue));
     73                     }
     74                 }
     75             }
     76         });
     77     }
     78 }
     79