content: /*
   * Copyright (C) 2015 AChep@xda <artemchep@gmail.com>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version 2
   * of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   * MA  02110-1301, USA.
   */
  package com.achep.acdisplay.graphics;
  
  import android.content.Context;
  import android.content.res.Resources;
  import android.graphics.Bitmap;
  import android.graphics.Canvas;
  import android.graphics.Paint;
  import android.graphics.drawable.Drawable;
  import android.os.SystemClock;
  import android.support.annotation.NonNull;
  import android.support.v4.os.AsyncTaskCompat;
  import android.util.Log;
  
  import com.achep.acdisplay.notifications.NotificationUtils;
  import com.achep.acdisplay.notifications.OpenNotification;
  import com.achep.base.async.AsyncTask;
  import com.achep.headsup.R;
  
  import static com.achep.base.Build.DEBUG;
  
  /**
   * The factory for generating the notification icons.
   *
   * @author Artem Chepurnoy
   */
  public class IconFactory {
  
      private static final String TAG = "IconFactory";
  
      public interface IconAsyncListener {
          void onGenerated(@NonNull Bitmap bitmap);
      }
  
      @NonNull
      public static AsyncTask<Void, Void, Bitmap> generateAsync(final @NonNull Context context,
                                                                final @NonNull OpenNotification notification,
                                                                final @NonNull IconAsyncListener listener) {
          return (AsyncTask<Void, Void, Bitmap>) AsyncTaskCompat.executeParallel(
                  new AsyncTask<Void, Void, Bitmap>() {
  
                      @Override
                      protected Bitmap doInBackground(Void... params) {
                          final long start = SystemClock.elapsedRealtime();
  
                          Bitmap output = generate(context, notification);
  
                          if (DEBUG) {
                              long delta = SystemClock.elapsedRealtime() - start;
                              Log.d(TAG, "Notification icon created in " + delta + " millis:"
                                      + " width=" + output.getWidth()
                                      + " height=" + output.getHeight());
                          }
  
                          return output;
                      }
  
                      @Override
                      protected void onPostExecute(Bitmap bitmap) {
                          super.onPostExecute(bitmap);
                          listener.onGenerated(bitmap);
                      }
  
                  });
      }
  
      public static Bitmap generate(final @NonNull Context context,
                                    final @NonNull OpenNotification notification) {
          Resources res = context.getResources();
  
          int iconRes = notification.getNotification().icon;
          Drawable drawable = NotificationUtils.getDrawable(context, notification, iconRes);
  
          final int size = res.getDimensionPixelSize(R.dimen.notification_icon_size);
          return drawable == null ? createEmptyIcon(res, size) : createIcon(drawable, size);
      }
  
      // TODO: Automatically scale the icon.
      @NonNull
      private static Bitmap createIcon(@NonNull Drawable drawable, int size) {
          Bitmap icon = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_4444);
          Canvas canvas = new Canvas(icon);
  
          drawable = drawable.mutate();
          drawable.setBounds(0, 0, size, size);
          drawable.draw(canvas);
  
          return icon;
      }
  
      @NonNull
      private static Bitmap createEmptyIcon(@NonNull Resources res, int size) {
          Paint paint = new Paint();
          paint.setAntiAlias(true);
          paint.setColor(0xDDCCCCCC); // white gray
  
          final float radius = size / 2f;
  
          Bitmap icon = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_4444);
          Canvas canvas = new Canvas(icon);
          canvas.drawCircle(radius, radius, radius, paint);
  
          Drawable drawable = res.getDrawable(R.drawable.ic_action_warning_white);
          drawable.setBounds(0, 0, size, size);
          drawable.draw(canvas);
  
          return icon;
      }
  
  }
  