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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.ide.common.layoutlib;
import com.android.layoutlib.api.ILayoutBridge;
import com.android.layoutlib.api.ILayoutResult;
import com.android.layoutlib.api.LayoutBridge;
import com.android.layoutlib.api.LayoutScene;
import com.android.layoutlib.api.SceneParams;
import com.android.layoutlib.api.SceneResult;
import com.android.layoutlib.api.ViewInfo;
import com.android.layoutlib.api.ILayoutResult.ILayoutViewInfo;
import com.android.layoutlib.api.SceneParams.RenderingMode;
import com.android.layoutlib.api.SceneResult.SceneStatus;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Map;
/**
* {@link LayoutBridge} wrapper around a {@link ILayoutBridge}.
* <p/>
* The goal is to let tools only uses the latest API by providing a conversion interface
* between the really old API ({@link ILayoutBridge}) and the new one ({@link ILayoutBridge}).
*
*/
@SuppressWarnings("deprecation")
class LayoutBridgeWrapper extends LayoutBridge {
private final ILayoutBridge mBridge;
private final ClassLoader mClassLoader;
LayoutBridgeWrapper(ILayoutBridge bridge, ClassLoader classLoader) {
mBridge = bridge;
mClassLoader = classLoader;
}
@Override
public int getApiLevel() {
int apiLevel = 1;
try {
apiLevel = mBridge.getApiLevel();
} catch (AbstractMethodError e) {
// the first version of the api did not have this method
// so this is 1
}
return apiLevel;
}
@Override
public boolean init(String fontOsLocation, Map<String, Map<String, Integer>> enumValueMap) {
return mBridge.init(fontOsLocation, enumValueMap);
}
@Override
public boolean dispose() {
// there's no dispose in ILayoutBridge
return true;
}
@Override
public LayoutScene createScene(SceneParams params) {
int apiLevel = mBridge.getApiLevel();
ILayoutResult result = null;
if (apiLevel == 4) {
// Final ILayoutBridge API added support for "render full height"
result = mBridge.computeLayout(
params.getLayoutDescription(), params.getProjectKey(),
params.getScreenWidth(), params.getScreenHeight(),
params.getRenderingMode() == RenderingMode.FULL_EXPAND ? true : false,
params.getDensity(), params.getXdpi(), params.getYdpi(),
params.getThemeName(), params.getIsProjectTheme(),
params.getProjectResources(), params.getFrameworkResources(),
params.getProjectCallback(), params.getLogger());
} else if (apiLevel == 3) {
// api 3 add density support.
result = mBridge.computeLayout(
params.getLayoutDescription(), params.getProjectKey(),
params.getScreenWidth(), params.getScreenHeight(),
params.getDensity(), params.getXdpi(), params.getYdpi(),
params.getThemeName(), params.getIsProjectTheme(),
params.getProjectResources(), params.getFrameworkResources(),
params.getProjectCallback(), params.getLogger());
} else if (apiLevel == 2) {
// api 2 added boolean for separation of project/framework theme
result = mBridge.computeLayout(
params.getLayoutDescription(), params.getProjectKey(),
params.getScreenWidth(), params.getScreenHeight(),
params.getThemeName(), params.getIsProjectTheme(),
params.getProjectResources(), params.getFrameworkResources(),
params.getProjectCallback(), params.getLogger());
} else {
// First api with no density/dpi, and project theme boolean mixed
// into the theme name.
// change the string if it's a custom theme to make sure we can
// differentiate them
String themeName = params.getThemeName();
if (params.getIsProjectTheme()) {
themeName = "*" + themeName; //$NON-NLS-1$
}
result = mBridge.computeLayout(
params.getLayoutDescription(), params.getProjectKey(),
params.getScreenWidth(), params.getScreenHeight(),
themeName,
params.getProjectResources(), params.getFrameworkResources(),
params.getProjectCallback(), params.getLogger());
}
// clean up that is not done by the ILayoutBridge itself
cleanUp();
return convertToScene(result);
}
@Override
public void clearCaches(Object projectKey) {
mBridge.clearCaches(projectKey);
}
/**
* Converts a {@link ILayoutResult} to a {@link LayoutScene}.
*/
private LayoutScene convertToScene(ILayoutResult result) {
SceneResult sceneResult;
ViewInfo rootViewInfo;
if (result.getSuccess() == ILayoutResult.SUCCESS) {
sceneResult = SceneStatus.SUCCESS.getResult();
rootViewInfo = convertToViewInfo(result.getRootView());
} else {
sceneResult = SceneStatus.ERROR_UNKNOWN.getResult(result.getErrorMessage());
rootViewInfo = null;
}
// create a BasicLayoutScene. This will return the given values but return the default
// implementation for all method.
// ADT should gracefully handle the default implementations of LayoutScene
return new BasicLayoutScene(sceneResult, rootViewInfo, result.getImage());
}
/**
* Converts a {@link ILayoutViewInfo} (and its children) to a {@link ViewInfo}.
*/
private ViewInfo convertToViewInfo(ILayoutViewInfo view) {
// create the view info.
ViewInfo viewInfo = new ViewInfo(view.getName(), view.getViewKey(),
view.getLeft(), view.getTop(), view.getRight(), view.getBottom());
// then convert the children
ILayoutViewInfo[] children = view.getChildren();
if (children != null) {
ArrayList<ViewInfo> convertedChildren = new ArrayList<ViewInfo>(children.length);
for (ILayoutViewInfo child : children) {
convertedChildren.add(convertToViewInfo(child));
}
viewInfo.setChildren(convertedChildren);
}
return viewInfo;
}
/**
* Post rendering clean-up that must be done here because it's not done in any layoutlib using
* {@link ILayoutBridge}.
*/
private void cleanUp() {
try {
Class<?> looperClass = mClassLoader.loadClass("android.os.Looper"); //$NON-NLS-1$
Field threadLocalField = looperClass.getField("sThreadLocal"); //$NON-NLS-1$
if (threadLocalField != null) {
threadLocalField.setAccessible(true);
// get object. Field is static so no need to pass an object
ThreadLocal<?> threadLocal = (ThreadLocal<?>) threadLocalField.get(null);
if (threadLocal != null) {
threadLocal.remove();
}
}
} catch (Exception e) {
// do nothing.
}
}
}
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