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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.annotations.NonNull;
     20 import com.android.annotations.Nullable;
     21 import com.android.ide.common.api.IMenuCallback;
     22 import com.android.ide.common.api.INode;
     23 import com.android.ide.common.api.INodeHandler;
     24 import com.android.ide.common.api.RuleAction;
     25 
     26 import java.util.List;
     27 
     28 /**
     29  * Convenience implementation of {@link IMenuCallback} which can be used to set a
     30  * particular property to the new valueId or newValue passed from the {@link IMenuCallback}
     31  */
     32 public class PropertyCallback implements IMenuCallback {
     33     private final List<? extends INode> mTargetNodes;
     34     private final String mUndoLabel;
     35     private final String mUri;
     36     private final String mAttribute;
     37 
     38     /**
     39      * Creates a new property callback.
     40      *
     41      * @param targetNodes the nodes to apply the property to, or null to use the
     42      *            nodes pass into the
     43      *            {@link #action(RuleAction, List, String, Boolean)} method.
     44      * @param undoLabel the label to use for the undo action
     45      * @param uri the attribute URI to apply
     46      * @param attribute the attribute name to apply
     47      */
     48     public PropertyCallback(List<? extends INode> targetNodes, String undoLabel,
     49             String uri, String attribute) {
     50         super();
     51         mTargetNodes = targetNodes;
     52         mUndoLabel = undoLabel;
     53         mUri = uri;
     54         mAttribute = attribute;
     55     }
     56 
     57     // ---- Implements IMenuCallback ----
     58     @Override
     59     public void action(@NonNull RuleAction action, @NonNull List<? extends INode> selectedNodes,
     60             final @Nullable String valueId, final @Nullable Boolean newValue) {
     61         if (mTargetNodes != null && mTargetNodes.size() > 0) {
     62             selectedNodes = mTargetNodes;
     63         }
     64         if (selectedNodes == null || selectedNodes.size() == 0) {
     65             return;
     66         }
     67         final List<? extends INode> nodes = selectedNodes;
     68         selectedNodes.get(0).editXml(mUndoLabel, new INodeHandler() {
     69             @Override
     70             public void handle(@NonNull INode n) {
     71                 for (INode targetNode : nodes) {
     72                     if (valueId != null) {
     73                         targetNode.setAttribute(mUri, mAttribute, valueId);
     74                     } else {
     75                         assert newValue != null;
     76                         targetNode.setAttribute(mUri, mAttribute, Boolean.toString(newValue));
     77                     }
     78                 }
     79             }
     80         });
     81     }
     82 }
     83