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/*
* Copyright (C) 2018 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.launcher3.uioverrides;
import android.content.Context;
import android.graphics.Color;
import android.util.Pair;
import com.android.launcher3.uioverrides.dynamicui.WallpaperColorsCompat;
import com.android.launcher3.uioverrides.dynamicui.WallpaperManagerCompat;
import com.android.launcher3.uioverrides.dynamicui.ColorExtractionAlgorithm;
import java.util.ArrayList;
import static android.app.WallpaperManager.FLAG_SYSTEM;
public class WallpaperColorInfo implements WallpaperManagerCompat.OnColorsChangedListenerCompat {
private static final int FALLBACK_COLOR = Color.WHITE;
private static final Object sInstanceLock = new Object();
private static WallpaperColorInfo sInstance;
public static WallpaperColorInfo getInstance(Context context) {
synchronized (sInstanceLock) {
if (sInstance == null) {
sInstance = new WallpaperColorInfo(context.getApplicationContext());
}
return sInstance;
}
}
private final ArrayList<OnChangeListener> mListeners = new ArrayList<>();
private final WallpaperManagerCompat mWallpaperManager;
private final ColorExtractionAlgorithm mExtractionType;
private int mMainColor;
private int mSecondaryColor;
private boolean mIsDark;
private boolean mSupportsDarkText;
private OnChangeListener[] mTempListeners;
private WallpaperColorInfo(Context context) {
mWallpaperManager = WallpaperManagerCompat.getInstance(context);
mWallpaperManager.addOnColorsChangedListener(this);
mExtractionType = new ColorExtractionAlgorithm();
update(mWallpaperManager.getWallpaperColors(FLAG_SYSTEM));
}
public int getMainColor() {
return mMainColor;
}
public int getSecondaryColor() {
return mSecondaryColor;
}
public boolean isDark() {
return mIsDark;
}
public boolean supportsDarkText() {
return mSupportsDarkText;
}
@Override
public void onColorsChanged(WallpaperColorsCompat colors, int which) {
if ((which & FLAG_SYSTEM) != 0) {
update(colors);
notifyChange();
}
}
private void update(WallpaperColorsCompat wallpaperColors) {
Pair<Integer, Integer> colors = mExtractionType.extractInto(wallpaperColors);
if (colors != null) {
mMainColor = colors.first;
mSecondaryColor = colors.second;
} else {
mMainColor = FALLBACK_COLOR;
mSecondaryColor = FALLBACK_COLOR;
}
mSupportsDarkText = wallpaperColors != null
? (wallpaperColors.getColorHints()
& WallpaperColorsCompat.HINT_SUPPORTS_DARK_TEXT) > 0 : false;
mIsDark = wallpaperColors != null
? (wallpaperColors.getColorHints()
& WallpaperColorsCompat.HINT_SUPPORTS_DARK_THEME) > 0 : false;
}
public void addOnChangeListener(OnChangeListener listener) {
mListeners.add(listener);
}
public void removeOnChangeListener(OnChangeListener listener) {
mListeners.remove(listener);
}
private void notifyChange() {
OnChangeListener[] copy =
mTempListeners != null && mTempListeners.length == mListeners.size() ?
mTempListeners : new OnChangeListener[mListeners.size()];
// Create a new array to avoid concurrent modification when the activity destroys itself.
mTempListeners = mListeners.toArray(copy);
for (OnChangeListener listener : mTempListeners) {
listener.onExtractedColorsChanged(this);
}
}
public interface OnChangeListener {
void onExtractedColorsChanged(WallpaperColorInfo wallpaperColorInfo);
}
}
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