content: /*
   * Copyright (C) 2016 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.graphics;
  
  import android.content.Context;
  import android.graphics.Canvas;
  import android.graphics.Paint;
  import android.graphics.Paint.FontMetricsInt;
  import android.graphics.drawable.Drawable;
  import android.text.style.DynamicDrawableSpan;
  
  /**
   * {@link DynamicDrawableSpan} which draws a drawable tinted with the current paint color.
   */
  public class TintedDrawableSpan extends DynamicDrawableSpan {
  
      private final Drawable mDrawable;
      private int mOldTint;
  
      public TintedDrawableSpan(Context context, int resourceId) {
          super(ALIGN_BOTTOM);
          mDrawable = context.getDrawable(resourceId).mutate();
          mOldTint = 0;
          mDrawable.setTint(0);
      }
  
      @Override
      public int getSize(Paint paint, CharSequence text, int start, int end, FontMetricsInt fm) {
          fm = fm == null ? paint.getFontMetricsInt() : fm;
          int iconSize = fm.bottom - fm.top;
          mDrawable.setBounds(0, 0, iconSize, iconSize);
          return super.getSize(paint, text, start, end, fm);
      }
  
      @Override
      public void draw(Canvas canvas, CharSequence text,
              int start, int end, float x, int top, int y, int bottom, Paint paint) {
          int color = paint.getColor();
          if (mOldTint != color) {
              mOldTint = color;
              mDrawable.setTint(mOldTint);
          }
          super.draw(canvas, text, start, end, x, top, y, bottom, paint);
      }
  
      @Override
      public Drawable getDrawable() {
          return mDrawable;
      }
  }
  