1 /*
2  * Copyright (C) 2007 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.eclipse.adt.internal.editors.descriptors;
18 
19 import static com.android.SdkConstants.XMLNS;
20 import static com.android.SdkConstants.XMLNS_URI;
21 
22 import com.android.ide.eclipse.adt.internal.editors.uimodel.UiAttributeNode;
23 import com.android.ide.eclipse.adt.internal.editors.uimodel.UiElementNode;
24 
25 
26 /**
27  * Describes an XMLNS attribute that is hidden.
28  * <p/>
29  * Such an attribute has no user interface and no corresponding {@link UiAttributeNode}.
30  * It also has a single constant default value.
31  * <p/>
32  * When loading an XML, we'll ignore this attribute.
33  * However when writing a new XML, we should always write this attribute.
34  * <p/>
35  * Currently this is used for the xmlns:android attribute in the manifest element.
36  */
37 public final class XmlnsAttributeDescriptor extends AttributeDescriptor {
38 
39     private String mValue;
40 
XmlnsAttributeDescriptor(String defaultPrefix, String value)41     public XmlnsAttributeDescriptor(String defaultPrefix, String value) {
42         super(defaultPrefix, XMLNS_URI, null /* info */);
43         mValue = value;
44     }
45 
46     /**
47      * Returns the value of this specialized attribute descriptor, which is the URI associated
48      * to the declared namespace prefix.
49      */
getValue()50     public String getValue() {
51         return mValue;
52     }
53 
54     /**
55      * Returns the "xmlns" prefix that is always used by this node for its namespace URI.
56      * This is defined by the XML specification.
57      */
getXmlNsPrefix()58     public String getXmlNsPrefix() {
59         return XMLNS;
60     }
61 
62     /**
63      * Returns the fully-qualified attribute name, namely "xmlns:xxx" where xxx is
64      * the defaultPrefix passed in the constructor.
65      */
getXmlNsName()66     public String getXmlNsName() {
67         return getXmlNsPrefix() + ":" + getXmlLocalName(); //$NON-NLS-1$
68     }
69 
70     /**
71      * @return Always returns null. {@link XmlnsAttributeDescriptor} has no user interface.
72      */
73     @Override
createUiNode(UiElementNode uiParent)74     public UiAttributeNode createUiNode(UiElementNode uiParent) {
75         return null;
76     }
77 }
78