content: /*
   * Copyright (C) 2019 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.server.display.color;
  
  import android.animation.ValueAnimator;
  import android.content.Context;
  import android.util.Slog;
  
  import java.io.PrintWriter;
  
  abstract class TintController {
  
      private ColorDisplayService.TintValueAnimator mAnimator;
      private Boolean mIsActivated;
  
      public ColorDisplayService.TintValueAnimator getAnimator() {
          return mAnimator;
      }
  
      public void setAnimator(ColorDisplayService.TintValueAnimator animator) {
          mAnimator = animator;
      }
  
      /**
       * Cancel the animator if it's still running.
       */
      public void cancelAnimator() {
          if (mAnimator != null) {
              mAnimator.cancel();
          }
      }
  
      /**
       * End the animator if it's still running, jumping to the end state.
       */
      public void endAnimator() {
          if (mAnimator != null) {
              mAnimator.end();
              mAnimator = null;
          }
      }
  
      public void setActivated(Boolean isActivated) {
          mIsActivated = isActivated;
      }
  
      public boolean isActivated() {
          return mIsActivated != null && mIsActivated;
      }
  
      public boolean isActivatedStateNotSet() {
          return mIsActivated == null;
      }
  
      /**
       * Dump debug information.
       */
      public void dump(PrintWriter pw) {
      }
  
      /**
       * Set up any constants needed for computing the matrix.
       */
      public abstract void setUp(Context context, boolean needsLinear);
  
      /**
       * Sets the 4x4 matrix to apply.
       */
      public abstract void setMatrix(int value);
  
      /**
       * Get the 4x4 matrix to apply.
       */
      public abstract float[] getMatrix();
  
      /**
       * Get the color transform level to apply the matrix.
       */
      public abstract int getLevel();
  
      /**
       * Returns whether or not this transform type is available on this device.
       */
      public abstract boolean isAvailable(Context context);
  
      /**
       * Format a given matrix into a string.
       *
       * @param matrix the matrix to format
       * @param columns number of columns in the matrix
       */
      static String matrixToString(float[] matrix, int columns) {
          if (matrix == null || columns <= 0) {
              Slog.e(ColorDisplayService.TAG, "Invalid arguments when formatting matrix to string,"
                      + " matrix is null: " + (matrix == null)
                      + " columns: " + columns);
              return "";
          }
  
          final StringBuilder sb = new StringBuilder("");
          for (int i = 0; i < matrix.length; i++) {
              if (i % columns == 0) {
                  sb.append("\n      ");
              }
              sb.append(String.format("%9.6f", matrix[i]));
          }
          return sb.toString();
      }
  
  }
  