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      1 /*
      2  * Copyright (C) 2012 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;
     18 
     19 import static com.android.SdkConstants.ANDROID_URI;
     20 import static com.android.SdkConstants.ATTR_ID;
     21 import static com.android.SdkConstants.ATTR_LAYOUT;
     22 import static com.android.SdkConstants.ATTR_NAME;
     23 import static com.android.SdkConstants.ATTR_SRC;
     24 import static com.android.SdkConstants.ATTR_TEXT;
     25 import static com.android.SdkConstants.DRAWABLE_PREFIX;
     26 import static com.android.SdkConstants.LAYOUT_RESOURCE_PREFIX;
     27 import static com.android.SdkConstants.VIEW;
     28 import static com.android.SdkConstants.VIEW_TAG;
     29 
     30 import org.eclipse.swt.graphics.Image;
     31 import org.eclipse.wst.xml.ui.internal.contentoutline.JFaceNodeLabelProvider;
     32 import org.w3c.dom.DOMException;
     33 import org.w3c.dom.Element;
     34 
     35 /**
     36  * Label provider for the XML outlines and quick outlines: Use our own icons,
     37  * when available, and and include the most important attribute (id, name, or
     38  * text)
     39  */
     40 @SuppressWarnings("restriction")
     41 // XML UI API
     42 class OutlineLabelProvider extends JFaceNodeLabelProvider {
     43     @Override
     44     public Image getImage(Object element) {
     45         if (element instanceof Element) {
     46             Element e = (Element) element;
     47             String tagName = e.getTagName();
     48             if (VIEW_TAG.equals(tagName)) {
     49                 // Can't have both view.png and View.png; issues on case sensitive vs
     50                 // case insensitive file systems
     51                 tagName = VIEW;
     52             }
     53             IconFactory factory = IconFactory.getInstance();
     54             Image img = factory.getIcon(tagName, null);
     55             if (img != null) {
     56                 return img;
     57             }
     58         }
     59         return super.getImage(element);
     60     }
     61 
     62     @Override
     63     public String getText(Object element) {
     64         String text = super.getText(element);
     65         if (element instanceof Element) {
     66             Element e = (Element) element;
     67             String id = getAttributeNS(e, ANDROID_URI, ATTR_ID);
     68             if (id == null || id.length() == 0) {
     69                 id = getAttributeNS(e, ANDROID_URI, ATTR_NAME);
     70                 if (id == null || id.length() == 0) {
     71                     id = e.getAttribute(ATTR_NAME);
     72                     if (id == null || id.length() == 0) {
     73                         id = getAttributeNS(e, ANDROID_URI, ATTR_TEXT);
     74                         if (id != null && id.length() > 15) {
     75                             id = id.substring(0, 12) + "...";
     76                         }
     77                         if (id == null || id.length() == 0) {
     78                             id = getAttributeNS(e, ANDROID_URI, ATTR_SRC);
     79                             if (id != null && id.length() > 0) {
     80                                 if (id.startsWith(DRAWABLE_PREFIX)) {
     81                                     id = id.substring(DRAWABLE_PREFIX.length());
     82                                 }
     83                             } else {
     84                                 id = e.getAttribute(ATTR_LAYOUT);
     85                                 if (id != null && id.length() > 0) {
     86                                     if (id.startsWith(LAYOUT_RESOURCE_PREFIX)) {
     87                                         id = id.substring(LAYOUT_RESOURCE_PREFIX.length());
     88                                     }
     89                                 }
     90                             }
     91                         }
     92                     }
     93                 }
     94             }
     95             if (id != null && id.length() > 0) {
     96                 return text + ": " + id; //$NON-NLS-1$
     97             }
     98         }
     99         return text;
    100     }
    101 
    102     /**
    103      * Wrapper around {@link Element#getAttributeNS(String, String)}.
    104      * <p/>
    105      * The implementation used in Eclipse's XML editor sometimes internally
    106      * throws an NPE instead of politely returning null.
    107      *
    108      * @see Element#getAttributeNS(String, String)
    109      */
    110     private String getAttributeNS(Element e, String uri, String name) throws DOMException {
    111         try {
    112             return e.getAttributeNS(uri, name);
    113         } catch (NullPointerException ignore) {
    114             return null;
    115         }
    116     }
    117 }
    118