1 /* 2 * Copyright (C) 2008 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.layout; 18 19 import com.android.SdkConstants; 20 import com.android.ide.common.rendering.api.ILayoutPullParser; 21 import com.android.ide.eclipse.adt.AdtConstants; 22 import com.android.ide.eclipse.adt.internal.editors.layout.descriptors.ViewElementDescriptor; 23 import com.android.layoutlib.api.ILayoutResult.ILayoutViewInfo; 24 25 import org.xmlpull.v1.XmlPullParserException; 26 27 /** 28 * {@link ILayoutPullParser} implementation to render android widget bitmap. 29 * <p/> 30 * The parser emulates a layout that contains just one widget, described by the 31 * {@link ViewElementDescriptor} passed in the constructor. 32 * <p/> 33 * This pull parser generates {@link ILayoutViewInfo}s which key is a {@link ViewElementDescriptor}. 34 */ 35 public class WidgetPullParser extends BasePullParser { 36 37 private final ViewElementDescriptor mDescriptor; 38 private String[][] mAttributes = new String[][] { 39 { "text", null }, 40 { "layout_width", "wrap_content" }, 41 { "layout_height", "wrap_content" }, 42 }; 43 44 public WidgetPullParser(ViewElementDescriptor descriptor) { 45 mDescriptor = descriptor; 46 47 String[] segments = mDescriptor.getFullClassName().split(AdtConstants.RE_DOT); 48 mAttributes[0][1] = segments[segments.length-1]; 49 } 50 51 @Override 52 public Object getViewCookie() { 53 // we need a viewKey or the ILayoutResult will not contain any ILayoutViewInfo 54 return mDescriptor; 55 } 56 57 /** 58 * Legacy method required by {@link com.android.layoutlib.api.IXmlPullParser} 59 */ 60 @Override 61 public Object getViewKey() { 62 return getViewCookie(); 63 } 64 65 @Override 66 public ILayoutPullParser getParser(String layoutName) { 67 // there's no embedded layout for a single widget. 68 return null; 69 } 70 71 @Override 72 public int getAttributeCount() { 73 return mAttributes.length; // text attribute 74 } 75 76 @Override 77 public String getAttributeName(int index) { 78 if (index < mAttributes.length) { 79 return mAttributes[index][0]; 80 } 81 82 return null; 83 } 84 85 @Override 86 public String getAttributeNamespace(int index) { 87 return SdkConstants.NS_RESOURCES; 88 } 89 90 @Override 91 public String getAttributePrefix(int index) { 92 // pass 93 return null; 94 } 95 96 @Override 97 public String getAttributeValue(int index) { 98 if (index < mAttributes.length) { 99 return mAttributes[index][1]; 100 } 101 102 return null; 103 } 104 105 @Override 106 public String getAttributeValue(String ns, String name) { 107 if (SdkConstants.NS_RESOURCES.equals(ns)) { 108 for (String[] attribute : mAttributes) { 109 if (name.equals(attribute[0])) { 110 return attribute[1]; 111 } 112 } 113 } 114 115 return null; 116 } 117 118 @Override 119 public int getDepth() { 120 // pass 121 return 0; 122 } 123 124 @Override 125 public String getName() { 126 return mDescriptor.getXmlLocalName(); 127 } 128 129 @Override 130 public String getNamespace() { 131 // pass 132 return null; 133 } 134 135 @Override 136 public String getPositionDescription() { 137 // pass 138 return null; 139 } 140 141 @Override 142 public String getPrefix() { 143 // pass 144 return null; 145 } 146 147 @Override 148 public boolean isEmptyElementTag() throws XmlPullParserException { 149 if (mParsingState == START_TAG) { 150 return true; 151 } 152 153 throw new XmlPullParserException("Call to isEmptyElementTag while not in START_TAG", 154 this, null); 155 } 156 157 @Override 158 public void onNextFromStartDocument() { 159 // just go to start_tag 160 mParsingState = START_TAG; 161 } 162 163 @Override 164 public void onNextFromStartTag() { 165 // since we have no children, just go to end_tag 166 mParsingState = END_TAG; 167 } 168 169 @Override 170 public void onNextFromEndTag() { 171 // just one tag. we are done. 172 mParsingState = END_DOCUMENT; 173 } 174 } 175
