1 /*
2  * Copyright (C) 2010 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 com.android.layoutlib.bridge;
18 
19 import com.android.ide.common.rendering.api.RenderSession;
20 import com.android.ide.common.rendering.api.ResourceReference;
21 import com.android.ide.common.rendering.api.ResourceValue;
22 import com.android.ide.common.rendering.api.Result;
23 import com.android.ide.common.rendering.api.ViewInfo;
24 import com.android.layoutlib.bridge.impl.RenderSessionImpl;
25 import com.android.tools.layoutlib.java.System_Delegate;
26 
27 import android.annotation.NonNull;
28 import android.annotation.Nullable;
29 
30 import java.awt.image.BufferedImage;
31 import java.util.Collections;
32 import java.util.List;
33 import java.util.Map;
34 
35 /**
36  * An implementation of {@link RenderSession}.
37  *
38  * This is a pretty basic class that does almost nothing. All of the work is done in
39  * {@link RenderSessionImpl}.
40  *
41  */
42 public class BridgeRenderSession extends RenderSession {
43 
44     @Nullable
45     private final RenderSessionImpl mSession;
46     @NonNull
47     private Result mLastResult;
48 
49     @Override
getResult()50     public Result getResult() {
51         return mLastResult;
52     }
53 
54     @Override
getImage()55     public BufferedImage getImage() {
56         return mSession != null ? mSession.getImage() :
57                 new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
58     }
59 
60     @Override
getRootViews()61     public List<ViewInfo> getRootViews() {
62         return mSession != null ? mSession.getViewInfos() : Collections.emptyList();
63     }
64 
65     @Override
getSystemRootViews()66     public List<ViewInfo> getSystemRootViews() {
67         return mSession != null ? mSession.getSystemViewInfos() : Collections.emptyList();
68     }
69 
70     @Override
getDefaultNamespacedProperties()71     public Map<Object, Map<ResourceReference, ResourceValue>> getDefaultNamespacedProperties() {
72         return mSession != null ? mSession.getDefaultNamespacedProperties() :
73                 Collections.emptyMap();
74     }
75 
76     @Override
getDefaultNamespacedStyles()77     public Map<Object, ResourceReference> getDefaultNamespacedStyles() {
78         return mSession != null ? mSession.getDefaultNamespacedStyles() : Collections.emptyMap();
79     }
80 
81     @Override
measure(long timeout)82     public Result measure(long timeout) {
83         if (mSession != null) {
84             try {
85                 Bridge.prepareThread();
86                 mLastResult = mSession.acquire(timeout);
87                 if (mLastResult.isSuccess()) {
88                     mSession.invalidateRenderingSize();
89                     mLastResult = mSession.measure();
90                 }
91             } finally {
92                 mSession.release();
93                 Bridge.cleanupThread();
94             }
95         }
96 
97         return mLastResult;
98     }
99 
100     @Override
render(long timeout, boolean forceMeasure)101     public Result render(long timeout, boolean forceMeasure) {
102         if (mSession != null) {
103             try {
104                 Bridge.prepareThread();
105                 mLastResult = mSession.acquire(timeout);
106                 if (mLastResult.isSuccess()) {
107                     if (forceMeasure) {
108                         mSession.invalidateRenderingSize();
109                     }
110                     mLastResult = mSession.render(false /*freshRender*/);
111                 }
112             } finally {
113                 mSession.release();
114                 Bridge.cleanupThread();
115             }
116         }
117 
118         return mLastResult;
119     }
120 
121     @Override
setSystemTimeNanos(long nanos)122     public void setSystemTimeNanos(long nanos) {
123         System_Delegate.setNanosTime(nanos);
124     }
125 
126     @Override
setSystemBootTimeNanos(long nanos)127     public void setSystemBootTimeNanos(long nanos) {
128         System_Delegate.setBootTimeNanos(nanos);
129     }
130 
131     @Override
setElapsedFrameTimeNanos(long nanos)132     public void setElapsedFrameTimeNanos(long nanos) {
133         if (mSession != null) {
134             mSession.setElapsedFrameTimeNanos(nanos);
135         }
136     }
137 
138     @Override
dispose()139     public void dispose() {
140         if (mSession != null) {
141             mSession.dispose();
142         }
143     }
144 
BridgeRenderSession(@ullable RenderSessionImpl scene, @NonNull Result lastResult)145     /*package*/ BridgeRenderSession(@Nullable RenderSessionImpl scene, @NonNull Result lastResult) {
146         mSession = scene;
147         if (scene != null) {
148             mSession.setScene(this);
149         }
150         mLastResult = lastResult;
151     }
152 
153     @Override
getValidationData()154     public Object getValidationData() {
155         if (mSession != null) {
156             return mSession.getValidatorResult();
157         }
158         return null;
159     }
160 }
161