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/*
* Copyright (C) 2017 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.util;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.graphics.ColorMatrix;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.SparseArray;
import android.util.TypedValue;
import com.android.launcher3.R;
import com.android.launcher3.Utilities;
import com.android.launcher3.uioverrides.WallpaperColorInfo;
/**
* Various utility methods associated with theming.
*/
public class Themes {
public static int getActivityThemeRes(Context context) {
WallpaperColorInfo wallpaperColorInfo = WallpaperColorInfo.getInstance(context);
boolean darkTheme;
if (Utilities.ATLEAST_Q) {
Configuration configuration = context.getResources().getConfiguration();
int nightMode = configuration.uiMode & Configuration.UI_MODE_NIGHT_MASK;
darkTheme = nightMode == Configuration.UI_MODE_NIGHT_YES;
} else {
darkTheme = wallpaperColorInfo.isDark();
}
if (darkTheme) {
return wallpaperColorInfo.supportsDarkText() ?
R.style.AppTheme_Dark_DarkText : wallpaperColorInfo.isMainColorDark() ?
R.style.AppTheme_Dark_DarkMainColor : R.style.AppTheme_Dark;
} else {
return wallpaperColorInfo.supportsDarkText() ?
R.style.AppTheme_DarkText : wallpaperColorInfo.isMainColorDark() ?
R.style.AppTheme_DarkMainColor : R.style.AppTheme;
}
}
public static String getDefaultBodyFont(Context context) {
TypedArray ta = context.obtainStyledAttributes(android.R.style.TextAppearance_DeviceDefault,
new int[]{android.R.attr.fontFamily});
String value = ta.getString(0);
ta.recycle();
return value;
}
public static float getDialogCornerRadius(Context context) {
return getDimension(context, android.R.attr.dialogCornerRadius,
context.getResources().getDimension(R.dimen.default_dialog_corner_radius));
}
public static float getDimension(Context context, int attr, float defaultValue) {
TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
float value = ta.getDimension(0, defaultValue);
ta.recycle();
return value;
}
public static int getColorAccent(Context context) {
return getAttrColor(context, android.R.attr.colorAccent);
}
public static int getAttrColor(Context context, int attr) {
TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
int colorAccent = ta.getColor(0, 0);
ta.recycle();
return colorAccent;
}
public static boolean getAttrBoolean(Context context, int attr) {
TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
boolean value = ta.getBoolean(0, false);
ta.recycle();
return value;
}
public static Drawable getAttrDrawable(Context context, int attr) {
TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
Drawable value = ta.getDrawable(0);
ta.recycle();
return value;
}
public static int getAttrInteger(Context context, int attr) {
TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
int value = ta.getInteger(0, 0);
ta.recycle();
return value;
}
/**
* Returns the alpha corresponding to the theme attribute {@param attr}, in the range [0, 255].
*/
public static int getAlpha(Context context, int attr) {
TypedArray ta = context.obtainStyledAttributes(new int[]{attr});
float alpha = ta.getFloat(0, 0);
ta.recycle();
return (int) (255 * alpha + 0.5f);
}
/**
* Scales a color matrix such that, when applied to color R G B A, it produces R' G' B' A' where
* R' = r * R
* G' = g * G
* B' = b * B
* A' = a * A
*
* The matrix will, for instance, turn white into r g b a, and black will remain black.
*
* @param color The color r g b a
* @param target The ColorMatrix to scale
*/
public static void setColorScaleOnMatrix(int color, ColorMatrix target) {
target.setScale(Color.red(color) / 255f, Color.green(color) / 255f,
Color.blue(color) / 255f, Color.alpha(color) / 255f);
}
/**
* Changes a color matrix such that, when applied to srcColor, it produces dstColor.
*
* Note that values on the last column of target ColorMatrix can be negative, and may result in
* negative values when applied on a color. Such negative values will be automatically shifted
* up to 0 by the framework.
*
* @param srcColor The color to start from
* @param dstColor The color to create by applying target on srcColor
* @param target The ColorMatrix to transform the color
*/
public static void setColorChangeOnMatrix(int srcColor, int dstColor, ColorMatrix target) {
target.reset();
target.getArray()[4] = Color.red(dstColor) - Color.red(srcColor);
target.getArray()[9] = Color.green(dstColor) - Color.green(srcColor);
target.getArray()[14] = Color.blue(dstColor) - Color.blue(srcColor);
target.getArray()[19] = Color.alpha(dstColor) - Color.alpha(srcColor);
}
/**
* Creates a map for attribute-name to value for all the values in {@param attrs} which can be
* held in memory for later use.
*/
public static SparseArray<TypedValue> createValueMap(Context context, AttributeSet attrSet,
IntArray keysToIgnore) {
int count = attrSet.getAttributeCount();
IntArray attrNameArray = new IntArray(count);
for (int i = 0; i < count; i++) {
attrNameArray.add(attrSet.getAttributeNameResource(i));
}
attrNameArray.removeAllValues(keysToIgnore);
int[] attrNames = attrNameArray.toArray();
SparseArray<TypedValue> result = new SparseArray<>(attrNames.length);
TypedArray ta = context.obtainStyledAttributes(attrSet, attrNames);
for (int i = 0; i < attrNames.length; i++) {
TypedValue tv = new TypedValue();
ta.getValue(i, tv);
result.put(attrNames[i], tv);
}
return result;
}
}
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