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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
      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 android.util;
     18 
     19 import com.android.ide.common.rendering.api.RenderResources;
     20 import com.android.ide.common.rendering.api.ResourceValue;
     21 import com.android.layoutlib.bridge.Bridge;
     22 import com.android.layoutlib.bridge.BridgeConstants;
     23 import com.android.layoutlib.bridge.android.BridgeContext;
     24 import com.android.resources.ResourceType;
     25 
     26 import org.xmlpull.v1.XmlPullParser;
     27 
     28 import android.util.AttributeSet;
     29 import android.util.XmlPullAttributes;
     30 
     31 /**
     32  * A correct implementation of the {@link AttributeSet} interface on top of a XmlPullParser
     33  */
     34 public class BridgeXmlPullAttributes extends XmlPullAttributes {
     35 
     36     private final BridgeContext mContext;
     37     private final boolean mPlatformFile;
     38 
     39     public BridgeXmlPullAttributes(XmlPullParser parser, BridgeContext context,
     40             boolean platformFile) {
     41         super(parser);
     42         mContext = context;
     43         mPlatformFile = platformFile;
     44     }
     45 
     46     /*
     47      * (non-Javadoc)
     48      * @see android.util.XmlPullAttributes#getAttributeNameResource(int)
     49      *
     50      * This methods must return com.android.internal.R.attr.<name> matching
     51      * the name of the attribute.
     52      * It returns 0 if it doesn't find anything.
     53      */
     54     @Override
     55     public int getAttributeNameResource(int index) {
     56         // get the attribute name.
     57         String name = getAttributeName(index);
     58 
     59         // get the attribute namespace
     60         String ns = mParser.getAttributeNamespace(index);
     61 
     62         if (BridgeConstants.NS_RESOURCES.equals(ns)) {
     63             Integer v = Bridge.getResourceId(ResourceType.ATTR, name);
     64             if (v != null) {
     65                 return v.intValue();
     66             }
     67 
     68             return 0;
     69         }
     70 
     71         // this is not an attribute in the android namespace, we query the customviewloader, if
     72         // the namespaces match.
     73         if (mContext.getProjectCallback().getNamespace().equals(ns)) {
     74             Integer v = mContext.getProjectCallback().getResourceId(ResourceType.ATTR, name);
     75             if (v != null) {
     76                 return v.intValue();
     77             }
     78         }
     79 
     80         return 0;
     81     }
     82 
     83     /*
     84      * (non-Javadoc)
     85      * @see android.util.XmlPullAttributes#getAttributeResourceValue(int, int)
     86      */
     87     @Override
     88     public int getAttributeResourceValue(int index, int defaultValue) {
     89         String value = getAttributeValue(index);
     90 
     91         return resolveResourceValue(value, defaultValue);
     92     }
     93 
     94     /*
     95      * (non-Javadoc)
     96      * @see android.util.XmlPullAttributes#getAttributeResourceValue(java.lang.String, java.lang.String, int)
     97      */
     98     @Override
     99     public int getAttributeResourceValue(String namespace, String attribute, int defaultValue) {
    100         String value = getAttributeValue(namespace, attribute);
    101 
    102         return resolveResourceValue(value, defaultValue);
    103     }
    104 
    105     private int resolveResourceValue(String value, int defaultValue) {
    106         // now look for this particular value
    107         RenderResources resources = mContext.getRenderResources();
    108         ResourceValue resource = resources.resolveResValue(
    109                 resources.findResValue(value, mPlatformFile));
    110 
    111         if (resource != null) {
    112             Integer id = null;
    113             if (mPlatformFile || resource.isFramework()) {
    114                 id = Bridge.getResourceId(resource.getResourceType(), resource.getName());
    115             } else {
    116                 id = mContext.getProjectCallback().getResourceId(
    117                         resource.getResourceType(), resource.getName());
    118             }
    119 
    120             if (id != null) {
    121                 return id;
    122             }
    123         }
    124 
    125         return defaultValue;
    126     }
    127 
    128 }
    129