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1/*
2 * Copyright (C) 2014 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
17package com.android.layoutlib.bridge.intensive.setup;
18
19import com.android.SdkConstants;
20import com.android.ide.common.rendering.api.ActionBarCallback;
21import com.android.ide.common.rendering.api.AdapterBinding;
22import com.android.ide.common.rendering.api.ILayoutPullParser;
23import com.android.ide.common.rendering.api.LayoutlibCallback;
24import com.android.ide.common.rendering.api.ParserFactory;
25import com.android.ide.common.rendering.api.ResourceReference;
26import com.android.ide.common.rendering.api.ResourceValue;
27import com.android.ide.common.rendering.api.SessionParams.Key;
28import com.android.ide.common.resources.IntArrayWrapper;
29import com.android.layoutlib.bridge.android.RenderParamsFlags;
30import com.android.resources.ResourceType;
31import com.android.util.Pair;
32import com.android.utils.ILogger;
33
34import org.kxml2.io.KXmlParser;
35import org.xmlpull.v1.XmlPullParser;
36import org.xmlpull.v1.XmlPullParserException;
37
38import android.annotation.NonNull;
39import android.annotation.Nullable;
40
41import java.io.File;
42import java.lang.reflect.Constructor;
43import java.lang.reflect.Field;
44import java.lang.reflect.Modifier;
45import java.util.Map;
46
47import com.google.android.collect.Maps;
48
49import static org.junit.Assert.fail;
50
51@SuppressWarnings("deprecation") // For Pair
52public class LayoutLibTestCallback extends LayoutlibCallback {
53
54    private static final String PROJECT_CLASSES_LOCATION = "/testApp/MyApplication/build/intermediates/classes/debug/";
55    private static final String PACKAGE_NAME = "com.android.layoutlib.test.myapplication";
56
57    private final Map<Integer, Pair<ResourceType, String>> mProjectResources = Maps.newHashMap();
58    private final Map<IntArrayWrapper, String> mStyleableValueToNameMap = Maps.newHashMap();
59    private final Map<ResourceType, Map<String, Integer>> mResources = Maps.newHashMap();
60    private final ILogger mLog;
61    private final ActionBarCallback mActionBarCallback = new ActionBarCallback();
62    private final ClassLoader mModuleClassLoader = new ModuleClassLoader(PROJECT_CLASSES_LOCATION);
63
64    public LayoutLibTestCallback(ILogger logger) {
65        mLog = logger;
66    }
67
68    public void initResources() throws ClassNotFoundException {
69        Class<?> rClass = mModuleClassLoader.loadClass(PACKAGE_NAME + ".R");
70        Class<?>[] nestedClasses = rClass.getDeclaredClasses();
71        for (Class<?> resClass : nestedClasses) {
72            final ResourceType resType = ResourceType.getEnum(resClass.getSimpleName());
73
74            if (resType != null) {
75                final Map<String, Integer> resName2Id = Maps.newHashMap();
76                mResources.put(resType, resName2Id);
77
78                for (Field field : resClass.getDeclaredFields()) {
79                    final int modifiers = field.getModifiers();
80                    if (Modifier.isStatic(modifiers)) { // May not be final in library projects
81                        final Class<?> type = field.getType();
82                        try {
83                            if (type.isArray() && type.getComponentType() == int.class) {
84                                mStyleableValueToNameMap.put(
85                                        new IntArrayWrapper((int[]) field.get(null)),
86                                        field.getName());
87                            } else if (type == int.class) {
88                                final Integer value = (Integer) field.get(null);
89                                mProjectResources.put(value, Pair.of(resType, field.getName()));
90                                resName2Id.put(field.getName(), value);
91                            } else {
92                                mLog.error(null, "Unknown field type in R class: %1$s", type);
93                            }
94                        } catch (IllegalAccessException ignored) {
95                            mLog.error(ignored, "Malformed R class: %1$s", PACKAGE_NAME + ".R");
96                        }
97                    }
98                }
99            }
100        }
101    }
102
103
104    @Override
105    public Object loadView(String name, Class[] constructorSignature, Object[] constructorArgs)
106            throws Exception {
107        Class<?> viewClass = mModuleClassLoader.loadClass(name);
108        Constructor<?> viewConstructor = viewClass.getConstructor(constructorSignature);
109        viewConstructor.setAccessible(true);
110        return viewConstructor.newInstance(constructorArgs);
111    }
112
113    @Override
114    public String getNamespace() {
115        return String.format(SdkConstants.NS_CUSTOM_RESOURCES_S,
116                PACKAGE_NAME);
117    }
118
119    @Override
120    public Pair<ResourceType, String> resolveResourceId(int id) {
121        return mProjectResources.get(id);
122    }
123
124    @Override
125    public String resolveResourceId(int[] id) {
126        return mStyleableValueToNameMap.get(new IntArrayWrapper(id));
127    }
128
129    @Override
130    public Integer getResourceId(ResourceType type, String name) {
131        return mResources.get(type).get(name);
132    }
133
134    @Override
135    public ILayoutPullParser getParser(String layoutName) {
136        fail("This method shouldn't be called by this version of LayoutLib.");
137        return null;
138    }
139
140    @Override
141    public ILayoutPullParser getParser(ResourceValue layoutResource) {
142        return new LayoutPullParser(new File(layoutResource.getValue()));
143    }
144
145    @Override
146    public Object getAdapterItemValue(ResourceReference adapterView, Object adapterCookie,
147            ResourceReference itemRef, int fullPosition, int positionPerType,
148            int fullParentPosition, int parentPositionPerType, ResourceReference viewRef,
149            ViewAttribute viewAttribute, Object defaultValue) {
150        return null;
151    }
152
153    @Override
154    public AdapterBinding getAdapterBinding(ResourceReference adapterViewRef, Object adapterCookie,
155            Object viewObject) {
156        return null;
157    }
158
159    @Override
160    public ActionBarCallback getActionBarCallback() {
161        return mActionBarCallback;
162    }
163
164    @Override
165    public boolean supports(int ideFeature) {
166        return false;
167    }
168
169    @NonNull
170    @Override
171    public ParserFactory getParserFactory() {
172        return new ParserFactory() {
173            @NonNull
174            @Override
175            public XmlPullParser createParser(@Nullable String debugName)
176                    throws XmlPullParserException {
177                return new KXmlParser();
178            }
179        };
180    }
181
182    @Override
183    public <T> T getFlag(Key<T> key) {
184        if (key.equals(RenderParamsFlags.FLAG_KEY_APPLICATION_PACKAGE)) {
185            return (T) PACKAGE_NAME;
186        }
187        return null;
188    }
189}
190