Adam Lesinski | 282e181 | 2014-01-23 18:17:42 -0800 | [diff] [blame] | 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.view; |
| 18 | |
| 19 | import com.android.ide.common.rendering.api.IProjectCallback; |
| 20 | import com.android.ide.common.rendering.api.LayoutLog; |
| 21 | import com.android.ide.common.rendering.api.MergeCookie; |
| 22 | import com.android.ide.common.rendering.api.ResourceReference; |
| 23 | import com.android.ide.common.rendering.api.ResourceValue; |
| 24 | import com.android.layoutlib.bridge.Bridge; |
| 25 | import com.android.layoutlib.bridge.android.BridgeContext; |
| 26 | import com.android.layoutlib.bridge.android.BridgeXmlBlockParser; |
| 27 | import com.android.layoutlib.bridge.impl.ParserFactory; |
| 28 | import com.android.resources.ResourceType; |
| 29 | import com.android.util.Pair; |
| 30 | |
| 31 | import org.xmlpull.v1.XmlPullParser; |
| 32 | |
| 33 | import android.content.Context; |
| 34 | import android.util.AttributeSet; |
| 35 | import android.view.InflateException; |
| 36 | import android.view.LayoutInflater; |
| 37 | import android.view.View; |
| 38 | import android.view.ViewGroup; |
| 39 | |
| 40 | import java.io.File; |
| 41 | |
| 42 | /** |
| 43 | * Custom implementation of {@link LayoutInflater} to handle custom views. |
| 44 | */ |
| 45 | public final class BridgeInflater extends LayoutInflater { |
| 46 | |
| 47 | private final IProjectCallback mProjectCallback; |
| 48 | private boolean mIsInMerge = false; |
| 49 | private ResourceReference mResourceReference; |
| 50 | |
| 51 | /** |
| 52 | * List of class prefixes which are tried first by default. |
| 53 | * <p/> |
| 54 | * This should match the list in com.android.internal.policy.impl.PhoneLayoutInflater. |
| 55 | */ |
| 56 | private static final String[] sClassPrefixList = { |
| 57 | "android.widget.", |
| 58 | "android.webkit." |
| 59 | }; |
| 60 | |
| 61 | protected BridgeInflater(LayoutInflater original, Context newContext) { |
| 62 | super(original, newContext); |
| 63 | mProjectCallback = null; |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Instantiate a new BridgeInflater with an {@link IProjectCallback} object. |
| 68 | * |
| 69 | * @param context The Android application context. |
| 70 | * @param projectCallback the {@link IProjectCallback} object. |
| 71 | */ |
| 72 | public BridgeInflater(Context context, IProjectCallback projectCallback) { |
| 73 | super(context); |
| 74 | mProjectCallback = projectCallback; |
| 75 | mConstructorArgs[0] = context; |
| 76 | } |
| 77 | |
| 78 | @Override |
| 79 | public View onCreateView(String name, AttributeSet attrs) throws ClassNotFoundException { |
| 80 | View view = null; |
| 81 | |
| 82 | try { |
| 83 | // First try to find a class using the default Android prefixes |
| 84 | for (String prefix : sClassPrefixList) { |
| 85 | try { |
| 86 | view = createView(name, prefix, attrs); |
| 87 | if (view != null) { |
| 88 | break; |
| 89 | } |
| 90 | } catch (ClassNotFoundException e) { |
| 91 | // Ignore. We'll try again using the base class below. |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | // Next try using the parent loader. This will most likely only work for |
| 96 | // fully-qualified class names. |
| 97 | try { |
| 98 | if (view == null) { |
| 99 | view = super.onCreateView(name, attrs); |
| 100 | } |
| 101 | } catch (ClassNotFoundException e) { |
| 102 | // Ignore. We'll try again using the custom view loader below. |
| 103 | } |
| 104 | |
| 105 | // Finally try again using the custom view loader |
| 106 | try { |
| 107 | if (view == null) { |
| 108 | view = loadCustomView(name, attrs); |
| 109 | } |
| 110 | } catch (ClassNotFoundException e) { |
| 111 | // If the class was not found, we throw the exception directly, because this |
| 112 | // method is already expected to throw it. |
| 113 | throw e; |
| 114 | } |
| 115 | } catch (Exception e) { |
| 116 | // Wrap the real exception in a ClassNotFoundException, so that the calling method |
| 117 | // can deal with it. |
| 118 | ClassNotFoundException exception = new ClassNotFoundException("onCreateView", e); |
| 119 | throw exception; |
| 120 | } |
| 121 | |
| 122 | setupViewInContext(view, attrs); |
| 123 | |
| 124 | return view; |
| 125 | } |
| 126 | |
| 127 | @Override |
Alan Viverette | ebcef6b | 2014-01-08 15:15:01 -0800 | [diff] [blame] | 128 | public View createViewFromTag(View parent, String name, AttributeSet attrs, |
| 129 | boolean inheritContext) { |
Adam Lesinski | 282e181 | 2014-01-23 18:17:42 -0800 | [diff] [blame] | 130 | View view = null; |
| 131 | try { |
Alan Viverette | ebcef6b | 2014-01-08 15:15:01 -0800 | [diff] [blame] | 132 | view = super.createViewFromTag(parent, name, attrs, inheritContext); |
Adam Lesinski | 282e181 | 2014-01-23 18:17:42 -0800 | [diff] [blame] | 133 | } catch (InflateException e) { |
| 134 | // try to load the class from using the custom view loader |
| 135 | try { |
| 136 | view = loadCustomView(name, attrs); |
| 137 | } catch (Exception e2) { |
| 138 | // Wrap the real exception in an InflateException so that the calling |
| 139 | // method can deal with it. |
| 140 | InflateException exception = new InflateException(); |
| 141 | if (e2.getClass().equals(ClassNotFoundException.class) == false) { |
| 142 | exception.initCause(e2); |
| 143 | } else { |
| 144 | exception.initCause(e); |
| 145 | } |
| 146 | throw exception; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | setupViewInContext(view, attrs); |
| 151 | |
| 152 | return view; |
| 153 | } |
| 154 | |
| 155 | @Override |
| 156 | public View inflate(int resource, ViewGroup root) { |
| 157 | Context context = getContext(); |
| 158 | if (context instanceof BridgeContext) { |
| 159 | BridgeContext bridgeContext = (BridgeContext)context; |
| 160 | |
| 161 | ResourceValue value = null; |
| 162 | |
| 163 | Pair<ResourceType, String> layoutInfo = Bridge.resolveResourceId(resource); |
| 164 | if (layoutInfo != null) { |
| 165 | value = bridgeContext.getRenderResources().getFrameworkResource( |
| 166 | ResourceType.LAYOUT, layoutInfo.getSecond()); |
| 167 | } else { |
| 168 | layoutInfo = mProjectCallback.resolveResourceId(resource); |
| 169 | |
| 170 | if (layoutInfo != null) { |
| 171 | value = bridgeContext.getRenderResources().getProjectResource( |
| 172 | ResourceType.LAYOUT, layoutInfo.getSecond()); |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | if (value != null) { |
| 177 | File f = new File(value.getValue()); |
| 178 | if (f.isFile()) { |
| 179 | try { |
| 180 | XmlPullParser parser = ParserFactory.create(f); |
| 181 | |
| 182 | BridgeXmlBlockParser bridgeParser = new BridgeXmlBlockParser( |
| 183 | parser, bridgeContext, false); |
| 184 | |
| 185 | return inflate(bridgeParser, root); |
| 186 | } catch (Exception e) { |
| 187 | Bridge.getLog().error(LayoutLog.TAG_RESOURCES_READ, |
| 188 | "Failed to parse file " + f.getAbsolutePath(), e, null /*data*/); |
| 189 | |
| 190 | return null; |
| 191 | } |
| 192 | } |
| 193 | } |
| 194 | } |
| 195 | return null; |
| 196 | } |
| 197 | |
| 198 | private View loadCustomView(String name, AttributeSet attrs) throws ClassNotFoundException, |
| 199 | Exception{ |
| 200 | if (mProjectCallback != null) { |
| 201 | // first get the classname in case it's not the node name |
| 202 | if (name.equals("view")) { |
| 203 | name = attrs.getAttributeValue(null, "class"); |
| 204 | } |
| 205 | |
| 206 | mConstructorArgs[1] = attrs; |
| 207 | |
| 208 | Object customView = mProjectCallback.loadView(name, mConstructorSignature, |
| 209 | mConstructorArgs); |
| 210 | |
| 211 | if (customView instanceof View) { |
| 212 | return (View)customView; |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | return null; |
| 217 | } |
| 218 | |
| 219 | private void setupViewInContext(View view, AttributeSet attrs) { |
| 220 | if (getContext() instanceof BridgeContext) { |
| 221 | BridgeContext bc = (BridgeContext) getContext(); |
| 222 | if (attrs instanceof BridgeXmlBlockParser) { |
| 223 | BridgeXmlBlockParser parser = (BridgeXmlBlockParser) attrs; |
| 224 | |
| 225 | // get the view key |
| 226 | Object viewKey = parser.getViewCookie(); |
| 227 | |
| 228 | if (viewKey == null) { |
| 229 | int currentDepth = parser.getDepth(); |
| 230 | |
| 231 | // test whether we are in an included file or in a adapter binding view. |
| 232 | BridgeXmlBlockParser previousParser = bc.getPreviousParser(); |
| 233 | if (previousParser != null) { |
| 234 | // looks like we inside an embedded layout. |
| 235 | // only apply the cookie of the calling node (<include>) if we are at the |
| 236 | // top level of the embedded layout. If there is a merge tag, then |
| 237 | // skip it and look for the 2nd level |
| 238 | int testDepth = mIsInMerge ? 2 : 1; |
| 239 | if (currentDepth == testDepth) { |
| 240 | viewKey = previousParser.getViewCookie(); |
| 241 | // if we are in a merge, wrap the cookie in a MergeCookie. |
| 242 | if (viewKey != null && mIsInMerge) { |
| 243 | viewKey = new MergeCookie(viewKey); |
| 244 | } |
| 245 | } |
| 246 | } else if (mResourceReference != null && currentDepth == 1) { |
| 247 | // else if there's a resource reference, this means we are in an adapter |
| 248 | // binding case. Set the resource ref as the view cookie only for the top |
| 249 | // level view. |
| 250 | viewKey = mResourceReference; |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | if (viewKey != null) { |
| 255 | bc.addViewKey(view, viewKey); |
| 256 | } |
| 257 | } |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | public void setIsInMerge(boolean isInMerge) { |
| 262 | mIsInMerge = isInMerge; |
| 263 | } |
| 264 | |
| 265 | public void setResourceReference(ResourceReference reference) { |
| 266 | mResourceReference = reference; |
| 267 | } |
| 268 | |
| 269 | @Override |
| 270 | public LayoutInflater cloneInContext(Context newContext) { |
| 271 | return new BridgeInflater(this, newContext); |
| 272 | } |
| 273 | } |