1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.launcher3.util; 18 19 import android.content.Context; 20 import android.content.res.Configuration; 21 import android.content.res.TypedArray; 22 import android.graphics.Color; 23 import android.graphics.ColorMatrix; 24 import android.graphics.drawable.Drawable; 25 import android.util.AttributeSet; 26 import android.util.SparseArray; 27 import android.util.TypedValue; 28 29 import com.android.launcher3.R; 30 import com.android.launcher3.Utilities; 31 import com.android.launcher3.uioverrides.WallpaperColorInfo; 32 33 /** 34 * Various utility methods associated with theming. 35 */ 36 public class Themes { 37 getActivityThemeRes(Context context)38 public static int getActivityThemeRes(Context context) { 39 WallpaperColorInfo wallpaperColorInfo = WallpaperColorInfo.getInstance(context); 40 boolean darkTheme; 41 if (Utilities.ATLEAST_Q) { 42 Configuration configuration = context.getResources().getConfiguration(); 43 int nightMode = configuration.uiMode & Configuration.UI_MODE_NIGHT_MASK; 44 darkTheme = nightMode == Configuration.UI_MODE_NIGHT_YES; 45 } else { 46 darkTheme = wallpaperColorInfo.isDark(); 47 } 48 49 if (darkTheme) { 50 return wallpaperColorInfo.supportsDarkText() ? 51 R.style.AppTheme_Dark_DarkText : wallpaperColorInfo.isMainColorDark() ? 52 R.style.AppTheme_Dark_DarkMainColor : R.style.AppTheme_Dark; 53 } else { 54 return wallpaperColorInfo.supportsDarkText() ? 55 R.style.AppTheme_DarkText : wallpaperColorInfo.isMainColorDark() ? 56 R.style.AppTheme_DarkMainColor : R.style.AppTheme; 57 } 58 } 59 getDefaultBodyFont(Context context)60 public static String getDefaultBodyFont(Context context) { 61 TypedArray ta = context.obtainStyledAttributes(android.R.style.TextAppearance_DeviceDefault, 62 new int[]{android.R.attr.fontFamily}); 63 String value = ta.getString(0); 64 ta.recycle(); 65 return value; 66 } 67 getDialogCornerRadius(Context context)68 public static float getDialogCornerRadius(Context context) { 69 return getDimension(context, android.R.attr.dialogCornerRadius, 70 context.getResources().getDimension(R.dimen.default_dialog_corner_radius)); 71 } 72 getDimension(Context context, int attr, float defaultValue)73 public static float getDimension(Context context, int attr, float defaultValue) { 74 TypedArray ta = context.obtainStyledAttributes(new int[]{attr}); 75 float value = ta.getDimension(0, defaultValue); 76 ta.recycle(); 77 return value; 78 } 79 getColorAccent(Context context)80 public static int getColorAccent(Context context) { 81 return getAttrColor(context, android.R.attr.colorAccent); 82 } 83 getAttrColor(Context context, int attr)84 public static int getAttrColor(Context context, int attr) { 85 TypedArray ta = context.obtainStyledAttributes(new int[]{attr}); 86 int colorAccent = ta.getColor(0, 0); 87 ta.recycle(); 88 return colorAccent; 89 } 90 getAttrBoolean(Context context, int attr)91 public static boolean getAttrBoolean(Context context, int attr) { 92 TypedArray ta = context.obtainStyledAttributes(new int[]{attr}); 93 boolean value = ta.getBoolean(0, false); 94 ta.recycle(); 95 return value; 96 } 97 getAttrDrawable(Context context, int attr)98 public static Drawable getAttrDrawable(Context context, int attr) { 99 TypedArray ta = context.obtainStyledAttributes(new int[]{attr}); 100 Drawable value = ta.getDrawable(0); 101 ta.recycle(); 102 return value; 103 } 104 getAttrInteger(Context context, int attr)105 public static int getAttrInteger(Context context, int attr) { 106 TypedArray ta = context.obtainStyledAttributes(new int[]{attr}); 107 int value = ta.getInteger(0, 0); 108 ta.recycle(); 109 return value; 110 } 111 112 /** 113 * Returns the alpha corresponding to the theme attribute {@param attr}, in the range [0, 255]. 114 */ getAlpha(Context context, int attr)115 public static int getAlpha(Context context, int attr) { 116 TypedArray ta = context.obtainStyledAttributes(new int[]{attr}); 117 float alpha = ta.getFloat(0, 0); 118 ta.recycle(); 119 return (int) (255 * alpha + 0.5f); 120 } 121 122 /** 123 * Scales a color matrix such that, when applied to color R G B A, it produces R' G' B' A' where 124 * R' = r * R 125 * G' = g * G 126 * B' = b * B 127 * A' = a * A 128 * 129 * The matrix will, for instance, turn white into r g b a, and black will remain black. 130 * 131 * @param color The color r g b a 132 * @param target The ColorMatrix to scale 133 */ setColorScaleOnMatrix(int color, ColorMatrix target)134 public static void setColorScaleOnMatrix(int color, ColorMatrix target) { 135 target.setScale(Color.red(color) / 255f, Color.green(color) / 255f, 136 Color.blue(color) / 255f, Color.alpha(color) / 255f); 137 } 138 139 /** 140 * Changes a color matrix such that, when applied to srcColor, it produces dstColor. 141 * 142 * Note that values on the last column of target ColorMatrix can be negative, and may result in 143 * negative values when applied on a color. Such negative values will be automatically shifted 144 * up to 0 by the framework. 145 * 146 * @param srcColor The color to start from 147 * @param dstColor The color to create by applying target on srcColor 148 * @param target The ColorMatrix to transform the color 149 */ setColorChangeOnMatrix(int srcColor, int dstColor, ColorMatrix target)150 public static void setColorChangeOnMatrix(int srcColor, int dstColor, ColorMatrix target) { 151 target.reset(); 152 target.getArray()[4] = Color.red(dstColor) - Color.red(srcColor); 153 target.getArray()[9] = Color.green(dstColor) - Color.green(srcColor); 154 target.getArray()[14] = Color.blue(dstColor) - Color.blue(srcColor); 155 target.getArray()[19] = Color.alpha(dstColor) - Color.alpha(srcColor); 156 } 157 158 /** 159 * Creates a map for attribute-name to value for all the values in {@param attrs} which can be 160 * held in memory for later use. 161 */ createValueMap(Context context, AttributeSet attrSet, IntArray keysToIgnore)162 public static SparseArray<TypedValue> createValueMap(Context context, AttributeSet attrSet, 163 IntArray keysToIgnore) { 164 int count = attrSet.getAttributeCount(); 165 IntArray attrNameArray = new IntArray(count); 166 for (int i = 0; i < count; i++) { 167 attrNameArray.add(attrSet.getAttributeNameResource(i)); 168 } 169 attrNameArray.removeAllValues(keysToIgnore); 170 171 int[] attrNames = attrNameArray.toArray(); 172 SparseArray<TypedValue> result = new SparseArray<>(attrNames.length); 173 TypedArray ta = context.obtainStyledAttributes(attrSet, attrNames); 174 for (int i = 0; i < attrNames.length; i++) { 175 TypedValue tv = new TypedValue(); 176 ta.getValue(i, tv); 177 result.put(attrNames[i], tv); 178 } 179 180 return result; 181 } 182 } 183