1 /* 2 * Copyright (C) 2022 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 androidx.constraintlayout.motion.utils; 18 19 import android.graphics.drawable.ColorDrawable; 20 import android.graphics.drawable.Drawable; 21 import android.util.Log; 22 import android.view.View; 23 24 import androidx.constraintlayout.motion.widget.Debug; 25 import androidx.constraintlayout.widget.ConstraintAttribute; 26 27 import java.lang.reflect.InvocationTargetException; 28 import java.lang.reflect.Method; 29 30 public class CustomSupport { 31 private static final String TAG = "CustomSupport"; 32 private static final boolean DEBUG = false; 33 /** 34 * sets the interpolated value 35 * @param att 36 * @param view 37 * @param value 38 */ setInterpolatedValue(ConstraintAttribute att, View view, float[] value)39 public static void setInterpolatedValue(ConstraintAttribute att, View view, float[] value) { 40 Class<? extends View> viewClass = view.getClass(); 41 42 String methodName = "set" + att.getName(); 43 try { 44 Method method; 45 switch (att.getType()) { 46 case INT_TYPE: 47 method = viewClass.getMethod(methodName, Integer.TYPE); 48 method.invoke(view, (int) value[0]); 49 break; 50 case FLOAT_TYPE: 51 method = viewClass.getMethod(methodName, Float.TYPE); 52 method.invoke(view, value[0]); 53 break; 54 case COLOR_DRAWABLE_TYPE: { 55 method = viewClass.getMethod(methodName, Drawable.class); 56 int r = clamp((int) ((float) Math.pow(value[0], 1.0 / 2.2) * 255.0f)); 57 int g = clamp((int) ((float) Math.pow(value[1], 1.0 / 2.2) * 255.0f)); 58 int b = clamp((int) ((float) Math.pow(value[2], 1.0 / 2.2) * 255.0f)); 59 int a = clamp((int) (value[3] * 255.0f)); 60 int color = a << 24 | (r << 16) | (g << 8) | b; 61 ColorDrawable drawable = new ColorDrawable(); // TODO cache 62 drawable.setColor(color); 63 method.invoke(view, drawable); 64 } 65 break; 66 case COLOR_TYPE: 67 method = viewClass.getMethod(methodName, Integer.TYPE); 68 int r = clamp((int) ((float) Math.pow(value[0], 1.0 / 2.2) * 255.0f)); 69 int g = clamp((int) ((float) Math.pow(value[1], 1.0 / 2.2) * 255.0f)); 70 int b = clamp((int) ((float) Math.pow(value[2], 1.0 / 2.2) * 255.0f)); 71 int a = clamp((int) (value[3] * 255.0f)); 72 int color = a << 24 | (r << 16) | (g << 8) | b; 73 method.invoke(view, color); 74 break; 75 case STRING_TYPE: 76 throw new RuntimeException("unable to interpolate strings " + att.getName()); 77 78 case BOOLEAN_TYPE: 79 method = viewClass.getMethod(methodName, Boolean.TYPE); 80 method.invoke(view, value[0] > 0.5f); 81 break; 82 case DIMENSION_TYPE: 83 method = viewClass.getMethod(methodName, Float.TYPE); 84 method.invoke(view, value[0]); 85 break; 86 default: 87 if (DEBUG) { 88 Log.v(TAG, att.getType().toString()); 89 } 90 } 91 } catch (NoSuchMethodException e) { 92 Log.e(TAG, "No method " + methodName + " on View \"" + Debug.getName(view) + "\"", e); 93 } catch (IllegalAccessException e) { 94 Log.e(TAG, "Cannot access method " + methodName + " on View \"" 95 + Debug.getName(view) + "\"", e); 96 } catch (InvocationTargetException e) { 97 Log.e(TAG, "Cannot invoke method " + methodName + " on View \"" 98 + Debug.getName(view) + "\"", e); 99 } 100 } 101 clamp(int c)102 private static int clamp(int c) { 103 int n = 255; 104 c &= ~(c >> 31); 105 c -= n; 106 c &= (c >> 31); 107 c += n; 108 return c; 109 } 110 } 111