/
ResourcesLoaderColorResourcesOverride.java
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/
ResourcesLoaderColorResourcesOverride.java
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/*
* Copyright (C) 2022 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.google.android.material.color;
import com.google.android.material.R;
import android.content.Context;
import android.content.res.Configuration;
import android.os.Build.VERSION_CODES;
import android.view.ContextThemeWrapper;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import java.util.Map;
/**
* The detailed implementation of color resources overriding at runtime with Resources Loader
* implementation.
*/
@RequiresApi(api = VERSION_CODES.R)
class ResourcesLoaderColorResourcesOverride implements ColorResourcesOverride {
private ResourcesLoaderColorResourcesOverride() {}
/**
* Overrides the color resources to the given context, returns {@code true} if new color values
* have been applied.
*
* @param context The target context.
* @param colorResourceIdsToColorValues The mapping from the color resources id to the updated
* color value.
*/
@Override
public boolean applyIfPossible(
Context context, Map<Integer, Integer> colorResourceIdsToColorValues) {
if (ResourcesLoaderUtils.addResourcesLoaderToContext(context, colorResourceIdsToColorValues)) {
ThemeUtils.applyThemeOverlay(context, R.style.ThemeOverlay_Material3_PersonalizedColors);
return true;
}
return false;
}
/**
* Wraps the given Context with the theme overlay where color resources are updated at runtime.
* If not possible, the original Context will be returned.
*
* @param context The target context.
* @param colorResourceIdsToColorValues The mapping from the color resources id to the updated
* color value.
*/
@Override
@NonNull
public Context wrapContextIfPossible(
Context context, Map<Integer, Integer> colorResourceIdsToColorValues) {
ContextThemeWrapper themeWrapper =
new ContextThemeWrapper(context, R.style.ThemeOverlay_Material3_PersonalizedColors);
// Because ContextThemeWrapper does not provide a new set of resources, override config to
// retrieve the new set of resources and to keep the original context's resources intact.
themeWrapper.applyOverrideConfiguration(new Configuration());
return ResourcesLoaderUtils.addResourcesLoaderToContext(
themeWrapper, colorResourceIdsToColorValues)
? themeWrapper
: context;
}
static ColorResourcesOverride getInstance() {
return ResourcesLoaderColorResourcesOverrideSingleton.INSTANCE;
}
private static class ResourcesLoaderColorResourcesOverrideSingleton {
private static final ResourcesLoaderColorResourcesOverride INSTANCE =
new ResourcesLoaderColorResourcesOverride();
}
}