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/*
* Copyright (C) 2016 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.dynamicui;
import android.app.WallpaperManager;
import android.content.Context;
import android.graphics.Color;
import android.support.annotation.Nullable;
import android.support.v4.graphics.ColorUtils;
import android.support.v7.graphics.Palette;
import android.util.Log;
import com.android.launcher3.Utilities;
import com.android.launcher3.config.FeatureFlags;
import com.android.launcher3.dynamicui.colorextraction.ColorExtractor;
import java.util.ArrayList;
import java.util.Arrays;
/**
* Saves and loads colors extracted from the wallpaper, as well as the associated wallpaper id.
*/
public class ExtractedColors {
private static final String TAG = "ExtractedColors";
public static final int DEFAULT_LIGHT = Color.WHITE;
public static final int DEFAULT_DARK = Color.BLACK;
// These color profile indices should NOT be changed, since they are used when saving and
// loading extracted colors. New colors should always be added at the end.
public static final int VERSION_INDEX = 0;
public static final int HOTSEAT_INDEX = 1;
public static final int STATUS_BAR_INDEX = 2;
public static final int WALLPAPER_VIBRANT_INDEX = 3;
public static final int ALLAPPS_GRADIENT_MAIN_INDEX = 4;
public static final int ALLAPPS_GRADIENT_SECONDARY_INDEX = 5;
private static final int VERSION;
private static final int[] DEFAULT_VALUES;
static {
if (FeatureFlags.LAUNCHER3_GRADIENT_ALL_APPS) {
VERSION = 3;
DEFAULT_VALUES = new int[] {
VERSION, // VERSION_INDEX
0x40FFFFFF, // HOTSEAT_INDEX: White with 25% alpha
DEFAULT_DARK, // STATUS_BAR_INDEX
0xFFCCCCCC, // WALLPAPER_VIBRANT_INDEX
0xFF000000, // ALLAPPS_GRADIENT_MAIN_INDEX
0xFF000000 // ALLAPPS_GRADIENT_SECONDARY_INDEX
};
} else if (FeatureFlags.QSB_IN_HOTSEAT) {
VERSION = 2;
DEFAULT_VALUES = new int[] {
VERSION, // VERSION_INDEX
0x40FFFFFF, // HOTSEAT_INDEX: White with 25% alpha
DEFAULT_DARK, // STATUS_BAR_INDEX
0xFFCCCCCC, // WALLPAPER_VIBRANT_INDEX
};
} else {
VERSION = 1;
DEFAULT_VALUES = new int[] {
VERSION, // VERSION_INDEX
0x40FFFFFF, // HOTSEAT_INDEX: White with 25% alpha
DEFAULT_DARK, // STATUS_BAR_INDEX
};
}
}
private static final String COLOR_SEPARATOR = ",";
private final ArrayList<OnChangeListener> mListeners = new ArrayList<>();
private final int[] mColors;
public ExtractedColors() {
// The first entry is reserved for the version number.
mColors = Arrays.copyOf(DEFAULT_VALUES, DEFAULT_VALUES.length);
}
public void setColorAtIndex(int index, int color) {
if (index > VERSION_INDEX && index < mColors.length) {
mColors[index] = color;
} else {
Log.e(TAG, "Attempted to set a color at an invalid index " + index);
}
}
/**
* Encodes {@link #mColors} as a comma-separated String.
*/
String encodeAsString() {
StringBuilder colorsStringBuilder = new StringBuilder();
for (int color : mColors) {
colorsStringBuilder.append(color).append(COLOR_SEPARATOR);
}
return colorsStringBuilder.toString();
}
/**
* Loads colors and wallpaper id from {@link Utilities#getPrefs(Context)}.
* These were saved there in {@link ColorExtractionService}.
*/
public void load(Context context) {
String encodedString = Utilities.getPrefs(context).getString(
ExtractionUtils.EXTRACTED_COLORS_PREFERENCE_KEY, VERSION + "");
String[] splitColorsString = encodedString.split(COLOR_SEPARATOR);
if (splitColorsString.length == DEFAULT_VALUES.length &&
Integer.parseInt(splitColorsString[VERSION_INDEX]) == VERSION) {
// Parse and apply the saved values.
for (int i = 0; i < mColors.length; i++) {
mColors[i] = Integer.parseInt(splitColorsString[i]);
}
} else {
// Leave the values as default values as the saved values may not be compatible.
ExtractionUtils.startColorExtractionService(context);
}
}
/** @param index must be one of the index values defined at the top of this class. */
public int getColor(int index) {
return mColors[index];
}
/**
* The hotseat's color is defined as follows:
* - 12% black for super light wallpaper
* - 18% white for super dark
* - 25% white otherwise
*/
public void updateHotseatPalette(Palette hotseatPalette) {
int hotseatColor;
if (hotseatPalette != null && ExtractionUtils.isSuperLight(hotseatPalette)) {
hotseatColor = ColorUtils.setAlphaComponent(Color.BLACK, (int) (0.12f * 255));
} else if (hotseatPalette != null && ExtractionUtils.isSuperDark(hotseatPalette)) {
hotseatColor = ColorUtils.setAlphaComponent(Color.WHITE, (int) (0.18f * 255));
} else {
hotseatColor = DEFAULT_VALUES[HOTSEAT_INDEX];
}
setColorAtIndex(HOTSEAT_INDEX, hotseatColor);
}
public void updateStatusBarPalette(Palette statusBarPalette) {
setColorAtIndex(STATUS_BAR_INDEX, ExtractionUtils.isSuperLight(statusBarPalette) ?
DEFAULT_LIGHT : DEFAULT_DARK);
}
public void updateWallpaperThemePalette(@Nullable Palette wallpaperPalette) {
int defaultColor = DEFAULT_VALUES[WALLPAPER_VIBRANT_INDEX];
setColorAtIndex(WALLPAPER_VIBRANT_INDEX, wallpaperPalette == null
? defaultColor : wallpaperPalette.getVibrantColor(defaultColor));
}
public void updateAllAppsGradientPalette(Context context) {
// TODO use isAtLeastO when available
try {
WallpaperManager.class.getDeclaredMethod("getWallpaperColors", int.class);
ColorExtractor extractor = new ColorExtractor(context);
ColorExtractor.GradientColors colors = extractor.getColors();
setColorAtIndex(ALLAPPS_GRADIENT_MAIN_INDEX, colors.getMainColor());
setColorAtIndex(ALLAPPS_GRADIENT_SECONDARY_INDEX, colors.getSecondaryColor());
} catch (NoSuchMethodException e) {
setColorAtIndex(ALLAPPS_GRADIENT_MAIN_INDEX, Color.WHITE);
setColorAtIndex(ALLAPPS_GRADIENT_SECONDARY_INDEX, Color.WHITE);
}
}
public void addOnChangeListener(OnChangeListener listener) {
mListeners.add(listener);
}
public void notifyChange() {
for (OnChangeListener listener : mListeners) {
listener.onExtractedColorsChanged();
}
}
/**
* Interface for listening for extracted color changes
*/
public interface OnChangeListener {
void onExtractedColorsChanged();
}
}
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